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git01.mediatek.com / haproxy / c9ebc446b8281958e2e4618c78d0b5e1e614991e / . / src / proto_http.c
blob: acf2ea3adee7adca4f9ce2216f6e9a5ea2e868ff [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 Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]26#include <common/appsession.h>
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]27#include <common/base64.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]28#include <common/compat.h>
29#include <common/config.h>
Willy Tarreaua4cd1f52006-12-16 19:57:26 +0100[diff] [blame]30#include <common/debug.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]31#include <common/memory.h>
32#include <common/mini-clist.h>
33#include <common/standard.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200[diff] [blame]34#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]35#include <common/time.h>
36#include <common/uri_auth.h>
37#include <common/version.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]38
39#include <types/capture.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]40#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]41
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]42#include <proto/acl.h>
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]43#include <proto/auth.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]44#include <proto/backend.h>
45#include <proto/buffers.h>
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]46#include <proto/checks.h>
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]47#include <proto/dumpstats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]48#include <proto/fd.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +0200[diff] [blame]49#include <proto/frontend.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]50#include <proto/log.h>
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]51#include <proto/hdr_idx.h>
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]52#include <proto/pattern.h>
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]53#include <proto/proto_tcp.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]54#include <proto/proto_http.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]55#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]56#include <proto/queue.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]57#include <proto/server.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]58#include <proto/session.h>
Willy Tarreaucff64112008-11-03 06:26:53 +0100[diff] [blame]59#include <proto/stream_interface.h>
Willy Tarreau2d212792008-08-27 21:41:35 +0200[diff] [blame]60#include <proto/stream_sock.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]61#include <proto/task.h>
62
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]63const char HTTP_100[] =
64 "HTTP/1.1 100 Continue\r\n\r\n";
65
66const struct chunk http_100_chunk = {
67 .str = (char *)&HTTP_100,
68 .len = sizeof(HTTP_100)-1
69};
70
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]71/* Warning: no "connection" header is provided with the 3xx messages below */
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]72const char *HTTP_301 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]73 "HTTP/1.1 301 Moved Permanently\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]74 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]75 "Content-length: 0\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]76 "Location: "; /* not terminated since it will be concatenated with the URL */
77
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]78const char *HTTP_302 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]79 "HTTP/1.1 302 Found\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]80 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]81 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]82 "Location: "; /* not terminated since it will be concatenated with the URL */
83
84/* same as 302 except that the browser MUST retry with the GET method */
85const char *HTTP_303 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]86 "HTTP/1.1 303 See Other\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]87 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]88 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]89 "Location: "; /* not terminated since it will be concatenated with the URL */
90
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]91/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
92const char *HTTP_401_fmt =
93 "HTTP/1.0 401 Unauthorized\r\n"
94 "Cache-Control: no-cache\r\n"
95 "Connection: close\r\n"
Willy Tarreau791d66d2006-07-08 16:53:38 +0200[diff] [blame]96 "Content-Type: text/html\r\n"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]97 "WWW-Authenticate: Basic realm=\"%s\"\r\n"
98 "\r\n"
99 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
100
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]101const char *HTTP_407_fmt =
102 "HTTP/1.0 407 Unauthorized\r\n"
103 "Cache-Control: no-cache\r\n"
104 "Connection: close\r\n"
105 "Content-Type: text/html\r\n"
106 "Proxy-Authenticate: Basic realm=\"%s\"\r\n"
107 "\r\n"
108 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
109
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]110
111const int http_err_codes[HTTP_ERR_SIZE] = {
Willy Tarreauae94d4d2011-05-11 16:28:49 +0200[diff] [blame]112 [HTTP_ERR_200] = 200, /* used by "monitor-uri" */
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]113 [HTTP_ERR_400] = 400,
114 [HTTP_ERR_403] = 403,
115 [HTTP_ERR_408] = 408,
116 [HTTP_ERR_500] = 500,
117 [HTTP_ERR_502] = 502,
118 [HTTP_ERR_503] = 503,
119 [HTTP_ERR_504] = 504,
120};
121
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]122static const char *http_err_msgs[HTTP_ERR_SIZE] = {
Willy Tarreauae94d4d2011-05-11 16:28:49 +0200[diff] [blame]123 [HTTP_ERR_200] =
124 "HTTP/1.0 200 OK\r\n"
125 "Cache-Control: no-cache\r\n"
126 "Connection: close\r\n"
127 "Content-Type: text/html\r\n"
128 "\r\n"
129 "<html><body><h1>200 OK</h1>\nService ready.\n</body></html>\n",
130
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]131 [HTTP_ERR_400] =
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]132 "HTTP/1.0 400 Bad request\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]133 "Cache-Control: no-cache\r\n"
134 "Connection: close\r\n"
135 "Content-Type: text/html\r\n"
136 "\r\n"
137 "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
138
139 [HTTP_ERR_403] =
140 "HTTP/1.0 403 Forbidden\r\n"
141 "Cache-Control: no-cache\r\n"
142 "Connection: close\r\n"
143 "Content-Type: text/html\r\n"
144 "\r\n"
145 "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
146
147 [HTTP_ERR_408] =
148 "HTTP/1.0 408 Request Time-out\r\n"
149 "Cache-Control: no-cache\r\n"
150 "Connection: close\r\n"
151 "Content-Type: text/html\r\n"
152 "\r\n"
153 "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
154
155 [HTTP_ERR_500] =
156 "HTTP/1.0 500 Server Error\r\n"
157 "Cache-Control: no-cache\r\n"
158 "Connection: close\r\n"
159 "Content-Type: text/html\r\n"
160 "\r\n"
161 "<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
162
163 [HTTP_ERR_502] =
164 "HTTP/1.0 502 Bad Gateway\r\n"
165 "Cache-Control: no-cache\r\n"
166 "Connection: close\r\n"
167 "Content-Type: text/html\r\n"
168 "\r\n"
169 "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
170
171 [HTTP_ERR_503] =
172 "HTTP/1.0 503 Service Unavailable\r\n"
173 "Cache-Control: no-cache\r\n"
174 "Connection: close\r\n"
175 "Content-Type: text/html\r\n"
176 "\r\n"
177 "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
178
179 [HTTP_ERR_504] =
180 "HTTP/1.0 504 Gateway Time-out\r\n"
181 "Cache-Control: no-cache\r\n"
182 "Connection: close\r\n"
183 "Content-Type: text/html\r\n"
184 "\r\n"
185 "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
186
187};
188
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]189/* We must put the messages here since GCC cannot initialize consts depending
190 * on strlen().
191 */
192struct chunk http_err_chunks[HTTP_ERR_SIZE];
193
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]194#define FD_SETS_ARE_BITFIELDS
195#ifdef FD_SETS_ARE_BITFIELDS
196/*
197 * This map is used with all the FD_* macros to check whether a particular bit
198 * is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
199 * which should be encoded. When FD_ISSET() returns non-zero, it means that the
200 * byte should be encoded. Be careful to always pass bytes from 0 to 255
201 * exclusively to the macros.
202 */
203fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
204fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
205
206#else
207#error "Check if your OS uses bitfields for fd_sets"
208#endif
209
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]210void init_proto_http()
211{
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]212 int i;
213 char *tmp;
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]214 int msg;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]215
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]216 for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
217 if (!http_err_msgs[msg]) {
218 Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
219 abort();
220 }
221
222 http_err_chunks[msg].str = (char *)http_err_msgs[msg];
223 http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
224 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]225
226 /* initialize the log header encoding map : '{|}"#' should be encoded with
227 * '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
228 * URL encoding only requires '"', '#' to be encoded as well as non-
229 * printable characters above.
230 */
231 memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
232 memset(url_encode_map, 0, sizeof(url_encode_map));
233 for (i = 0; i < 32; i++) {
234 FD_SET(i, hdr_encode_map);
235 FD_SET(i, url_encode_map);
236 }
237 for (i = 127; i < 256; i++) {
238 FD_SET(i, hdr_encode_map);
239 FD_SET(i, url_encode_map);
240 }
241
242 tmp = "\"#{|}";
243 while (*tmp) {
244 FD_SET(*tmp, hdr_encode_map);
245 tmp++;
246 }
247
248 tmp = "\"#";
249 while (*tmp) {
250 FD_SET(*tmp, url_encode_map);
251 tmp++;
252 }
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]253
254 /* memory allocations */
255 pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]256 pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]257}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]258
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]259/*
260 * We have 26 list of methods (1 per first letter), each of which can have
261 * up to 3 entries (2 valid, 1 null).
262 */
263struct http_method_desc {
264 http_meth_t meth;
265 int len;
266 const char text[8];
267};
268
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]269const struct http_method_desc http_methods[26][3] = {
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]270 ['C' - 'A'] = {
271 [0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
272 },
273 ['D' - 'A'] = {
274 [0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
275 },
276 ['G' - 'A'] = {
277 [0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
278 },
279 ['H' - 'A'] = {
280 [0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
281 },
282 ['P' - 'A'] = {
283 [0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
284 [1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
285 },
286 ['T' - 'A'] = {
287 [0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
288 },
289 /* rest is empty like this :
290 * [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
291 */
292};
293
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]294/* 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]295 * table than to perform a boolean AND or OR between two tests. Refer to
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]296 * RFC2616 for those chars.
297 */
298
299const char http_is_spht[256] = {
300 [' '] = 1, ['\t'] = 1,
301};
302
303const char http_is_crlf[256] = {
304 ['\r'] = 1, ['\n'] = 1,
305};
306
307const char http_is_lws[256] = {
308 [' '] = 1, ['\t'] = 1,
309 ['\r'] = 1, ['\n'] = 1,
310};
311
312const char http_is_sep[256] = {
313 ['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
314 ['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
315 ['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
316 ['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
317 [' '] = 1, ['\t'] = 1, ['\\'] = 1,
318};
319
320const char http_is_ctl[256] = {
321 [0 ... 31] = 1,
322 [127] = 1,
323};
324
325/*
326 * A token is any ASCII char that is neither a separator nor a CTL char.
327 * Do not overwrite values in assignment since gcc-2.95 will not handle
328 * them correctly. Instead, define every non-CTL char's status.
329 */
330const char http_is_token[256] = {
331 [' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
332 ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
333 ['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
334 [','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
335 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
336 ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
337 ['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
338 ['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
339 ['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
340 ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
341 ['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
342 ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
343 ['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
344 ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
345 ['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
346 ['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
347 ['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
348 ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
349 ['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
350 ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
351 ['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
352 ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
353 ['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
354 ['|'] = 1, ['}'] = 0, ['~'] = 1,
355};
356
357
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]358/*
359 * An http ver_token is any ASCII which can be found in an HTTP version,
360 * which includes 'H', 'T', 'P', '/', '.' and any digit.
361 */
362const char http_is_ver_token[256] = {
363 ['.'] = 1, ['/'] = 1,
364 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
365 ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
366 ['H'] = 1, ['P'] = 1, ['T'] = 1,
367};
368
369
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]370/*
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]371 * Silent debug that outputs only in strace, using fd #-1. Trash is modified.
372 */
373#if defined(DEBUG_FSM)
374static void http_silent_debug(int line, struct session *s)
375{
376 int size = 0;
377 size += snprintf(trash + size, sizeof(trash) - size,
378 "[%04d] req: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p lr=%p sm=%d fw=%ld tf=%08x\n",
379 line,
380 s->si[0].state, s->si[0].fd, s->txn.req.msg_state, s->req->flags, s->req->analysers,
381 s->req->data, s->req->size, s->req->l, s->req->w, s->req->r, s->req->lr, s->req->send_max, s->req->to_forward, s->txn.flags);
382 write(-1, trash, size);
383 size = 0;
384 size += snprintf(trash + size, sizeof(trash) - size,
385 " %04d rep: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p lr=%p sm=%d fw=%ld\n",
386 line,
387 s->si[1].state, s->si[1].fd, s->txn.rsp.msg_state, s->rep->flags, s->rep->analysers,
388 s->rep->data, s->rep->size, s->rep->l, s->rep->w, s->rep->r, s->rep->lr, s->rep->send_max, s->rep->to_forward);
389
390 write(-1, trash, size);
391}
392#else
393#define http_silent_debug(l,s) do { } while (0)
394#endif
395
396/*
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]397 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
398 * CRLF. Text length is measured first, so it cannot be NULL.
399 * The header is also automatically added to the index <hdr_idx>, and the end
400 * of headers is automatically adjusted. The number of bytes added is returned
401 * on success, otherwise <0 is returned indicating an error.
402 */
403int http_header_add_tail(struct buffer *b, struct http_msg *msg,
404 struct hdr_idx *hdr_idx, const char *text)
405{
406 int bytes, len;
407
408 len = strlen(text);
409 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
410 if (!bytes)
411 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]412 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]413 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
414}
415
416/*
417 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
418 * CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
419 * the buffer is only opened and the space reserved, but nothing is copied.
420 * The header is also automatically added to the index <hdr_idx>, and the end
421 * of headers is automatically adjusted. The number of bytes added is returned
422 * on success, otherwise <0 is returned indicating an error.
423 */
424int http_header_add_tail2(struct buffer *b, struct http_msg *msg,
425 struct hdr_idx *hdr_idx, const char *text, int len)
426{
427 int bytes;
428
429 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
430 if (!bytes)
431 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]432 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]433 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
434}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]435
436/*
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]437 * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
438 * If so, returns the position of the first non-space character relative to
439 * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
440 * to return a pointer to the place after the first space. Returns 0 if the
441 * header name does not match. Checks are case-insensitive.
442 */
443int http_header_match2(const char *hdr, const char *end,
444 const char *name, int len)
445{
446 const char *val;
447
448 if (hdr + len >= end)
449 return 0;
450 if (hdr[len] != ':')
451 return 0;
452 if (strncasecmp(hdr, name, len) != 0)
453 return 0;
454 val = hdr + len + 1;
455 while (val < end && HTTP_IS_SPHT(*val))
456 val++;
457 if ((val >= end) && (len + 2 <= end - hdr))
458 return len + 2; /* we may replace starting from second space */
459 return val - hdr;
460}
461
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]462/* Find the end of the header value contained between <s> and <e>. See RFC2616,
463 * par 2.2 for more information. Note that it requires a valid header to return
464 * a valid result. This works for headers defined as comma-separated lists.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]465 */
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]466char *find_hdr_value_end(char *s, const char *e)
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]467{
468 int quoted, qdpair;
469
470 quoted = qdpair = 0;
471 for (; s < e; s++) {
472 if (qdpair) qdpair = 0;
Willy Tarreau0f7f51f2010-08-30 11:06:34 +0200[diff] [blame]473 else if (quoted) {
474 if (*s == '\\') qdpair = 1;
475 else if (*s == '"') quoted = 0;
476 }
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]477 else if (*s == '"') quoted = 1;
478 else if (*s == ',') return s;
479 }
480 return s;
481}
482
483/* Find the first or next occurrence of header <name> in message buffer <sol>
484 * using headers index <idx>, and return it in the <ctx> structure. This
485 * structure holds everything necessary to use the header and find next
486 * occurrence. If its <idx> member is 0, the header is searched from the
487 * beginning. Otherwise, the next occurrence is returned. The function returns
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]488 * 1 when it finds a value, and 0 when there is no more. It is designed to work
489 * with headers defined as comma-separated lists. As a special case, if ctx->val
490 * is NULL when searching for a new values of a header, the current header is
491 * rescanned. This allows rescanning after a header deletion.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]492 */
493int http_find_header2(const char *name, int len,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]494 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]495 struct hdr_ctx *ctx)
496{
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]497 char *eol, *sov;
498 int cur_idx, old_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]499
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]500 cur_idx = ctx->idx;
501 if (cur_idx) {
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]502 /* We have previously returned a value, let's search
503 * another one on the same line.
504 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]505 sol = ctx->line;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]506 ctx->del = ctx->val + ctx->vlen;
507 sov = sol + ctx->del;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]508 eol = sol + idx->v[cur_idx].len;
509
510 if (sov >= eol)
511 /* no more values in this header */
512 goto next_hdr;
513
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]514 /* values remaining for this header, skip the comma but save it
515 * for later use (eg: for header deletion).
516 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]517 sov++;
518 while (sov < eol && http_is_lws[(unsigned char)*sov])
519 sov++;
520
521 goto return_hdr;
522 }
523
524 /* first request for this header */
525 sol += hdr_idx_first_pos(idx);
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]526 old_idx = 0;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]527 cur_idx = hdr_idx_first_idx(idx);
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]528 while (cur_idx) {
529 eol = sol + idx->v[cur_idx].len;
530
Willy Tarreau1ad7c6d2007-06-10 21:42:55 +0200[diff] [blame]531 if (len == 0) {
532 /* No argument was passed, we want any header.
533 * To achieve this, we simply build a fake request. */
534 while (sol + len < eol && sol[len] != ':')
535 len++;
536 name = sol;
537 }
538
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]539 if ((len < eol - sol) &&
540 (sol[len] == ':') &&
541 (strncasecmp(sol, name, len) == 0)) {
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]542 ctx->del = len;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]543 sov = sol + len + 1;
544 while (sov < eol && http_is_lws[(unsigned char)*sov])
545 sov++;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]546
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]547 ctx->line = sol;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]548 ctx->prev = old_idx;
549 return_hdr:
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]550 ctx->idx = cur_idx;
551 ctx->val = sov - sol;
552
553 eol = find_hdr_value_end(sov, eol);
554 ctx->vlen = eol - sov;
555 return 1;
556 }
557 next_hdr:
558 sol = eol + idx->v[cur_idx].cr + 1;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]559 old_idx = cur_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]560 cur_idx = idx->v[cur_idx].next;
561 }
562 return 0;
563}
564
565int http_find_header(const char *name,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]566 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]567 struct hdr_ctx *ctx)
568{
569 return http_find_header2(name, strlen(name), sol, idx, ctx);
570}
571
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]572/* Remove one value of a header. This only works on a <ctx> returned by one of
573 * the http_find_header functions. The value is removed, as well as surrounding
574 * commas if any. If the removed value was alone, the whole header is removed.
575 * The ctx is always updated accordingly, as well as buffer <buf> and HTTP
576 * message <msg>. The new index is returned. If it is zero, it means there is
577 * no more header, so any processing may stop. The ctx is always left in a form
578 * that can be handled by http_find_header2() to find next occurrence.
579 */
580int http_remove_header2(struct http_msg *msg, struct buffer *buf,
581 struct hdr_idx *idx, struct hdr_ctx *ctx)
582{
583 int cur_idx = ctx->idx;
584 char *sol = ctx->line;
585 struct hdr_idx_elem *hdr;
586 int delta, skip_comma;
587
588 if (!cur_idx)
589 return 0;
590
591 hdr = &idx->v[cur_idx];
592 if (sol[ctx->del] == ':' && ctx->val + ctx->vlen == hdr->len) {
593 /* This was the only value of the header, we must now remove it entirely. */
594 delta = buffer_replace2(buf, sol, sol + hdr->len + hdr->cr + 1, NULL, 0);
595 http_msg_move_end(msg, delta);
596 idx->used--;
597 hdr->len = 0; /* unused entry */
598 idx->v[ctx->prev].next = idx->v[ctx->idx].next;
Willy Tarreau5c4784f2011-02-12 13:07:35 +0100[diff] [blame]599 if (idx->tail == ctx->idx)
600 idx->tail = ctx->prev;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]601 ctx->idx = ctx->prev; /* walk back to the end of previous header */
602 ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1;
603 ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */
604 ctx->vlen = 0;
605 return ctx->idx;
606 }
607
608 /* This was not the only value of this header. We have to remove between
609 * ctx->del+1 and ctx->val+ctx->vlen+1 included. If it is the last entry
610 * of the list, we remove the last separator.
611 */
612
613 skip_comma = (ctx->val + ctx->vlen == hdr->len) ? 0 : 1;
614 delta = buffer_replace2(buf, sol + ctx->del + skip_comma,
615 sol + ctx->val + ctx->vlen + skip_comma,
616 NULL, 0);
617 hdr->len += delta;
618 http_msg_move_end(msg, delta);
619 ctx->val = ctx->del;
620 ctx->vlen = 0;
621 return ctx->idx;
622}
623
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]624/* This function handles a server error at the stream interface level. The
625 * stream interface is assumed to be already in a closed state. An optional
626 * message is copied into the input buffer, and an HTTP status code stored.
627 * The error flags are set to the values in arguments. Any pending request
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]628 * in this buffer will be lost.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]629 */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]630static void http_server_error(struct session *t, struct stream_interface *si,
631 int err, int finst, int status, const struct chunk *msg)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]632{
Willy Tarreaud5fd51c2010-01-22 14:17:47 +0100[diff] [blame]633 buffer_auto_read(si->ob);
634 buffer_abort(si->ob);
635 buffer_auto_close(si->ob);
636 buffer_erase(si->ob);
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]637 buffer_auto_close(si->ib);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]638 buffer_auto_read(si->ib);
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]639 if (status > 0 && msg) {
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]640 t->txn.status = status;
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]641 buffer_write(si->ib, msg->str, msg->len);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]642 }
643 if (!(t->flags & SN_ERR_MASK))
644 t->flags |= err;
645 if (!(t->flags & SN_FINST_MASK))
646 t->flags |= finst;
647}
648
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]649/* This function returns the appropriate error location for the given session
650 * and message.
651 */
652
653struct chunk *error_message(struct session *s, int msgnum)
654{
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]655 if (s->be->errmsg[msgnum].str)
656 return &s->be->errmsg[msgnum];
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]657 else if (s->fe->errmsg[msgnum].str)
658 return &s->fe->errmsg[msgnum];
659 else
660 return &http_err_chunks[msgnum];
661}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]662
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]663/*
664 * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
665 * string), HTTP_METH_OTHER for unknown methods, or the identified method.
666 */
667static http_meth_t find_http_meth(const char *str, const int len)
668{
669 unsigned char m;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]670 const struct http_method_desc *h;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]671
672 m = ((unsigned)*str - 'A');
673
674 if (m < 26) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]675 for (h = http_methods[m]; h->len > 0; h++) {
676 if (unlikely(h->len != len))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]677 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]678 if (likely(memcmp(str, h->text, h->len) == 0))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]679 return h->meth;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]680 };
681 return HTTP_METH_OTHER;
682 }
683 return HTTP_METH_NONE;
684
685}
686
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]687/* Parse the URI from the given transaction (which is assumed to be in request
688 * phase) and look for the "/" beginning the PATH. If not found, return NULL.
689 * It is returned otherwise.
690 */
691static char *
692http_get_path(struct http_txn *txn)
693{
694 char *ptr, *end;
695
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]696 ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]697 end = ptr + txn->req.sl.rq.u_l;
698
699 if (ptr >= end)
700 return NULL;
701
702 /* RFC2616, par. 5.1.2 :
703 * Request-URI = "*" | absuri | abspath | authority
704 */
705
706 if (*ptr == '*')
707 return NULL;
708
709 if (isalpha((unsigned char)*ptr)) {
710 /* this is a scheme as described by RFC3986, par. 3.1 */
711 ptr++;
712 while (ptr < end &&
713 (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
714 ptr++;
715 /* skip '://' */
716 if (ptr == end || *ptr++ != ':')
717 return NULL;
718 if (ptr == end || *ptr++ != '/')
719 return NULL;
720 if (ptr == end || *ptr++ != '/')
721 return NULL;
722 }
723 /* skip [user[:passwd]@]host[:[port]] */
724
725 while (ptr < end && *ptr != '/')
726 ptr++;
727
728 if (ptr == end)
729 return NULL;
730
731 /* OK, we got the '/' ! */
732 return ptr;
733}
734
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]735/* Returns a 302 for a redirectable request. This may only be called just after
736 * the stream interface has moved to SI_ST_ASS. Unprocessable requests are
737 * left unchanged and will follow normal proxy processing.
738 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]739void perform_http_redirect(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]740{
741 struct http_txn *txn;
742 struct chunk rdr;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]743 struct server *srv;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]744 char *path;
745 int len;
746
747 /* 1: create the response header */
748 rdr.len = strlen(HTTP_302);
749 rdr.str = trash;
Willy Tarreau59e0b0f2010-01-09 21:29:23 +0100[diff] [blame]750 rdr.size = sizeof(trash);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]751 memcpy(rdr.str, HTTP_302, rdr.len);
752
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]753 srv = target_srv(&s->target);
754
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]755 /* 2: add the server's prefix */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]756 if (rdr.len + srv->rdr_len > rdr.size)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]757 return;
758
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]759 /* special prefix "/" means don't change URL */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]760 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
761 memcpy(rdr.str + rdr.len, srv->rdr_pfx, srv->rdr_len);
762 rdr.len += srv->rdr_len;
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]763 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]764
765 /* 3: add the request URI */
766 txn = &s->txn;
767 path = http_get_path(txn);
768 if (!path)
769 return;
770
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]771 len = txn->req.sl.rq.u_l + (txn->req.sol + txn->req.sl.rq.u) - path;
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]772 if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]773 return;
774
775 memcpy(rdr.str + rdr.len, path, len);
776 rdr.len += len;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]777
778 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
779 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
780 rdr.len += 29;
781 } else {
782 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
783 rdr.len += 23;
784 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]785
786 /* prepare to return without error. */
Willy Tarreau99126c32008-11-27 10:30:51 +0100[diff] [blame]787 si->shutr(si);
788 si->shutw(si);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]789 si->err_type = SI_ET_NONE;
790 si->err_loc = NULL;
791 si->state = SI_ST_CLO;
792
793 /* send the message */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]794 http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]795
796 /* FIXME: we should increase a counter of redirects per server and per backend. */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]797 if (srv)
798 srv_inc_sess_ctr(srv);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]799}
800
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]801/* Return the error message corresponding to si->err_type. It is assumed
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]802 * that the server side is closed. Note that err_type is actually a
803 * bitmask, where almost only aborts may be cumulated with other
804 * values. We consider that aborted operations are more important
805 * than timeouts or errors due to the fact that nobody else in the
806 * logs might explain incomplete retries. All others should avoid
807 * being cumulated. It should normally not be possible to have multiple
808 * aborts at once, but just in case, the first one in sequence is reported.
809 */
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]810void http_return_srv_error(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]811{
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]812 int err_type = si->err_type;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]813
814 if (err_type & SI_ET_QUEUE_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]815 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
816 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]817 else if (err_type & SI_ET_CONN_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]818 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
819 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]820 else if (err_type & SI_ET_QUEUE_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]821 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
822 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]823 else if (err_type & SI_ET_QUEUE_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]824 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q,
825 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]826 else if (err_type & SI_ET_CONN_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]827 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
828 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]829 else if (err_type & SI_ET_CONN_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]830 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
831 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]832 else /* SI_ET_CONN_OTHER and others */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]833 http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
834 500, error_message(s, HTTP_ERR_500));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]835}
836
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]837extern const char sess_term_cond[8];
838extern const char sess_fin_state[8];
839extern const char *monthname[12];
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]840const char sess_cookie[8] = "NIDVEO67"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie, Expired cookie, Old cookie, unknown */
841const char sess_set_cookie[8] = "NPDIRU67"; /* No set-cookie, Set-cookie found and left unchanged (passive),
842 Set-cookie Deleted, Set-Cookie Inserted, Set-cookie Rewritten,
843 Set-cookie Updated, unknown, unknown */
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]844struct pool_head *pool2_requri;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]845struct pool_head *pool2_capture;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]846
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]847void http_sess_clflog(struct session *s)
848{
Cyril Bontéacd7d632010-11-01 19:26:02 +0100[diff] [blame]849 char pn[INET6_ADDRSTRLEN];
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]850 struct proxy *fe = s->fe;
851 struct proxy *be = s->be;
852 struct proxy *prx_log;
853 struct http_txn *txn = &s->txn;
854 int tolog, level, err;
855 char *uri, *h;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]856 const char *svid;
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]857 struct tm tm;
858 static char tmpline[MAX_SYSLOG_LEN];
859 int hdr;
860 size_t w;
861 int t_request;
862
863 prx_log = fe;
864 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]865 (s->req->cons->conn_retries != be->conn_retries) ||
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]866 txn->status >= 500;
867
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]868 if (s->req->prod->addr.c.from.ss_family == AF_INET)
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]869 inet_ntop(AF_INET,
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]870 (const void *)&((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_addr,
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]871 pn, sizeof(pn));
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]872 else if (s->req->prod->addr.c.from.ss_family == AF_INET6)
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]873 inet_ntop(AF_INET6,
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]874 (const void *)&((struct sockaddr_in6 *)(&s->req->prod->addr.c.from))->sin6_addr,
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]875 pn, sizeof(pn));
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]876 else
877 snprintf(pn, sizeof(pn), "unix:%d", s->listener->luid);
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]878
879 get_gmtime(s->logs.accept_date.tv_sec, &tm);
880
881 /* FIXME: let's limit ourselves to frontend logging for now. */
882 tolog = fe->to_log;
883
884 h = tmpline;
885
886 w = snprintf(h, sizeof(tmpline),
887 "%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
888 pn,
889 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
890 tm.tm_hour, tm.tm_min, tm.tm_sec);
891 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
892 goto trunc;
893 h += w;
894
895 if (h >= tmpline + sizeof(tmpline) - 4)
896 goto trunc;
897
898 *(h++) = ' ';
899 *(h++) = '\"';
900 uri = txn->uri ? txn->uri : "<BADREQ>";
901 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
902 '#', url_encode_map, uri);
903 *(h++) = '\"';
904
905 w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
906 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
907 goto trunc;
908 h += w;
909
910 if (h >= tmpline + sizeof(tmpline) - 9)
911 goto trunc;
912 memcpy(h, " \"-\" \"-\"", 8);
913 h += 8;
914
915 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
916 " %d %03d",
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]917 s->req->prod->addr.c.from.ss_family == AF_UNIX ? s->listener->luid :
918 ntohs((s->req->prod->addr.c.from.ss_family == AF_INET) ?
919 ((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_port :
920 ((struct sockaddr_in6 *)&s->req->prod->addr.c.from)->sin6_port),
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]921 (int)s->logs.accept_date.tv_usec/1000);
922 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
923 goto trunc;
924 h += w;
925
926 w = strlen(fe->id);
927 if (h >= tmpline + sizeof(tmpline) - 4 - w)
928 goto trunc;
929 *(h++) = ' ';
930 *(h++) = '\"';
931 memcpy(h, fe->id, w);
932 h += w;
933 *(h++) = '\"';
934
935 w = strlen(be->id);
936 if (h >= tmpline + sizeof(tmpline) - 4 - w)
937 goto trunc;
938 *(h++) = ' ';
939 *(h++) = '\"';
940 memcpy(h, be->id, w);
941 h += w;
942 *(h++) = '\"';
943
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]944 if (!(tolog & LW_SVID))
945 svid = "-";
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]946 else switch (s->target.type) {
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]947 case TARG_TYPE_SERVER:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]948 svid = s->target.ptr.s->id;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]949 break;
950 case TARG_TYPE_APPLET:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]951 svid = s->target.ptr.a->name;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]952 break;
953 default:
954 svid = "<NOSRV>";
955 break;
956 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]957
958 w = strlen(svid);
959 if (h >= tmpline + sizeof(tmpline) - 4 - w)
960 goto trunc;
961 *(h++) = ' ';
962 *(h++) = '\"';
963 memcpy(h, svid, w);
964 h += w;
965 *(h++) = '\"';
966
967 t_request = -1;
968 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
969 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
970 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
971 " %d %ld %ld %ld %ld",
972 t_request,
973 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
974 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
975 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
976 s->logs.t_close);
977 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
978 goto trunc;
979 h += w;
980
981 if (h >= tmpline + sizeof(tmpline) - 8)
982 goto trunc;
983 *(h++) = ' ';
984 *(h++) = '\"';
985 *(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
986 *(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
987 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
988 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
989 *(h++) = '\"';
990
991 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
992 " %d %d %d %d %d %ld %ld",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]993 actconn, fe->feconn, be->beconn, target_srv(&s->target) ? target_srv(&s->target)->cur_sess : 0,
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]994 (s->req->cons->conn_retries > 0) ? (be->conn_retries - s->req->cons->conn_retries) : be->conn_retries,
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]995 s->logs.srv_queue_size, s->logs.prx_queue_size);
996
997 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
998 goto trunc;
999 h += w;
1000
1001 if (txn->cli_cookie) {
1002 w = strlen(txn->cli_cookie);
1003 if (h >= tmpline + sizeof(tmpline) - 4 - w)
1004 goto trunc;
1005 *(h++) = ' ';
1006 *(h++) = '\"';
1007 memcpy(h, txn->cli_cookie, w);
1008 h += w;
1009 *(h++) = '\"';
1010 } else {
1011 if (h >= tmpline + sizeof(tmpline) - 5)
1012 goto trunc;
1013 memcpy(h, " \"-\"", 4);
1014 h += 4;
1015 }
1016
1017 if (txn->srv_cookie) {
1018 w = strlen(txn->srv_cookie);
1019 if (h >= tmpline + sizeof(tmpline) - 4 - w)
1020 goto trunc;
1021 *(h++) = ' ';
1022 *(h++) = '\"';
1023 memcpy(h, txn->srv_cookie, w);
1024 h += w;
1025 *(h++) = '\"';
1026 } else {
1027 if (h >= tmpline + sizeof(tmpline) - 5)
1028 goto trunc;
1029 memcpy(h, " \"-\"", 4);
1030 h += 4;
1031 }
1032
1033 if ((fe->to_log & LW_REQHDR) && txn->req.cap) {
1034 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1035 if (h >= sizeof (tmpline) + tmpline - 4)
1036 goto trunc;
Cyril Bonté7f2c5392010-03-13 15:15:07 +0100[diff] [blame]1037 if (txn->req.cap[hdr] != NULL) {
1038 *(h++) = ' ';
1039 *(h++) = '\"';
1040 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1041 '#', hdr_encode_map, txn->req.cap[hdr]);
1042 *(h++) = '\"';
1043 } else {
1044 memcpy(h, " \"-\"", 4);
1045 h += 4;
1046 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1047 }
1048 }
1049
1050 if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) {
1051 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1052 if (h >= sizeof (tmpline) + tmpline - 4)
1053 goto trunc;
Cyril Bonté7f2c5392010-03-13 15:15:07 +0100[diff] [blame]1054 if (txn->rsp.cap[hdr] != NULL) {
1055 *(h++) = ' ';
1056 *(h++) = '\"';
1057 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1058 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1059 *(h++) = '\"';
1060 } else {
1061 memcpy(h, " \"-\"", 4);
1062 h += 4;
1063 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1064 }
1065 }
1066
1067trunc:
1068 *h = '\0';
1069
1070 level = LOG_INFO;
1071 if (err && (fe->options2 & PR_O2_LOGERRORS))
1072 level = LOG_ERR;
1073
1074 send_log(prx_log, level, "%s\n", tmpline);
1075
1076 s->logs.logwait = 0;
1077}
1078
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1079/*
1080 * send a log for the session when we have enough info about it.
