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git01.mediatek.com / haproxy / 509433391a434c7354ce0827b60dbd0ce340850c / . / src / proto_http.c
blob: a56be3885e325f244450a48a653d8850672713e4 [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 Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]506 ctx->del = ctx->val + ctx->vlen + ctx->tws;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]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);
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]554 ctx->tws = 0;
555 while (http_is_lws[(unsigned char)*(eol - 1)]) {
556 eol--;
557 ctx->tws++;
558 }
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]559 ctx->vlen = eol - sov;
560 return 1;
561 }
562 next_hdr:
563 sol = eol + idx->v[cur_idx].cr + 1;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]564 old_idx = cur_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]565 cur_idx = idx->v[cur_idx].next;
566 }
567 return 0;
568}
569
570int http_find_header(const char *name,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]571 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]572 struct hdr_ctx *ctx)
573{
574 return http_find_header2(name, strlen(name), sol, idx, ctx);
575}
576
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]577/* Remove one value of a header. This only works on a <ctx> returned by one of
578 * the http_find_header functions. The value is removed, as well as surrounding
579 * commas if any. If the removed value was alone, the whole header is removed.
580 * The ctx is always updated accordingly, as well as buffer <buf> and HTTP
581 * message <msg>. The new index is returned. If it is zero, it means there is
582 * no more header, so any processing may stop. The ctx is always left in a form
583 * that can be handled by http_find_header2() to find next occurrence.
584 */
585int http_remove_header2(struct http_msg *msg, struct buffer *buf,
586 struct hdr_idx *idx, struct hdr_ctx *ctx)
587{
588 int cur_idx = ctx->idx;
589 char *sol = ctx->line;
590 struct hdr_idx_elem *hdr;
591 int delta, skip_comma;
592
593 if (!cur_idx)
594 return 0;
595
596 hdr = &idx->v[cur_idx];
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]597 if (sol[ctx->del] == ':' && ctx->val + ctx->vlen + ctx->tws == hdr->len) {
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]598 /* This was the only value of the header, we must now remove it entirely. */
599 delta = buffer_replace2(buf, sol, sol + hdr->len + hdr->cr + 1, NULL, 0);
600 http_msg_move_end(msg, delta);
601 idx->used--;
602 hdr->len = 0; /* unused entry */
603 idx->v[ctx->prev].next = idx->v[ctx->idx].next;
Willy Tarreau5c4784f2011-02-12 13:07:35 +0100[diff] [blame]604 if (idx->tail == ctx->idx)
605 idx->tail = ctx->prev;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]606 ctx->idx = ctx->prev; /* walk back to the end of previous header */
607 ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1;
608 ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]609 ctx->tws = ctx->vlen = 0;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]610 return ctx->idx;
611 }
612
613 /* This was not the only value of this header. We have to remove between
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]614 * ctx->del+1 and ctx->val+ctx->vlen+ctx->tws+1 included. If it is the
615 * last entry of the list, we remove the last separator.
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]616 */
617
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]618 skip_comma = (ctx->val + ctx->vlen + ctx->tws == hdr->len) ? 0 : 1;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]619 delta = buffer_replace2(buf, sol + ctx->del + skip_comma,
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]620 sol + ctx->val + ctx->vlen + ctx->tws + skip_comma,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]621 NULL, 0);
622 hdr->len += delta;
623 http_msg_move_end(msg, delta);
624 ctx->val = ctx->del;
Willy Tarreau588bd4f2011-09-01 22:22:28 +0200[diff] [blame]625 ctx->tws = ctx->vlen = 0;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]626 return ctx->idx;
627}
628
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]629/* This function handles a server error at the stream interface level. The
630 * stream interface is assumed to be already in a closed state. An optional
631 * message is copied into the input buffer, and an HTTP status code stored.
