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git01.mediatek.com / haproxy / 16c31b00dcb24b54f9533fc4a4bf5b7be6c9c2be / . / src / proto_http.c
blob: 82aa24172770d2eaa5af5c8708a2b92ef504e199 [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1/*
2 * HTTP protocol analyzer
3 *
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]4 * Copyright 2000-2011 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <ctype.h>
14#include <errno.h>
15#include <fcntl.h>
16#include <stdio.h>
17#include <stdlib.h>
18#include <string.h>
19#include <syslog.h>
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]20#include <time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]21
22#include <sys/socket.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25
Willy Tarreaub05405a2012-01-23 15:35:52 +0100[diff] [blame]26#include <netinet/tcp.h>
27
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]28#include <common/appsession.h>
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]29#include <common/base64.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]30#include <common/compat.h>
31#include <common/config.h>
Willy Tarreaua4cd1f52006-12-16 19:57:26 +0100[diff] [blame]32#include <common/debug.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]33#include <common/memory.h>
34#include <common/mini-clist.h>
35#include <common/standard.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200[diff] [blame]36#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]37#include <common/time.h>
38#include <common/uri_auth.h>
39#include <common/version.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]40
41#include <types/capture.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]42#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]43
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]44#include <proto/acl.h>
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]45#include <proto/arg.h>
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]46#include <proto/auth.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]47#include <proto/backend.h>
48#include <proto/buffers.h>
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]49#include <proto/checks.h>
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]50#include <proto/dumpstats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]51#include <proto/fd.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +0200[diff] [blame]52#include <proto/frontend.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]53#include <proto/log.h>
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]54#include <proto/hdr_idx.h>
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]55#include <proto/pattern.h>
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]56#include <proto/proto_tcp.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]57#include <proto/proto_http.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]58#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]59#include <proto/queue.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]60#include <proto/server.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]61#include <proto/session.h>
Willy Tarreaucff64112008-11-03 06:26:53 +0100[diff] [blame]62#include <proto/stream_interface.h>
Willy Tarreau2d212792008-08-27 21:41:35 +0200[diff] [blame]63#include <proto/stream_sock.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]64#include <proto/task.h>
65
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]66const char HTTP_100[] =
67 "HTTP/1.1 100 Continue\r\n\r\n";
68
69const struct chunk http_100_chunk = {
70 .str = (char *)&HTTP_100,
71 .len = sizeof(HTTP_100)-1
72};
73
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]74/* Warning: no "connection" header is provided with the 3xx messages below */
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]75const char *HTTP_301 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]76 "HTTP/1.1 301 Moved Permanently\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]77 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]78 "Content-length: 0\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]79 "Location: "; /* not terminated since it will be concatenated with the URL */
80
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]81const char *HTTP_302 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]82 "HTTP/1.1 302 Found\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]83 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]84 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]85 "Location: "; /* not terminated since it will be concatenated with the URL */
86
87/* same as 302 except that the browser MUST retry with the GET method */
88const char *HTTP_303 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]89 "HTTP/1.1 303 See Other\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]90 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]91 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]92 "Location: "; /* not terminated since it will be concatenated with the URL */
93
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]94/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
95const char *HTTP_401_fmt =
96 "HTTP/1.0 401 Unauthorized\r\n"
97 "Cache-Control: no-cache\r\n"
98 "Connection: close\r\n"
Willy Tarreau791d66d2006-07-08 16:53:38 +0200[diff] [blame]99 "Content-Type: text/html\r\n"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]100 "WWW-Authenticate: Basic realm=\"%s\"\r\n"
101 "\r\n"
102 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
103
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]104const char *HTTP_407_fmt =
105 "HTTP/1.0 407 Unauthorized\r\n"
106 "Cache-Control: no-cache\r\n"
107 "Connection: close\r\n"
108 "Content-Type: text/html\r\n"
109 "Proxy-Authenticate: Basic realm=\"%s\"\r\n"
110 "\r\n"
111 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
112
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]113
114const int http_err_codes[HTTP_ERR_SIZE] = {
Willy Tarreauae94d4d2011-05-11 16:28:49 +0200[diff] [blame]115 [HTTP_ERR_200] = 200, /* used by "monitor-uri" */
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]116 [HTTP_ERR_400] = 400,
117 [HTTP_ERR_403] = 403,
118 [HTTP_ERR_408] = 408,
119 [HTTP_ERR_500] = 500,
120 [HTTP_ERR_502] = 502,
121 [HTTP_ERR_503] = 503,
122 [HTTP_ERR_504] = 504,
123};
124
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]125static const char *http_err_msgs[HTTP_ERR_SIZE] = {
Willy Tarreauae94d4d2011-05-11 16:28:49 +0200[diff] [blame]126 [HTTP_ERR_200] =
127 "HTTP/1.0 200 OK\r\n"
128 "Cache-Control: no-cache\r\n"
129 "Connection: close\r\n"
130 "Content-Type: text/html\r\n"
131 "\r\n"
132 "<html><body><h1>200 OK</h1>\nService ready.\n</body></html>\n",
133
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]134 [HTTP_ERR_400] =
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]135 "HTTP/1.0 400 Bad request\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]136 "Cache-Control: no-cache\r\n"
137 "Connection: close\r\n"
138 "Content-Type: text/html\r\n"
139 "\r\n"
140 "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
141
142 [HTTP_ERR_403] =
143 "HTTP/1.0 403 Forbidden\r\n"
144 "Cache-Control: no-cache\r\n"
145 "Connection: close\r\n"
146 "Content-Type: text/html\r\n"
147 "\r\n"
148 "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
149
150 [HTTP_ERR_408] =
151 "HTTP/1.0 408 Request Time-out\r\n"
152 "Cache-Control: no-cache\r\n"
153 "Connection: close\r\n"
154 "Content-Type: text/html\r\n"
155 "\r\n"
156 "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
157
158 [HTTP_ERR_500] =
159 "HTTP/1.0 500 Server Error\r\n"
160 "Cache-Control: no-cache\r\n"
161 "Connection: close\r\n"
162 "Content-Type: text/html\r\n"
163 "\r\n"
164 "<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
165
166 [HTTP_ERR_502] =
167 "HTTP/1.0 502 Bad Gateway\r\n"
168 "Cache-Control: no-cache\r\n"
169 "Connection: close\r\n"
170 "Content-Type: text/html\r\n"
171 "\r\n"
172 "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
173
174 [HTTP_ERR_503] =
175 "HTTP/1.0 503 Service Unavailable\r\n"
176 "Cache-Control: no-cache\r\n"
177 "Connection: close\r\n"
178 "Content-Type: text/html\r\n"
179 "\r\n"
180 "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
181
182 [HTTP_ERR_504] =
183 "HTTP/1.0 504 Gateway Time-out\r\n"
184 "Cache-Control: no-cache\r\n"
185 "Connection: close\r\n"
186 "Content-Type: text/html\r\n"
187 "\r\n"
188 "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
189
190};
191
Cyril Bonté19979e12012-04-04 12:57:21 +0200[diff] [blame]192/* status codes available for the stats admin page (strictly 4 chars length) */
193const char *stat_status_codes[STAT_STATUS_SIZE] = {
194 [STAT_STATUS_DENY] = "DENY",
195 [STAT_STATUS_DONE] = "DONE",
196 [STAT_STATUS_ERRP] = "ERRP",
197 [STAT_STATUS_EXCD] = "EXCD",
198 [STAT_STATUS_NONE] = "NONE",
199 [STAT_STATUS_PART] = "PART",
200 [STAT_STATUS_UNKN] = "UNKN",
201};
202
203
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]204/* We must put the messages here since GCC cannot initialize consts depending
205 * on strlen().
206 */
207struct chunk http_err_chunks[HTTP_ERR_SIZE];
208
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]209#define FD_SETS_ARE_BITFIELDS
210#ifdef FD_SETS_ARE_BITFIELDS
211/*
212 * This map is used with all the FD_* macros to check whether a particular bit
213 * is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
214 * which should be encoded. When FD_ISSET() returns non-zero, it means that the
215 * byte should be encoded. Be careful to always pass bytes from 0 to 255
216 * exclusively to the macros.
217 */
218fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
219fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
220
221#else
222#error "Check if your OS uses bitfields for fd_sets"
223#endif
224
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]225void init_proto_http()
226{
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]227 int i;
228 char *tmp;
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]229 int msg;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]230
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]231 for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
232 if (!http_err_msgs[msg]) {
233 Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
234 abort();
235 }
236
237 http_err_chunks[msg].str = (char *)http_err_msgs[msg];
238 http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
239 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]240
241 /* initialize the log header encoding map : '{|}"#' should be encoded with
242 * '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
243 * URL encoding only requires '"', '#' to be encoded as well as non-
244 * printable characters above.
245 */
246 memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
247 memset(url_encode_map, 0, sizeof(url_encode_map));
248 for (i = 0; i < 32; i++) {
249 FD_SET(i, hdr_encode_map);
250 FD_SET(i, url_encode_map);
251 }
252 for (i = 127; i < 256; i++) {
253 FD_SET(i, hdr_encode_map);
254 FD_SET(i, url_encode_map);
255 }
256
257 tmp = "\"#{|}";
258 while (*tmp) {
259 FD_SET(*tmp, hdr_encode_map);
260 tmp++;
261 }
262
263 tmp = "\"#";
264 while (*tmp) {
265 FD_SET(*tmp, url_encode_map);
266 tmp++;
267 }
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]268
269 /* memory allocations */
270 pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]271 pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
William Lallemanda73203e2012-03-12 12:48:57 +0100[diff] [blame]272 pool2_uniqueid = create_pool("uniqueid", UNIQUEID_LEN, MEM_F_SHARED);
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]273}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]274
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]275/*
276 * We have 26 list of methods (1 per first letter), each of which can have
277 * up to 3 entries (2 valid, 1 null).
278 */
279struct http_method_desc {
280 http_meth_t meth;
281 int len;
282 const char text[8];
283};
284
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]285const struct http_method_desc http_methods[26][3] = {
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]286 ['C' - 'A'] = {
287 [0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
288 },
289 ['D' - 'A'] = {
290 [0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
291 },
292 ['G' - 'A'] = {
293 [0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
294 },
295 ['H' - 'A'] = {
296 [0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
297 },
298 ['P' - 'A'] = {
299 [0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
300 [1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
301 },
302 ['T' - 'A'] = {
303 [0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
304 },
305 /* rest is empty like this :
306 * [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
307 */
308};
309
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]310/* It is about twice as fast on recent architectures to lookup a byte in a
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]311 * table than to perform a boolean AND or OR between two tests. Refer to
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]312 * RFC2616 for those chars.
313 */
314
315const char http_is_spht[256] = {
316 [' '] = 1, ['\t'] = 1,
317};
318
319const char http_is_crlf[256] = {
320 ['\r'] = 1, ['\n'] = 1,
321};
322
323const char http_is_lws[256] = {
324 [' '] = 1, ['\t'] = 1,
325 ['\r'] = 1, ['\n'] = 1,
326};
327
328const char http_is_sep[256] = {
329 ['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
330 ['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
331 ['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
332 ['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
333 [' '] = 1, ['\t'] = 1, ['\\'] = 1,
334};
335
336const char http_is_ctl[256] = {
337 [0 ... 31] = 1,
338 [127] = 1,
339};
340
341/*
342 * A token is any ASCII char that is neither a separator nor a CTL char.
343 * Do not overwrite values in assignment since gcc-2.95 will not handle
344 * them correctly. Instead, define every non-CTL char's status.
345 */
346const char http_is_token[256] = {
347 [' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
348 ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
349 ['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
350 [','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
351 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
352 ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
353 ['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
354 ['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
355 ['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
356 ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
357 ['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
358 ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
359 ['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
360 ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
361 ['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
362 ['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
363 ['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
364 ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
365 ['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
366 ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
367 ['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
368 ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
369 ['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
370 ['|'] = 1, ['}'] = 0, ['~'] = 1,
371};
372
373
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]374/*
375 * An http ver_token is any ASCII which can be found in an HTTP version,
376 * which includes 'H', 'T', 'P', '/', '.' and any digit.
377 */
378const char http_is_ver_token[256] = {
379 ['.'] = 1, ['/'] = 1,
380 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
381 ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
382 ['H'] = 1, ['P'] = 1, ['T'] = 1,
383};
384
385
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]386/*
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]387 * Silent debug that outputs only in strace, using fd #-1. Trash is modified.
388 */
389#if defined(DEBUG_FSM)
390static void http_silent_debug(int line, struct session *s)
391{
392 int size = 0;
393 size += snprintf(trash + size, sizeof(trash) - size,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]394 "[%04d] req: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p o=%p sm=%d fw=%ld tf=%08x\n",
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]395 line,
396 s->si[0].state, s->si[0].fd, s->txn.req.msg_state, s->req->flags, s->req->analysers,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]397 s->req->data, s->req->size, s->req->l, s->req->w, s->req->r, s->req->p, s->req->o, s->req->to_forward, s->txn.flags);
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]398 write(-1, trash, size);
399 size = 0;
400 size += snprintf(trash + size, sizeof(trash) - size,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]401 " %04d rep: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p o=%p sm=%d fw=%ld\n",
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]402 line,
403 s->si[1].state, s->si[1].fd, s->txn.rsp.msg_state, s->rep->flags, s->rep->analysers,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]404 s->rep->data, s->rep->size, s->rep->l, s->rep->w, s->rep->r, s->rep->p, s->rep->o, s->rep->to_forward);
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]405
406 write(-1, trash, size);
407}
408#else
409#define http_silent_debug(l,s) do { } while (0)
410#endif
411
412/*
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]413 * Adds a header and its CRLF at the tail of the message's buffer, just before
414 * the last CRLF. Text length is measured first, so it cannot be NULL.
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]415 * The header is also automatically added to the index <hdr_idx>, and the end
416 * of headers is automatically adjusted. The number of bytes added is returned
417 * on success, otherwise <0 is returned indicating an error.
418 */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]419int http_header_add_tail(struct http_msg *msg, struct hdr_idx *hdr_idx, const char *text)
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]420{
421 int bytes, len;
422
423 len = strlen(text);
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]424 bytes = buffer_insert_line2(msg->buf, msg->buf->p + msg->eoh, text, len);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]425 if (!bytes)
426 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]427 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]428 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
429}
430
431/*
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]432 * Adds a header and its CRLF at the tail of the message's buffer, just before
433 * the last CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]434 * the buffer is only opened and the space reserved, but nothing is copied.
435 * The header is also automatically added to the index <hdr_idx>, and the end
436 * of headers is automatically adjusted. The number of bytes added is returned
437 * on success, otherwise <0 is returned indicating an error.
438 */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]439int http_header_add_tail2(struct http_msg *msg,
440 struct hdr_idx *hdr_idx, const char *text, int len)
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]441{
442 int bytes;
443
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]444 bytes = buffer_insert_line2(msg->buf, msg->buf->p + msg->eoh, text, len);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]445 if (!bytes)
446 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]447 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]448 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
449}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]450
451/*
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]452 * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
453 * If so, returns the position of the first non-space character relative to
454 * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
455 * to return a pointer to the place after the first space. Returns 0 if the
456 * header name does not match. Checks are case-insensitive.
457 */
458int http_header_match2(const char *hdr, const char *end,
459 const char *name, int len)
460{
461 const char *val;
462
463 if (hdr + len >= end)
464 return 0;
465 if (hdr[len] != ':')
466 return 0;
467 if (strncasecmp(hdr, name, len) != 0)
468 return 0;
469 val = hdr + len + 1;
470 while (val < end && HTTP_IS_SPHT(*val))
471 val++;
472 if ((val >= end) && (len + 2 <= end - hdr))
473 return len + 2; /* we may replace starting from second space */
474 return val - hdr;
475}
476
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]477/* Find the end of the header value contained between <s> and <e>. See RFC2616,
478 * par 2.2 for more information. Note that it requires a valid header to return
479 * a valid result. This works for headers defined as comma-separated lists.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]480 */
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]481char *find_hdr_value_end(char *s, const char *e)
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]482{
483 int quoted, qdpair;
484
485 quoted = qdpair = 0;
486 for (; s < e; s++) {
487 if (qdpair) qdpair = 0;
Willy Tarreau0f7f51f2010-08-30 11:06:34 +0200[diff] [blame]488 else if (quoted) {
489 if (*s == '\\') qdpair = 1;
490 else if (*s == '"') quoted = 0;
491 }
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]492 else if (*s == '"') quoted = 1;
493 else if (*s == ',') return s;
494 }
495 return s;
496}
497
498/* Find the first or next occurrence of header <name> in message buffer <sol>
499 * using headers index <idx>, and return it in the <ctx> structure. This
500 * structure holds everything necessary to use the header and find next
501 * occurrence. If its <idx> member is 0, the header is searched from the
502 * beginning. Otherwise, the next occurrence is returned. The function returns
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]503 * 1 when it finds a value, and 0 when there is no more. It is designed to work
504 * with headers defined as comma-separated lists. As a special case, if ctx->val
505 * is NULL when searching for a new values of a header, the current header is
506 * rescanned. This allows rescanning after a header deletion.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]507 */
508int http_find_header2(const char *name, int len,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]509 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]510 struct hdr_ctx *ctx)
511{
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]512 char *eol, *sov;
513 int cur_idx, old_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]514
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]515 cur_idx = ctx->idx;
516 if (cur_idx) {
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]517 /* We have previously returned a value, let's search
518 * another one on the same line.
519 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]520 sol = ctx->line;
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]521 ctx->del = ctx->val + ctx->vlen + ctx->tws;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]522 sov = sol + ctx->del;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]523 eol = sol + idx->v[cur_idx].len;
524
525 if (sov >= eol)
526 /* no more values in this header */
527 goto next_hdr;
528
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]529 /* values remaining for this header, skip the comma but save it
530 * for later use (eg: for header deletion).
531 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]532 sov++;
533 while (sov < eol && http_is_lws[(unsigned char)*sov])
534 sov++;
535
536 goto return_hdr;
537 }
538
539 /* first request for this header */
540 sol += hdr_idx_first_pos(idx);
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]541 old_idx = 0;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]542 cur_idx = hdr_idx_first_idx(idx);
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]543 while (cur_idx) {
544 eol = sol + idx->v[cur_idx].len;
545
Willy Tarreau1ad7c6d2007-06-10 21:42:55 +0200[diff] [blame]546 if (len == 0) {
547 /* No argument was passed, we want any header.
548 * To achieve this, we simply build a fake request. */
549 while (sol + len < eol && sol[len] != ':')
550 len++;
551 name = sol;
552 }
553
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]554 if ((len < eol - sol) &&
555 (sol[len] == ':') &&
556 (strncasecmp(sol, name, len) == 0)) {
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]557 ctx->del = len;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]558 sov = sol + len + 1;
559 while (sov < eol && http_is_lws[(unsigned char)*sov])
560 sov++;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]561
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]562 ctx->line = sol;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]563 ctx->prev = old_idx;
564 return_hdr:
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]565 ctx->idx = cur_idx;
566 ctx->val = sov - sol;
567
568 eol = find_hdr_value_end(sov, eol);
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]569 ctx->tws = 0;
Willy Tarreau275600b2011-09-16 08:11:26 +0200[diff] [blame]570 while (eol > sov && http_is_lws[(unsigned char)*(eol - 1)]) {
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]571 eol--;
572 ctx->tws++;
573 }
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]574 ctx->vlen = eol - sov;
575 return 1;
576 }
577 next_hdr:
578 sol = eol + idx->v[cur_idx].cr + 1;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]579 old_idx = cur_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]580 cur_idx = idx->v[cur_idx].next;
581 }
582 return 0;
583}
584
585int http_find_header(const char *name,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]586 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]587 struct hdr_ctx *ctx)
588{
589 return http_find_header2(name, strlen(name), sol, idx, ctx);
590}
591
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]592/* Remove one value of a header. This only works on a <ctx> returned by one of
593 * the http_find_header functions. The value is removed, as well as surrounding
594 * commas if any. If the removed value was alone, the whole header is removed.
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]595 * The ctx is always updated accordingly, as well as the buffer and HTTP
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]596 * message <msg>. The new index is returned. If it is zero, it means there is
597 * no more header, so any processing may stop. The ctx is always left in a form
598 * that can be handled by http_find_header2() to find next occurrence.
599 */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]600int http_remove_header2(struct http_msg *msg, struct hdr_idx *idx, struct hdr_ctx *ctx)
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]601{
602 int cur_idx = ctx->idx;
603 char *sol = ctx->line;
604 struct hdr_idx_elem *hdr;
605 int delta, skip_comma;
606
607 if (!cur_idx)
608 return 0;
609
610 hdr = &idx->v[cur_idx];
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]611 if (sol[ctx->del] == ':' && ctx->val + ctx->vlen + ctx->tws == hdr->len) {
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]612 /* This was the only value of the header, we must now remove it entirely. */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]613 delta = buffer_replace2(msg->buf, sol, sol + hdr->len + hdr->cr + 1, NULL, 0);
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]614 http_msg_move_end(msg, delta);
615 idx->used--;
616 hdr->len = 0; /* unused entry */
617 idx->v[ctx->prev].next = idx->v[ctx->idx].next;
Willy Tarreau5c4784f2011-02-12 13:07:35 +0100[diff] [blame]618 if (idx->tail == ctx->idx)
619 idx->tail = ctx->prev;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]620 ctx->idx = ctx->prev; /* walk back to the end of previous header */
621 ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1;
622 ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]623 ctx->tws = ctx->vlen = 0;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]624 return ctx->idx;
625 }
626
627 /* This was not the only value of this header. We have to remove between
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]628 * ctx->del+1 and ctx->val+ctx->vlen+ctx->tws+1 included. If it is the
629 * last entry of the list, we remove the last separator.
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]630 */
631
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]632 skip_comma = (ctx->val + ctx->vlen + ctx->tws == hdr->len) ? 0 : 1;
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]633 delta = buffer_replace2(msg->buf, sol + ctx->del + skip_comma,
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]634 sol + ctx->val + ctx->vlen + ctx->tws + skip_comma,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]635 NULL, 0);
636 hdr->len += delta;
637 http_msg_move_end(msg, delta);
638 ctx->val = ctx->del;
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]639 ctx->tws = ctx->vlen = 0;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]640 return ctx->idx;
641}
642
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]643/* This function handles a server error at the stream interface level. The
644 * stream interface is assumed to be already in a closed state. An optional
645 * message is copied into the input buffer, and an HTTP status code stored.
646 * The error flags are set to the values in arguments. Any pending request
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]647 * in this buffer will be lost.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]648 */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]649static void http_server_error(struct session *t, struct stream_interface *si,
650 int err, int finst, int status, const struct chunk *msg)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]651{
Willy Tarreaud5fd51c2010-01-22 14:17:47 +0100[diff] [blame]652 buffer_auto_read(si->ob);
653 buffer_abort(si->ob);
654 buffer_auto_close(si->ob);
655 buffer_erase(si->ob);
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]656 buffer_auto_close(si->ib);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]657 buffer_auto_read(si->ib);
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]658 if (status > 0 && msg) {
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]659 t->txn.status = status;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]660 bo_inject(si->ib, msg->str, msg->len);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]661 }
662 if (!(t->flags & SN_ERR_MASK))
663 t->flags |= err;
664 if (!(t->flags & SN_FINST_MASK))
665 t->flags |= finst;
666}
667
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]668/* This function returns the appropriate error location for the given session
669 * and message.
670 */
671
672struct chunk *error_message(struct session *s, int msgnum)
673{
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]674 if (s->be->errmsg[msgnum].str)
675 return &s->be->errmsg[msgnum];
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]676 else if (s->fe->errmsg[msgnum].str)
677 return &s->fe->errmsg[msgnum];
678 else
679 return &http_err_chunks[msgnum];
680}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]681
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]682/*
683 * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
684 * string), HTTP_METH_OTHER for unknown methods, or the identified method.
685 */
686static http_meth_t find_http_meth(const char *str, const int len)
687{
688 unsigned char m;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]689 const struct http_method_desc *h;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]690
691 m = ((unsigned)*str - 'A');
692
693 if (m < 26) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]694 for (h = http_methods[m]; h->len > 0; h++) {
695 if (unlikely(h->len != len))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]696 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]697 if (likely(memcmp(str, h->text, h->len) == 0))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]698 return h->meth;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]699 };
700 return HTTP_METH_OTHER;
701 }
702 return HTTP_METH_NONE;
703
704}
705
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]706/* Parse the URI from the given transaction (which is assumed to be in request
707 * phase) and look for the "/" beginning the PATH. If not found, return NULL.
708 * It is returned otherwise.
709 */
710static char *
711http_get_path(struct http_txn *txn)
712{
713 char *ptr, *end;
714
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]715 ptr = txn->req.buf->p + txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]716 end = ptr + txn->req.sl.rq.u_l;
717
718 if (ptr >= end)
719 return NULL;
720
721 /* RFC2616, par. 5.1.2 :
722 * Request-URI = "*" | absuri | abspath | authority
723 */
724
725 if (*ptr == '*')
726 return NULL;
727
728 if (isalpha((unsigned char)*ptr)) {
729 /* this is a scheme as described by RFC3986, par. 3.1 */
730 ptr++;
731 while (ptr < end &&
732 (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
733 ptr++;
734 /* skip '://' */
735 if (ptr == end || *ptr++ != ':')
736 return NULL;
737 if (ptr == end || *ptr++ != '/')
738 return NULL;
739 if (ptr == end || *ptr++ != '/')
740 return NULL;
741 }
742 /* skip [user[:passwd]@]host[:[port]] */
743
744 while (ptr < end && *ptr != '/')
745 ptr++;
746
747 if (ptr == end)
748 return NULL;
749
750 /* OK, we got the '/' ! */
751 return ptr;
752}
753
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]754/* Returns a 302 for a redirectable request. This may only be called just after
755 * the stream interface has moved to SI_ST_ASS. Unprocessable requests are
756 * left unchanged and will follow normal proxy processing.
757 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]758void perform_http_redirect(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]759{
760 struct http_txn *txn;
761 struct chunk rdr;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]762 struct server *srv;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]763 char *path;
764 int len;
765
766 /* 1: create the response header */
767 rdr.len = strlen(HTTP_302);
768 rdr.str = trash;
Willy Tarreau59e0b0f2010-01-09 21:29:23 +0100[diff] [blame]769 rdr.size = sizeof(trash);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]770 memcpy(rdr.str, HTTP_302, rdr.len);
771
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]772 srv = target_srv(&s->target);
773
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]774 /* 2: add the server's prefix */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]775 if (rdr.len + srv->rdr_len > rdr.size)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]776 return;
777
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]778 /* special prefix "/" means don't change URL */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]779 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
780 memcpy(rdr.str + rdr.len, srv->rdr_pfx, srv->rdr_len);
781 rdr.len += srv->rdr_len;
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]782 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]783
784 /* 3: add the request URI */
785 txn = &s->txn;
786 path = http_get_path(txn);
787 if (!path)
788 return;
789
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]790 len = txn->req.sl.rq.u_l + (s->req->p + txn->req.sol + txn->req.sl.rq.u) - path;
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]791 if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]792 return;
793
794 memcpy(rdr.str + rdr.len, path, len);
795 rdr.len += len;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]796
797 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
798 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
799 rdr.len += 29;
800 } else {
801 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
802 rdr.len += 23;
803 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]804
805 /* prepare to return without error. */
Willy Tarreau99126c32008-11-27 10:30:51 +0100[diff] [blame]806 si->shutr(si);
807 si->shutw(si);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]808 si->err_type = SI_ET_NONE;
809 si->err_loc = NULL;
810 si->state = SI_ST_CLO;
811
812 /* send the message */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]813 http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]814
815 /* FIXME: we should increase a counter of redirects per server and per backend. */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]816 if (srv)
817 srv_inc_sess_ctr(srv);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]818}
819
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]820/* Return the error message corresponding to si->err_type. It is assumed
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]821 * that the server side is closed. Note that err_type is actually a
822 * bitmask, where almost only aborts may be cumulated with other
823 * values. We consider that aborted operations are more important
824 * than timeouts or errors due to the fact that nobody else in the
825 * logs might explain incomplete retries. All others should avoid
826 * being cumulated. It should normally not be possible to have multiple
827 * aborts at once, but just in case, the first one in sequence is reported.
828 */
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]829void http_return_srv_error(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]830{
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]831 int err_type = si->err_type;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]832
833 if (err_type & SI_ET_QUEUE_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]834 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
835 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]836 else if (err_type & SI_ET_CONN_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]837 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
838 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]839 else if (err_type & SI_ET_QUEUE_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]840 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
841 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]842 else if (err_type & SI_ET_QUEUE_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]843 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q,
844 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]845 else if (err_type & SI_ET_CONN_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]846 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
847 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]848 else if (err_type & SI_ET_CONN_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]849 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
850 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]851 else /* SI_ET_CONN_OTHER and others */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]852 http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
853 500, error_message(s, HTTP_ERR_500));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]854}
855
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]856extern const char sess_term_cond[8];
857extern const char sess_fin_state[8];
858extern const char *monthname[12];
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]859struct pool_head *pool2_requri;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]860struct pool_head *pool2_capture;
William Lallemanda73203e2012-03-12 12:48:57 +0100[diff] [blame]861struct pool_head *pool2_uniqueid;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]862
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]863/*
864 * Capture headers from message starting at <som> according to header list
865 * <cap_hdr>, and fill the <idx> structure appropriately.
866 */
867void capture_headers(char *som, struct hdr_idx *idx,
868 char **cap, struct cap_hdr *cap_hdr)
869{
870 char *eol, *sol, *col, *sov;
871 int cur_idx;
872 struct cap_hdr *h;
873 int len;
874
875 sol = som + hdr_idx_first_pos(idx);
876 cur_idx = hdr_idx_first_idx(idx);
877
878 while (cur_idx) {
879 eol = sol + idx->v[cur_idx].len;
880
881 col = sol;
882 while (col < eol && *col != ':')
883 col++;
884
885 sov = col + 1;
886 while (sov < eol && http_is_lws[(unsigned char)*sov])
887 sov++;
888
889 for (h = cap_hdr; h; h = h->next) {
890 if ((h->namelen == col - sol) &&
891 (strncasecmp(sol, h->name, h->namelen) == 0)) {
892 if (cap[h->index] == NULL)
893 cap[h->index] =
Willy Tarreaucf7f3202007-05-13 22:46:04 +0200[diff] [blame]894 pool_alloc2(h->pool);
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]895
896 if (cap[h->index] == NULL) {
897 Alert("HTTP capture : out of memory.\n");
898 continue;
899 }
900
901 len = eol - sov;
902 if (len > h->len)
903 len = h->len;
904
905 memcpy(cap[h->index], sov, len);
906 cap[h->index][len]=0;
907 }
908 }
909 sol = eol + idx->v[cur_idx].cr + 1;
910 cur_idx = idx->v[cur_idx].next;
911 }
912}
913
914
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]915/* either we find an LF at <ptr> or we jump to <bad>.
916 */
917#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
918
919/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
920 * otherwise to <http_msg_ood> with <state> set to <st>.
921 */
922#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
923 ptr++; \
924 if (likely(ptr < end)) \
925 goto good; \
926 else { \
927 state = (st); \
928 goto http_msg_ood; \
929 } \
930 } while (0)
931
932
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]933/*
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]934 * This function parses a status line between <ptr> and <end>, starting with
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]935 * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
936 * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
937 * will give undefined results.
938 * Note that it is upon the caller's responsibility to ensure that ptr < end,
939 * and that msg->sol points to the beginning of the response.
940 * If a complete line is found (which implies that at least one CR or LF is
941 * found before <end>, the updated <ptr> is returned, otherwise NULL is
942 * returned indicating an incomplete line (which does not mean that parts have
943 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
944 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
945 * upon next call.
946 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]947 * This function was intentionally designed to be called from
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]948 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
949 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]950 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]951 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]952const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
953 unsigned int state, const char *ptr, const char *end,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]954 unsigned int *ret_ptr, unsigned int *ret_state)
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]955{
Willy Tarreau62f791e2012-03-09 11:32:30 +0100[diff] [blame]956 const char *msg_start = msg->buf->p;
957
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]958 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]959 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]960 http_msg_rpver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]961 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]962 EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
963
964 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]965 msg->sl.st.v_l = ptr - msg_start;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]966 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
967 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]968 state = HTTP_MSG_ERROR;
969 break;
970
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]971 case HTTP_MSG_RPVER_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]972 http_msg_rpver_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]973 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]974 msg->sl.st.c = ptr - msg_start;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]975 goto http_msg_rpcode;
976 }
977 if (likely(HTTP_IS_SPHT(*ptr)))
978 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
979 /* so it's a CR/LF, this is invalid */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]980 state = HTTP_MSG_ERROR;
981 break;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]982
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]983 case HTTP_MSG_RPCODE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]984 http_msg_rpcode:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]985 if (likely(!HTTP_IS_LWS(*ptr)))
986 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
987
988 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]989 msg->sl.st.c_l = ptr - msg_start - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]990 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
991 }
992
993 /* so it's a CR/LF, so there is no reason phrase */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]994 msg->sl.st.c_l = ptr - msg_start - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]995 http_msg_rsp_reason:
996 /* FIXME: should we support HTTP responses without any reason phrase ? */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]997 msg->sl.st.r = ptr - msg_start;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]998 msg->sl.st.r_l = 0;
999 goto http_msg_rpline_eol;
1000
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1001 case HTTP_MSG_RPCODE_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1002 http_msg_rpcode_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1003 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1004 msg->sl.st.r = ptr - msg_start;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1005 goto http_msg_rpreason;
1006 }
1007 if (likely(HTTP_IS_SPHT(*ptr)))
1008 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1009 /* so it's a CR/LF, so there is no reason phrase */
1010 goto http_msg_rsp_reason;
1011
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1012 case HTTP_MSG_RPREASON:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1013 http_msg_rpreason:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1014 if (likely(!HTTP_IS_CRLF(*ptr)))
1015 EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1016 msg->sl.st.r_l = ptr - msg_start - msg->sl.st.r;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1017 http_msg_rpline_eol:
1018 /* We have seen the end of line. Note that we do not
1019 * necessarily have the \n yet, but at least we know that we
1020 * have EITHER \r OR \n, otherwise the response would not be
1021 * complete. We can then record the response length and return
1022 * to the caller which will be able to register it.
1023 */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1024 msg->sl.st.l = ptr - msg_start - msg->sol;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1025 return ptr;
1026
1027#ifdef DEBUG_FULL
1028 default:
1029 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1030 exit(1);
1031#endif
1032 }
1033
1034 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1035 /* out of valid data */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1036 if (ret_state)
1037 *ret_state = state;
1038 if (ret_ptr)
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1039 *ret_ptr = ptr - msg_start;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1040 return NULL;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1041}
1042
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1043/*
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1044 * This function parses a request line between <ptr> and <end>, starting with
1045 * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
1046 * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
1047 * will give undefined results.
1048 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1049 * and that msg->sol points to the beginning of the request.
1050 * If a complete line is found (which implies that at least one CR or LF is
1051 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1052 * returned indicating an incomplete line (which does not mean that parts have
1053 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1054 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1055 * upon next call.
1056 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1057 * This function was intentionally designed to be called from
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1058 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1059 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1060 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1061 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1062const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
1063 unsigned int state, const char *ptr, const char *end,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1064 unsigned int *ret_ptr, unsigned int *ret_state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1065{
Willy Tarreau62f791e2012-03-09 11:32:30 +0100[diff] [blame]1066 const char *msg_start = msg->buf->p;
1067
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1068 switch (state) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1069 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1070 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1071 if (likely(HTTP_IS_TOKEN(*ptr)))
1072 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1073
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1074 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1075 msg->sl.rq.m_l = ptr - msg_start;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1076 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1077 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1078
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1079 if (likely(HTTP_IS_CRLF(*ptr))) {
1080 /* HTTP 0.9 request */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1081 msg->sl.rq.m_l = ptr - msg_start;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1082 http_msg_req09_uri:
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1083 msg->sl.rq.u = ptr - msg_start;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1084 http_msg_req09_uri_e:
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1085 msg->sl.rq.u_l = ptr - msg_start - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1086 http_msg_req09_ver:
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1087 msg->sl.rq.v = ptr - msg_start;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1088 msg->sl.rq.v_l = 0;
1089 goto http_msg_rqline_eol;
1090 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1091 state = HTTP_MSG_ERROR;
1092 break;
1093
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1094 case HTTP_MSG_RQMETH_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1095 http_msg_rqmeth_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1096 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1097 msg->sl.rq.u = ptr - msg_start;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1098 goto http_msg_rquri;
1099 }
1100 if (likely(HTTP_IS_SPHT(*ptr)))
1101 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1102 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1103 goto http_msg_req09_uri;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1104
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1105 case HTTP_MSG_RQURI:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1106 http_msg_rquri:
Willy Tarreau2e9506d2012-01-07 23:22:31 +0100[diff] [blame]1107 if (likely((unsigned char)(*ptr - 33) <= 93)) /* 33 to 126 included */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1108 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1109
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1110 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1111 msg->sl.rq.u_l = ptr - msg_start - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1112 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1113 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1114
Willy Tarreau2e9506d2012-01-07 23:22:31 +0100[diff] [blame]1115 if (likely((unsigned char)*ptr >= 128)) {
Willy Tarreau422246e2012-01-07 23:54:13 +0100[diff] [blame]1116 /* non-ASCII chars are forbidden unless option
1117 * accept-invalid-http-request is enabled in the frontend.
1118 * In any case, we capture the faulty char.