1081 * Will not log if the frontend has no log defined.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1082 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]1083void http_sess_log(struct session *s)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1084{
Cyril Bontéacd7d632010-11-01 19:26:02 +0100[diff] [blame]1085 char pn[INET6_ADDRSTRLEN];
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1086 struct proxy *fe = s->fe;
1087 struct proxy *be = s->be;
1088 struct proxy *prx_log;
1089 struct http_txn *txn = &s->txn;
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1090 int tolog, level, err;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1091 char *uri, *h;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1092 const char *svid;
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1093 struct tm tm;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1094 static char tmpline[MAX_SYSLOG_LEN];
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1095 int t_request;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1096 int hdr;
1097
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1098 /* if we don't want to log normal traffic, return now */
1099 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]1100 (s->req->cons->conn_retries != be->conn_retries) ||
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1101 txn->status >= 500;
1102 if (!err && (fe->options2 & PR_O2_NOLOGNORM))
1103 return;
1104
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1105 if (fe->logfac1 < 0 && fe->logfac2 < 0)
1106 return;
1107 prx_log = fe;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1108
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1109 if (prx_log->options2 & PR_O2_CLFLOG)
1110 return http_sess_clflog(s);
1111
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]1112 if (s->req->prod->addr.c.from.ss_family == AF_INET)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1113 inet_ntop(AF_INET,
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]1114 (const void *)&((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_addr,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1115 pn, sizeof(pn));
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]1116 else if (s->req->prod->addr.c.from.ss_family == AF_INET6)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1117 inet_ntop(AF_INET6,
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]1118 (const void *)&((struct sockaddr_in6 *)(&s->req->prod->addr.c.from))->sin6_addr,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1119 pn, sizeof(pn));
1120
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200[diff] [blame]1121 get_localtime(s->logs.accept_date.tv_sec, &tm);
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1122
1123 /* FIXME: let's limit ourselves to frontend logging for now. */
1124 tolog = fe->to_log;
1125
1126 h = tmpline;
1127 if (fe->to_log & LW_REQHDR &&
1128 txn->req.cap &&
1129 (h < tmpline + sizeof(tmpline) - 10)) {
1130 *(h++) = ' ';
1131 *(h++) = '{';
1132 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1133 if (hdr)
1134 *(h++) = '|';
1135 if (txn->req.cap[hdr] != NULL)
1136 h = encode_string(h, tmpline + sizeof(tmpline) - 7,
1137 '#', hdr_encode_map, txn->req.cap[hdr]);
1138 }
1139 *(h++) = '}';
1140 }
1141
1142 if (fe->to_log & LW_RSPHDR &&
1143 txn->rsp.cap &&
1144 (h < tmpline + sizeof(tmpline) - 7)) {
1145 *(h++) = ' ';
1146 *(h++) = '{';
1147 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1148 if (hdr)
1149 *(h++) = '|';
1150 if (txn->rsp.cap[hdr] != NULL)
1151 h = encode_string(h, tmpline + sizeof(tmpline) - 4,
1152 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1153 }
1154 *(h++) = '}';
1155 }
1156
1157 if (h < tmpline + sizeof(tmpline) - 4) {
1158 *(h++) = ' ';
1159 *(h++) = '"';
1160 uri = txn->uri ? txn->uri : "<BADREQ>";
1161 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
1162 '#', url_encode_map, uri);
1163 *(h++) = '"';
1164 }
1165 *h = '\0';
1166
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1167 if (!(tolog & LW_SVID))
1168 svid = "-";
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]1169 else switch (s->target.type) {
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1170 case TARG_TYPE_SERVER:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]1171 svid = s->target.ptr.s->id;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1172 break;
1173 case TARG_TYPE_APPLET:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]1174 svid = s->target.ptr.a->name;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1175 break;
1176 default:
1177 svid = "<NOSRV>";
1178 break;
1179 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1180
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1181 t_request = -1;
1182 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
1183 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
1184
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1185 level = LOG_INFO;
1186 if (err && (fe->options2 & PR_O2_LOGERRORS))
1187 level = LOG_ERR;
1188
1189 send_log(prx_log, level,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1190 "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1191 " %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld"
1192 " %s %s %c%c%c%c %d/%d/%d/%d/%s%u %ld/%ld%s\n",
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]1193 (s->req->prod->addr.c.from.ss_family == AF_UNIX) ? "unix" : pn,
1194 (s->req->prod->addr.c.from.ss_family == AF_UNIX) ? s->listener->luid :
1195 ntohs((s->req->prod->addr.c.from.ss_family == AF_INET) ?
1196 ((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_port :
1197 ((struct sockaddr_in6 *)&s->req->prod->addr.c.from)->sin6_port),
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1198 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1199 tm.tm_hour, tm.tm_min, tm.tm_sec, (int)s->logs.accept_date.tv_usec/1000,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1200 fe->id, be->id, svid,
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1201 t_request,
1202 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1203 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
1204 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
1205 (tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
1206 txn->status,
Willy Tarreau8b3977f2008-01-18 11:16:32 +0100[diff] [blame]1207 (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1208 txn->cli_cookie ? txn->cli_cookie : "-",
1209 txn->srv_cookie ? txn->srv_cookie : "-",
1210 sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
1211 sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
1212 (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
1213 (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-',
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]1214 actconn, fe->feconn, be->beconn, target_srv(&s->target) ? target_srv(&s->target)->cur_sess : 0,
Krzysztof Piotr Oledzki25b501a2008-01-06 16:36:16 +0100[diff] [blame]1215 (s->flags & SN_REDISP)?"+":"",
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]1216 (s->req->cons->conn_retries>0)?(be->conn_retries - s->req->cons->conn_retries):be->conn_retries,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1217 s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline);
1218
1219 s->logs.logwait = 0;
1220}
1221
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1222
1223/*
1224 * Capture headers from message starting at <som> according to header list
1225 * <cap_hdr>, and fill the <idx> structure appropriately.
1226 */
1227void capture_headers(char *som, struct hdr_idx *idx,
1228 char **cap, struct cap_hdr *cap_hdr)
1229{
1230 char *eol, *sol, *col, *sov;
1231 int cur_idx;
1232 struct cap_hdr *h;
1233 int len;
1234
1235 sol = som + hdr_idx_first_pos(idx);
1236 cur_idx = hdr_idx_first_idx(idx);
1237
1238 while (cur_idx) {
1239 eol = sol + idx->v[cur_idx].len;
1240
1241 col = sol;
1242 while (col < eol && *col != ':')
1243 col++;
1244
1245 sov = col + 1;
1246 while (sov < eol && http_is_lws[(unsigned char)*sov])
1247 sov++;
1248
1249 for (h = cap_hdr; h; h = h->next) {
1250 if ((h->namelen == col - sol) &&
1251 (strncasecmp(sol, h->name, h->namelen) == 0)) {
1252 if (cap[h->index] == NULL)
1253 cap[h->index] =
Willy Tarreaucf7f3202007-05-13 22:46:04 +0200[diff] [blame]1254 pool_alloc2(h->pool);
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1255
1256 if (cap[h->index] == NULL) {
1257 Alert("HTTP capture : out of memory.\n");
1258 continue;
1259 }
1260
1261 len = eol - sov;
1262 if (len > h->len)
1263 len = h->len;
1264
1265 memcpy(cap[h->index], sov, len);
1266 cap[h->index][len]=0;
1267 }
1268 }
1269 sol = eol + idx->v[cur_idx].cr + 1;
1270 cur_idx = idx->v[cur_idx].next;
1271 }
1272}
1273
1274
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1275/* either we find an LF at <ptr> or we jump to <bad>.
1276 */
1277#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
1278
1279/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
1280 * otherwise to <http_msg_ood> with <state> set to <st>.
1281 */
1282#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
1283 ptr++; \
1284 if (likely(ptr < end)) \
1285 goto good; \
1286 else { \
1287 state = (st); \
1288 goto http_msg_ood; \
1289 } \
1290 } while (0)
1291
1292
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1293/*
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1294 * This function parses a status line between <ptr> and <end>, starting with
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1295 * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
1296 * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
1297 * will give undefined results.
1298 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1299 * and that msg->sol points to the beginning of the response.
1300 * If a complete line is found (which implies that at least one CR or LF is
1301 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1302 * returned indicating an incomplete line (which does not mean that parts have
1303 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1304 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1305 * upon next call.
1306 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1307 * This function was intentionally designed to be called from
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1308 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1309 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1310 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1311 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1312const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
1313 unsigned int state, const char *ptr, const char *end,
1314 char **ret_ptr, unsigned int *ret_state)
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1315{
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1316 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1317 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1318 http_msg_rpver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1319 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1320 EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
1321
1322 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1323 msg->sl.st.v_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1324 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1325 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1326 state = HTTP_MSG_ERROR;
1327 break;
1328
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1329 case HTTP_MSG_RPVER_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1330 http_msg_rpver_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1331 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1332 msg->sl.st.c = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1333 goto http_msg_rpcode;
1334 }
1335 if (likely(HTTP_IS_SPHT(*ptr)))
1336 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1337 /* so it's a CR/LF, this is invalid */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1338 state = HTTP_MSG_ERROR;
1339 break;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1340
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1341 case HTTP_MSG_RPCODE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1342 http_msg_rpcode:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1343 if (likely(!HTTP_IS_LWS(*ptr)))
1344 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
1345
1346 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1347 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1348 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1349 }
1350
1351 /* so it's a CR/LF, so there is no reason phrase */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1352 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1353 http_msg_rsp_reason:
1354 /* FIXME: should we support HTTP responses without any reason phrase ? */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1355 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1356 msg->sl.st.r_l = 0;
1357 goto http_msg_rpline_eol;
1358
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1359 case HTTP_MSG_RPCODE_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1360 http_msg_rpcode_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1361 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1362 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1363 goto http_msg_rpreason;
1364 }
1365 if (likely(HTTP_IS_SPHT(*ptr)))
1366 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1367 /* so it's a CR/LF, so there is no reason phrase */
1368 goto http_msg_rsp_reason;
1369
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1370 case HTTP_MSG_RPREASON:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1371 http_msg_rpreason:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1372 if (likely(!HTTP_IS_CRLF(*ptr)))
1373 EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1374 msg->sl.st.r_l = (ptr - msg_buf) - msg->som - msg->sl.st.r;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1375 http_msg_rpline_eol:
1376 /* We have seen the end of line. Note that we do not
1377 * necessarily have the \n yet, but at least we know that we
1378 * have EITHER \r OR \n, otherwise the response would not be
1379 * complete. We can then record the response length and return
1380 * to the caller which will be able to register it.
1381 */
1382 msg->sl.st.l = ptr - msg->sol;
1383 return ptr;
1384
1385#ifdef DEBUG_FULL
1386 default:
1387 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1388 exit(1);
1389#endif
1390 }
1391
1392 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1393 /* out of valid data */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1394 if (ret_state)
1395 *ret_state = state;
1396 if (ret_ptr)
1397 *ret_ptr = (char *)ptr;
1398 return NULL;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1399}
1400
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1401/*
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1402 * This function parses a request line between <ptr> and <end>, starting with
1403 * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
1404 * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
1405 * will give undefined results.
1406 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1407 * and that msg->sol points to the beginning of the request.
1408 * If a complete line is found (which implies that at least one CR or LF is
1409 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1410 * returned indicating an incomplete line (which does not mean that parts have
1411 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1412 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1413 * upon next call.
1414 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1415 * This function was intentionally designed to be called from
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1416 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1417 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1418 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1419 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1420const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
1421 unsigned int state, const char *ptr, const char *end,
1422 char **ret_ptr, unsigned int *ret_state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1423{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1424 switch (state) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1425 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1426 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1427 if (likely(HTTP_IS_TOKEN(*ptr)))
1428 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1429
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1430 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1431 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1432 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1433 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1434
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1435 if (likely(HTTP_IS_CRLF(*ptr))) {
1436 /* HTTP 0.9 request */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1437 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1438 http_msg_req09_uri:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1439 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1440 http_msg_req09_uri_e:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1441 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1442 http_msg_req09_ver:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1443 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1444 msg->sl.rq.v_l = 0;
1445 goto http_msg_rqline_eol;
1446 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1447 state = HTTP_MSG_ERROR;
1448 break;
1449
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1450 case HTTP_MSG_RQMETH_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1451 http_msg_rqmeth_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1452 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1453 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1454 goto http_msg_rquri;
1455 }
1456 if (likely(HTTP_IS_SPHT(*ptr)))
1457 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1458 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1459 goto http_msg_req09_uri;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1460
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1461 case HTTP_MSG_RQURI:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1462 http_msg_rquri:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1463 if (likely(!HTTP_IS_LWS(*ptr)))
1464 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1465
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1466 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1467 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1468 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1469 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1470
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1471 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1472 goto http_msg_req09_uri_e;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1473
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1474 case HTTP_MSG_RQURI_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1475 http_msg_rquri_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1476 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1477 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1478 goto http_msg_rqver;
1479 }
1480 if (likely(HTTP_IS_SPHT(*ptr)))
1481 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1482 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1483 goto http_msg_req09_ver;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1484
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1485 case HTTP_MSG_RQVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1486 http_msg_rqver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1487 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1488 EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1489
1490 if (likely(HTTP_IS_CRLF(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1491 msg->sl.rq.v_l = (ptr - msg_buf) - msg->som - msg->sl.rq.v;
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1492 http_msg_rqline_eol:
1493 /* We have seen the end of line. Note that we do not
1494 * necessarily have the \n yet, but at least we know that we
1495 * have EITHER \r OR \n, otherwise the request would not be
1496 * complete. We can then record the request length and return
1497 * to the caller which will be able to register it.
1498 */
1499 msg->sl.rq.l = ptr - msg->sol;
1500 return ptr;
1501 }
1502
1503 /* neither an HTTP_VER token nor a CRLF */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1504 state = HTTP_MSG_ERROR;
1505 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1506
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1507#ifdef DEBUG_FULL
1508 default:
1509 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1510 exit(1);
1511#endif
1512 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1513
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1514 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1515 /* out of valid data */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1516 if (ret_state)
1517 *ret_state = state;
1518 if (ret_ptr)
1519 *ret_ptr = (char *)ptr;
1520 return NULL;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1521}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1522
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1523/*
1524 * Returns the data from Authorization header. Function may be called more
1525 * than once so data is stored in txn->auth_data. When no header is found
1526 * or auth method is unknown auth_method is set to HTTP_AUTH_WRONG to avoid
1527 * searching again for something we are unable to find anyway.
1528 */
1529
1530char get_http_auth_buff[BUFSIZE];
1531
1532int
1533get_http_auth(struct session *s)
1534{
1535
1536 struct http_txn *txn = &s->txn;
1537 struct chunk auth_method;
1538 struct hdr_ctx ctx;
1539 char *h, *p;
1540 int len;
1541
1542#ifdef DEBUG_AUTH
1543 printf("Auth for session %p: %d\n", s, txn->auth.method);
1544#endif
1545
1546 if (txn->auth.method == HTTP_AUTH_WRONG)
1547 return 0;
1548
1549 if (txn->auth.method)
1550 return 1;
1551
1552 txn->auth.method = HTTP_AUTH_WRONG;
1553
1554 ctx.idx = 0;
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]1555
1556 if (txn->flags & TX_USE_PX_CONN) {
1557 h = "Proxy-Authorization";
1558 len = strlen(h);
1559 } else {
1560 h = "Authorization";
1561 len = strlen(h);
1562 }
1563
1564 if (!http_find_header2(h, len, txn->req.sol, &txn->hdr_idx, &ctx))
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1565 return 0;
1566
1567 h = ctx.line + ctx.val;
1568
1569 p = memchr(h, ' ', ctx.vlen);
1570 if (!p || p == h)
1571 return 0;
1572
1573 chunk_initlen(&auth_method, h, 0, p-h);
1574 chunk_initlen(&txn->auth.method_data, p+1, 0, ctx.vlen-(p-h)-1);
1575
1576 if (!strncasecmp("Basic", auth_method.str, auth_method.len)) {
1577
1578 len = base64dec(txn->auth.method_data.str, txn->auth.method_data.len,
1579 get_http_auth_buff, BUFSIZE - 1);
1580
1581 if (len < 0)
1582 return 0;
1583
1584
1585 get_http_auth_buff[len] = '\0';
1586
1587 p = strchr(get_http_auth_buff, ':');
1588
1589 if (!p)
1590 return 0;
1591
1592 txn->auth.user = get_http_auth_buff;
1593 *p = '\0';
1594 txn->auth.pass = p+1;
1595
1596 txn->auth.method = HTTP_AUTH_BASIC;
1597 return 1;
1598 }
1599
1600 return 0;
1601}
1602
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1603
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1604/*
1605 * This function parses an HTTP message, either a request or a response,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1606 * depending on the initial msg->msg_state. It can be preempted everywhere
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1607 * when data are missing and recalled at the exact same location with no
1608 * information loss. The header index is re-initialized when switching from
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1609 * 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]1610 * fields. Note that msg->som and msg->sol will be initialized after completing
1611 * the first state, so that none of the msg pointers has to be initialized
1612 * prior to the first call.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1613 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1614void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx)
1615{
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1616 unsigned int state; /* updated only when leaving the FSM */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1617 register char *ptr, *end; /* request pointers, to avoid dereferences */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1618
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1619 state = msg->msg_state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1620 ptr = buf->lr;
1621 end = buf->r;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1622
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1623 if (unlikely(ptr >= end))
1624 goto http_msg_ood;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1625
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1626 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1627 /*
1628 * First, states that are specific to the response only.
1629 * We check them first so that request and headers are
1630 * closer to each other (accessed more often).
1631 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1632 case HTTP_MSG_RPBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1633 http_msg_rpbefore:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1634 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1635 /* we have a start of message, but we have to check
1636 * first if we need to remove some CRLF. We can only
1637 * do this when send_max=0.
1638 */
1639 char *beg = buf->w + buf->send_max;
1640 if (beg >= buf->data + buf->size)
1641 beg -= buf->size;
1642 if (unlikely(ptr != beg)) {
1643 if (buf->send_max)
1644 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1645 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1646 buffer_ignore(buf, ptr - beg);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1647 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1648 msg->som = ptr - buf->data;
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1649 msg->sol = ptr;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1650 hdr_idx_init(idx);
1651 state = HTTP_MSG_RPVER;
1652 goto http_msg_rpver;
1653 }
1654
1655 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1656 goto http_msg_invalid;
1657
1658 if (unlikely(*ptr == '\n'))
1659 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1660 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1661 /* stop here */
1662
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1663 case HTTP_MSG_RPBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1664 http_msg_rpbefore_cr:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1665 EXPECT_LF_HERE(ptr, http_msg_invalid);
1666 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1667 /* stop here */
1668
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1669 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1670 http_msg_rpver:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1671 case HTTP_MSG_RPVER_SP:
1672 case HTTP_MSG_RPCODE:
1673 case HTTP_MSG_RPCODE_SP:
1674 case HTTP_MSG_RPREASON:
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1675 ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1676 &buf->lr, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1677 if (unlikely(!ptr))
1678 return;
1679
1680 /* we have a full response and we know that we have either a CR
1681 * or an LF at <ptr>.
1682 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1683 //fprintf(stderr,"som=%d rq.l=%d *ptr=0x%02x\n", msg->som, msg->sl.st.l, *ptr);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1684 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1685
1686 msg->sol = ptr;
1687 if (likely(*ptr == '\r'))
1688 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1689 goto http_msg_rpline_end;
1690
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1691 case HTTP_MSG_RPLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1692 http_msg_rpline_end:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1693 /* msg->sol must point to the first of CR or LF. */
1694 EXPECT_LF_HERE(ptr, http_msg_invalid);
1695 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1696 /* stop here */
1697
1698 /*
1699 * Second, states that are specific to the request only
1700 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1701 case HTTP_MSG_RQBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1702 http_msg_rqbefore:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1703 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1704 /* we have a start of message, but we have to check
1705 * first if we need to remove some CRLF. We can only
1706 * do this when send_max=0.
1707 */
1708 char *beg = buf->w + buf->send_max;
1709 if (beg >= buf->data + buf->size)
1710 beg -= buf->size;
1711 if (likely(ptr != beg)) {
1712 if (buf->send_max)
1713 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1714 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1715 buffer_ignore(buf, ptr - beg);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1716 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1717 msg->som = ptr - buf->data;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1718 msg->sol = ptr;
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1719 /* we will need this when keep-alive will be supported
1720 hdr_idx_init(idx);
1721 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1722 state = HTTP_MSG_RQMETH;
1723 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1724 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1725
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1726 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1727 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1728
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1729 if (unlikely(*ptr == '\n'))
1730 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1731 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1732 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1733
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1734 case HTTP_MSG_RQBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1735 http_msg_rqbefore_cr:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1736 EXPECT_LF_HERE(ptr, http_msg_invalid);
1737 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1738 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1739
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1740 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1741 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1742 case HTTP_MSG_RQMETH_SP:
1743 case HTTP_MSG_RQURI:
1744 case HTTP_MSG_RQURI_SP:
1745 case HTTP_MSG_RQVER:
1746 ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1747 &buf->lr, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1748 if (unlikely(!ptr))
1749 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1750
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1751 /* we have a full request and we know that we have either a CR
1752 * or an LF at <ptr>.
1753 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1754 //fprintf(stderr,"som=%d rq.l=%d *ptr=0x%02x\n", msg->som, msg->sl.rq.l, *ptr);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1755 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1756
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1757 msg->sol = ptr;
1758 if (likely(*ptr == '\r'))
1759 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1760 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1761
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1762 case HTTP_MSG_RQLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1763 http_msg_rqline_end:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1764 /* check for HTTP/0.9 request : no version information available.
1765 * msg->sol must point to the first of CR or LF.
1766 */
1767 if (unlikely(msg->sl.rq.v_l == 0))
1768 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1769
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1770 EXPECT_LF_HERE(ptr, http_msg_invalid);
1771 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1772 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1773
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1774 /*
1775 * Common states below
1776 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1777 case HTTP_MSG_HDR_FIRST:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1778 http_msg_hdr_first:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1779 msg->sol = ptr;
1780 if (likely(!HTTP_IS_CRLF(*ptr))) {
1781 goto http_msg_hdr_name;
1782 }
1783
1784 if (likely(*ptr == '\r'))
1785 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1786 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1787
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1788 case HTTP_MSG_HDR_NAME:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1789 http_msg_hdr_name:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1790 /* assumes msg->sol points to the first char */
1791 if (likely(HTTP_IS_TOKEN(*ptr)))
1792 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1793
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1794 if (likely(*ptr == ':')) {
1795 msg->col = ptr - buf->data;
1796 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
1797 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1798
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1799 if (likely(msg->err_pos < -1) || *ptr == '\n')
1800 goto http_msg_invalid;
1801
1802 if (msg->err_pos == -1) /* capture error pointer */
1803 msg->err_pos = ptr - buf->data; /* >= 0 now */
1804
1805 /* and we still accept this non-token character */
1806 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1807
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1808 case HTTP_MSG_HDR_L1_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1809 http_msg_hdr_l1_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1810 /* assumes msg->sol points to the first char and msg->col to the colon */
1811 if (likely(HTTP_IS_SPHT(*ptr)))
1812 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]1813
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1814 /* header value can be basically anything except CR/LF */
1815 msg->sov = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1816
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1817 if (likely(!HTTP_IS_CRLF(*ptr))) {
1818 goto http_msg_hdr_val;
1819 }
1820
1821 if (likely(*ptr == '\r'))
1822 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1823 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1824
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1825 case HTTP_MSG_HDR_L1_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1826 http_msg_hdr_l1_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1827 EXPECT_LF_HERE(ptr, http_msg_invalid);
1828 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]1829
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1830 case HTTP_MSG_HDR_L1_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1831 http_msg_hdr_l1_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1832 if (likely(HTTP_IS_SPHT(*ptr))) {
1833 /* replace HT,CR,LF with spaces */
1834 for (; buf->data+msg->sov < ptr; msg->sov++)
1835 buf->data[msg->sov] = ' ';
1836 goto http_msg_hdr_l1_sp;
1837 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1838 /* we had a header consisting only in spaces ! */
1839 msg->eol = buf->data + msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1840 goto http_msg_complete_header;
1841
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1842 case HTTP_MSG_HDR_VAL:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1843 http_msg_hdr_val:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1844 /* assumes msg->sol points to the first char, msg->col to the
1845 * colon, and msg->sov points to the first character of the
1846 * value.
1847 */
1848 if (likely(!HTTP_IS_CRLF(*ptr)))
1849 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1850
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1851 msg->eol = ptr;
1852 /* Note: we could also copy eol into ->eoh so that we have the
1853 * real header end in case it ends with lots of LWS, but is this
1854 * really needed ?
1855 */
1856 if (likely(*ptr == '\r'))
1857 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1858 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1859
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1860 case HTTP_MSG_HDR_L2_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1861 http_msg_hdr_l2_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1862 EXPECT_LF_HERE(ptr, http_msg_invalid);
1863 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]1864
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1865 case HTTP_MSG_HDR_L2_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1866 http_msg_hdr_l2_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1867 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1868 /* LWS: replace HT,CR,LF with spaces */
1869 for (; msg->eol < ptr; msg->eol++)
1870 *msg->eol = ' ';
1871 goto http_msg_hdr_val;
1872 }
1873 http_msg_complete_header:
1874 /*
1875 * It was a new header, so the last one is finished.
1876 * Assumes msg->sol points to the first char, msg->col to the
1877 * colon, msg->sov points to the first character of the value
1878 * and msg->eol to the first CR or LF so we know how the line
1879 * ends. We insert last header into the index.
1880 */
1881 /*
1882 fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
1883 write(2, msg->sol, msg->eol-msg->sol);
1884 fprintf(stderr,"\n");
1885 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1886
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1887 if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
1888 idx, idx->tail) < 0))
1889 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1890
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1891 msg->sol = ptr;
1892 if (likely(!HTTP_IS_CRLF(*ptr))) {
1893 goto http_msg_hdr_name;
1894 }
1895
1896 if (likely(*ptr == '\r'))
1897 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1898 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1899
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1900 case HTTP_MSG_LAST_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1901 http_msg_last_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1902 /* Assumes msg->sol points to the first of either CR or LF */
1903 EXPECT_LF_HERE(ptr, http_msg_invalid);
1904 ptr++;
1905 buf->lr = ptr;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1906 msg->col = msg->sov = buf->lr - buf->data;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1907 msg->eoh = msg->sol - buf->data;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1908 msg->sol = buf->data + msg->som;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1909 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1910 return;
1911#ifdef DEBUG_FULL
1912 default:
1913 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1914 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1915#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1916 }
1917 http_msg_ood:
1918 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1919 msg->msg_state = state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1920 buf->lr = ptr;
1921 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1922
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1923 http_msg_invalid:
1924 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1925 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1926 buf->lr = ptr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1927 return;
1928}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1929
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1930/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1931 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1932 * nothing is done and 1 is returned.
1933 */
1934static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
1935{
1936 int delta;
1937 char *cur_end;
1938
1939 if (msg->sl.rq.v_l != 0)
1940 return 1;
1941
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1942 cur_end = msg->sol + msg->sl.rq.l;
1943 delta = 0;
1944
1945 if (msg->sl.rq.u_l == 0) {
1946 /* if no URI was set, add "/" */
1947 delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
1948 cur_end += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1949 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1950 }
1951 /* add HTTP version */
1952 delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1953 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1954 cur_end += delta;
1955 cur_end = (char *)http_parse_reqline(msg, req->data,
1956 HTTP_MSG_RQMETH,
1957 msg->sol, cur_end + 1,
1958 NULL, NULL);
1959 if (unlikely(!cur_end))
1960 return 0;
1961
1962 /* we have a full HTTP/1.0 request now and we know that
1963 * we have either a CR or an LF at <ptr>.
1964 */
1965 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1966 return 1;
1967}
1968
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1969/* Parse the Connection: header of an HTTP request, looking for both "close"
1970 * and "keep-alive" values. If a buffer is provided and we already know that
1971 * some headers may safely be removed, we remove them now. The <to_del> flags
1972 * are used for that :
1973 * - bit 0 means remove "close" headers (in HTTP/1.0 requests/responses)
1974 * - bit 1 means remove "keep-alive" headers (in HTTP/1.1 reqs/resp to 1.1).
1975 * The TX_HDR_CONN_* flags are adjusted in txn->flags depending on what was
1976 * found, and TX_CON_*_SET is adjusted depending on what is left so only
1977 * harmless combinations may be removed. Do not call that after changes have
1978 * been processed. If unused, the buffer can be NULL, and no data will be
1979 * changed.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1980 */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1981void http_parse_connection_header(struct http_txn *txn, struct http_msg *msg, struct buffer *buf, int to_del)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1982{
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1983 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1984 const char *hdr_val = "Connection";
1985 int hdr_len = 10;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1986
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1987 if (txn->flags & TX_HDR_CONN_PRS)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1988 return;
1989
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1990 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1991 hdr_val = "Proxy-Connection";
1992 hdr_len = 16;
1993 }
1994
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1995 ctx.idx = 0;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1996 txn->flags &= ~(TX_CON_KAL_SET|TX_CON_CLO_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1997 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1998 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
1999 txn->flags |= TX_HDR_CONN_KAL;
2000 if ((to_del & 2) && buf)
2001 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
2002 else
2003 txn->flags |= TX_CON_KAL_SET;
2004 }
2005 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
2006 txn->flags |= TX_HDR_CONN_CLO;
2007 if ((to_del & 1) && buf)
2008 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
2009 else
2010 txn->flags |= TX_CON_CLO_SET;
2011 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2012 }
2013
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2014 txn->flags |= TX_HDR_CONN_PRS;
2015 return;
2016}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2017
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2018/* Apply desired changes on the Connection: header. Values may be removed and/or
2019 * added depending on the <wanted> flags, which are exclusively composed of
2020 * TX_CON_CLO_SET and TX_CON_KAL_SET, depending on what flags are desired. The
2021 * TX_CON_*_SET flags are adjusted in txn->flags depending on what is left.
2022 */
2023void http_change_connection_header(struct http_txn *txn, struct http_msg *msg, struct buffer *buf, int wanted)
2024{
2025 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2026 const char *hdr_val = "Connection";
2027 int hdr_len = 10;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2028
2029 ctx.idx = 0;
2030
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2031
2032 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2033 hdr_val = "Proxy-Connection";
2034 hdr_len = 16;
2035 }
2036
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2037 txn->flags &= ~(TX_CON_CLO_SET | TX_CON_KAL_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2038 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2039 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
2040 if (wanted & TX_CON_KAL_SET)
2041 txn->flags |= TX_CON_KAL_SET;
2042 else
2043 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2044 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2045 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
2046 if (wanted & TX_CON_CLO_SET)
2047 txn->flags |= TX_CON_CLO_SET;
2048 else
2049 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2050 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2051 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2052
2053 if (wanted == (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
2054 return;
2055
2056 if ((wanted & TX_CON_CLO_SET) && !(txn->flags & TX_CON_CLO_SET)) {
2057 txn->flags |= TX_CON_CLO_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2058 hdr_val = "Connection: close";
2059 hdr_len = 17;
2060 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2061 hdr_val = "Proxy-Connection: close";
2062 hdr_len = 23;
2063 }
2064 http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2065 }
2066
2067 if ((wanted & TX_CON_KAL_SET) && !(txn->flags & TX_CON_KAL_SET)) {
2068 txn->flags |= TX_CON_KAL_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2069 hdr_val = "Connection: keep-alive";
2070 hdr_len = 22;
2071 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2072 hdr_val = "Proxy-Connection: keep-alive";
2073 hdr_len = 28;
2074 }
2075 http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2076 }
2077 return;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2078}
2079
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2080/* Parse the chunk size at buf->lr. Once done, it adjusts ->lr to point to the
2081 * first byte of body, and increments msg->sov by the number of bytes parsed,
2082 * so that we know we can forward between ->som and ->sov. Note that due to
2083 * possible wrapping at the end of the buffer, it is possible that msg->sov is
2084 * lower than msg->som.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2085 * Return >0 on success, 0 when some data is missing, <0 on error.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2086 * 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]2087 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2088int http_parse_chunk_size(struct buffer *buf, struct http_msg *msg)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2089{
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2090 char *ptr = buf->lr;
2091 char *end = buf->data + buf->size;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2092 unsigned int chunk = 0;
2093
2094 /* The chunk size is in the following form, though we are only
2095 * interested in the size and CRLF :
2096 * 1*HEXDIGIT *WSP *[ ';' extensions ] CRLF
2097 */
2098 while (1) {
2099 int c;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2100 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2101 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2102 c = hex2i(*ptr);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2103 if (c < 0) /* not a hex digit anymore */
2104 break;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2105 if (++ptr >= end)
2106 ptr = buf->data;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2107 if (chunk & 0xF000000) /* overflow will occur */
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2108 goto error;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2109 chunk = (chunk << 4) + c;
2110 }
2111
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2112 /* empty size not allowed */
2113 if (ptr == buf->lr)
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2114 goto error;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2115
2116 while (http_is_spht[(unsigned char)*ptr]) {
2117 if (++ptr >= end)
2118 ptr = buf->data;
2119 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2120 return 0;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2121 }
2122
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2123 /* Up to there, we know that at least one byte is present at *ptr. Check
2124 * for the end of chunk size.
2125 */
2126 while (1) {
2127 if (likely(HTTP_IS_CRLF(*ptr))) {
2128 /* we now have a CR or an LF at ptr */
2129 if (likely(*ptr == '\r')) {
2130 if (++ptr >= end)
2131 ptr = buf->data;
2132 if (ptr == buf->r)
2133 return 0;
2134 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2135
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2136 if (*ptr != '\n')
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2137 goto error;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2138 if (++ptr >= end)
2139 ptr = buf->data;
2140 /* done */
2141 break;
2142 }
2143 else if (*ptr == ';') {
2144 /* chunk extension, ends at next CRLF */
2145 if (++ptr >= end)
2146 ptr = buf->data;
2147 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2148 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2149
2150 while (!HTTP_IS_CRLF(*ptr)) {
2151 if (++ptr >= end)
2152 ptr = buf->data;
2153 if (ptr == buf->r)
2154 return 0;
2155 }
2156 /* we have a CRLF now, loop above */
2157 continue;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2158 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2159 else
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2160 goto error;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2161 }
2162
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2163 /* OK we found our CRLF and now <ptr> points to the next byte,
2164 * which may or may not be present. We save that into ->lr and
2165 * ->sov.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2166 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2167 msg->sov += ptr - buf->lr;
2168 buf->lr = ptr;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2169 msg->chunk_len = chunk;
2170 msg->body_len += chunk;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2171 msg->msg_state = chunk ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2172 return 1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2173 error:
2174 msg->err_pos = ptr - buf->data;
2175 return -1;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2176}
2177
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2178/* This function skips trailers in the buffer <buf> associated with HTTP
2179 * message <msg>. The first visited position is buf->lr. If the end of
2180 * the trailers is found, it is automatically scheduled to be forwarded,
2181 * msg->msg_state switches to HTTP_MSG_DONE, and the function returns >0.