632 * The error flags are set to the values in arguments. Any pending request
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]633 * in this buffer will be lost.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]634 */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]635static void http_server_error(struct session *t, struct stream_interface *si,
636 int err, int finst, int status, const struct chunk *msg)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]637{
Willy Tarreaud5fd51c2010-01-22 14:17:47 +0100[diff] [blame]638 buffer_auto_read(si->ob);
639 buffer_abort(si->ob);
640 buffer_auto_close(si->ob);
641 buffer_erase(si->ob);
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]642 buffer_auto_close(si->ib);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]643 buffer_auto_read(si->ib);
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]644 if (status > 0 && msg) {
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]645 t->txn.status = status;
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]646 buffer_write(si->ib, msg->str, msg->len);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]647 }
648 if (!(t->flags & SN_ERR_MASK))
649 t->flags |= err;
650 if (!(t->flags & SN_FINST_MASK))
651 t->flags |= finst;
652}
653
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]654/* This function returns the appropriate error location for the given session
655 * and message.
656 */
657
658struct chunk *error_message(struct session *s, int msgnum)
659{
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]660 if (s->be->errmsg[msgnum].str)
661 return &s->be->errmsg[msgnum];
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]662 else if (s->fe->errmsg[msgnum].str)
663 return &s->fe->errmsg[msgnum];
664 else
665 return &http_err_chunks[msgnum];
666}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]667
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]668/*
669 * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
670 * string), HTTP_METH_OTHER for unknown methods, or the identified method.
671 */
672static http_meth_t find_http_meth(const char *str, const int len)
673{
674 unsigned char m;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]675 const struct http_method_desc *h;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]676
677 m = ((unsigned)*str - 'A');
678
679 if (m < 26) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]680 for (h = http_methods[m]; h->len > 0; h++) {
681 if (unlikely(h->len != len))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]682 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]683 if (likely(memcmp(str, h->text, h->len) == 0))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]684 return h->meth;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]685 };
686 return HTTP_METH_OTHER;
687 }
688 return HTTP_METH_NONE;
689
690}
691
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]692/* Parse the URI from the given transaction (which is assumed to be in request
693 * phase) and look for the "/" beginning the PATH. If not found, return NULL.
694 * It is returned otherwise.
695 */
696static char *
697http_get_path(struct http_txn *txn)
698{
699 char *ptr, *end;
700
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]701 ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]702 end = ptr + txn->req.sl.rq.u_l;
703
704 if (ptr >= end)
705 return NULL;
706
707 /* RFC2616, par. 5.1.2 :
708 * Request-URI = "*" | absuri | abspath | authority
709 */
710
711 if (*ptr == '*')
712 return NULL;
713
714 if (isalpha((unsigned char)*ptr)) {
715 /* this is a scheme as described by RFC3986, par. 3.1 */
716 ptr++;
717 while (ptr < end &&
718 (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
719 ptr++;
720 /* skip '://' */
721 if (ptr == end || *ptr++ != ':')
722 return NULL;
723 if (ptr == end || *ptr++ != '/')
724 return NULL;
725 if (ptr == end || *ptr++ != '/')
726 return NULL;
727 }
728 /* skip [user[:passwd]@]host[:[port]] */
729
730 while (ptr < end && *ptr != '/')
731 ptr++;
732
733 if (ptr == end)
734 return NULL;
735
736 /* OK, we got the '/' ! */
737 return ptr;
738}
739
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]740/* Returns a 302 for a redirectable request. This may only be called just after
741 * the stream interface has moved to SI_ST_ASS. Unprocessable requests are
742 * left unchanged and will follow normal proxy processing.