Willy Tarreau2e9506d2012-01-07 23:22:31 +0100[diff] [blame]1119 */
Willy Tarreau422246e2012-01-07 23:54:13 +0100[diff] [blame]1120 if (msg->err_pos < -1)
1121 goto invalid_char;
1122 if (msg->err_pos == -1)
1123 msg->err_pos = ptr - msg_buf;
Willy Tarreau2e9506d2012-01-07 23:22:31 +0100[diff] [blame]1124 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
1125 }
1126
1127 if (likely(HTTP_IS_CRLF(*ptr))) {
1128 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1129 goto http_msg_req09_uri_e;
1130 }
1131
1132 /* OK forbidden chars, 0..31 or 127 */
Willy Tarreau422246e2012-01-07 23:54:13 +0100[diff] [blame]1133 invalid_char:
1134 msg->err_pos = ptr - msg_buf;
Willy Tarreau2e9506d2012-01-07 23:22:31 +0100[diff] [blame]1135 state = HTTP_MSG_ERROR;
1136 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1137
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1138 case HTTP_MSG_RQURI_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1139 http_msg_rquri_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1140 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1141 msg->sl.rq.v = ptr - msg_start;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1142 goto http_msg_rqver;
1143 }
1144 if (likely(HTTP_IS_SPHT(*ptr)))
1145 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1146 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1147 goto http_msg_req09_ver;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1148
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1149 case HTTP_MSG_RQVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1150 http_msg_rqver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1151 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1152 EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1153
1154 if (likely(HTTP_IS_CRLF(*ptr))) {
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1155 msg->sl.rq.v_l = ptr - msg_start - msg->sl.rq.v;
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1156 http_msg_rqline_eol:
1157 /* We have seen the end of line. Note that we do not
1158 * necessarily have the \n yet, but at least we know that we
1159 * have EITHER \r OR \n, otherwise the request would not be
1160 * complete. We can then record the request length and return
1161 * to the caller which will be able to register it.
1162 */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1163 msg->sl.rq.l = ptr - msg_start - msg->sol;
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1164 return ptr;
1165 }
1166
1167 /* neither an HTTP_VER token nor a CRLF */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1168 state = HTTP_MSG_ERROR;
1169 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1170
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1171#ifdef DEBUG_FULL
1172 default:
1173 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1174 exit(1);
1175#endif
1176 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1177
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1178 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1179 /* out of valid data */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1180 if (ret_state)
1181 *ret_state = state;
1182 if (ret_ptr)
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1183 *ret_ptr = ptr - msg_start;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1184 return NULL;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1185}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1186
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1187/*
1188 * Returns the data from Authorization header. Function may be called more
1189 * than once so data is stored in txn->auth_data. When no header is found
1190 * or auth method is unknown auth_method is set to HTTP_AUTH_WRONG to avoid
1191 * searching again for something we are unable to find anyway.
1192 */
1193
1194char get_http_auth_buff[BUFSIZE];
1195
1196int
1197get_http_auth(struct session *s)
1198{
1199
1200 struct http_txn *txn = &s->txn;
1201 struct chunk auth_method;
1202 struct hdr_ctx ctx;
1203 char *h, *p;
1204 int len;
1205
1206#ifdef DEBUG_AUTH
1207 printf("Auth for session %p: %d\n", s, txn->auth.method);
1208#endif
1209
1210 if (txn->auth.method == HTTP_AUTH_WRONG)
1211 return 0;
1212
1213 if (txn->auth.method)
1214 return 1;
1215
1216 txn->auth.method = HTTP_AUTH_WRONG;
1217
1218 ctx.idx = 0;
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]1219
1220 if (txn->flags & TX_USE_PX_CONN) {
1221 h = "Proxy-Authorization";
1222 len = strlen(h);
1223 } else {
1224 h = "Authorization";
1225 len = strlen(h);
1226 }
1227
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1228 if (!http_find_header2(h, len, s->req->p + txn->req.sol, &txn->hdr_idx, &ctx))
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1229 return 0;
1230
1231 h = ctx.line + ctx.val;
1232
1233 p = memchr(h, ' ', ctx.vlen);
1234 if (!p || p == h)
1235 return 0;
1236
1237 chunk_initlen(&auth_method, h, 0, p-h);
1238 chunk_initlen(&txn->auth.method_data, p+1, 0, ctx.vlen-(p-h)-1);
1239
1240 if (!strncasecmp("Basic", auth_method.str, auth_method.len)) {
1241
1242 len = base64dec(txn->auth.method_data.str, txn->auth.method_data.len,
1243 get_http_auth_buff, BUFSIZE - 1);
1244
1245 if (len < 0)
1246 return 0;
1247
1248
1249 get_http_auth_buff[len] = '\0';
1250
1251 p = strchr(get_http_auth_buff, ':');
1252
1253 if (!p)
1254 return 0;
1255
1256 txn->auth.user = get_http_auth_buff;
1257 *p = '\0';
1258 txn->auth.pass = p+1;
1259
1260 txn->auth.method = HTTP_AUTH_BASIC;
1261 return 1;
1262 }
1263
1264 return 0;
1265}
1266
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1267
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1268/*
1269 * This function parses an HTTP message, either a request or a response,
Willy Tarreau8b1323e2012-03-09 14:46:19 +0100[diff] [blame]1270 * depending on the initial msg->msg_state. The caller is responsible for
1271 * ensuring that the message does not wrap. The function can be preempted
1272 * everywhere when data are missing and recalled at the exact same location
1273 * with no information loss. The message may even be realigned between two
1274 * calls. The header index is re-initialized when switching from
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1275 * MSG_R[PQ]BEFORE to MSG_RPVER|MSG_RQMETH. It modifies msg->sol among other
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1276 * fields. Note that msg->som and msg->sol will be initialized after completing
1277 * the first state, so that none of the msg pointers has to be initialized
1278 * prior to the first call.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1279 */
Willy Tarreaua560c212012-03-09 13:50:57 +0100[diff] [blame]1280void http_msg_analyzer(struct http_msg *msg, struct hdr_idx *idx)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1281{
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1282 unsigned int state; /* updated only when leaving the FSM */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1283 register char *ptr, *end; /* request pointers, to avoid dereferences */
Willy Tarreaua560c212012-03-09 13:50:57 +0100[diff] [blame]1284 struct buffer *buf = msg->buf;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1285
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1286 state = msg->msg_state;
Willy Tarreau8b1323e2012-03-09 14:46:19 +0100[diff] [blame]1287 ptr = buf->p + msg->next;
1288 end = buf->p + buf->i;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1289
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1290 if (unlikely(ptr >= end))
1291 goto http_msg_ood;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1292
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1293 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1294 /*
1295 * First, states that are specific to the response only.
1296 * We check them first so that request and headers are
1297 * closer to each other (accessed more often).
1298 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1299 case HTTP_MSG_RPBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1300 http_msg_rpbefore:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1301 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1302 /* we have a start of message, but we have to check
1303 * first if we need to remove some CRLF. We can only
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]1304 * do this when o=0.
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1305 */
Willy Tarreau89fa7062012-03-02 16:13:16 +0100[diff] [blame]1306 char *beg = buf->p;
1307
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1308 if (unlikely(ptr != beg)) {
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]1309 if (buf->o)
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1310 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1311 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]1312 bi_fast_delete(buf, ptr - beg);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1313 }
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1314 msg->sol = msg->som = ptr - buf->p;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1315 hdr_idx_init(idx);
1316 state = HTTP_MSG_RPVER;
1317 goto http_msg_rpver;
1318 }
1319
1320 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1321 goto http_msg_invalid;
1322
1323 if (unlikely(*ptr == '\n'))
1324 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1325 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1326 /* stop here */
1327
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1328 case HTTP_MSG_RPBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1329 http_msg_rpbefore_cr:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1330 EXPECT_LF_HERE(ptr, http_msg_invalid);
1331 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1332 /* stop here */
1333
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1334 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1335 http_msg_rpver:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1336 case HTTP_MSG_RPVER_SP:
1337 case HTTP_MSG_RPCODE:
1338 case HTTP_MSG_RPCODE_SP:
1339 case HTTP_MSG_RPREASON:
Willy Tarreau62f791e2012-03-09 11:32:30 +0100[diff] [blame]1340 ptr = (char *)http_parse_stsline(msg, buf->data,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1341 state, ptr, end,
1342 &msg->next, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1343 if (unlikely(!ptr))
1344 return;
1345
1346 /* we have a full response and we know that we have either a CR
1347 * or an LF at <ptr>.
1348 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1349 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1350
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1351 msg->sol = ptr - buf->p;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1352 if (likely(*ptr == '\r'))
1353 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1354 goto http_msg_rpline_end;
1355
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1356 case HTTP_MSG_RPLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1357 http_msg_rpline_end:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1358 /* msg->sol must point to the first of CR or LF. */
1359 EXPECT_LF_HERE(ptr, http_msg_invalid);
1360 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1361 /* stop here */
1362
1363 /*
1364 * Second, states that are specific to the request only
1365 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1366 case HTTP_MSG_RQBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1367 http_msg_rqbefore:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1368 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1369 /* we have a start of message, but we have to check
1370 * first if we need to remove some CRLF. We can only
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]1371 * do this when o=0.
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1372 */
Willy Tarreau89fa7062012-03-02 16:13:16 +0100[diff] [blame]1373 char *beg = buf->p;
1374
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1375 if (likely(ptr != beg)) {
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]1376 if (buf->o)
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1377 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1378 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]1379 bi_fast_delete(buf, ptr - beg);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1380 }
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1381 msg->sol = msg->som = ptr - buf->p;
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1382 /* we will need this when keep-alive will be supported
1383 hdr_idx_init(idx);
1384 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1385 state = HTTP_MSG_RQMETH;
1386 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1387 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1388
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1389 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1390 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1391
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1392 if (unlikely(*ptr == '\n'))
1393 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1394 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1395 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1396
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1397 case HTTP_MSG_RQBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1398 http_msg_rqbefore_cr:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1399 EXPECT_LF_HERE(ptr, http_msg_invalid);
1400 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1401 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1402
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1403 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1404 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1405 case HTTP_MSG_RQMETH_SP:
1406 case HTTP_MSG_RQURI:
1407 case HTTP_MSG_RQURI_SP:
1408 case HTTP_MSG_RQVER:
Willy Tarreau62f791e2012-03-09 11:32:30 +0100[diff] [blame]1409 ptr = (char *)http_parse_reqline(msg, buf->data,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1410 state, ptr, end,
1411 &msg->next, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1412 if (unlikely(!ptr))
1413 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1414
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1415 /* we have a full request and we know that we have either a CR
1416 * or an LF at <ptr>.
1417 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1418 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1419
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1420 msg->sol = ptr - buf->p;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1421 if (likely(*ptr == '\r'))
1422 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1423 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1424
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1425 case HTTP_MSG_RQLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1426 http_msg_rqline_end:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1427 /* check for HTTP/0.9 request : no version information available.
1428 * msg->sol must point to the first of CR or LF.
1429 */
1430 if (unlikely(msg->sl.rq.v_l == 0))
1431 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1432
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1433 EXPECT_LF_HERE(ptr, http_msg_invalid);
1434 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1435 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1436
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1437 /*
1438 * Common states below
1439 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1440 case HTTP_MSG_HDR_FIRST:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1441 http_msg_hdr_first:
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1442 msg->sol = ptr - buf->p;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1443 if (likely(!HTTP_IS_CRLF(*ptr))) {
1444 goto http_msg_hdr_name;
1445 }
1446
1447 if (likely(*ptr == '\r'))
1448 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1449 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1450
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1451 case HTTP_MSG_HDR_NAME:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1452 http_msg_hdr_name:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1453 /* assumes msg->sol points to the first char */
1454 if (likely(HTTP_IS_TOKEN(*ptr)))
1455 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1456
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]1457 if (likely(*ptr == ':'))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1458 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1459
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1460 if (likely(msg->err_pos < -1) || *ptr == '\n')
1461 goto http_msg_invalid;
1462
1463 if (msg->err_pos == -1) /* capture error pointer */
1464 msg->err_pos = ptr - buf->data; /* >= 0 now */
1465
1466 /* and we still accept this non-token character */
1467 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1468
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1469 case HTTP_MSG_HDR_L1_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1470 http_msg_hdr_l1_sp:
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]1471 /* assumes msg->sol points to the first char */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1472 if (likely(HTTP_IS_SPHT(*ptr)))
1473 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1474
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1475 /* header value can be basically anything except CR/LF */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1476 msg->sov = ptr - buf->p;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1477
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1478 if (likely(!HTTP_IS_CRLF(*ptr))) {
1479 goto http_msg_hdr_val;
1480 }
1481
1482 if (likely(*ptr == '\r'))
1483 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1484 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1485
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1486 case HTTP_MSG_HDR_L1_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1487 http_msg_hdr_l1_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1488 EXPECT_LF_HERE(ptr, http_msg_invalid);
1489 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lws, HTTP_MSG_HDR_L1_LWS);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1490
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1491 case HTTP_MSG_HDR_L1_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1492 http_msg_hdr_l1_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1493 if (likely(HTTP_IS_SPHT(*ptr))) {
1494 /* replace HT,CR,LF with spaces */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1495 for (; buf->p + msg->sov < ptr; msg->sov++)
1496 buf->p[msg->sov] = ' ';
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1497 goto http_msg_hdr_l1_sp;
1498 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1499 /* we had a header consisting only in spaces ! */
Willy Tarreau12e48b32012-03-05 16:57:34 +0100[diff] [blame]1500 msg->eol = msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1501 goto http_msg_complete_header;
1502
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1503 case HTTP_MSG_HDR_VAL:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1504 http_msg_hdr_val:
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]1505 /* assumes msg->sol points to the first char, and msg->sov
1506 * points to the first character of the value.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1507 */
1508 if (likely(!HTTP_IS_CRLF(*ptr)))
1509 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1510
Willy Tarreau12e48b32012-03-05 16:57:34 +0100[diff] [blame]1511 msg->eol = ptr - buf->p;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1512 /* Note: we could also copy eol into ->eoh so that we have the
1513 * real header end in case it ends with lots of LWS, but is this
1514 * really needed ?
1515 */
1516 if (likely(*ptr == '\r'))
1517 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1518 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1519
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1520 case HTTP_MSG_HDR_L2_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1521 http_msg_hdr_l2_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1522 EXPECT_LF_HERE(ptr, http_msg_invalid);
1523 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lws, HTTP_MSG_HDR_L2_LWS);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1524
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1525 case HTTP_MSG_HDR_L2_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1526 http_msg_hdr_l2_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1527 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1528 /* LWS: replace HT,CR,LF with spaces */
Willy Tarreau12e48b32012-03-05 16:57:34 +0100[diff] [blame]1529 for (; buf->p + msg->eol < ptr; msg->eol++)
1530 buf->p[msg->eol] = ' ';
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1531 goto http_msg_hdr_val;
1532 }
1533 http_msg_complete_header:
1534 /*
1535 * It was a new header, so the last one is finished.
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]1536 * Assumes msg->sol points to the first char, msg->sov points
1537 * to the first character of the value and msg->eol to the
1538 * first CR or LF so we know how the line ends. We insert last
1539 * header into the index.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1540 */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1541 if (unlikely(hdr_idx_add(msg->eol - msg->sol, buf->p[msg->eol] == '\r',
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1542 idx, idx->tail) < 0))
1543 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1544
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1545 msg->sol = ptr - buf->p;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1546 if (likely(!HTTP_IS_CRLF(*ptr))) {
1547 goto http_msg_hdr_name;
1548 }
1549
1550 if (likely(*ptr == '\r'))
1551 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1552 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1553
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1554 case HTTP_MSG_LAST_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1555 http_msg_last_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1556 /* Assumes msg->sol points to the first of either CR or LF */
1557 EXPECT_LF_HERE(ptr, http_msg_invalid);
1558 ptr++;
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]1559 msg->sov = msg->next = ptr - buf->p;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]1560 msg->eoh = msg->sol;
1561 msg->sol = 0;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1562 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1563 return;
Willy Tarreaub56928a2012-04-16 14:51:55 +0200[diff] [blame]1564
1565 case HTTP_MSG_ERROR:
1566 /* this may only happen if we call http_msg_analyser() twice with an error */
1567 break;
1568
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1569#ifdef DEBUG_FULL
1570 default:
1571 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1572 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1573#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1574 }
1575 http_msg_ood:
1576 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1577 msg->msg_state = state;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1578 msg->next = ptr - buf->p;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1579 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1580
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1581 http_msg_invalid:
1582 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1583 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1584 msg->next = ptr - buf->p;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1585 return;
1586}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1587
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1588/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1589 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1590 * nothing is done and 1 is returned.
1591 */
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]1592static int http_upgrade_v09_to_v10(struct http_txn *txn)
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1593{
1594 int delta;
1595 char *cur_end;
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]1596 struct http_msg *msg = &txn->req;
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1597
1598 if (msg->sl.rq.v_l != 0)
1599 return 1;
1600
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]1601 cur_end = msg->buf->p + msg->sol + msg->sl.rq.l;
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1602 delta = 0;
1603
1604 if (msg->sl.rq.u_l == 0) {
1605 /* if no URI was set, add "/" */
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]1606 delta = buffer_replace2(msg->buf, cur_end, cur_end, " /", 2);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1607 cur_end += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1608 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1609 }
1610 /* add HTTP version */
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]1611 delta = buffer_replace2(msg->buf, cur_end, cur_end, " HTTP/1.0\r\n", 11);
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1612 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1613 cur_end += delta;
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]1614 cur_end = (char *)http_parse_reqline(msg, msg->buf->data,
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1615 HTTP_MSG_RQMETH,
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]1616 msg->buf->p + msg->sol, cur_end + 1,
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1617 NULL, NULL);
1618 if (unlikely(!cur_end))
1619 return 0;
1620
1621 /* we have a full HTTP/1.0 request now and we know that
1622 * we have either a CR or an LF at <ptr>.
1623 */
1624 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1625 return 1;
1626}
1627
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1628/* Parse the Connection: header of an HTTP request, looking for both "close"
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1629 * and "keep-alive" values. If we already know that some headers may safely
1630 * be removed, we remove them now. The <to_del> flags are used for that :
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1631 * - bit 0 means remove "close" headers (in HTTP/1.0 requests/responses)
1632 * - bit 1 means remove "keep-alive" headers (in HTTP/1.1 reqs/resp to 1.1).
1633 * The TX_HDR_CONN_* flags are adjusted in txn->flags depending on what was
1634 * found, and TX_CON_*_SET is adjusted depending on what is left so only
1635 * harmless combinations may be removed. Do not call that after changes have
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1636 * been processed.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1637 */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1638void http_parse_connection_header(struct http_txn *txn, struct http_msg *msg, int to_del)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1639{
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1640 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1641 const char *hdr_val = "Connection";
1642 int hdr_len = 10;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1643
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1644 if (txn->flags & TX_HDR_CONN_PRS)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1645 return;
1646
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1647 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1648 hdr_val = "Proxy-Connection";
1649 hdr_len = 16;
1650 }
1651
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1652 ctx.idx = 0;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1653 txn->flags &= ~(TX_CON_KAL_SET|TX_CON_CLO_SET);
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1654 while (http_find_header2(hdr_val, hdr_len, msg->buf->p + msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1655 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
1656 txn->flags |= TX_HDR_CONN_KAL;
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1657 if (to_del & 2)
1658 http_remove_header2(msg, &txn->hdr_idx, &ctx);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1659 else
1660 txn->flags |= TX_CON_KAL_SET;
1661 }
1662 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
1663 txn->flags |= TX_HDR_CONN_CLO;
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1664 if (to_del & 1)
1665 http_remove_header2(msg, &txn->hdr_idx, &ctx);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1666 else
1667 txn->flags |= TX_CON_CLO_SET;
1668 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1669 }
1670
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1671 txn->flags |= TX_HDR_CONN_PRS;
1672 return;
1673}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1674
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1675/* Apply desired changes on the Connection: header. Values may be removed and/or
1676 * added depending on the <wanted> flags, which are exclusively composed of
1677 * TX_CON_CLO_SET and TX_CON_KAL_SET, depending on what flags are desired. The
1678 * TX_CON_*_SET flags are adjusted in txn->flags depending on what is left.
1679 */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1680void http_change_connection_header(struct http_txn *txn, struct http_msg *msg, int wanted)
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1681{
1682 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1683 const char *hdr_val = "Connection";
1684 int hdr_len = 10;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1685
1686 ctx.idx = 0;
1687
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1688
1689 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1690 hdr_val = "Proxy-Connection";
1691 hdr_len = 16;
1692 }
1693
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1694 txn->flags &= ~(TX_CON_CLO_SET | TX_CON_KAL_SET);
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1695 while (http_find_header2(hdr_val, hdr_len, msg->buf->p + msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1696 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
1697 if (wanted & TX_CON_KAL_SET)
1698 txn->flags |= TX_CON_KAL_SET;
1699 else
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1700 http_remove_header2(msg, &txn->hdr_idx, &ctx);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1701 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1702 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
1703 if (wanted & TX_CON_CLO_SET)
1704 txn->flags |= TX_CON_CLO_SET;
1705 else
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1706 http_remove_header2(msg, &txn->hdr_idx, &ctx);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]1707 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1708 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1709
1710 if (wanted == (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
1711 return;
1712
1713 if ((wanted & TX_CON_CLO_SET) && !(txn->flags & TX_CON_CLO_SET)) {
1714 txn->flags |= TX_CON_CLO_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1715 hdr_val = "Connection: close";
1716 hdr_len = 17;
1717 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1718 hdr_val = "Proxy-Connection: close";
1719 hdr_len = 23;
1720 }
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1721 http_header_add_tail2(msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1722 }
1723
1724 if ((wanted & TX_CON_KAL_SET) && !(txn->flags & TX_CON_KAL_SET)) {
1725 txn->flags |= TX_CON_KAL_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1726 hdr_val = "Connection: keep-alive";
1727 hdr_len = 22;
1728 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1729 hdr_val = "Proxy-Connection: keep-alive";
1730 hdr_len = 28;
1731 }
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]1732 http_header_add_tail2(msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1733 }
1734 return;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1735}
1736
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1737/* Parse the chunk size at msg->next. Once done, it adjusts ->next to point to the
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1738 * first byte of body, and increments msg->sov by the number of bytes parsed,
1739 * so that we know we can forward between ->som and ->sov. Note that due to
1740 * possible wrapping at the end of the buffer, it is possible that msg->sov is
1741 * lower than msg->som.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1742 * Return >0 on success, 0 when some data is missing, <0 on error.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1743 * Note: this function is designed to parse wrapped CRLF at the end of the buffer.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1744 */
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1745int http_parse_chunk_size(struct http_msg *msg)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1746{
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1747 const struct buffer *buf = msg->buf;
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]1748 const char *ptr = b_ptr(buf, msg->next);
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1749 const char *ptr_old = ptr;
1750 const char *end = buf->data + buf->size;
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]1751 const char *stop = bi_end(buf);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1752 unsigned int chunk = 0;
1753
1754 /* The chunk size is in the following form, though we are only
1755 * interested in the size and CRLF :
1756 * 1*HEXDIGIT *WSP *[ ';' extensions ] CRLF
1757 */
1758 while (1) {
1759 int c;
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1760 if (ptr == stop)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1761 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1762 c = hex2i(*ptr);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1763 if (c < 0) /* not a hex digit anymore */
1764 break;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1765 if (++ptr >= end)
1766 ptr = buf->data;
Willy Tarreau431946e2012-02-24 19:20:12 +0100[diff] [blame]1767 if (chunk & 0xF8000000) /* integer overflow will occur if result >= 2GB */
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1768 goto error;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1769 chunk = (chunk << 4) + c;
1770 }
1771
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1772 /* empty size not allowed */
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1773 if (ptr == ptr_old)
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1774 goto error;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1775
1776 while (http_is_spht[(unsigned char)*ptr]) {
1777 if (++ptr >= end)
1778 ptr = buf->data;
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1779 if (ptr == stop)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1780 return 0;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1781 }
1782
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1783 /* Up to there, we know that at least one byte is present at *ptr. Check
1784 * for the end of chunk size.
1785 */
1786 while (1) {
1787 if (likely(HTTP_IS_CRLF(*ptr))) {
1788 /* we now have a CR or an LF at ptr */
1789 if (likely(*ptr == '\r')) {
1790 if (++ptr >= end)
1791 ptr = buf->data;
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1792 if (ptr == stop)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1793 return 0;
1794 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1795
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1796 if (*ptr != '\n')
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1797 goto error;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1798 if (++ptr >= end)
1799 ptr = buf->data;
1800 /* done */
1801 break;
1802 }
1803 else if (*ptr == ';') {
1804 /* chunk extension, ends at next CRLF */
1805 if (++ptr >= end)
1806 ptr = buf->data;
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1807 if (ptr == stop)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1808 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1809
1810 while (!HTTP_IS_CRLF(*ptr)) {
1811 if (++ptr >= end)
1812 ptr = buf->data;
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1813 if (ptr == stop)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1814 return 0;
1815 }
1816 /* we have a CRLF now, loop above */
1817 continue;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1818 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1819 else
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1820 goto error;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1821 }
1822
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1823 /* OK we found our CRLF and now <ptr> points to the next byte,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1824 * which may or may not be present. We save that into ->next and
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1825 * ->sov.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1826 */
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1827 msg->sov += ptr - ptr_old;
1828 msg->next = buffer_count(buf, buf->p, ptr);
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]1829 msg->chunk_len = chunk;
1830 msg->body_len += chunk;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1831 msg->msg_state = chunk ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1832 return 1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1833 error:
1834 msg->err_pos = ptr - buf->data;
1835 return -1;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1836}
1837
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1838/* This function skips trailers in the buffer associated with HTTP
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1839 * message <msg>. The first visited position is msg->next. If the end of
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1840 * the trailers is found, it is automatically scheduled to be forwarded,
1841 * msg->msg_state switches to HTTP_MSG_DONE, and the function returns >0.
1842 * If not enough data are available, the function does not change anything
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1843 * except maybe msg->next and msg->sov if it could parse some lines, and returns
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1844 * zero. If a parse error is encountered, the function returns < 0 and does not
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1845 * change anything except maybe msg->next and msg->sov. Note that the message
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1846 * must already be in HTTP_MSG_TRAILERS state before calling this function,
1847 * which implies that all non-trailers data have already been scheduled for
1848 * forwarding, and that the difference between msg->som and msg->sov exactly
1849 * matches the length of trailers already parsed and not forwarded. It is also
1850 * important to note that this function is designed to be able to parse wrapped
1851 * headers at end of buffer.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1852 */
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1853int http_forward_trailers(struct http_msg *msg)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1854{
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1855 const struct buffer *buf = msg->buf;
1856
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1857 /* we have msg->next which points to next line. Look for CRLF. */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1858 while (1) {
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1859 const char *p1 = NULL, *p2 = NULL;
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]1860 const char *ptr = b_ptr(buf, msg->next);
1861 const char *stop = bi_end(buf);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1862 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1863
1864 /* scan current line and stop at LF or CRLF */
1865 while (1) {
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1866 if (ptr == stop)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1867 return 0;
1868
1869 if (*ptr == '\n') {
1870 if (!p1)
1871 p1 = ptr;
1872 p2 = ptr;
1873 break;
1874 }
1875
1876 if (*ptr == '\r') {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1877 if (p1) {
1878 msg->err_pos = ptr - buf->data;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1879 return -1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1880 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1881 p1 = ptr;
1882 }
1883
1884 ptr++;
1885 if (ptr >= buf->data + buf->size)
1886 ptr = buf->data;
1887 }
1888
1889 /* after LF; point to beginning of next line */
1890 p2++;
1891 if (p2 >= buf->data + buf->size)
1892 p2 = buf->data;
1893
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]1894 bytes = p2 - b_ptr(buf, msg->next);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1895 if (bytes < 0)
1896 bytes += buf->size;
1897
1898 /* schedule this line for forwarding */
1899 msg->sov += bytes;
1900 if (msg->sov >= buf->size)
1901 msg->sov -= buf->size;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1902
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]1903 if (p1 == b_ptr(buf, msg->next)) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1904 /* LF/CRLF at beginning of line => end of trailers at p2.
1905 * Everything was scheduled for forwarding, there's nothing
1906 * left from this message.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]1907 */
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1908 msg->next = buffer_count(buf, buf->p, p2);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1909 msg->msg_state = HTTP_MSG_DONE;
1910 return 1;
1911 }
1912 /* OK, next line then */
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1913 msg->next = buffer_count(buf, buf->p, p2);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1914 }
1915}
1916
1917/* This function may be called only in HTTP_MSG_DATA_CRLF. It reads the CRLF or
1918 * a possible LF alone at the end of a chunk. It automatically adjusts msg->sov,
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1919 * ->som, ->next in order to include this part into the next forwarding phase.
1920 * Note that the caller must ensure that ->p points to the first byte to parse.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1921 * It also sets msg_state to HTTP_MSG_CHUNK_SIZE and returns >0 on success. If
1922 * not enough data are available, the function does not change anything and
1923 * returns zero. If a parse error is encountered, the function returns < 0 and
1924 * does not change anything. Note: this function is designed to parse wrapped
1925 * CRLF at the end of the buffer.
1926 */
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1927int http_skip_chunk_crlf(struct http_msg *msg)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1928{
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]1929 const struct buffer *buf = msg->buf;
1930 const char *ptr;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1931 int bytes;
1932
1933 /* NB: we'll check data availabilty at the end. It's not a
1934 * problem because whatever we match first will be checked
1935 * against the correct length.
1936 */
1937 bytes = 1;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]1938 ptr = buf->p;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1939 if (*ptr == '\r') {
1940 bytes++;
1941 ptr++;
1942 if (ptr >= buf->data + buf->size)
1943 ptr = buf->data;
1944 }
1945
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]1946 if (bytes > buf->i)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1947 return 0;
1948
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1949 if (*ptr != '\n') {
1950 msg->err_pos = ptr - buf->data;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1951 return -1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]1952 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1953
1954 ptr++;
1955 if (ptr >= buf->data + buf->size)
1956 ptr = buf->data;
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]1957 /* prepare the CRLF to be forwarded (between ->som and ->sov) */
1958 msg->som = 0;
1959 msg->sov = msg->next = bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1960 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
1961 return 1;
1962}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1963
Willy Tarreau21710ff2012-03-09 13:58:04 +0100[diff] [blame]1964/* This function realigns a possibly wrapping http message at the beginning
1965 * of its buffer. The function may only be used when the buffer's tail is
1966 * empty.
1967 */
1968void http_message_realign(struct http_msg *msg)
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]1969{
Willy Tarreau21710ff2012-03-09 13:58:04 +0100[diff] [blame]1970 struct buffer *buf = msg->buf;
Willy Tarreau89fa7062012-03-02 16:13:16 +0100[diff] [blame]1971 int off = buf->data + buf->size - buf->p;
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]1972
1973 /* two possible cases :
1974 * - the buffer is in one contiguous block, we move it in-place
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]1975 * - the buffer is in two blocks, we move it via the swap_buffer
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]1976 */
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]1977 if (buf->i) {
1978 int block1 = buf->i;
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]1979 int block2 = 0;
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1980 if (buf->p + buf->i > buf->data + buf->size) {
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]1981 /* non-contiguous block */
Willy Tarreau89fa7062012-03-02 16:13:16 +0100[diff] [blame]1982 block1 = buf->data + buf->size - buf->p;
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]1983 block2 = buf->p + buf->i - (buf->data + buf->size);
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]1984 }
1985 if (block2)
1986 memcpy(swap_buffer, buf->data, block2);
Willy Tarreau89fa7062012-03-02 16:13:16 +0100[diff] [blame]1987 memmove(buf->data, buf->p, block1);
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]1988 if (block2)
1989 memcpy(buf->data + block1, swap_buffer, block2);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]1990 }
1991
1992 /* adjust all known pointers */
Willy Tarreau89fa7062012-03-02 16:13:16 +0100[diff] [blame]1993 buf->p = buf->data;
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]1994
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]1995 if (msg->err_pos >= 0) {
1996 msg->err_pos += off;
1997 if (msg->err_pos >= buf->size)
1998 msg->err_pos -= buf->size;
1999 }
2000
2001 buf->flags &= ~BF_FULL;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]2002 if (bi_full(buf))
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2003 buf->flags |= BF_FULL;
2004}
2005
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2006/* This stream analyser waits for a complete HTTP request. It returns 1 if the
2007 * processing can continue on next analysers, or zero if it either needs more
2008 * data or wants to immediately abort the request (eg: timeout, error, ...). It
2009 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
2010 * when it has nothing left to do, and may remove any analyser when it wants to
2011 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2012 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2013int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2014{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2015 /*
2016 * We will parse the partial (or complete) lines.
2017 * We will check the request syntax, and also join multi-line
2018 * headers. An index of all the lines will be elaborated while
2019 * parsing.
2020 *
2021 * For the parsing, we use a 28 states FSM.
2022 *
2023 * Here is the information we currently have :
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]2024 * req->p + msg->som = beginning of request
2025 * req->p + msg->eoh = end of processed headers / start of current one
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2026 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]2027 * msg->next = first non-visited byte
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2028 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2029 *
2030 * At end of parsing, we may perform a capture of the error (if any), and
2031 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
2032 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
2033 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2034 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2035
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2036 int cur_idx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2037 int use_close_only;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2038 struct http_txn *txn = &s->txn;
2039 struct http_msg *msg = &txn->req;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2040 struct hdr_ctx ctx;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2041
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]2042 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]2043 now_ms, __FUNCTION__,
2044 s,
2045 req,
2046 req->rex, req->wex,
2047 req->flags,
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]2048 req->i,
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]2049 req->analysers);
2050
Willy Tarreau52a0c602009-08-16 22:45:38 +0200[diff] [blame]2051 /* we're speaking HTTP here, so let's speak HTTP to the client */
2052 s->srv_error = http_return_srv_error;
2053
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2054 /* There's a protected area at the end of the buffer for rewriting
2055 * purposes. We don't want to start to parse the request if the
2056 * protected area is affected, because we may have to move processed
2057 * data later, which is much more complicated.
2058 */
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]2059 if (buffer_not_empty(req) && msg->msg_state < HTTP_MSG_ERROR) {
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2060 if ((txn->flags & TX_NOT_FIRST) &&
2061 unlikely((req->flags & BF_FULL) ||
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]2062 bi_end(req) < b_ptr(req, msg->next) ||
2063 bi_end(req) > req->data + req->size - global.tune.maxrewrite)) {
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]2064 if (req->o) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2065 if (req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2066 goto failed_keep_alive;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2067 /* some data has still not left the buffer, wake us once that's done */
2068 buffer_dont_connect(req);
2069 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
2070 return 0;
2071 }
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]2072 if (bi_end(req) < b_ptr(req, msg->next) ||
2073 bi_end(req) > req->data + req->size - global.tune.maxrewrite)
Willy Tarreau21710ff2012-03-09 13:58:04 +0100[diff] [blame]2074 http_message_realign(msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2075 }
2076
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2077 /* Note that we have the same problem with the response ; we
2078 * may want to send a redirect, error or anything which requires
2079 * some spare space. So we'll ensure that we have at least
2080 * maxrewrite bytes available in the response buffer before
2081 * processing that one. This will only affect pipelined
2082 * keep-alive requests.
2083 */
2084 if ((txn->flags & TX_NOT_FIRST) &&
2085 unlikely((s->rep->flags & BF_FULL) ||
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]2086 bi_end(s->rep) < b_ptr(s->rep, txn->rsp.next) ||
2087 bi_end(s->rep) > s->rep->data + s->rep->size - global.tune.maxrewrite)) {
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]2088 if (s->rep->o) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2089 if (s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2090 goto failed_keep_alive;
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2091 /* don't let a connection request be initiated */
2092 buffer_dont_connect(req);
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2093 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau0499e352010-12-17 07:13:42 +0100[diff] [blame]2094 s->rep->analysers |= an_bit; /* wake us up once it changes */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2095 return 0;
2096 }
2097 }
2098
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]2099 if (likely(msg->next < req->i)) /* some unparsed data are available */
Willy Tarreaua560c212012-03-09 13:50:57 +0100[diff] [blame]2100 http_msg_analyzer(msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2101 }
2102
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2103 /* 1: we might have to print this header in debug mode */
2104 if (unlikely((global.mode & MODE_DEBUG) &&
2105 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]2106 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2107 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2108 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2109
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]2110 sol = req->p + msg->som;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2111 eol = sol + msg->sl.rq.l;
2112 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2113
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2114 sol += hdr_idx_first_pos(&txn->hdr_idx);
2115 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2116
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2117 while (cur_idx) {
2118 eol = sol + txn->hdr_idx.v[cur_idx].len;
2119 debug_hdr("clihdr", s, sol, eol);
2120 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2121 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2122 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2123 }
2124
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2125
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2126 /*
2127 * Now we quickly check if we have found a full valid request.
2128 * If not so, we check the FD and buffer states before leaving.
2129 * A full request is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2130 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2131 * requests are checked first. When waiting for a second request
2132 * on a keep-alive session, if we encounter and error, close, t/o,
2133 * we note the error in the session flags but don't set any state.
2134 * Since the error will be noted there, it will not be counted by
2135 * process_session() as a frontend error.
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2136 * Last, we may increase some tracked counters' http request errors on
2137 * the cases that are deliberately the client's fault. For instance,
2138 * a timeout or connection reset is not counted as an error. However
2139 * a bad request is.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2140 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2141
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2142 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2143 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2144 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2145 */
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2146 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2147 session_inc_http_req_ctr(s);
2148 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2149 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2150 goto return_bad_req;
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2151 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2152
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2153 /* 1: Since we are in header mode, if there's no space
2154 * left for headers, we won't be able to free more
2155 * later, so the session will never terminate. We
2156 * must terminate it now.