2182 * If not enough data are available, the function does not change anything
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2183 * except maybe buf->lr and msg->sov if it could parse some lines, and returns
2184 * zero. If a parse error is encountered, the function returns < 0 and does not
2185 * change anything except maybe buf->lr and msg->sov. Note that the message
2186 * must already be in HTTP_MSG_TRAILERS state before calling this function,
2187 * which implies that all non-trailers data have already been scheduled for
2188 * forwarding, and that the difference between msg->som and msg->sov exactly
2189 * matches the length of trailers already parsed and not forwarded. It is also
2190 * important to note that this function is designed to be able to parse wrapped
2191 * headers at end of buffer.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2192 */
2193int http_forward_trailers(struct buffer *buf, struct http_msg *msg)
2194{
2195 /* we have buf->lr which points to next line. Look for CRLF. */
2196 while (1) {
2197 char *p1 = NULL, *p2 = NULL;
2198 char *ptr = buf->lr;
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2199 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2200
2201 /* scan current line and stop at LF or CRLF */
2202 while (1) {
2203 if (ptr == buf->r)
2204 return 0;
2205
2206 if (*ptr == '\n') {
2207 if (!p1)
2208 p1 = ptr;
2209 p2 = ptr;
2210 break;
2211 }
2212
2213 if (*ptr == '\r') {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2214 if (p1) {
2215 msg->err_pos = ptr - buf->data;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2216 return -1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2217 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2218 p1 = ptr;
2219 }
2220
2221 ptr++;
2222 if (ptr >= buf->data + buf->size)
2223 ptr = buf->data;
2224 }
2225
2226 /* after LF; point to beginning of next line */
2227 p2++;
2228 if (p2 >= buf->data + buf->size)
2229 p2 = buf->data;
2230
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2231 bytes = p2 - buf->lr;
2232 if (bytes < 0)
2233 bytes += buf->size;
2234
2235 /* schedule this line for forwarding */
2236 msg->sov += bytes;
2237 if (msg->sov >= buf->size)
2238 msg->sov -= buf->size;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2239
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2240 if (p1 == buf->lr) {
2241 /* LF/CRLF at beginning of line => end of trailers at p2.
2242 * Everything was scheduled for forwarding, there's nothing
2243 * left from this message.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]2244 */
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2245 buf->lr = p2;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2246 msg->msg_state = HTTP_MSG_DONE;
2247 return 1;
2248 }
2249 /* OK, next line then */
2250 buf->lr = p2;
2251 }
2252}
2253
2254/* This function may be called only in HTTP_MSG_DATA_CRLF. It reads the CRLF or
2255 * a possible LF alone at the end of a chunk. It automatically adjusts msg->sov,
2256 * ->som, buf->lr in order to include this part into the next forwarding phase.
2257 * It also sets msg_state to HTTP_MSG_CHUNK_SIZE and returns >0 on success. If
2258 * not enough data are available, the function does not change anything and
2259 * returns zero. If a parse error is encountered, the function returns < 0 and
2260 * does not change anything. Note: this function is designed to parse wrapped
2261 * CRLF at the end of the buffer.
2262 */
2263int http_skip_chunk_crlf(struct buffer *buf, struct http_msg *msg)
2264{
2265 char *ptr;
2266 int bytes;
2267
2268 /* NB: we'll check data availabilty at the end. It's not a
2269 * problem because whatever we match first will be checked
2270 * against the correct length.
2271 */
2272 bytes = 1;
2273 ptr = buf->lr;
2274 if (*ptr == '\r') {
2275 bytes++;
2276 ptr++;
2277 if (ptr >= buf->data + buf->size)
2278 ptr = buf->data;
2279 }
2280
Willy Tarreaubf3f1de2010-03-17 15:54:24 +0100[diff] [blame]2281 if (bytes > buf->l - buf->send_max)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2282 return 0;
2283
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2284 if (*ptr != '\n') {
2285 msg->err_pos = ptr - buf->data;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2286 return -1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2287 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2288
2289 ptr++;
2290 if (ptr >= buf->data + buf->size)
2291 ptr = buf->data;
2292 buf->lr = ptr;
2293 /* prepare the CRLF to be forwarded. msg->som may be before data but we don't care */
2294 msg->sov = ptr - buf->data;
2295 msg->som = msg->sov - bytes;
2296 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
2297 return 1;
2298}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2299
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2300void http_buffer_heavy_realign(struct buffer *buf, struct http_msg *msg)
2301{
2302 char *end = buf->data + buf->size;
2303 int off = buf->data + buf->size - buf->w;
2304
2305 /* two possible cases :
2306 * - the buffer is in one contiguous block, we move it in-place
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2307 * - the buffer is in two blocks, we move it via the swap_buffer
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2308 */
2309 if (buf->l) {
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2310 int block1 = buf->l;
2311 int block2 = 0;
2312 if (buf->r <= buf->w) {
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2313 /* non-contiguous block */
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2314 block1 = buf->data + buf->size - buf->w;
2315 block2 = buf->r - buf->data;
2316 }
2317 if (block2)
2318 memcpy(swap_buffer, buf->data, block2);
2319 memmove(buf->data, buf->w, block1);
2320 if (block2)
2321 memcpy(buf->data + block1, swap_buffer, block2);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2322 }
2323
2324 /* adjust all known pointers */
2325 buf->w = buf->data;
2326 buf->lr += off; if (buf->lr >= end) buf->lr -= buf->size;
2327 buf->r += off; if (buf->r >= end) buf->r -= buf->size;
2328 msg->sol += off; if (msg->sol >= end) msg->sol -= buf->size;
2329 msg->eol += off; if (msg->eol >= end) msg->eol -= buf->size;
2330
2331 /* adjust relative pointers */
2332 msg->som = 0;
2333 msg->eoh += off; if (msg->eoh >= buf->size) msg->eoh -= buf->size;
2334 msg->col += off; if (msg->col >= buf->size) msg->col -= buf->size;
2335 msg->sov += off; if (msg->sov >= buf->size) msg->sov -= buf->size;
2336
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2337 if (msg->err_pos >= 0) {
2338 msg->err_pos += off;
2339 if (msg->err_pos >= buf->size)
2340 msg->err_pos -= buf->size;
2341 }
2342
2343 buf->flags &= ~BF_FULL;
2344 if (buf->l >= buffer_max_len(buf))
2345 buf->flags |= BF_FULL;
2346}
2347
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2348/* This stream analyser waits for a complete HTTP request. It returns 1 if the
2349 * processing can continue on next analysers, or zero if it either needs more
2350 * data or wants to immediately abort the request (eg: timeout, error, ...). It
2351 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
2352 * when it has nothing left to do, and may remove any analyser when it wants to
2353 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2354 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2355int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2356{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2357 /*
2358 * We will parse the partial (or complete) lines.
2359 * We will check the request syntax, and also join multi-line
2360 * headers. An index of all the lines will be elaborated while
2361 * parsing.
2362 *
2363 * For the parsing, we use a 28 states FSM.
2364 *
2365 * Here is the information we currently have :
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2366 * req->data + msg->som = beginning of request
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2367 * req->data + msg->eoh = end of processed headers / start of current one
2368 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2369 * req->lr = first non-visited byte
2370 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2371 *
2372 * At end of parsing, we may perform a capture of the error (if any), and
2373 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
2374 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
2375 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2376 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2377
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2378 int cur_idx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2379 int use_close_only;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2380 struct http_txn *txn = &s->txn;
2381 struct http_msg *msg = &txn->req;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2382 struct hdr_ctx ctx;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2383
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]2384 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2385 now_ms, __FUNCTION__,
2386 s,
2387 req,
2388 req->rex, req->wex,
2389 req->flags,
2390 req->l,
2391 req->analysers);
2392
Willy Tarreau52a0c602009-08-16 22:45:38 +0200[diff] [blame]2393 /* we're speaking HTTP here, so let's speak HTTP to the client */
2394 s->srv_error = http_return_srv_error;
2395
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2396 /* There's a protected area at the end of the buffer for rewriting
2397 * purposes. We don't want to start to parse the request if the
2398 * protected area is affected, because we may have to move processed
2399 * data later, which is much more complicated.
2400 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2401 if (req->l && msg->msg_state < HTTP_MSG_ERROR) {
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2402 if ((txn->flags & TX_NOT_FIRST) &&
2403 unlikely((req->flags & BF_FULL) ||
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2404 req->r < req->lr ||
2405 req->r > req->data + req->size - global.tune.maxrewrite)) {
2406 if (req->send_max) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2407 if (req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2408 goto failed_keep_alive;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2409 /* some data has still not left the buffer, wake us once that's done */
2410 buffer_dont_connect(req);
2411 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
2412 return 0;
2413 }
Willy Tarreau0499e352010-12-17 07:13:42 +0100[diff] [blame]2414 if (req->r < req->lr || req->r > req->data + req->size - global.tune.maxrewrite)
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2415 http_buffer_heavy_realign(req, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2416 }
2417
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2418 /* Note that we have the same problem with the response ; we
2419 * may want to send a redirect, error or anything which requires
2420 * some spare space. So we'll ensure that we have at least
2421 * maxrewrite bytes available in the response buffer before
2422 * processing that one. This will only affect pipelined
2423 * keep-alive requests.
2424 */
2425 if ((txn->flags & TX_NOT_FIRST) &&
2426 unlikely((s->rep->flags & BF_FULL) ||
2427 s->rep->r < s->rep->lr ||
2428 s->rep->r > s->rep->data + s->rep->size - global.tune.maxrewrite)) {
2429 if (s->rep->send_max) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2430 if (s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2431 goto failed_keep_alive;
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2432 /* don't let a connection request be initiated */
2433 buffer_dont_connect(req);
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2434 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau0499e352010-12-17 07:13:42 +0100[diff] [blame]2435 s->rep->analysers |= an_bit; /* wake us up once it changes */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2436 return 0;
2437 }
2438 }
2439
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2440 if (likely(req->lr < req->r))
2441 http_msg_analyzer(req, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2442 }
2443
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2444 /* 1: we might have to print this header in debug mode */
2445 if (unlikely((global.mode & MODE_DEBUG) &&
2446 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]2447 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2448 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2449 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2450
Willy Tarreau663308b2010-06-07 14:06:08 +0200[diff] [blame]2451 sol = req->data + msg->som;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2452 eol = sol + msg->sl.rq.l;
2453 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2454
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2455 sol += hdr_idx_first_pos(&txn->hdr_idx);
2456 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2457
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2458 while (cur_idx) {
2459 eol = sol + txn->hdr_idx.v[cur_idx].len;
2460 debug_hdr("clihdr", s, sol, eol);
2461 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2462 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2463 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2464 }
2465
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2466
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2467 /*
2468 * Now we quickly check if we have found a full valid request.
2469 * If not so, we check the FD and buffer states before leaving.
2470 * A full request is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2471 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2472 * requests are checked first. When waiting for a second request
2473 * on a keep-alive session, if we encounter and error, close, t/o,
2474 * we note the error in the session flags but don't set any state.
2475 * Since the error will be noted there, it will not be counted by
2476 * process_session() as a frontend error.
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2477 * Last, we may increase some tracked counters' http request errors on
2478 * the cases that are deliberately the client's fault. For instance,
2479 * a timeout or connection reset is not counted as an error. However
2480 * a bad request is.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2481 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2482
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2483 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2484 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2485 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2486 */
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2487 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2488 session_inc_http_req_ctr(s);
2489 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2490 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2491 goto return_bad_req;
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2492 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2493
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2494 /* 1: Since we are in header mode, if there's no space
2495 * left for headers, we won't be able to free more
2496 * later, so the session will never terminate. We
2497 * must terminate it now.
2498 */
2499 if (unlikely(req->flags & BF_FULL)) {
2500 /* FIXME: check if URI is set and return Status
2501 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2502 */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2503 session_inc_http_req_ctr(s);
2504 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2505 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2506 goto return_bad_req;
2507 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2508
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2509 /* 2: have we encountered a read error ? */
2510 else if (req->flags & BF_READ_ERROR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2511 if (!(s->flags & SN_ERR_MASK))
2512 s->flags |= SN_ERR_CLICL;
2513
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2514 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2515 goto failed_keep_alive;
2516
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2517 /* we cannot return any message on error */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2518 if (msg->err_pos >= 0) {
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2519 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2520 session_inc_http_err_ctr(s);
2521 }
2522
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2523 msg->msg_state = HTTP_MSG_ERROR;
2524 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2525
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2526 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2527 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2528 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2529 if (s->listener->counters)
2530 s->listener->counters->failed_req++;
2531
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2532 if (!(s->flags & SN_FINST_MASK))
2533 s->flags |= SN_FINST_R;
2534 return 0;
2535 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2536
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2537 /* 3: has the read timeout expired ? */
2538 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]2539 if (!(s->flags & SN_ERR_MASK))
2540 s->flags |= SN_ERR_CLITO;
2541
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2542 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2543 goto failed_keep_alive;
2544
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2545 /* read timeout : give up with an error message. */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2546 if (msg->err_pos >= 0) {
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2547 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2548 session_inc_http_err_ctr(s);
2549 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2550 txn->status = 408;
2551 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
2552 msg->msg_state = HTTP_MSG_ERROR;
2553 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2554
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2555 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2556 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2557 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2558 if (s->listener->counters)
2559 s->listener->counters->failed_req++;
2560
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2561 if (!(s->flags & SN_FINST_MASK))
2562 s->flags |= SN_FINST_R;
2563 return 0;
2564 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2565
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2566 /* 4: have we encountered a close ? */
2567 else if (req->flags & BF_SHUTR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2568 if (!(s->flags & SN_ERR_MASK))
2569 s->flags |= SN_ERR_CLICL;
2570
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2571 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2572 goto failed_keep_alive;
2573
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2574 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2575 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2576 txn->status = 400;
2577 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2578 msg->msg_state = HTTP_MSG_ERROR;
2579 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2580
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2581 session_inc_http_err_ctr(s);
2582 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2583 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2584 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2585 if (s->listener->counters)
2586 s->listener->counters->failed_req++;
2587
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2588 if (!(s->flags & SN_FINST_MASK))
2589 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2590 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2591 }
2592
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2593 buffer_dont_connect(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2594 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2595 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2596
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2597 if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) {
2598 /* If the client starts to talk, let's fall back to
2599 * request timeout processing.
2600 */
2601 txn->flags &= ~TX_WAIT_NEXT_RQ;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2602 req->analyse_exp = TICK_ETERNITY;
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2603 }
2604
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2605 /* just set the request timeout once at the beginning of the request */
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2606 if (!tick_isset(req->analyse_exp)) {
2607 if ((msg->msg_state == HTTP_MSG_RQBEFORE) &&
2608 (txn->flags & TX_WAIT_NEXT_RQ) &&
2609 tick_isset(s->be->timeout.httpka))
2610 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
2611 else
2612 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
2613 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2614
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2615 /* we're not ready yet */
2616 return 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2617
2618 failed_keep_alive:
2619 /* Here we process low-level errors for keep-alive requests. In
2620 * short, if the request is not the first one and it experiences
2621 * a timeout, read error or shutdown, we just silently close so
2622 * that the client can try again.
2623 */
2624 txn->status = 0;
2625 msg->msg_state = HTTP_MSG_RQBEFORE;
2626 req->analysers = 0;
2627 s->logs.logwait = 0;
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2628 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]2629 stream_int_retnclose(req->prod, NULL);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2630 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2631 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2632
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2633 /* OK now we have a complete HTTP request with indexed headers. Let's
2634 * complete the request parsing by setting a few fields we will need
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]2635 * later. At this point, we have the last CRLF at req->data + msg->eoh.
2636 * If the request is in HTTP/0.9 form, the rule is still true, and eoh
2637 * points to the CRLF of the request line. req->lr points to the first
2638 * byte after the last LF. msg->col and msg->sov point to the first
2639 * byte of data. msg->eol cannot be trusted because it may have been
2640 * left uninitialized (for instance in the absence of headers).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2641 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]2642
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2643 session_inc_http_req_ctr(s);
Willy Tarreaud9b587f2010-02-26 10:05:55 +0100[diff] [blame]2644 proxy_inc_fe_req_ctr(s->fe); /* one more valid request for this FE */
2645
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2646 if (txn->flags & TX_WAIT_NEXT_RQ) {
2647 /* kill the pending keep-alive timeout */
2648 txn->flags &= ~TX_WAIT_NEXT_RQ;
2649 req->analyse_exp = TICK_ETERNITY;
2650 }
2651
2652
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2653 /* Maybe we found in invalid header name while we were configured not
2654 * to block on that, so we have to capture it now.
2655 */
2656 if (unlikely(msg->err_pos >= 0))
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2657 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2658
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2659 /*
2660 * 1: identify the method
2661 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2662 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2663
2664 /* we can make use of server redirect on GET and HEAD */
2665 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
2666 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2667
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2668 /*
2669 * 2: check if the URI matches the monitor_uri.
2670 * We have to do this for every request which gets in, because
2671 * the monitor-uri is defined by the frontend.
2672 */
2673 if (unlikely((s->fe->monitor_uri_len != 0) &&
2674 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2675 !memcmp(msg->sol + msg->sl.rq.u,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2676 s->fe->monitor_uri,
2677 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2678 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2679 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2680 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2681 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2682
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2683 s->flags |= SN_MONITOR;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2684
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2685 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2686 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
2687 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2688
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2689 ret = acl_pass(ret);
2690 if (cond->pol == ACL_COND_UNLESS)
2691 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2692
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2693 if (ret) {
2694 /* we fail this request, let's return 503 service unavail */
2695 txn->status = 503;
2696 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
2697 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2698 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2699 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]2700
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2701 /* nothing to fail, let's reply normaly */
2702 txn->status = 200;
Willy Tarreauae94d4d2011-05-11 16:28:49 +0200[diff] [blame]2703 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_200));
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2704 goto return_prx_cond;
2705 }
2706
2707 /*
2708 * 3: Maybe we have to copy the original REQURI for the logs ?
2709 * Note: we cannot log anymore if the request has been
2710 * classified as invalid.
2711 */
2712 if (unlikely(s->logs.logwait & LW_REQ)) {
2713 /* we have a complete HTTP request that we must log */
2714 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
2715 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2716
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2717 if (urilen >= REQURI_LEN)
2718 urilen = REQURI_LEN - 1;
2719 memcpy(txn->uri, &req->data[msg->som], urilen);
2720 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2721
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2722 if (!(s->logs.logwait &= ~LW_REQ))
2723 s->do_log(s);
2724 } else {
2725 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2726 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2727 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2728
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2729 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]2730 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
2731 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2732
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2733 /* ... and check if the request is HTTP/1.1 or above */
2734 if ((msg->sl.rq.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2735 ((msg->sol[msg->sl.rq.v + 5] > '1') ||
2736 ((msg->sol[msg->sl.rq.v + 5] == '1') &&
2737 (msg->sol[msg->sl.rq.v + 7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2738 txn->flags |= TX_REQ_VER_11;
2739
2740 /* "connection" has not been parsed yet */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2741 txn->flags &= ~(TX_HDR_CONN_PRS | TX_HDR_CONN_CLO | TX_HDR_CONN_KAL);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2742
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2743 /* if the frontend has "option http-use-proxy-header", we'll check if
2744 * we have what looks like a proxied connection instead of a connection,
2745 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
2746 * Note that this is *not* RFC-compliant, however browsers and proxies
2747 * happen to do that despite being non-standard :-(
2748 * We consider that a request not beginning with either '/' or '*' is
2749 * a proxied connection, which covers both "scheme://location" and
2750 * CONNECT ip:port.
2751 */
2752 if ((s->fe->options2 & PR_O2_USE_PXHDR) &&
2753 msg->sol[msg->sl.rq.u] != '/' && msg->sol[msg->sl.rq.u] != '*')
2754 txn->flags |= TX_USE_PX_CONN;
2755
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2756 /* transfer length unknown*/
2757 txn->flags &= ~TX_REQ_XFER_LEN;
2758
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2759 /* 5: we may need to capture headers */
2760 if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2761 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2762 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2763
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2764 /* 6: determine the transfer-length.
2765 * According to RFC2616 #4.4, amended by the HTTPbis working group,
2766 * the presence of a message-body in a REQUEST and its transfer length
2767 * must be determined that way (in order of precedence) :
2768 * 1. The presence of a message-body in a request is signaled by the
2769 * inclusion of a Content-Length or Transfer-Encoding header field
2770 * in the request's header fields. When a request message contains
2771 * both a message-body of non-zero length and a method that does
2772 * not define any semantics for that request message-body, then an
2773 * origin server SHOULD either ignore the message-body or respond
2774 * with an appropriate error message (e.g., 413). A proxy or
2775 * gateway, when presented the same request, SHOULD either forward
2776 * the request inbound with the message- body or ignore the
2777 * message-body when determining a response.
2778 *
2779 * 2. If a Transfer-Encoding header field (Section 9.7) is present
2780 * and the "chunked" transfer-coding (Section 6.2) is used, the
2781 * transfer-length is defined by the use of this transfer-coding.
2782 * If a Transfer-Encoding header field is present and the "chunked"
2783 * transfer-coding is not present, the transfer-length is defined
2784 * by the sender closing the connection.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2785 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2786 * 3. If a Content-Length header field is present, its decimal value in
2787 * OCTETs represents both the entity-length and the transfer-length.
2788 * If a message is received with both a Transfer-Encoding header
2789 * field and a Content-Length header field, the latter MUST be ignored.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2790 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2791 * 4. By the server closing the connection. (Closing the connection
2792 * cannot be used to indicate the end of a request body, since that
2793 * would leave no possibility for the server to send back a response.)
2794 *
2795 * Whenever a transfer-coding is applied to a message-body, the set of
2796 * transfer-codings MUST include "chunked", unless the message indicates
2797 * it is terminated by closing the connection. When the "chunked"
2798 * transfer-coding is used, it MUST be the last transfer-coding applied
2799 * to the message-body.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2800 */
2801
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2802 use_close_only = 0;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2803 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2804 /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]2805 while ((txn->flags & TX_REQ_VER_11) &&
2806 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2807 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
2808 txn->flags |= (TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2809 else if (txn->flags & TX_REQ_TE_CHNK) {
2810 /* bad transfer-encoding (chunked followed by something else) */
2811 use_close_only = 1;
2812 txn->flags &= ~(TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2813 break;
2814 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2815 }
2816
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2817 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2818 while (!(txn->flags & TX_REQ_TE_CHNK) && !use_close_only &&
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2819 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
2820 signed long long cl;
2821
2822 if (!ctx.vlen)
2823 goto return_bad_req;
2824
2825 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
2826 goto return_bad_req; /* parse failure */
2827
2828 if (cl < 0)
2829 goto return_bad_req;
2830
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2831 if ((txn->flags & TX_REQ_CNT_LEN) && (msg->chunk_len != cl))
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2832 goto return_bad_req; /* already specified, was different */
2833
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2834 txn->flags |= TX_REQ_CNT_LEN | TX_REQ_XFER_LEN;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2835 msg->body_len = msg->chunk_len = cl;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2836 }
2837
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2838 /* bodyless requests have a known length */
2839 if (!use_close_only)
2840 txn->flags |= TX_REQ_XFER_LEN;
2841
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2842 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2843 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2844 req->analyse_exp = TICK_ETERNITY;
2845 return 1;
2846
2847 return_bad_req:
2848 /* We centralize bad requests processing here */
2849 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2850 /* we detected a parsing error. We want to archive this request
2851 * in the dedicated proxy area for later troubleshooting.
2852 */
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2853 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe);
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2854 }
2855
2856 txn->req.msg_state = HTTP_MSG_ERROR;
2857 txn->status = 400;
2858 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2859
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2860 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2861 if (s->listener->counters)
2862 s->listener->counters->failed_req++;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2863
2864 return_prx_cond:
2865 if (!(s->flags & SN_ERR_MASK))
2866 s->flags |= SN_ERR_PRXCOND;
2867 if (!(s->flags & SN_FINST_MASK))
2868 s->flags |= SN_FINST_R;
2869
2870 req->analysers = 0;
2871 req->analyse_exp = TICK_ETERNITY;
2872 return 0;
2873}
2874
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2875/* We reached the stats page through a POST request.
2876 * Parse the posted data and enable/disable servers if necessary.
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2877 * Returns 1 if request was parsed or zero if it needs more data.
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2878 */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2879int 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]2880{
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2881 struct proxy *px;
2882 struct server *sv;
2883
2884 char *backend = NULL;
2885 int action = 0;
2886
2887 char *first_param, *cur_param, *next_param, *end_params;
2888
2889 first_param = req->data + txn->req.eoh + 2;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2890 end_params = first_param + txn->req.body_len;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2891
2892 cur_param = next_param = end_params;
2893
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2894 if (end_params >= req->data + req->size - global.tune.maxrewrite) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2895 /* Prevent buffer overflow */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2896 si->applet.ctx.stats.st_code = STAT_STATUS_EXCD;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2897 return 1;
2898 }
2899 else if (end_params > req->data + req->l) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2900 /* we need more data */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2901 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2902 return 0;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2903 }
2904
2905 *end_params = '\0';
2906
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2907 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2908
2909 /*
2910 * Parse the parameters in reverse order to only store the last value.
2911 * From the html form, the backend and the action are at the end.
2912 */
2913 while (cur_param > first_param) {
2914 char *key, *value;
2915
2916 cur_param--;
2917 if ((*cur_param == '&') || (cur_param == first_param)) {
2918 /* Parse the key */
2919 key = cur_param;
2920 if (cur_param != first_param) {
2921 /* delimit the string for the next loop */
2922 *key++ = '\0';
2923 }
2924
2925 /* Parse the value */
2926 value = key;
2927 while (*value != '\0' && *value != '=') {
2928 value++;
2929 }
2930 if (*value == '=') {
2931 /* Ok, a value is found, we can mark the end of the key */
2932 *value++ = '\0';
2933 }
2934
Willy Tarreaubf9c2fc2011-05-31 18:06:18 +0200[diff] [blame]2935 if (!url_decode(key) || !url_decode(value))
2936 break;
2937
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2938 /* Now we can check the key to see what to do */
2939 if (!backend && strcmp(key, "b") == 0) {
2940 backend = value;
2941 }
2942 else if (!action && strcmp(key, "action") == 0) {
2943 if (strcmp(value, "disable") == 0) {
2944 action = 1;
2945 }
2946 else if (strcmp(value, "enable") == 0) {
2947 action = 2;
2948 } else {
2949 /* unknown action, no need to continue */
2950 break;
2951 }
2952 }
2953 else if (strcmp(key, "s") == 0) {
2954 if (backend && action && get_backend_server(backend, value, &px, &sv)) {
2955 switch (action) {
2956 case 1:
Cyril Bonté1e2a1702011-03-03 21:05:17 +0100[diff] [blame]2957 if ((px->state != PR_STSTOPPED) && !(sv->state & SRV_MAINTAIN)) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2958 /* Not already in maintenance, we can change the server state */
2959 sv->state |= SRV_MAINTAIN;
2960 set_server_down(sv);
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2961 si->applet.ctx.stats.st_code = STAT_STATUS_DONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2962 }
2963 break;
2964 case 2:
Cyril Bonté1e2a1702011-03-03 21:05:17 +0100[diff] [blame]2965 if ((px->state != PR_STSTOPPED) && (sv->state & SRV_MAINTAIN)) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2966 /* Already in maintenance, we can change the server state */
2967 set_server_up(sv);
Willy Tarreau70461302010-10-22 14:39:02 +0200[diff] [blame]2968 sv->health = sv->rise; /* up, but will fall down at first failure */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2969 si->applet.ctx.stats.st_code = STAT_STATUS_DONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2970 }
2971 break;
2972 }
2973 }
2974 }
2975 next_param = cur_param;
2976 }
2977 }
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2978 return 1;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2979}
2980
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2981/* returns a pointer to the first rule which forbids access (deny or http_auth),
2982 * or NULL if everything's OK.
2983 */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2984static inline struct http_req_rule *
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2985http_check_access_rule(struct proxy *px, struct list *rules, struct session *s, struct http_txn *txn)
2986{
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2987 struct http_req_rule *rule;
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2988
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2989 list_for_each_entry(rule, rules, list) {
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2990 int ret = 1;
2991
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2992 if (rule->action >= HTTP_REQ_ACT_MAX)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2993 continue;
2994
2995 /* check condition, but only if attached */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2996 if (rule->cond) {
2997 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2998 ret = acl_pass(ret);
2999
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3000 if (rule->cond->pol == ACL_COND_UNLESS)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3001 ret = !ret;
3002 }
3003
3004 if (ret) {
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3005 if (rule->action == HTTP_REQ_ACT_ALLOW)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3006 return NULL; /* no problem */
3007 else
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3008 return rule; /* most likely a deny or auth rule */
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3009 }
3010 }
3011 return NULL;
3012}
3013
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3014/* This stream analyser runs all HTTP request processing which is common to
3015 * frontends and backends, which means blocking ACLs, filters, connection-close,
3016 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3017 * 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]3018 * either needs more data or wants to immediately abort the request (eg: deny,
3019 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3020 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3021int 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]3022{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3023 struct http_txn *txn = &s->txn;
3024 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3025 struct acl_cond *cond;
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3026 struct http_req_rule *http_req_last_rule = NULL;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3027 struct redirect_rule *rule;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]3028 struct cond_wordlist *wl;
Simon Horman70735c92011-06-07 11:07:50 +0900[diff] [blame]3029 int do_stats;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3030
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3031 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3032 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3033 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3034 return 0;
3035 }
3036
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3037 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3038 req->analyse_exp = TICK_ETERNITY;
3039
3040 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3041 now_ms, __FUNCTION__,
3042 s,
3043 req,
3044 req->rex, req->wex,
3045 req->flags,
3046 req->l,
3047 req->analysers);
3048
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3049 /* first check whether we have some ACLs set to block this request */
3050 list_for_each_entry(cond, &px->block_cond, list) {
3051 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]3052
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3053 ret = acl_pass(ret);
3054 if (cond->pol == ACL_COND_UNLESS)
3055 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]3056
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3057 if (ret) {
3058 txn->status = 403;
3059 /* let's log the request time */
3060 s->logs.tv_request = now;
3061 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3062 session_inc_http_err_ctr(s);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3063 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3064 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3065 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3066
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3067 /* evaluate http-request rules */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3068 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]3069
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3070 /* evaluate stats http-request rules only if http-request is OK */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3071 if (!http_req_last_rule) {
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3072 do_stats = stats_check_uri(s->rep->prod, txn, px);
3073 if (do_stats)
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3074 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]3075 }
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3076 else
3077 do_stats = 0;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3078
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3079 /* return a 403 if either rule has blocked */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3080 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]3081 txn->status = 403;
3082 s->logs.tv_request = now;
3083 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3084 session_inc_http_err_ctr(s);
Willy Tarreau6da0f6d2011-01-06 18:19:50 +0100[diff] [blame]3085 s->fe->fe_counters.denied_req++;
3086 if (an_bit == AN_REQ_HTTP_PROCESS_BE)
3087 s->be->be_counters.denied_req++;
3088 if (s->listener->counters)
3089 s->listener->counters->denied_req++;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3090 goto return_prx_cond;
3091 }
3092
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3093 /* try headers filters */
3094 if (px->req_exp != NULL) {
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]3095 if (apply_filters_to_request(s, req, px) < 0)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3096 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3097
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3098 /* has the request been denied ? */
3099 if (txn->flags & TX_CLDENY) {
3100 /* no need to go further */
3101 txn->status = 403;
3102 /* let's log the request time */
3103 s->logs.tv_request = now;
3104 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3105 session_inc_http_err_ctr(s);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3106 goto return_prx_cond;
3107 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3108
3109 /* When a connection is tarpitted, we use the tarpit timeout,
3110 * which may be the same as the connect timeout if unspecified.
3111 * If unset, then set it to zero because we really want it to
3112 * eventually expire. We build the tarpit as an analyser.
3113 */
3114 if (txn->flags & TX_CLTARPIT) {
3115 buffer_erase(s->req);
3116 /* wipe the request out so that we can drop the connection early
3117 * if the client closes first.
3118 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3119 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3120 req->analysers = 0; /* remove switching rules etc... */
3121 req->analysers |= AN_REQ_HTTP_TARPIT;
3122 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
3123 if (!req->analyse_exp)
3124 req->analyse_exp = tick_add(now_ms, 0);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3125 session_inc_http_err_ctr(s);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3126 return 1;
3127 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3128 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3129
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3130 /* Until set to anything else, the connection mode is set as TUNNEL. It will
3131 * only change if both the request and the config reference something else.
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3132 * Option httpclose by itself does not set a mode, it remains a tunnel mode
3133 * in which headers are mangled. However, if another mode is set, it will
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3134 * affect it (eg: server-close/keep-alive + httpclose = close). Note that we
3135 * avoid to redo the same work if FE and BE have the same settings (common).
3136 * The method consists in checking if options changed between the two calls
3137 * (implying that either one is non-null, or one of them is non-null and we
3138 * are there for the first time.
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]3139 */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3140
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]3141 if ((!(txn->flags & TX_HDR_CONN_PRS) &&
3142 (s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) ||
3143 ((s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) !=
3144 (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]3145 int tmp = TX_CON_WANT_TUN;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3146
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]3147 if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE ||
3148 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3149 tmp = TX_CON_WANT_KAL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]3150 if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO)
3151 tmp = TX_CON_WANT_SCL;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3152 if ((s->fe->options|s->be->options) & PR_O_FORCE_CLO)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3153 tmp = TX_CON_WANT_CLO;
3154
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3155 if ((txn->flags & TX_CON_WANT_MSK) < tmp)
3156 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3157
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3158 if (!(txn->flags & TX_HDR_CONN_PRS)) {
3159 /* parse the Connection header and possibly clean it */
3160 int to_del = 0;
3161 if ((txn->flags & TX_REQ_VER_11) ||
Willy Tarreau8a8e1d92010-04-05 16:15:16 +0200[diff] [blame]3162 ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL &&
3163 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3164 to_del |= 2; /* remove "keep-alive" */
3165 if (!(txn->flags & TX_REQ_VER_11))
3166 to_del |= 1; /* remove "close" */
3167 http_parse_connection_header(txn, msg, req, to_del);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3168 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3169
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3170 /* check if client or config asks for explicit close in KAL/SCL */
3171 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
3172 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
3173 ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */
3174 (txn->flags & (TX_REQ_VER_11|TX_HDR_CONN_KAL)) == 0 || /* no "connection: k-a" in 1.0 */
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]3175 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) || /* httpclose+any = forceclose */
Willy Tarreauc3e8b252010-01-28 15:01:20 +0100[diff] [blame]3176 !(txn->flags & TX_REQ_XFER_LEN) || /* no length known => close */
3177 s->fe->state == PR_STSTOPPED)) /* frontend is stopping */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3178 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
3179 }
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]3180
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3181 /* we can be blocked here because the request needs to be authenticated,
3182 * either to pass or to access stats.