2157 */
2158 if (unlikely(req->flags & BF_FULL)) {
2159 /* FIXME: check if URI is set and return Status
2160 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2161 */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2162 session_inc_http_req_ctr(s);
2163 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2164 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreaufec4d892011-09-02 20:04:57 +0200[diff] [blame]2165 if (msg->err_pos < 0)
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]2166 msg->err_pos = req->i;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2167 goto return_bad_req;
2168 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2169
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2170 /* 2: have we encountered a read error ? */
2171 else if (req->flags & BF_READ_ERROR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2172 if (!(s->flags & SN_ERR_MASK))
2173 s->flags |= SN_ERR_CLICL;
2174
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2175 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2176 goto failed_keep_alive;
2177
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2178 /* we cannot return any message on error */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2179 if (msg->err_pos >= 0) {
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]2180 http_capture_bad_message(&s->fe->invalid_req, s, msg, msg->msg_state, s->fe);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2181 session_inc_http_err_ctr(s);
2182 }
2183
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2184 msg->msg_state = HTTP_MSG_ERROR;
2185 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2186
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2187 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2188 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2189 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2190 if (s->listener->counters)
2191 s->listener->counters->failed_req++;
2192
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2193 if (!(s->flags & SN_FINST_MASK))
2194 s->flags |= SN_FINST_R;
2195 return 0;
2196 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2197
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2198 /* 3: has the read timeout expired ? */
2199 else if (req->flags & BF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2200 if (!(s->flags & SN_ERR_MASK))
2201 s->flags |= SN_ERR_CLITO;
2202
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2203 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2204 goto failed_keep_alive;
2205
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2206 /* read timeout : give up with an error message. */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2207 if (msg->err_pos >= 0) {
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]2208 http_capture_bad_message(&s->fe->invalid_req, s, msg, msg->msg_state, s->fe);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2209 session_inc_http_err_ctr(s);
2210 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2211 txn->status = 408;
2212 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
2213 msg->msg_state = HTTP_MSG_ERROR;
2214 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2215
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2216 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2217 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2218 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2219 if (s->listener->counters)
2220 s->listener->counters->failed_req++;
2221
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2222 if (!(s->flags & SN_FINST_MASK))
2223 s->flags |= SN_FINST_R;
2224 return 0;
2225 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2226
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2227 /* 4: have we encountered a close ? */
2228 else if (req->flags & BF_SHUTR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2229 if (!(s->flags & SN_ERR_MASK))
2230 s->flags |= SN_ERR_CLICL;
2231
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2232 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2233 goto failed_keep_alive;
2234
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2235 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]2236 http_capture_bad_message(&s->fe->invalid_req, s, msg, msg->msg_state, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2237 txn->status = 400;
2238 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2239 msg->msg_state = HTTP_MSG_ERROR;
2240 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2241
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2242 session_inc_http_err_ctr(s);
2243 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2244 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2245 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2246 if (s->listener->counters)
2247 s->listener->counters->failed_req++;
2248
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2249 if (!(s->flags & SN_FINST_MASK))
2250 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2251 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2252 }
2253
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2254 buffer_dont_connect(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2255 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2256 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau5e205522011-12-17 16:34:27 +0100[diff] [blame]2257#ifdef TCP_QUICKACK
2258 if (s->listener->options & LI_O_NOQUICKACK) {
2259 /* We need more data, we have to re-enable quick-ack in case we
2260 * previously disabled it, otherwise we might cause the client
2261 * to delay next data.
2262 */
2263 setsockopt(s->si[0].fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
2264 }
2265#endif
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2266
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2267 if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) {
2268 /* If the client starts to talk, let's fall back to
2269 * request timeout processing.
2270 */
2271 txn->flags &= ~TX_WAIT_NEXT_RQ;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2272 req->analyse_exp = TICK_ETERNITY;
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2273 }
2274
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2275 /* just set the request timeout once at the beginning of the request */
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2276 if (!tick_isset(req->analyse_exp)) {
2277 if ((msg->msg_state == HTTP_MSG_RQBEFORE) &&
2278 (txn->flags & TX_WAIT_NEXT_RQ) &&
2279 tick_isset(s->be->timeout.httpka))
2280 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
2281 else
2282 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
2283 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2284
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2285 /* we're not ready yet */
2286 return 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2287
2288 failed_keep_alive:
2289 /* Here we process low-level errors for keep-alive requests. In
2290 * short, if the request is not the first one and it experiences
2291 * a timeout, read error or shutdown, we just silently close so
2292 * that the client can try again.
2293 */
2294 txn->status = 0;
2295 msg->msg_state = HTTP_MSG_RQBEFORE;
2296 req->analysers = 0;
2297 s->logs.logwait = 0;
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2298 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]2299 stream_int_retnclose(req->prod, NULL);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2300 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2301 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2302
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2303 /* OK now we have a complete HTTP request with indexed headers. Let's
2304 * complete the request parsing by setting a few fields we will need
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]2305 * later. At this point, we have the last CRLF at req->data + msg->eoh.
2306 * If the request is in HTTP/0.9 form, the rule is still true, and eoh
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]2307 * points to the CRLF of the request line. msg->next points to the first
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]2308 * byte after the last LF. msg->sov points to the first byte of data.
2309 * msg->eol cannot be trusted because it may have been left uninitialized
2310 * (for instance in the absence of headers).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2311 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]2312
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2313 session_inc_http_req_ctr(s);
Willy Tarreaud9b587f2010-02-26 10:05:55 +0100[diff] [blame]2314 proxy_inc_fe_req_ctr(s->fe); /* one more valid request for this FE */
2315
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2316 if (txn->flags & TX_WAIT_NEXT_RQ) {
2317 /* kill the pending keep-alive timeout */
2318 txn->flags &= ~TX_WAIT_NEXT_RQ;
2319 req->analyse_exp = TICK_ETERNITY;
2320 }
2321
2322
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2323 /* Maybe we found in invalid header name while we were configured not
2324 * to block on that, so we have to capture it now.
2325 */
2326 if (unlikely(msg->err_pos >= 0))
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]2327 http_capture_bad_message(&s->fe->invalid_req, s, msg, msg->msg_state, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2328
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2329 /*
2330 * 1: identify the method
2331 */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2332 txn->meth = find_http_meth(req->p + msg->sol, msg->sl.rq.m_l);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2333
2334 /* we can make use of server redirect on GET and HEAD */
2335 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
2336 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2337
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2338 /*
2339 * 2: check if the URI matches the monitor_uri.
2340 * We have to do this for every request which gets in, because
2341 * the monitor-uri is defined by the frontend.
2342 */
2343 if (unlikely((s->fe->monitor_uri_len != 0) &&
2344 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2345 !memcmp(req->p + msg->sol + msg->sl.rq.u,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2346 s->fe->monitor_uri,
2347 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2348 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2349 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2350 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2351 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2352
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2353 s->flags |= SN_MONITOR;
Willy Tarreaueabea072011-09-10 23:29:44 +0200[diff] [blame]2354 s->fe->fe_counters.intercepted_req++;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2355
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2356 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2357 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
2358 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2359
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2360 ret = acl_pass(ret);
2361 if (cond->pol == ACL_COND_UNLESS)
2362 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2363
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2364 if (ret) {
2365 /* we fail this request, let's return 503 service unavail */
2366 txn->status = 503;
2367 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
2368 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2369 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2370 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]2371
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2372 /* nothing to fail, let's reply normaly */
2373 txn->status = 200;
Willy Tarreauae94d4d2011-05-11 16:28:49 +0200[diff] [blame]2374 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_200));
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2375 goto return_prx_cond;
2376 }
2377
2378 /*
2379 * 3: Maybe we have to copy the original REQURI for the logs ?
2380 * Note: we cannot log anymore if the request has been
2381 * classified as invalid.
2382 */
2383 if (unlikely(s->logs.logwait & LW_REQ)) {
2384 /* we have a complete HTTP request that we must log */
2385 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
2386 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2387
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2388 if (urilen >= REQURI_LEN)
2389 urilen = REQURI_LEN - 1;
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]2390 memcpy(txn->uri, &req->p[msg->som], urilen);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2391 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2392
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2393 if (!(s->logs.logwait &= ~LW_REQ))
2394 s->do_log(s);
2395 } else {
2396 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2397 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2398 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2399
William Lallemanda73203e2012-03-12 12:48:57 +0100[diff] [blame]2400 if (!LIST_ISEMPTY(&s->fe->format_unique_id)) {
2401 s->unique_id = pool_alloc2(pool2_uniqueid);
2402 }
2403
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2404 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau418bfcc2012-03-09 13:56:20 +0100[diff] [blame]2405 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(txn))
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]2406 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2407
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2408 /* ... and check if the request is HTTP/1.1 or above */
2409 if ((msg->sl.rq.v_l == 8) &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2410 ((req->p[msg->sol + msg->sl.rq.v + 5] > '1') ||
2411 ((req->p[msg->sol + msg->sl.rq.v + 5] == '1') &&
2412 (req->p[msg->sol + msg->sl.rq.v + 7] >= '1'))))
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2413 msg->flags |= HTTP_MSGF_VER_11;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2414
2415 /* "connection" has not been parsed yet */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2416 txn->flags &= ~(TX_HDR_CONN_PRS | TX_HDR_CONN_CLO | TX_HDR_CONN_KAL);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2417
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2418 /* if the frontend has "option http-use-proxy-header", we'll check if
2419 * we have what looks like a proxied connection instead of a connection,
2420 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
2421 * Note that this is *not* RFC-compliant, however browsers and proxies
2422 * happen to do that despite being non-standard :-(
2423 * We consider that a request not beginning with either '/' or '*' is
2424 * a proxied connection, which covers both "scheme://location" and
2425 * CONNECT ip:port.
2426 */
2427 if ((s->fe->options2 & PR_O2_USE_PXHDR) &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2428 req->p[msg->sol + msg->sl.rq.u] != '/' && req->p[msg->sol + msg->sl.rq.u] != '*')
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2429 txn->flags |= TX_USE_PX_CONN;
2430
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2431 /* transfer length unknown*/
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2432 msg->flags &= ~HTTP_MSGF_XFER_LEN;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2433
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2434 /* 5: we may need to capture headers */
Willy Tarreau42f7d892012-03-24 08:28:09 +0100[diff] [blame]2435 if (unlikely((s->logs.logwait & LW_REQHDR) && txn->req.cap))
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2436 capture_headers(req->p + msg->sol, &txn->hdr_idx,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2437 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2438
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2439 /* 6: determine the transfer-length.
2440 * According to RFC2616 #4.4, amended by the HTTPbis working group,
2441 * the presence of a message-body in a REQUEST and its transfer length
2442 * must be determined that way (in order of precedence) :
2443 * 1. The presence of a message-body in a request is signaled by the
2444 * inclusion of a Content-Length or Transfer-Encoding header field
2445 * in the request's header fields. When a request message contains
2446 * both a message-body of non-zero length and a method that does
2447 * not define any semantics for that request message-body, then an
2448 * origin server SHOULD either ignore the message-body or respond
2449 * with an appropriate error message (e.g., 413). A proxy or
2450 * gateway, when presented the same request, SHOULD either forward
2451 * the request inbound with the message- body or ignore the
2452 * message-body when determining a response.
2453 *
2454 * 2. If a Transfer-Encoding header field (Section 9.7) is present
2455 * and the "chunked" transfer-coding (Section 6.2) is used, the
2456 * transfer-length is defined by the use of this transfer-coding.
2457 * If a Transfer-Encoding header field is present and the "chunked"
2458 * transfer-coding is not present, the transfer-length is defined
2459 * by the sender closing the connection.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2460 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2461 * 3. If a Content-Length header field is present, its decimal value in
2462 * OCTETs represents both the entity-length and the transfer-length.
2463 * If a message is received with both a Transfer-Encoding header
2464 * field and a Content-Length header field, the latter MUST be ignored.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2465 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2466 * 4. By the server closing the connection. (Closing the connection
2467 * cannot be used to indicate the end of a request body, since that
2468 * would leave no possibility for the server to send back a response.)
2469 *
2470 * Whenever a transfer-coding is applied to a message-body, the set of
2471 * transfer-codings MUST include "chunked", unless the message indicates
2472 * it is terminated by closing the connection. When the "chunked"
2473 * transfer-coding is used, it MUST be the last transfer-coding applied
2474 * to the message-body.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2475 */
2476
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2477 use_close_only = 0;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2478 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2479 /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2480 while ((msg->flags & HTTP_MSGF_VER_11) &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2481 http_find_header2("Transfer-Encoding", 17, req->p + msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2482 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2483 msg->flags |= (HTTP_MSGF_TE_CHNK | HTTP_MSGF_XFER_LEN);
2484 else if (msg->flags & HTTP_MSGF_TE_CHNK) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2485 /* bad transfer-encoding (chunked followed by something else) */
2486 use_close_only = 1;
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2487 msg->flags &= ~(HTTP_MSGF_TE_CHNK | HTTP_MSGF_XFER_LEN);
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2488 break;
2489 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2490 }
2491
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2492 ctx.idx = 0;
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2493 while (!(msg->flags & HTTP_MSGF_TE_CHNK) && !use_close_only &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2494 http_find_header2("Content-Length", 14, req->p + msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2495 signed long long cl;
2496
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2497 if (!ctx.vlen) {
2498 msg->err_pos = ctx.line + ctx.val - req->data;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2499 goto return_bad_req;
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2500 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2501
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2502 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl)) {
2503 msg->err_pos = ctx.line + ctx.val - req->data;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2504 goto return_bad_req; /* parse failure */
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2505 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2506
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2507 if (cl < 0) {
2508 msg->err_pos = ctx.line + ctx.val - req->data;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2509 goto return_bad_req;
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2510 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2511
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2512 if ((msg->flags & HTTP_MSGF_CNT_LEN) && (msg->chunk_len != cl)) {
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2513 msg->err_pos = ctx.line + ctx.val - req->data;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2514 goto return_bad_req; /* already specified, was different */
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]2515 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2516
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2517 msg->flags |= HTTP_MSGF_CNT_LEN | HTTP_MSGF_XFER_LEN;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2518 msg->body_len = msg->chunk_len = cl;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2519 }
2520
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2521 /* bodyless requests have a known length */
2522 if (!use_close_only)
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2523 msg->flags |= HTTP_MSGF_XFER_LEN;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2524
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2525 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2526 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2527 req->analyse_exp = TICK_ETERNITY;
2528 return 1;
2529
2530 return_bad_req:
2531 /* We centralize bad requests processing here */
2532 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2533 /* we detected a parsing error. We want to archive this request
2534 * in the dedicated proxy area for later troubleshooting.
2535 */
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]2536 http_capture_bad_message(&s->fe->invalid_req, s, msg, msg->msg_state, s->fe);
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2537 }
2538
2539 txn->req.msg_state = HTTP_MSG_ERROR;
2540 txn->status = 400;
2541 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2542
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2543 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2544 if (s->listener->counters)
2545 s->listener->counters->failed_req++;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2546
2547 return_prx_cond:
2548 if (!(s->flags & SN_ERR_MASK))
2549 s->flags |= SN_ERR_PRXCOND;
2550 if (!(s->flags & SN_FINST_MASK))
2551 s->flags |= SN_FINST_R;
2552
2553 req->analysers = 0;
2554 req->analyse_exp = TICK_ETERNITY;
2555 return 0;
2556}
2557
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2558/* We reached the stats page through a POST request.
2559 * Parse the posted data and enable/disable servers if necessary.
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2560 * Returns 1 if request was parsed or zero if it needs more data.
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2561 */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2562int http_process_req_stat_post(struct stream_interface *si, struct http_txn *txn, struct buffer *req)
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2563{
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2564 struct proxy *px = NULL;
2565 struct server *sv = NULL;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2566
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2567 char key[LINESIZE];
2568 int action = ST_ADM_ACTION_NONE;
2569 int reprocess = 0;
2570
2571 int total_servers = 0;
2572 int altered_servers = 0;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2573
2574 char *first_param, *cur_param, *next_param, *end_params;
Willy Tarreau46787ed2012-04-11 17:28:40 +0200[diff] [blame]2575 char *st_cur_param = NULL;
2576 char *st_next_param = NULL;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2577
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]2578 first_param = req->p + txn->req.eoh + 2;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2579 end_params = first_param + txn->req.body_len;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2580
2581 cur_param = next_param = end_params;
2582
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2583 if (end_params >= req->data + req->size - global.tune.maxrewrite) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2584 /* Prevent buffer overflow */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2585 si->applet.ctx.stats.st_code = STAT_STATUS_EXCD;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2586 return 1;
2587 }
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]2588 else if (end_params > req->p + req->i) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2589 /* we need more data */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2590 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2591 return 0;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2592 }
2593
2594 *end_params = '\0';
2595
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2596 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2597
2598 /*
2599 * Parse the parameters in reverse order to only store the last value.
2600 * From the html form, the backend and the action are at the end.
2601 */
2602 while (cur_param > first_param) {
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2603 char *value;
2604 int poffset, plen;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2605
2606 cur_param--;
2607 if ((*cur_param == '&') || (cur_param == first_param)) {
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2608 reprocess_servers:
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2609 /* Parse the key */
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2610 poffset = (cur_param != first_param ? 1 : 0);
2611 plen = next_param - cur_param + (cur_param == first_param ? 1 : 0);
2612 if ((plen > 0) && (plen <= sizeof(key))) {
2613 strncpy(key, cur_param + poffset, plen);
2614 key[plen - 1] = '\0';
2615 } else {
2616 si->applet.ctx.stats.st_code = STAT_STATUS_EXCD;
2617 goto out;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2618 }
2619
2620 /* Parse the value */
2621 value = key;
2622 while (*value != '\0' && *value != '=') {
2623 value++;
2624 }
2625 if (*value == '=') {
2626 /* Ok, a value is found, we can mark the end of the key */
2627 *value++ = '\0';
2628 }
2629
Willy Tarreaubf9c2fc2011-05-31 18:06:18 +0200[diff] [blame]2630 if (!url_decode(key) || !url_decode(value))
2631 break;
2632
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2633 /* Now we can check the key to see what to do */
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2634 if (!px && (strcmp(key, "b") == 0)) {
2635 if ((px = findproxy(value, PR_CAP_BE)) == NULL) {
2636 /* the backend name is unknown or ambiguous (duplicate names) */
2637 si->applet.ctx.stats.st_code = STAT_STATUS_ERRP;
2638 goto out;
2639 }
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2640 }
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2641 else if (!action && (strcmp(key, "action") == 0)) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2642 if (strcmp(value, "disable") == 0) {
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2643 action = ST_ADM_ACTION_DISABLE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2644 }
2645 else if (strcmp(value, "enable") == 0) {
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2646 action = ST_ADM_ACTION_ENABLE;
2647 }
2648 else {
2649 si->applet.ctx.stats.st_code = STAT_STATUS_ERRP;
2650 goto out;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2651 }
2652 }
2653 else if (strcmp(key, "s") == 0) {
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2654 if (!(px && action)) {
2655 /*
2656 * Indicates that we'll need to reprocess the parameters
2657 * as soon as backend and action are known
2658 */
2659 if (!reprocess) {
2660 st_cur_param = cur_param;
2661 st_next_param = next_param;
2662 }
2663 reprocess = 1;
2664 }
2665 else if ((sv = findserver(px, value)) != NULL) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2666 switch (action) {
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2667 case ST_ADM_ACTION_DISABLE:
Cyril Bonté1e2a1702011-03-03 21:05:17 +0100[diff] [blame]2668 if ((px->state != PR_STSTOPPED) && !(sv->state & SRV_MAINTAIN)) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2669 /* Not already in maintenance, we can change the server state */
2670 sv->state |= SRV_MAINTAIN;
2671 set_server_down(sv);
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2672 altered_servers++;
2673 total_servers++;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2674 }
2675 break;
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2676 case ST_ADM_ACTION_ENABLE:
Cyril Bonté1e2a1702011-03-03 21:05:17 +0100[diff] [blame]2677 if ((px->state != PR_STSTOPPED) && (sv->state & SRV_MAINTAIN)) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2678 /* Already in maintenance, we can change the server state */
2679 set_server_up(sv);
Willy Tarreau70461302010-10-22 14:39:02 +0200[diff] [blame]2680 sv->health = sv->rise; /* up, but will fall down at first failure */
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2681 altered_servers++;
2682 total_servers++;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2683 }
2684 break;
2685 }
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2686 } else {
2687 /* the server name is unknown or ambiguous (duplicate names) */
2688 total_servers++;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2689 }
2690 }
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2691 if (reprocess && px && action) {
2692 /* Now, we know the backend and the action chosen by the user.
2693 * We can safely restart from the first server parameter
2694 * to reprocess them
2695 */
2696 cur_param = st_cur_param;
2697 next_param = st_next_param;
2698 reprocess = 0;
2699 goto reprocess_servers;
2700 }
2701
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2702 next_param = cur_param;
2703 }
2704 }
Cyril Bontécf8d9ae2012-04-04 12:57:18 +0200[diff] [blame]2705
2706 if (total_servers == 0) {
2707 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
2708 }
2709 else if (altered_servers == 0) {
2710 si->applet.ctx.stats.st_code = STAT_STATUS_ERRP;
2711 }
2712 else if (altered_servers == total_servers) {
2713 si->applet.ctx.stats.st_code = STAT_STATUS_DONE;
2714 }
2715 else {
2716 si->applet.ctx.stats.st_code = STAT_STATUS_PART;
2717 }
2718 out:
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2719 return 1;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2720}
2721
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2722/* returns a pointer to the first rule which forbids access (deny or http_auth),
2723 * or NULL if everything's OK.
2724 */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2725static inline struct http_req_rule *
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2726http_check_access_rule(struct proxy *px, struct list *rules, struct session *s, struct http_txn *txn)
2727{
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2728 struct http_req_rule *rule;
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2729
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2730 list_for_each_entry(rule, rules, list) {
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2731 int ret = 1;
2732
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2733 if (rule->action >= HTTP_REQ_ACT_MAX)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2734 continue;
2735
2736 /* check condition, but only if attached */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2737 if (rule->cond) {
2738 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2739 ret = acl_pass(ret);
2740
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2741 if (rule->cond->pol == ACL_COND_UNLESS)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2742 ret = !ret;
2743 }
2744
2745 if (ret) {
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2746 if (rule->action == HTTP_REQ_ACT_ALLOW)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2747 return NULL; /* no problem */
2748 else
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2749 return rule; /* most likely a deny or auth rule */
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2750 }
2751 }
2752 return NULL;
2753}
2754
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2755/* This stream analyser runs all HTTP request processing which is common to
2756 * frontends and backends, which means blocking ACLs, filters, connection-close,
2757 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2758 * It returns 1 if the processing can continue on next analysers, or zero if it
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2759 * either needs more data or wants to immediately abort the request (eg: deny,
2760 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2761 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2762int http_process_req_common(struct session *s, struct buffer *req, int an_bit, struct proxy *px)
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2763{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2764 struct http_txn *txn = &s->txn;
2765 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2766 struct acl_cond *cond;
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2767 struct http_req_rule *http_req_last_rule = NULL;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2768 struct redirect_rule *rule;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]2769 struct cond_wordlist *wl;
Simon Horman70735c92011-06-07 11:07:50 +0900[diff] [blame]2770 int do_stats;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2771
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2772 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2773 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2774 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2775 return 0;
2776 }
2777
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2778 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2779 req->analyse_exp = TICK_ETERNITY;
2780
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]2781 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2782 now_ms, __FUNCTION__,
2783 s,
2784 req,
2785 req->rex, req->wex,
2786 req->flags,
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]2787 req->i,
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2788 req->analysers);
2789
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2790 /* first check whether we have some ACLs set to block this request */
2791 list_for_each_entry(cond, &px->block_cond, list) {
2792 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]2793
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2794 ret = acl_pass(ret);
2795 if (cond->pol == ACL_COND_UNLESS)
2796 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]2797
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2798 if (ret) {
2799 txn->status = 403;
2800 /* let's log the request time */
2801 s->logs.tv_request = now;
2802 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2803 session_inc_http_err_ctr(s);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2804 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2805 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2806 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2807
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2808 /* evaluate http-request rules */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2809 http_req_last_rule = http_check_access_rule(px, &px->http_req_rules, s, txn);
Willy Tarreau51425942010-02-01 10:40:19 +0100[diff] [blame]2810
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2811 /* evaluate stats http-request rules only if http-request is OK */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2812 if (!http_req_last_rule) {
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2813 do_stats = stats_check_uri(s->rep->prod, txn, px);
2814 if (do_stats)
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2815 http_req_last_rule = http_check_access_rule(px, &px->uri_auth->http_req_rules, s, txn);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2816 }
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2817 else
2818 do_stats = 0;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2819
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2820 /* return a 403 if either rule has blocked */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2821 if (http_req_last_rule && http_req_last_rule->action == HTTP_REQ_ACT_DENY) {
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2822 txn->status = 403;
2823 s->logs.tv_request = now;
2824 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2825 session_inc_http_err_ctr(s);
Willy Tarreau6da0f6d2011-01-06 18:19:50 +0100[diff] [blame]2826 s->fe->fe_counters.denied_req++;
2827 if (an_bit == AN_REQ_HTTP_PROCESS_BE)
2828 s->be->be_counters.denied_req++;
2829 if (s->listener->counters)
2830 s->listener->counters->denied_req++;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2831 goto return_prx_cond;
2832 }
2833
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2834 /* try headers filters */
2835 if (px->req_exp != NULL) {
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]2836 if (apply_filters_to_request(s, req, px) < 0)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2837 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2838
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2839 /* has the request been denied ? */
2840 if (txn->flags & TX_CLDENY) {
2841 /* no need to go further */
2842 txn->status = 403;
2843 /* let's log the request time */
2844 s->logs.tv_request = now;
2845 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2846 session_inc_http_err_ctr(s);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2847 goto return_prx_cond;
2848 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2849
2850 /* When a connection is tarpitted, we use the tarpit timeout,
2851 * which may be the same as the connect timeout if unspecified.
2852 * If unset, then set it to zero because we really want it to
2853 * eventually expire. We build the tarpit as an analyser.
2854 */
2855 if (txn->flags & TX_CLTARPIT) {
2856 buffer_erase(s->req);
2857 /* wipe the request out so that we can drop the connection early
2858 * if the client closes first.
2859 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2860 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2861 req->analysers = 0; /* remove switching rules etc... */
2862 req->analysers |= AN_REQ_HTTP_TARPIT;
2863 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
2864 if (!req->analyse_exp)
2865 req->analyse_exp = tick_add(now_ms, 0);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2866 session_inc_http_err_ctr(s);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2867 return 1;
2868 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2869 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2870
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2871 /* Until set to anything else, the connection mode is set as TUNNEL. It will
2872 * only change if both the request and the config reference something else.
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2873 * Option httpclose by itself does not set a mode, it remains a tunnel mode
2874 * in which headers are mangled. However, if another mode is set, it will
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2875 * affect it (eg: server-close/keep-alive + httpclose = close). Note that we
2876 * avoid to redo the same work if FE and BE have the same settings (common).
2877 * The method consists in checking if options changed between the two calls
2878 * (implying that either one is non-null, or one of them is non-null and we
2879 * are there for the first time.
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2880 */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2881
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]2882 if ((!(txn->flags & TX_HDR_CONN_PRS) &&
2883 (s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) ||
2884 ((s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) !=
2885 (s->be->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)))) {
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2886 int tmp = TX_CON_WANT_TUN;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2887
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]2888 if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE ||
2889 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2890 tmp = TX_CON_WANT_KAL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2891 if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO)
2892 tmp = TX_CON_WANT_SCL;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2893 if ((s->fe->options|s->be->options) & PR_O_FORCE_CLO)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2894 tmp = TX_CON_WANT_CLO;
2895
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2896 if ((txn->flags & TX_CON_WANT_MSK) < tmp)
2897 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2898
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2899 if (!(txn->flags & TX_HDR_CONN_PRS)) {
2900 /* parse the Connection header and possibly clean it */
2901 int to_del = 0;
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2902 if ((msg->flags & HTTP_MSGF_VER_11) ||
Willy Tarreau8a8e1d92010-04-05 16:15:16 +0200[diff] [blame]2903 ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL &&
2904 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2905 to_del |= 2; /* remove "keep-alive" */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2906 if (!(msg->flags & HTTP_MSGF_VER_11))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2907 to_del |= 1; /* remove "close" */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]2908 http_parse_connection_header(txn, msg, to_del);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2909 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2910
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2911 /* check if client or config asks for explicit close in KAL/SCL */
2912 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
2913 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
2914 ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2915 (!(msg->flags & HTTP_MSGF_VER_11) && !(txn->flags & TX_HDR_CONN_KAL)) || /* no "connection: k-a" in 1.0 */
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]2916 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) || /* httpclose+any = forceclose */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2917 !(msg->flags & HTTP_MSGF_XFER_LEN) || /* no length known => close */
Willy Tarreauc3e8b252010-01-28 15:01:20 +0100[diff] [blame]2918 s->fe->state == PR_STSTOPPED)) /* frontend is stopping */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2919 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
2920 }
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2921
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2922 /* we can be blocked here because the request needs to be authenticated,
2923 * either to pass or to access stats.
2924 */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2925 if (http_req_last_rule && http_req_last_rule->action == HTTP_REQ_ACT_HTTP_AUTH) {
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2926 struct chunk msg;
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2927 char *realm = http_req_last_rule->http_auth.realm;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2928
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2929 if (!realm)
2930 realm = do_stats?STATS_DEFAULT_REALM:px->id;
2931
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]2932 sprintf(trash, (txn->flags & TX_USE_PX_CONN) ? HTTP_407_fmt : HTTP_401_fmt, realm);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2933 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
2934 txn->status = 401;
2935 stream_int_retnclose(req->prod, &msg);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2936 /* on 401 we still count one error, because normal browsing
2937 * won't significantly increase the counter but brute force
2938 * attempts will.
2939 */
2940 session_inc_http_err_ctr(s);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2941 goto return_prx_cond;
2942 }
2943
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2944 /* add request headers from the rule sets in the same order */
2945 list_for_each_entry(wl, &px->req_add, list) {
2946 if (wl->cond) {
2947 int ret = acl_exec_cond(wl->cond, px, s, txn, ACL_DIR_REQ);
2948 ret = acl_pass(ret);
2949 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
2950 ret = !ret;
2951 if (!ret)
2952 continue;
2953 }
2954
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]2955 if (unlikely(http_header_add_tail(&txn->req, &txn->hdr_idx, wl->s) < 0))
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2956 goto return_bad_req;
2957 }
2958
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2959 if (do_stats) {
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]2960 struct stats_admin_rule *stats_admin_rule;
2961
2962 /* We need to provide stats for this request.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2963 * FIXME!!! that one is rather dangerous, we want to
2964 * make it follow standard rules (eg: clear req->analysers).
2965 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2966
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]2967 /* now check whether we have some admin rules for this request */
2968 list_for_each_entry(stats_admin_rule, &s->be->uri_auth->admin_rules, list) {
2969 int ret = 1;
2970
2971 if (stats_admin_rule->cond) {
2972 ret = acl_exec_cond(stats_admin_rule->cond, s->be, s, &s->txn, ACL_DIR_REQ);
2973 ret = acl_pass(ret);
2974 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
2975 ret = !ret;
2976 }
2977
2978 if (ret) {
2979 /* no rule, or the rule matches */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2980 s->rep->prod->applet.ctx.stats.flags |= STAT_ADMIN;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]2981 break;
2982 }
2983 }
2984
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2985 /* Was the status page requested with a POST ? */
2986 if (txn->meth == HTTP_METH_POST) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2987 if (s->rep->prod->applet.ctx.stats.flags & STAT_ADMIN) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2988 if (msg->msg_state < HTTP_MSG_100_SENT) {
2989 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
2990 * send an HTTP/1.1 100 Continue intermediate response.
2991 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]2992 if (msg->flags & HTTP_MSGF_VER_11) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2993 struct hdr_ctx ctx;
2994 ctx.idx = 0;
2995 /* Expect is allowed in 1.1, look for it */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]2996 if (http_find_header2("Expect", 6, req->p + msg->sol, &txn->hdr_idx, &ctx) &&
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2997 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]2998 bo_inject(s->rep, http_100_chunk.str, http_100_chunk.len);
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2999 }
3000 }
3001 msg->msg_state = HTTP_MSG_100_SENT;
3002 s->logs.tv_request = now; /* update the request timer to reflect full request */
3003 }
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3004 if (!http_process_req_stat_post(s->rep->prod, txn, req)) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]3005 /* we need more data */
3006 req->analysers |= an_bit;
3007 buffer_dont_connect(req);
3008 return 0;
3009 }
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3010 } else {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3011 s->rep->prod->applet.ctx.stats.st_code = STAT_STATUS_DENY;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3012 }
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]3013 }
3014
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3015 s->logs.tv_request = now;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3016 s->task->nice = -32; /* small boost for HTTP statistics */
Willy Tarreaub24281b2011-02-13 13:16:36 +0100[diff] [blame]3017 stream_int_register_handler(s->rep->prod, &http_stats_applet);
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]3018 copy_target(&s->target, &s->rep->prod->target); // for logging only
Willy Tarreaubc4af052011-02-13 13:25:14 +0100[diff] [blame]3019 s->rep->prod->applet.private = s;
3020 s->rep->prod->applet.st0 = s->rep->prod->applet.st1 = 0;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3021 req->analysers = 0;
Willy Tarreaueabea072011-09-10 23:29:44 +0200[diff] [blame]3022 if (s->fe == s->be) /* report it if the request was intercepted by the frontend */
3023 s->fe->fe_counters.intercepted_req++;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3024
3025 return 0;
3026
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3027 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3028
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3029 /* check whether we have some ACLs set to redirect this request */
3030 list_for_each_entry(rule, &px->redirect_rules, list) {
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3031 int ret = ACL_PAT_PASS;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3032
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3033 if (rule->cond) {
3034 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
3035 ret = acl_pass(ret);
3036 if (rule->cond->pol == ACL_COND_UNLESS)
3037 ret = !ret;
3038 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3039
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3040 if (ret) {
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3041 struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 };
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3042 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3043
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3044 /* build redirect message */
3045 switch(rule->code) {
3046 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3047 msg_fmt = HTTP_303;
3048 break;
3049 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3050 msg_fmt = HTTP_301;
3051 break;
3052 case 302:
3053 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3054 msg_fmt = HTTP_302;
3055 break;
3056 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3057
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3058 if (unlikely(!chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3059 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3060
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3061 switch(rule->type) {
3062 case REDIRECT_TYPE_PREFIX: {
3063 const char *path;
3064 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3065
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3066 path = http_get_path(txn);
3067 /* build message using path */
3068 if (path) {
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]3069 pathlen = txn->req.sl.rq.u_l + (req->p + txn->req.sol + txn->req.sl.rq.u) - path;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3070 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
3071 int qs = 0;
3072 while (qs < pathlen) {
3073 if (path[qs] == '?') {
3074 pathlen = qs;
3075 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3076 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3077 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3078 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3079 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3080 } else {
3081 path = "/";
3082 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3083 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3084
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3085 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3086 goto return_bad_req;
3087
3088 /* add prefix. Note that if prefix == "/", we don't want to
3089 * add anything, otherwise it makes it hard for the user to
3090 * configure a self-redirection.
3091 */
3092 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3093 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3094 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3095 }
3096
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3097 /* add path */
3098 memcpy(rdr.str + rdr.len, path, pathlen);
3099 rdr.len += pathlen;
Willy Tarreau81e3b4f2010-01-10 00:42:19 +0100[diff] [blame]3100
3101 /* append a slash at the end of the location is needed and missing */
3102 if (rdr.len && rdr.str[rdr.len - 1] != '/' &&
3103 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
3104 if (rdr.len > rdr.size - 5)
3105 goto return_bad_req;
3106 rdr.str[rdr.len] = '/';
3107 rdr.len++;
3108 }
3109
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3110 break;
3111 }
3112 case REDIRECT_TYPE_LOCATION:
3113 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3114 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3115 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3116
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3117 /* add location */
3118 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3119 rdr.len += rule->rdr_len;
3120 break;
3121 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3122
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3123 if (rule->cookie_len) {
3124 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
3125 rdr.len += 14;
3126 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
3127 rdr.len += rule->cookie_len;
3128 memcpy(rdr.str + rdr.len, "\r\n", 2);
3129 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3130 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3131
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3132 /* add end of headers and the keep-alive/close status.
3133 * We may choose to set keep-alive if the Location begins
3134 * with a slash, because the client will come back to the
3135 * same server.
3136 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3137 txn->status = rule->code;
3138 /* let's log the request time */
3139 s->logs.tv_request = now;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3140
3141 if (rule->rdr_len >= 1 && *rule->rdr_str == '/' &&
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3142 (msg->flags & HTTP_MSGF_XFER_LEN) &&
3143 !(msg->flags & HTTP_MSGF_TE_CHNK) && !txn->req.body_len &&
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3144 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
3145 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
3146 /* keep-alive possible */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3147 if (!(msg->flags & HTTP_MSGF_VER_11)) {
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3148 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3149 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: keep-alive", 30);
3150 rdr.len += 30;
3151 } else {
3152 memcpy(rdr.str + rdr.len, "\r\nConnection: keep-alive", 24);
3153 rdr.len += 24;
3154 }
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3155 }
3156 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
3157 rdr.len += 4;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]3158 bo_inject(req->prod->ob, rdr.str, rdr.len);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3159 /* "eat" the request */
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]3160 bi_fast_delete(req, msg->sov - msg->som);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3161 msg->som = msg->sov;
3162 req->analysers = AN_REQ_HTTP_XFER_BODY;
Willy Tarreau9300fb22010-01-05 00:58:24 +0100[diff] [blame]3163 s->rep->analysers = AN_RES_HTTP_XFER_BODY;
3164 txn->req.msg_state = HTTP_MSG_CLOSED;
3165 txn->rsp.msg_state = HTTP_MSG_DONE;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3166 break;
3167 } else {
3168 /* keep-alive not possible */
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3169 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3170 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
3171 rdr.len += 29;
3172 } else {
3173 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
3174 rdr.len += 23;
3175 }
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]3176 stream_int_retnclose(req->prod, &rdr);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3177 goto return_prx_cond;
3178 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3179 }
3180 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3181
Willy Tarreau2be39392010-01-03 17:24:51 +0100[diff] [blame]3182 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
3183 * If this happens, then the data will not come immediately, so we must
3184 * send all what we have without waiting. Note that due to the small gain
3185 * in waiting for the body of the request, it's easier to simply put the
3186 * BF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
3187 * itself once used.
3188 */
3189 req->flags |= BF_SEND_DONTWAIT;
3190
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3191 /* that's OK for us now, let's move on to next analysers */
3192 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]3193
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3194 return_bad_req:
3195 /* We centralize bad requests processing here */
3196 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
3197 /* we detected a parsing error. We want to archive this request
3198 * in the dedicated proxy area for later troubleshooting.
3199 */
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]3200 http_capture_bad_message(&s->fe->invalid_req, s, msg, msg->msg_state, s->fe);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3201 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3202
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3203 txn->req.msg_state = HTTP_MSG_ERROR;
3204 txn->status = 400;
3205 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3206
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3207 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3208 if (s->listener->counters)
3209 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]3210
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3211 return_prx_cond:
3212 if (!(s->flags & SN_ERR_MASK))
3213 s->flags |= SN_ERR_PRXCOND;
3214 if (!(s->flags & SN_FINST_MASK))
3215 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]3216
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3217 req->analysers = 0;
3218 req->analyse_exp = TICK_ETERNITY;
3219 return 0;
3220}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3221
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3222/* This function performs all the processing enabled for the current request.