3183 */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3184 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]3185 struct chunk msg;
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3186 char *realm = http_req_last_rule->http_auth.realm;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3187
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3188 if (!realm)
3189 realm = do_stats?STATS_DEFAULT_REALM:px->id;
3190
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]3191 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]3192 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
3193 txn->status = 401;
3194 stream_int_retnclose(req->prod, &msg);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3195 /* on 401 we still count one error, because normal browsing
3196 * won't significantly increase the counter but brute force
3197 * attempts will.
3198 */
3199 session_inc_http_err_ctr(s);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3200 goto return_prx_cond;
3201 }
3202
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3203 /* add request headers from the rule sets in the same order */
3204 list_for_each_entry(wl, &px->req_add, list) {
3205 if (wl->cond) {
3206 int ret = acl_exec_cond(wl->cond, px, s, txn, ACL_DIR_REQ);
3207 ret = acl_pass(ret);
3208 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
3209 ret = !ret;
3210 if (!ret)
3211 continue;
3212 }
3213
3214 if (unlikely(http_header_add_tail(req, &txn->req, &txn->hdr_idx, wl->s) < 0))
3215 goto return_bad_req;
3216 }
3217
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3218 if (do_stats) {
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3219 struct stats_admin_rule *stats_admin_rule;
3220
3221 /* We need to provide stats for this request.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3222 * FIXME!!! that one is rather dangerous, we want to
3223 * make it follow standard rules (eg: clear req->analysers).
3224 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3225
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3226 /* now check whether we have some admin rules for this request */
3227 list_for_each_entry(stats_admin_rule, &s->be->uri_auth->admin_rules, list) {
3228 int ret = 1;
3229
3230 if (stats_admin_rule->cond) {
3231 ret = acl_exec_cond(stats_admin_rule->cond, s->be, s, &s->txn, ACL_DIR_REQ);
3232 ret = acl_pass(ret);
3233 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
3234 ret = !ret;
3235 }
3236
3237 if (ret) {
3238 /* no rule, or the rule matches */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3239 s->rep->prod->applet.ctx.stats.flags |= STAT_ADMIN;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3240 break;
3241 }
3242 }
3243
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]3244 /* Was the status page requested with a POST ? */
3245 if (txn->meth == HTTP_METH_POST) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3246 if (s->rep->prod->applet.ctx.stats.flags & STAT_ADMIN) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]3247 if (msg->msg_state < HTTP_MSG_100_SENT) {
3248 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3249 * send an HTTP/1.1 100 Continue intermediate response.
3250 */
3251 if (txn->flags & TX_REQ_VER_11) {
3252 struct hdr_ctx ctx;
3253 ctx.idx = 0;
3254 /* Expect is allowed in 1.1, look for it */
3255 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3256 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3257 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3258 }
3259 }
3260 msg->msg_state = HTTP_MSG_100_SENT;
3261 s->logs.tv_request = now; /* update the request timer to reflect full request */
3262 }
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3263 if (!http_process_req_stat_post(s->rep->prod, txn, req)) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]3264 /* we need more data */
3265 req->analysers |= an_bit;
3266 buffer_dont_connect(req);
3267 return 0;
3268 }
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3269 } else {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3270 s->rep->prod->applet.ctx.stats.st_code = STAT_STATUS_DENY;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3271 }
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]3272 }
3273
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3274 s->logs.tv_request = now;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3275 s->task->nice = -32; /* small boost for HTTP statistics */
Willy Tarreaub24281b2011-02-13 13:16:36 +0100[diff] [blame]3276 stream_int_register_handler(s->rep->prod, &http_stats_applet);
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]3277 copy_target(&s->target, &s->rep->prod->target); // for logging only
Willy Tarreaubc4af052011-02-13 13:25:14 +0100[diff] [blame]3278 s->rep->prod->applet.private = s;
3279 s->rep->prod->applet.st0 = s->rep->prod->applet.st1 = 0;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3280 req->analysers = 0;
3281
3282 return 0;
3283
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3284 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3285
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3286 /* check whether we have some ACLs set to redirect this request */
3287 list_for_each_entry(rule, &px->redirect_rules, list) {
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3288 int ret = ACL_PAT_PASS;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3289
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3290 if (rule->cond) {
3291 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
3292 ret = acl_pass(ret);
3293 if (rule->cond->pol == ACL_COND_UNLESS)
3294 ret = !ret;
3295 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3296
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3297 if (ret) {
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3298 struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 };
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3299 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3300
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3301 /* build redirect message */
3302 switch(rule->code) {
3303 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3304 msg_fmt = HTTP_303;
3305 break;
3306 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3307 msg_fmt = HTTP_301;
3308 break;
3309 case 302:
3310 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3311 msg_fmt = HTTP_302;
3312 break;
3313 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3314
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3315 if (unlikely(!chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3316 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3317
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3318 switch(rule->type) {
3319 case REDIRECT_TYPE_PREFIX: {
3320 const char *path;
3321 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3322
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3323 path = http_get_path(txn);
3324 /* build message using path */
3325 if (path) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3326 pathlen = txn->req.sl.rq.u_l + (txn->req.sol + txn->req.sl.rq.u) - path;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3327 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
3328 int qs = 0;
3329 while (qs < pathlen) {
3330 if (path[qs] == '?') {
3331 pathlen = qs;
3332 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3333 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3334 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3335 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3336 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3337 } else {
3338 path = "/";
3339 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3340 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3341
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3342 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3343 goto return_bad_req;
3344
3345 /* add prefix. Note that if prefix == "/", we don't want to
3346 * add anything, otherwise it makes it hard for the user to
3347 * configure a self-redirection.
3348 */
3349 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3350 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3351 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3352 }
3353
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3354 /* add path */
3355 memcpy(rdr.str + rdr.len, path, pathlen);
3356 rdr.len += pathlen;
Willy Tarreau81e3b4f2010-01-10 00:42:19 +0100[diff] [blame]3357
3358 /* append a slash at the end of the location is needed and missing */
3359 if (rdr.len && rdr.str[rdr.len - 1] != '/' &&
3360 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
3361 if (rdr.len > rdr.size - 5)
3362 goto return_bad_req;
3363 rdr.str[rdr.len] = '/';
3364 rdr.len++;
3365 }
3366
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3367 break;
3368 }
3369 case REDIRECT_TYPE_LOCATION:
3370 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3371 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3372 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3373
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3374 /* add location */
3375 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3376 rdr.len += rule->rdr_len;
3377 break;
3378 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3379
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3380 if (rule->cookie_len) {
3381 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
3382 rdr.len += 14;
3383 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
3384 rdr.len += rule->cookie_len;
3385 memcpy(rdr.str + rdr.len, "\r\n", 2);
3386 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3387 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3388
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3389 /* add end of headers and the keep-alive/close status.
3390 * We may choose to set keep-alive if the Location begins
3391 * with a slash, because the client will come back to the
3392 * same server.
3393 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3394 txn->status = rule->code;
3395 /* let's log the request time */
3396 s->logs.tv_request = now;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3397
3398 if (rule->rdr_len >= 1 && *rule->rdr_str == '/' &&
3399 (txn->flags & TX_REQ_XFER_LEN) &&
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3400 !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.body_len &&
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3401 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
3402 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
3403 /* keep-alive possible */
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3404 if (!(txn->flags & TX_REQ_VER_11)) {
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3405 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3406 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: keep-alive", 30);
3407 rdr.len += 30;
3408 } else {
3409 memcpy(rdr.str + rdr.len, "\r\nConnection: keep-alive", 24);
3410 rdr.len += 24;
3411 }
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3412 }
3413 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
3414 rdr.len += 4;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3415 buffer_write(req->prod->ob, rdr.str, rdr.len);
3416 /* "eat" the request */
3417 buffer_ignore(req, msg->sov - msg->som);
3418 msg->som = msg->sov;
3419 req->analysers = AN_REQ_HTTP_XFER_BODY;
Willy Tarreau9300fb22010-01-05 00:58:24 +0100[diff] [blame]3420 s->rep->analysers = AN_RES_HTTP_XFER_BODY;
3421 txn->req.msg_state = HTTP_MSG_CLOSED;
3422 txn->rsp.msg_state = HTTP_MSG_DONE;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3423 break;
3424 } else {
3425 /* keep-alive not possible */
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3426 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3427 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
3428 rdr.len += 29;
3429 } else {
3430 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
3431 rdr.len += 23;
3432 }
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]3433 stream_int_retnclose(req->prod, &rdr);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3434 goto return_prx_cond;
3435 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3436 }
3437 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3438
Willy Tarreau2be39392010-01-03 17:24:51 +0100[diff] [blame]3439 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
3440 * If this happens, then the data will not come immediately, so we must
3441 * send all what we have without waiting. Note that due to the small gain
3442 * in waiting for the body of the request, it's easier to simply put the
3443 * BF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
3444 * itself once used.
3445 */
3446 req->flags |= BF_SEND_DONTWAIT;
3447
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3448 /* that's OK for us now, let's move on to next analysers */
3449 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]3450
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3451 return_bad_req:
3452 /* We centralize bad requests processing here */
3453 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
3454 /* we detected a parsing error. We want to archive this request
3455 * in the dedicated proxy area for later troubleshooting.
3456 */
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]3457 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3458 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3459
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3460 txn->req.msg_state = HTTP_MSG_ERROR;
3461 txn->status = 400;
3462 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3463
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3464 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3465 if (s->listener->counters)
3466 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]3467
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3468 return_prx_cond:
3469 if (!(s->flags & SN_ERR_MASK))
3470 s->flags |= SN_ERR_PRXCOND;
3471 if (!(s->flags & SN_FINST_MASK))
3472 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]3473
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3474 req->analysers = 0;
3475 req->analyse_exp = TICK_ETERNITY;
3476 return 0;
3477}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3478
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3479/* This function performs all the processing enabled for the current request.
3480 * It returns 1 if the processing can continue on next analysers, or zero if it
3481 * needs more data, encounters an error, or wants to immediately abort the
3482 * request. It relies on buffers flags, and updates s->req->analysers.
3483 */
3484int http_process_request(struct session *s, struct buffer *req, int an_bit)
3485{
3486 struct http_txn *txn = &s->txn;
3487 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3488
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3489 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3490 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3491 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3492 return 0;
3493 }
3494
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3495 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3496 now_ms, __FUNCTION__,
3497 s,
3498 req,
3499 req->rex, req->wex,
3500 req->flags,
3501 req->l,
3502 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3503
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3504 /*
3505 * Right now, we know that we have processed the entire headers
3506 * and that unwanted requests have been filtered out. We can do
3507 * whatever we want with the remaining request. Also, now we
3508 * may have separate values for ->fe, ->be.
3509 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3510
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3511 /*
3512 * If HTTP PROXY is set we simply get remote server address
3513 * parsing incoming request.
3514 */
3515 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3516 url2sa(msg->sol + msg->sl.rq.u, msg->sl.rq.u_l, &s->req->cons->addr.s.to);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3517 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3518
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3519 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3520 * 7: Now we can work with the cookies.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3521 * Note that doing so might move headers in the request, but
3522 * the fields will stay coherent and the URI will not move.
3523 * This should only be performed in the backend.
3524 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]3525 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3526 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
3527 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]3528
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3529 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3530 * 8: the appsession cookie was looked up very early in 1.2,
3531 * so let's do the same now.
3532 */
3533
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]3534 /* It needs to look into the URI unless persistence must be ignored */
3535 if ((txn->sessid == NULL) && s->be->appsession_name && !(s->flags & SN_IGNORE_PRST)) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3536 get_srv_from_appsession(s, msg->sol + msg->sl.rq.u, msg->sl.rq.u_l);
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3537 }
3538
3539 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3540 * 9: add X-Forwarded-For if either the frontend or the backend
3541 * asks for it.
3542 */
3543 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
Willy Tarreau87cf5142011-08-19 22:57:24 +0200[diff] [blame]3544 struct hdr_ctx ctx = { .idx = 0 };
3545
3546 if (!((s->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
3547 http_find_header2("X-Forwarded-For", 15, txn->req.sol, &txn->hdr_idx, &ctx)) {
3548 /* The header is set to be added only if none is present
3549 * and we found it, so don't do anything.
3550 */
3551 }
3552 else if (s->req->prod->addr.c.from.ss_family == AF_INET) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3553 /* Add an X-Forwarded-For header unless the source IP is
3554 * in the 'except' network range.
3555 */
3556 if ((!s->fe->except_mask.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3557 (((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_addr.s_addr & s->fe->except_mask.s_addr)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3558 != s->fe->except_net.s_addr) &&
3559 (!s->be->except_mask.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3560 (((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_addr.s_addr & s->be->except_mask.s_addr)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3561 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3562 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3563 unsigned char *pn;
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3564 pn = (unsigned char *)&((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3565
3566 /* Note: we rely on the backend to get the header name to be used for
3567 * x-forwarded-for, because the header is really meant for the backends.
3568 * However, if the backend did not specify any option, we have to rely
3569 * on the frontend's header name.
3570 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3571 if (s->be->fwdfor_hdr_len) {
3572 len = s->be->fwdfor_hdr_len;
3573 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3574 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3575 len = s->fe->fwdfor_hdr_len;
3576 memcpy(trash, s->fe->fwdfor_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3577 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3578 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]3579
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]3580 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3581 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3582 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3583 }
3584 }
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3585 else if (s->req->prod->addr.c.from.ss_family == AF_INET6) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3586 /* FIXME: for the sake of completeness, we should also support
3587 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3588 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3589 int len;
3590 char pn[INET6_ADDRSTRLEN];
3591 inet_ntop(AF_INET6,
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3592 (const void *)&((struct sockaddr_in6 *)(&s->req->prod->addr.c.from))->sin6_addr,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3593 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3594
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3595 /* Note: we rely on the backend to get the header name to be used for
3596 * x-forwarded-for, because the header is really meant for the backends.
3597 * However, if the backend did not specify any option, we have to rely
3598 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3599 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3600 if (s->be->fwdfor_hdr_len) {
3601 len = s->be->fwdfor_hdr_len;
3602 memcpy(trash, s->be->fwdfor_hdr_name, len);
3603 } else {
3604 len = s->fe->fwdfor_hdr_len;
3605 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3606 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3607 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3608
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3609 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3610 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3611 goto return_bad_req;
3612 }
3613 }
3614
3615 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3616 * 10: add X-Original-To if either the frontend or the backend
3617 * asks for it.
3618 */
3619 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
3620
3621 /* FIXME: don't know if IPv6 can handle that case too. */
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3622 if (s->req->prod->addr.c.from.ss_family == AF_INET) {
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3623 /* Add an X-Original-To header unless the destination IP is
3624 * in the 'except' network range.
3625 */
3626 if (!(s->flags & SN_FRT_ADDR_SET))
3627 get_frt_addr(s);
3628
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3629 if (s->req->prod->addr.c.to.ss_family == AF_INET &&
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]3630 ((!s->fe->except_mask_to.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3631 (((struct sockaddr_in *)&s->req->prod->addr.c.to)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]3632 != s->fe->except_to.s_addr) &&
3633 (!s->be->except_mask_to.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3634 (((struct sockaddr_in *)&s->req->prod->addr.c.to)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]3635 != s->be->except_to.s_addr))) {
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3636 int len;
3637 unsigned char *pn;
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3638 pn = (unsigned char *)&((struct sockaddr_in *)&s->req->prod->addr.c.to)->sin_addr;
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3639
3640 /* Note: we rely on the backend to get the header name to be used for
3641 * x-original-to, because the header is really meant for the backends.
3642 * However, if the backend did not specify any option, we have to rely
3643 * on the frontend's header name.
3644 */
3645 if (s->be->orgto_hdr_len) {
3646 len = s->be->orgto_hdr_len;
3647 memcpy(trash, s->be->orgto_hdr_name, len);
3648 } else {
3649 len = s->fe->orgto_hdr_len;
3650 memcpy(trash, s->fe->orgto_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3651 }
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3652 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
3653
3654 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3655 &txn->hdr_idx, trash, len) < 0))
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3656 goto return_bad_req;
3657 }
3658 }
3659 }
3660
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3661 /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set. */
3662 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]3663 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3664 unsigned int want_flags = 0;
3665
3666 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3667 if (((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL ||
3668 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) &&
3669 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3670 want_flags |= TX_CON_CLO_SET;
3671 } else {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3672 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL &&
3673 !((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) ||
3674 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3675 want_flags |= TX_CON_KAL_SET;
3676 }
3677
3678 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
3679 http_change_connection_header(txn, msg, req, want_flags);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3680 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3681
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3682
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3683 /* If we have no server assigned yet and we're balancing on url_param
3684 * with a POST request, we may be interested in checking the body for
3685 * that parameter. This will be done in another analyser.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3686 */
3687 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
3688 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3689 s->be->url_param_post_limit != 0 &&
Willy Tarreau61a21a32011-03-01 20:35:49 +0100[diff] [blame]3690 (txn->flags & (TX_REQ_CNT_LEN|TX_REQ_TE_CHNK))) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3691 buffer_dont_connect(req);
3692 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3693 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3694
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3695 if (txn->flags & TX_REQ_XFER_LEN)
3696 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]3697
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3698 /*************************************************************
3699 * OK, that's finished for the headers. We have done what we *
3700 * could. Let's switch to the DATA state. *
3701 ************************************************************/
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3702 req->analyse_exp = TICK_ETERNITY;
3703 req->analysers &= ~an_bit;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3704
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3705 s->logs.tv_request = now;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3706 /* OK let's go on with the BODY now */
3707 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3708
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3709 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3710 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3711 /* we detected a parsing error. We want to archive this request
3712 * in the dedicated proxy area for later troubleshooting.
3713 */
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]3714 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3715 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3716
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3717 txn->req.msg_state = HTTP_MSG_ERROR;
3718 txn->status = 400;
3719 req->analysers = 0;
3720 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3721
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3722 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3723 if (s->listener->counters)
3724 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3725
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3726 if (!(s->flags & SN_ERR_MASK))
3727 s->flags |= SN_ERR_PRXCOND;
3728 if (!(s->flags & SN_FINST_MASK))
3729 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3730 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3731}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3732
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3733/* This function is an analyser which processes the HTTP tarpit. It always
3734 * returns zero, at the beginning because it prevents any other processing
3735 * from occurring, and at the end because it terminates the request.
3736 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3737int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3738{
3739 struct http_txn *txn = &s->txn;
3740
3741 /* This connection is being tarpitted. The CLIENT side has
3742 * already set the connect expiration date to the right
3743 * timeout. We just have to check that the client is still
3744 * there and that the timeout has not expired.
3745 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3746 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3747 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
3748 !tick_is_expired(req->analyse_exp, now_ms))
3749 return 0;
3750
3751 /* We will set the queue timer to the time spent, just for
3752 * logging purposes. We fake a 500 server error, so that the
3753 * attacker will not suspect his connection has been tarpitted.
3754 * It will not cause trouble to the logs because we can exclude
3755 * the tarpitted connections by filtering on the 'PT' status flags.
3756 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3757 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
3758
3759 txn->status = 500;
3760 if (req->flags != BF_READ_ERROR)
3761 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
3762
3763 req->analysers = 0;
3764 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3765
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3766 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3767 if (s->listener->counters)
3768 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3769
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3770 if (!(s->flags & SN_ERR_MASK))
3771 s->flags |= SN_ERR_PRXCOND;
3772 if (!(s->flags & SN_FINST_MASK))
3773 s->flags |= SN_FINST_T;
3774 return 0;
3775}
3776
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3777/* This function is an analyser which processes the HTTP request body. It looks
3778 * for parameters to be used for the load balancing algorithm (url_param). It
3779 * must only be called after the standard HTTP request processing has occurred,
3780 * because it expects the request to be parsed. It returns zero if it needs to
3781 * read more data, or 1 once it has completed its analysis.
3782 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3783int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3784{
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3785 struct http_txn *txn = &s->txn;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3786 struct http_msg *msg = &s->txn.req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3787 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3788
3789 /* We have to parse the HTTP request body to find any required data.
3790 * "balance url_param check_post" should have been the only way to get
3791 * into this. We were brought here after HTTP header analysis, so all
3792 * related structures are ready.
3793 */
3794
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3795 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3796 goto missing_data;
3797
3798 if (msg->msg_state < HTTP_MSG_100_SENT) {
3799 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3800 * send an HTTP/1.1 100 Continue intermediate response.
3801 */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]3802 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3803 struct hdr_ctx ctx;
3804 ctx.idx = 0;
3805 /* Expect is allowed in 1.1, look for it */
3806 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3807 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3808 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3809 }
3810 }
3811 msg->msg_state = HTTP_MSG_100_SENT;
3812 }
3813
3814 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3815 /* we have msg->col and msg->sov which both point to the first
3816 * byte of message body. msg->som still points to the beginning
3817 * of the message. We must save the body in req->lr because it
3818 * survives buffer re-alignments.
3819 */
3820 req->lr = req->data + msg->sov;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3821 if (txn->flags & TX_REQ_TE_CHNK)
3822 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3823 else
3824 msg->msg_state = HTTP_MSG_DATA;
3825 }
3826
3827 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3828 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3829 * set ->sov and ->lr to point to the body and switch to DATA or
3830 * TRAILERS state.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3831 */
3832 int ret = http_parse_chunk_size(req, msg);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3833
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3834 if (!ret)
3835 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3836 else if (ret < 0) {
3837 session_inc_http_err_ctr(s);
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3838 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3839 }
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3840 }
3841
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3842 /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3843 * We have the first non-header byte in msg->col, which is either the
3844 * beginning of the chunk size or of the data. The first data byte is in
3845 * msg->sov, which is equal to msg->col when not using transfer-encoding.
3846 * We're waiting for at least <url_param_post_limit> bytes after msg->sov.
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3847 */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3848
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3849 if (msg->body_len < limit)
3850 limit = msg->body_len;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3851
Willy Tarreau7c96f672009-12-27 22:47:25 +0100[diff] [blame]3852 if (req->l - (msg->sov - msg->som) >= limit) /* we have enough bytes now */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3853 goto http_end;
3854
3855 missing_data:
3856 /* we get here if we need to wait for more data */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3857 if (req->flags & BF_FULL) {
3858 session_inc_http_err_ctr(s);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3859 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3860 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3861
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3862 if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
3863 txn->status = 408;
3864 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3865
3866 if (!(s->flags & SN_ERR_MASK))
3867 s->flags |= SN_ERR_CLITO;
3868 if (!(s->flags & SN_FINST_MASK))
3869 s->flags |= SN_FINST_D;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3870 goto return_err_msg;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3871 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3872
3873 /* we get here if we need to wait for more data */
3874 if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3875 /* Not enough data. We'll re-use the http-request
3876 * timeout here. Ideally, we should set the timeout
3877 * relative to the accept() date. We just set the
3878 * request timeout once at the beginning of the
3879 * request.
3880 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3881 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3882 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]3883 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3884 return 0;
3885 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3886
3887 http_end:
3888 /* The situation will not evolve, so let's give up on the analysis. */
3889 s->logs.tv_request = now; /* update the request timer to reflect full request */
3890 req->analysers &= ~an_bit;
3891 req->analyse_exp = TICK_ETERNITY;
3892 return 1;
3893
3894 return_bad_req: /* let's centralize all bad requests */
3895 txn->req.msg_state = HTTP_MSG_ERROR;
3896 txn->status = 400;
3897 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
3898
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3899 if (!(s->flags & SN_ERR_MASK))
3900 s->flags |= SN_ERR_PRXCOND;
3901 if (!(s->flags & SN_FINST_MASK))
3902 s->flags |= SN_FINST_R;
3903
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3904 return_err_msg:
3905 req->analysers = 0;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3906 s->fe->fe_counters.failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3907 if (s->listener->counters)
3908 s->listener->counters->failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3909 return 0;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3910}
3911
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3912/* Terminate current transaction and prepare a new one. This is very tricky
3913 * right now but it works.
3914 */
3915void http_end_txn_clean_session(struct session *s)
3916{
3917 /* FIXME: We need a more portable way of releasing a backend's and a
3918 * server's connections. We need a safer way to reinitialize buffer
3919 * flags. We also need a more accurate method for computing per-request
3920 * data.
3921 */
3922 http_silent_debug(__LINE__, s);
3923
3924 s->req->cons->flags |= SI_FL_NOLINGER;
3925 s->req->cons->shutr(s->req->cons);
3926 s->req->cons->shutw(s->req->cons);
3927
3928 http_silent_debug(__LINE__, s);
3929
3930 if (s->flags & SN_BE_ASSIGNED)
3931 s->be->beconn--;
3932
3933 s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
3934 session_process_counters(s);
Willy Tarreauf059a0f2010-08-03 16:29:52 +0200[diff] [blame]3935 session_stop_backend_counters(s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3936
3937 if (s->txn.status) {
3938 int n;
3939
3940 n = s->txn.status / 100;
3941 if (n < 1 || n > 5)
3942 n = 0;
3943
3944 if (s->fe->mode == PR_MODE_HTTP)
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3945 s->fe->fe_counters.p.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3946
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3947 if ((s->flags & SN_BE_ASSIGNED) &&
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3948 (s->be->mode == PR_MODE_HTTP))
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3949 s->be->be_counters.p.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3950 }
3951
3952 /* don't count other requests' data */
3953 s->logs.bytes_in -= s->req->l - s->req->send_max;
3954 s->logs.bytes_out -= s->rep->l - s->rep->send_max;
3955
3956 /* let's do a final log if we need it */
3957 if (s->logs.logwait &&
3958 !(s->flags & SN_MONITOR) &&
3959 (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
3960 s->do_log(s);
3961 }
3962
3963 s->logs.accept_date = date; /* user-visible date for logging */
3964 s->logs.tv_accept = now; /* corrected date for internal use */
3965 tv_zero(&s->logs.tv_request);
3966 s->logs.t_queue = -1;
3967 s->logs.t_connect = -1;
3968 s->logs.t_data = -1;
3969 s->logs.t_close = 0;
3970 s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
3971 s->logs.srv_queue_size = 0; /* we will get this number soon */
3972
3973 s->logs.bytes_in = s->req->total = s->req->l - s->req->send_max;
3974 s->logs.bytes_out = s->rep->total = s->rep->l - s->rep->send_max;
3975
3976 if (s->pend_pos)
3977 pendconn_free(s->pend_pos);
3978
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3979 if (target_srv(&s->target)) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3980 if (s->flags & SN_CURR_SESS) {
3981 s->flags &= ~SN_CURR_SESS;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3982 target_srv(&s->target)->cur_sess--;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3983 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3984 if (may_dequeue_tasks(target_srv(&s->target), s->be))
3985 process_srv_queue(target_srv(&s->target));
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3986 }
3987
3988 if (unlikely(s->srv_conn))
3989 sess_change_server(s, NULL);
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]3990 clear_target(&s->target);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3991
3992 s->req->cons->state = s->req->cons->prev_state = SI_ST_INI;
3993 s->req->cons->fd = -1; /* just to help with debugging */
3994 s->req->cons->err_type = SI_ET_NONE;
Willy Tarreau0b3a4112011-03-27 19:16:56 +0200[diff] [blame]3995 s->req->cons->conn_retries = 0; /* used for logging too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3996 s->req->cons->err_loc = NULL;
3997 s->req->cons->exp = TICK_ETERNITY;
3998 s->req->cons->flags = SI_FL_NONE;
Willy Tarreau96e31212011-05-30 18:10:30 +0200[diff] [blame]3999 s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST|BF_NEVER_WAIT);
4000 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]4001 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]4002 s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE);
4003 s->txn.meth = 0;
4004 http_reset_txn(s);
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]4005 s->txn.flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ;
Willy Tarreauee55dc02010-06-01 10:56:34 +0200[diff] [blame]4006 if (s->fe->options2 & PR_O2_INDEPSTR)
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4007 s->req->cons->flags |= SI_FL_INDEP_STR;
4008
Willy Tarreau96e31212011-05-30 18:10:30 +0200[diff] [blame]4009 if (s->fe->options2 & PR_O2_NODELAY) {
4010 s->req->flags |= BF_NEVER_WAIT;
4011 s->rep->flags |= BF_NEVER_WAIT;
4012 }
4013
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4014 /* if the request buffer is not empty, it means we're
4015 * about to process another request, so send pending
4016 * data with MSG_MORE to merge TCP packets when possible.
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]4017 * Just don't do this if the buffer is close to be full,
4018 * because the request will wait for it to flush a little
4019 * bit before proceeding.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4020 */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]4021 if (s->req->l > s->req->send_max) {
4022 if (s->rep->send_max &&
4023 !(s->rep->flags & BF_FULL) &&
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]4024 s->rep->r <= s->rep->data + s->rep->size - global.tune.maxrewrite)
4025 s->rep->flags |= BF_EXPECT_MORE;
4026 }
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4027
4028 /* we're removing the analysers, we MUST re-enable events detection */
4029 buffer_auto_read(s->req);
4030 buffer_auto_close(s->req);
4031 buffer_auto_read(s->rep);
4032 buffer_auto_close(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4033
4034 /* make ->lr point to the first non-forwarded byte */
4035 s->req->lr = s->req->w + s->req->send_max;
4036 if (s->req->lr >= s->req->data + s->req->size)
4037 s->req->lr -= s->req->size;
4038 s->rep->lr = s->rep->w + s->rep->send_max;
4039 if (s->rep->lr >= s->rep->data + s->rep->size)
4040 s->rep->lr -= s->req->size;
4041
Willy Tarreau342b11c2010-11-24 16:22:09 +0100[diff] [blame]4042 s->req->analysers = s->listener->analysers;
4043 s->req->analysers &= ~AN_REQ_DECODE_PROXY;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4044 s->rep->analysers = 0;
4045
4046 http_silent_debug(__LINE__, s);
4047}
4048
4049
4050/* This function updates the request state machine according to the response
4051 * state machine and buffer flags. It returns 1 if it changes anything (flag
4052 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
4053 * it is only used to find when a request/response couple is complete. Both
4054 * this function and its equivalent should loop until both return zero. It
4055 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
4056 */
4057int http_sync_req_state(struct session *s)
4058{
4059 struct buffer *buf = s->req;
4060 struct http_txn *txn = &s->txn;
4061 unsigned int old_flags = buf->flags;
4062 unsigned int old_state = txn->req.msg_state;
4063
4064 http_silent_debug(__LINE__, s);
4065 if (unlikely(txn->req.msg_state < HTTP_MSG_BODY))
4066 return 0;
4067
4068 if (txn->req.msg_state == HTTP_MSG_DONE) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4069 /* No need to read anymore, the request was completely parsed.
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4070 * We can shut the read side unless we want to abort_on_close,
4071 * or we have a POST request. The issue with POST requests is
4072 * that some browsers still send a CRLF after the request, and
4073 * this CRLF must be read so that it does not remain in the kernel
4074 * buffers, otherwise a close could cause an RST on some systems
4075 * (eg: Linux).
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4076 */
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4077 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4078 buffer_dont_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4079
4080 if (txn->rsp.msg_state == HTTP_MSG_ERROR)
4081 goto wait_other_side;
4082
4083 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
4084 /* The server has not finished to respond, so we
4085 * don't want to move in order not to upset it.
4086 */
4087 goto wait_other_side;
4088 }
4089
4090 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
4091 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4092 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4093 txn->req.msg_state = HTTP_MSG_TUNNEL;
4094 goto wait_other_side;
4095 }
4096
4097 /* When we get here, it means that both the request and the
4098 * response have finished receiving. Depending on the connection
4099 * mode, we'll have to wait for the last bytes to leave in either
4100 * direction, and sometimes for a close to be effective.
4101 */
4102
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4103 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4104 /* Server-close mode : queue a connection close to the server */
4105 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW)))
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4106 buffer_shutw_now(buf);
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4107 }
4108 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4109 /* Option forceclose is set, or either side wants to close,
4110 * let's enforce it now that we're not expecting any new
4111 * data to come. The caller knows the session is complete
4112 * once both states are CLOSED.
4113 */
4114 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4115 buffer_shutr_now(buf);
4116 buffer_shutw_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4117 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4118 }
4119 else {
4120 /* The last possible modes are keep-alive and tunnel. Since tunnel
4121 * mode does not set the body analyser, we can't reach this place
4122 * in tunnel mode, so we're left with keep-alive only.
4123 * This mode is currently not implemented, we switch to tunnel mode.
4124 */
4125 buffer_auto_read(buf);
4126 txn->req.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4127 }
4128
4129 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4130 /* if we've just closed an output, let's switch */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4131 buf->cons->flags |= SI_FL_NOLINGER; /* we want to close ASAP */
4132
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4133 if (!(buf->flags & BF_OUT_EMPTY)) {
4134 txn->req.msg_state = HTTP_MSG_CLOSING;
4135 goto http_msg_closing;
4136 }
4137 else {
4138 txn->req.msg_state = HTTP_MSG_CLOSED;
4139 goto http_msg_closed;
4140 }
4141 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4142 goto wait_other_side;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4143 }
4144
4145 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4146 http_msg_closing:
4147 /* nothing else to forward, just waiting for the output buffer
4148 * to be empty and for the shutw_now to take effect.
4149 */
4150 if (buf->flags & BF_OUT_EMPTY) {
4151 txn->req.msg_state = HTTP_MSG_CLOSED;
4152 goto http_msg_closed;
4153 }
4154 else if (buf->flags & BF_SHUTW) {
4155 txn->req.msg_state = HTTP_MSG_ERROR;
4156 goto wait_other_side;
4157 }
4158 }
4159
4160 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4161 http_msg_closed:
4162 goto wait_other_side;
4163 }
4164
4165 wait_other_side:
4166 http_silent_debug(__LINE__, s);
4167 return txn->req.msg_state != old_state || buf->flags != old_flags;
4168}
4169
4170
4171/* This function updates the response state machine according to the request
4172 * state machine and buffer flags. It returns 1 if it changes anything (flag
4173 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
4174 * it is only used to find when a request/response couple is complete. Both
4175 * this function and its equivalent should loop until both return zero. It
4176 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
4177 */
4178int http_sync_res_state(struct session *s)
4179{
4180 struct buffer *buf = s->rep;
4181 struct http_txn *txn = &s->txn;
4182 unsigned int old_flags = buf->flags;
4183 unsigned int old_state = txn->rsp.msg_state;
4184
4185 http_silent_debug(__LINE__, s);
4186 if (unlikely(txn->rsp.msg_state < HTTP_MSG_BODY))
4187 return 0;
4188
4189 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4190 /* In theory, we don't need to read anymore, but we must
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4191 * still monitor the server connection for a possible close
4192 * while the request is being uploaded, so we don't disable
4193 * reading.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4194 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4195 /* buffer_dont_read(buf); */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4196
4197 if (txn->req.msg_state == HTTP_MSG_ERROR)
4198 goto wait_other_side;
4199
4200 if (txn->req.msg_state < HTTP_MSG_DONE) {
4201 /* The client seems to still be sending data, probably
4202 * because we got an error response during an upload.
4203 * We have the choice of either breaking the connection
4204 * or letting it pass through. Let's do the later.
4205 */
4206 goto wait_other_side;
4207 }
4208
4209 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
4210 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4211 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4212 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4213 goto wait_other_side;
4214 }
4215
4216 /* When we get here, it means that both the request and the
4217 * response have finished receiving. Depending on the connection
4218 * mode, we'll have to wait for the last bytes to leave in either
4219 * direction, and sometimes for a close to be effective.