3223 * It returns 1 if the processing can continue on next analysers, or zero if it
3224 * needs more data, encounters an error, or wants to immediately abort the
3225 * request. It relies on buffers flags, and updates s->req->analysers.
3226 */
3227int http_process_request(struct session *s, struct buffer *req, int an_bit)
3228{
3229 struct http_txn *txn = &s->txn;
3230 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3231
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3232 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3233 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3234 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3235 return 0;
3236 }
3237
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]3238 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3239 now_ms, __FUNCTION__,
3240 s,
3241 req,
3242 req->rex, req->wex,
3243 req->flags,
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]3244 req->i,
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3245 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3246
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3247 /*
3248 * Right now, we know that we have processed the entire headers
3249 * and that unwanted requests have been filtered out. We can do
3250 * whatever we want with the remaining request. Also, now we
3251 * may have separate values for ->fe, ->be.
3252 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3253
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3254 /*
3255 * If HTTP PROXY is set we simply get remote server address
3256 * parsing incoming request.
3257 */
3258 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]3259 url2sa(req->p + msg->sol + msg->sl.rq.u, msg->sl.rq.u_l, &s->req->cons->addr.to);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3260 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3261
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3262 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3263 * 7: Now we can work with the cookies.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3264 * Note that doing so might move headers in the request, but
3265 * the fields will stay coherent and the URI will not move.
3266 * This should only be performed in the backend.
3267 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]3268 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3269 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
3270 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]3271
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3272 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3273 * 8: the appsession cookie was looked up very early in 1.2,
3274 * so let's do the same now.
3275 */
3276
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]3277 /* It needs to look into the URI unless persistence must be ignored */
3278 if ((txn->sessid == NULL) && s->be->appsession_name && !(s->flags & SN_IGNORE_PRST)) {
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]3279 get_srv_from_appsession(s, req->p + msg->sol + msg->sl.rq.u, msg->sl.rq.u_l);
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3280 }
3281
William Lallemanda73203e2012-03-12 12:48:57 +0100[diff] [blame]3282 /* add unique-id if "header-unique-id" is specified */
3283
3284 if (!LIST_ISEMPTY(&s->fe->format_unique_id))
3285 build_logline(s, s->unique_id, UNIQUEID_LEN, &s->fe->format_unique_id);
3286
3287 if (s->fe->header_unique_id && s->unique_id) {
3288 int ret = snprintf(trash, global.tune.bufsize, "%s: %s", s->fe->header_unique_id, s->unique_id);
3289 if (ret < 0 || ret > global.tune.bufsize)
3290 goto return_bad_req;
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]3291 if (unlikely(http_header_add_tail(&txn->req, &txn->hdr_idx, trash) < 0))
William Lallemanda73203e2012-03-12 12:48:57 +0100[diff] [blame]3292 goto return_bad_req;
3293 }
3294
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3295 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3296 * 9: add X-Forwarded-For if either the frontend or the backend
3297 * asks for it.
3298 */
3299 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
Willy Tarreau87cf5142011-08-19 22:57:24 +0200[diff] [blame]3300 struct hdr_ctx ctx = { .idx = 0 };
3301
3302 if (!((s->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]3303 http_find_header2(s->be->fwdfor_hdr_name, s->be->fwdfor_hdr_len, req->p + txn->req.sol, &txn->hdr_idx, &ctx)) {
Willy Tarreau87cf5142011-08-19 22:57:24 +0200[diff] [blame]3304 /* The header is set to be added only if none is present
3305 * and we found it, so don't do anything.
3306 */
3307 }
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3308 else if (s->req->prod->addr.from.ss_family == AF_INET) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3309 /* Add an X-Forwarded-For header unless the source IP is
3310 * in the 'except' network range.
3311 */
3312 if ((!s->fe->except_mask.s_addr ||
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3313 (((struct sockaddr_in *)&s->req->prod->addr.from)->sin_addr.s_addr & s->fe->except_mask.s_addr)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3314 != s->fe->except_net.s_addr) &&
3315 (!s->be->except_mask.s_addr ||
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3316 (((struct sockaddr_in *)&s->req->prod->addr.from)->sin_addr.s_addr & s->be->except_mask.s_addr)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3317 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3318 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3319 unsigned char *pn;
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3320 pn = (unsigned char *)&((struct sockaddr_in *)&s->req->prod->addr.from)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3321
3322 /* Note: we rely on the backend to get the header name to be used for
3323 * x-forwarded-for, because the header is really meant for the backends.
3324 * However, if the backend did not specify any option, we have to rely
3325 * on the frontend's header name.
3326 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3327 if (s->be->fwdfor_hdr_len) {
3328 len = s->be->fwdfor_hdr_len;
3329 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3330 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3331 len = s->fe->fwdfor_hdr_len;
3332 memcpy(trash, s->fe->fwdfor_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3333 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3334 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
Willy Tarreauedcf6682008-11-30 23:15:34 +0100[diff] [blame]3335
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]3336 if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash, len) < 0))
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3337 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3338 }
3339 }
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3340 else if (s->req->prod->addr.from.ss_family == AF_INET6) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3341 /* FIXME: for the sake of completeness, we should also support
3342 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3343 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3344 int len;
3345 char pn[INET6_ADDRSTRLEN];
3346 inet_ntop(AF_INET6,
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3347 (const void *)&((struct sockaddr_in6 *)(&s->req->prod->addr.from))->sin6_addr,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3348 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3349
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3350 /* Note: we rely on the backend to get the header name to be used for
3351 * x-forwarded-for, because the header is really meant for the backends.
3352 * However, if the backend did not specify any option, we have to rely
3353 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3354 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3355 if (s->be->fwdfor_hdr_len) {
3356 len = s->be->fwdfor_hdr_len;
3357 memcpy(trash, s->be->fwdfor_hdr_name, len);
3358 } else {
3359 len = s->fe->fwdfor_hdr_len;
3360 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3361 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3362 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3363
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]3364 if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash, len) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3365 goto return_bad_req;
3366 }
3367 }
3368
3369 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3370 * 10: add X-Original-To if either the frontend or the backend
3371 * asks for it.
3372 */
3373 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
3374
3375 /* FIXME: don't know if IPv6 can handle that case too. */
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3376 if (s->req->prod->addr.from.ss_family == AF_INET) {
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3377 /* Add an X-Original-To header unless the destination IP is
3378 * in the 'except' network range.
3379 */
Willy Tarreau9b061e32012-04-07 18:03:52 +0200[diff] [blame]3380 stream_sock_get_to_addr(s->req->prod);
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3381
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3382 if (s->req->prod->addr.to.ss_family == AF_INET &&
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]3383 ((!s->fe->except_mask_to.s_addr ||
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3384 (((struct sockaddr_in *)&s->req->prod->addr.to)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]3385 != s->fe->except_to.s_addr) &&
3386 (!s->be->except_mask_to.s_addr ||
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3387 (((struct sockaddr_in *)&s->req->prod->addr.to)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]3388 != s->be->except_to.s_addr))) {
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3389 int len;
3390 unsigned char *pn;
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]3391 pn = (unsigned char *)&((struct sockaddr_in *)&s->req->prod->addr.to)->sin_addr;
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3392
3393 /* Note: we rely on the backend to get the header name to be used for
3394 * x-original-to, because the header is really meant for the backends.
3395 * However, if the backend did not specify any option, we have to rely
3396 * on the frontend's header name.
3397 */
3398 if (s->be->orgto_hdr_len) {
3399 len = s->be->orgto_hdr_len;
3400 memcpy(trash, s->be->orgto_hdr_name, len);
3401 } else {
3402 len = s->fe->orgto_hdr_len;
3403 memcpy(trash, s->fe->orgto_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3404 }
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3405 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
3406
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]3407 if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash, len) < 0))
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3408 goto return_bad_req;
3409 }
3410 }
3411 }
3412
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3413 /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set. */
3414 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]3415 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3416 unsigned int want_flags = 0;
3417
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3418 if (msg->flags & HTTP_MSGF_VER_11) {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3419 if (((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL ||
3420 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) &&
3421 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3422 want_flags |= TX_CON_CLO_SET;
3423 } else {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3424 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL &&
3425 !((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) ||
3426 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3427 want_flags |= TX_CON_KAL_SET;
3428 }
3429
3430 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]3431 http_change_connection_header(txn, msg, want_flags);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3432 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3433
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3434
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3435 /* If we have no server assigned yet and we're balancing on url_param
3436 * with a POST request, we may be interested in checking the body for
3437 * that parameter. This will be done in another analyser.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3438 */
3439 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
3440 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3441 s->be->url_param_post_limit != 0 &&
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3442 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3443 buffer_dont_connect(req);
3444 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3445 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3446
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3447 if (msg->flags & HTTP_MSGF_XFER_LEN) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3448 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau5e205522011-12-17 16:34:27 +0100[diff] [blame]3449#ifdef TCP_QUICKACK
3450 /* We expect some data from the client. Unless we know for sure
3451 * we already have a full request, we have to re-enable quick-ack
3452 * in case we previously disabled it, otherwise we might cause
3453 * the client to delay further data.
3454 */
3455 if ((s->listener->options & LI_O_NOQUICKACK) &&
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3456 ((msg->flags & HTTP_MSGF_TE_CHNK) ||
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]3457 (msg->body_len > req->i - txn->req.eoh - 2)))
Willy Tarreau5e205522011-12-17 16:34:27 +0100[diff] [blame]3458 setsockopt(s->si[0].fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
3459#endif
3460 }
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]3461
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3462 /*************************************************************
3463 * OK, that's finished for the headers. We have done what we *
3464 * could. Let's switch to the DATA state. *
3465 ************************************************************/
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3466 req->analyse_exp = TICK_ETERNITY;
3467 req->analysers &= ~an_bit;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3468
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3469 s->logs.tv_request = now;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3470 /* OK let's go on with the BODY now */
3471 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3472
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3473 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3474 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3475 /* we detected a parsing error. We want to archive this request
3476 * in the dedicated proxy area for later troubleshooting.
3477 */
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]3478 http_capture_bad_message(&s->fe->invalid_req, s, msg, msg->msg_state, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3479 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3480
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3481 txn->req.msg_state = HTTP_MSG_ERROR;
3482 txn->status = 400;
3483 req->analysers = 0;
3484 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3485
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3486 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3487 if (s->listener->counters)
3488 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3489
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3490 if (!(s->flags & SN_ERR_MASK))
3491 s->flags |= SN_ERR_PRXCOND;
3492 if (!(s->flags & SN_FINST_MASK))
3493 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3494 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3495}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3496
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3497/* This function is an analyser which processes the HTTP tarpit. It always
3498 * returns zero, at the beginning because it prevents any other processing
3499 * from occurring, and at the end because it terminates the request.
3500 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3501int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3502{
3503 struct http_txn *txn = &s->txn;
3504
3505 /* This connection is being tarpitted. The CLIENT side has
3506 * already set the connect expiration date to the right
3507 * timeout. We just have to check that the client is still
3508 * there and that the timeout has not expired.
3509 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3510 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3511 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
3512 !tick_is_expired(req->analyse_exp, now_ms))
3513 return 0;
3514
3515 /* We will set the queue timer to the time spent, just for
3516 * logging purposes. We fake a 500 server error, so that the
3517 * attacker will not suspect his connection has been tarpitted.
3518 * It will not cause trouble to the logs because we can exclude
3519 * the tarpitted connections by filtering on the 'PT' status flags.
3520 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3521 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
3522
3523 txn->status = 500;
3524 if (req->flags != BF_READ_ERROR)
3525 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
3526
3527 req->analysers = 0;
3528 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3529
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3530 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3531 if (s->listener->counters)
3532 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3533
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3534 if (!(s->flags & SN_ERR_MASK))
3535 s->flags |= SN_ERR_PRXCOND;
3536 if (!(s->flags & SN_FINST_MASK))
3537 s->flags |= SN_FINST_T;
3538 return 0;
3539}
3540
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3541/* This function is an analyser which processes the HTTP request body. It looks
3542 * for parameters to be used for the load balancing algorithm (url_param). It
3543 * must only be called after the standard HTTP request processing has occurred,
3544 * because it expects the request to be parsed. It returns zero if it needs to
3545 * read more data, or 1 once it has completed its analysis.
3546 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3547int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3548{
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3549 struct http_txn *txn = &s->txn;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3550 struct http_msg *msg = &s->txn.req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3551 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3552
3553 /* We have to parse the HTTP request body to find any required data.
3554 * "balance url_param check_post" should have been the only way to get
3555 * into this. We were brought here after HTTP header analysis, so all
3556 * related structures are ready.
3557 */
3558
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3559 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3560 goto missing_data;
3561
3562 if (msg->msg_state < HTTP_MSG_100_SENT) {
3563 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3564 * send an HTTP/1.1 100 Continue intermediate response.
3565 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3566 if (msg->flags & HTTP_MSGF_VER_11) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3567 struct hdr_ctx ctx;
3568 ctx.idx = 0;
3569 /* Expect is allowed in 1.1, look for it */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]3570 if (http_find_header2("Expect", 6, req->p + msg->sol, &txn->hdr_idx, &ctx) &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3571 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]3572 bo_inject(s->rep, http_100_chunk.str, http_100_chunk.len);
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3573 }
3574 }
3575 msg->msg_state = HTTP_MSG_100_SENT;
3576 }
3577
3578 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]3579 /* we have msg->sov which points to the first byte of message body.
3580 * msg->som still points to the beginning of the message. We must
3581 * save the body in msg->next because it survives buffer re-alignments.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3582 */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]3583 msg->next = msg->sov;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]3584
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]3585 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3586 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3587 else
3588 msg->msg_state = HTTP_MSG_DATA;
3589 }
3590
3591 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3592 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]3593 * set ->sov and ->next to point to the body and switch to DATA or
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3594 * TRAILERS state.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3595 */
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]3596 int ret = http_parse_chunk_size(msg);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3597
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3598 if (!ret)
3599 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3600 else if (ret < 0) {
3601 session_inc_http_err_ctr(s);
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3602 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3603 }
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3604 }
3605
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3606 /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]3607 * We have the first data byte is in msg->sov. We're waiting for at
3608 * least <url_param_post_limit> bytes after msg->sov.
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3609 */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3610
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3611 if (msg->body_len < limit)
3612 limit = msg->body_len;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3613
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]3614 if (req->i - (msg->sov - msg->som) >= limit) /* we have enough bytes now */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3615 goto http_end;
3616
3617 missing_data:
3618 /* we get here if we need to wait for more data */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3619 if (req->flags & BF_FULL) {
3620 session_inc_http_err_ctr(s);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3621 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3622 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3623
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3624 if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
3625 txn->status = 408;
3626 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3627
3628 if (!(s->flags & SN_ERR_MASK))
3629 s->flags |= SN_ERR_CLITO;
3630 if (!(s->flags & SN_FINST_MASK))
3631 s->flags |= SN_FINST_D;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3632 goto return_err_msg;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3633 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3634
3635 /* we get here if we need to wait for more data */
3636 if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3637 /* Not enough data. We'll re-use the http-request
3638 * timeout here. Ideally, we should set the timeout
3639 * relative to the accept() date. We just set the
3640 * request timeout once at the beginning of the
3641 * request.
3642 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3643 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3644 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]3645 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3646 return 0;
3647 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3648
3649 http_end:
3650 /* The situation will not evolve, so let's give up on the analysis. */
3651 s->logs.tv_request = now; /* update the request timer to reflect full request */
3652 req->analysers &= ~an_bit;
3653 req->analyse_exp = TICK_ETERNITY;
3654 return 1;
3655
3656 return_bad_req: /* let's centralize all bad requests */
3657 txn->req.msg_state = HTTP_MSG_ERROR;
3658 txn->status = 400;
3659 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
3660
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3661 if (!(s->flags & SN_ERR_MASK))
3662 s->flags |= SN_ERR_PRXCOND;
3663 if (!(s->flags & SN_FINST_MASK))
3664 s->flags |= SN_FINST_R;
3665
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3666 return_err_msg:
3667 req->analysers = 0;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3668 s->fe->fe_counters.failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3669 if (s->listener->counters)
3670 s->listener->counters->failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3671 return 0;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3672}
3673
Willy Tarreau45c0d982012-03-09 12:11:57 +0100[diff] [blame]3674/* send a server's name with an outgoing request over an established connection */
3675int http_send_name_header(struct http_txn *txn, struct proxy* be, const char* srv_name) {
Mark Lamourinec2247f02012-01-04 13:02:01 -0500[diff] [blame]3676
3677 struct hdr_ctx ctx;
3678
Mark Lamourinec2247f02012-01-04 13:02:01 -0500[diff] [blame]3679 char *hdr_name = be->server_id_hdr_name;
3680 int hdr_name_len = be->server_id_hdr_len;
3681
3682 char *hdr_val;
3683
William Lallemandd9e90662012-01-30 17:27:17 +0100[diff] [blame]3684 ctx.idx = 0;
3685
Willy Tarreau45c0d982012-03-09 12:11:57 +0100[diff] [blame]3686 while (http_find_header2(hdr_name, hdr_name_len, txn->req.buf->p + txn->req.sol, &txn->hdr_idx, &ctx)) {
Mark Lamourinec2247f02012-01-04 13:02:01 -0500[diff] [blame]3687 /* remove any existing values from the header */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]3688 http_remove_header2(&txn->req, &txn->hdr_idx, &ctx);
Mark Lamourinec2247f02012-01-04 13:02:01 -0500[diff] [blame]3689 }
3690
3691 /* Add the new header requested with the server value */
3692 hdr_val = trash;
3693 memcpy(hdr_val, hdr_name, hdr_name_len);
3694 hdr_val += hdr_name_len;
3695 *hdr_val++ = ':';
3696 *hdr_val++ = ' ';
3697 hdr_val += strlcpy2(hdr_val, srv_name, trash + sizeof(trash) - hdr_val);
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]3698 http_header_add_tail2(&txn->req, &txn->hdr_idx, trash, hdr_val - trash);
Mark Lamourinec2247f02012-01-04 13:02:01 -0500[diff] [blame]3699
3700 return 0;
3701}
3702
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3703/* Terminate current transaction and prepare a new one. This is very tricky
3704 * right now but it works.
3705 */
3706void http_end_txn_clean_session(struct session *s)
3707{
3708 /* FIXME: We need a more portable way of releasing a backend's and a
3709 * server's connections. We need a safer way to reinitialize buffer
3710 * flags. We also need a more accurate method for computing per-request
3711 * data.
3712 */
3713 http_silent_debug(__LINE__, s);
3714
3715 s->req->cons->flags |= SI_FL_NOLINGER;
3716 s->req->cons->shutr(s->req->cons);
3717 s->req->cons->shutw(s->req->cons);
3718
3719 http_silent_debug(__LINE__, s);
3720
Willy Tarreau2d5cd472012-03-01 23:34:37 +0100[diff] [blame]3721 if (s->flags & SN_BE_ASSIGNED) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3722 s->be->beconn--;
Willy Tarreau2d5cd472012-03-01 23:34:37 +0100[diff] [blame]3723 if (unlikely(s->srv_conn))
3724 sess_change_server(s, NULL);
3725 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3726
3727 s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
3728 session_process_counters(s);
Willy Tarreauf059a0f2010-08-03 16:29:52 +0200[diff] [blame]3729 session_stop_backend_counters(s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3730
3731 if (s->txn.status) {
3732 int n;
3733
3734 n = s->txn.status / 100;
3735 if (n < 1 || n > 5)
3736 n = 0;
3737
3738 if (s->fe->mode == PR_MODE_HTTP)
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3739 s->fe->fe_counters.p.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3740
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3741 if ((s->flags & SN_BE_ASSIGNED) &&
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3742 (s->be->mode == PR_MODE_HTTP))
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3743 s->be->be_counters.p.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3744 }
3745
3746 /* don't count other requests' data */
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]3747 s->logs.bytes_in -= s->req->i;
3748 s->logs.bytes_out -= s->rep->i;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3749
3750 /* let's do a final log if we need it */
3751 if (s->logs.logwait &&
3752 !(s->flags & SN_MONITOR) &&
3753 (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
3754 s->do_log(s);
3755 }
3756
3757 s->logs.accept_date = date; /* user-visible date for logging */
3758 s->logs.tv_accept = now; /* corrected date for internal use */
3759 tv_zero(&s->logs.tv_request);
3760 s->logs.t_queue = -1;
3761 s->logs.t_connect = -1;
3762 s->logs.t_data = -1;
3763 s->logs.t_close = 0;
3764 s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
3765 s->logs.srv_queue_size = 0; /* we will get this number soon */
3766
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]3767 s->logs.bytes_in = s->req->total = s->req->i;
3768 s->logs.bytes_out = s->rep->total = s->rep->i;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3769
3770 if (s->pend_pos)
3771 pendconn_free(s->pend_pos);
3772
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3773 if (target_srv(&s->target)) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3774 if (s->flags & SN_CURR_SESS) {
3775 s->flags &= ~SN_CURR_SESS;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3776 target_srv(&s->target)->cur_sess--;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3777 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3778 if (may_dequeue_tasks(target_srv(&s->target), s->be))
3779 process_srv_queue(target_srv(&s->target));
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3780 }
3781
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]3782 clear_target(&s->target);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3783
3784 s->req->cons->state = s->req->cons->prev_state = SI_ST_INI;
3785 s->req->cons->fd = -1; /* just to help with debugging */
3786 s->req->cons->err_type = SI_ET_NONE;
Willy Tarreau0b3a4112011-03-27 19:16:56 +0200[diff] [blame]3787 s->req->cons->conn_retries = 0; /* used for logging too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3788 s->req->cons->err_loc = NULL;
3789 s->req->cons->exp = TICK_ETERNITY;
3790 s->req->cons->flags = SI_FL_NONE;
Willy Tarreau96e31212011-05-30 18:10:30 +0200[diff] [blame]3791 s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST|BF_NEVER_WAIT);
3792 s->rep->flags &= ~(BF_SHUTR|BF_SHUTR_NOW|BF_READ_ATTACHED|BF_READ_ERROR|BF_READ_NOEXP|BF_STREAMER|BF_STREAMER_FAST|BF_WRITE_PARTIAL|BF_NEVER_WAIT);
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]3793 s->flags &= ~(SN_DIRECT|SN_ASSIGNED|SN_ADDR_SET|SN_BE_ASSIGNED|SN_FORCE_PRST|SN_IGNORE_PRST);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3794 s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE);
3795 s->txn.meth = 0;
3796 http_reset_txn(s);
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]3797 s->txn.flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ;
Willy Tarreauee55dc02010-06-01 10:56:34 +0200[diff] [blame]3798 if (s->fe->options2 & PR_O2_INDEPSTR)
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3799 s->req->cons->flags |= SI_FL_INDEP_STR;
3800
Willy Tarreau96e31212011-05-30 18:10:30 +0200[diff] [blame]3801 if (s->fe->options2 & PR_O2_NODELAY) {
3802 s->req->flags |= BF_NEVER_WAIT;
3803 s->rep->flags |= BF_NEVER_WAIT;
3804 }
3805
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3806 /* if the request buffer is not empty, it means we're
3807 * about to process another request, so send pending
3808 * data with MSG_MORE to merge TCP packets when possible.
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3809 * Just don't do this if the buffer is close to be full,
3810 * because the request will wait for it to flush a little
3811 * bit before proceeding.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3812 */
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]3813 if (s->req->i) {
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]3814 if (s->rep->o &&
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3815 !(s->rep->flags & BF_FULL) &&
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]3816 bi_end(s->rep) <= s->rep->data + s->rep->size - global.tune.maxrewrite)
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3817 s->rep->flags |= BF_EXPECT_MORE;
3818 }
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3819
3820 /* we're removing the analysers, we MUST re-enable events detection */
3821 buffer_auto_read(s->req);
3822 buffer_auto_close(s->req);
3823 buffer_auto_read(s->rep);
3824 buffer_auto_close(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3825
Willy Tarreau342b11c2010-11-24 16:22:09 +0100[diff] [blame]3826 s->req->analysers = s->listener->analysers;
3827 s->req->analysers &= ~AN_REQ_DECODE_PROXY;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3828 s->rep->analysers = 0;
3829
3830 http_silent_debug(__LINE__, s);
3831}
3832
3833
3834/* This function updates the request state machine according to the response
3835 * state machine and buffer flags. It returns 1 if it changes anything (flag
3836 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
3837 * it is only used to find when a request/response couple is complete. Both
3838 * this function and its equivalent should loop until both return zero. It
3839 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
3840 */
3841int http_sync_req_state(struct session *s)
3842{
3843 struct buffer *buf = s->req;
3844 struct http_txn *txn = &s->txn;
3845 unsigned int old_flags = buf->flags;
3846 unsigned int old_state = txn->req.msg_state;
3847
3848 http_silent_debug(__LINE__, s);
3849 if (unlikely(txn->req.msg_state < HTTP_MSG_BODY))
3850 return 0;
3851
3852 if (txn->req.msg_state == HTTP_MSG_DONE) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3853 /* No need to read anymore, the request was completely parsed.
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]3854 * We can shut the read side unless we want to abort_on_close,
3855 * or we have a POST request. The issue with POST requests is
3856 * that some browsers still send a CRLF after the request, and
3857 * this CRLF must be read so that it does not remain in the kernel
3858 * buffers, otherwise a close could cause an RST on some systems
3859 * (eg: Linux).
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3860 */
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]3861 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3862 buffer_dont_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3863
3864 if (txn->rsp.msg_state == HTTP_MSG_ERROR)
3865 goto wait_other_side;
3866
3867 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
3868 /* The server has not finished to respond, so we
3869 * don't want to move in order not to upset it.
3870 */
3871 goto wait_other_side;
3872 }
3873
3874 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
3875 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3876 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3877 txn->req.msg_state = HTTP_MSG_TUNNEL;
3878 goto wait_other_side;
3879 }
3880
3881 /* When we get here, it means that both the request and the
3882 * response have finished receiving. Depending on the connection
3883 * mode, we'll have to wait for the last bytes to leave in either
3884 * direction, and sometimes for a close to be effective.
3885 */
3886
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3887 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
3888 /* Server-close mode : queue a connection close to the server */
3889 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW)))
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3890 buffer_shutw_now(buf);
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3891 }
3892 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
3893 /* Option forceclose is set, or either side wants to close,
3894 * let's enforce it now that we're not expecting any new
3895 * data to come. The caller knows the session is complete
3896 * once both states are CLOSED.
3897 */
3898 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3899 buffer_shutr_now(buf);
3900 buffer_shutw_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3901 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3902 }
3903 else {
3904 /* The last possible modes are keep-alive and tunnel. Since tunnel
3905 * mode does not set the body analyser, we can't reach this place
3906 * in tunnel mode, so we're left with keep-alive only.
3907 * This mode is currently not implemented, we switch to tunnel mode.
3908 */
3909 buffer_auto_read(buf);
3910 txn->req.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3911 }
3912
3913 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
3914 /* if we've just closed an output, let's switch */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3915 buf->cons->flags |= SI_FL_NOLINGER; /* we want to close ASAP */
3916
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3917 if (!(buf->flags & BF_OUT_EMPTY)) {
3918 txn->req.msg_state = HTTP_MSG_CLOSING;
3919 goto http_msg_closing;
3920 }
3921 else {
3922 txn->req.msg_state = HTTP_MSG_CLOSED;
3923 goto http_msg_closed;
3924 }
3925 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3926 goto wait_other_side;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3927 }
3928
3929 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
3930 http_msg_closing:
3931 /* nothing else to forward, just waiting for the output buffer
3932 * to be empty and for the shutw_now to take effect.
3933 */
3934 if (buf->flags & BF_OUT_EMPTY) {
3935 txn->req.msg_state = HTTP_MSG_CLOSED;
3936 goto http_msg_closed;
3937 }
3938 else if (buf->flags & BF_SHUTW) {
3939 txn->req.msg_state = HTTP_MSG_ERROR;
3940 goto wait_other_side;
3941 }
3942 }
3943
3944 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
3945 http_msg_closed:
3946 goto wait_other_side;
3947 }
3948
3949 wait_other_side:
3950 http_silent_debug(__LINE__, s);
3951 return txn->req.msg_state != old_state || buf->flags != old_flags;
3952}
3953
3954
3955/* This function updates the response state machine according to the request
3956 * state machine and buffer flags. It returns 1 if it changes anything (flag
3957 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
3958 * it is only used to find when a request/response couple is complete. Both
3959 * this function and its equivalent should loop until both return zero. It
3960 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
3961 */
3962int http_sync_res_state(struct session *s)
3963{
3964 struct buffer *buf = s->rep;
3965 struct http_txn *txn = &s->txn;
3966 unsigned int old_flags = buf->flags;
3967 unsigned int old_state = txn->rsp.msg_state;
3968
3969 http_silent_debug(__LINE__, s);
3970 if (unlikely(txn->rsp.msg_state < HTTP_MSG_BODY))
3971 return 0;
3972
3973 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
3974 /* In theory, we don't need to read anymore, but we must
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3975 * still monitor the server connection for a possible close
3976 * while the request is being uploaded, so we don't disable
3977 * reading.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3978 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3979 /* buffer_dont_read(buf); */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3980
3981 if (txn->req.msg_state == HTTP_MSG_ERROR)
3982 goto wait_other_side;
3983
3984 if (txn->req.msg_state < HTTP_MSG_DONE) {
3985 /* The client seems to still be sending data, probably
3986 * because we got an error response during an upload.
3987 * We have the choice of either breaking the connection
3988 * or letting it pass through. Let's do the later.
3989 */
3990 goto wait_other_side;
3991 }
3992
3993 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
3994 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3995 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3996 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
3997 goto wait_other_side;
3998 }
3999
4000 /* When we get here, it means that both the request and the
4001 * response have finished receiving. Depending on the connection
4002 * mode, we'll have to wait for the last bytes to leave in either
4003 * direction, and sometimes for a close to be effective.
4004 */
4005
4006 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4007 /* Server-close mode : shut read and wait for the request
4008 * side to close its output buffer. The caller will detect
4009 * when we're in DONE and the other is in CLOSED and will
4010 * catch that for the final cleanup.
4011 */
4012 if (!(buf->flags & (BF_SHUTR|BF_SHUTR_NOW)))
4013 buffer_shutr_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4014 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4015 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4016 /* Option forceclose is set, or either side wants to close,
4017 * let's enforce it now that we're not expecting any new
4018 * data to come. The caller knows the session is complete
4019 * once both states are CLOSED.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4020 */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4021 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
4022 buffer_shutr_now(buf);
4023 buffer_shutw_now(buf);
4024 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4025 }
4026 else {
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4027 /* The last possible modes are keep-alive and tunnel. Since tunnel
4028 * mode does not set the body analyser, we can't reach this place
4029 * in tunnel mode, so we're left with keep-alive only.
4030 * This mode is currently not implemented, we switch to tunnel mode.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4031 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4032 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4033 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4034 }
4035
4036 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4037 /* if we've just closed an output, let's switch */
4038 if (!(buf->flags & BF_OUT_EMPTY)) {
4039 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4040 goto http_msg_closing;
4041 }
4042 else {
4043 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4044 goto http_msg_closed;
4045 }
4046 }
4047 goto wait_other_side;
4048 }
4049
4050 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4051 http_msg_closing:
4052 /* nothing else to forward, just waiting for the output buffer
4053 * to be empty and for the shutw_now to take effect.
4054 */
4055 if (buf->flags & BF_OUT_EMPTY) {
4056 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4057 goto http_msg_closed;
4058 }
4059 else if (buf->flags & BF_SHUTW) {
4060 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4061 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4062 if (target_srv(&s->target))
4063 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4064 goto wait_other_side;
4065 }
4066 }
4067
4068 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4069 http_msg_closed:
4070 /* drop any pending data */
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]4071 bi_erase(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4072 buffer_auto_close(buf);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4073 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4074 goto wait_other_side;
4075 }
4076
4077 wait_other_side:
4078 http_silent_debug(__LINE__, s);
4079 return txn->rsp.msg_state != old_state || buf->flags != old_flags;
4080}
4081
4082
4083/* Resync the request and response state machines. Return 1 if either state
4084 * changes.
4085 */
4086int http_resync_states(struct session *s)
4087{
4088 struct http_txn *txn = &s->txn;
4089 int old_req_state = txn->req.msg_state;
4090 int old_res_state = txn->rsp.msg_state;
4091
4092 http_silent_debug(__LINE__, s);
4093 http_sync_req_state(s);
4094 while (1) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4095 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4096 if (!http_sync_res_state(s))
4097 break;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4098 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4099 if (!http_sync_req_state(s))
4100 break;
4101 }
4102 http_silent_debug(__LINE__, s);
4103 /* OK, both state machines agree on a compatible state.
4104 * There are a few cases we're interested in :
4105 * - HTTP_MSG_TUNNEL on either means we have to disable both analysers
4106 * - HTTP_MSG_CLOSED on both sides means we've reached the end in both
4107 * directions, so let's simply disable both analysers.
4108 * - HTTP_MSG_CLOSED on the response only means we must abort the
4109 * request.
4110 * - HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE on the response
4111 * with server-close mode means we've completed one request and we
4112 * must re-initialize the server connection.
4113 */
4114
4115 if (txn->req.msg_state == HTTP_MSG_TUNNEL ||
4116 txn->rsp.msg_state == HTTP_MSG_TUNNEL ||
4117 (txn->req.msg_state == HTTP_MSG_CLOSED &&
4118 txn->rsp.msg_state == HTTP_MSG_CLOSED)) {
4119 s->req->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4120 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4121 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4122 s->rep->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4123 buffer_auto_close(s->rep);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4124 buffer_auto_read(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4125 }
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4126 else if (txn->rsp.msg_state == HTTP_MSG_CLOSED ||
4127 txn->rsp.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4128 txn->req.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4129 (s->rep->flags & BF_SHUTW)) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4130 s->rep->analysers = 0;
4131 buffer_auto_close(s->rep);
4132 buffer_auto_read(s->rep);
4133 s->req->analysers = 0;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4134 buffer_abort(s->req);
4135 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4136 buffer_auto_read(s->req);
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]4137 bi_erase(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4138 }
4139 else if (txn->req.msg_state == HTTP_MSG_CLOSED &&
4140 txn->rsp.msg_state == HTTP_MSG_DONE &&
4141 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)) {
4142 /* server-close: terminate this server connection and
4143 * reinitialize a fresh-new transaction.
4144 */
4145 http_end_txn_clean_session(s);
4146 }
4147
4148 http_silent_debug(__LINE__, s);
4149 return txn->req.msg_state != old_req_state ||
4150 txn->rsp.msg_state != old_res_state;
4151}
4152
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4153/* This function is an analyser which forwards request body (including chunk
4154 * sizes if any). It is called as soon as we must forward, even if we forward
4155 * zero byte. The only situation where it must not be called is when we're in
4156 * tunnel mode and we want to forward till the close. It's used both to forward
4157 * remaining data and to resync after end of body. It expects the msg_state to
4158 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4159 * read more data, or 1 once we can go on with next request or end the session.
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]4160 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4161 * bytes of pending data + the headers if not already done (between som and sov).
4162 * It eventually adjusts som to match sov after the data in between have been sent.
4163 */
4164int http_request_forward_body(struct session *s, struct buffer *req, int an_bit)
4165{
4166 struct http_txn *txn = &s->txn;
4167 struct http_msg *msg = &s->txn.req;
4168
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4169 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4170 return 0;
4171
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4172 if ((req->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]4173 ((req->flags & BF_SHUTW) && (req->to_forward || req->o))) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4174 /* Output closed while we were sending data. We must abort and
4175 * wake the other side up.
4176 */
4177 msg->msg_state = HTTP_MSG_ERROR;
4178 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4179 return 1;
4180 }
4181
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4182 /* in most states, we should abort in case of early close */
4183 buffer_auto_close(req);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4184
4185 /* Note that we don't have to send 100-continue back because we don't
4186 * need the data to complete our job, and it's up to the server to
4187 * decide whether to return 100, 417 or anything else in return of
4188 * an "Expect: 100-continue" header.
4189 */
4190
4191 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]4192 /* we have msg->sov which points to the first byte of message body.
4193 * msg->som still points to the beginning of the message. We must
4194 * save the body in msg->next because it survives buffer re-alignments.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4195 */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]4196 msg->next = msg->sov;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]4197
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4198 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4199 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4200 else {
4201 msg->msg_state = HTTP_MSG_DATA;
4202 }
4203 }
4204
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4205 while (1) {
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4206 int bytes;
4207
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4208 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4209 /* we may have some data pending */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4210 bytes = msg->sov - msg->som;
4211 if (msg->chunk_len || bytes) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4212 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4213 if (likely(bytes < 0)) /* sov may have wrapped at the end */
4214 bytes += req->size;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]4215 msg->next -= bytes; /* will be forwarded */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4216 msg->chunk_len += (unsigned int)bytes;
4217 msg->chunk_len -= buffer_forward(req, msg->chunk_len);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4218 }
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4219
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4220 if (msg->msg_state == HTTP_MSG_DATA) {
4221 /* must still forward */
4222 if (req->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4223 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4224
4225 /* nothing left to forward */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4226 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4227 msg->msg_state = HTTP_MSG_DATA_CRLF;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4228 else
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4229 msg->msg_state = HTTP_MSG_DONE;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4230 }
4231 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]4232 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]4233 * set ->sov and ->next to point to the body and switch to DATA or
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4234 * TRAILERS state.
4235 */
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]4236 int ret = http_parse_chunk_size(msg);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4237
4238 if (!ret)
4239 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4240 else if (ret < 0) {
4241 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4242 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4243 http_capture_bad_message(&s->fe->invalid_req, s, msg, HTTP_MSG_CHUNK_SIZE, s->be);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4244 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4245 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4246 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4247 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4248 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
4249 /* we want the CRLF after the data */
4250 int ret;
4251
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]4252 ret = http_skip_chunk_crlf(msg);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4253
4254 if (ret == 0)
4255 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4256 else if (ret < 0) {
4257 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4258 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4259 http_capture_bad_message(&s->fe->invalid_req, s, msg, HTTP_MSG_DATA_CRLF, s->be);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4260 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4261 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4262 /* we're in MSG_CHUNK_SIZE now */
4263 }
4264 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]4265 int ret = http_forward_trailers(msg);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4266
4267 if (ret == 0)
4268 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4269 else if (ret < 0) {
4270 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4271 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4272 http_capture_bad_message(&s->fe->invalid_req, s, msg, HTTP_MSG_TRAILERS, s->be);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4273 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4274 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4275 /* we're in HTTP_MSG_DONE now */
4276 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4277 else {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4278 int old_state = msg->msg_state;
4279
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4280 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4281 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4282 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
4283 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
4284 buffer_dont_close(req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4285 if (http_resync_states(s)) {
4286 /* some state changes occurred, maybe the analyser
4287 * was disabled too.
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]4288 */
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4289 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4290 if (req->flags & BF_SHUTW) {
4291 /* request errors are most likely due to
4292 * the server aborting the transfer.
4293 */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4294 goto aborted_xfer;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4295 }
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4296 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4297 http_capture_bad_message(&s->fe->invalid_req, s, msg, old_state, s->be);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4298 goto return_bad_req;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4299 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4300 return 1;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4301 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4302
4303 /* If "option abortonclose" is set on the backend, we
4304 * want to monitor the client's connection and forward
4305 * any shutdown notification to the server, which will
4306 * decide whether to close or to go on processing the
4307 * request.
4308 */
4309 if (s->be->options & PR_O_ABRT_CLOSE) {
4310 buffer_auto_read(req);
4311 buffer_auto_close(req);
4312 }
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4313 else if (s->txn.meth == HTTP_METH_POST) {
4314 /* POST requests may require to read extra CRLF
4315 * sent by broken browsers and which could cause
4316 * an RST to be sent upon close on some systems
4317 * (eg: Linux).
4318 */
4319 buffer_auto_read(req);
4320 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4321
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4322 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4323 }
4324 }
4325
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4326 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4327 /* stop waiting for data if the input is closed before the end */
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4328 if (req->flags & BF_SHUTR) {
4329 if (!(s->flags & SN_ERR_MASK))
4330 s->flags |= SN_ERR_CLICL;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4331 if (!(s->flags & SN_FINST_MASK)) {
4332 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4333 s->flags |= SN_FINST_H;
4334 else
4335 s->flags |= SN_FINST_D;
4336 }
4337
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4338 s->fe->fe_counters.cli_aborts++;
4339 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4340 if (target_srv(&s->target))
4341 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4342
4343 goto return_bad_req_stats_ok;
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4344 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4345
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4346 /* waiting for the last bits to leave the buffer */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4347 if (req->flags & BF_SHUTW)
4348 goto aborted_xfer;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4349
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4350 /* When TE: chunked is used, we need to get there again to parse remaining
4351 * chunks even if the client has closed, so we don't want to set BF_DONTCLOSE.
4352 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4353 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4354 buffer_dont_close(req);
4355
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4356 /* We know that more data are expected, but we couldn't send more that
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]4357 * what we did. So we always set the BF_EXPECT_MORE flag so that the
4358 * system knows it must not set a PUSH on this first part. Interactive
Willy Tarreau869fc1e2012-03-05 08:29:20 +0100[diff] [blame]4359 * modes are already handled by the stream sock layer. We must not do
4360 * this in content-length mode because it could present the MSG_MORE
4361 * flag with the last block of forwarded data, which would cause an
4362 * additional delay to be observed by the receiver.
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4363 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4364 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreau869fc1e2012-03-05 08:29:20 +0100[diff] [blame]4365 req->flags |= BF_EXPECT_MORE;
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4366
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4367 http_silent_debug(__LINE__, s);
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4368 return 0;
4369
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4370 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4371 s->fe->fe_counters.failed_req++;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4372 if (s->listener->counters)
4373 s->listener->counters->failed_req++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4374 return_bad_req_stats_ok:
4375 txn->req.msg_state = HTTP_MSG_ERROR;
4376 if (txn->status) {
4377 /* Note: we don't send any error if some data were already sent */
4378 stream_int_retnclose(req->prod, NULL);
4379 } else {
4380 txn->status = 400;
4381 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
4382 }
4383 req->analysers = 0;
4384 s->rep->analysers = 0; /* we're in data phase, we want to abort both directions */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4385
4386 if (!(s->flags & SN_ERR_MASK))
4387 s->flags |= SN_ERR_PRXCOND;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4388 if (!(s->flags & SN_FINST_MASK)) {
4389 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4390 s->flags |= SN_FINST_H;
4391 else
4392 s->flags |= SN_FINST_D;
4393 }
4394 return 0;
4395
4396 aborted_xfer:
4397 txn->req.msg_state = HTTP_MSG_ERROR;
4398 if (txn->status) {
4399 /* Note: we don't send any error if some data were already sent */
4400 stream_int_retnclose(req->prod, NULL);
4401 } else {
4402 txn->status = 502;
4403 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_502));
4404 }
4405 req->analysers = 0;
4406 s->rep->analysers = 0; /* we're in data phase, we want to abort both directions */
4407
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4408 s->fe->fe_counters.srv_aborts++;
4409 s->be->be_counters.srv_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4410 if (target_srv(&s->target))
4411 target_srv(&s->target)->counters.srv_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4412
4413 if (!(s->flags & SN_ERR_MASK))
4414 s->flags |= SN_ERR_SRVCL;
4415 if (!(s->flags & SN_FINST_MASK)) {
4416 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4417 s->flags |= SN_FINST_H;
4418 else
4419 s->flags |= SN_FINST_D;
4420 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4421 return 0;
4422}
4423
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4424/* This stream analyser waits for a complete HTTP response. It returns 1 if the
4425 * processing can continue on next analysers, or zero if it either needs more
4426 * data or wants to immediately abort the response (eg: timeout, error, ...). It
4427 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
4428 * when it has nothing left to do, and may remove any analyser when it wants to
4429 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4430 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4431int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4432{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4433 struct http_txn *txn = &s->txn;
4434 struct http_msg *msg = &txn->rsp;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4435 struct hdr_ctx ctx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4436 int use_close_only;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4437 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4438 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]4439
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]4440 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]4441 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4442 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4443 rep,
4444 rep->rex, rep->wex,
4445 rep->flags,
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]4446 rep->i,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4447 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]4448
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4449 /*
4450 * Now parse the partial (or complete) lines.
4451 * We will check the response syntax, and also join multi-line
4452 * headers. An index of all the lines will be elaborated while
4453 * parsing.
4454 *
4455 * For the parsing, we use a 28 states FSM.
4456 *
4457 * Here is the information we currently have :
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4458 * rep->data + msg->som = beginning of response
4459 * rep->data + msg->eoh = end of processed headers / start of current one
4460 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]4461 * msg->next = first non-visited byte
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4462 * rep->r = end of data
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4463 * Once we reach MSG_BODY, rep->sol = rep->data + msg->som
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4464 */
4465
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4466 /* There's a protected area at the end of the buffer for rewriting
4467 * purposes. We don't want to start to parse the request if the
4468 * protected area is affected, because we may have to move processed
4469 * data later, which is much more complicated.
4470 */
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]4471 if (buffer_not_empty(rep) && msg->msg_state < HTTP_MSG_ERROR) {
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4472 if (unlikely((rep->flags & BF_FULL) ||
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]4473 bi_end(rep) < b_ptr(rep, msg->next) ||
4474 bi_end(rep) > rep->data + rep->size - global.tune.maxrewrite)) {
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]4475 if (rep->o) {
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4476 /* some data has still not left the buffer, wake us once that's done */
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4477 if (rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
4478 goto abort_response;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4479 buffer_dont_close(rep);
4480 rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
4481 return 0;
4482 }
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]4483 if (rep->i <= rep->size - global.tune.maxrewrite)
Willy Tarreau21710ff2012-03-09 13:58:04 +0100[diff] [blame]4484 http_message_realign(msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4485 }
4486
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]4487 if (likely(msg->next < rep->i))
Willy Tarreaua560c212012-03-09 13:50:57 +0100[diff] [blame]4488 http_msg_analyzer(msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4489 }
4490
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4491 /* 1: we might have to print this header in debug mode */
4492 if (unlikely((global.mode & MODE_DEBUG) &&
4493 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]4494 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4495 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4496 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4497
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]4498 sol = rep->p + msg->som;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]4499 eol = sol + msg->sl.st.l;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4500 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4501
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4502 sol += hdr_idx_first_pos(&txn->hdr_idx);
4503 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4504
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4505 while (cur_idx) {
4506 eol = sol + txn->hdr_idx.v[cur_idx].len;
4507 debug_hdr("srvhdr", s, sol, eol);
4508 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
4509 cur_idx = txn->hdr_idx.v[cur_idx].next;
4510 }
4511 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4512
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4513 /*
4514 * Now we quickly check if we have found a full valid response.
4515 * If not so, we check the FD and buffer states before leaving.
4516 * A full response is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4517 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4518 * responses are checked first.
4519 *
4520 * Depending on whether the client is still there or not, we
4521 * may send an error response back or not. Note that normally
4522 * we should only check for HTTP status there, and check I/O
4523 * errors somewhere else.
4524 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4525
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4526 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4527 /* Invalid response */
4528 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4529 /* we detected a parsing error. We want to archive this response
4530 * in the dedicated proxy area for later troubleshooting.
4531 */
4532 hdr_response_bad:
4533 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4534 http_capture_bad_message(&s->be->invalid_rep, s, msg, msg->msg_state, s->fe);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4535
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4536 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4537 if (target_srv(&s->target)) {
4538 target_srv(&s->target)->counters.failed_resp++;
4539 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_HDRRSP);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4540 }
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4541 abort_response:
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4542 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4543 rep->analysers = 0;
4544 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4545 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]4546 bi_erase(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4547 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
4548
4549 if (!(s->flags & SN_ERR_MASK))
4550 s->flags |= SN_ERR_PRXCOND;
4551 if (!(s->flags & SN_FINST_MASK))
4552 s->flags |= SN_FINST_H;
4553
4554 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4555 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4556
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4557 /* too large response does not fit in buffer. */
4558 else if (rep->flags & BF_FULL) {
Willy Tarreaufec4d892011-09-02 20:04:57 +0200[diff] [blame]4559 if (msg->err_pos < 0)
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]4560 msg->err_pos = rep->i;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4561 goto hdr_response_bad;
4562 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4563
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4564 /* read error */
4565 else if (rep->flags & BF_READ_ERROR) {
4566 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4567 http_capture_bad_message(&s->be->invalid_rep, s, msg, msg->msg_state, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4568
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4569 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4570 if (target_srv(&s->target)) {
4571 target_srv(&s->target)->counters.failed_resp++;
4572 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_READ_ERROR);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4573 }
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]4574
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4575 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4576 rep->analysers = 0;
4577 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4578 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]4579 bi_erase(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4580 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4581
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4582 if (!(s->flags & SN_ERR_MASK))
4583 s->flags |= SN_ERR_SRVCL;
4584 if (!(s->flags & SN_FINST_MASK))
4585 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]4586 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4587 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4588
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4589 /* read timeout : return a 504 to the client. */
4590 else if (rep->flags & BF_READ_TIMEOUT) {
4591 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4592 http_capture_bad_message(&s->be->invalid_rep, s, msg, msg->msg_state, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4593
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4594 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4595 if (target_srv(&s->target)) {
4596 target_srv(&s->target)->counters.failed_resp++;
4597 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4598 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4599
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4600 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4601 rep->analysers = 0;
4602 txn->status = 504;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4603 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]4604 bi_erase(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4605 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4606
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4607 if (!(s->flags & SN_ERR_MASK))
4608 s->flags |= SN_ERR_SRVTO;
4609 if (!(s->flags & SN_FINST_MASK))
4610 s->flags |= SN_FINST_H;
4611 return 0;
4612 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]4613
Willy Tarreau3b8c08a2011-09-02 20:16:24 +0200[diff] [blame]4614 /* close from server, capture the response if the server has started to respond */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4615 else if (rep->flags & BF_SHUTR) {
Willy Tarreau3b8c08a2011-09-02 20:16:24 +0200[diff] [blame]4616 if (msg->msg_state >= HTTP_MSG_RPVER || msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4617 http_capture_bad_message(&s->be->invalid_rep, s, msg, msg->msg_state, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4618
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4619 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4620 if (target_srv(&s->target)) {
4621 target_srv(&s->target)->counters.failed_resp++;
4622 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4623 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4624
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4625 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4626 rep->analysers = 0;
4627 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4628 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]4629 bi_erase(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4630 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4631
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4632 if (!(s->flags & SN_ERR_MASK))
4633 s->flags |= SN_ERR_SRVCL;
4634 if (!(s->flags & SN_FINST_MASK))
4635 s->flags |= SN_FINST_H;
4636 return 0;
4637 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4638
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4639 /* write error to client (we don't send any message then) */
4640 else if (rep->flags & BF_WRITE_ERROR) {
4641 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4642 http_capture_bad_message(&s->be->invalid_rep, s, msg, msg->msg_state, s->fe);
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4643
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4644 s->be->be_counters.failed_resp++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4645 rep->analysers = 0;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4646 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4647
4648 if (!(s->flags & SN_ERR_MASK))
4649 s->flags |= SN_ERR_CLICL;
4650 if (!(s->flags & SN_FINST_MASK))
4651 s->flags |= SN_FINST_H;
4652
4653 /* process_session() will take care of the error */
4654 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4655 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4656
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4657 buffer_dont_close(rep);
4658 return 0;
4659 }
4660
4661 /* More interesting part now : we know that we have a complete
4662 * response which at least looks like HTTP. We have an indicator
4663 * of each header's length, so we can parse them quickly.
4664 */
4665
4666 if (unlikely(msg->err_pos >= 0))
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]4667 http_capture_bad_message(&s->be->invalid_rep, s, msg, msg->msg_state, s->fe);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4668
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4669 /*
4670 * 1: get the status code
4671 */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]4672 n = rep->p[msg->sol + msg->sl.st.c] - '0';
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4673 if (n < 1 || n > 5)
4674 n = 0;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4675 /* when the client triggers a 4xx from the server, it's most often due
4676 * to a missing object or permission. These events should be tracked
4677 * because if they happen often, it may indicate a brute force or a
4678 * vulnerability scan.
4679 */
4680 if (n == 4)
4681 session_inc_http_err_ctr(s);
4682
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4683 if (target_srv(&s->target))
4684 target_srv(&s->target)->counters.p.http.rsp[n]++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4685
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4686 /* check if the response is HTTP/1.1 or above */
4687 if ((msg->sl.st.v_l == 8) &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]4688 ((rep->p[msg->sol + 5] > '1') ||
4689 ((rep->p[msg->sol + 5] == '1') &&
4690 (rep->p[msg->sol + 7] >= '1'))))
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4691 msg->flags |= HTTP_MSGF_VER_11;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4692
4693 /* "connection" has not been parsed yet */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4694 txn->flags &= ~(TX_HDR_CONN_PRS|TX_HDR_CONN_CLO|TX_HDR_CONN_KAL|TX_CON_CLO_SET|TX_CON_KAL_SET);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4695
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4696 /* transfer length unknown*/
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4697 msg->flags &= ~HTTP_MSGF_XFER_LEN;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4698
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]4699 txn->status = strl2ui(rep->p + msg->sol + msg->sl.st.c, msg->sl.st.c_l);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4700
Willy Tarreau39650402010-03-15 19:44:39 +0100[diff] [blame]4701 /* Adjust server's health based on status code. Note: status codes 501
4702 * and 505 are triggered on demand by client request, so we must not
4703 * count them as server failures.
4704 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4705 if (target_srv(&s->target)) {
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4706 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4707 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_OK);
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4708 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4709 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_STS);
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4710 }
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4711
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4712 /*
4713 * 2: check for cacheability.
4714 */
4715
4716 switch (txn->status) {
4717 case 200:
4718 case 203:
4719 case 206:
4720 case 300:
4721 case 301:
4722 case 410:
4723 /* RFC2616 @13.4:
4724 * "A response received with a status code of
4725 * 200, 203, 206, 300, 301 or 410 MAY be stored
4726 * by a cache (...) unless a cache-control
4727 * directive prohibits caching."
4728 *
4729 * RFC2616 @9.5: POST method :
4730 * "Responses to this method are not cacheable,
4731 * unless the response includes appropriate
4732 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4733 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4734 if (likely(txn->meth != HTTP_METH_POST) &&
4735 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
4736 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4737 break;
4738 default:
4739 break;
4740 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4741
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4742 /*
4743 * 3: we may need to capture headers
4744 */
4745 s->logs.logwait &= ~LW_RESP;
Willy Tarreau42f7d892012-03-24 08:28:09 +0100[diff] [blame]4746 if (unlikely((s->logs.logwait & LW_RSPHDR) && txn->rsp.cap))
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]4747 capture_headers(rep->p + msg->sol, &txn->hdr_idx,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4748 txn->rsp.cap, s->fe->rsp_cap);
4749
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4750 /* 4: determine the transfer-length.
4751 * According to RFC2616 #4.4, amended by the HTTPbis working group,
4752 * the presence of a message-body in a RESPONSE and its transfer length
4753 * must be determined that way :
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4754 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4755 * All responses to the HEAD request method MUST NOT include a
4756 * message-body, even though the presence of entity-header fields
4757 * might lead one to believe they do. All 1xx (informational), 204
4758 * (No Content), and 304 (Not Modified) responses MUST NOT include a
4759 * message-body. All other responses do include a message-body,
4760 * although it MAY be of zero length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4761 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4762 * 1. Any response which "MUST NOT" include a message-body (such as the
4763 * 1xx, 204 and 304 responses and any response to a HEAD request) is
4764 * always terminated by the first empty line after the header fields,
4765 * regardless of the entity-header fields present in the message.
4766 *
4767 * 2. If a Transfer-Encoding header field (Section 9.7) is present and
4768 * the "chunked" transfer-coding (Section 6.2) is used, the
4769 * transfer-length is defined by the use of this transfer-coding.
4770 * If a Transfer-Encoding header field is present and the "chunked"
4771 * transfer-coding is not present, the transfer-length is defined by
4772 * the sender closing the connection.
4773 *
4774 * 3. If a Content-Length header field is present, its decimal value in
4775 * OCTETs represents both the entity-length and the transfer-length.
4776 * If a message is received with both a Transfer-Encoding header
4777 * field and a Content-Length header field, the latter MUST be ignored.
4778 *
4779 * 4. If the message uses the media type "multipart/byteranges", and
4780 * the transfer-length is not otherwise specified, then this self-
4781 * delimiting media type defines the transfer-length. This media
4782 * type MUST NOT be used unless the sender knows that the recipient
4783 * can parse it; the presence in a request of a Range header with
4784 * multiple byte-range specifiers from a 1.1 client implies that the
4785 * client can parse multipart/byteranges responses.
4786 *
4787 * 5. By the server closing the connection.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4788 */
4789
4790 /* Skip parsing if no content length is possible. The response flags
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]4791 * remain 0 as well as the chunk_len, which may or may not mirror
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4792 * the real header value, and we note that we know the response's length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4793 * FIXME: should we parse anyway and return an error on chunked encoding ?
4794 */
4795 if (txn->meth == HTTP_METH_HEAD ||
4796 (txn->status >= 100 && txn->status < 200) ||
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4797 txn->status == 204 || txn->status == 304) {
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4798 msg->flags |= HTTP_MSGF_XFER_LEN;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4799 goto skip_content_length;
4800 }
4801
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4802 use_close_only = 0;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4803 ctx.idx = 0;
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4804 while ((msg->flags & HTTP_MSGF_VER_11) &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]4805 http_find_header2("Transfer-Encoding", 17, rep->p + msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4806 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4807 msg->flags |= (HTTP_MSGF_TE_CHNK | HTTP_MSGF_XFER_LEN);
4808 else if (msg->flags & HTTP_MSGF_TE_CHNK) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4809 /* bad transfer-encoding (chunked followed by something else) */
4810 use_close_only = 1;
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4811 msg->flags &= ~(HTTP_MSGF_TE_CHNK | HTTP_MSGF_XFER_LEN);
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4812 break;
4813 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4814 }
4815
4816 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
4817 ctx.idx = 0;
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4818 while (!(msg->flags & HTTP_MSGF_TE_CHNK) && !use_close_only &&
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]4819 http_find_header2("Content-Length", 14, rep->p + msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4820 signed long long cl;
4821
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4822 if (!ctx.vlen) {
4823 msg->err_pos = ctx.line + ctx.val - rep->data;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4824 goto hdr_response_bad;
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4825 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4826
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4827 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl)) {
4828 msg->err_pos = ctx.line + ctx.val - rep->data;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4829 goto hdr_response_bad; /* parse failure */
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4830 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4831
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4832 if (cl < 0) {
4833 msg->err_pos = ctx.line + ctx.val - rep->data;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4834 goto hdr_response_bad;
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4835 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4836
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4837 if ((msg->flags & HTTP_MSGF_CNT_LEN) && (msg->chunk_len != cl)) {
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4838 msg->err_pos = ctx.line + ctx.val - rep->data;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4839 goto hdr_response_bad; /* already specified, was different */
Willy Tarreauad14f752011-09-02 20:33:27 +0200[diff] [blame]4840 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4841
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4842 msg->flags |= HTTP_MSGF_CNT_LEN | HTTP_MSGF_XFER_LEN;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]4843 msg->body_len = msg->chunk_len = cl;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4844 }
4845
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4846 /* FIXME: we should also implement the multipart/byterange method.
4847 * For now on, we resort to close mode in this case (unknown length).
4848 */
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4849skip_content_length:
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4850
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4851 /* end of job, return OK */
4852 rep->analysers &= ~an_bit;
4853 rep->analyse_exp = TICK_ETERNITY;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4854 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4855 return 1;
4856}
4857
4858/* This function performs all the processing enabled for the current response.
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]4859 * It normally returns 1 unless it wants to break. It relies on buffers flags,
4860 * and updates t->rep->analysers. It might make sense to explode it into several
4861 * other functions. It works like process_request (see indications above).
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4862 */
4863int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
4864{
4865 struct http_txn *txn = &t->txn;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4866 struct http_msg *msg = &txn->rsp;
4867 struct proxy *cur_proxy;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]4868 struct cond_wordlist *wl;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4869
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]4870 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4871 now_ms, __FUNCTION__,
4872 t,
4873 rep,
4874 rep->rex, rep->wex,
4875 rep->flags,
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]4876 rep->i,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4877 rep->analysers);
4878
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4879 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4880 return 0;
4881
4882 rep->analysers &= ~an_bit;
4883 rep->analyse_exp = TICK_ETERNITY;
4884
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4885 /* Now we have to check if we need to modify the Connection header.
4886 * This is more difficult on the response than it is on the request,
4887 * because we can have two different HTTP versions and we don't know
4888 * how the client will interprete a response. For instance, let's say
4889 * that the client sends a keep-alive request in HTTP/1.0 and gets an
4890 * HTTP/1.1 response without any header. Maybe it will bound itself to
4891 * HTTP/1.0 because it only knows about it, and will consider the lack
4892 * of header as a close, or maybe it knows HTTP/1.1 and can consider
4893 * the lack of header as a keep-alive. Thus we will use two flags
4894 * indicating how a request MAY be understood by the client. In case
4895 * of multiple possibilities, we'll fix the header to be explicit. If
4896 * ambiguous cases such as both close and keepalive are seen, then we
4897 * will fall back to explicit close. Note that we won't take risks with
4898 * HTTP/1.0 clients which may not necessarily understand keep-alive.
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4899 * See doc/internals/connection-header.txt for the complete matrix.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4900 */
4901
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4902 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
4903 txn->status == 101)) {
4904 /* Either we've established an explicit tunnel, or we're
4905 * switching the protocol. In both cases, we're very unlikely
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4906 * to understand the next protocols. We have to switch to tunnel
4907 * mode, so that we transfer the request and responses then let
4908 * this protocol pass unmodified. When we later implement specific
4909 * parsers for such protocols, we'll want to check the Upgrade
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4910 * header which contains information about that protocol for
4911 * responses with status 101 (eg: see RFC2817 about TLS).
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4912 */
4913 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
4914 }
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4915 else if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) &&
4916 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN ||
4917 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE))) {
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4918 int to_del = 0;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4919
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4920 /* on unknown transfer length, we must close */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4921 if (!(msg->flags & HTTP_MSGF_XFER_LEN) &&
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4922 (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
4923 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4924
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4925 /* now adjust header transformations depending on current state */
4926 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN ||
4927 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4928 to_del |= 2; /* remove "keep-alive" on any response */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4929 if (!(msg->flags & HTTP_MSGF_VER_11))
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4930 to_del |= 1; /* remove "close" for HTTP/1.0 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4931 }
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4932 else { /* SCL / KAL */
4933 to_del |= 1; /* remove "close" on any response */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4934 if (txn->req.flags & msg->flags & HTTP_MSGF_VER_11)
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4935 to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4936 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4937
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4938 /* Parse and remove some headers from the connection header */
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]4939 http_parse_connection_header(txn, msg, to_del);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4940
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4941 /* Some keep-alive responses are converted to Server-close if
4942 * the server wants to close.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4943 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4944 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) {
4945 if ((txn->flags & TX_HDR_CONN_CLO) ||
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]4946 (!(txn->flags & TX_HDR_CONN_KAL) && !(msg->flags & HTTP_MSGF_VER_11)))
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4947 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4948 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4949 }
4950
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4951 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4952 /*
4953 * 3: we will have to evaluate the filters.
4954 * As opposed to version 1.2, now they will be evaluated in the
4955 * filters order and not in the header order. This means that
4956 * each filter has to be validated among all headers.
4957 *
4958 * Filters are tried with ->be first, then with ->fe if it is
4959 * different from ->be.
4960 */
4961
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4962 cur_proxy = t->be;
4963 while (1) {
4964 struct proxy *rule_set = cur_proxy;
4965
4966 /* try headers filters */
4967 if (rule_set->rsp_exp != NULL) {
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]4968 if (apply_filters_to_response(t, rep, rule_set) < 0) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4969 return_bad_resp:
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4970 if (target_srv(&t->target)) {
4971 target_srv(&t->target)->counters.failed_resp++;
4972 health_adjust(target_srv(&t->target), HANA_STATUS_HTTP_RSP);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4973 }
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4974 t->be->be_counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4975 return_srv_prx_502:
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]4976 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4977 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4978 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200[diff] [blame]4979 bi_erase(rep);
Willy Tarreau8e89b842009-10-18 23:56:35 +0200[diff] [blame]4980 stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4981 if (!(t->flags & SN_ERR_MASK))
4982 t->flags |= SN_ERR_PRXCOND;
4983 if (!(t->flags & SN_FINST_MASK))
4984 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]4985 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4986 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4987 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4988
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4989 /* has the response been denied ? */
4990 if (txn->flags & TX_SVDENY) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4991 if (target_srv(&t->target))
4992 target_srv(&t->target)->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4993
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4994 t->be->be_counters.denied_resp++;
4995 t->fe->fe_counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4996 if (t->listener->counters)
4997 t->listener->counters->denied_resp++;
4998
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4999 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]5000 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5001
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5002 /* add response headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]5003 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]5004 if (txn->status < 200)
5005 break;
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5006 if (wl->cond) {
5007 int ret = acl_exec_cond(wl->cond, px, t, txn, ACL_DIR_RTR);
5008 ret = acl_pass(ret);
5009 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
5010 ret = !ret;
5011 if (!ret)
5012 continue;
5013 }
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]5014 if (unlikely(http_header_add_tail(&txn->rsp, &txn->hdr_idx, wl->s) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5015 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]5016 }
5017
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5018 /* check whether we're already working on the frontend */
5019 if (cur_proxy == t->fe)
5020 break;
5021 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5022 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5023
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5024 /*
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5025 * We may be facing a 100-continue response, in which case this
5026 * is not the right response, and we're waiting for the next one.
5027 * Let's allow this response to go to the client and wait for the
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5028 * next one.
5029 */
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5030 if (unlikely(txn->status == 100)) {
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5031 hdr_idx_init(&txn->hdr_idx);
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]5032 msg->next -= buffer_forward(rep, msg->next - msg->sol);
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5033 msg->msg_state = HTTP_MSG_RPBEFORE;
5034 txn->status = 0;
5035 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
5036 return 1;
5037 }
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5038 else if (unlikely(txn->status < 200))
5039 goto skip_header_mangling;
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5040
5041 /* we don't have any 1xx status code now */
5042
5043 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5044 * 4: check for server cookie.
5045 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5046 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name ||
5047 (t->be->options & PR_O_CHK_CACHE))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5048 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5049
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5050
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5051 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5052 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5053 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5054 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5055 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5056
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5057 /*
5058 * 6: add server cookie in the response if needed
5059 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5060 if (target_srv(&t->target) && (t->be->options & PR_O_COOK_INS) &&
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]5061 !((txn->flags & TX_SCK_FOUND) && (t->be->options2 & PR_O2_COOK_PSV)) &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5062 (!(t->flags & SN_DIRECT) ||
5063 ((t->be->cookie_maxidle || txn->cookie_last_date) &&
5064 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
5065 (t->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
5066 (!t->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]5067 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) &&
5068 !(t->flags & SN_IGNORE_PRST)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5069 int len;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5070 /* the server is known, it's not the one the client requested, or the
5071 * cookie's last seen date needs to be refreshed. We have to
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5072 * insert a set-cookie here, except if we want to insert only on POST
5073 * requests and this one isn't. Note that servers which don't have cookies
5074 * (eg: some backup servers) will return a full cookie removal request.
5075 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5076 if (!target_srv(&t->target)->cookie) {
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5077 len = sprintf(trash,
5078 "Set-Cookie: %s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
5079 t->be->cookie_name);
5080 }
5081 else {
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5082 len = sprintf(trash, "Set-Cookie: %s=%s", t->be->cookie_name, target_srv(&t->target)->cookie);
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5083
5084 if (t->be->cookie_maxidle || t->be->cookie_maxlife) {
5085 /* emit last_date, which is mandatory */
5086 trash[len++] = COOKIE_DELIM_DATE;
5087 s30tob64((date.tv_sec+3) >> 2, trash + len); len += 5;
5088 if (t->be->cookie_maxlife) {
5089 /* emit first_date, which is either the original one or
5090 * the current date.
5091 */
5092 trash[len++] = COOKIE_DELIM_DATE;
5093 s30tob64(txn->cookie_first_date ?
5094 txn->cookie_first_date >> 2 :
5095 (date.tv_sec+3) >> 2, trash + len);
5096 len += 5;
5097 }
5098 }
5099 len += sprintf(trash + len, "; path=/");
5100 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5101
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5102 if (t->be->cookie_domain)
5103 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5104
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]5105 if (unlikely(http_header_add_tail2(&txn->rsp, &txn->hdr_idx, trash, len) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5106 goto return_bad_resp;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5107
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5108 txn->flags &= ~TX_SCK_MASK;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5109 if (target_srv(&t->target)->cookie && (t->flags & SN_DIRECT))
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5110 /* the server did not change, only the date was updated */
5111 txn->flags |= TX_SCK_UPDATED;
5112 else
5113 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5114
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5115 /* Here, we will tell an eventual cache on the client side that we don't
5116 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
5117 * Some caches understand the correct form: 'no-cache="set-cookie"', but
5118 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
5119 */
5120 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5121
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5122 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
5123
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]5124 if (unlikely(http_header_add_tail2(&txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]5125 "Cache-control: private", 22) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5126 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5127 }
5128 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5129
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5130 /*
5131 * 7: check if result will be cacheable with a cookie.
5132 * We'll block the response if security checks have caught
5133 * nasty things such as a cacheable cookie.
5134 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5135 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
5136 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5137 (t->be->options & PR_O_CHK_CACHE)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5138
5139 /* we're in presence of a cacheable response containing
5140 * a set-cookie header. We'll block it as requested by
5141 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5142 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5143 if (target_srv(&t->target))
5144 target_srv(&t->target)->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5145
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5146 t->be->be_counters.denied_resp++;
5147 t->fe->fe_counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5148 if (t->listener->counters)
5149 t->listener->counters->denied_resp++;
5150
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5151 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5152 t->be->id, target_srv(&t->target) ? target_srv(&t->target)->id : "<dispatch>");
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5153 send_log(t->be, LOG_ALERT,
5154 "Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5155 t->be->id, target_srv(&t->target) ? target_srv(&t->target)->id : "<dispatch>");
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5156 goto return_srv_prx_502;
5157 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5158
5159 /*
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5160 * 8: adjust "Connection: close" or "Connection: keep-alive" if needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5161 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5162 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
5163 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE)) {
5164 unsigned int want_flags = 0;
5165
5166 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5167 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
5168 /* we want a keep-alive response here. Keep-alive header
5169 * required if either side is not 1.1.
5170 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]5171 if (!(txn->req.flags & msg->flags & HTTP_MSGF_VER_11))
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5172 want_flags |= TX_CON_KAL_SET;
5173 }
5174 else {
5175 /* we want a close response here. Close header required if
5176 * the server is 1.1, regardless of the client.
5177 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]5178 if (msg->flags & HTTP_MSGF_VER_11)
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5179 want_flags |= TX_CON_CLO_SET;
5180 }
5181
5182 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
Willy Tarreau6acf7c92012-03-09 13:30:45 +0100[diff] [blame]5183 http_change_connection_header(txn, msg, want_flags);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5184 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5185
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5186 skip_header_mangling:
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]5187 if ((msg->flags & HTTP_MSGF_XFER_LEN) ||
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5188 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5189 rep->analysers |= AN_RES_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]5190
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5191 /*************************************************************
5192 * OK, that's finished for the headers. We have done what we *
5193 * could. Let's switch to the DATA state. *
5194 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5195
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5196 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5197
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5198 /* if the user wants to log as soon as possible, without counting
5199 * bytes from the server, then this is the right moment. We have
5200 * to temporarily assign bytes_out to log what we currently have.
5201 */
5202 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
5203 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
5204 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]5205 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5206 t->logs.bytes_out = 0;
5207 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5208
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5209 /* Note: we must not try to cheat by jumping directly to DATA,
5210 * otherwise we would not let the client side wake up.
5211 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5212
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5213 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5214 }
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5215 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5216}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5217
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5218/* This function is an analyser which forwards response body (including chunk
5219 * sizes if any). It is called as soon as we must forward, even if we forward
5220 * zero byte. The only situation where it must not be called is when we're in
5221 * tunnel mode and we want to forward till the close. It's used both to forward
5222 * remaining data and to resync after end of body. It expects the msg_state to
5223 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
5224 * read more data, or 1 once we can go on with next request or end the session.
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5225 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5226 * bytes of pending data + the headers if not already done (between som and sov).
5227 * It eventually adjusts som to match sov after the data in between have been sent.
5228 */
5229int http_response_forward_body(struct session *s, struct buffer *res, int an_bit)
5230{
5231 struct http_txn *txn = &s->txn;
5232 struct http_msg *msg = &s->txn.rsp;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5233 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5234
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5235 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
5236 return 0;
5237
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5238 if ((res->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
Willy Tarreau2e046c62012-03-01 16:08:30 +0100[diff] [blame]5239 ((res->flags & BF_SHUTW) && (res->to_forward || res->o)) ||
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5240 !s->req->analysers) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5241 /* Output closed while we were sending data. We must abort and
5242 * wake the other side up.
5243 */
5244 msg->msg_state = HTTP_MSG_ERROR;
5245 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]5246 return 1;
5247 }
5248
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5249 /* in most states, we should abort in case of early close */
5250 buffer_auto_close(res);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5251
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5252 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaufa4a03c2012-03-09 21:28:54 +0100[diff] [blame]5253 /* we have msg->sov which points to the first byte of message body.
5254 * msg->som still points to the beginning of the message. We must
5255 * save the body in msg->next because it survives buffer re-alignments.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5256 */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]5257 msg->next = msg->sov;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]5258
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]5259 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5260 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
5261 else {
5262 msg->msg_state = HTTP_MSG_DATA;
5263 }
5264 }
5265
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5266 while (1) {
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5267 int bytes;
5268
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5269 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5270 /* we may have some data pending */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5271 bytes = msg->sov - msg->som;
5272 if (msg->chunk_len || bytes) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5273 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5274 if (likely(bytes < 0)) /* sov may have wrapped at the end */
5275 bytes += res->size;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]5276 msg->next -= bytes; /* will be forwarded */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5277 msg->chunk_len += (unsigned int)bytes;
5278 msg->chunk_len -= buffer_forward(res, msg->chunk_len);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5279 }
5280
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5281 if (msg->msg_state == HTTP_MSG_DATA) {
5282 /* must still forward */
5283 if (res->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5284 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5285
5286 /* nothing left to forward */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]5287 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5288 msg->msg_state = HTTP_MSG_DATA_CRLF;
5289 else
5290 msg->msg_state = HTTP_MSG_DONE;
5291 }
5292 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5293 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]5294 * set ->sov and ->next to point to the body and switch to DATA or
5295 * TRAILERS state.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5296 */
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]5297 int ret = http_parse_chunk_size(msg);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5298
5299 if (!ret)
5300 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5301 else if (ret < 0) {
5302 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]5303 http_capture_bad_message(&s->be->invalid_rep, s, msg, HTTP_MSG_CHUNK_SIZE, s->fe);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5304 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5305 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5306 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5307 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5308 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
5309 /* we want the CRLF after the data */
5310 int ret;
5311
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]5312 ret = http_skip_chunk_crlf(msg);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5313
5314 if (!ret)
5315 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5316 else if (ret < 0) {
5317 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]5318 http_capture_bad_message(&s->be->invalid_rep, s, msg, HTTP_MSG_DATA_CRLF, s->fe);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5319 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5320 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5321 /* we're in MSG_CHUNK_SIZE now */
5322 }
5323 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
Willy Tarreau4baf44b2012-03-09 14:10:20 +0100[diff] [blame]5324 int ret = http_forward_trailers(msg);
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5325
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5326 if (ret == 0)
5327 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5328 else if (ret < 0) {
5329 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]5330 http_capture_bad_message(&s->be->invalid_rep, s, msg, HTTP_MSG_TRAILERS, s->fe);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5331 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5332 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5333 /* we're in HTTP_MSG_DONE now */
5334 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5335 else {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5336 int old_state = msg->msg_state;
5337
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5338 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5339 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5340 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5341 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5342 buffer_dont_close(res);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5343 if (http_resync_states(s)) {
5344 http_silent_debug(__LINE__, s);
5345 /* some state changes occurred, maybe the analyser
5346 * was disabled too.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5347 */
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5348 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
5349 if (res->flags & BF_SHUTW) {
5350 /* response errors are most likely due to
5351 * the client aborting the transfer.