4220 */
4221
4222 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4223 /* Server-close mode : shut read and wait for the request
4224 * side to close its output buffer. The caller will detect
4225 * when we're in DONE and the other is in CLOSED and will
4226 * catch that for the final cleanup.
4227 */
4228 if (!(buf->flags & (BF_SHUTR|BF_SHUTR_NOW)))
4229 buffer_shutr_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4230 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4231 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4232 /* Option forceclose is set, or either side wants to close,
4233 * let's enforce it now that we're not expecting any new
4234 * data to come. The caller knows the session is complete
4235 * once both states are CLOSED.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4236 */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4237 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
4238 buffer_shutr_now(buf);
4239 buffer_shutw_now(buf);
4240 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4241 }
4242 else {
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4243 /* The last possible modes are keep-alive and tunnel. Since tunnel
4244 * mode does not set the body analyser, we can't reach this place
4245 * in tunnel mode, so we're left with keep-alive only.
4246 * This mode is currently not implemented, we switch to tunnel mode.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4247 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4248 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4249 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4250 }
4251
4252 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4253 /* if we've just closed an output, let's switch */
4254 if (!(buf->flags & BF_OUT_EMPTY)) {
4255 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4256 goto http_msg_closing;
4257 }
4258 else {
4259 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4260 goto http_msg_closed;
4261 }
4262 }
4263 goto wait_other_side;
4264 }
4265
4266 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4267 http_msg_closing:
4268 /* nothing else to forward, just waiting for the output buffer
4269 * to be empty and for the shutw_now to take effect.
4270 */
4271 if (buf->flags & BF_OUT_EMPTY) {
4272 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4273 goto http_msg_closed;
4274 }
4275 else if (buf->flags & BF_SHUTW) {
4276 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4277 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4278 if (target_srv(&s->target))
4279 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4280 goto wait_other_side;
4281 }
4282 }
4283
4284 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4285 http_msg_closed:
4286 /* drop any pending data */
4287 buffer_ignore(buf, buf->l - buf->send_max);
4288 buffer_auto_close(buf);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4289 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4290 goto wait_other_side;
4291 }
4292
4293 wait_other_side:
4294 http_silent_debug(__LINE__, s);
4295 return txn->rsp.msg_state != old_state || buf->flags != old_flags;
4296}
4297
4298
4299/* Resync the request and response state machines. Return 1 if either state
4300 * changes.
4301 */
4302int http_resync_states(struct session *s)
4303{
4304 struct http_txn *txn = &s->txn;
4305 int old_req_state = txn->req.msg_state;
4306 int old_res_state = txn->rsp.msg_state;
4307
4308 http_silent_debug(__LINE__, s);
4309 http_sync_req_state(s);
4310 while (1) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4311 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4312 if (!http_sync_res_state(s))
4313 break;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4314 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4315 if (!http_sync_req_state(s))
4316 break;
4317 }
4318 http_silent_debug(__LINE__, s);
4319 /* OK, both state machines agree on a compatible state.
4320 * There are a few cases we're interested in :
4321 * - HTTP_MSG_TUNNEL on either means we have to disable both analysers
4322 * - HTTP_MSG_CLOSED on both sides means we've reached the end in both
4323 * directions, so let's simply disable both analysers.
4324 * - HTTP_MSG_CLOSED on the response only means we must abort the
4325 * request.
4326 * - HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE on the response
4327 * with server-close mode means we've completed one request and we
4328 * must re-initialize the server connection.
4329 */
4330
4331 if (txn->req.msg_state == HTTP_MSG_TUNNEL ||
4332 txn->rsp.msg_state == HTTP_MSG_TUNNEL ||
4333 (txn->req.msg_state == HTTP_MSG_CLOSED &&
4334 txn->rsp.msg_state == HTTP_MSG_CLOSED)) {
4335 s->req->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4336 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4337 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4338 s->rep->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4339 buffer_auto_close(s->rep);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4340 buffer_auto_read(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4341 }
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4342 else if (txn->rsp.msg_state == HTTP_MSG_CLOSED ||
4343 txn->rsp.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4344 txn->req.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4345 (s->rep->flags & BF_SHUTW)) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4346 s->rep->analysers = 0;
4347 buffer_auto_close(s->rep);
4348 buffer_auto_read(s->rep);
4349 s->req->analysers = 0;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4350 buffer_abort(s->req);
4351 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4352 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4353 buffer_ignore(s->req, s->req->l - s->req->send_max);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4354 }
4355 else if (txn->req.msg_state == HTTP_MSG_CLOSED &&
4356 txn->rsp.msg_state == HTTP_MSG_DONE &&
4357 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)) {
4358 /* server-close: terminate this server connection and
4359 * reinitialize a fresh-new transaction.
4360 */
4361 http_end_txn_clean_session(s);
4362 }
4363
4364 http_silent_debug(__LINE__, s);
4365 return txn->req.msg_state != old_req_state ||
4366 txn->rsp.msg_state != old_res_state;
4367}
4368
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4369/* This function is an analyser which forwards request body (including chunk
4370 * sizes if any). It is called as soon as we must forward, even if we forward
4371 * zero byte. The only situation where it must not be called is when we're in
4372 * tunnel mode and we want to forward till the close. It's used both to forward
4373 * remaining data and to resync after end of body. It expects the msg_state to
4374 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4375 * 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]4376 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4377 * bytes of pending data + the headers if not already done (between som and sov).
4378 * It eventually adjusts som to match sov after the data in between have been sent.
4379 */
4380int http_request_forward_body(struct session *s, struct buffer *req, int an_bit)
4381{
4382 struct http_txn *txn = &s->txn;
4383 struct http_msg *msg = &s->txn.req;
4384
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4385 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4386 return 0;
4387
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4388 if ((req->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
4389 ((req->flags & BF_SHUTW) && (req->to_forward || req->send_max))) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4390 /* Output closed while we were sending data. We must abort and
4391 * wake the other side up.
4392 */
4393 msg->msg_state = HTTP_MSG_ERROR;
4394 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4395 return 1;
4396 }
4397
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4398 /* in most states, we should abort in case of early close */
4399 buffer_auto_close(req);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4400
4401 /* Note that we don't have to send 100-continue back because we don't
4402 * need the data to complete our job, and it's up to the server to
4403 * decide whether to return 100, 417 or anything else in return of
4404 * an "Expect: 100-continue" header.
4405 */
4406
4407 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
4408 /* we have msg->col and msg->sov which both point to the first
4409 * byte of message body. msg->som still points to the beginning
4410 * of the message. We must save the body in req->lr because it
4411 * survives buffer re-alignments.
4412 */
4413 req->lr = req->data + msg->sov;
4414 if (txn->flags & TX_REQ_TE_CHNK)
4415 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4416 else {
4417 msg->msg_state = HTTP_MSG_DATA;
4418 }
4419 }
4420
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4421 while (1) {
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4422 int bytes;
4423
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4424 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4425 /* we may have some data pending */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4426 bytes = msg->sov - msg->som;
4427 if (msg->chunk_len || bytes) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4428 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4429 if (likely(bytes < 0)) /* sov may have wrapped at the end */
4430 bytes += req->size;
4431 msg->chunk_len += (unsigned int)bytes;
4432 msg->chunk_len -= buffer_forward(req, msg->chunk_len);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4433 }
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4434
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4435 if (msg->msg_state == HTTP_MSG_DATA) {
4436 /* must still forward */
4437 if (req->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4438 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4439
4440 /* nothing left to forward */
4441 if (txn->flags & TX_REQ_TE_CHNK)
4442 msg->msg_state = HTTP_MSG_DATA_CRLF;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4443 else
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4444 msg->msg_state = HTTP_MSG_DONE;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4445 }
4446 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]4447 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4448 * set ->sov and ->lr to point to the body and switch to DATA or
4449 * TRAILERS state.
4450 */
4451 int ret = http_parse_chunk_size(req, msg);
4452
4453 if (!ret)
4454 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4455 else if (ret < 0) {
4456 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4457 if (msg->err_pos >= 0)
4458 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, HTTP_MSG_CHUNK_SIZE, s->be);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4459 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4460 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4461 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4462 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4463 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
4464 /* we want the CRLF after the data */
4465 int ret;
4466
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]4467 req->lr = req->w + req->send_max;
4468 if (req->lr >= req->data + req->size)
4469 req->lr -= req->size;
4470
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4471 ret = http_skip_chunk_crlf(req, msg);
4472
4473 if (ret == 0)
4474 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4475 else if (ret < 0) {
4476 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4477 if (msg->err_pos >= 0)
4478 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, HTTP_MSG_DATA_CRLF, s->be);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4479 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4480 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4481 /* we're in MSG_CHUNK_SIZE now */
4482 }
4483 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
4484 int ret = http_forward_trailers(req, msg);
4485
4486 if (ret == 0)
4487 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4488 else if (ret < 0) {
4489 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4490 if (msg->err_pos >= 0)
4491 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, HTTP_MSG_TRAILERS, s->be);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4492 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4493 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4494 /* we're in HTTP_MSG_DONE now */
4495 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4496 else {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4497 int old_state = msg->msg_state;
4498
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4499 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4500 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4501 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
4502 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
4503 buffer_dont_close(req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4504 if (http_resync_states(s)) {
4505 /* some state changes occurred, maybe the analyser
4506 * was disabled too.
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]4507 */
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4508 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4509 if (req->flags & BF_SHUTW) {
4510 /* request errors are most likely due to
4511 * the server aborting the transfer.
4512 */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4513 goto aborted_xfer;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4514 }
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4515 if (msg->err_pos >= 0)
4516 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, old_state, s->be);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4517 goto return_bad_req;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4518 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4519 return 1;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4520 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4521
4522 /* If "option abortonclose" is set on the backend, we
4523 * want to monitor the client's connection and forward
4524 * any shutdown notification to the server, which will
4525 * decide whether to close or to go on processing the
4526 * request.
4527 */
4528 if (s->be->options & PR_O_ABRT_CLOSE) {
4529 buffer_auto_read(req);
4530 buffer_auto_close(req);
4531 }
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4532 else if (s->txn.meth == HTTP_METH_POST) {
4533 /* POST requests may require to read extra CRLF
4534 * sent by broken browsers and which could cause
4535 * an RST to be sent upon close on some systems
4536 * (eg: Linux).
4537 */
4538 buffer_auto_read(req);
4539 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4540
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4541 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4542 }
4543 }
4544
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4545 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4546 /* stop waiting for data if the input is closed before the end */
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4547 if (req->flags & BF_SHUTR) {
4548 if (!(s->flags & SN_ERR_MASK))
4549 s->flags |= SN_ERR_CLICL;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4550 if (!(s->flags & SN_FINST_MASK)) {
4551 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4552 s->flags |= SN_FINST_H;
4553 else
4554 s->flags |= SN_FINST_D;
4555 }
4556
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4557 s->fe->fe_counters.cli_aborts++;
4558 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4559 if (target_srv(&s->target))
4560 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4561
4562 goto return_bad_req_stats_ok;
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4563 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4564
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4565 /* waiting for the last bits to leave the buffer */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4566 if (req->flags & BF_SHUTW)
4567 goto aborted_xfer;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4568
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4569 /* When TE: chunked is used, we need to get there again to parse remaining
4570 * chunks even if the client has closed, so we don't want to set BF_DONTCLOSE.
4571 */
4572 if (txn->flags & TX_REQ_TE_CHNK)
4573 buffer_dont_close(req);
4574
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4575 /* We know that more data are expected, but we couldn't send more that
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]4576 * what we did. So we always set the BF_EXPECT_MORE flag so that the
4577 * system knows it must not set a PUSH on this first part. Interactive
4578 * modes are already handled by the stream sock layer.
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4579 */
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]4580 req->flags |= BF_EXPECT_MORE;
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4581
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4582 http_silent_debug(__LINE__, s);
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4583 return 0;
4584
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4585 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4586 s->fe->fe_counters.failed_req++;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4587 if (s->listener->counters)
4588 s->listener->counters->failed_req++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4589 return_bad_req_stats_ok:
4590 txn->req.msg_state = HTTP_MSG_ERROR;
4591 if (txn->status) {
4592 /* Note: we don't send any error if some data were already sent */
4593 stream_int_retnclose(req->prod, NULL);
4594 } else {
4595 txn->status = 400;
4596 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
4597 }
4598 req->analysers = 0;
4599 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]4600
4601 if (!(s->flags & SN_ERR_MASK))
4602 s->flags |= SN_ERR_PRXCOND;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4603 if (!(s->flags & SN_FINST_MASK)) {
4604 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4605 s->flags |= SN_FINST_H;
4606 else
4607 s->flags |= SN_FINST_D;
4608 }
4609 return 0;
4610
4611 aborted_xfer:
4612 txn->req.msg_state = HTTP_MSG_ERROR;
4613 if (txn->status) {
4614 /* Note: we don't send any error if some data were already sent */
4615 stream_int_retnclose(req->prod, NULL);
4616 } else {
4617 txn->status = 502;
4618 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_502));
4619 }
4620 req->analysers = 0;
4621 s->rep->analysers = 0; /* we're in data phase, we want to abort both directions */
4622
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4623 s->fe->fe_counters.srv_aborts++;
4624 s->be->be_counters.srv_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4625 if (target_srv(&s->target))
4626 target_srv(&s->target)->counters.srv_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4627
4628 if (!(s->flags & SN_ERR_MASK))
4629 s->flags |= SN_ERR_SRVCL;
4630 if (!(s->flags & SN_FINST_MASK)) {
4631 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4632 s->flags |= SN_FINST_H;
4633 else
4634 s->flags |= SN_FINST_D;
4635 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4636 return 0;
4637}
4638
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4639/* This stream analyser waits for a complete HTTP response. It returns 1 if the
4640 * processing can continue on next analysers, or zero if it either needs more
4641 * data or wants to immediately abort the response (eg: timeout, error, ...). It
4642 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
4643 * when it has nothing left to do, and may remove any analyser when it wants to
4644 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4645 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4646int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4647{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4648 struct http_txn *txn = &s->txn;
4649 struct http_msg *msg = &txn->rsp;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4650 struct hdr_ctx ctx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4651 int use_close_only;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4652 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4653 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]4654
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4655 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]4656 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4657 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4658 rep,
4659 rep->rex, rep->wex,
4660 rep->flags,
4661 rep->l,
4662 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]4663
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4664 /*
4665 * Now parse the partial (or complete) lines.
4666 * We will check the response syntax, and also join multi-line
4667 * headers. An index of all the lines will be elaborated while
4668 * parsing.
4669 *
4670 * For the parsing, we use a 28 states FSM.
4671 *
4672 * Here is the information we currently have :
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4673 * rep->data + msg->som = beginning of response
4674 * rep->data + msg->eoh = end of processed headers / start of current one
4675 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4676 * rep->lr = first non-visited byte
4677 * rep->r = end of data
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4678 * Once we reach MSG_BODY, rep->sol = rep->data + msg->som
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4679 */
4680
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4681 /* There's a protected area at the end of the buffer for rewriting
4682 * purposes. We don't want to start to parse the request if the
4683 * protected area is affected, because we may have to move processed
4684 * data later, which is much more complicated.
4685 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4686 if (rep->l && msg->msg_state < HTTP_MSG_ERROR) {
4687 if (unlikely((rep->flags & BF_FULL) ||
4688 rep->r < rep->lr ||
4689 rep->r > rep->data + rep->size - global.tune.maxrewrite)) {
4690 if (rep->send_max) {
4691 /* some data has still not left the buffer, wake us once that's done */
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4692 if (rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
4693 goto abort_response;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4694 buffer_dont_close(rep);
4695 rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
4696 return 0;
4697 }
4698 if (rep->l <= rep->size - global.tune.maxrewrite)
4699 http_buffer_heavy_realign(rep, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4700 }
4701
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4702 if (likely(rep->lr < rep->r))
4703 http_msg_analyzer(rep, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4704 }
4705
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4706 /* 1: we might have to print this header in debug mode */
4707 if (unlikely((global.mode & MODE_DEBUG) &&
4708 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]4709 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4710 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4711 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4712
Willy Tarreau663308b2010-06-07 14:06:08 +0200[diff] [blame]4713 sol = rep->data + msg->som;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]4714 eol = sol + msg->sl.st.l;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4715 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4716
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4717 sol += hdr_idx_first_pos(&txn->hdr_idx);
4718 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4719
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4720 while (cur_idx) {
4721 eol = sol + txn->hdr_idx.v[cur_idx].len;
4722 debug_hdr("srvhdr", s, sol, eol);
4723 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
4724 cur_idx = txn->hdr_idx.v[cur_idx].next;
4725 }
4726 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4727
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4728 /*
4729 * Now we quickly check if we have found a full valid response.
4730 * If not so, we check the FD and buffer states before leaving.
4731 * A full response is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4732 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4733 * responses are checked first.
4734 *
4735 * Depending on whether the client is still there or not, we
4736 * may send an error response back or not. Note that normally
4737 * we should only check for HTTP status there, and check I/O
4738 * errors somewhere else.
4739 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4740
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4741 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4742 /* Invalid response */
4743 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4744 /* we detected a parsing error. We want to archive this response
4745 * in the dedicated proxy area for later troubleshooting.
4746 */
4747 hdr_response_bad:
4748 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4749 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4750
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4751 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4752 if (target_srv(&s->target)) {
4753 target_srv(&s->target)->counters.failed_resp++;
4754 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_HDRRSP);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4755 }
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4756 abort_response:
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4757 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4758 rep->analysers = 0;
4759 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4760 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4761 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4762 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
4763
4764 if (!(s->flags & SN_ERR_MASK))
4765 s->flags |= SN_ERR_PRXCOND;
4766 if (!(s->flags & SN_FINST_MASK))
4767 s->flags |= SN_FINST_H;
4768
4769 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4770 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4771
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4772 /* too large response does not fit in buffer. */
4773 else if (rep->flags & BF_FULL) {
4774 goto hdr_response_bad;
4775 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4776
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4777 /* read error */
4778 else if (rep->flags & BF_READ_ERROR) {
4779 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4780 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4781
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4782 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4783 if (target_srv(&s->target)) {
4784 target_srv(&s->target)->counters.failed_resp++;
4785 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_READ_ERROR);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4786 }
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]4787
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4788 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4789 rep->analysers = 0;
4790 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4791 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4792 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4793 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4794
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4795 if (!(s->flags & SN_ERR_MASK))
4796 s->flags |= SN_ERR_SRVCL;
4797 if (!(s->flags & SN_FINST_MASK))
4798 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]4799 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4800 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4801
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4802 /* read timeout : return a 504 to the client. */
4803 else if (rep->flags & BF_READ_TIMEOUT) {
4804 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4805 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4806
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4807 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4808 if (target_srv(&s->target)) {
4809 target_srv(&s->target)->counters.failed_resp++;
4810 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4811 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4812
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4813 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4814 rep->analysers = 0;
4815 txn->status = 504;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4816 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4817 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4818 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4819
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4820 if (!(s->flags & SN_ERR_MASK))
4821 s->flags |= SN_ERR_SRVTO;
4822 if (!(s->flags & SN_FINST_MASK))
4823 s->flags |= SN_FINST_H;
4824 return 0;
4825 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]4826
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4827 /* close from server */
4828 else if (rep->flags & BF_SHUTR) {
4829 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4830 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4831
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4832 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4833 if (target_srv(&s->target)) {
4834 target_srv(&s->target)->counters.failed_resp++;
4835 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4836 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4837
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4838 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4839 rep->analysers = 0;
4840 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4841 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4842 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4843 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4844
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4845 if (!(s->flags & SN_ERR_MASK))
4846 s->flags |= SN_ERR_SRVCL;
4847 if (!(s->flags & SN_FINST_MASK))
4848 s->flags |= SN_FINST_H;
4849 return 0;
4850 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4851
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4852 /* write error to client (we don't send any message then) */
4853 else if (rep->flags & BF_WRITE_ERROR) {
4854 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4855 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe);
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4856
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4857 s->be->be_counters.failed_resp++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4858 rep->analysers = 0;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4859 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4860
4861 if (!(s->flags & SN_ERR_MASK))
4862 s->flags |= SN_ERR_CLICL;
4863 if (!(s->flags & SN_FINST_MASK))
4864 s->flags |= SN_FINST_H;
4865
4866 /* process_session() will take care of the error */
4867 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4868 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4869
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4870 buffer_dont_close(rep);
4871 return 0;
4872 }
4873
4874 /* More interesting part now : we know that we have a complete
4875 * response which at least looks like HTTP. We have an indicator
4876 * of each header's length, so we can parse them quickly.
4877 */
4878
4879 if (unlikely(msg->err_pos >= 0))
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4880 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4881
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4882 /*
4883 * 1: get the status code
4884 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4885 n = msg->sol[msg->sl.st.c] - '0';
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4886 if (n < 1 || n > 5)
4887 n = 0;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4888 /* when the client triggers a 4xx from the server, it's most often due
4889 * to a missing object or permission. These events should be tracked
4890 * because if they happen often, it may indicate a brute force or a
4891 * vulnerability scan.
4892 */
4893 if (n == 4)
4894 session_inc_http_err_ctr(s);
4895
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4896 if (target_srv(&s->target))
4897 target_srv(&s->target)->counters.p.http.rsp[n]++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4898
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4899 /* check if the response is HTTP/1.1 or above */
4900 if ((msg->sl.st.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4901 ((msg->sol[5] > '1') ||
4902 ((msg->sol[5] == '1') &&
4903 (msg->sol[7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4904 txn->flags |= TX_RES_VER_11;
4905
4906 /* "connection" has not been parsed yet */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4907 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]4908
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4909 /* transfer length unknown*/
4910 txn->flags &= ~TX_RES_XFER_LEN;
4911
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4912 txn->status = strl2ui(msg->sol + msg->sl.st.c, msg->sl.st.c_l);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4913
Willy Tarreau39650402010-03-15 19:44:39 +0100[diff] [blame]4914 /* Adjust server's health based on status code. Note: status codes 501
4915 * and 505 are triggered on demand by client request, so we must not
4916 * count them as server failures.
4917 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4918 if (target_srv(&s->target)) {
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4919 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4920 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_OK);
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4921 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4922 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_STS);
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4923 }
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4924
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4925 /*
4926 * 2: check for cacheability.
4927 */
4928
4929 switch (txn->status) {
4930 case 200:
4931 case 203:
4932 case 206:
4933 case 300:
4934 case 301:
4935 case 410:
4936 /* RFC2616 @13.4:
4937 * "A response received with a status code of
4938 * 200, 203, 206, 300, 301 or 410 MAY be stored
4939 * by a cache (...) unless a cache-control
4940 * directive prohibits caching."
4941 *
4942 * RFC2616 @9.5: POST method :
4943 * "Responses to this method are not cacheable,
4944 * unless the response includes appropriate
4945 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4946 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4947 if (likely(txn->meth != HTTP_METH_POST) &&
4948 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
4949 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4950 break;
4951 default:
4952 break;
4953 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4954
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4955 /*
4956 * 3: we may need to capture headers
4957 */
4958 s->logs.logwait &= ~LW_RESP;
4959 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4960 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4961 txn->rsp.cap, s->fe->rsp_cap);
4962
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4963 /* 4: determine the transfer-length.
4964 * According to RFC2616 #4.4, amended by the HTTPbis working group,
4965 * the presence of a message-body in a RESPONSE and its transfer length
4966 * must be determined that way :
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4967 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4968 * All responses to the HEAD request method MUST NOT include a
4969 * message-body, even though the presence of entity-header fields
4970 * might lead one to believe they do. All 1xx (informational), 204
4971 * (No Content), and 304 (Not Modified) responses MUST NOT include a
4972 * message-body. All other responses do include a message-body,
4973 * although it MAY be of zero length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4974 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4975 * 1. Any response which "MUST NOT" include a message-body (such as the
4976 * 1xx, 204 and 304 responses and any response to a HEAD request) is
4977 * always terminated by the first empty line after the header fields,
4978 * regardless of the entity-header fields present in the message.
4979 *
4980 * 2. If a Transfer-Encoding header field (Section 9.7) is present and
4981 * the "chunked" transfer-coding (Section 6.2) is used, the
4982 * transfer-length is defined by the use of this transfer-coding.
4983 * If a Transfer-Encoding header field is present and the "chunked"
4984 * transfer-coding is not present, the transfer-length is defined by
4985 * the sender closing the connection.
4986 *
4987 * 3. If a Content-Length header field is present, its decimal value in
4988 * OCTETs represents both the entity-length and the transfer-length.
4989 * If a message is received with both a Transfer-Encoding header
4990 * field and a Content-Length header field, the latter MUST be ignored.
4991 *
4992 * 4. If the message uses the media type "multipart/byteranges", and
4993 * the transfer-length is not otherwise specified, then this self-
4994 * delimiting media type defines the transfer-length. This media
4995 * type MUST NOT be used unless the sender knows that the recipient
4996 * can parse it; the presence in a request of a Range header with
4997 * multiple byte-range specifiers from a 1.1 client implies that the
4998 * client can parse multipart/byteranges responses.
4999 *
5000 * 5. By the server closing the connection.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5001 */
5002
5003 /* Skip parsing if no content length is possible. The response flags
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5004 * remain 0 as well as the chunk_len, which may or may not mirror
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5005 * the real header value, and we note that we know the response's length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5006 * FIXME: should we parse anyway and return an error on chunked encoding ?
5007 */
5008 if (txn->meth == HTTP_METH_HEAD ||
5009 (txn->status >= 100 && txn->status < 200) ||
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5010 txn->status == 204 || txn->status == 304) {
5011 txn->flags |= TX_RES_XFER_LEN;
5012 goto skip_content_length;
5013 }
5014
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5015 use_close_only = 0;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5016 ctx.idx = 0;
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]5017 while ((txn->flags & TX_RES_VER_11) &&
5018 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5019 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
5020 txn->flags |= (TX_RES_TE_CHNK | TX_RES_XFER_LEN);
5021 else if (txn->flags & TX_RES_TE_CHNK) {
5022 /* bad transfer-encoding (chunked followed by something else) */
5023 use_close_only = 1;
5024 txn->flags &= ~(TX_RES_TE_CHNK | TX_RES_XFER_LEN);
5025 break;
5026 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5027 }
5028
5029 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
5030 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5031 while (!(txn->flags & TX_RES_TE_CHNK) && !use_close_only &&
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5032 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
5033 signed long long cl;
5034
5035 if (!ctx.vlen)
5036 goto hdr_response_bad;
5037
5038 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
5039 goto hdr_response_bad; /* parse failure */
5040
5041 if (cl < 0)
5042 goto hdr_response_bad;
5043
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5044 if ((txn->flags & TX_RES_CNT_LEN) && (msg->chunk_len != cl))
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5045 goto hdr_response_bad; /* already specified, was different */
5046
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5047 txn->flags |= TX_RES_CNT_LEN | TX_RES_XFER_LEN;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5048 msg->body_len = msg->chunk_len = cl;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5049 }
5050
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5051 /* FIXME: we should also implement the multipart/byterange method.
5052 * For now on, we resort to close mode in this case (unknown length).
5053 */
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5054skip_content_length:
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5055
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5056 /* end of job, return OK */
5057 rep->analysers &= ~an_bit;
5058 rep->analyse_exp = TICK_ETERNITY;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]5059 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5060 return 1;
5061}
5062
5063/* This function performs all the processing enabled for the current response.
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5064 * It normally returns 1 unless it wants to break. It relies on buffers flags,
5065 * and updates t->rep->analysers. It might make sense to explode it into several
5066 * other functions. It works like process_request (see indications above).
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5067 */
5068int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
5069{
5070 struct http_txn *txn = &t->txn;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5071 struct http_msg *msg = &txn->rsp;
5072 struct proxy *cur_proxy;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]5073 struct cond_wordlist *wl;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5074
5075 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
5076 now_ms, __FUNCTION__,
5077 t,
5078 rep,
5079 rep->rex, rep->wex,
5080 rep->flags,
5081 rep->l,
5082 rep->analysers);
5083
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]5084 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5085 return 0;
5086
5087 rep->analysers &= ~an_bit;
5088 rep->analyse_exp = TICK_ETERNITY;
5089
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5090 /* Now we have to check if we need to modify the Connection header.
5091 * This is more difficult on the response than it is on the request,
5092 * because we can have two different HTTP versions and we don't know
5093 * how the client will interprete a response. For instance, let's say
5094 * that the client sends a keep-alive request in HTTP/1.0 and gets an
5095 * HTTP/1.1 response without any header. Maybe it will bound itself to
5096 * HTTP/1.0 because it only knows about it, and will consider the lack
5097 * of header as a close, or maybe it knows HTTP/1.1 and can consider
5098 * the lack of header as a keep-alive. Thus we will use two flags
5099 * indicating how a request MAY be understood by the client. In case
5100 * of multiple possibilities, we'll fix the header to be explicit. If
5101 * ambiguous cases such as both close and keepalive are seen, then we
5102 * will fall back to explicit close. Note that we won't take risks with
5103 * HTTP/1.0 clients which may not necessarily understand keep-alive.
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5104 * See doc/internals/connection-header.txt for the complete matrix.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5105 */
5106
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5107 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
5108 txn->status == 101)) {
5109 /* Either we've established an explicit tunnel, or we're
5110 * switching the protocol. In both cases, we're very unlikely
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5111 * to understand the next protocols. We have to switch to tunnel
5112 * mode, so that we transfer the request and responses then let
5113 * this protocol pass unmodified. When we later implement specific
5114 * parsers for such protocols, we'll want to check the Upgrade
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5115 * header which contains information about that protocol for
5116 * responses with status 101 (eg: see RFC2817 about TLS).
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5117 */
5118 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
5119 }
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5120 else if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) &&
5121 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN ||
5122 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE))) {
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5123 int to_del = 0;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5124
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5125 /* on unknown transfer length, we must close */
5126 if (!(txn->flags & TX_RES_XFER_LEN) &&
5127 (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
5128 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5129
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5130 /* now adjust header transformations depending on current state */
5131 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN ||
5132 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
5133 to_del |= 2; /* remove "keep-alive" on any response */
5134 if (!(txn->flags & TX_RES_VER_11))
5135 to_del |= 1; /* remove "close" for HTTP/1.0 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5136 }
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5137 else { /* SCL / KAL */
5138 to_del |= 1; /* remove "close" on any response */
5139 if ((txn->flags & (TX_RES_VER_11|TX_REQ_VER_11)) == (TX_RES_VER_11|TX_REQ_VER_11))
5140 to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5141 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5142
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5143 /* Parse and remove some headers from the connection header */
5144 http_parse_connection_header(txn, msg, rep, to_del);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5145
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5146 /* Some keep-alive responses are converted to Server-close if
5147 * the server wants to close.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5148 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5149 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) {
5150 if ((txn->flags & TX_HDR_CONN_CLO) ||
5151 (txn->flags & (TX_HDR_CONN_KAL|TX_RES_VER_11)) == 0)
5152 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5153 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5154 }
5155
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5156 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5157 /*
5158 * 3: we will have to evaluate the filters.
5159 * As opposed to version 1.2, now they will be evaluated in the
5160 * filters order and not in the header order. This means that
5161 * each filter has to be validated among all headers.
5162 *
5163 * Filters are tried with ->be first, then with ->fe if it is
5164 * different from ->be.
5165 */
5166
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5167 cur_proxy = t->be;
5168 while (1) {
5169 struct proxy *rule_set = cur_proxy;
5170
5171 /* try headers filters */
5172 if (rule_set->rsp_exp != NULL) {
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5173 if (apply_filters_to_response(t, rep, rule_set) < 0) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5174 return_bad_resp:
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5175 if (target_srv(&t->target)) {
5176 target_srv(&t->target)->counters.failed_resp++;
5177 health_adjust(target_srv(&t->target), HANA_STATUS_HTTP_RSP);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]5178 }
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5179 t->be->be_counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5180 return_srv_prx_502:
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]5181 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5182 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]5183 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]5184 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreau8e89b842009-10-18 23:56:35 +0200[diff] [blame]5185 stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5186 if (!(t->flags & SN_ERR_MASK))
5187 t->flags |= SN_ERR_PRXCOND;
5188 if (!(t->flags & SN_FINST_MASK))
5189 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]5190 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5191 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5192 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5193
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5194 /* has the response been denied ? */
5195 if (txn->flags & TX_SVDENY) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5196 if (target_srv(&t->target))
5197 target_srv(&t->target)->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5198
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5199 t->be->be_counters.denied_resp++;
5200 t->fe->fe_counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5201 if (t->listener->counters)
5202 t->listener->counters->denied_resp++;
5203
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5204 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]5205 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5206
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5207 /* add response headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]5208 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]5209 if (txn->status < 200)
5210 break;
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5211 if (wl->cond) {
5212 int ret = acl_exec_cond(wl->cond, px, t, txn, ACL_DIR_RTR);
5213 ret = acl_pass(ret);
5214 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
5215 ret = !ret;
5216 if (!ret)
5217 continue;
5218 }
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]5219 if (unlikely(http_header_add_tail(rep, &txn->rsp, &txn->hdr_idx, wl->s) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5220 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]5221 }
5222
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5223 /* check whether we're already working on the frontend */
5224 if (cur_proxy == t->fe)
5225 break;
5226 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5227 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5228
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5229 /*
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5230 * We may be facing a 100-continue response, in which case this
5231 * is not the right response, and we're waiting for the next one.
5232 * Let's allow this response to go to the client and wait for the
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5233 * next one.
5234 */
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5235 if (unlikely(txn->status == 100)) {
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5236 hdr_idx_init(&txn->hdr_idx);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5237 buffer_forward(rep, rep->lr - msg->sol);
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5238 msg->msg_state = HTTP_MSG_RPBEFORE;
5239 txn->status = 0;
5240 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
5241 return 1;
5242 }
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5243 else if (unlikely(txn->status < 200))
5244 goto skip_header_mangling;
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5245
5246 /* we don't have any 1xx status code now */
5247
5248 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5249 * 4: check for server cookie.
5250 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5251 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name ||
5252 (t->be->options & PR_O_CHK_CACHE))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5253 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5254
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5255
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5256 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5257 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5258 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5259 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5260 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5261
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5262 /*
5263 * 6: add server cookie in the response if needed
5264 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5265 if (target_srv(&t->target) && (t->be->options & PR_O_COOK_INS) &&
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]5266 !((txn->flags & TX_SCK_FOUND) && (t->be->options2 & PR_O2_COOK_PSV)) &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5267 (!(t->flags & SN_DIRECT) ||
5268 ((t->be->cookie_maxidle || txn->cookie_last_date) &&
5269 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
5270 (t->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
5271 (!t->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]5272 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) &&
5273 !(t->flags & SN_IGNORE_PRST)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5274 int len;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5275 /* the server is known, it's not the one the client requested, or the
5276 * cookie's last seen date needs to be refreshed. We have to
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5277 * insert a set-cookie here, except if we want to insert only on POST
5278 * requests and this one isn't. Note that servers which don't have cookies
5279 * (eg: some backup servers) will return a full cookie removal request.