5352 */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5353 goto aborted_xfer;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5354 }
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5355 if (msg->err_pos >= 0)
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]5356 http_capture_bad_message(&s->be->invalid_rep, s, msg, old_state, s->fe);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5357 goto return_bad_res;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5358 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5359 return 1;
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5360 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5361 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5362 }
5363 }
5364
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5365 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5366 /* stop waiting for data if the input is closed before the end */
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5367 if (res->flags & BF_SHUTR) {
5368 if (!(s->flags & SN_ERR_MASK))
5369 s->flags |= SN_ERR_SRVCL;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5370 s->be->be_counters.srv_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5371 if (target_srv(&s->target))
5372 target_srv(&s->target)->counters.srv_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5373 goto return_bad_res_stats_ok;
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5374 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5375
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5376 if (res->flags & BF_SHUTW)
5377 goto aborted_xfer;
5378
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5379 /* we need to obey the req analyser, so if it leaves, we must too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5380 if (!s->req->analysers)
5381 goto return_bad_res;
5382
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5383 /* forward any pending data */
5384 bytes = msg->sov - msg->som;
5385 if (msg->chunk_len || bytes) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5386 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5387 if (likely(bytes < 0)) /* sov may have wrapped at the end */
5388 bytes += res->size;
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]5389 msg->next -= bytes; /* will be forwarded */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5390 msg->chunk_len += (unsigned int)bytes;
5391 msg->chunk_len -= buffer_forward(res, msg->chunk_len);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5392 }
5393
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5394 /* When TE: chunked is used, we need to get there again to parse remaining
5395 * chunks even if the server has closed, so we don't want to set BF_DONTCLOSE.
5396 * Similarly, with keep-alive on the client side, we don't want to forward a
5397 * close.
5398 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]5399 if ((msg->flags & HTTP_MSGF_TE_CHNK) ||
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5400 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5401 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5402 buffer_dont_close(res);
5403
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5404 /* We know that more data are expected, but we couldn't send more that
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]5405 * what we did. So we always set the BF_EXPECT_MORE flag so that the
5406 * system knows it must not set a PUSH on this first part. Interactive
Willy Tarreau869fc1e2012-03-05 08:29:20 +0100[diff] [blame]5407 * modes are already handled by the stream sock layer. We must not do
5408 * this in content-length mode because it could present the MSG_MORE
5409 * flag with the last block of forwarded data, which would cause an
5410 * additional delay to be observed by the receiver.
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5411 */
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]5412 if (msg->flags & HTTP_MSGF_TE_CHNK)
Willy Tarreau869fc1e2012-03-05 08:29:20 +0100[diff] [blame]5413 res->flags |= BF_EXPECT_MORE;
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5414
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5415 /* the session handler will take care of timeouts and errors */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5416 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5417 return 0;
5418
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5419 return_bad_res: /* let's centralize all bad responses */
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5420 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5421 if (target_srv(&s->target))
5422 target_srv(&s->target)->counters.failed_resp++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5423
5424 return_bad_res_stats_ok:
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5425 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]5426 /* don't send any error message as we're in the body */
5427 stream_int_retnclose(res->cons, NULL);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5428 res->analysers = 0;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5429 s->req->analysers = 0; /* we're in data phase, we want to abort both directions */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5430 if (target_srv(&s->target))
5431 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_HDRRSP);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5432
5433 if (!(s->flags & SN_ERR_MASK))
5434 s->flags |= SN_ERR_PRXCOND;
5435 if (!(s->flags & SN_FINST_MASK))
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5436 s->flags |= SN_FINST_D;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5437 return 0;
5438
5439 aborted_xfer:
5440 txn->rsp.msg_state = HTTP_MSG_ERROR;
5441 /* don't send any error message as we're in the body */
5442 stream_int_retnclose(res->cons, NULL);
5443 res->analysers = 0;
5444 s->req->analysers = 0; /* we're in data phase, we want to abort both directions */
5445
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5446 s->fe->fe_counters.cli_aborts++;
5447 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5448 if (target_srv(&s->target))
5449 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5450
5451 if (!(s->flags & SN_ERR_MASK))
5452 s->flags |= SN_ERR_CLICL;
5453 if (!(s->flags & SN_FINST_MASK))
5454 s->flags |= SN_FINST_D;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5455 return 0;
5456}
5457
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5458/* Iterate the same filter through all request headers.
5459 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5460 * Since it can manage the switch to another backend, it updates the per-proxy
5461 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5462 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5463int apply_filter_to_req_headers(struct session *t, struct buffer *req, struct hdr_exp *exp)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5464{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5465 char term;
5466 char *cur_ptr, *cur_end, *cur_next;
5467 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5468 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5469 struct hdr_idx_elem *cur_hdr;
5470 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]5471
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5472 last_hdr = 0;
5473
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]5474 cur_next = req->p + txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5475 old_idx = 0;
5476
5477 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5478 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5479 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5480 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5481 (exp->action == ACT_ALLOW ||
5482 exp->action == ACT_DENY ||
5483 exp->action == ACT_TARPIT))
5484 return 0;
5485
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5486 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5487 if (!cur_idx)
5488 break;
5489
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5490 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5491 cur_ptr = cur_next;
5492 cur_end = cur_ptr + cur_hdr->len;
5493 cur_next = cur_end + cur_hdr->cr + 1;
5494
5495 /* Now we have one header between cur_ptr and cur_end,
5496 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5497 */
5498
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5499 /* The annoying part is that pattern matching needs
5500 * that we modify the contents to null-terminate all
5501 * strings before testing them.
5502 */
5503
5504 term = *cur_end;
5505 *cur_end = '\0';
5506
5507 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5508 switch (exp->action) {
5509 case ACT_SETBE:
5510 /* It is not possible to jump a second time.
5511 * FIXME: should we return an HTTP/500 here so that
5512 * the admin knows there's a problem ?
5513 */
5514 if (t->be != t->fe)
5515 break;
5516
5517 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5518 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5519 last_hdr = 1;
5520 break;
5521
5522 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5523 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5524 last_hdr = 1;
5525 break;
5526
5527 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5528 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5529 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5530
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5531 t->fe->fe_counters.denied_req++;
5532 if (t->fe != t->be)
5533 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5534 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5535 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5536
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5537 break;
5538
5539 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5540 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5541 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5542
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5543 t->fe->fe_counters.denied_req++;
5544 if (t->fe != t->be)
5545 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5546 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5547 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5548
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5549 break;
5550
5551 case ACT_REPLACE:
5552 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5553 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5554 /* FIXME: if the user adds a newline in the replacement, the
5555 * index will not be recalculated for now, and the new line
5556 * will not be counted as a new header.
5557 */
5558
5559 cur_end += delta;
5560 cur_next += delta;
5561 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5562 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5563 break;
5564
5565 case ACT_REMOVE:
5566 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
5567 cur_next += delta;
5568
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5569 http_msg_move_end(&txn->req, delta);
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5570 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5571 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5572 cur_hdr->len = 0;
5573 cur_end = NULL; /* null-term has been rewritten */
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]5574 cur_idx = old_idx;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5575 break;
5576
5577 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5578 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5579 if (cur_end)
5580 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5581
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5582 /* keep the link from this header to next one in case of later
5583 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5584 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5585 old_idx = cur_idx;
5586 }
5587 return 0;
5588}
5589
5590
5591/* Apply the filter to the request line.
5592 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5593 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5594 * Since it can manage the switch to another backend, it updates the per-proxy
5595 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5596 */
5597int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
5598{
5599 char term;
5600 char *cur_ptr, *cur_end;
5601 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5602 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5603 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5604
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5605
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5606 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5607 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5608 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5609 (exp->action == ACT_ALLOW ||
5610 exp->action == ACT_DENY ||
5611 exp->action == ACT_TARPIT))
5612 return 0;
5613 else if (exp->action == ACT_REMOVE)
5614 return 0;
5615
5616 done = 0;
5617
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]5618 cur_ptr = req->p + txn->req.sol;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5619 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5620
5621 /* Now we have the request line between cur_ptr and cur_end */
5622
5623 /* The annoying part is that pattern matching needs
5624 * that we modify the contents to null-terminate all
5625 * strings before testing them.
5626 */
5627
5628 term = *cur_end;
5629 *cur_end = '\0';
5630
5631 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5632 switch (exp->action) {
5633 case ACT_SETBE:
5634 /* It is not possible to jump a second time.
5635 * FIXME: should we return an HTTP/500 here so that
5636 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5637 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5638 if (t->be != t->fe)
5639 break;
5640
5641 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5642 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5643 done = 1;
5644 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5645
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5646 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5647 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5648 done = 1;
5649 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5650
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5651 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5652 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5653
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5654 t->fe->fe_counters.denied_req++;
5655 if (t->fe != t->be)
5656 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5657 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5658 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5659
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5660 done = 1;
5661 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5662
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5663 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5664 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5665
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5666 t->fe->fe_counters.denied_req++;
5667 if (t->fe != t->be)
5668 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5669 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5670 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5671
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5672 done = 1;
5673 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5674
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5675 case ACT_REPLACE:
5676 *cur_end = term; /* restore the string terminator */
5677 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5678 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5679 /* FIXME: if the user adds a newline in the replacement, the
5680 * index will not be recalculated for now, and the new line
5681 * will not be counted as a new header.
5682 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5683
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5684 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5685 cur_end += delta;
Willy Tarreau62f791e2012-03-09 11:32:30 +0100[diff] [blame]5686 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5687 HTTP_MSG_RQMETH,
5688 cur_ptr, cur_end + 1,
5689 NULL, NULL);
5690 if (unlikely(!cur_end))
5691 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5692
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5693 /* we have a full request and we know that we have either a CR
5694 * or an LF at <ptr>.
5695 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5696 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
5697 hdr_idx_set_start(&txn->hdr_idx, txn->req.sl.rq.l, *cur_end == '\r');
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5698 /* there is no point trying this regex on headers */
5699 return 1;
5700 }
5701 }
5702 *cur_end = term; /* restore the string terminator */
5703 return done;
5704}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]5705
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5706
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5707
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5708/*
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5709 * Apply all the req filters of proxy <px> to all headers in buffer <req> of session <s>.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5710 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5711 * unparsable request. Since it can manage the switch to another backend, it
5712 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5713 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5714int apply_filters_to_request(struct session *s, struct buffer *req, struct proxy *px)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5715{
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5716 struct http_txn *txn = &s->txn;
5717 struct hdr_exp *exp;
5718
5719 for (exp = px->req_exp; exp; exp = exp->next) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5720 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5721
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5722 /*
5723 * The interleaving of transformations and verdicts
5724 * makes it difficult to decide to continue or stop
5725 * the evaluation.
5726 */
5727
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5728 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
5729 break;
5730
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5731 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5732 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5733 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5734 continue;
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5735
5736 /* if this filter had a condition, evaluate it now and skip to
5737 * next filter if the condition does not match.
5738 */
5739 if (exp->cond) {
5740 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_REQ);
5741 ret = acl_pass(ret);
5742 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
5743 ret = !ret;
5744
5745 if (!ret)
5746 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5747 }
5748
5749 /* Apply the filter to the request line. */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5750 ret = apply_filter_to_req_line(s, req, exp);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5751 if (unlikely(ret < 0))
5752 return -1;
5753
5754 if (likely(ret == 0)) {
5755 /* The filter did not match the request, it can be
5756 * iterated through all headers.
5757 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5758 apply_filter_to_req_headers(s, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5759 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5760 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5761 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5762}
5763
5764
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5765
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5766/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5767 * Try to retrieve the server associated to the appsession.
5768 * If the server is found, it's assigned to the session.
5769 */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5770void manage_client_side_appsession(struct session *t, const char *buf, int len) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5771 struct http_txn *txn = &t->txn;
5772 appsess *asession = NULL;
5773 char *sessid_temp = NULL;
5774
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5775 if (len > t->be->appsession_len) {
5776 len = t->be->appsession_len;
5777 }
5778
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5779 if (t->be->options2 & PR_O2_AS_REQL) {
5780 /* request-learn option is enabled : store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5781 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5782 /* free previously allocated memory as we don't need the session id found in the URL anymore */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5783 pool_free2(apools.sessid, txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5784 }
5785
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5786 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5787 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5788 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5789 return;
5790 }
5791
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5792 memcpy(txn->sessid, buf, len);
5793 txn->sessid[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5794 }
5795
5796 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
5797 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5798 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5799 return;
5800 }
5801
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5802 memcpy(sessid_temp, buf, len);
5803 sessid_temp[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5804
5805 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
5806 /* free previously allocated memory */
5807 pool_free2(apools.sessid, sessid_temp);
5808
5809 if (asession != NULL) {
5810 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
5811 if (!(t->be->options2 & PR_O2_AS_REQL))
5812 asession->request_count++;
5813
5814 if (asession->serverid != NULL) {
5815 struct server *srv = t->be->srv;
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]5816
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5817 while (srv) {
5818 if (strcmp(srv->id, asession->serverid) == 0) {
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]5819 if ((srv->state & SRV_RUNNING) ||
5820 (t->be->options & PR_O_PERSIST) ||
5821 (t->flags & SN_FORCE_PRST)) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5822 /* we found the server and it's usable */
5823 txn->flags &= ~TX_CK_MASK;
Willy Tarreau2a6d88d2010-01-24 13:10:43 +0100[diff] [blame]5824 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5825 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]5826 set_target_server(&t->target, srv);
Willy Tarreau664beb82011-03-10 11:38:29 +0100[diff] [blame]5827
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5828 break;
5829 } else {
5830 txn->flags &= ~TX_CK_MASK;
5831 txn->flags |= TX_CK_DOWN;
5832 }
5833 }
5834 srv = srv->next;
5835 }
5836 }
5837 }
5838}
5839
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5840/* Find the end of a cookie value contained between <s> and <e>. It works the
5841 * same way as with headers above except that the semi-colon also ends a token.
5842 * See RFC2965 for more information. Note that it requires a valid header to
5843 * return a valid result.
5844 */
5845char *find_cookie_value_end(char *s, const char *e)
5846{
5847 int quoted, qdpair;
5848
5849 quoted = qdpair = 0;
5850 for (; s < e; s++) {
5851 if (qdpair) qdpair = 0;
5852 else if (quoted) {
5853 if (*s == '\\') qdpair = 1;
5854 else if (*s == '"') quoted = 0;
5855 }
5856 else if (*s == '"') quoted = 1;
5857 else if (*s == ',' || *s == ';') return s;
5858 }
5859 return s;
5860}
5861
5862/* Delete a value in a header between delimiters <from> and <next> in buffer
5863 * <buf>. The number of characters displaced is returned, and the pointer to
5864 * the first delimiter is updated if required. The function tries as much as
5865 * possible to respect the following principles :
5866 * - replace <from> delimiter by the <next> one unless <from> points to a
5867 * colon, in which case <next> is simply removed
5868 * - set exactly one space character after the new first delimiter, unless
5869 * there are not enough characters in the block being moved to do so.
5870 * - remove unneeded spaces before the previous delimiter and after the new
5871 * one.
5872 *
5873 * It is the caller's responsibility to ensure that :
5874 * - <from> points to a valid delimiter or the colon ;
5875 * - <next> points to a valid delimiter or the final CR/LF ;
5876 * - there are non-space chars before <from> ;
5877 * - there is a CR/LF at or after <next>.
5878 */
5879int del_hdr_value(struct buffer *buf, char **from, char *next)
5880{
5881 char *prev = *from;
5882
5883 if (*prev == ':') {
5884 /* We're removing the first value, preserve the colon and add a
5885 * space if possible.
5886 */
5887 if (!http_is_crlf[(unsigned char)*next])
5888 next++;
5889 prev++;
5890 if (prev < next)
5891 *prev++ = ' ';
5892
5893 while (http_is_spht[(unsigned char)*next])
5894 next++;
5895 } else {
5896 /* Remove useless spaces before the old delimiter. */
5897 while (http_is_spht[(unsigned char)*(prev-1)])
5898 prev--;
5899 *from = prev;
5900
5901 /* copy the delimiter and if possible a space if we're
5902 * not at the end of the line.
5903 */
5904 if (!http_is_crlf[(unsigned char)*next]) {
5905 *prev++ = *next++;
5906 if (prev + 1 < next)
5907 *prev++ = ' ';
5908 while (http_is_spht[(unsigned char)*next])
5909 next++;
5910 }
5911 }
5912 return buffer_replace2(buf, prev, next, NULL, 0);
5913}
5914
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5915/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]5916 * Manage client-side cookie. It can impact performance by about 2% so it is
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5917 * desirable to call it only when needed. This code is quite complex because
5918 * of the multiple very crappy and ambiguous syntaxes we have to support. it
5919 * highly recommended not to touch this part without a good reason !
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5920 */
5921void manage_client_side_cookies(struct session *t, struct buffer *req)
5922{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5923 struct http_txn *txn = &t->txn;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5924 int preserve_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5925 int cur_idx, old_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5926 char *hdr_beg, *hdr_end, *hdr_next, *del_from;
5927 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5928
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5929 /* Iterate through the headers, we start with the start line. */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]5930 old_idx = 0;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]5931 hdr_next = req->p + txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5932
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5933 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5934 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5935 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5936
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5937 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5938 hdr_beg = hdr_next;
5939 hdr_end = hdr_beg + cur_hdr->len;
5940 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5941
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5942 /* We have one full header between hdr_beg and hdr_end, and the
5943 * next header starts at hdr_next. We're only interested in
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5944 * "Cookie:" headers.
5945 */
5946
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5947 val = http_header_match2(hdr_beg, hdr_end, "Cookie", 6);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5948 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5949 old_idx = cur_idx;
5950 continue;
5951 }
5952
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5953 del_from = NULL; /* nothing to be deleted */
5954 preserve_hdr = 0; /* assume we may kill the whole header */
5955
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5956 /* Now look for cookies. Conforming to RFC2109, we have to support
5957 * attributes whose name begin with a '$', and associate them with
5958 * the right cookie, if we want to delete this cookie.
5959 * So there are 3 cases for each cookie read :
5960 * 1) it's a special attribute, beginning with a '$' : ignore it.
5961 * 2) it's a server id cookie that we *MAY* want to delete : save
5962 * some pointers on it (last semi-colon, beginning of cookie...)
5963 * 3) it's an application cookie : we *MAY* have to delete a previous
5964 * "special" cookie.
5965 * At the end of loop, if a "special" cookie remains, we may have to
5966 * remove it. If no application cookie persists in the header, we
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5967 * *MUST* delete it.
5968 *
5969 * Note: RFC2965 is unclear about the processing of spaces around
5970 * the equal sign in the ATTR=VALUE form. A careful inspection of
5971 * the RFC explicitly allows spaces before it, and not within the
5972 * tokens (attrs or values). An inspection of RFC2109 allows that
5973 * too but section 10.1.3 lets one think that spaces may be allowed
5974 * after the equal sign too, resulting in some (rare) buggy
5975 * implementations trying to do that. So let's do what servers do.
5976 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
5977 * allowed quoted strings in values, with any possible character
5978 * after a backslash, including control chars and delimitors, which
5979 * causes parsing to become ambiguous. Browsers also allow spaces
5980 * within values even without quotes.
5981 *
5982 * We have to keep multiple pointers in order to support cookie
5983 * removal at the beginning, middle or end of header without
5984 * corrupting the header. All of these headers are valid :
5985 *
5986 * Cookie:NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3\r\n
5987 * Cookie:NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3\r\n
5988 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
5989 * | | | | | | | | |
5990 * | | | | | | | | hdr_end <--+
5991 * | | | | | | | +--> next
5992 * | | | | | | +----> val_end
5993 * | | | | | +-----------> val_beg
5994 * | | | | +--------------> equal
5995 * | | | +----------------> att_end
5996 * | | +---------------------> att_beg
5997 * | +--------------------------> prev
5998 * +--------------------------------> hdr_beg
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5999 */
6000
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6001 for (prev = hdr_beg + 6; prev < hdr_end; prev = next) {
6002 /* Iterate through all cookies on this line */
6003
6004 /* find att_beg */
6005 att_beg = prev + 1;
6006 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6007 att_beg++;
6008
6009 /* find att_end : this is the first character after the last non
6010 * space before the equal. It may be equal to hdr_end.
6011 */
6012 equal = att_end = att_beg;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6013
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6014 while (equal < hdr_end) {
6015 if (*equal == '=' || *equal == ',' || *equal == ';')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6016 break;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6017 if (http_is_spht[(unsigned char)*equal++])
6018 continue;
6019 att_end = equal;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6020 }
6021
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6022 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6023 * is between <att_beg> and <equal>, both may be identical.
6024 */
6025
6026 /* look for end of cookie if there is an equal sign */
6027 if (equal < hdr_end && *equal == '=') {
6028 /* look for the beginning of the value */
6029 val_beg = equal + 1;
6030 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6031 val_beg++;
6032
6033 /* find the end of the value, respecting quotes */
6034 next = find_cookie_value_end(val_beg, hdr_end);
6035
6036 /* make val_end point to the first white space or delimitor after the value */
6037 val_end = next;
6038 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6039 val_end--;
6040 } else {
6041 val_beg = val_end = next = equal;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6042 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6043
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6044 /* We have nothing to do with attributes beginning with '$'. However,
6045 * they will automatically be removed if a header before them is removed,
6046 * since they're supposed to be linked together.
6047 */
6048 if (*att_beg == '$')
6049 continue;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6050
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6051 /* Ignore cookies with no equal sign */
6052 if (equal == next) {
6053 /* This is not our cookie, so we must preserve it. But if we already
6054 * scheduled another cookie for removal, we cannot remove the
6055 * complete header, but we can remove the previous block itself.
6056 */
6057 preserve_hdr = 1;
6058 if (del_from != NULL) {
6059 int delta = del_hdr_value(req, &del_from, prev);
6060 val_end += delta;
6061 next += delta;
6062 hdr_end += delta;
6063 hdr_next += delta;
6064 cur_hdr->len += delta;
6065 http_msg_move_end(&txn->req, delta);
6066 prev = del_from;
6067 del_from = NULL;
6068 }
6069 continue;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6070 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6071
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6072 /* if there are spaces around the equal sign, we need to
6073 * strip them otherwise we'll get trouble for cookie captures,
6074 * or even for rewrites. Since this happens extremely rarely,
6075 * it does not hurt performance.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6076 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6077 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6078 int stripped_before = 0;
6079 int stripped_after = 0;
6080
6081 if (att_end != equal) {
6082 stripped_before = buffer_replace2(req, att_end, equal, NULL, 0);
6083 equal += stripped_before;
6084 val_beg += stripped_before;
6085 }
6086
6087 if (val_beg > equal + 1) {
6088 stripped_after = buffer_replace2(req, equal + 1, val_beg, NULL, 0);
6089 val_beg += stripped_after;
6090 stripped_before += stripped_after;
6091 }
6092
6093 val_end += stripped_before;
6094 next += stripped_before;
6095 hdr_end += stripped_before;
6096 hdr_next += stripped_before;
6097 cur_hdr->len += stripped_before;
6098 http_msg_move_end(&txn->req, stripped_before);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6099 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6100 /* now everything is as on the diagram above */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6101
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6102 /* First, let's see if we want to capture this cookie. We check
6103 * that we don't already have a client side cookie, because we
6104 * can only capture one. Also as an optimisation, we ignore
6105 * cookies shorter than the declared name.
6106 */
6107 if (t->fe->capture_name != NULL && txn->cli_cookie == NULL &&
6108 (val_end - att_beg >= t->fe->capture_namelen) &&
6109 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6110 int log_len = val_end - att_beg;
6111
6112 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
6113 Alert("HTTP logging : out of memory.\n");
6114 } else {
6115 if (log_len > t->fe->capture_len)
6116 log_len = t->fe->capture_len;
6117 memcpy(txn->cli_cookie, att_beg, log_len);
6118 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6119 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6120 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6121
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6122 /* Persistence cookies in passive, rewrite or insert mode have the
6123 * following form :
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6124 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6125 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6126 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6127 * For cookies in prefix mode, the form is :
6128 *
6129 * Cookie: NAME=SRV~VALUE
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6130 */
6131 if ((att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6132 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
6133 struct server *srv = t->be->srv;
6134 char *delim;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6135
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6136 /* if we're in cookie prefix mode, we'll search the delimitor so that we
6137 * have the server ID between val_beg and delim, and the original cookie between
6138 * delim+1 and val_end. Otherwise, delim==val_end :
6139 *
6140 * Cookie: NAME=SRV; # in all but prefix modes
6141 * Cookie: NAME=SRV~OPAQUE ; # in prefix mode
6142 * | || || | |+-> next
6143 * | || || | +--> val_end
6144 * | || || +---------> delim
6145 * | || |+------------> val_beg
6146 * | || +-------------> att_end = equal
6147 * | |+-----------------> att_beg
6148 * | +------------------> prev
6149 * +-------------------------> hdr_beg
6150 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6151
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6152 if (t->be->options & PR_O_COOK_PFX) {
6153 for (delim = val_beg; delim < val_end; delim++)
6154 if (*delim == COOKIE_DELIM)
6155 break;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6156 } else {
6157 char *vbar1;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6158 delim = val_end;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6159 /* Now check if the cookie contains a date field, which would
6160 * appear after a vertical bar ('|') just after the server name
6161 * and before the delimiter.
6162 */
6163 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
6164 if (vbar1) {
6165 /* OK, so left of the bar is the server's cookie and
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6166 * right is the last seen date. It is a base64 encoded
6167 * 30-bit value representing the UNIX date since the
6168 * epoch in 4-second quantities.
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6169 */
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6170 int val;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6171 delim = vbar1++;
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6172 if (val_end - vbar1 >= 5) {
6173 val = b64tos30(vbar1);
6174 if (val > 0)
6175 txn->cookie_last_date = val << 2;
6176 }
6177 /* look for a second vertical bar */
6178 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
6179 if (vbar1 && (val_end - vbar1 > 5)) {
6180 val = b64tos30(vbar1 + 1);
6181 if (val > 0)
6182 txn->cookie_first_date = val << 2;
6183 }
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6184 }
6185 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6186
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6187 /* if the cookie has an expiration date and the proxy wants to check
6188 * it, then we do that now. We first check if the cookie is too old,
6189 * then only if it has expired. We detect strict overflow because the
6190 * time resolution here is not great (4 seconds). Cookies with dates
6191 * in the future are ignored if their offset is beyond one day. This
6192 * allows an admin to fix timezone issues without expiring everyone
6193 * and at the same time avoids keeping unwanted side effects for too
6194 * long.
6195 */
6196 if (txn->cookie_first_date && t->be->cookie_maxlife &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6197 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)t->be->cookie_maxlife) ||
6198 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6199 txn->flags &= ~TX_CK_MASK;
6200 txn->flags |= TX_CK_OLD;
6201 delim = val_beg; // let's pretend we have not found the cookie
6202 txn->cookie_first_date = 0;
6203 txn->cookie_last_date = 0;
6204 }
6205 else if (txn->cookie_last_date && t->be->cookie_maxidle &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6206 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)t->be->cookie_maxidle) ||
6207 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6208 txn->flags &= ~TX_CK_MASK;
6209 txn->flags |= TX_CK_EXPIRED;
6210 delim = val_beg; // let's pretend we have not found the cookie
6211 txn->cookie_first_date = 0;
6212 txn->cookie_last_date = 0;
6213 }
6214
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6215 /* Here, we'll look for the first running server which supports the cookie.
6216 * This allows to share a same cookie between several servers, for example
6217 * to dedicate backup servers to specific servers only.
6218 * However, to prevent clients from sticking to cookie-less backup server
6219 * when they have incidentely learned an empty cookie, we simply ignore
6220 * empty cookies and mark them as invalid.
6221 * The same behaviour is applied when persistence must be ignored.
6222 */
Willy Tarreau4a5cade2012-04-05 21:09:48 +0200[diff] [blame]6223 if ((delim == val_beg) || (t->flags & (SN_IGNORE_PRST | SN_ASSIGNED)))
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6224 srv = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6225
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6226 while (srv) {
6227 if (srv->cookie && (srv->cklen == delim - val_beg) &&
6228 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
6229 if ((srv->state & SRV_RUNNING) ||
6230 (t->be->options & PR_O_PERSIST) ||
6231 (t->flags & SN_FORCE_PRST)) {
6232 /* we found the server and we can use it */
6233 txn->flags &= ~TX_CK_MASK;
6234 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
6235 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]6236 set_target_server(&t->target, srv);
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6237 break;
6238 } else {
6239 /* we found a server, but it's down,
6240 * mark it as such and go on in case
6241 * another one is available.
6242 */
6243 txn->flags &= ~TX_CK_MASK;
6244 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6245 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6246 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6247 srv = srv->next;
6248 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6249
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6250 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
Willy Tarreauc89ccb62012-04-05 21:18:22 +0200[diff] [blame]6251 /* no server matched this cookie or we deliberately skipped it */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6252 txn->flags &= ~TX_CK_MASK;
Willy Tarreauc89ccb62012-04-05 21:18:22 +0200[diff] [blame]6253 if ((t->flags & (SN_IGNORE_PRST | SN_ASSIGNED)))
6254 txn->flags |= TX_CK_UNUSED;
6255 else
6256 txn->flags |= TX_CK_INVALID;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6257 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6258
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6259 /* depending on the cookie mode, we may have to either :
6260 * - delete the complete cookie if we're in insert+indirect mode, so that
6261 * the server never sees it ;
6262 * - remove the server id from the cookie value, and tag the cookie as an
6263 * application cookie so that it does not get accidentely removed later,
6264 * if we're in cookie prefix mode
6265 */
6266 if ((t->be->options & PR_O_COOK_PFX) && (delim != val_end)) {
6267 int delta; /* negative */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6268
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6269 delta = buffer_replace2(req, val_beg, delim + 1, NULL, 0);
6270 val_end += delta;
6271 next += delta;
6272 hdr_end += delta;
6273 hdr_next += delta;
6274 cur_hdr->len += delta;
6275 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6276
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6277 del_from = NULL;
6278 preserve_hdr = 1; /* we want to keep this cookie */
6279 }
6280 else if (del_from == NULL &&
6281 (t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) {
6282 del_from = prev;
6283 }
6284 } else {
6285 /* This is not our cookie, so we must preserve it. But if we already
6286 * scheduled another cookie for removal, we cannot remove the
6287 * complete header, but we can remove the previous block itself.
6288 */
6289 preserve_hdr = 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6290
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6291 if (del_from != NULL) {
6292 int delta = del_hdr_value(req, &del_from, prev);
Willy Tarreaub8105542010-11-24 18:31:28 +0100[diff] [blame]6293 if (att_beg >= del_from)
6294 att_beg += delta;
6295 if (att_end >= del_from)
6296 att_end += delta;
6297 val_beg += delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6298 val_end += delta;
6299 next += delta;
6300 hdr_end += delta;
6301 hdr_next += delta;
6302 cur_hdr->len += delta;
6303 http_msg_move_end(&txn->req, delta);
6304 prev = del_from;
6305 del_from = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6306 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6307 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6308
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6309 /* Look for the appsession cookie unless persistence must be ignored */
6310 if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
6311 int cmp_len, value_len;
6312 char *value_begin;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]6313
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6314 if (t->be->options2 & PR_O2_AS_PFX) {
6315 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6316 value_begin = att_beg + t->be->appsession_name_len;
6317 value_len = val_end - att_beg - t->be->appsession_name_len;
6318 } else {
6319 cmp_len = att_end - att_beg;
6320 value_begin = val_beg;
6321 value_len = val_end - val_beg;
6322 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6323
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6324 /* let's see if the cookie is our appcookie */
6325 if (cmp_len == t->be->appsession_name_len &&
6326 memcmp(att_beg, t->be->appsession_name, cmp_len) == 0) {
6327 manage_client_side_appsession(t, value_begin, value_len);
6328 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6329 }
6330
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6331 /* continue with next cookie on this header line */
6332 att_beg = next;
6333 } /* for each cookie */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6334
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6335 /* There are no more cookies on this line.
6336 * We may still have one (or several) marked for deletion at the
6337 * end of the line. We must do this now in two ways :
6338 * - if some cookies must be preserved, we only delete from the
6339 * mark to the end of line ;
6340 * - if nothing needs to be preserved, simply delete the whole header
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6341 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6342 if (del_from) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6343 int delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6344 if (preserve_hdr) {
6345 delta = del_hdr_value(req, &del_from, hdr_end);
6346 hdr_end = del_from;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6347 cur_hdr->len += delta;
6348 } else {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6349 delta = buffer_replace2(req, hdr_beg, hdr_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6350
6351 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6352 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6353 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6354 cur_hdr->len = 0;
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]6355 cur_idx = old_idx;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6356 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6357 hdr_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6358 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6359 }
6360
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6361 /* check next header */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6362 old_idx = cur_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6363 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6364}
6365
6366
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6367/* Iterate the same filter through all response headers contained in <rtr>.
6368 * Returns 1 if this filter can be stopped upon return, otherwise 0.
6369 */
6370int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6371{
6372 char term;
6373 char *cur_ptr, *cur_end, *cur_next;
6374 int cur_idx, old_idx, last_hdr;
6375 struct http_txn *txn = &t->txn;
6376 struct hdr_idx_elem *cur_hdr;
6377 int len, delta;
6378
6379 last_hdr = 0;
6380
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]6381 cur_next = rtr->p + txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6382 old_idx = 0;
6383
6384 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6385 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6386 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6387 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6388 (exp->action == ACT_ALLOW ||
6389 exp->action == ACT_DENY))
6390 return 0;
6391
6392 cur_idx = txn->hdr_idx.v[old_idx].next;
6393 if (!cur_idx)
6394 break;
6395
6396 cur_hdr = &txn->hdr_idx.v[cur_idx];
6397 cur_ptr = cur_next;
6398 cur_end = cur_ptr + cur_hdr->len;
6399 cur_next = cur_end + cur_hdr->cr + 1;
6400
6401 /* Now we have one header between cur_ptr and cur_end,
6402 * and the next header starts at cur_next.
6403 */
6404
6405 /* The annoying part is that pattern matching needs
6406 * that we modify the contents to null-terminate all
6407 * strings before testing them.
6408 */
6409
6410 term = *cur_end;
6411 *cur_end = '\0';
6412
6413 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6414 switch (exp->action) {
6415 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6416 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6417 last_hdr = 1;
6418 break;
6419
6420 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6421 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6422 last_hdr = 1;
6423 break;
6424
6425 case ACT_REPLACE:
6426 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6427 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6428 /* FIXME: if the user adds a newline in the replacement, the
6429 * index will not be recalculated for now, and the new line
6430 * will not be counted as a new header.
6431 */
6432
6433 cur_end += delta;
6434 cur_next += delta;
6435 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6436 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6437 break;
6438
6439 case ACT_REMOVE:
6440 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
6441 cur_next += delta;
6442
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6443 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6444 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6445 txn->hdr_idx.used--;
6446 cur_hdr->len = 0;
6447 cur_end = NULL; /* null-term has been rewritten */
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]6448 cur_idx = old_idx;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6449 break;
6450
6451 }
6452 }
6453 if (cur_end)
6454 *cur_end = term; /* restore the string terminator */
6455
6456 /* keep the link from this header to next one in case of later
6457 * removal of next header.
6458 */
6459 old_idx = cur_idx;
6460 }
6461 return 0;
6462}
6463
6464
6465/* Apply the filter to the status line in the response buffer <rtr>.
6466 * Returns 0 if nothing has been done, 1 if the filter has been applied,
6467 * or -1 if a replacement resulted in an invalid status line.
6468 */
6469int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6470{
6471 char term;
6472 char *cur_ptr, *cur_end;
6473 int done;
6474 struct http_txn *txn = &t->txn;
6475 int len, delta;
6476
6477
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6478 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6479 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6480 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6481 (exp->action == ACT_ALLOW ||
6482 exp->action == ACT_DENY))
6483 return 0;
6484 else if (exp->action == ACT_REMOVE)
6485 return 0;
6486
6487 done = 0;
6488
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]6489 cur_ptr = rtr->p + txn->rsp.sol;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]6490 cur_end = cur_ptr + txn->rsp.sl.st.l;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6491
6492 /* Now we have the status line between cur_ptr and cur_end */
6493
6494 /* The annoying part is that pattern matching needs
6495 * that we modify the contents to null-terminate all
6496 * strings before testing them.
6497 */
6498
6499 term = *cur_end;
6500 *cur_end = '\0';
6501
6502 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6503 switch (exp->action) {
6504 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6505 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6506 done = 1;
6507 break;
6508
6509 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6510 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6511 done = 1;
6512 break;
6513
6514 case ACT_REPLACE:
6515 *cur_end = term; /* restore the string terminator */
6516 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6517 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6518 /* FIXME: if the user adds a newline in the replacement, the
6519 * index will not be recalculated for now, and the new line
6520 * will not be counted as a new header.
6521 */
6522
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6523 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6524 cur_end += delta;
Willy Tarreau62f791e2012-03-09 11:32:30 +0100[diff] [blame]6525 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]6526 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6527 cur_ptr, cur_end + 1,
6528 NULL, NULL);
6529 if (unlikely(!cur_end))
6530 return -1;
6531
6532 /* we have a full respnse and we know that we have either a CR
6533 * or an LF at <ptr>.
6534 */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]6535 txn->status = strl2ui(rtr->p + txn->rsp.sol + txn->rsp.sl.st.c, txn->rsp.sl.st.c_l);
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]6536 hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.st.l, *cur_end == '\r');
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6537 /* there is no point trying this regex on headers */
6538 return 1;
6539 }
6540 }
6541 *cur_end = term; /* restore the string terminator */
6542 return done;
6543}
6544
6545
6546
6547/*
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6548 * Apply all the resp filters of proxy <px> to all headers in buffer <rtr> of session <s>.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6549 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
6550 * unparsable response.
6551 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6552int apply_filters_to_response(struct session *s, struct buffer *rtr, struct proxy *px)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6553{
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6554 struct http_txn *txn = &s->txn;
6555 struct hdr_exp *exp;
6556
6557 for (exp = px->rsp_exp; exp; exp = exp->next) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6558 int ret;
6559
6560 /*
6561 * The interleaving of transformations and verdicts
6562 * makes it difficult to decide to continue or stop
6563 * the evaluation.
6564 */
6565
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6566 if (txn->flags & TX_SVDENY)
6567 break;
6568
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6569 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6570 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
6571 exp->action == ACT_PASS)) {
6572 exp = exp->next;
6573 continue;
6574 }
6575
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6576 /* if this filter had a condition, evaluate it now and skip to
6577 * next filter if the condition does not match.
6578 */
6579 if (exp->cond) {
6580 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_RTR);
6581 ret = acl_pass(ret);
6582 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
6583 ret = !ret;
6584 if (!ret)
6585 continue;
6586 }
6587
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6588 /* Apply the filter to the status line. */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6589 ret = apply_filter_to_sts_line(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6590 if (unlikely(ret < 0))
6591 return -1;
6592
6593 if (likely(ret == 0)) {
6594 /* The filter did not match the response, it can be
6595 * iterated through all headers.
6596 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6597 apply_filter_to_resp_headers(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6598 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6599 }
6600 return 0;
6601}
6602
6603
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6604/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6605 * Manage server-side cookies. It can impact performance by about 2% so it is
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6606 * desirable to call it only when needed. This function is also used when we
6607 * just need to know if there is a cookie (eg: for check-cache).
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6608 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6609void manage_server_side_cookies(struct session *t, struct buffer *res)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6610{
6611 struct http_txn *txn = &t->txn;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6612 struct server *srv;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6613 int is_cookie2;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6614 int cur_idx, old_idx, delta;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6615 char *hdr_beg, *hdr_end, *hdr_next;
6616 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6617
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6618 /* Iterate through the headers.
6619 * we start with the start line.
6620 */
6621 old_idx = 0;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]6622 hdr_next = res->p + txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6623
6624 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
6625 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6626 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6627
6628 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6629 hdr_beg = hdr_next;
6630 hdr_end = hdr_beg + cur_hdr->len;
6631 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6632
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6633 /* We have one full header between hdr_beg and hdr_end, and the
6634 * next header starts at hdr_next. We're only interested in
6635 * "Set-Cookie" and "Set-Cookie2" headers.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6636 */
6637
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6638 is_cookie2 = 0;
6639 prev = hdr_beg + 10;
6640 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie", 10);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6641 if (!val) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6642 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie2", 11);
6643 if (!val) {
6644 old_idx = cur_idx;
6645 continue;
6646 }
6647 is_cookie2 = 1;
6648 prev = hdr_beg + 11;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6649 }
6650
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6651 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
6652 * <prev> points to the colon.
6653 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6654 txn->flags |= TX_SCK_PRESENT;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6655
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6656 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
6657 * check-cache is enabled) and we are not interested in checking
6658 * them. Warning, the cookie capture is declared in the frontend.
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6659 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6660 if (t->be->cookie_name == NULL &&
6661 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6662 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6663 return;
6664
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6665 /* OK so now we know we have to process this response cookie.
6666 * The format of the Set-Cookie header is slightly different
6667 * from the format of the Cookie header in that it does not
6668 * support the comma as a cookie delimiter (thus the header
6669 * cannot be folded) because the Expires attribute described in
6670 * the original Netscape's spec may contain an unquoted date
6671 * with a comma inside. We have to live with this because
6672 * many browsers don't support Max-Age and some browsers don't
6673 * support quoted strings. However the Set-Cookie2 header is
6674 * clean.
6675 *
6676 * We have to keep multiple pointers in order to support cookie
6677 * removal at the beginning, middle or end of header without
6678 * corrupting the header (in case of set-cookie2). A special
6679 * pointer, <scav> points to the beginning of the set-cookie-av
6680 * fields after the first semi-colon. The <next> pointer points
6681 * either to the end of line (set-cookie) or next unquoted comma
6682 * (set-cookie2). All of these headers are valid :
6683 *
6684 * Set-Cookie: NAME1 = VALUE 1 ; Secure; Path="/"\r\n
6685 * Set-Cookie:NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6686 * Set-Cookie: NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6687 * Set-Cookie2: NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard\r\n
6688 * | | | | | | | | | |
6689 * | | | | | | | | +-> next hdr_end <--+
6690 * | | | | | | | +------------> scav
6691 * | | | | | | +--------------> val_end
6692 * | | | | | +--------------------> val_beg
6693 * | | | | +----------------------> equal
6694 * | | | +------------------------> att_end
6695 * | | +----------------------------> att_beg
6696 * | +------------------------------> prev
6697 * +-----------------------------------------> hdr_beg
6698 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6699
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6700 for (; prev < hdr_end; prev = next) {
6701 /* Iterate through all cookies on this line */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6702
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6703 /* find att_beg */
6704 att_beg = prev + 1;
6705 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6706 att_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6707
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6708 /* find att_end : this is the first character after the last non
6709 * space before the equal. It may be equal to hdr_end.
6710 */
6711 equal = att_end = att_beg;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6712
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6713 while (equal < hdr_end) {
6714 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
6715 break;
6716 if (http_is_spht[(unsigned char)*equal++])
6717 continue;
6718 att_end = equal;
6719 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6720
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6721 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6722 * is between <att_beg> and <equal>, both may be identical.
6723 */
6724
6725 /* look for end of cookie if there is an equal sign */
6726 if (equal < hdr_end && *equal == '=') {
6727 /* look for the beginning of the value */
6728 val_beg = equal + 1;
6729 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6730 val_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6731
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6732 /* find the end of the value, respecting quotes */
6733 next = find_cookie_value_end(val_beg, hdr_end);
6734
6735 /* make val_end point to the first white space or delimitor after the value */
6736 val_end = next;
6737 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6738 val_end--;
6739 } else {
6740 /* <equal> points to next comma, semi-colon or EOL */
6741 val_beg = val_end = next = equal;
6742 }
6743
6744 if (next < hdr_end) {
6745 /* Set-Cookie2 supports multiple cookies, and <next> points to
6746 * a colon or semi-colon before the end. So skip all attr-value
6747 * pairs and look for the next comma. For Set-Cookie, since
6748 * commas are permitted in values, skip to the end.
6749 */
6750 if (is_cookie2)
6751 next = find_hdr_value_end(next, hdr_end);
6752 else
6753 next = hdr_end;
6754 }
6755
6756 /* Now everything is as on the diagram above */
6757
6758 /* Ignore cookies with no equal sign */
6759 if (equal == val_end)
6760 continue;
6761
6762 /* If there are spaces around the equal sign, we need to
6763 * strip them otherwise we'll get trouble for cookie captures,
6764 * or even for rewrites. Since this happens extremely rarely,
6765 * it does not hurt performance.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6766 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6767 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6768 int stripped_before = 0;
6769 int stripped_after = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6770
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6771 if (att_end != equal) {
6772 stripped_before = buffer_replace2(res, att_end, equal, NULL, 0);
6773 equal += stripped_before;
6774 val_beg += stripped_before;
6775 }
6776
6777 if (val_beg > equal + 1) {
6778 stripped_after = buffer_replace2(res, equal + 1, val_beg, NULL, 0);
6779 val_beg += stripped_after;
6780 stripped_before += stripped_after;
6781 }
6782
6783 val_end += stripped_before;
6784 next += stripped_before;
6785 hdr_end += stripped_before;
6786 hdr_next += stripped_before;
6787 cur_hdr->len += stripped_before;
Willy Tarreau1fc1f452011-04-07 22:35:37 +0200[diff] [blame]6788 http_msg_move_end(&txn->rsp, stripped_before);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6789 }
6790
6791 /* First, let's see if we want to capture this cookie. We check
6792 * that we don't already have a server side cookie, because we
6793 * can only capture one. Also as an optimisation, we ignore
6794 * cookies shorter than the declared name.
6795 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6796 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6797 txn->srv_cookie == NULL &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6798 (val_end - att_beg >= t->fe->capture_namelen) &&
6799 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6800 int log_len = val_end - att_beg;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]6801 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6802 Alert("HTTP logging : out of memory.\n");
6803 }
Willy Tarreauf70fc752010-11-19 11:27:18 +0100[diff] [blame]6804 else {
6805 if (log_len > t->fe->capture_len)
6806 log_len = t->fe->capture_len;
6807 memcpy(txn->srv_cookie, att_beg, log_len);
6808 txn->srv_cookie[log_len] = 0;
6809 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6810 }
6811
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6812 srv = target_srv(&t->target);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6813 /* now check if we need to process it for persistence */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6814 if (!(t->flags & SN_IGNORE_PRST) &&
6815 (att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6816 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6817 /* assume passive cookie by default */
6818 txn->flags &= ~TX_SCK_MASK;
6819 txn->flags |= TX_SCK_FOUND;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6820
6821 /* If the cookie is in insert mode on a known server, we'll delete
6822 * this occurrence because we'll insert another one later.
6823 * We'll delete it too if the "indirect" option is set and we're in
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6824 * a direct access.
6825 */
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]6826 if (t->be->options2 & PR_O2_COOK_PSV) {
6827 /* The "preserve" flag was set, we don't want to touch the
6828 * server's cookie.
6829 */
6830 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6831 else if ((srv && (t->be->options & PR_O_COOK_INS)) ||
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6832 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6833 /* this cookie must be deleted */
6834 if (*prev == ':' && next == hdr_end) {
6835 /* whole header */
6836 delta = buffer_replace2(res, hdr_beg, hdr_next, NULL, 0);
6837 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6838 txn->hdr_idx.used--;
6839 cur_hdr->len = 0;
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]6840 cur_idx = old_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6841 hdr_next += delta;
6842 http_msg_move_end(&txn->rsp, delta);
6843 /* note: while both invalid now, <next> and <hdr_end>
6844 * are still equal, so the for() will stop as expected.
6845 */
6846 } else {
6847 /* just remove the value */
6848 int delta = del_hdr_value(res, &prev, next);
6849 next = prev;
6850 hdr_end += delta;
6851 hdr_next += delta;
6852 cur_hdr->len += delta;
6853 http_msg_move_end(&txn->rsp, delta);
6854 }
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6855 txn->flags &= ~TX_SCK_MASK;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6856 txn->flags |= TX_SCK_DELETED;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6857 /* and go on with next cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6858 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6859 else if (srv && srv->cookie && (t->be->options & PR_O_COOK_RW)) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6860 /* replace bytes val_beg->val_end with the cookie name associated
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6861 * with this server since we know it.
6862 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6863 delta = buffer_replace2(res, val_beg, val_end, srv->cookie, srv->cklen);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6864 next += delta;
6865 hdr_end += delta;
6866 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6867 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6868 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6869
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6870 txn->flags &= ~TX_SCK_MASK;
6871 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6872 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6873 else if (srv && srv && (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6874 /* insert the cookie name associated with this server
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6875 * before existing cookie, and insert a delimiter between them..
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6876 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6877 delta = buffer_replace2(res, val_beg, val_beg, srv->cookie, srv->cklen + 1);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6878 next += delta;
6879 hdr_end += delta;
6880 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6881 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6882 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6883
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6884 val_beg[srv->cklen] = COOKIE_DELIM;
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6885 txn->flags &= ~TX_SCK_MASK;
6886 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6887 }
6888 }
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]6889 /* next, let's see if the cookie is our appcookie, unless persistence must be ignored */
6890 else if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6891 int cmp_len, value_len;
6892 char *value_begin;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6893
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6894 if (t->be->options2 & PR_O2_AS_PFX) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6895 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6896 value_begin = att_beg + t->be->appsession_name_len;
6897 value_len = MIN(t->be->appsession_len, val_end - att_beg - t->be->appsession_name_len);
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6898 } else {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6899 cmp_len = att_end - att_beg;
6900 value_begin = val_beg;
6901 value_len = MIN(t->be->appsession_len, val_end - val_beg);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6902 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6903
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]6904 if ((cmp_len == t->be->appsession_name_len) &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6905 (memcmp(att_beg, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
6906 /* free a possibly previously allocated memory */
6907 pool_free2(apools.sessid, txn->sessid);
6908
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6909 /* Store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6910 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6911 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6912 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
6913 return;
6914 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6915 memcpy(txn->sessid, value_begin, value_len);
6916 txn->sessid[value_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6917 }
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6918 }
6919 /* that's done for this cookie, check the next one on the same
6920 * line when next != hdr_end (only if is_cookie2).
6921 */
6922 }
6923 /* check next header */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6924 old_idx = cur_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6925 }
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6926
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6927 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6928 appsess *asession = NULL;
6929 /* only do insert, if lookup fails */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6930 asession = appsession_hash_lookup(&(t->be->htbl_proxy), txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6931 if (asession == NULL) {
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]6932 size_t server_id_len;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6933 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
6934 Alert("Not enough Memory process_srv():asession:calloc().\n");
6935 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
6936 return;
6937 }
Willy Tarreau77eb9b82010-11-19 11:29:06 +0100[diff] [blame]6938 asession->serverid = NULL; /* to avoid a double free in case of allocation error */
6939
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6940 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
6941 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6942 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
Cyril Bonté41689c22010-01-10 00:30:14 +0100[diff] [blame]6943 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6944 return;
6945 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6946 memcpy(asession->sessid, txn->sessid, t->be->appsession_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6947 asession->sessid[t->be->appsession_len] = 0;
6948
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6949 server_id_len = strlen(target_srv(&t->target)->id) + 1;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6950 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
Willy Tarreau77eb9b82010-11-19 11:29:06 +0100[diff] [blame]6951 Alert("Not enough Memory process_srv():asession->serverid:malloc().\n");
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6952 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
Cyril Bonté41689c22010-01-10 00:30:14 +0100[diff] [blame]6953 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6954 return;
6955 }
6956 asession->serverid[0] = '\0';
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6957 memcpy(asession->serverid, target_srv(&t->target)->id, server_id_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6958
6959 asession->request_count = 0;
6960 appsession_hash_insert(&(t->be->htbl_proxy), asession);
6961 }
6962
6963 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
6964 asession->request_count++;
6965 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6966}
6967
6968
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6969/*
6970 * Check if response is cacheable or not. Updates t->flags.
6971 */
6972void check_response_for_cacheability(struct session *t, struct buffer *rtr)
6973{
6974 struct http_txn *txn = &t->txn;
6975 char *p1, *p2;
6976
6977 char *cur_ptr, *cur_end, *cur_next;
6978 int cur_idx;
6979
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]6980 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6981 return;
6982
6983 /* Iterate through the headers.
6984 * we start with the start line.
6985 */
6986 cur_idx = 0;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]6987 cur_next = rtr->p + txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6988
6989 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
6990 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6991 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6992
6993 cur_hdr = &txn->hdr_idx.v[cur_idx];
6994 cur_ptr = cur_next;
6995 cur_end = cur_ptr + cur_hdr->len;
6996 cur_next = cur_end + cur_hdr->cr + 1;
6997
6998 /* We have one full header between cur_ptr and cur_end, and the
6999 * next header starts at cur_next. We're only interested in
7000 * "Cookie:" headers.
7001 */
7002
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7003 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
7004 if (val) {
7005 if ((cur_end - (cur_ptr + val) >= 8) &&
7006 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
7007 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
7008 return;
7009 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7010 }
7011
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7012 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
7013 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7014 continue;
7015
7016 /* OK, right now we know we have a cache-control header at cur_ptr */
7017
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7018 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7019
7020 if (p1 >= cur_end) /* no more info */
7021 continue;
7022
7023 /* p1 is at the beginning of the value */
7024 p2 = p1;
7025
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]7026 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7027 p2++;
7028
7029 /* we have a complete value between p1 and p2 */
7030 if (p2 < cur_end && *p2 == '=') {
7031 /* we have something of the form no-cache="set-cookie" */
7032 if ((cur_end - p1 >= 21) &&
7033 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
7034 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7035 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7036 continue;
7037 }
7038
7039 /* OK, so we know that either p2 points to the end of string or to a comma */
7040 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
7041 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
7042 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
7043 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7044 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7045 return;
7046 }
7047
7048 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7049 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7050 continue;
7051 }
7052 }
7053}
7054
7055
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7056/*
7057 * Try to retrieve a known appsession in the URI, then the associated server.
7058 * If the server is found, it's assigned to the session.
7059 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7060void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7061{
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7062 char *end_params, *first_param, *cur_param, *next_param;
7063 char separator;
7064 int value_len;
7065
7066 int mode = t->be->options2 & PR_O2_AS_M_ANY;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7067
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]7068 if (t->be->appsession_name == NULL ||
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]7069 (t->txn.meth != HTTP_METH_GET && t->txn.meth != HTTP_METH_POST && t->txn.meth != HTTP_METH_HEAD)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7070 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7071 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7072
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7073 first_param = NULL;
7074 switch (mode) {
7075 case PR_O2_AS_M_PP:
7076 first_param = memchr(begin, ';', len);
7077 break;
7078 case PR_O2_AS_M_QS:
7079 first_param = memchr(begin, '?', len);
7080 break;
7081 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7082
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7083 if (first_param == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7084 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7085 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7086
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7087 switch (mode) {
7088 case PR_O2_AS_M_PP:
7089 if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) {
7090 end_params = (char *) begin + len;
7091 }
7092 separator = ';';
7093 break;
7094 case PR_O2_AS_M_QS:
7095 end_params = (char *) begin + len;
7096 separator = '&';
7097 break;
7098 default:
7099 /* unknown mode, shouldn't happen */
7100 return;
7101 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7102
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7103 cur_param = next_param = end_params;
7104 while (cur_param > first_param) {
7105 cur_param--;
7106 if ((cur_param[0] == separator) || (cur_param == first_param)) {
7107 /* let's see if this is the appsession parameter */
7108 if ((cur_param + t->be->appsession_name_len + 1 < next_param) &&
7109 ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') &&
7110 (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
7111 /* Cool... it's the right one */
7112 cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2);
7113 value_len = MIN(t->be->appsession_len, next_param - cur_param);
7114 if (value_len > 0) {
7115 manage_client_side_appsession(t, cur_param, value_len);
7116 }
7117 break;
7118 }
7119 next_param = cur_param;
7120 }
7121 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7122#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]7123 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]7124 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7125#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7126}
7127
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7128/*
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7129 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7130 * for the current backend.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7131 *
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7132 * It is assumed that the request is either a HEAD, GET, or POST and that the
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7133 * uri_auth field is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7134 *
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7135 * Returns 1 if stats should be provided, otherwise 0.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7136 */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7137int stats_check_uri(struct stream_interface *si, struct http_txn *txn, struct proxy *backend)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7138{
7139 struct uri_auth *uri_auth = backend->uri_auth;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7140 struct http_msg *msg = &txn->req;
7141 const char *uri = msg->buf->p + msg->sol + msg->sl.rq.u;
7142 const char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7143
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7144 if (!uri_auth)
7145 return 0;
7146
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7147 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7148 return 0;
7149
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7150 memset(&si->applet.ctx.stats, 0, sizeof(si->applet.ctx.stats));
Cyril Bonté19979e12012-04-04 12:57:21 +0200[diff] [blame]7151 si->applet.ctx.stats.st_code = STAT_STATUS_INIT;
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7152
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7153 /* check URI size */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7154 if (uri_auth->uri_len > msg->sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7155 return 0;
7156
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7157 h = uri;
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]7158 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7159 return 0;
7160
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7161 h += uri_auth->uri_len;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7162 while (h <= uri + msg->sl.rq.u_l - 3) {
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7163 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7164 si->applet.ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7165 break;
7166 }
7167 h++;
7168 }
7169
7170 if (uri_auth->refresh) {
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7171 h = uri + uri_auth->uri_len;
7172 while (h <= uri + msg->sl.rq.u_l - 10) {
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7173 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7174 si->applet.ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7175 break;
7176 }
7177 h++;
7178 }
7179 }
7180
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7181 h = uri + uri_auth->uri_len;
7182 while (h <= uri + msg->sl.rq.u_l - 4) {
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]7183 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7184 si->applet.ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]7185 break;
7186 }
7187 h++;
7188 }
7189
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7190 h = uri + uri_auth->uri_len;
7191 while (h <= uri + msg->sl.rq.u_l - 8) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7192 if (memcmp(h, ";st=", 4) == 0) {
Cyril Bonté19979e12012-04-04 12:57:21 +0200[diff] [blame]7193 int i;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7194 h += 4;
Cyril Bonté19979e12012-04-04 12:57:21 +0200[diff] [blame]7195 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
7196 if (strncmp(stat_status_codes[i], h, 4) == 0) {
7197 si->applet.ctx.stats.st_code = i;
7198 break;
7199 }
7200 }
7201 si->applet.ctx.stats.st_code = STAT_STATUS_UNKN;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7202 break;
7203 }
7204 h++;
7205 }
7206
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7207 si->applet.ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7208
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7209 return 1;
7210}
7211
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7212/*
7213 * Capture a bad request or response and archive it in the proxy's structure.
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7214 * WARNING: it's unlikely that we've reached HTTP_MSG_BODY here so we must not
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]7215 * assume that msg->sol = msg->buf->p + msg->som. Also, while HTTP requests
7216 * or response messages cannot wrap, this function may also be used with chunks
7217 * which may wrap.
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7218 */
7219void http_capture_bad_message(struct error_snapshot *es, struct session *s,
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]7220 struct http_msg *msg,
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]7221 int state, struct proxy *other_end)
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7222{
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100[diff] [blame]7223 struct buffer *buf = msg->buf;
7224
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]7225 if (bi_end(buf) <= (buf->p + msg->som)) { /* message wraps */
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]7226 int len1 = buf->size - msg->som - (buf->p - buf->data);
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]7227 es->len = bi_end(buf) - (buf->p + msg->som) + buf->size;
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]7228 memcpy(es->buf, buf->p + msg->som, MIN(len1, sizeof(es->buf)));
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7229 if (es->len > len1 && len1 < sizeof(es->buf))
7230 memcpy(es->buf, buf->data, MIN(es->len, sizeof(es->buf)) - len1);
7231 }
7232 else {
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]7233 es->len = bi_end(buf) - (buf->p + msg->som);
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]7234 memcpy(es->buf, buf->p + msg->som, MIN(es->len, sizeof(es->buf)));
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7235 }
7236
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7237 if (msg->err_pos >= 0)
Willy Tarreauea1175a2012-03-05 15:52:30 +0100[diff] [blame]7238 es->pos = msg->err_pos - msg->som - (buf->p - buf->data);
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]7239 else if (b_ptr(buf, msg->next) >= (buf->p + msg->som))
7240 es->pos = b_ptr(buf, msg->next) - (buf->p + msg->som);
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7241 else
Willy Tarreaucc5cfcb2012-05-04 21:35:27 +0200[diff] [blame]7242 es->pos = b_ptr(buf, msg->next) - (buf->p + msg->som) + buf->size;
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7243
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7244 es->when = date; // user-visible date
7245 es->sid = s->uniq_id;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7246 es->srv = target_srv(&s->target);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7247 es->oe = other_end;
Willy Tarreau6471afb2011-09-23 10:54:59 +0200[diff] [blame]7248 es->src = s->req->prod->addr.from;
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]7249 es->state = state;
7250 es->flags = buf->flags;
Willy Tarreau10479e42010-12-12 14:00:34 +0100[diff] [blame]7251 es->ev_id = error_snapshot_id++;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7252}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7253
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7254/* Return in <vptr> and <vlen> the pointer and length of occurrence <occ> of
7255 * header whose name is <hname> of length <hlen>. If <ctx> is null, lookup is
7256 * performed over the whole headers. Otherwise it must contain a valid header
7257 * context, initialised with ctx->idx=0 for the first lookup in a series. If
7258 * <occ> is positive or null, occurrence #occ from the beginning (or last ctx)
7259 * is returned. Occ #0 and #1 are equivalent. If <occ> is negative (and no less
7260 * than -MAX_HDR_HISTORY), the occurrence is counted from the last one which is
7261 * -1.
7262 * The return value is 0 if nothing was found, or non-zero otherwise.
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7263 */
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7264unsigned int http_get_hdr(struct http_msg *msg, const char *hname, int hlen,
7265 struct hdr_idx *idx, int occ,
7266 struct hdr_ctx *ctx, char **vptr, int *vlen)
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7267{
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7268 struct hdr_ctx local_ctx;
7269 char *ptr_hist[MAX_HDR_HISTORY];
7270 int len_hist[MAX_HDR_HISTORY];
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7271 unsigned int hist_ptr;
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7272 int found;
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7273
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7274 if (!ctx) {
7275 local_ctx.idx = 0;
7276 ctx = &local_ctx;
7277 }
7278
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7279 if (occ >= 0) {
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7280 /* search from the beginning */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7281 while (http_find_header2(hname, hlen, msg->buf->p + msg->sol, idx, ctx)) {
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7282 occ--;
7283 if (occ <= 0) {
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7284 *vptr = ctx->line + ctx->val;
7285 *vlen = ctx->vlen;
7286 return 1;
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7287 }
7288 }
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7289 return 0;
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7290 }
7291
7292 /* negative occurrence, we scan all the list then walk back */
7293 if (-occ > MAX_HDR_HISTORY)
7294 return 0;
7295
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7296 found = hist_ptr = 0;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7297 while (http_find_header2(hname, hlen, msg->buf->p + msg->sol, idx, ctx)) {
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7298 ptr_hist[hist_ptr] = ctx->line + ctx->val;
7299 len_hist[hist_ptr] = ctx->vlen;
7300 if (++hist_ptr >= MAX_HDR_HISTORY)
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7301 hist_ptr = 0;
7302 found++;
7303 }
7304 if (-occ > found)
7305 return 0;
7306 /* OK now we have the last occurrence in [hist_ptr-1], and we need to
7307 * find occurrence -occ, so we have to check [hist_ptr+occ].
7308 */
7309 hist_ptr += occ;
7310 if (hist_ptr >= MAX_HDR_HISTORY)
7311 hist_ptr -= MAX_HDR_HISTORY;
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]7312 *vptr = ptr_hist[hist_ptr];
7313 *vlen = len_hist[hist_ptr];
7314 return 1;
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7315}
7316
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]7317/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7318 * Print a debug line with a header
7319 */
7320void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
7321{
7322 int len, max;
7323 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]7324 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7325 max = end - start;
7326 UBOUND(max, sizeof(trash) - len - 1);
7327 len += strlcpy2(trash + len, start, max + 1);
7328 trash[len++] = '\n';
Willy Tarreau21337822012-04-29 14:11:38 +0200[diff] [blame]7329 if (write(1, trash, len) < 0) /* shut gcc warning */;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7330}
7331
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7332/*
7333 * Initialize a new HTTP transaction for session <s>. It is assumed that all
7334 * the required fields are properly allocated and that we only need to (re)init
7335 * them. This should be used before processing any new request.
7336 */
7337void http_init_txn(struct session *s)
7338{
7339 struct http_txn *txn = &s->txn;
7340 struct proxy *fe = s->fe;
7341
7342 txn->flags = 0;
7343 txn->status = -1;
7344
William Lallemand5f232402012-04-05 18:02:55 +0200[diff] [blame]7345 global.req_count++;
7346
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]7347 txn->cookie_first_date = 0;
7348 txn->cookie_last_date = 0;
7349
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]7350 txn->req.flags = 0;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7351 txn->req.sol = txn->req.eol = txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]7352 txn->req.next = 0;
Willy Tarreaua36fc4d2012-02-17 17:39:37 +0100[diff] [blame]7353 txn->rsp.flags = 0;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7354 txn->rsp.sol = txn->rsp.eol = txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */
Willy Tarreaua458b672012-03-05 11:17:50 +0100[diff] [blame]7355 txn->rsp.next = 0;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]7356 txn->req.chunk_len = 0LL;
7357 txn->req.body_len = 0LL;
7358 txn->rsp.chunk_len = 0LL;
7359 txn->rsp.body_len = 0LL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7360 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
7361 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
Willy Tarreau62f791e2012-03-09 11:32:30 +0100[diff] [blame]7362 txn->req.buf = s->req;
7363 txn->rsp.buf = s->rep;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7364
7365 txn->auth.method = HTTP_AUTH_UNKNOWN;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7366
7367 txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
7368 if (fe->options2 & PR_O2_REQBUG_OK)
7369 txn->req.err_pos = -1; /* let buggy requests pass */
7370
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7371 if (txn->req.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7372 memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *));
7373
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7374 if (txn->rsp.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7375 memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *));
7376
7377 if (txn->hdr_idx.v)
7378 hdr_idx_init(&txn->hdr_idx);
7379}
7380
7381/* to be used at the end of a transaction */
7382void http_end_txn(struct session *s)
7383{
7384 struct http_txn *txn = &s->txn;
7385
7386 /* these ones will have been dynamically allocated */
7387 pool_free2(pool2_requri, txn->uri);
7388 pool_free2(pool2_capture, txn->cli_cookie);
7389 pool_free2(pool2_capture, txn->srv_cookie);
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7390 pool_free2(apools.sessid, txn->sessid);
William Lallemanda73203e2012-03-12 12:48:57 +0100[diff] [blame]7391 pool_free2(pool2_uniqueid, s->unique_id);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7392
William Lallemanda73203e2012-03-12 12:48:57 +0100[diff] [blame]7393 s->unique_id = NULL;
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7394 txn->sessid = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7395 txn->uri = NULL;
7396 txn->srv_cookie = NULL;
7397 txn->cli_cookie = NULL;
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7398
7399 if (txn->req.cap) {
7400 struct cap_hdr *h;
7401 for (h = s->fe->req_cap; h; h = h->next)
7402 pool_free2(h->pool, txn->req.cap[h->index]);
7403 memset(txn->req.cap, 0, s->fe->nb_req_cap * sizeof(void *));
7404 }
7405
7406 if (txn->rsp.cap) {
7407 struct cap_hdr *h;
7408 for (h = s->fe->rsp_cap; h; h = h->next)
7409 pool_free2(h->pool, txn->rsp.cap[h->index]);
7410 memset(txn->rsp.cap, 0, s->fe->nb_rsp_cap * sizeof(void *));
7411 }
7412
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7413}
7414
7415/* to be used at the end of a transaction to prepare a new one */
7416void http_reset_txn(struct session *s)
7417{
7418 http_end_txn(s);
7419 http_init_txn(s);
7420
7421 s->be = s->fe;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7422 s->logs.logwait = s->fe->to_log;
Simon Hormanaf514952011-06-21 14:34:57 +0900[diff] [blame]7423 session_del_srv_conn(s);
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]7424 clear_target(&s->target);
Emeric Brunb982a3d2010-01-04 15:45:53 +0100[diff] [blame]7425 /* re-init store persistence */
7426 s->store_count = 0;
7427
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7428 s->pend_pos = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7429
7430 s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
7431
Willy Tarreau739cfba2010-01-25 23:11:14 +0100[diff] [blame]7432 /* We must trim any excess data from the response buffer, because we
7433 * may have blocked an invalid response from a server that we don't
7434 * want to accidentely forward once we disable the analysers, nor do
7435 * we want those data to come along with next response. A typical
7436 * example of such data would be from a buggy server responding to
7437 * a HEAD with some data, or sending more than the advertised
7438 * content-length.
7439 */
Willy Tarreau363a5bb2012-03-02 20:14:45 +0100[diff] [blame]7440 if (unlikely(s->rep->i))
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100[diff] [blame]7441 s->rep->i = 0;
Willy Tarreau739cfba2010-01-25 23:11:14 +0100[diff] [blame]7442
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7443 s->req->rto = s->fe->timeout.client;
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7444 s->req->wto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7445
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7446 s->rep->rto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7447 s->rep->wto = s->fe->timeout.client;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7448
7449 s->req->rex = TICK_ETERNITY;
7450 s->req->wex = TICK_ETERNITY;
7451 s->req->analyse_exp = TICK_ETERNITY;
7452 s->rep->rex = TICK_ETERNITY;
7453 s->rep->wex = TICK_ETERNITY;
7454 s->rep->analyse_exp = TICK_ETERNITY;
7455}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7456
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]7457void free_http_req_rules(struct list *r) {
7458 struct http_req_rule *tr, *pr;
7459
7460 list_for_each_entry_safe(pr, tr, r, list) {
7461 LIST_DEL(&pr->list);
7462 if (pr->action == HTTP_REQ_ACT_HTTP_AUTH)
7463 free(pr->http_auth.realm);
7464
7465 free(pr);
7466 }
7467}
7468
7469struct http_req_rule *parse_http_req_cond(const char **args, const char *file, int linenum, struct proxy *proxy)
7470{
7471 struct http_req_rule *rule;
7472 int cur_arg;
7473
7474 rule = (struct http_req_rule*)calloc(1, sizeof(struct http_req_rule));
7475 if (!rule) {
7476 Alert("parsing [%s:%d]: out of memory.\n", file, linenum);
7477 return NULL;
7478 }
7479
7480 if (!*args[0]) {
7481 goto req_error_parsing;
7482 } else if (!strcmp(args[0], "allow")) {
7483 rule->action = HTTP_REQ_ACT_ALLOW;
7484 cur_arg = 1;
7485 } else if (!strcmp(args[0], "deny")) {
7486 rule->action = HTTP_REQ_ACT_DENY;
7487 cur_arg = 1;
7488 } else if (!strcmp(args[0], "auth")) {
7489 rule->action = HTTP_REQ_ACT_HTTP_AUTH;
7490 cur_arg = 1;
7491
7492 while(*args[cur_arg]) {
7493 if (!strcmp(args[cur_arg], "realm")) {
7494 rule->http_auth.realm = strdup(args[cur_arg + 1]);
7495 cur_arg+=2;
7496 continue;
7497 } else
7498 break;
7499 }
7500 } else {
7501req_error_parsing:
7502 Alert("parsing [%s:%d]: %s '%s', expects 'allow', 'deny', 'auth'.\n",
7503 file, linenum, *args[1]?"unknown parameter":"missing keyword in", args[*args[1]?1:0]);
7504 return NULL;
7505 }
7506
7507 if (strcmp(args[cur_arg], "if") == 0 || strcmp(args[cur_arg], "unless") == 0) {
7508 struct acl_cond *cond;
7509
7510 if ((cond = build_acl_cond(file, linenum, proxy, args+cur_arg)) == NULL) {
7511 Alert("parsing [%s:%d] : error detected while parsing an 'http-request %s' condition.\n",
7512 file, linenum, args[0]);
7513 return NULL;
7514 }
7515 rule->cond = cond;
7516 }
7517 else if (*args[cur_arg]) {
7518 Alert("parsing [%s:%d]: 'http-request %s' expects 'realm' for 'auth' or"
7519 " either 'if' or 'unless' followed by a condition but found '%s'.\n",
7520 file, linenum, args[0], args[cur_arg]);
7521 return NULL;
7522 }
7523
7524 return rule;
7525}
7526
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7527/************************************************************************/
7528/* The code below is dedicated to ACL parsing and matching */
7529/************************************************************************/
7530
7531
Willy Tarreau14174bc2012-04-16 14:34:04 +0200[diff] [blame]7532/* This function ensures that the prerequisites for an L7 fetch are ready,
7533 * which means that a request or response is ready. If some data is missing,
7534 * a parsing attempt is made. This is useful in TCP-based ACLs which are able
7535 * to extract data from L7.
7536 *
7537 * The function returns :
7538 * 0 if some data is missing or if the requested data cannot be fetched
7539 * -1 if it is certain that we'll never have any HTTP message there
7540 * 1 if an HTTP message is ready
7541 */
7542static int
7543acl_prefetch_http(struct proxy *px, struct session *s, void *l7, int dir,
7544 struct acl_expr *expr, struct acl_test *test)
7545{
7546 struct http_txn *txn = l7;
7547 struct http_msg *msg = &txn->req;
7548
7549 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
7550 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
7551 */
7552
7553 if (unlikely(!s || !txn))
7554 return 0;
7555
7556 /* Check for a dependency on a request */
7557
7558 if (expr->kw->requires & ACL_USE_L7REQ_ANY) {
7559 if (unlikely(!s->req))
7560 return 0;
7561
7562 if (unlikely(txn->req.msg_state < HTTP_MSG_BODY)) {
7563 if ((msg->msg_state == HTTP_MSG_ERROR) || (s->req->flags & BF_FULL)) {
7564 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7565 return -1;
7566 }
7567
7568 /* Try to decode HTTP request */
7569 if (likely(msg->next < s->req->i))
7570 http_msg_analyzer(msg, &txn->hdr_idx);
7571
7572 /* Still no valid request ? */
7573 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
7574 if ((msg->msg_state == HTTP_MSG_ERROR) || (s->req->flags & BF_FULL)) {
7575 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7576 return -1;
7577 }
7578 /* wait for final state */
7579 test->flags |= ACL_TEST_F_MAY_CHANGE;
7580 return 0;
7581 }
7582
7583 /* OK we just got a valid HTTP request. We have some minor
7584 * preparation to perform so that further checks can rely
7585 * on HTTP tests.
7586 */
7587 txn->meth = find_http_meth(msg->buf->p + msg->sol, msg->sl.rq.m_l);
7588 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
7589 s->flags |= SN_REDIRECTABLE;
7590
7591 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(txn)) {
7592 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7593 return -1;
7594 }
7595 }
7596
7597 if ((expr->kw->requires & ACL_USE_L7REQ_VOLATILE) &&
7598 txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7599 return 0; /* data might have moved and indexes changed */
7600
7601 /* otherwise everything's ready for the request */
7602 }
7603
7604 /* Check for a dependency on a response */
7605 if (expr->kw->requires & ACL_USE_L7RTR_ANY) {
7606 if (txn->rsp.msg_state < HTTP_MSG_BODY)
7607 return 0;
7608 }
7609
7610 /* everything's OK */
7611 return 1;
7612}
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7613
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7614#define CHECK_HTTP_MESSAGE_FIRST() \
7615 do { int r = acl_prefetch_http(px, l4, l7, dir, expr, test); if (r <= 0) return r; } while (0)
7616
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7617
7618/* 1. Check on METHOD
7619 * We use the pre-parsed method if it is known, and store its number as an
7620 * integer. If it is unknown, we use the pointer and the length.
7621 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7622static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7623{
7624 int len, meth;
7625
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7626 len = strlen(*text);
7627 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7628
7629 pattern->val.i = meth;
7630 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7631 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7632 if (!pattern->ptr.str)
7633 return 0;
7634 pattern->len = len;
7635 }
7636 return 1;
7637}
7638
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7639/* This function fetches the method of current HTTP request and stores
7640 * it in the global pattern struct as a chunk. There are two possibilities :
7641 * - if the method is known (not HTTP_METH_OTHER), its identifier is stored
7642 * in <len> and <ptr> is NULL ;
7643 * - if the method is unknown (HTTP_METH_OTHER), <ptr> points to the text and
7644 * <len> to its length.