5280 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5281 if (!target_srv(&t->target)->cookie) {
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5282 len = sprintf(trash,
5283 "Set-Cookie: %s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
5284 t->be->cookie_name);
5285 }
5286 else {
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5287 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]5288
5289 if (t->be->cookie_maxidle || t->be->cookie_maxlife) {
5290 /* emit last_date, which is mandatory */
5291 trash[len++] = COOKIE_DELIM_DATE;
5292 s30tob64((date.tv_sec+3) >> 2, trash + len); len += 5;
5293 if (t->be->cookie_maxlife) {
5294 /* emit first_date, which is either the original one or
5295 * the current date.
5296 */
5297 trash[len++] = COOKIE_DELIM_DATE;
5298 s30tob64(txn->cookie_first_date ?
5299 txn->cookie_first_date >> 2 :
5300 (date.tv_sec+3) >> 2, trash + len);
5301 len += 5;
5302 }
5303 }
5304 len += sprintf(trash + len, "; path=/");
5305 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5306
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5307 if (t->be->cookie_domain)
5308 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5309
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5310 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]5311 trash, len) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5312 goto return_bad_resp;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5313
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5314 txn->flags &= ~TX_SCK_MASK;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5315 if (target_srv(&t->target)->cookie && (t->flags & SN_DIRECT))
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5316 /* the server did not change, only the date was updated */
5317 txn->flags |= TX_SCK_UPDATED;
5318 else
5319 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5320
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5321 /* Here, we will tell an eventual cache on the client side that we don't
5322 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
5323 * Some caches understand the correct form: 'no-cache="set-cookie"', but
5324 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
5325 */
5326 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5327
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5328 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
5329
5330 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]5331 "Cache-control: private", 22) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5332 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5333 }
5334 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5335
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5336 /*
5337 * 7: check if result will be cacheable with a cookie.
5338 * We'll block the response if security checks have caught
5339 * nasty things such as a cacheable cookie.
5340 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5341 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
5342 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5343 (t->be->options & PR_O_CHK_CACHE)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5344
5345 /* we're in presence of a cacheable response containing
5346 * a set-cookie header. We'll block it as requested by
5347 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5348 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5349 if (target_srv(&t->target))
5350 target_srv(&t->target)->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5351
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5352 t->be->be_counters.denied_resp++;
5353 t->fe->fe_counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5354 if (t->listener->counters)
5355 t->listener->counters->denied_resp++;
5356
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5357 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5358 t->be->id, target_srv(&t->target) ? target_srv(&t->target)->id : "<dispatch>");
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5359 send_log(t->be, LOG_ALERT,
5360 "Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5361 t->be->id, target_srv(&t->target) ? target_srv(&t->target)->id : "<dispatch>");
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5362 goto return_srv_prx_502;
5363 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5364
5365 /*
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5366 * 8: adjust "Connection: close" or "Connection: keep-alive" if needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5367 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5368 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
5369 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE)) {
5370 unsigned int want_flags = 0;
5371
5372 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5373 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
5374 /* we want a keep-alive response here. Keep-alive header
5375 * required if either side is not 1.1.
5376 */
5377 if ((txn->flags & (TX_REQ_VER_11|TX_RES_VER_11)) != (TX_REQ_VER_11|TX_RES_VER_11))
5378 want_flags |= TX_CON_KAL_SET;
5379 }
5380 else {
5381 /* we want a close response here. Close header required if
5382 * the server is 1.1, regardless of the client.
5383 */
5384 if (txn->flags & TX_RES_VER_11)
5385 want_flags |= TX_CON_CLO_SET;
5386 }
5387
5388 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
5389 http_change_connection_header(txn, msg, rep, want_flags);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5390 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5391
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5392 skip_header_mangling:
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5393 if ((txn->flags & TX_RES_XFER_LEN) ||
5394 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5395 rep->analysers |= AN_RES_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]5396
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5397 /*************************************************************
5398 * OK, that's finished for the headers. We have done what we *
5399 * could. Let's switch to the DATA state. *
5400 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5401
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5402 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5403
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5404 /* if the user wants to log as soon as possible, without counting
5405 * bytes from the server, then this is the right moment. We have
5406 * to temporarily assign bytes_out to log what we currently have.
5407 */
5408 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
5409 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
5410 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]5411 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5412 t->logs.bytes_out = 0;
5413 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5414
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5415 /* Note: we must not try to cheat by jumping directly to DATA,
5416 * otherwise we would not let the client side wake up.
5417 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5418
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5419 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5420 }
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5421 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5422}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5423
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5424/* This function is an analyser which forwards response body (including chunk
5425 * sizes if any). It is called as soon as we must forward, even if we forward
5426 * zero byte. The only situation where it must not be called is when we're in
5427 * tunnel mode and we want to forward till the close. It's used both to forward
5428 * remaining data and to resync after end of body. It expects the msg_state to
5429 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
5430 * 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]5431 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5432 * bytes of pending data + the headers if not already done (between som and sov).
5433 * It eventually adjusts som to match sov after the data in between have been sent.
5434 */
5435int http_response_forward_body(struct session *s, struct buffer *res, int an_bit)
5436{
5437 struct http_txn *txn = &s->txn;
5438 struct http_msg *msg = &s->txn.rsp;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5439 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5440
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5441 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
5442 return 0;
5443
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5444 if ((res->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]5445 ((res->flags & BF_SHUTW) && (res->to_forward || res->send_max)) ||
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5446 !s->req->analysers) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5447 /* Output closed while we were sending data. We must abort and
5448 * wake the other side up.
5449 */
5450 msg->msg_state = HTTP_MSG_ERROR;
5451 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]5452 return 1;
5453 }
5454
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5455 /* in most states, we should abort in case of early close */
5456 buffer_auto_close(res);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5457
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5458 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
5459 /* we have msg->col and msg->sov which both point to the first
5460 * byte of message body. msg->som still points to the beginning
5461 * of the message. We must save the body in req->lr because it
5462 * survives buffer re-alignments.
5463 */
5464 res->lr = res->data + msg->sov;
5465 if (txn->flags & TX_RES_TE_CHNK)
5466 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
5467 else {
5468 msg->msg_state = HTTP_MSG_DATA;
5469 }
5470 }
5471
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5472 while (1) {
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5473 int bytes;
5474
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5475 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5476 /* we may have some data pending */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5477 bytes = msg->sov - msg->som;
5478 if (msg->chunk_len || bytes) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5479 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5480 if (likely(bytes < 0)) /* sov may have wrapped at the end */
5481 bytes += res->size;
5482 msg->chunk_len += (unsigned int)bytes;
5483 msg->chunk_len -= buffer_forward(res, msg->chunk_len);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5484 }
5485
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5486
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5487 if (msg->msg_state == HTTP_MSG_DATA) {
5488 /* must still forward */
5489 if (res->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5490 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5491
5492 /* nothing left to forward */
5493 if (txn->flags & TX_RES_TE_CHNK)
5494 msg->msg_state = HTTP_MSG_DATA_CRLF;
5495 else
5496 msg->msg_state = HTTP_MSG_DONE;
5497 }
5498 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5499 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5500 * set ->sov to point to the body and switch to DATA or TRAILERS state.
5501 */
5502 int ret = http_parse_chunk_size(res, msg);
5503
5504 if (!ret)
5505 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5506 else if (ret < 0) {
5507 if (msg->err_pos >= 0)
5508 http_capture_bad_message(&s->be->invalid_rep, s, res, msg, HTTP_MSG_CHUNK_SIZE, s->fe);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5509 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5510 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5511 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5512 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5513 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
5514 /* we want the CRLF after the data */
5515 int ret;
5516
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]5517 res->lr = res->w + res->send_max;
5518 if (res->lr >= res->data + res->size)
5519 res->lr -= res->size;
5520
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5521 ret = http_skip_chunk_crlf(res, msg);
5522
5523 if (!ret)
5524 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5525 else if (ret < 0) {
5526 if (msg->err_pos >= 0)
5527 http_capture_bad_message(&s->be->invalid_rep, s, res, msg, HTTP_MSG_DATA_CRLF, s->fe);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5528 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5529 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5530 /* we're in MSG_CHUNK_SIZE now */
5531 }
5532 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
5533 int ret = http_forward_trailers(res, msg);
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5534
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5535 if (ret == 0)
5536 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5537 else if (ret < 0) {
5538 if (msg->err_pos >= 0)
5539 http_capture_bad_message(&s->be->invalid_rep, s, res, msg, HTTP_MSG_TRAILERS, s->fe);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5540 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5541 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5542 /* we're in HTTP_MSG_DONE now */
5543 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5544 else {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5545 int old_state = msg->msg_state;
5546
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5547 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5548 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5549 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5550 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5551 buffer_dont_close(res);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5552 if (http_resync_states(s)) {
5553 http_silent_debug(__LINE__, s);
5554 /* some state changes occurred, maybe the analyser
5555 * was disabled too.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5556 */
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5557 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
5558 if (res->flags & BF_SHUTW) {
5559 /* response errors are most likely due to
5560 * the client aborting the transfer.
5561 */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5562 goto aborted_xfer;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5563 }
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5564 if (msg->err_pos >= 0)
5565 http_capture_bad_message(&s->be->invalid_rep, s, res, msg, old_state, s->fe);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5566 goto return_bad_res;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5567 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5568 return 1;
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5569 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5570 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5571 }
5572 }
5573
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5574 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5575 /* stop waiting for data if the input is closed before the end */
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5576 if (res->flags & BF_SHUTR) {
5577 if (!(s->flags & SN_ERR_MASK))
5578 s->flags |= SN_ERR_SRVCL;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5579 s->be->be_counters.srv_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5580 if (target_srv(&s->target))
5581 target_srv(&s->target)->counters.srv_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5582 goto return_bad_res_stats_ok;
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5583 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5584
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5585 if (res->flags & BF_SHUTW)
5586 goto aborted_xfer;
5587
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5588 /* we need to obey the req analyser, so if it leaves, we must too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5589 if (!s->req->analysers)
5590 goto return_bad_res;
5591
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5592 /* forward any pending data */
5593 bytes = msg->sov - msg->som;
5594 if (msg->chunk_len || bytes) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5595 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5596 if (likely(bytes < 0)) /* sov may have wrapped at the end */
5597 bytes += res->size;
5598 msg->chunk_len += (unsigned int)bytes;
5599 msg->chunk_len -= buffer_forward(res, msg->chunk_len);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5600 }
5601
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5602 /* When TE: chunked is used, we need to get there again to parse remaining
5603 * chunks even if the server has closed, so we don't want to set BF_DONTCLOSE.
5604 * Similarly, with keep-alive on the client side, we don't want to forward a
5605 * close.
5606 */
5607 if ((txn->flags & TX_RES_TE_CHNK) ||
5608 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5609 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5610 buffer_dont_close(res);
5611
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5612 /* We know that more data are expected, but we couldn't send more that
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]5613 * what we did. So we always set the BF_EXPECT_MORE flag so that the
5614 * system knows it must not set a PUSH on this first part. Interactive
5615 * modes are already handled by the stream sock layer.
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5616 */
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]5617 res->flags |= BF_EXPECT_MORE;
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5618
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5619 /* the session handler will take care of timeouts and errors */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5620 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5621 return 0;
5622
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5623 return_bad_res: /* let's centralize all bad responses */
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5624 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5625 if (target_srv(&s->target))
5626 target_srv(&s->target)->counters.failed_resp++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5627
5628 return_bad_res_stats_ok:
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5629 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]5630 /* don't send any error message as we're in the body */
5631 stream_int_retnclose(res->cons, NULL);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5632 res->analysers = 0;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5633 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]5634 if (target_srv(&s->target))
5635 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_HDRRSP);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5636
5637 if (!(s->flags & SN_ERR_MASK))
5638 s->flags |= SN_ERR_PRXCOND;
5639 if (!(s->flags & SN_FINST_MASK))
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5640 s->flags |= SN_FINST_D;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5641 return 0;
5642
5643 aborted_xfer:
5644 txn->rsp.msg_state = HTTP_MSG_ERROR;
5645 /* don't send any error message as we're in the body */
5646 stream_int_retnclose(res->cons, NULL);
5647 res->analysers = 0;
5648 s->req->analysers = 0; /* we're in data phase, we want to abort both directions */
5649
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5650 s->fe->fe_counters.cli_aborts++;
5651 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5652 if (target_srv(&s->target))
5653 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5654
5655 if (!(s->flags & SN_ERR_MASK))
5656 s->flags |= SN_ERR_CLICL;
5657 if (!(s->flags & SN_FINST_MASK))
5658 s->flags |= SN_FINST_D;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5659 return 0;
5660}
5661
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5662/* Iterate the same filter through all request headers.
5663 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5664 * Since it can manage the switch to another backend, it updates the per-proxy
5665 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5666 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5667int 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]5668{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5669 char term;
5670 char *cur_ptr, *cur_end, *cur_next;
5671 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5672 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5673 struct hdr_idx_elem *cur_hdr;
5674 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]5675
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5676 last_hdr = 0;
5677
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5678 cur_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5679 old_idx = 0;
5680
5681 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5682 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5683 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5684 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5685 (exp->action == ACT_ALLOW ||
5686 exp->action == ACT_DENY ||
5687 exp->action == ACT_TARPIT))
5688 return 0;
5689
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5690 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5691 if (!cur_idx)
5692 break;
5693
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5694 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5695 cur_ptr = cur_next;
5696 cur_end = cur_ptr + cur_hdr->len;
5697 cur_next = cur_end + cur_hdr->cr + 1;
5698
5699 /* Now we have one header between cur_ptr and cur_end,
5700 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5701 */
5702
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5703 /* The annoying part is that pattern matching needs
5704 * that we modify the contents to null-terminate all
5705 * strings before testing them.
5706 */
5707
5708 term = *cur_end;
5709 *cur_end = '\0';
5710
5711 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5712 switch (exp->action) {
5713 case ACT_SETBE:
5714 /* It is not possible to jump a second time.
5715 * FIXME: should we return an HTTP/500 here so that
5716 * the admin knows there's a problem ?
5717 */
5718 if (t->be != t->fe)
5719 break;
5720
5721 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5722 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5723 last_hdr = 1;
5724 break;
5725
5726 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5727 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5728 last_hdr = 1;
5729 break;
5730
5731 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5732 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5733 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5734
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5735 t->fe->fe_counters.denied_req++;
5736 if (t->fe != t->be)
5737 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5738 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5739 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5740
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5741 break;
5742
5743 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5744 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5745 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5746
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5747 t->fe->fe_counters.denied_req++;
5748 if (t->fe != t->be)
5749 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5750 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5751 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5752
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5753 break;
5754
5755 case ACT_REPLACE:
5756 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5757 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5758 /* FIXME: if the user adds a newline in the replacement, the
5759 * index will not be recalculated for now, and the new line
5760 * will not be counted as a new header.
5761 */
5762
5763 cur_end += delta;
5764 cur_next += delta;
5765 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5766 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5767 break;
5768
5769 case ACT_REMOVE:
5770 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
5771 cur_next += delta;
5772
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5773 http_msg_move_end(&txn->req, delta);
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5774 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5775 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5776 cur_hdr->len = 0;
5777 cur_end = NULL; /* null-term has been rewritten */
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]5778 cur_idx = old_idx;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5779 break;
5780
5781 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5782 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5783 if (cur_end)
5784 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5785
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5786 /* keep the link from this header to next one in case of later
5787 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5788 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5789 old_idx = cur_idx;
5790 }
5791 return 0;
5792}
5793
5794
5795/* Apply the filter to the request line.
5796 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5797 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5798 * Since it can manage the switch to another backend, it updates the per-proxy
5799 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5800 */
5801int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
5802{
5803 char term;
5804 char *cur_ptr, *cur_end;
5805 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5806 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5807 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5808
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5809
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5810 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5811 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5812 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5813 (exp->action == ACT_ALLOW ||
5814 exp->action == ACT_DENY ||
5815 exp->action == ACT_TARPIT))
5816 return 0;
5817 else if (exp->action == ACT_REMOVE)
5818 return 0;
5819
5820 done = 0;
5821
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5822 cur_ptr = txn->req.sol;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5823 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5824
5825 /* Now we have the request line between cur_ptr and cur_end */
5826
5827 /* The annoying part is that pattern matching needs
5828 * that we modify the contents to null-terminate all
5829 * strings before testing them.
5830 */
5831
5832 term = *cur_end;
5833 *cur_end = '\0';
5834
5835 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5836 switch (exp->action) {
5837 case ACT_SETBE:
5838 /* It is not possible to jump a second time.
5839 * FIXME: should we return an HTTP/500 here so that
5840 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5841 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5842 if (t->be != t->fe)
5843 break;
5844
5845 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5846 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5847 done = 1;
5848 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5849
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5850 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5851 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5852 done = 1;
5853 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5854
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5855 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5856 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5857
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5858 t->fe->fe_counters.denied_req++;
5859 if (t->fe != t->be)
5860 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5861 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5862 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5863
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5864 done = 1;
5865 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5866
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5867 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5868 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5869
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5870 t->fe->fe_counters.denied_req++;
5871 if (t->fe != t->be)
5872 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5873 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5874 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5875
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5876 done = 1;
5877 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5878
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5879 case ACT_REPLACE:
5880 *cur_end = term; /* restore the string terminator */
5881 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5882 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5883 /* FIXME: if the user adds a newline in the replacement, the
5884 * index will not be recalculated for now, and the new line
5885 * will not be counted as a new header.
5886 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5887
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5888 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5889 cur_end += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5890 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5891 HTTP_MSG_RQMETH,
5892 cur_ptr, cur_end + 1,
5893 NULL, NULL);
5894 if (unlikely(!cur_end))
5895 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5896
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5897 /* we have a full request and we know that we have either a CR
5898 * or an LF at <ptr>.
5899 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5900 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
5901 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]5902 /* there is no point trying this regex on headers */
5903 return 1;
5904 }
5905 }
5906 *cur_end = term; /* restore the string terminator */
5907 return done;
5908}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]5909
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5910
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5911
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5912/*
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5913 * 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]5914 * 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]5915 * unparsable request. Since it can manage the switch to another backend, it
5916 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5917 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5918int apply_filters_to_request(struct session *s, struct buffer *req, struct proxy *px)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5919{
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5920 struct http_txn *txn = &s->txn;
5921 struct hdr_exp *exp;
5922
5923 for (exp = px->req_exp; exp; exp = exp->next) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5924 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5925
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5926 /*
5927 * The interleaving of transformations and verdicts
5928 * makes it difficult to decide to continue or stop
5929 * the evaluation.
5930 */
5931
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5932 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
5933 break;
5934
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5935 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5936 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5937 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5938 continue;
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5939
5940 /* if this filter had a condition, evaluate it now and skip to
5941 * next filter if the condition does not match.
5942 */
5943 if (exp->cond) {
5944 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_REQ);
5945 ret = acl_pass(ret);
5946 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
5947 ret = !ret;
5948
5949 if (!ret)
5950 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5951 }
5952
5953 /* Apply the filter to the request line. */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5954 ret = apply_filter_to_req_line(s, req, exp);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5955 if (unlikely(ret < 0))
5956 return -1;
5957
5958 if (likely(ret == 0)) {
5959 /* The filter did not match the request, it can be
5960 * iterated through all headers.
5961 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5962 apply_filter_to_req_headers(s, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5963 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5964 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5965 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5966}
5967
5968
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5969
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5970/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5971 * Try to retrieve the server associated to the appsession.
5972 * If the server is found, it's assigned to the session.
5973 */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5974void manage_client_side_appsession(struct session *t, const char *buf, int len) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5975 struct http_txn *txn = &t->txn;
5976 appsess *asession = NULL;
5977 char *sessid_temp = NULL;
5978
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5979 if (len > t->be->appsession_len) {
5980 len = t->be->appsession_len;
5981 }
5982
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5983 if (t->be->options2 & PR_O2_AS_REQL) {
5984 /* request-learn option is enabled : store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5985 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5986 /* 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]5987 pool_free2(apools.sessid, txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5988 }
5989
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5990 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5991 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5992 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5993 return;
5994 }
5995
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5996 memcpy(txn->sessid, buf, len);
5997 txn->sessid[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5998 }
5999
6000 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
6001 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
6002 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
6003 return;
6004 }
6005
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6006 memcpy(sessid_temp, buf, len);
6007 sessid_temp[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6008
6009 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
6010 /* free previously allocated memory */
6011 pool_free2(apools.sessid, sessid_temp);
6012
6013 if (asession != NULL) {
6014 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
6015 if (!(t->be->options2 & PR_O2_AS_REQL))
6016 asession->request_count++;
6017
6018 if (asession->serverid != NULL) {
6019 struct server *srv = t->be->srv;
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]6020
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6021 while (srv) {
6022 if (strcmp(srv->id, asession->serverid) == 0) {
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]6023 if ((srv->state & SRV_RUNNING) ||
6024 (t->be->options & PR_O_PERSIST) ||
6025 (t->flags & SN_FORCE_PRST)) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6026 /* we found the server and it's usable */
6027 txn->flags &= ~TX_CK_MASK;
Willy Tarreau2a6d88d2010-01-24 13:10:43 +0100[diff] [blame]6028 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6029 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]6030 set_target_server(&t->target, srv);
Willy Tarreau664beb82011-03-10 11:38:29 +0100[diff] [blame]6031
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6032 break;
6033 } else {
6034 txn->flags &= ~TX_CK_MASK;
6035 txn->flags |= TX_CK_DOWN;
6036 }
6037 }
6038 srv = srv->next;
6039 }
6040 }
6041 }
6042}
6043
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6044/* Find the end of a cookie value contained between <s> and <e>. It works the
6045 * same way as with headers above except that the semi-colon also ends a token.
6046 * See RFC2965 for more information. Note that it requires a valid header to
6047 * return a valid result.
6048 */
6049char *find_cookie_value_end(char *s, const char *e)
6050{
6051 int quoted, qdpair;
6052
6053 quoted = qdpair = 0;
6054 for (; s < e; s++) {
6055 if (qdpair) qdpair = 0;
6056 else if (quoted) {
6057 if (*s == '\\') qdpair = 1;
6058 else if (*s == '"') quoted = 0;
6059 }
6060 else if (*s == '"') quoted = 1;
6061 else if (*s == ',' || *s == ';') return s;
6062 }
6063 return s;
6064}
6065
6066/* Delete a value in a header between delimiters <from> and <next> in buffer
6067 * <buf>. The number of characters displaced is returned, and the pointer to
6068 * the first delimiter is updated if required. The function tries as much as
6069 * possible to respect the following principles :
6070 * - replace <from> delimiter by the <next> one unless <from> points to a
6071 * colon, in which case <next> is simply removed
6072 * - set exactly one space character after the new first delimiter, unless
6073 * there are not enough characters in the block being moved to do so.
6074 * - remove unneeded spaces before the previous delimiter and after the new
6075 * one.
6076 *
6077 * It is the caller's responsibility to ensure that :
6078 * - <from> points to a valid delimiter or the colon ;
6079 * - <next> points to a valid delimiter or the final CR/LF ;
6080 * - there are non-space chars before <from> ;
6081 * - there is a CR/LF at or after <next>.
6082 */
6083int del_hdr_value(struct buffer *buf, char **from, char *next)
6084{
6085 char *prev = *from;
6086
6087 if (*prev == ':') {
6088 /* We're removing the first value, preserve the colon and add a
6089 * space if possible.
6090 */
6091 if (!http_is_crlf[(unsigned char)*next])
6092 next++;
6093 prev++;
6094 if (prev < next)
6095 *prev++ = ' ';
6096
6097 while (http_is_spht[(unsigned char)*next])
6098 next++;
6099 } else {
6100 /* Remove useless spaces before the old delimiter. */
6101 while (http_is_spht[(unsigned char)*(prev-1)])
6102 prev--;
6103 *from = prev;
6104
6105 /* copy the delimiter and if possible a space if we're
6106 * not at the end of the line.
6107 */
6108 if (!http_is_crlf[(unsigned char)*next]) {
6109 *prev++ = *next++;
6110 if (prev + 1 < next)
6111 *prev++ = ' ';
6112 while (http_is_spht[(unsigned char)*next])
6113 next++;
6114 }
6115 }
6116 return buffer_replace2(buf, prev, next, NULL, 0);
6117}
6118
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6119/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6120 * Manage client-side cookie. It can impact performance by about 2% so it is
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6121 * desirable to call it only when needed. This code is quite complex because
6122 * of the multiple very crappy and ambiguous syntaxes we have to support. it
6123 * highly recommended not to touch this part without a good reason !
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6124 */
6125void manage_client_side_cookies(struct session *t, struct buffer *req)
6126{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6127 struct http_txn *txn = &t->txn;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6128 int preserve_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6129 int cur_idx, old_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6130 char *hdr_beg, *hdr_end, *hdr_next, *del_from;
6131 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6132
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6133 /* Iterate through the headers, we start with the start line. */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]6134 old_idx = 0;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6135 hdr_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6136
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6137 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6138 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6139 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6140
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6141 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6142 hdr_beg = hdr_next;
6143 hdr_end = hdr_beg + cur_hdr->len;
6144 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6145
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6146 /* We have one full header between hdr_beg and hdr_end, and the
6147 * next header starts at hdr_next. We're only interested in
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6148 * "Cookie:" headers.
6149 */
6150
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6151 val = http_header_match2(hdr_beg, hdr_end, "Cookie", 6);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6152 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6153 old_idx = cur_idx;
6154 continue;
6155 }
6156
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6157 del_from = NULL; /* nothing to be deleted */
6158 preserve_hdr = 0; /* assume we may kill the whole header */
6159
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6160 /* Now look for cookies. Conforming to RFC2109, we have to support
6161 * attributes whose name begin with a '$', and associate them with
6162 * the right cookie, if we want to delete this cookie.
6163 * So there are 3 cases for each cookie read :
6164 * 1) it's a special attribute, beginning with a '$' : ignore it.
6165 * 2) it's a server id cookie that we *MAY* want to delete : save
6166 * some pointers on it (last semi-colon, beginning of cookie...)
6167 * 3) it's an application cookie : we *MAY* have to delete a previous
6168 * "special" cookie.
6169 * At the end of loop, if a "special" cookie remains, we may have to
6170 * remove it. If no application cookie persists in the header, we
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6171 * *MUST* delete it.
6172 *
6173 * Note: RFC2965 is unclear about the processing of spaces around
6174 * the equal sign in the ATTR=VALUE form. A careful inspection of
6175 * the RFC explicitly allows spaces before it, and not within the
6176 * tokens (attrs or values). An inspection of RFC2109 allows that
6177 * too but section 10.1.3 lets one think that spaces may be allowed
6178 * after the equal sign too, resulting in some (rare) buggy
6179 * implementations trying to do that. So let's do what servers do.
6180 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
6181 * allowed quoted strings in values, with any possible character
6182 * after a backslash, including control chars and delimitors, which
6183 * causes parsing to become ambiguous. Browsers also allow spaces
6184 * within values even without quotes.
6185 *
6186 * We have to keep multiple pointers in order to support cookie
6187 * removal at the beginning, middle or end of header without
6188 * corrupting the header. All of these headers are valid :
6189 *
6190 * Cookie:NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3\r\n
6191 * Cookie:NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3\r\n
6192 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
6193 * | | | | | | | | |
6194 * | | | | | | | | hdr_end <--+
6195 * | | | | | | | +--> next
6196 * | | | | | | +----> val_end
6197 * | | | | | +-----------> val_beg
6198 * | | | | +--------------> equal
6199 * | | | +----------------> att_end
6200 * | | +---------------------> att_beg
6201 * | +--------------------------> prev
6202 * +--------------------------------> hdr_beg
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6203 */
6204
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6205 for (prev = hdr_beg + 6; prev < hdr_end; prev = next) {
6206 /* Iterate through all cookies on this line */
6207
6208 /* find att_beg */
6209 att_beg = prev + 1;
6210 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6211 att_beg++;
6212
6213 /* find att_end : this is the first character after the last non
6214 * space before the equal. It may be equal to hdr_end.
6215 */
6216 equal = att_end = att_beg;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6217
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6218 while (equal < hdr_end) {
6219 if (*equal == '=' || *equal == ',' || *equal == ';')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6220 break;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6221 if (http_is_spht[(unsigned char)*equal++])
6222 continue;
6223 att_end = equal;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6224 }
6225
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6226 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6227 * is between <att_beg> and <equal>, both may be identical.
6228 */
6229
6230 /* look for end of cookie if there is an equal sign */
6231 if (equal < hdr_end && *equal == '=') {
6232 /* look for the beginning of the value */
6233 val_beg = equal + 1;
6234 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6235 val_beg++;
6236
6237 /* find the end of the value, respecting quotes */
6238 next = find_cookie_value_end(val_beg, hdr_end);
6239
6240 /* make val_end point to the first white space or delimitor after the value */
6241 val_end = next;
6242 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6243 val_end--;
6244 } else {
6245 val_beg = val_end = next = equal;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6246 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6247
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6248 /* We have nothing to do with attributes beginning with '$'. However,
6249 * they will automatically be removed if a header before them is removed,
6250 * since they're supposed to be linked together.
6251 */
6252 if (*att_beg == '$')
6253 continue;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6254
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6255 /* Ignore cookies with no equal sign */
6256 if (equal == next) {
6257 /* This is not our cookie, so we must preserve it. But if we already
6258 * scheduled another cookie for removal, we cannot remove the
6259 * complete header, but we can remove the previous block itself.
6260 */
6261 preserve_hdr = 1;
6262 if (del_from != NULL) {
6263 int delta = del_hdr_value(req, &del_from, prev);
6264 val_end += delta;
6265 next += delta;
6266 hdr_end += delta;
6267 hdr_next += delta;
6268 cur_hdr->len += delta;
6269 http_msg_move_end(&txn->req, delta);
6270 prev = del_from;
6271 del_from = NULL;
6272 }
6273 continue;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6274 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6275
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6276 /* if there are spaces around the equal sign, we need to
6277 * strip them otherwise we'll get trouble for cookie captures,
6278 * or even for rewrites. Since this happens extremely rarely,
6279 * it does not hurt performance.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6280 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6281 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6282 int stripped_before = 0;
6283 int stripped_after = 0;
6284
6285 if (att_end != equal) {
6286 stripped_before = buffer_replace2(req, att_end, equal, NULL, 0);
6287 equal += stripped_before;
6288 val_beg += stripped_before;
6289 }
6290
6291 if (val_beg > equal + 1) {
6292 stripped_after = buffer_replace2(req, equal + 1, val_beg, NULL, 0);
6293 val_beg += stripped_after;
6294 stripped_before += stripped_after;
6295 }
6296
6297 val_end += stripped_before;
6298 next += stripped_before;
6299 hdr_end += stripped_before;
6300 hdr_next += stripped_before;
6301 cur_hdr->len += stripped_before;
6302 http_msg_move_end(&txn->req, stripped_before);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6303 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6304 /* now everything is as on the diagram above */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6305
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6306 /* First, let's see if we want to capture this cookie. We check
6307 * that we don't already have a client side cookie, because we
6308 * can only capture one. Also as an optimisation, we ignore
6309 * cookies shorter than the declared name.
6310 */
6311 if (t->fe->capture_name != NULL && txn->cli_cookie == NULL &&
6312 (val_end - att_beg >= t->fe->capture_namelen) &&
6313 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6314 int log_len = val_end - att_beg;
6315
6316 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
6317 Alert("HTTP logging : out of memory.\n");
6318 } else {
6319 if (log_len > t->fe->capture_len)
6320 log_len = t->fe->capture_len;
6321 memcpy(txn->cli_cookie, att_beg, log_len);
6322 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6323 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6324 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6325
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6326 /* Persistence cookies in passive, rewrite or insert mode have the
6327 * following form :
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6328 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6329 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6330 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6331 * For cookies in prefix mode, the form is :
6332 *
6333 * Cookie: NAME=SRV~VALUE
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6334 */
6335 if ((att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6336 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
6337 struct server *srv = t->be->srv;
6338 char *delim;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6339
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6340 /* if we're in cookie prefix mode, we'll search the delimitor so that we
6341 * have the server ID between val_beg and delim, and the original cookie between
6342 * delim+1 and val_end. Otherwise, delim==val_end :
6343 *
6344 * Cookie: NAME=SRV; # in all but prefix modes
6345 * Cookie: NAME=SRV~OPAQUE ; # in prefix mode
6346 * | || || | |+-> next
6347 * | || || | +--> val_end
6348 * | || || +---------> delim
6349 * | || |+------------> val_beg
6350 * | || +-------------> att_end = equal
6351 * | |+-----------------> att_beg
6352 * | +------------------> prev
6353 * +-------------------------> hdr_beg
6354 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6355
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6356 if (t->be->options & PR_O_COOK_PFX) {
6357 for (delim = val_beg; delim < val_end; delim++)
6358 if (*delim == COOKIE_DELIM)
6359 break;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6360 } else {
6361 char *vbar1;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6362 delim = val_end;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6363 /* Now check if the cookie contains a date field, which would
6364 * appear after a vertical bar ('|') just after the server name
6365 * and before the delimiter.
6366 */
6367 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
6368 if (vbar1) {
6369 /* OK, so left of the bar is the server's cookie and
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6370 * right is the last seen date. It is a base64 encoded
6371 * 30-bit value representing the UNIX date since the
6372 * epoch in 4-second quantities.
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6373 */
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6374 int val;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6375 delim = vbar1++;
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6376 if (val_end - vbar1 >= 5) {
6377 val = b64tos30(vbar1);
6378 if (val > 0)
6379 txn->cookie_last_date = val << 2;
6380 }
6381 /* look for a second vertical bar */
6382 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
6383 if (vbar1 && (val_end - vbar1 > 5)) {
6384 val = b64tos30(vbar1 + 1);
6385 if (val > 0)
6386 txn->cookie_first_date = val << 2;
6387 }
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6388 }
6389 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6390
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6391 /* if the cookie has an expiration date and the proxy wants to check
6392 * it, then we do that now. We first check if the cookie is too old,
6393 * then only if it has expired. We detect strict overflow because the
6394 * time resolution here is not great (4 seconds). Cookies with dates
6395 * in the future are ignored if their offset is beyond one day. This
6396 * allows an admin to fix timezone issues without expiring everyone
6397 * and at the same time avoids keeping unwanted side effects for too
6398 * long.
6399 */
6400 if (txn->cookie_first_date && t->be->cookie_maxlife &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6401 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)t->be->cookie_maxlife) ||
6402 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6403 txn->flags &= ~TX_CK_MASK;
6404 txn->flags |= TX_CK_OLD;
6405 delim = val_beg; // let's pretend we have not found the cookie
6406 txn->cookie_first_date = 0;
6407 txn->cookie_last_date = 0;
6408 }
6409 else if (txn->cookie_last_date && t->be->cookie_maxidle &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6410 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)t->be->cookie_maxidle) ||
6411 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6412 txn->flags &= ~TX_CK_MASK;
6413 txn->flags |= TX_CK_EXPIRED;
6414 delim = val_beg; // let's pretend we have not found the cookie
6415 txn->cookie_first_date = 0;
6416 txn->cookie_last_date = 0;
6417 }
6418
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6419 /* Here, we'll look for the first running server which supports the cookie.