7645 * This is intended to be used with acl_match_meth() only.
7646 */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7647static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7648acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
7649 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7650{
7651 int meth;
7652 struct http_txn *txn = l7;
7653
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7654 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7655
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7656 meth = txn->meth;
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7657 temp_pattern.data.str.len = meth;
7658 temp_pattern.data.str.str = NULL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7659 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7660 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7661 /* ensure the indexes are not affected */
7662 return 0;
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7663 temp_pattern.data.str.len = txn->req.sl.rq.m_l;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7664 temp_pattern.data.str.str = txn->req.buf->p + txn->req.sol;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7665 }
7666 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7667 return 1;
7668}
7669
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7670/* See above how the method is stored in the global pattern */
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7671static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
7672{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7673 int icase;
7674
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7675
7676 if (temp_pattern.data.str.str == NULL) {
7677 /* well-known method */
7678 if (temp_pattern.data.str.len == pattern->val.i)
7679 return ACL_PAT_PASS;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7680 return ACL_PAT_FAIL;
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7681 }
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7682
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7683 /* Uncommon method, only HTTP_METH_OTHER is accepted now */
7684 if (pattern->val.i != HTTP_METH_OTHER)
7685 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7686
7687 /* Other method, we must compare the strings */
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7688 if (pattern->len != temp_pattern.data.str.len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7689 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7690
7691 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
Willy Tarreau8e5e9552011-12-16 15:38:49 +0100[diff] [blame]7692 if ((icase && strncasecmp(pattern->ptr.str, temp_pattern.data.str.str, temp_pattern.data.str.len) != 0) ||
7693 (!icase && strncmp(pattern->ptr.str, temp_pattern.data.str.str, temp_pattern.data.str.len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7694 return ACL_PAT_FAIL;
7695 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7696}
7697
7698/* 2. Check on Request/Status Version
7699 * We simply compare strings here.
7700 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7701static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7702{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7703 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7704 if (!pattern->ptr.str)
7705 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7706 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7707 return 1;
7708}
7709
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7710static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7711acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
7712 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7713{
7714 struct http_txn *txn = l7;
7715 char *ptr;
7716 int len;
7717
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7718 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7719
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7720 len = txn->req.sl.rq.v_l;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7721 ptr = txn->req.buf->p + txn->req.sol + txn->req.sl.rq.v;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7722
7723 while ((len-- > 0) && (*ptr++ != '/'));
7724 if (len <= 0)
7725 return 0;
7726
Willy Tarreau664092c2011-12-16 19:11:42 +0100[diff] [blame]7727 temp_pattern.data.str.str = ptr;
7728 temp_pattern.data.str.len = len;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7729
7730 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7731 return 1;
7732}
7733
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7734static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7735acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
7736 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7737{
7738 struct http_txn *txn = l7;
7739 char *ptr;
7740 int len;
7741
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7742 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7743
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7744 len = txn->rsp.sl.st.v_l;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7745 ptr = txn->rsp.buf->p + txn->rsp.sol;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7746
7747 while ((len-- > 0) && (*ptr++ != '/'));
7748 if (len <= 0)
7749 return 0;
7750
Willy Tarreau664092c2011-12-16 19:11:42 +0100[diff] [blame]7751 temp_pattern.data.str.str = ptr;
7752 temp_pattern.data.str.len = len;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7753
7754 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7755 return 1;
7756}
7757
7758/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7759static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7760acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
7761 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7762{
7763 struct http_txn *txn = l7;
7764 char *ptr;
7765 int len;
7766
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7767 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7768
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7769 len = txn->rsp.sl.st.c_l;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7770 ptr = txn->rsp.buf->p + txn->rsp.sol + txn->rsp.sl.st.c;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7771
Willy Tarreaua5e37562011-12-16 17:06:15 +0100[diff] [blame]7772 temp_pattern.data.integer = __strl2ui(ptr, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7773 test->flags = ACL_TEST_F_VOL_1ST;
7774 return 1;
7775}
7776
7777/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7778static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7779acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
7780 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7781{
7782 struct http_txn *txn = l7;
7783
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7784 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7785
Willy Tarreau664092c2011-12-16 19:11:42 +0100[diff] [blame]7786 temp_pattern.data.str.len = txn->req.sl.rq.u_l;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7787 temp_pattern.data.str.str = txn->req.buf->p + txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7788
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]7789 /* we do not need to set READ_ONLY because the data is in a buffer */
7790 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7791 return 1;
7792}
7793
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7794static int
7795acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7796 struct acl_expr *expr, struct acl_test *test)
7797{
7798 struct http_txn *txn = l7;
7799
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7800 CHECK_HTTP_MESSAGE_FIRST();
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7801
7802 /* Parse HTTP request */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7803 url2sa(txn->req.buf->p + txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->req->cons->addr.to);
Willy Tarreauf4362b32011-12-16 17:49:52 +0100[diff] [blame]7804 if (((struct sockaddr_in *)&l4->req->cons->addr.to)->sin_family != AF_INET)
7805 return 0;
7806 temp_pattern.type = PATTERN_TYPE_IP;
7807 temp_pattern.data.ip = ((struct sockaddr_in *)&l4->req->cons->addr.to)->sin_addr;
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7808
7809 /*
7810 * If we are parsing url in frontend space, we prepare backend stage
7811 * to not parse again the same url ! optimization lazyness...
7812 */
7813 if (px->options & PR_O_HTTP_PROXY)
7814 l4->flags |= SN_ADDR_SET;
7815
Willy Tarreauf4362b32011-12-16 17:49:52 +0100[diff] [blame]7816 test->flags = 0;
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7817 return 1;
7818}
7819
7820static int
7821acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
7822 struct acl_expr *expr, struct acl_test *test)
7823{
7824 struct http_txn *txn = l7;
7825
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7826 CHECK_HTTP_MESSAGE_FIRST();
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7827
7828 /* Same optimization as url_ip */
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7829 url2sa(txn->req.buf->p + txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->req->cons->addr.to);
Willy Tarreaua5e37562011-12-16 17:06:15 +0100[diff] [blame]7830 temp_pattern.data.integer = ntohs(((struct sockaddr_in *)&l4->req->cons->addr.to)->sin_port);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7831
7832 if (px->options & PR_O_HTTP_PROXY)
7833 l4->flags |= SN_ADDR_SET;
7834
7835 test->flags = ACL_TEST_F_READ_ONLY;
7836 return 1;
7837}
7838
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7839/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]7840 * Accepts exactly 1 argument of type string.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7841 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7842static int
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7843acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7844 struct acl_expr *expr, struct acl_test *test)
7845{
7846 struct http_txn *txn = l7;
7847 struct hdr_idx *idx = &txn->hdr_idx;
7848 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7849 const struct http_msg *msg = ((dir & ACL_DIR_MASK) == ACL_DIR_REQ) ? &txn->req : &txn->rsp;
7850
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]7851 if (!expr->args || expr->args->type != ARGT_STR)
7852 return 0;
7853
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7854 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7855
7856 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7857 /* search for header from the beginning */
7858 ctx->idx = 0;
7859
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]7860 if (http_find_header2(expr->args->data.str.str, expr->args->data.str.len, msg->buf->p + msg->sol, idx, ctx)) {
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7861 test->flags |= ACL_TEST_F_FETCH_MORE;
7862 test->flags |= ACL_TEST_F_VOL_HDR;
Willy Tarreau664092c2011-12-16 19:11:42 +0100[diff] [blame]7863 temp_pattern.data.str.str = (char *)ctx->line + ctx->val;
7864 temp_pattern.data.str.len = ctx->vlen;
7865
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7866 return 1;
7867 }
7868
7869 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7870 test->flags |= ACL_TEST_F_VOL_HDR;
7871 return 0;
7872}
7873
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7874/* 6. Check on HTTP header count. The number of occurrences is returned.
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]7875 * Accepts exactly 1 argument of type string.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7876 */
7877static int
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7878acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7879 struct acl_expr *expr, struct acl_test *test)
7880{
7881 struct http_txn *txn = l7;
7882 struct hdr_idx *idx = &txn->hdr_idx;
7883 struct hdr_ctx ctx;
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7884 const struct http_msg *msg = ((dir & ACL_DIR_MASK) == ACL_DIR_REQ) ? &txn->req : &txn->rsp;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7885 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7886
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]7887 if (!expr->args || expr->args->type != ARGT_STR)
7888 return 0;
7889
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7890 CHECK_HTTP_MESSAGE_FIRST();
7891
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7892 ctx.idx = 0;
7893 cnt = 0;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]7894 while (http_find_header2(expr->args->data.str.str, expr->args->data.str.len, msg->buf->p + msg->sol, idx, &ctx))
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7895 cnt++;
7896
Willy Tarreaua5e37562011-12-16 17:06:15 +0100[diff] [blame]7897 temp_pattern.data.integer = cnt;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7898 test->flags = ACL_TEST_F_VOL_HDR;
7899 return 1;
7900}
7901
7902/* 7. Check on HTTP header's integer value. The integer value is returned.
7903 * FIXME: the type is 'int', it may not be appropriate for everything.
7904 */
7905static int
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7906acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7907 struct acl_expr *expr, struct acl_test *test)
7908{
Willy Tarreaud53e2422012-04-16 17:21:11 +0200[diff] [blame]7909 int ret = acl_fetch_hdr(px, l4, l7, dir, expr, test);
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7910
Willy Tarreaud53e2422012-04-16 17:21:11 +0200[diff] [blame]7911 if (ret > 0)
7912 temp_pattern.data.integer = strl2ic(temp_pattern.data.str.str, temp_pattern.data.str.len);
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7913
Willy Tarreaud53e2422012-04-16 17:21:11 +0200[diff] [blame]7914 return ret;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7915}
7916
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7917/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7918 */
7919static int
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7920acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7921 struct acl_expr *expr, struct acl_test *test)
7922{
Willy Tarreaud53e2422012-04-16 17:21:11 +0200[diff] [blame]7923 int ret;
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]7924
Willy Tarreaud53e2422012-04-16 17:21:11 +0200[diff] [blame]7925 while ((ret = acl_fetch_hdr(px, l4, l7, dir, expr, test)) > 0) {
Willy Tarreauf4362b32011-12-16 17:49:52 +0100[diff] [blame]7926 temp_pattern.type = PATTERN_TYPE_IP;
Willy Tarreaud53e2422012-04-16 17:21:11 +0200[diff] [blame]7927 if (url2ipv4((char *)temp_pattern.data.str.str, &temp_pattern.data.ip))
7928 break;
7929 /* if the header doesn't match an IP address, fetch next one */
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7930 }
Willy Tarreaud53e2422012-04-16 17:21:11 +0200[diff] [blame]7931 return ret;
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7932}
7933
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7934/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
7935 * the first '/' after the possible hostname, and ends before the possible '?'.
7936 */
7937static int
7938acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
7939 struct acl_expr *expr, struct acl_test *test)
7940{
7941 struct http_txn *txn = l7;
7942 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7943
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7944 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7945
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]7946 end = txn->req.buf->p + txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]7947 ptr = http_get_path(txn);
7948 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7949 return 0;
7950
7951 /* OK, we got the '/' ! */
Willy Tarreau664092c2011-12-16 19:11:42 +0100[diff] [blame]7952 temp_pattern.data.str.str = ptr;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7953
7954 while (ptr < end && *ptr != '?')
7955 ptr++;
7956
Willy Tarreau664092c2011-12-16 19:11:42 +0100[diff] [blame]7957 temp_pattern.data.str.len = ptr - temp_pattern.data.str.str;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7958
7959 /* we do not need to set READ_ONLY because the data is in a buffer */
7960 test->flags = ACL_TEST_F_VOL_1ST;
7961 return 1;
7962}
7963
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7964static int
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7965acl_fetch_proto_http(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7966 struct acl_expr *expr, struct acl_test *test)
7967{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7968 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
7969 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
7970 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7971
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7972 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7973
7974 test->flags |= ACL_TEST_F_SET_RES_PASS;
7975 return 1;
7976}
7977
Willy Tarreau7f18e522010-10-22 20:04:13 +0200[diff] [blame]7978/* return a valid test if the current request is the first one on the connection */
7979static int
7980acl_fetch_http_first_req(struct proxy *px, struct session *s, void *l7, int dir,
7981 struct acl_expr *expr, struct acl_test *test)
7982{
7983 if (!s)
7984 return 0;
7985
7986 if (s->txn.flags & TX_NOT_FIRST)
7987 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7988 else
7989 test->flags |= ACL_TEST_F_SET_RES_PASS;
7990
7991 return 1;
7992}
7993
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]7994/* Accepts exactly 1 argument of type userlist */
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7995static int
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]7996acl_fetch_http_auth(struct proxy *px, struct session *l4, void *l7, int dir,
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7997 struct acl_expr *expr, struct acl_test *test)
7998{
7999
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8000 if (!expr->args || expr->args->type != ARGT_USR)
8001 return 0;
8002
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]8003 CHECK_HTTP_MESSAGE_FIRST();
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8004
Willy Tarreauc0239e02012-04-16 14:42:55 +0200[diff] [blame]8005 if (!get_http_auth(l4))
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8006 return 0;
8007
Willy Tarreau8f7406e2012-04-20 18:16:26 +0200[diff] [blame]8008 if (check_user(expr->args->data.usr, 0, l4->txn.auth.user, l4->txn.auth.pass))
8009 test->flags |= ACL_TEST_F_SET_RES_PASS;
8010 else
8011 test->flags |= ACL_TEST_F_SET_RES_FAIL;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8012
8013 return 1;
8014}
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8015
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8016/* Try to find the next occurrence of a cookie name in a cookie header value.
8017 * The lookup begins at <hdr>. The pointer and size of the next occurrence of
8018 * the cookie value is returned into *value and *value_l, and the function
8019 * returns a pointer to the next pointer to search from if the value was found.
8020 * Otherwise if the cookie was not found, NULL is returned and neither value
8021 * nor value_l are touched. The input <hdr> string should first point to the
8022 * header's value, and the <hdr_end> pointer must point to the first character
8023 * not part of the value. <list> must be non-zero if value may represent a list
8024 * of values (cookie headers). This makes it faster to abort parsing when no
8025 * list is expected.
8026 */
8027static char *
8028extract_cookie_value(char *hdr, const char *hdr_end,
8029 char *cookie_name, size_t cookie_name_l, int list,
Willy Tarreau3fb818c2012-04-11 17:21:08 +0200[diff] [blame]8030 char **value, int *value_l)
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8031{
8032 char *equal, *att_end, *att_beg, *val_beg, *val_end;
8033 char *next;
8034
8035 /* we search at least a cookie name followed by an equal, and more
8036 * generally something like this :
8037 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
8038 */
8039 for (att_beg = hdr; att_beg + cookie_name_l + 1 < hdr_end; att_beg = next + 1) {
8040 /* Iterate through all cookies on this line */
8041
8042 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
8043 att_beg++;
8044
8045 /* find att_end : this is the first character after the last non
8046 * space before the equal. It may be equal to hdr_end.
8047 */
8048 equal = att_end = att_beg;
8049
8050 while (equal < hdr_end) {
8051 if (*equal == '=' || *equal == ';' || (list && *equal == ','))
8052 break;
8053 if (http_is_spht[(unsigned char)*equal++])
8054 continue;
8055 att_end = equal;
8056 }
8057
8058 /* here, <equal> points to '=', a delimitor or the end. <att_end>
8059 * is between <att_beg> and <equal>, both may be identical.
8060 */
8061
8062 /* look for end of cookie if there is an equal sign */
8063 if (equal < hdr_end && *equal == '=') {
8064 /* look for the beginning of the value */
8065 val_beg = equal + 1;
8066 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
8067 val_beg++;
8068
8069 /* find the end of the value, respecting quotes */
8070 next = find_cookie_value_end(val_beg, hdr_end);
8071
8072 /* make val_end point to the first white space or delimitor after the value */
8073 val_end = next;
8074 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
8075 val_end--;
8076 } else {
8077 val_beg = val_end = next = equal;
8078 }
8079
8080 /* We have nothing to do with attributes beginning with '$'. However,
8081 * they will automatically be removed if a header before them is removed,
8082 * since they're supposed to be linked together.
8083 */
8084 if (*att_beg == '$')
8085 continue;
8086
8087 /* Ignore cookies with no equal sign */
8088 if (equal == next)
8089 continue;
8090
8091 /* Now we have the cookie name between att_beg and att_end, and
8092 * its value between val_beg and val_end.
8093 */
8094
8095 if (att_end - att_beg == cookie_name_l &&
8096 memcmp(att_beg, cookie_name, cookie_name_l) == 0) {
8097 /* let's return this value and indicate where to go on from */
8098 *value = val_beg;
8099 *value_l = val_end - val_beg;
8100 return next + 1;
8101 }
8102
8103 /* Set-Cookie headers only have the name in the first attr=value part */
8104 if (!list)
8105 break;
8106 }
8107
8108 return NULL;
8109}
8110
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8111/* Iterate over all cookies present in a message. The context is stored in
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8112 * test->ctx.a[0] for the in-header position, test->ctx.a[1] for the
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8113 * end-of-header-value, and test->ctx.a[2] for the hdr_idx. Depending on
8114 * the direction, multiple cookies may be parsed on the same line or not.
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8115 * The cookie name is in expr->arg and the name length in expr->args->data.str.len.
8116 * Accepts exactly 1 argument of type string.
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8117 */
8118static int
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8119acl_fetch_cookie_value(struct proxy *px, struct session *l4, void *l7, int dir,
8120 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8121{
8122 struct http_txn *txn = l7;
8123 struct hdr_idx *idx = &txn->hdr_idx;
8124 struct hdr_ctx *ctx = (struct hdr_ctx *)&test->ctx.a[2];
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8125 const struct http_msg *msg;
8126 const char *hdr_name;
8127 int hdr_name_len;
8128 char *sol;
8129
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8130 if (!expr->args || expr->args->type != ARGT_STR)
8131 return 0;
8132
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8133 CHECK_HTTP_MESSAGE_FIRST();
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8134
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8135 if ((dir & ACL_DIR_MASK) == ACL_DIR_REQ) {
8136 msg = &txn->req;
8137 hdr_name = "Cookie";
8138 hdr_name_len = 6;
8139 } else {
8140 msg = &txn->rsp;
8141 hdr_name = "Set-Cookie";
8142 hdr_name_len = 10;
8143 }
8144
8145 sol = msg->buf->p + msg->sol;
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8146 if (!(test->flags & ACL_TEST_F_FETCH_MORE)) {
8147 /* search for the header from the beginning, we must first initialize
8148 * the search parameters.
8149 */
8150 test->ctx.a[0] = NULL;
8151 ctx->idx = 0;
8152 }
8153
8154 while (1) {
8155 /* Note: test->ctx.a[0] == NULL every time we need to fetch a new header */
8156 if (!test->ctx.a[0]) {
8157 if (!http_find_header2(hdr_name, hdr_name_len, sol, idx, ctx))
8158 goto out;
8159
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8160 if (ctx->vlen < expr->args->data.str.len + 1)
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8161 continue;
8162
8163 test->ctx.a[0] = ctx->line + ctx->val;
8164 test->ctx.a[1] = test->ctx.a[0] + ctx->vlen;
8165 }
8166
8167 test->ctx.a[0] = extract_cookie_value(test->ctx.a[0], test->ctx.a[1],
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8168 expr->args->data.str.str, expr->args->data.str.len,
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8169 (dir & ACL_DIR_MASK) == ACL_DIR_REQ,
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8170 &temp_pattern.data.str.str,
8171 &temp_pattern.data.str.len);
8172 if (test->ctx.a[0]) {
8173 /* one value was returned into temp_pattern.data.str.{str,len} */
8174 test->flags |= ACL_TEST_F_FETCH_MORE;
8175 test->flags |= ACL_TEST_F_VOL_HDR;
8176 return 1;
8177 }
8178 }
8179
8180 out:
8181 test->flags &= ~ACL_TEST_F_FETCH_MORE;
8182 test->flags |= ACL_TEST_F_VOL_HDR;
8183 return 0;
8184}
8185
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8186/* Iterate over all cookies present in a request to count how many occurrences
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8187 * match the name in expr->arg and expr->args->data.str.len. If <multi> is non-null, then
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8188 * multiple cookies may be parsed on the same line.
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8189 * Accepts exactly 1 argument of type string.
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8190 */
8191static int
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8192acl_fetch_cookie_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
8193 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8194{
8195 struct http_txn *txn = l7;
8196 struct hdr_idx *idx = &txn->hdr_idx;
8197 struct hdr_ctx ctx;
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8198 const struct http_msg *msg;
8199 const char *hdr_name;
8200 int hdr_name_len;
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8201 int cnt;
8202 char *val_beg, *val_end;
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8203 char *sol;
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8204
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8205 if (!expr->args || expr->args->type != ARGT_STR)
8206 return 0;
8207
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8208 CHECK_HTTP_MESSAGE_FIRST();
8209
8210 if ((dir & ACL_DIR_MASK) == ACL_DIR_REQ) {
8211 msg = &txn->req;
8212 hdr_name = "Cookie";
8213 hdr_name_len = 6;
8214 } else {
8215 msg = &txn->rsp;
8216 hdr_name = "Set-Cookie";
8217 hdr_name_len = 10;
8218 }
8219
8220 sol = msg->buf->p + msg->sol;
Willy Tarreau46787ed2012-04-11 17:28:40 +0200[diff] [blame]8221 val_end = val_beg = NULL;
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8222 ctx.idx = 0;
8223 cnt = 0;
8224
8225 while (1) {
8226 /* Note: val_beg == NULL every time we need to fetch a new header */
8227 if (!val_beg) {
8228 if (!http_find_header2(hdr_name, hdr_name_len, sol, idx, &ctx))
8229 break;
8230
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8231 if (ctx.vlen < expr->args->data.str.len + 1)
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8232 continue;
8233
8234 val_beg = ctx.line + ctx.val;
8235 val_end = val_beg + ctx.vlen;
8236 }
8237
8238 while ((val_beg = extract_cookie_value(val_beg, val_end,
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]8239 expr->args->data.str.str, expr->args->data.str.len,
Willy Tarreaue333ec92012-04-16 16:26:40 +0200[diff] [blame]8240 (dir & ACL_DIR_MASK) == ACL_DIR_REQ,
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8241 &temp_pattern.data.str.str,
8242 &temp_pattern.data.str.len))) {
8243 cnt++;
8244 }
8245 }
8246
8247 temp_pattern.data.integer = cnt;
8248 test->flags |= ACL_TEST_F_VOL_HDR;
8249 return 1;
8250}
8251
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8252/************************************************************************/
8253/* All supported keywords must be declared here. */
8254/************************************************************************/
8255
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8256/* Note: must not be declared <const> as its list will be overwritten.
8257 * Please take care of keeping this list alphabetically sorted.
8258 */
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8259static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8260 { "cook", acl_parse_str, acl_fetch_cookie_value, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP, ARG1(0,STR) },
8261 { "cook_beg", acl_parse_str, acl_fetch_cookie_value, acl_match_beg, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8262 { "cook_cnt", acl_parse_int, acl_fetch_cookie_cnt, acl_match_int, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8263 { "cook_dir", acl_parse_str, acl_fetch_cookie_value, acl_match_dir, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8264 { "cook_dom", acl_parse_str, acl_fetch_cookie_value, acl_match_dom, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8265 { "cook_end", acl_parse_str, acl_fetch_cookie_value, acl_match_end, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8266 { "cook_len", acl_parse_int, acl_fetch_cookie_value, acl_match_len, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8267 { "cook_reg", acl_parse_reg, acl_fetch_cookie_value, acl_match_reg, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8268 { "cook_sub", acl_parse_str, acl_fetch_cookie_value, acl_match_sub, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8269
8270 { "hdr", acl_parse_str, acl_fetch_hdr, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP, ARG1(0,STR) },
8271 { "hdr_beg", acl_parse_str, acl_fetch_hdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8272 { "hdr_cnt", acl_parse_int, acl_fetch_hdr_cnt, acl_match_int, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8273 { "hdr_dir", acl_parse_str, acl_fetch_hdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8274 { "hdr_dom", acl_parse_str, acl_fetch_hdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8275 { "hdr_end", acl_parse_str, acl_fetch_hdr, acl_match_end, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8276 { "hdr_ip", acl_parse_ip, acl_fetch_hdr_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP, ARG1(0,STR) },
8277 { "hdr_len", acl_parse_int, acl_fetch_hdr, acl_match_len, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8278 { "hdr_reg", acl_parse_reg, acl_fetch_hdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8279 { "hdr_sub", acl_parse_str, acl_fetch_hdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
8280 { "hdr_val", acl_parse_int, acl_fetch_hdr_val, acl_match_int, ACL_USE_L7REQ_VOLATILE, ARG1(0,STR) },
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8281
Willy Tarreau8f7406e2012-04-20 18:16:26 +0200[diff] [blame]8282 { "http_auth", acl_parse_nothing, acl_fetch_http_auth, acl_match_nothing, ACL_USE_L7REQ_VOLATILE, ARG1(0,USR) },
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8283 { "http_auth_group", acl_parse_strcat, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_VOLATILE, ARG1(0,USR) },
8284 { "http_first_req", acl_parse_nothing, acl_fetch_http_first_req, acl_match_nothing, ACL_USE_L7REQ_PERMANENT, 0 },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8285
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8286 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT, 0 },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8287
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8288 { "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP, 0 },
8289 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE, 0 },
8290 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE, 0 },
8291 { "path_dom", acl_parse_str, acl_fetch_path, acl_match_dom, ACL_USE_L7REQ_VOLATILE, 0 },
8292 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE, 0 },
8293 { "path_len", acl_parse_int, acl_fetch_path, acl_match_len, ACL_USE_L7REQ_VOLATILE, 0 },
8294 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE, 0 },
8295 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE, 0 },
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8296
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8297 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT, 0 },
8298 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP, 0 },
8299 { "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP, 0 },
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8300
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8301 { "scook", acl_parse_str, acl_fetch_cookie_value, acl_match_str, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP, ARG1(0,STR) },
8302 { "scook_beg", acl_parse_str, acl_fetch_cookie_value, acl_match_beg, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8303 { "scook_cnt", acl_parse_int, acl_fetch_cookie_cnt, acl_match_int, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8304 { "scook_dir", acl_parse_str, acl_fetch_cookie_value, acl_match_dir, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8305 { "scook_dom", acl_parse_str, acl_fetch_cookie_value, acl_match_dom, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8306 { "scook_end", acl_parse_str, acl_fetch_cookie_value, acl_match_end, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8307 { "scook_len", acl_parse_int, acl_fetch_cookie_value, acl_match_len, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8308 { "scook_reg", acl_parse_reg, acl_fetch_cookie_value, acl_match_reg, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8309 { "scook_sub", acl_parse_str, acl_fetch_cookie_value, acl_match_sub, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8310
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8311 { "shdr", acl_parse_str, acl_fetch_hdr, acl_match_str, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP, ARG1(0,STR) },
8312 { "shdr_beg", acl_parse_str, acl_fetch_hdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8313 { "shdr_cnt", acl_parse_int, acl_fetch_hdr_cnt, acl_match_int, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8314 { "shdr_dir", acl_parse_str, acl_fetch_hdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8315 { "shdr_dom", acl_parse_str, acl_fetch_hdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8316 { "shdr_end", acl_parse_str, acl_fetch_hdr, acl_match_end, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8317 { "shdr_ip", acl_parse_ip, acl_fetch_hdr_ip, acl_match_ip, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP, ARG1(0,STR) },
8318 { "shdr_len", acl_parse_int, acl_fetch_hdr, acl_match_len, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8319 { "shdr_reg", acl_parse_reg, acl_fetch_hdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8320 { "shdr_sub", acl_parse_str, acl_fetch_hdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
8321 { "shdr_val", acl_parse_int, acl_fetch_hdr_val, acl_match_int, ACL_USE_L7RTR_VOLATILE, ARG1(0,STR) },
Willy Tarreau04aa6a92012-04-06 18:57:55 +0200[diff] [blame]8322
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]8323 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT, 0 },
8324
8325 { "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP, 0 },
8326 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE, 0 },
8327 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE, 0 },
8328 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE, 0 },
8329 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE, 0 },
8330 { "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP, 0 },
8331 { "url_len", acl_parse_int, acl_fetch_url, acl_match_len, ACL_USE_L7REQ_VOLATILE, 0 },
8332 { "url_port", acl_parse_int, acl_fetch_url_port, acl_match_int, ACL_USE_L7REQ_VOLATILE, 0 },
8333 { "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE, 0 },
8334 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE, 0 },
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8335
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8336 { NULL, NULL, NULL, NULL },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8337}};
8338
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8339/************************************************************************/
8340/* The code below is dedicated to pattern fetching and matching */
8341/************************************************************************/
8342
Willy Tarreaue428fb72011-12-16 21:50:30 +0100[diff] [blame]8343/* Returns the last occurrence of specified header. */
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8344static int
Willy Tarreaue428fb72011-12-16 21:50:30 +0100[diff] [blame]8345pattern_fetch_hdr(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreauf9954102012-04-20 14:03:29 +0200[diff] [blame]8346 const struct arg *arg_p, union pattern_data *data)
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8347{
8348 struct http_txn *txn = l7;
Willy Tarreau294c4732011-12-16 21:35:50 +0100[diff] [blame]8349
Willy Tarreaue428fb72011-12-16 21:50:30 +0100[diff] [blame]8350 return http_get_hdr(&txn->req, arg_p->data.str.str, arg_p->data.str.len, &txn->hdr_idx,
8351 -1, NULL, &data->str.str, &data->str.len);
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8352}
8353
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8354/*
8355 * Given a path string and its length, find the position of beginning of the
8356 * query string. Returns NULL if no query string is found in the path.
8357 *
8358 * Example: if path = "/foo/bar/fubar?yo=mama;ye=daddy", and n = 22:
8359 *
8360 * find_query_string(path, n) points to "yo=mama;ye=daddy" string.
8361 */
8362static inline char *find_query_string(char *path, size_t path_l)
8363{
8364 char *p;
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8365
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8366 p = memchr(path, '?', path_l);
8367 return p ? p + 1 : NULL;
8368}
8369
8370static inline int is_param_delimiter(char c)
8371{
8372 return c == '&' || c == ';';
8373}
8374
8375/*
8376 * Given a url parameter, find the starting position of the first occurence,
8377 * or NULL if the parameter is not found.
8378 *
8379 * Example: if query_string is "yo=mama;ye=daddy" and url_param_name is "ye",
8380 * the function will return query_string+8.
8381 */
8382static char*
8383find_url_param_pos(char* query_string, size_t query_string_l,
8384 char* url_param_name, size_t url_param_name_l)
8385{
8386 char *pos, *last;
8387
8388 pos = query_string;
8389 last = query_string + query_string_l - url_param_name_l - 1;
8390
8391 while (pos <= last) {
8392 if (pos[url_param_name_l] == '=') {
8393 if (memcmp(pos, url_param_name, url_param_name_l) == 0)
8394 return pos;
8395 pos += url_param_name_l + 1;
8396 }
8397 while (pos <= last && !is_param_delimiter(*pos))
8398 pos++;
8399 pos++;
8400 }
8401 return NULL;
8402}
8403
8404/*
8405 * Given a url parameter name, returns its value and size into *value and
8406 * *value_l respectively, and returns non-zero. If the parameter is not found,
8407 * zero is returned and value/value_l are not touched.
8408 */
8409static int
8410find_url_param_value(char* path, size_t path_l,
8411 char* url_param_name, size_t url_param_name_l,
8412 char** value, size_t* value_l)
8413{
8414 char *query_string, *qs_end;
8415 char *arg_start;
8416 char *value_start, *value_end;
8417
8418 query_string = find_query_string(path, path_l);
8419 if (!query_string)
8420 return 0;
8421
8422 qs_end = path + path_l;
8423 arg_start = find_url_param_pos(query_string, qs_end - query_string,
8424 url_param_name, url_param_name_l);
8425 if (!arg_start)
8426 return 0;
8427
8428 value_start = arg_start + url_param_name_l + 1;
8429 value_end = value_start;
8430
8431 while ((value_end < qs_end) && !is_param_delimiter(*value_end))
8432 value_end++;
8433
8434 *value = value_start;
8435 *value_l = value_end - value_start;
Willy Tarreau00134332011-01-04 14:57:34 +0100[diff] [blame]8436 return value_end != value_start;
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8437}
8438
8439static int
8440pattern_fetch_url_param(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreauf9954102012-04-20 14:03:29 +0200[diff] [blame]8441 const struct arg *arg_p, union pattern_data *data)
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8442{
8443 struct http_txn *txn = l7;
8444 struct http_msg *msg = &txn->req;
8445 char *url_param_value;
8446 size_t url_param_value_l;
8447
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]8448 if (!find_url_param_value(msg->buf->p + msg->sol + msg->sl.rq.u, msg->sl.rq.u_l,
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8449 arg_p->data.str.str, arg_p->data.str.len,
8450 &url_param_value, &url_param_value_l))
8451 return 0;
8452
8453 data->str.str = url_param_value;
8454 data->str.len = url_param_value_l;
8455 return 1;
8456}
8457
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8458/* Try to find in request or response message is in <msg> and whose transaction
8459 * is in <txn> the last occurrence of a cookie name in all cookie header values
8460 * whose header name is <hdr_name> with name of length <hdr_name_len>. The
8461 * pointer and size of the last occurrence of the cookie value is returned into
8462 * <value> and <value_l>, and the function returns non-zero if the value was
8463 * found. Otherwise if the cookie was not found, zero is returned and neither
8464 * value nor value_l are touched. The input hdr string should begin at the
8465 * header's value, and its size should be in hdr_l. <list> must be non-zero if
8466 * value may represent a list of values (cookie headers).
8467 */
8468
8469static int
8470find_cookie_value(struct http_msg *msg, struct http_txn *txn,
8471 const char *hdr_name, int hdr_name_len,
8472 char *cookie_name, size_t cookie_name_l, int list,
Willy Tarreau3fb818c2012-04-11 17:21:08 +0200[diff] [blame]8473 char **value, int *value_l)
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8474{
8475 struct hdr_ctx ctx;
8476 int found = 0;
8477
8478 ctx.idx = 0;
Willy Tarreau3a215be2012-03-09 21:39:51 +0100[diff] [blame]8479 while (http_find_header2(hdr_name, hdr_name_len, msg->buf->p + msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreau4573af92012-04-06 18:20:06 +0200[diff] [blame]8480 char *hdr, *end;
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8481 if (ctx.vlen < cookie_name_l + 1)
8482 continue;
8483
Willy Tarreau4573af92012-04-06 18:20:06 +0200[diff] [blame]8484 hdr = ctx.line + ctx.val;
8485 end = hdr + ctx.vlen;
8486 while ((hdr = extract_cookie_value(hdr, end, cookie_name, cookie_name_l, 1, value, value_l)))
8487 found = 1;
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8488 }
8489 return found;
8490}
8491
8492static int
8493pattern_fetch_cookie(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreauf9954102012-04-20 14:03:29 +0200[diff] [blame]8494 const struct arg *arg_p, union pattern_data *data)
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8495{
8496 struct http_txn *txn = l7;
8497 struct http_msg *msg = &txn->req;
8498 char *cookie_value;
Willy Tarreau3fb818c2012-04-11 17:21:08 +0200[diff] [blame]8499 int cookie_value_l;
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8500 int found = 0;
8501
8502 found = find_cookie_value(msg, txn, "Cookie", 6,
8503 arg_p->data.str.str, arg_p->data.str.len, 1,
8504 &cookie_value, &cookie_value_l);
8505 if (found) {
8506 data->str.str = cookie_value;
8507 data->str.len = cookie_value_l;
8508 }
8509
8510 return found;
8511}
8512
8513
8514static int
8515pattern_fetch_set_cookie(struct proxy *px, struct session *l4, void *l7, int dir,
Willy Tarreauf9954102012-04-20 14:03:29 +0200[diff] [blame]8516 const struct arg *arg_p, union pattern_data *data)
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8517{
8518 struct http_txn *txn = l7;
8519 struct http_msg *msg = &txn->rsp;
8520 char *cookie_value;
Willy Tarreau3fb818c2012-04-11 17:21:08 +0200[diff] [blame]8521 int cookie_value_l;
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8522 int found = 0;
8523
8524 found = find_cookie_value(msg, txn, "Set-Cookie", 10,
8525 arg_p->data.str.str, arg_p->data.str.len, 1,
8526 &cookie_value, &cookie_value_l);
8527 if (found) {
8528 data->str.str = cookie_value;
8529 data->str.len = cookie_value_l;
8530 }
8531
8532 return found;
8533}
8534
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8535/************************************************************************/
8536/* All supported keywords must be declared here. */
8537/************************************************************************/
8538/* Note: must not be declared <const> as its list will be overwritten */
8539static struct pattern_fetch_kw_list pattern_fetch_keywords = {{ },{
Willy Tarreau21d68a62012-04-20 15:52:36 +0200[diff] [blame]8540 { "hdr", pattern_fetch_hdr, ARG1(1,STR), NULL, PATTERN_TYPE_STRING, PATTERN_FETCH_REQ },
8541 { "url_param", pattern_fetch_url_param, ARG1(1,STR), NULL, PATTERN_TYPE_STRING, PATTERN_FETCH_REQ },
8542 { "cookie", pattern_fetch_cookie, ARG1(1,STR), NULL, PATTERN_TYPE_STRING, PATTERN_FETCH_REQ },
8543 { "set-cookie", pattern_fetch_set_cookie, ARG1(1,STR), NULL, PATTERN_TYPE_STRING, PATTERN_FETCH_RTR },
Willy Tarreau9fcb9842012-04-20 14:45:49 +0200[diff] [blame]8544 { NULL, NULL, 0, 0, 0 },
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8545}};
8546
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8547
8548__attribute__((constructor))
8549static void __http_protocol_init(void)
8550{
8551 acl_register_keywords(&acl_kws);
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8552 pattern_register_fetches(&pattern_fetch_keywords);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8553}
8554
8555
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]8556/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]8557 * Local variables:
8558 * c-indent-level: 8
8559 * c-basic-offset: 8
8560 * End:
8561 */