6420 * This allows to share a same cookie between several servers, for example
6421 * to dedicate backup servers to specific servers only.
6422 * However, to prevent clients from sticking to cookie-less backup server
6423 * when they have incidentely learned an empty cookie, we simply ignore
6424 * empty cookies and mark them as invalid.
6425 * The same behaviour is applied when persistence must be ignored.
6426 */
6427 if ((delim == val_beg) || (t->flags & SN_IGNORE_PRST))
6428 srv = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6429
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6430 while (srv) {
6431 if (srv->cookie && (srv->cklen == delim - val_beg) &&
6432 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
6433 if ((srv->state & SRV_RUNNING) ||
6434 (t->be->options & PR_O_PERSIST) ||
6435 (t->flags & SN_FORCE_PRST)) {
6436 /* we found the server and we can use it */
6437 txn->flags &= ~TX_CK_MASK;
6438 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
6439 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]6440 set_target_server(&t->target, srv);
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6441 break;
6442 } else {
6443 /* we found a server, but it's down,
6444 * mark it as such and go on in case
6445 * another one is available.
6446 */
6447 txn->flags &= ~TX_CK_MASK;
6448 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6449 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6450 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6451 srv = srv->next;
6452 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6453
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6454 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6455 /* no server matched this cookie */
6456 txn->flags &= ~TX_CK_MASK;
6457 txn->flags |= TX_CK_INVALID;
6458 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6459
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6460 /* depending on the cookie mode, we may have to either :
6461 * - delete the complete cookie if we're in insert+indirect mode, so that
6462 * the server never sees it ;
6463 * - remove the server id from the cookie value, and tag the cookie as an
6464 * application cookie so that it does not get accidentely removed later,
6465 * if we're in cookie prefix mode
6466 */
6467 if ((t->be->options & PR_O_COOK_PFX) && (delim != val_end)) {
6468 int delta; /* negative */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6469
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6470 delta = buffer_replace2(req, val_beg, delim + 1, NULL, 0);
6471 val_end += delta;
6472 next += delta;
6473 hdr_end += delta;
6474 hdr_next += delta;
6475 cur_hdr->len += delta;
6476 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6477
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6478 del_from = NULL;
6479 preserve_hdr = 1; /* we want to keep this cookie */
6480 }
6481 else if (del_from == NULL &&
6482 (t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) {
6483 del_from = prev;
6484 }
6485 } else {
6486 /* This is not our cookie, so we must preserve it. But if we already
6487 * scheduled another cookie for removal, we cannot remove the
6488 * complete header, but we can remove the previous block itself.
6489 */
6490 preserve_hdr = 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6491
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6492 if (del_from != NULL) {
6493 int delta = del_hdr_value(req, &del_from, prev);
Willy Tarreaub8105542010-11-24 18:31:28 +0100[diff] [blame]6494 if (att_beg >= del_from)
6495 att_beg += delta;
6496 if (att_end >= del_from)
6497 att_end += delta;
6498 val_beg += delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6499 val_end += delta;
6500 next += delta;
6501 hdr_end += delta;
6502 hdr_next += delta;
6503 cur_hdr->len += delta;
6504 http_msg_move_end(&txn->req, delta);
6505 prev = del_from;
6506 del_from = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6507 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6508 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6509
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6510 /* Look for the appsession cookie unless persistence must be ignored */
6511 if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
6512 int cmp_len, value_len;
6513 char *value_begin;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]6514
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6515 if (t->be->options2 & PR_O2_AS_PFX) {
6516 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6517 value_begin = att_beg + t->be->appsession_name_len;
6518 value_len = val_end - att_beg - t->be->appsession_name_len;
6519 } else {
6520 cmp_len = att_end - att_beg;
6521 value_begin = val_beg;
6522 value_len = val_end - val_beg;
6523 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6524
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6525 /* let's see if the cookie is our appcookie */
6526 if (cmp_len == t->be->appsession_name_len &&
6527 memcmp(att_beg, t->be->appsession_name, cmp_len) == 0) {
6528 manage_client_side_appsession(t, value_begin, value_len);
6529 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6530 }
6531
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6532 /* continue with next cookie on this header line */
6533 att_beg = next;
6534 } /* for each cookie */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6535
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6536 /* There are no more cookies on this line.
6537 * We may still have one (or several) marked for deletion at the
6538 * end of the line. We must do this now in two ways :
6539 * - if some cookies must be preserved, we only delete from the
6540 * mark to the end of line ;
6541 * - if nothing needs to be preserved, simply delete the whole header
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6542 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6543 if (del_from) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6544 int delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6545 if (preserve_hdr) {
6546 delta = del_hdr_value(req, &del_from, hdr_end);
6547 hdr_end = del_from;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6548 cur_hdr->len += delta;
6549 } else {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6550 delta = buffer_replace2(req, hdr_beg, hdr_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6551
6552 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6553 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6554 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6555 cur_hdr->len = 0;
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]6556 cur_idx = old_idx;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6557 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6558 hdr_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6559 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6560 }
6561
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6562 /* check next header */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6563 old_idx = cur_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6564 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6565}
6566
6567
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6568/* Iterate the same filter through all response headers contained in <rtr>.
6569 * Returns 1 if this filter can be stopped upon return, otherwise 0.
6570 */
6571int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6572{
6573 char term;
6574 char *cur_ptr, *cur_end, *cur_next;
6575 int cur_idx, old_idx, last_hdr;
6576 struct http_txn *txn = &t->txn;
6577 struct hdr_idx_elem *cur_hdr;
6578 int len, delta;
6579
6580 last_hdr = 0;
6581
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6582 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6583 old_idx = 0;
6584
6585 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6586 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6587 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6588 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6589 (exp->action == ACT_ALLOW ||
6590 exp->action == ACT_DENY))
6591 return 0;
6592
6593 cur_idx = txn->hdr_idx.v[old_idx].next;
6594 if (!cur_idx)
6595 break;
6596
6597 cur_hdr = &txn->hdr_idx.v[cur_idx];
6598 cur_ptr = cur_next;
6599 cur_end = cur_ptr + cur_hdr->len;
6600 cur_next = cur_end + cur_hdr->cr + 1;
6601
6602 /* Now we have one header between cur_ptr and cur_end,
6603 * and the next header starts at cur_next.
6604 */
6605
6606 /* The annoying part is that pattern matching needs
6607 * that we modify the contents to null-terminate all
6608 * strings before testing them.
6609 */
6610
6611 term = *cur_end;
6612 *cur_end = '\0';
6613
6614 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6615 switch (exp->action) {
6616 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6617 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6618 last_hdr = 1;
6619 break;
6620
6621 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6622 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6623 last_hdr = 1;
6624 break;
6625
6626 case ACT_REPLACE:
6627 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6628 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6629 /* FIXME: if the user adds a newline in the replacement, the
6630 * index will not be recalculated for now, and the new line
6631 * will not be counted as a new header.
6632 */
6633
6634 cur_end += delta;
6635 cur_next += delta;
6636 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6637 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6638 break;
6639
6640 case ACT_REMOVE:
6641 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
6642 cur_next += delta;
6643
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6644 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6645 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6646 txn->hdr_idx.used--;
6647 cur_hdr->len = 0;
6648 cur_end = NULL; /* null-term has been rewritten */
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]6649 cur_idx = old_idx;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6650 break;
6651
6652 }
6653 }
6654 if (cur_end)
6655 *cur_end = term; /* restore the string terminator */
6656
6657 /* keep the link from this header to next one in case of later
6658 * removal of next header.
6659 */
6660 old_idx = cur_idx;
6661 }
6662 return 0;
6663}
6664
6665
6666/* Apply the filter to the status line in the response buffer <rtr>.
6667 * Returns 0 if nothing has been done, 1 if the filter has been applied,
6668 * or -1 if a replacement resulted in an invalid status line.
6669 */
6670int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6671{
6672 char term;
6673 char *cur_ptr, *cur_end;
6674 int done;
6675 struct http_txn *txn = &t->txn;
6676 int len, delta;
6677
6678
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6679 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6680 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6681 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6682 (exp->action == ACT_ALLOW ||
6683 exp->action == ACT_DENY))
6684 return 0;
6685 else if (exp->action == ACT_REMOVE)
6686 return 0;
6687
6688 done = 0;
6689
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6690 cur_ptr = txn->rsp.sol;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]6691 cur_end = cur_ptr + txn->rsp.sl.st.l;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6692
6693 /* Now we have the status line between cur_ptr and cur_end */
6694
6695 /* The annoying part is that pattern matching needs
6696 * that we modify the contents to null-terminate all
6697 * strings before testing them.
6698 */
6699
6700 term = *cur_end;
6701 *cur_end = '\0';
6702
6703 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6704 switch (exp->action) {
6705 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6706 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6707 done = 1;
6708 break;
6709
6710 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6711 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6712 done = 1;
6713 break;
6714
6715 case ACT_REPLACE:
6716 *cur_end = term; /* restore the string terminator */
6717 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6718 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6719 /* FIXME: if the user adds a newline in the replacement, the
6720 * index will not be recalculated for now, and the new line
6721 * will not be counted as a new header.
6722 */
6723
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6724 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6725 cur_end += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6726 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]6727 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6728 cur_ptr, cur_end + 1,
6729 NULL, NULL);
6730 if (unlikely(!cur_end))
6731 return -1;
6732
6733 /* we have a full respnse and we know that we have either a CR
6734 * or an LF at <ptr>.
6735 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6736 txn->status = strl2ui(txn->rsp.sol + txn->rsp.sl.st.c, txn->rsp.sl.st.c_l);
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]6737 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]6738 /* there is no point trying this regex on headers */
6739 return 1;
6740 }
6741 }
6742 *cur_end = term; /* restore the string terminator */
6743 return done;
6744}
6745
6746
6747
6748/*
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6749 * 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]6750 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
6751 * unparsable response.
6752 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6753int apply_filters_to_response(struct session *s, struct buffer *rtr, struct proxy *px)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6754{
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6755 struct http_txn *txn = &s->txn;
6756 struct hdr_exp *exp;
6757
6758 for (exp = px->rsp_exp; exp; exp = exp->next) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6759 int ret;
6760
6761 /*
6762 * The interleaving of transformations and verdicts
6763 * makes it difficult to decide to continue or stop
6764 * the evaluation.
6765 */
6766
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6767 if (txn->flags & TX_SVDENY)
6768 break;
6769
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6770 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6771 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
6772 exp->action == ACT_PASS)) {
6773 exp = exp->next;
6774 continue;
6775 }
6776
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6777 /* if this filter had a condition, evaluate it now and skip to
6778 * next filter if the condition does not match.
6779 */
6780 if (exp->cond) {
6781 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_RTR);
6782 ret = acl_pass(ret);
6783 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
6784 ret = !ret;
6785 if (!ret)
6786 continue;
6787 }
6788
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6789 /* Apply the filter to the status line. */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6790 ret = apply_filter_to_sts_line(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6791 if (unlikely(ret < 0))
6792 return -1;
6793
6794 if (likely(ret == 0)) {
6795 /* The filter did not match the response, it can be
6796 * iterated through all headers.
6797 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6798 apply_filter_to_resp_headers(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6799 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6800 }
6801 return 0;
6802}
6803
6804
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6805/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6806 * Manage server-side cookies. It can impact performance by about 2% so it is
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6807 * desirable to call it only when needed. This function is also used when we
6808 * just need to know if there is a cookie (eg: for check-cache).
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6809 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6810void manage_server_side_cookies(struct session *t, struct buffer *res)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6811{
6812 struct http_txn *txn = &t->txn;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6813 struct server *srv;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6814 int is_cookie2;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6815 int cur_idx, old_idx, delta;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6816 char *hdr_beg, *hdr_end, *hdr_next;
6817 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6818
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6819 /* Iterate through the headers.
6820 * we start with the start line.
6821 */
6822 old_idx = 0;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6823 hdr_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6824
6825 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
6826 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6827 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6828
6829 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6830 hdr_beg = hdr_next;
6831 hdr_end = hdr_beg + cur_hdr->len;
6832 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6833
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6834 /* We have one full header between hdr_beg and hdr_end, and the
6835 * next header starts at hdr_next. We're only interested in
6836 * "Set-Cookie" and "Set-Cookie2" headers.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6837 */
6838
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6839 is_cookie2 = 0;
6840 prev = hdr_beg + 10;
6841 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie", 10);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6842 if (!val) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6843 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie2", 11);
6844 if (!val) {
6845 old_idx = cur_idx;
6846 continue;
6847 }
6848 is_cookie2 = 1;
6849 prev = hdr_beg + 11;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6850 }
6851
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6852 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
6853 * <prev> points to the colon.
6854 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6855 txn->flags |= TX_SCK_PRESENT;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6856
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6857 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
6858 * check-cache is enabled) and we are not interested in checking
6859 * them. Warning, the cookie capture is declared in the frontend.
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6860 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6861 if (t->be->cookie_name == NULL &&
6862 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6863 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6864 return;
6865
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6866 /* OK so now we know we have to process this response cookie.
6867 * The format of the Set-Cookie header is slightly different
6868 * from the format of the Cookie header in that it does not
6869 * support the comma as a cookie delimiter (thus the header
6870 * cannot be folded) because the Expires attribute described in
6871 * the original Netscape's spec may contain an unquoted date
6872 * with a comma inside. We have to live with this because
6873 * many browsers don't support Max-Age and some browsers don't
6874 * support quoted strings. However the Set-Cookie2 header is
6875 * clean.
6876 *
6877 * We have to keep multiple pointers in order to support cookie
6878 * removal at the beginning, middle or end of header without
6879 * corrupting the header (in case of set-cookie2). A special
6880 * pointer, <scav> points to the beginning of the set-cookie-av
6881 * fields after the first semi-colon. The <next> pointer points
6882 * either to the end of line (set-cookie) or next unquoted comma
6883 * (set-cookie2). All of these headers are valid :
6884 *
6885 * Set-Cookie: NAME1 = VALUE 1 ; Secure; Path="/"\r\n
6886 * Set-Cookie:NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6887 * Set-Cookie: NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6888 * Set-Cookie2: NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard\r\n
6889 * | | | | | | | | | |
6890 * | | | | | | | | +-> next hdr_end <--+
6891 * | | | | | | | +------------> scav
6892 * | | | | | | +--------------> val_end
6893 * | | | | | +--------------------> val_beg
6894 * | | | | +----------------------> equal
6895 * | | | +------------------------> att_end
6896 * | | +----------------------------> att_beg
6897 * | +------------------------------> prev
6898 * +-----------------------------------------> hdr_beg
6899 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6900
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6901 for (; prev < hdr_end; prev = next) {
6902 /* Iterate through all cookies on this line */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6903
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6904 /* find att_beg */
6905 att_beg = prev + 1;
6906 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6907 att_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6908
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6909 /* find att_end : this is the first character after the last non
6910 * space before the equal. It may be equal to hdr_end.
6911 */
6912 equal = att_end = att_beg;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6913
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6914 while (equal < hdr_end) {
6915 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
6916 break;
6917 if (http_is_spht[(unsigned char)*equal++])
6918 continue;
6919 att_end = equal;
6920 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6921
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6922 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6923 * is between <att_beg> and <equal>, both may be identical.
6924 */
6925
6926 /* look for end of cookie if there is an equal sign */
6927 if (equal < hdr_end && *equal == '=') {
6928 /* look for the beginning of the value */
6929 val_beg = equal + 1;
6930 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6931 val_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6932
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6933 /* find the end of the value, respecting quotes */
6934 next = find_cookie_value_end(val_beg, hdr_end);
6935
6936 /* make val_end point to the first white space or delimitor after the value */
6937 val_end = next;
6938 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6939 val_end--;
6940 } else {
6941 /* <equal> points to next comma, semi-colon or EOL */
6942 val_beg = val_end = next = equal;
6943 }
6944
6945 if (next < hdr_end) {
6946 /* Set-Cookie2 supports multiple cookies, and <next> points to
6947 * a colon or semi-colon before the end. So skip all attr-value
6948 * pairs and look for the next comma. For Set-Cookie, since
6949 * commas are permitted in values, skip to the end.
6950 */
6951 if (is_cookie2)
6952 next = find_hdr_value_end(next, hdr_end);
6953 else
6954 next = hdr_end;
6955 }
6956
6957 /* Now everything is as on the diagram above */
6958
6959 /* Ignore cookies with no equal sign */
6960 if (equal == val_end)
6961 continue;
6962
6963 /* If there are spaces around the equal sign, we need to
6964 * strip them otherwise we'll get trouble for cookie captures,
6965 * or even for rewrites. Since this happens extremely rarely,
6966 * it does not hurt performance.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6967 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6968 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6969 int stripped_before = 0;
6970 int stripped_after = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6971
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6972 if (att_end != equal) {
6973 stripped_before = buffer_replace2(res, att_end, equal, NULL, 0);
6974 equal += stripped_before;
6975 val_beg += stripped_before;
6976 }
6977
6978 if (val_beg > equal + 1) {
6979 stripped_after = buffer_replace2(res, equal + 1, val_beg, NULL, 0);
6980 val_beg += stripped_after;
6981 stripped_before += stripped_after;
6982 }
6983
6984 val_end += stripped_before;
6985 next += stripped_before;
6986 hdr_end += stripped_before;
6987 hdr_next += stripped_before;
6988 cur_hdr->len += stripped_before;
Willy Tarreau1fc1f452011-04-07 22:35:37 +0200[diff] [blame]6989 http_msg_move_end(&txn->rsp, stripped_before);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6990 }
6991
6992 /* First, let's see if we want to capture this cookie. We check
6993 * that we don't already have a server side cookie, because we
6994 * can only capture one. Also as an optimisation, we ignore
6995 * cookies shorter than the declared name.
6996 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6997 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6998 txn->srv_cookie == NULL &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6999 (val_end - att_beg >= t->fe->capture_namelen) &&
7000 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
7001 int log_len = val_end - att_beg;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]7002 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7003 Alert("HTTP logging : out of memory.\n");
7004 }
Willy Tarreauf70fc752010-11-19 11:27:18 +0100[diff] [blame]7005 else {
7006 if (log_len > t->fe->capture_len)
7007 log_len = t->fe->capture_len;
7008 memcpy(txn->srv_cookie, att_beg, log_len);
7009 txn->srv_cookie[log_len] = 0;
7010 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7011 }
7012
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7013 srv = target_srv(&t->target);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7014 /* now check if we need to process it for persistence */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7015 if (!(t->flags & SN_IGNORE_PRST) &&
7016 (att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
7017 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7018 /* assume passive cookie by default */
7019 txn->flags &= ~TX_SCK_MASK;
7020 txn->flags |= TX_SCK_FOUND;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7021
7022 /* If the cookie is in insert mode on a known server, we'll delete
7023 * this occurrence because we'll insert another one later.
7024 * 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]7025 * a direct access.
7026 */
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]7027 if (t->be->options2 & PR_O2_COOK_PSV) {
7028 /* The "preserve" flag was set, we don't want to touch the
7029 * server's cookie.
7030 */
7031 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7032 else if ((srv && (t->be->options & PR_O_COOK_INS)) ||
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]7033 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7034 /* this cookie must be deleted */
7035 if (*prev == ':' && next == hdr_end) {
7036 /* whole header */
7037 delta = buffer_replace2(res, hdr_beg, hdr_next, NULL, 0);
7038 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
7039 txn->hdr_idx.used--;
7040 cur_hdr->len = 0;
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]7041 cur_idx = old_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7042 hdr_next += delta;
7043 http_msg_move_end(&txn->rsp, delta);
7044 /* note: while both invalid now, <next> and <hdr_end>
7045 * are still equal, so the for() will stop as expected.
7046 */
7047 } else {
7048 /* just remove the value */
7049 int delta = del_hdr_value(res, &prev, next);
7050 next = prev;
7051 hdr_end += delta;
7052 hdr_next += delta;
7053 cur_hdr->len += delta;
7054 http_msg_move_end(&txn->rsp, delta);
7055 }
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7056 txn->flags &= ~TX_SCK_MASK;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7057 txn->flags |= TX_SCK_DELETED;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7058 /* and go on with next cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7059 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7060 else if (srv && srv->cookie && (t->be->options & PR_O_COOK_RW)) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7061 /* replace bytes val_beg->val_end with the cookie name associated
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7062 * with this server since we know it.
7063 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7064 delta = buffer_replace2(res, val_beg, val_end, srv->cookie, srv->cklen);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7065 next += delta;
7066 hdr_end += delta;
7067 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7068 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]7069 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7070
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7071 txn->flags &= ~TX_SCK_MASK;
7072 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7073 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7074 else if (srv && srv && (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7075 /* insert the cookie name associated with this server
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7076 * before existing cookie, and insert a delimiter between them..
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7077 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7078 delta = buffer_replace2(res, val_beg, val_beg, srv->cookie, srv->cklen + 1);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7079 next += delta;
7080 hdr_end += delta;
7081 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7082 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]7083 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7084
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7085 val_beg[srv->cklen] = COOKIE_DELIM;
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7086 txn->flags &= ~TX_SCK_MASK;
7087 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7088 }
7089 }
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]7090 /* next, let's see if the cookie is our appcookie, unless persistence must be ignored */
7091 else if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7092 int cmp_len, value_len;
7093 char *value_begin;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7094
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7095 if (t->be->options2 & PR_O2_AS_PFX) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7096 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
7097 value_begin = att_beg + t->be->appsession_name_len;
7098 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]7099 } else {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7100 cmp_len = att_end - att_beg;
7101 value_begin = val_beg;
7102 value_len = MIN(t->be->appsession_len, val_end - val_beg);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7103 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7104
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]7105 if ((cmp_len == t->be->appsession_name_len) &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7106 (memcmp(att_beg, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
7107 /* free a possibly previously allocated memory */
7108 pool_free2(apools.sessid, txn->sessid);
7109
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7110 /* Store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7111 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7112 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
7113 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
7114 return;
7115 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7116 memcpy(txn->sessid, value_begin, value_len);
7117 txn->sessid[value_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7118 }
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7119 }
7120 /* that's done for this cookie, check the next one on the same
7121 * line when next != hdr_end (only if is_cookie2).
7122 */
7123 }
7124 /* check next header */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7125 old_idx = cur_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7126 }
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7127
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7128 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7129 appsess *asession = NULL;
7130 /* only do insert, if lookup fails */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7131 asession = appsession_hash_lookup(&(t->be->htbl_proxy), txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7132 if (asession == NULL) {
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]7133 size_t server_id_len;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7134 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
7135 Alert("Not enough Memory process_srv():asession:calloc().\n");
7136 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
7137 return;
7138 }
Willy Tarreau77eb9b82010-11-19 11:29:06 +0100[diff] [blame]7139 asession->serverid = NULL; /* to avoid a double free in case of allocation error */
7140
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7141 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
7142 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
7143 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]7144 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7145 return;
7146 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7147 memcpy(asession->sessid, txn->sessid, t->be->appsession_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7148 asession->sessid[t->be->appsession_len] = 0;
7149
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7150 server_id_len = strlen(target_srv(&t->target)->id) + 1;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7151 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
Willy Tarreau77eb9b82010-11-19 11:29:06 +0100[diff] [blame]7152 Alert("Not enough Memory process_srv():asession->serverid:malloc().\n");
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7153 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]7154 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7155 return;
7156 }
7157 asession->serverid[0] = '\0';
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7158 memcpy(asession->serverid, target_srv(&t->target)->id, server_id_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7159
7160 asession->request_count = 0;
7161 appsession_hash_insert(&(t->be->htbl_proxy), asession);
7162 }
7163
7164 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
7165 asession->request_count++;
7166 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7167}
7168
7169
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7170/*
7171 * Check if response is cacheable or not. Updates t->flags.
7172 */
7173void check_response_for_cacheability(struct session *t, struct buffer *rtr)
7174{
7175 struct http_txn *txn = &t->txn;
7176 char *p1, *p2;
7177
7178 char *cur_ptr, *cur_end, *cur_next;
7179 int cur_idx;
7180
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]7181 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7182 return;
7183
7184 /* Iterate through the headers.
7185 * we start with the start line.
7186 */
7187 cur_idx = 0;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7188 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7189
7190 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
7191 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7192 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7193
7194 cur_hdr = &txn->hdr_idx.v[cur_idx];
7195 cur_ptr = cur_next;
7196 cur_end = cur_ptr + cur_hdr->len;
7197 cur_next = cur_end + cur_hdr->cr + 1;
7198
7199 /* We have one full header between cur_ptr and cur_end, and the
7200 * next header starts at cur_next. We're only interested in
7201 * "Cookie:" headers.
7202 */
7203
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7204 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
7205 if (val) {
7206 if ((cur_end - (cur_ptr + val) >= 8) &&
7207 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
7208 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
7209 return;
7210 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7211 }
7212
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7213 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
7214 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7215 continue;
7216
7217 /* OK, right now we know we have a cache-control header at cur_ptr */
7218
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7219 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7220
7221 if (p1 >= cur_end) /* no more info */
7222 continue;
7223
7224 /* p1 is at the beginning of the value */
7225 p2 = p1;
7226
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]7227 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7228 p2++;
7229
7230 /* we have a complete value between p1 and p2 */
7231 if (p2 < cur_end && *p2 == '=') {
7232 /* we have something of the form no-cache="set-cookie" */
7233 if ((cur_end - p1 >= 21) &&
7234 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
7235 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7236 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7237 continue;
7238 }
7239
7240 /* OK, so we know that either p2 points to the end of string or to a comma */
7241 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
7242 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
7243 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
7244 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7245 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7246 return;
7247 }
7248
7249 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7250 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7251 continue;
7252 }
7253 }
7254}
7255
7256
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7257/*
7258 * Try to retrieve a known appsession in the URI, then the associated server.
7259 * If the server is found, it's assigned to the session.
7260 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7261void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7262{
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7263 char *end_params, *first_param, *cur_param, *next_param;
7264 char separator;
7265 int value_len;
7266
7267 int mode = t->be->options2 & PR_O2_AS_M_ANY;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7268
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]7269 if (t->be->appsession_name == NULL ||
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]7270 (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]7271 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7272 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7273
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7274 first_param = NULL;
7275 switch (mode) {
7276 case PR_O2_AS_M_PP:
7277 first_param = memchr(begin, ';', len);
7278 break;
7279 case PR_O2_AS_M_QS:
7280 first_param = memchr(begin, '?', len);
7281 break;
7282 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7283
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7284 if (first_param == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7285 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7286 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7287
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7288 switch (mode) {
7289 case PR_O2_AS_M_PP:
7290 if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) {
7291 end_params = (char *) begin + len;
7292 }
7293 separator = ';';
7294 break;
7295 case PR_O2_AS_M_QS:
7296 end_params = (char *) begin + len;
7297 separator = '&';
7298 break;
7299 default:
7300 /* unknown mode, shouldn't happen */
7301 return;
7302 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7303
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7304 cur_param = next_param = end_params;
7305 while (cur_param > first_param) {
7306 cur_param--;
7307 if ((cur_param[0] == separator) || (cur_param == first_param)) {
7308 /* let's see if this is the appsession parameter */
7309 if ((cur_param + t->be->appsession_name_len + 1 < next_param) &&
7310 ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') &&
7311 (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
7312 /* Cool... it's the right one */
7313 cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2);
7314 value_len = MIN(t->be->appsession_len, next_param - cur_param);
7315 if (value_len > 0) {
7316 manage_client_side_appsession(t, cur_param, value_len);
7317 }
7318 break;
7319 }
7320 next_param = cur_param;
7321 }
7322 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7323#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]7324 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]7325 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7326#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7327}
7328
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7329/*
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7330 * 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]7331 * for the current backend.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7332 *
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7333 * 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]7334 * uri_auth field is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7335 *
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7336 * Returns 1 if stats should be provided, otherwise 0.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7337 */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7338int stats_check_uri(struct stream_interface *si, struct http_txn *txn, struct proxy *backend)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7339{
7340 struct uri_auth *uri_auth = backend->uri_auth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7341 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7342
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7343 if (!uri_auth)
7344 return 0;
7345
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7346 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]7347 return 0;
7348
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7349 memset(&si->applet.ctx.stats, 0, sizeof(si->applet.ctx.stats));
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7350
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7351 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]7352 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7353 return 0;
7354
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7355 h = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7356
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]7357 /* the URI is in h */
7358 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7359 return 0;
7360
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7361 h += uri_auth->uri_len;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7362 while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 3) {
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7363 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7364 si->applet.ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7365 break;
7366 }
7367 h++;
7368 }
7369
7370 if (uri_auth->refresh) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7371 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7372 while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 10) {
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7373 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7374 si->applet.ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7375 break;
7376 }
7377 h++;
7378 }
7379 }
7380
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7381 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7382 while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 4) {
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]7383 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7384 si->applet.ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]7385 break;
7386 }
7387 h++;
7388 }
7389
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7390 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7391 while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 8) {
7392 if (memcmp(h, ";st=", 4) == 0) {
7393 h += 4;
7394
7395 if (memcmp(h, STAT_STATUS_DONE, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7396 si->applet.ctx.stats.st_code = STAT_STATUS_DONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7397 else if (memcmp(h, STAT_STATUS_NONE, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7398 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7399 else if (memcmp(h, STAT_STATUS_EXCD, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7400 si->applet.ctx.stats.st_code = STAT_STATUS_EXCD;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]7401 else if (memcmp(h, STAT_STATUS_DENY, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7402 si->applet.ctx.stats.st_code = STAT_STATUS_DENY;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7403 else
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7404 si->applet.ctx.stats.st_code = STAT_STATUS_UNKN;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7405 break;
7406 }
7407 h++;
7408 }
7409
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7410 si->applet.ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7411
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7412 return 1;
7413}
7414
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7415/*
7416 * Capture a bad request or response and archive it in the proxy's structure.
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7417 * WARNING: it's unlikely that we've reached HTTP_MSG_BODY here so we must not
7418 * assume that msg->sol = buf->data + msg->som.
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7419 */
7420void http_capture_bad_message(struct error_snapshot *es, struct session *s,
7421 struct buffer *buf, struct http_msg *msg,
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]7422 int state, struct proxy *other_end)
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7423{
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7424 if (buf->r <= (buf->data + msg->som)) { /* message wraps */
7425 int len1 = buf->size - msg->som;
7426 es->len = buf->r - (buf->data + msg->som) + buf->size;
7427 memcpy(es->buf, buf->data + msg->som, MIN(len1, sizeof(es->buf)));
7428 if (es->len > len1 && len1 < sizeof(es->buf))
7429 memcpy(es->buf, buf->data, MIN(es->len, sizeof(es->buf)) - len1);
7430 }
7431 else {
7432 es->len = buf->r - (buf->data + msg->som);
7433 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
7434 }
7435
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7436 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]7437 es->pos = msg->err_pos - msg->som;
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7438 else if (buf->lr >= (buf->data + msg->som))
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]7439 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7440 else
7441 es->pos = buf->lr - (buf->data + msg->som) + buf->size;
7442
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7443 es->when = date; // user-visible date
7444 es->sid = s->uniq_id;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7445 es->srv = target_srv(&s->target);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7446 es->oe = other_end;
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]7447 es->src = s->req->prod->addr.c.from;
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]7448 es->state = state;
7449 es->flags = buf->flags;
Willy Tarreau10479e42010-12-12 14:00:34 +0100[diff] [blame]7450 es->ev_id = error_snapshot_id++;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7451}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7452
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7453/* return the IP address pointed to by occurrence <occ> of header <hname> in
7454 * HTTP message <msg> indexed in <idx>. If <occ> is strictly positive, the
7455 * occurrence number corresponding to this value is returned. If <occ> is
7456 * strictly negative, the occurrence number before the end corresponding to
7457 * this value is returned. If <occ> is null, any value is returned, so it is
7458 * not recommended to use it that way. Negative occurrences are limited to
7459 * a small value because it is required to keep them in memory while scanning.
7460 * IP address 0.0.0.0 is returned if no match is found.
7461 */
7462unsigned int get_ip_from_hdr2(struct http_msg *msg, const char *hname, int hlen, struct hdr_idx *idx, int occ)
7463{
7464 struct hdr_ctx ctx;
7465 unsigned int hdr_hist[MAX_HDR_HISTORY];
7466 unsigned int hist_ptr;
7467 int found = 0;
7468
7469 ctx.idx = 0;
7470 if (occ >= 0) {
7471 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
7472 occ--;
7473 if (occ <= 0) {
7474 found = 1;
7475 break;
7476 }
7477 }
7478 if (!found)
7479 return 0;
7480 return inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
7481 }
7482
7483 /* negative occurrence, we scan all the list then walk back */
7484 if (-occ > MAX_HDR_HISTORY)
7485 return 0;
7486
7487 hist_ptr = 0;
7488 hdr_hist[hist_ptr] = 0;
7489 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
7490 hdr_hist[hist_ptr++] = inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
7491 if (hist_ptr >= MAX_HDR_HISTORY)
7492 hist_ptr = 0;
7493 found++;
7494 }
7495 if (-occ > found)
7496 return 0;
7497 /* OK now we have the last occurrence in [hist_ptr-1], and we need to
7498 * find occurrence -occ, so we have to check [hist_ptr+occ].
7499 */
7500 hist_ptr += occ;
7501 if (hist_ptr >= MAX_HDR_HISTORY)
7502 hist_ptr -= MAX_HDR_HISTORY;
7503 return hdr_hist[hist_ptr];
7504}
7505
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]7506/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7507 * Print a debug line with a header
7508 */
7509void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
7510{
7511 int len, max;
7512 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]7513 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7514 max = end - start;
7515 UBOUND(max, sizeof(trash) - len - 1);
7516 len += strlcpy2(trash + len, start, max + 1);
7517 trash[len++] = '\n';
7518 write(1, trash, len);
7519}
7520
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7521/*
7522 * Initialize a new HTTP transaction for session <s>. It is assumed that all
7523 * the required fields are properly allocated and that we only need to (re)init
7524 * them. This should be used before processing any new request.
7525 */
7526void http_init_txn(struct session *s)
7527{
7528 struct http_txn *txn = &s->txn;
7529 struct proxy *fe = s->fe;
7530
7531 txn->flags = 0;
7532 txn->status = -1;
7533
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]7534 txn->cookie_first_date = 0;
7535 txn->cookie_last_date = 0;
7536
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7537 txn->req.sol = txn->req.eol = NULL;
7538 txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
7539 txn->rsp.sol = txn->rsp.eol = NULL;
7540 txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]7541 txn->req.chunk_len = 0LL;
7542 txn->req.body_len = 0LL;
7543 txn->rsp.chunk_len = 0LL;
7544 txn->rsp.body_len = 0LL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7545 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
7546 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7547
7548 txn->auth.method = HTTP_AUTH_UNKNOWN;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7549
7550 txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
7551 if (fe->options2 & PR_O2_REQBUG_OK)
7552 txn->req.err_pos = -1; /* let buggy requests pass */
7553
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7554 if (txn->req.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7555 memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *));
7556
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7557 if (txn->rsp.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7558 memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *));
7559
7560 if (txn->hdr_idx.v)
7561 hdr_idx_init(&txn->hdr_idx);
7562}
7563
7564/* to be used at the end of a transaction */
7565void http_end_txn(struct session *s)
7566{
7567 struct http_txn *txn = &s->txn;
7568
7569 /* these ones will have been dynamically allocated */
7570 pool_free2(pool2_requri, txn->uri);
7571 pool_free2(pool2_capture, txn->cli_cookie);
7572 pool_free2(pool2_capture, txn->srv_cookie);
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7573 pool_free2(apools.sessid, txn->sessid);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7574
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7575 txn->sessid = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7576 txn->uri = NULL;
7577 txn->srv_cookie = NULL;
7578 txn->cli_cookie = NULL;
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7579
7580 if (txn->req.cap) {
7581 struct cap_hdr *h;
7582 for (h = s->fe->req_cap; h; h = h->next)
7583 pool_free2(h->pool, txn->req.cap[h->index]);
7584 memset(txn->req.cap, 0, s->fe->nb_req_cap * sizeof(void *));
7585 }
7586
7587 if (txn->rsp.cap) {
7588 struct cap_hdr *h;
7589 for (h = s->fe->rsp_cap; h; h = h->next)
7590 pool_free2(h->pool, txn->rsp.cap[h->index]);
7591 memset(txn->rsp.cap, 0, s->fe->nb_rsp_cap * sizeof(void *));
7592 }
7593
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7594}
7595
7596/* to be used at the end of a transaction to prepare a new one */
7597void http_reset_txn(struct session *s)
7598{
7599 http_end_txn(s);
7600 http_init_txn(s);
7601
7602 s->be = s->fe;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7603 s->logs.logwait = s->fe->to_log;
Simon Hormanaf514952011-06-21 14:34:57 +0900[diff] [blame]7604 session_del_srv_conn(s);
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]7605 clear_target(&s->target);
Emeric Brunb982a3d2010-01-04 15:45:53 +0100[diff] [blame]7606 /* re-init store persistence */
7607 s->store_count = 0;
7608
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7609 s->pend_pos = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7610
7611 s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
7612
Willy Tarreau739cfba2010-01-25 23:11:14 +0100[diff] [blame]7613 /* We must trim any excess data from the response buffer, because we
7614 * may have blocked an invalid response from a server that we don't
7615 * want to accidentely forward once we disable the analysers, nor do
7616 * we want those data to come along with next response. A typical
7617 * example of such data would be from a buggy server responding to
7618 * a HEAD with some data, or sending more than the advertised
7619 * content-length.
7620 */
7621 if (unlikely(s->rep->l > s->rep->send_max)) {
7622 s->rep->l = s->rep->send_max;
7623 s->rep->r = s->rep->w + s->rep->l;
7624 if (s->rep->r >= s->rep->data + s->rep->size)
7625 s->rep->r -= s->rep->size;
7626 }
7627
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7628 s->req->rto = s->fe->timeout.client;
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7629 s->req->wto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7630
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7631 s->rep->rto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7632 s->rep->wto = s->fe->timeout.client;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7633
7634 s->req->rex = TICK_ETERNITY;
7635 s->req->wex = TICK_ETERNITY;
7636 s->req->analyse_exp = TICK_ETERNITY;
7637 s->rep->rex = TICK_ETERNITY;
7638 s->rep->wex = TICK_ETERNITY;
7639 s->rep->analyse_exp = TICK_ETERNITY;
7640}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7641
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]7642void free_http_req_rules(struct list *r) {
7643 struct http_req_rule *tr, *pr;
7644
7645 list_for_each_entry_safe(pr, tr, r, list) {
7646 LIST_DEL(&pr->list);
7647 if (pr->action == HTTP_REQ_ACT_HTTP_AUTH)
7648 free(pr->http_auth.realm);
7649
7650 free(pr);
7651 }
7652}
7653
7654struct http_req_rule *parse_http_req_cond(const char **args, const char *file, int linenum, struct proxy *proxy)
7655{
7656 struct http_req_rule *rule;
7657 int cur_arg;
7658
7659 rule = (struct http_req_rule*)calloc(1, sizeof(struct http_req_rule));
7660 if (!rule) {
7661 Alert("parsing [%s:%d]: out of memory.\n", file, linenum);
7662 return NULL;
7663 }
7664
7665 if (!*args[0]) {
7666 goto req_error_parsing;
7667 } else if (!strcmp(args[0], "allow")) {
7668 rule->action = HTTP_REQ_ACT_ALLOW;
7669 cur_arg = 1;
7670 } else if (!strcmp(args[0], "deny")) {
7671 rule->action = HTTP_REQ_ACT_DENY;
7672 cur_arg = 1;
7673 } else if (!strcmp(args[0], "auth")) {
7674 rule->action = HTTP_REQ_ACT_HTTP_AUTH;
7675 cur_arg = 1;
7676
7677 while(*args[cur_arg]) {
7678 if (!strcmp(args[cur_arg], "realm")) {
7679 rule->http_auth.realm = strdup(args[cur_arg + 1]);
7680 cur_arg+=2;
7681 continue;
7682 } else
7683 break;
7684 }
7685 } else {
7686req_error_parsing:
7687 Alert("parsing [%s:%d]: %s '%s', expects 'allow', 'deny', 'auth'.\n",
7688 file, linenum, *args[1]?"unknown parameter":"missing keyword in", args[*args[1]?1:0]);
7689 return NULL;
7690 }
7691
7692 if (strcmp(args[cur_arg], "if") == 0 || strcmp(args[cur_arg], "unless") == 0) {
7693 struct acl_cond *cond;
7694
7695 if ((cond = build_acl_cond(file, linenum, proxy, args+cur_arg)) == NULL) {
7696 Alert("parsing [%s:%d] : error detected while parsing an 'http-request %s' condition.\n",
7697 file, linenum, args[0]);
7698 return NULL;
7699 }
7700 rule->cond = cond;
7701 }
7702 else if (*args[cur_arg]) {
7703 Alert("parsing [%s:%d]: 'http-request %s' expects 'realm' for 'auth' or"
7704 " either 'if' or 'unless' followed by a condition but found '%s'.\n",
7705 file, linenum, args[0], args[cur_arg]);
7706 return NULL;
7707 }
7708
7709 return rule;
7710}
7711
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7712/************************************************************************/
7713/* The code below is dedicated to ACL parsing and matching */
7714/************************************************************************/
7715
7716
7717
7718
7719/* 1. Check on METHOD
7720 * We use the pre-parsed method if it is known, and store its number as an
7721 * integer. If it is unknown, we use the pointer and the length.
7722 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7723static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7724{
7725 int len, meth;
7726
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7727 len = strlen(*text);
7728 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7729
7730 pattern->val.i = meth;
7731 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7732 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7733 if (!pattern->ptr.str)
7734 return 0;
7735 pattern->len = len;
7736 }
7737 return 1;
7738}
7739
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7740static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7741acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
7742 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7743{
7744 int meth;
7745 struct http_txn *txn = l7;
7746
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7747 if (!txn)
7748 return 0;
7749
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7750 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7751 return 0;
7752
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7753 meth = txn->meth;
7754 test->i = meth;
7755 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7756 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7757 /* ensure the indexes are not affected */
7758 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7759 test->len = txn->req.sl.rq.m_l;
7760 test->ptr = txn->req.sol;
7761 }
7762 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7763 return 1;
7764}
7765
7766static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
7767{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7768 int icase;
7769
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7770 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7771 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7772
7773 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7774 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7775
7776 /* Other method, we must compare the strings */
7777 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7778 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7779
7780 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
7781 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
7782 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7783 return ACL_PAT_FAIL;
7784 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7785}
7786
7787/* 2. Check on Request/Status Version
7788 * We simply compare strings here.
7789 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7790static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7791{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7792 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7793 if (!pattern->ptr.str)
7794 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7795 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7796 return 1;
7797}
7798
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7799static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7800acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
7801 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7802{
7803 struct http_txn *txn = l7;
7804 char *ptr;
7805 int len;
7806
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7807 if (!txn)
7808 return 0;
7809
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7810 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7811 return 0;
7812
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7813 len = txn->req.sl.rq.v_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7814 ptr = txn->req.sol + txn->req.sl.rq.v;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7815
7816 while ((len-- > 0) && (*ptr++ != '/'));
7817 if (len <= 0)
7818 return 0;
7819
7820 test->ptr = ptr;
7821 test->len = len;
7822
7823 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7824 return 1;
7825}
7826
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7827static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7828acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
7829 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7830{
7831 struct http_txn *txn = l7;
7832 char *ptr;
7833 int len;
7834
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7835 if (!txn)
7836 return 0;
7837
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7838 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7839 return 0;
7840
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7841 len = txn->rsp.sl.st.v_l;
7842 ptr = txn->rsp.sol;
7843
7844 while ((len-- > 0) && (*ptr++ != '/'));
7845 if (len <= 0)
7846 return 0;
7847
7848 test->ptr = ptr;
7849 test->len = len;
7850
7851 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7852 return 1;
7853}
7854
7855/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7856static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7857acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
7858 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7859{
7860 struct http_txn *txn = l7;
7861 char *ptr;
7862 int len;
7863
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7864 if (!txn)
7865 return 0;
7866
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7867 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7868 return 0;
7869
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7870 len = txn->rsp.sl.st.c_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7871 ptr = txn->rsp.sol + txn->rsp.sl.st.c;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7872
7873 test->i = __strl2ui(ptr, len);
7874 test->flags = ACL_TEST_F_VOL_1ST;
7875 return 1;
7876}
7877
7878/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7879static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7880acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
7881 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7882{
7883 struct http_txn *txn = l7;
7884
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7885 if (!txn)
7886 return 0;
7887
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7888 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7889 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7890
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7891 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7892 /* ensure the indexes are not affected */
7893 return 0;
7894
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7895 test->len = txn->req.sl.rq.u_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7896 test->ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7897
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]7898 /* we do not need to set READ_ONLY because the data is in a buffer */
7899 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7900 return 1;
7901}
7902
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7903static int
7904acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7905 struct acl_expr *expr, struct acl_test *test)
7906{
7907 struct http_txn *txn = l7;
7908
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7909 if (!txn)
7910 return 0;
7911
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7912 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7913 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7914
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7915 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7916 /* ensure the indexes are not affected */
7917 return 0;
7918
7919 /* Parse HTTP request */
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]7920 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->req->cons->addr.s.to);
7921 test->ptr = (void *)&((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr;
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7922 test->i = AF_INET;
7923
7924 /*
7925 * If we are parsing url in frontend space, we prepare backend stage
7926 * to not parse again the same url ! optimization lazyness...
7927 */
7928 if (px->options & PR_O_HTTP_PROXY)
7929 l4->flags |= SN_ADDR_SET;
7930
7931 test->flags = ACL_TEST_F_READ_ONLY;
7932 return 1;
7933}
7934
7935static int
7936acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
7937 struct acl_expr *expr, struct acl_test *test)
7938{
7939 struct http_txn *txn = l7;
7940
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7941 if (!txn)
7942 return 0;
7943
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7944 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7945 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7946
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7947 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7948 /* ensure the indexes are not affected */
7949 return 0;
7950
7951 /* Same optimization as url_ip */
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]7952 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->req->cons->addr.s.to);
7953 test->i = ntohs(((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_port);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7954
7955 if (px->options & PR_O_HTTP_PROXY)
7956 l4->flags |= SN_ADDR_SET;
7957
7958 test->flags = ACL_TEST_F_READ_ONLY;
7959 return 1;
7960}
7961
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7962/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
7963 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
7964 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7965static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7966acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7967 struct acl_expr *expr, struct acl_test *test)
7968{
7969 struct http_txn *txn = l7;
7970 struct hdr_idx *idx = &txn->hdr_idx;
7971 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7972
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7973 if (!txn)
7974 return 0;
7975
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7976 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7977 /* search for header from the beginning */
7978 ctx->idx = 0;
7979
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7980 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7981 test->flags |= ACL_TEST_F_FETCH_MORE;
7982 test->flags |= ACL_TEST_F_VOL_HDR;
7983 test->len = ctx->vlen;
7984 test->ptr = (char *)ctx->line + ctx->val;
7985 return 1;
7986 }
7987
7988 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7989 test->flags |= ACL_TEST_F_VOL_HDR;
7990 return 0;
7991}
7992
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7993static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7994acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
7995 struct acl_expr *expr, struct acl_test *test)
7996{
7997 struct http_txn *txn = l7;
7998
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7999 if (!txn)
8000 return 0;
8001
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8002 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8003 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8004
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8005 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8006 /* ensure the indexes are not affected */
8007 return 0;
8008
8009 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
8010}
8011
8012static int
8013acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
8014 struct acl_expr *expr, struct acl_test *test)
8015{
8016 struct http_txn *txn = l7;
8017
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8018 if (!txn)
8019 return 0;
8020
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8021 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8022 return 0;
8023
8024 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
8025}
8026
8027/* 6. Check on HTTP header count. The number of occurrences is returned.
8028 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
8029 */
8030static int
8031acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8032 struct acl_expr *expr, struct acl_test *test)
8033{
8034 struct http_txn *txn = l7;
8035 struct hdr_idx *idx = &txn->hdr_idx;
8036 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8037 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8038
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8039 if (!txn)
8040 return 0;
8041
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8042 ctx.idx = 0;
8043 cnt = 0;
8044 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
8045 cnt++;
8046
8047 test->i = cnt;
8048 test->flags = ACL_TEST_F_VOL_HDR;
8049 return 1;
8050}
8051
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8052static int
8053acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
8054 struct acl_expr *expr, struct acl_test *test)
8055{
8056 struct http_txn *txn = l7;
8057
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8058 if (!txn)
8059 return 0;
8060
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8061 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8062 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8063
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8064 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8065 /* ensure the indexes are not affected */
8066 return 0;
8067
8068 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
8069}
8070
8071static int
8072acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
8073 struct acl_expr *expr, struct acl_test *test)
8074{
8075 struct http_txn *txn = l7;
8076
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8077 if (!txn)
8078 return 0;
8079
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8080 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8081 return 0;
8082
8083 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
8084}
8085
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8086/* 7. Check on HTTP header's integer value. The integer value is returned.
8087 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8088 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8089 */
8090static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8091acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8092 struct acl_expr *expr, struct acl_test *test)
8093{
8094 struct http_txn *txn = l7;
8095 struct hdr_idx *idx = &txn->hdr_idx;
8096 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8097
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8098 if (!txn)
8099 return 0;
8100
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8101 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
8102 /* search for header from the beginning */
8103 ctx->idx = 0;
8104
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8105 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
8106 test->flags |= ACL_TEST_F_FETCH_MORE;
8107 test->flags |= ACL_TEST_F_VOL_HDR;
8108 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
8109 return 1;
8110 }
8111
8112 test->flags &= ~ACL_TEST_F_FETCH_MORE;
8113 test->flags |= ACL_TEST_F_VOL_HDR;
8114 return 0;
8115}
8116
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8117static int
8118acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
8119 struct acl_expr *expr, struct acl_test *test)
8120{
8121 struct http_txn *txn = l7;
8122
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8123 if (!txn)
8124 return 0;
8125
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8126 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8127 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8128
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8129 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8130 /* ensure the indexes are not affected */
8131 return 0;
8132
8133 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
8134}
8135
8136static int
8137acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
8138 struct acl_expr *expr, struct acl_test *test)
8139{
8140 struct http_txn *txn = l7;
8141
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8142 if (!txn)
8143 return 0;
8144
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8145 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8146 return 0;
8147
8148 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
8149}
8150
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8151/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
8152 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
8153 */
8154static int
8155acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
8156 struct acl_expr *expr, struct acl_test *test)
8157{
8158 struct http_txn *txn = l7;
8159 struct hdr_idx *idx = &txn->hdr_idx;
8160 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
8161
8162 if (!txn)
8163 return 0;
8164
8165 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
8166 /* search for header from the beginning */
8167 ctx->idx = 0;
8168
8169 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
8170 test->flags |= ACL_TEST_F_FETCH_MORE;
8171 test->flags |= ACL_TEST_F_VOL_HDR;
8172 /* Same optimization as url_ip */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100[diff] [blame]8173 memset(&((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr, 0, sizeof(((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr));
8174 url2ipv4((char *)ctx->line + ctx->val, &((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr);
8175 test->ptr = (void *)&((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr;
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8176 test->i = AF_INET;
8177 return 1;
8178 }
8179
8180 test->flags &= ~ACL_TEST_F_FETCH_MORE;
8181 test->flags |= ACL_TEST_F_VOL_HDR;
8182 return 0;
8183}
8184
8185static int
8186acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
8187 struct acl_expr *expr, struct acl_test *test)
8188{
8189 struct http_txn *txn = l7;
8190
8191 if (!txn)
8192 return 0;
8193
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8194 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8195 return 0;
8196
8197 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8198 /* ensure the indexes are not affected */
8199 return 0;
8200
8201 return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
8202}
8203
8204static int
8205acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
8206 struct acl_expr *expr, struct acl_test *test)
8207{
8208 struct http_txn *txn = l7;
8209
8210 if (!txn)
8211 return 0;
8212
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8213 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8214 return 0;
8215
8216 return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
8217}
8218
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8219/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
8220 * the first '/' after the possible hostname, and ends before the possible '?'.
8221 */
8222static int
8223acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
8224 struct acl_expr *expr, struct acl_test *test)
8225{
8226 struct http_txn *txn = l7;
8227 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8228
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8229 if (!txn)
8230 return 0;
8231
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8232 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8233 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8234
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8235 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8236 /* ensure the indexes are not affected */
8237 return 0;
8238
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]8239 end = txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]8240 ptr = http_get_path(txn);
8241 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8242 return 0;
8243
8244 /* OK, we got the '/' ! */
8245 test->ptr = ptr;
8246
8247 while (ptr < end && *ptr != '?')
8248 ptr++;
8249
8250 test->len = ptr - test->ptr;
8251
8252 /* we do not need to set READ_ONLY because the data is in a buffer */
8253 test->flags = ACL_TEST_F_VOL_1ST;
8254 return 1;
8255}
8256
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8257static int
8258acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
8259 struct acl_expr *expr, struct acl_test *test)
8260{
8261 struct buffer *req = s->req;
8262 struct http_txn *txn = &s->txn;
8263 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8264
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8265 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
8266 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
8267 */
8268
8269 if (!s || !req)
8270 return 0;
8271
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8272 if (unlikely(msg->msg_state >= HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8273 /* Already decoded as OK */
8274 test->flags |= ACL_TEST_F_SET_RES_PASS;
8275 return 1;
8276 }
8277
8278 /* Try to decode HTTP request */
8279 if (likely(req->lr < req->r))
8280 http_msg_analyzer(req, msg, &txn->hdr_idx);
8281
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8282 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8283 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
8284 test->flags |= ACL_TEST_F_SET_RES_FAIL;
8285 return 1;
8286 }
8287 /* wait for final state */
8288 test->flags |= ACL_TEST_F_MAY_CHANGE;
8289 return 0;
8290 }
8291
8292 /* OK we got a valid HTTP request. We have some minor preparation to
8293 * perform so that further checks can rely on HTTP tests.
8294 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]8295 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8296 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
8297 s->flags |= SN_REDIRECTABLE;
8298
8299 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
8300 test->flags |= ACL_TEST_F_SET_RES_FAIL;
8301 return 1;
8302 }
8303
8304 test->flags |= ACL_TEST_F_SET_RES_PASS;
8305 return 1;
8306}
8307
Willy Tarreau7f18e522010-10-22 20:04:13 +0200[diff] [blame]8308/* return a valid test if the current request is the first one on the connection */
8309static int
8310acl_fetch_http_first_req(struct proxy *px, struct session *s, void *l7, int dir,
8311 struct acl_expr *expr, struct acl_test *test)
8312{
8313 if (!s)
8314 return 0;
8315
8316 if (s->txn.flags & TX_NOT_FIRST)
8317 test->flags |= ACL_TEST_F_SET_RES_FAIL;
8318 else
8319 test->flags |= ACL_TEST_F_SET_RES_PASS;
8320
8321 return 1;
8322}
8323
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8324static int
8325acl_fetch_http_auth(struct proxy *px, struct session *s, void *l7, int dir,
8326 struct acl_expr *expr, struct acl_test *test)
8327{
8328
8329 if (!s)
8330 return 0;
8331
8332 if (!get_http_auth(s))
8333 return 0;
8334
8335 test->ctx.a[0] = expr->arg.ul;
8336 test->ctx.a[1] = s->txn.auth.user;
8337 test->ctx.a[2] = s->txn.auth.pass;
8338
8339 test->flags |= ACL_TEST_F_READ_ONLY | ACL_TEST_F_NULL_MATCH;
8340
8341 return 1;
8342}
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8343
8344/************************************************************************/
8345/* All supported keywords must be declared here. */
8346/************************************************************************/
8347
8348/* Note: must not be declared <const> as its list will be overwritten */
8349static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8350 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
8351
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8352 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8353 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
8354 { "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8355 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8356
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8357 { "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8358 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8359 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8360 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8361 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8362 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
8363 { "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
Willy Tarreaub337b532010-05-13 20:03:41 +0200[diff] [blame]8364 { "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8365 { "url_port", acl_parse_int, acl_fetch_url_port, acl_match_int, ACL_USE_L7REQ_VOLATILE },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8366
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8367 /* note: we should set hdr* to use ACL_USE_HDR_VOLATILE, and chdr* to use L7REQ_VOLATILE */
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8368 { "hdr", acl_parse_str, acl_fetch_chdr, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8369 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
8370 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8371 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8372 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8373 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8374 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
8375 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
8376 { "hdr_val", acl_parse_int, acl_fetch_chdr_val,acl_match_int, ACL_USE_L7REQ_VOLATILE },
Willy Tarreaub337b532010-05-13 20:03:41 +0200[diff] [blame]8377 { "hdr_ip", acl_parse_ip, acl_fetch_chdr_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8378
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8379 { "shdr", acl_parse_str, acl_fetch_shdr, acl_match_str, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8380 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
8381 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
8382 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
8383 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
8384 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
8385 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
8386 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
8387 { "shdr_val", acl_parse_int, acl_fetch_shdr_val,acl_match_int, ACL_USE_L7RTR_VOLATILE },
Willy Tarreaub337b532010-05-13 20:03:41 +0200[diff] [blame]8388 { "shdr_ip", acl_parse_ip, acl_fetch_shdr_ip, acl_match_ip, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8389
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8390 { "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8391 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
8392 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8393 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8394 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8395 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8396 { "path_dom", acl_parse_str, acl_fetch_path, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8397
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]8398#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8399 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
8400 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
8401 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
8402 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
8403 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
8404 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
8405 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
8406
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8407 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
8408 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
8409 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
8410 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
8411 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
8412 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
8413 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
8414 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8415#endif
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8416
Willy Tarreau7f18e522010-10-22 20:04:13 +0200[diff] [blame]8417 { "http_auth", acl_parse_nothing, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT },
8418 { "http_auth_group", acl_parse_strcat, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT },
8419 { "http_first_req", acl_parse_nothing, acl_fetch_http_first_req, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8420 { NULL, NULL, NULL, NULL },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8421}};
8422
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8423/************************************************************************/
8424/* The code below is dedicated to pattern fetching and matching */
8425/************************************************************************/
8426
8427/* extract the IP address from the last occurrence of specified header. Note
8428 * that we should normally first extract the string then convert it to IP,
8429 * but right now we have all the functions to do this seemlessly, and we will
8430 * be able to change that later without touching the configuration.
8431 */
8432static int
8433pattern_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8434 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8435{
8436 struct http_txn *txn = l7;
8437
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8438 data->ip.s_addr = htonl(get_ip_from_hdr2(&txn->req, arg_p->data.str.str, arg_p->data.str.len, &txn->hdr_idx, -1));
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8439 return data->ip.s_addr != 0;
8440}
8441
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8442/*
8443 * Given a path string and its length, find the position of beginning of the
8444 * query string. Returns NULL if no query string is found in the path.
8445 *
8446 * Example: if path = "/foo/bar/fubar?yo=mama;ye=daddy", and n = 22:
8447 *
8448 * find_query_string(path, n) points to "yo=mama;ye=daddy" string.
8449 */
8450static inline char *find_query_string(char *path, size_t path_l)
8451{
8452 char *p;
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8453
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8454 p = memchr(path, '?', path_l);
8455 return p ? p + 1 : NULL;
8456}
8457
8458static inline int is_param_delimiter(char c)
8459{
8460 return c == '&' || c == ';';
8461}
8462
8463/*
8464 * Given a url parameter, find the starting position of the first occurence,
8465 * or NULL if the parameter is not found.
8466 *
8467 * Example: if query_string is "yo=mama;ye=daddy" and url_param_name is "ye",
8468 * the function will return query_string+8.
8469 */
8470static char*
8471find_url_param_pos(char* query_string, size_t query_string_l,
8472 char* url_param_name, size_t url_param_name_l)
8473{
8474 char *pos, *last;
8475
8476 pos = query_string;
8477 last = query_string + query_string_l - url_param_name_l - 1;
8478
8479 while (pos <= last) {
8480 if (pos[url_param_name_l] == '=') {
8481 if (memcmp(pos, url_param_name, url_param_name_l) == 0)
8482 return pos;
8483 pos += url_param_name_l + 1;
8484 }
8485 while (pos <= last && !is_param_delimiter(*pos))
8486 pos++;
8487 pos++;
8488 }
8489 return NULL;
8490}
8491
8492/*
8493 * Given a url parameter name, returns its value and size into *value and
8494 * *value_l respectively, and returns non-zero. If the parameter is not found,
8495 * zero is returned and value/value_l are not touched.
8496 */
8497static int
8498find_url_param_value(char* path, size_t path_l,
8499 char* url_param_name, size_t url_param_name_l,
8500 char** value, size_t* value_l)
8501{
8502 char *query_string, *qs_end;
8503 char *arg_start;
8504 char *value_start, *value_end;
8505
8506 query_string = find_query_string(path, path_l);
8507 if (!query_string)
8508 return 0;
8509
8510 qs_end = path + path_l;
8511 arg_start = find_url_param_pos(query_string, qs_end - query_string,
8512 url_param_name, url_param_name_l);
8513 if (!arg_start)
8514 return 0;
8515
8516 value_start = arg_start + url_param_name_l + 1;
8517 value_end = value_start;
8518
8519 while ((value_end < qs_end) && !is_param_delimiter(*value_end))
8520 value_end++;
8521
8522 *value = value_start;
8523 *value_l = value_end - value_start;
Willy Tarreau00134332011-01-04 14:57:34 +0100[diff] [blame]8524 return value_end != value_start;
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8525}
8526
8527static int
8528pattern_fetch_url_param(struct proxy *px, struct session *l4, void *l7, int dir,
8529 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
8530{
8531 struct http_txn *txn = l7;
8532 struct http_msg *msg = &txn->req;
8533 char *url_param_value;
8534 size_t url_param_value_l;
8535
8536 if (!find_url_param_value(msg->sol + msg->sl.rq.u, msg->sl.rq.u_l,
8537 arg_p->data.str.str, arg_p->data.str.len,
8538 &url_param_value, &url_param_value_l))
8539 return 0;
8540
8541 data->str.str = url_param_value;
8542 data->str.len = url_param_value_l;
8543 return 1;
8544}
8545
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8546/* Try to find the last occurrence of a cookie name in a cookie header value.
8547 * The pointer and size of the last occurrence of the cookie value is returned
8548 * into *value and *value_l, and the function returns non-zero if the value was
8549 * found. Otherwise if the cookie was not found, zero is returned and neither
8550 * value nor value_l are touched. The input hdr string should begin at the
8551 * header's value, and its size should be in hdr_l. <list> must be non-zero if
8552 * value may represent a list of values (cookie headers).
8553 */
8554static int
8555extract_cookie_value(char *hdr, size_t hdr_l,
8556 char *cookie_name, size_t cookie_name_l, int list,
8557 char **value, size_t *value_l)
8558{
8559 int found = 0;
8560 char *equal, *att_end, *att_beg, *hdr_end, *val_beg, *val_end;
8561 char *next;
8562
8563 /* Note that multiple cookies may be delimited with semi-colons, so we
8564 * also have to loop on this.
8565 */
8566
8567 /* we search at least a cookie name followed by an equal, and more
8568 * generally something like this :
8569 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
8570 */
8571 if (hdr_l < cookie_name_l + 1)
8572 return 0;
8573
8574 hdr_end = hdr + hdr_l;
8575
8576 for (att_beg = hdr; att_beg < hdr_end; att_beg = next + 1) {
8577 /* Iterate through all cookies on this line */
8578
8579 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
8580 att_beg++;
8581
8582 /* find att_end : this is the first character after the last non
8583 * space before the equal. It may be equal to hdr_end.
8584 */
8585 equal = att_end = att_beg;
8586
8587 while (equal < hdr_end) {
8588 if (*equal == '=' || *equal == ';' || (list && *equal == ','))
8589 break;
8590 if (http_is_spht[(unsigned char)*equal++])
8591 continue;
8592 att_end = equal;
8593 }
8594
8595 /* here, <equal> points to '=', a delimitor or the end. <att_end>
8596 * is between <att_beg> and <equal>, both may be identical.
8597 */
8598
8599 /* look for end of cookie if there is an equal sign */
8600 if (equal < hdr_end && *equal == '=') {
8601 /* look for the beginning of the value */
8602 val_beg = equal + 1;
8603 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
8604 val_beg++;
8605
8606 /* find the end of the value, respecting quotes */
8607 next = find_cookie_value_end(val_beg, hdr_end);
8608
8609 /* make val_end point to the first white space or delimitor after the value */
8610 val_end = next;
8611 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
8612 val_end--;
8613 } else {
8614 val_beg = val_end = next = equal;
8615 }
8616
8617 /* We have nothing to do with attributes beginning with '$'. However,
8618 * they will automatically be removed if a header before them is removed,
8619 * since they're supposed to be linked together.
8620 */
8621 if (*att_beg == '$')
8622 continue;
8623
8624 /* Ignore cookies with no equal sign */
8625 if (equal == next)
8626 continue;
8627
8628 /* Now we have the cookie name between att_beg and att_end, and
8629 * its value between val_beg and val_end.
8630 */
8631
8632 if (att_end - att_beg == cookie_name_l &&
8633 memcmp(att_beg, cookie_name, cookie_name_l) == 0) {
8634 found = 1;
8635 *value = val_beg;
8636 *value_l = val_end - val_beg;
8637 /* right now we want to catch the last occurrence
8638 * of the cookie, so let's go on searching.
8639 */
8640 }
8641
8642 /* Set-Cookie headers only have the name in the first attr=value part */
8643 if (!list)
8644 break;
8645 }
8646
8647 return found;
8648}
8649
8650/* Try to find in request or response message is in <msg> and whose transaction
8651 * is in <txn> the last occurrence of a cookie name in all cookie header values
8652 * whose header name is <hdr_name> with name of length <hdr_name_len>. The
8653 * pointer and size of the last occurrence of the cookie value is returned into
8654 * <value> and <value_l>, and the function returns non-zero if the value was
8655 * found. Otherwise if the cookie was not found, zero is returned and neither
8656 * value nor value_l are touched. The input hdr string should begin at the
8657 * header's value, and its size should be in hdr_l. <list> must be non-zero if
8658 * value may represent a list of values (cookie headers).
8659 */
8660
8661static int
8662find_cookie_value(struct http_msg *msg, struct http_txn *txn,
8663 const char *hdr_name, int hdr_name_len,
8664 char *cookie_name, size_t cookie_name_l, int list,
8665 char **value, size_t *value_l)
8666{
8667 struct hdr_ctx ctx;
8668 int found = 0;
8669
8670 ctx.idx = 0;
8671 while (http_find_header2(hdr_name, hdr_name_len, msg->sol, &txn->hdr_idx, &ctx)) {
8672 if (ctx.vlen < cookie_name_l + 1)
8673 continue;
8674
8675 found |= extract_cookie_value(ctx.line + ctx.val, ctx.vlen,
8676 cookie_name, cookie_name_l, 1,
8677 value, value_l);
8678 }
8679 return found;
8680}
8681
8682static int
8683pattern_fetch_cookie(struct proxy *px, struct session *l4, void *l7, int dir,
8684 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
8685{
8686 struct http_txn *txn = l7;
8687 struct http_msg *msg = &txn->req;
8688 char *cookie_value;
8689 size_t cookie_value_l;
8690 int found = 0;
8691
8692 found = find_cookie_value(msg, txn, "Cookie", 6,
8693 arg_p->data.str.str, arg_p->data.str.len, 1,
8694 &cookie_value, &cookie_value_l);
8695 if (found) {
8696 data->str.str = cookie_value;
8697 data->str.len = cookie_value_l;
8698 }
8699
8700 return found;
8701}
8702
8703
8704static int
8705pattern_fetch_set_cookie(struct proxy *px, struct session *l4, void *l7, int dir,
8706 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
8707{
8708 struct http_txn *txn = l7;
8709 struct http_msg *msg = &txn->rsp;
8710 char *cookie_value;
8711 size_t cookie_value_l;
8712 int found = 0;
8713
8714 found = find_cookie_value(msg, txn, "Set-Cookie", 10,
8715 arg_p->data.str.str, arg_p->data.str.len, 1,
8716 &cookie_value, &cookie_value_l);
8717 if (found) {
8718 data->str.str = cookie_value;
8719 data->str.len = cookie_value_l;
8720 }
8721
8722 return found;
8723}
8724
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8725
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8726/************************************************************************/
8727/* All supported keywords must be declared here. */
8728/************************************************************************/
8729/* Note: must not be declared <const> as its list will be overwritten */
8730static struct pattern_fetch_kw_list pattern_fetch_keywords = {{ },{
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8731 { "hdr", pattern_fetch_hdr_ip, pattern_arg_str, PATTERN_TYPE_IP, PATTERN_FETCH_REQ },
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8732 { "url_param", pattern_fetch_url_param, pattern_arg_str, PATTERN_TYPE_STRING, PATTERN_FETCH_REQ },
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8733 { "cookie", pattern_fetch_cookie, pattern_arg_str, PATTERN_TYPE_STRING, PATTERN_FETCH_REQ },
8734 { "set-cookie", pattern_fetch_set_cookie, pattern_arg_str, PATTERN_TYPE_STRING, PATTERN_FETCH_RTR },
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8735 { NULL, NULL, NULL, 0, 0 },
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8736}};
8737
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8738
8739__attribute__((constructor))
8740static void __http_protocol_init(void)
8741{
8742 acl_register_keywords(&acl_kws);
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8743 pattern_register_fetches(&pattern_fetch_keywords);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8744}
8745
8746
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]8747/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]8748 * Local variables:
8749 * c-indent-level: 8
8750 * c-basic-offset: 8
8751 * End:
8752 */