743 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]744void perform_http_redirect(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]745{
746 struct http_txn *txn;
747 struct chunk rdr;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]748 struct server *srv;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]749 char *path;
750 int len;
751
752 /* 1: create the response header */
753 rdr.len = strlen(HTTP_302);
754 rdr.str = trash;
Willy Tarreau59e0b0f2010-01-09 21:29:23 +0100[diff] [blame]755 rdr.size = sizeof(trash);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]756 memcpy(rdr.str, HTTP_302, rdr.len);
757
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]758 srv = target_srv(&s->target);
759
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]760 /* 2: add the server's prefix */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]761 if (rdr.len + srv->rdr_len > rdr.size)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]762 return;
763
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]764 /* special prefix "/" means don't change URL */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]765 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
766 memcpy(rdr.str + rdr.len, srv->rdr_pfx, srv->rdr_len);
767 rdr.len += srv->rdr_len;
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]768 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]769
770 /* 3: add the request URI */
771 txn = &s->txn;
772 path = http_get_path(txn);
773 if (!path)
774 return;
775
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]776 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]777 if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]778 return;
779
780 memcpy(rdr.str + rdr.len, path, len);
781 rdr.len += len;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]782
783 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
784 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
785 rdr.len += 29;
786 } else {
787 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
788 rdr.len += 23;
789 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]790
791 /* prepare to return without error. */
Willy Tarreau99126c32008-11-27 10:30:51 +0100[diff] [blame]792 si->shutr(si);
793 si->shutw(si);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]794 si->err_type = SI_ET_NONE;
795 si->err_loc = NULL;
796 si->state = SI_ST_CLO;
797
798 /* send the message */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]799 http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]800
801 /* FIXME: we should increase a counter of redirects per server and per backend. */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]802 if (srv)
803 srv_inc_sess_ctr(srv);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]804}
805
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]806/* Return the error message corresponding to si->err_type. It is assumed
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]807 * that the server side is closed. Note that err_type is actually a
808 * bitmask, where almost only aborts may be cumulated with other
809 * values. We consider that aborted operations are more important
810 * than timeouts or errors due to the fact that nobody else in the
811 * logs might explain incomplete retries. All others should avoid
812 * being cumulated. It should normally not be possible to have multiple
813 * aborts at once, but just in case, the first one in sequence is reported.
814 */
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]815void http_return_srv_error(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]816{
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]817 int err_type = si->err_type;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]818
819 if (err_type & SI_ET_QUEUE_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]820 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
821 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]822 else if (err_type & SI_ET_CONN_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]823 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
824 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]825 else if (err_type & SI_ET_QUEUE_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]826 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
827 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]828 else if (err_type & SI_ET_QUEUE_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]829 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q,
830 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]831 else if (err_type & SI_ET_CONN_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]832 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
833 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]834 else if (err_type & SI_ET_CONN_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]835 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
836 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]837 else /* SI_ET_CONN_OTHER and others */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]838 http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
839 500, error_message(s, HTTP_ERR_500));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]840}
841
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]842extern const char sess_term_cond[8];
843extern const char sess_fin_state[8];
844extern const char *monthname[12];
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]845const char sess_cookie[8] = "NIDVEO67"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie, Expired cookie, Old cookie, unknown */
846const char sess_set_cookie[8] = "NPDIRU67"; /* No set-cookie, Set-cookie found and left unchanged (passive),
847 Set-cookie Deleted, Set-Cookie Inserted, Set-cookie Rewritten,
848 Set-cookie Updated, unknown, unknown */
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]849struct pool_head *pool2_requri;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]850struct pool_head *pool2_capture;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]851
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]852void http_sess_clflog(struct session *s)
853{
Cyril Bontéacd7d632010-11-01 19:26:02 +0100[diff] [blame]854 char pn[INET6_ADDRSTRLEN];
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]855 struct proxy *fe = s->fe;
856 struct proxy *be = s->be;
857 struct proxy *prx_log;
858 struct http_txn *txn = &s->txn;
859 int tolog, level, err;
860 char *uri, *h;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]861 const char *svid;
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]862 struct tm tm;
863 static char tmpline[MAX_SYSLOG_LEN];
864 int hdr;
865 size_t w;
866 int t_request;
867
868 prx_log = fe;
869 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]870 (s->req->cons->conn_retries != be->conn_retries) ||
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]871 txn->status >= 500;
872
Willy Tarreau631f01c2011-09-05 00:36:48 +0200[diff] [blame]873 if (addr_to_str(&s->req->prod->addr.c.from, pn, sizeof(pn)) == AF_UNIX)
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]874 snprintf(pn, sizeof(pn), "unix:%d", s->listener->luid);
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]875
876 get_gmtime(s->logs.accept_date.tv_sec, &tm);
877
878 /* FIXME: let's limit ourselves to frontend logging for now. */
879 tolog = fe->to_log;
880
881 h = tmpline;
882
883 w = snprintf(h, sizeof(tmpline),
884 "%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
885 pn,
886 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
887 tm.tm_hour, tm.tm_min, tm.tm_sec);
888 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
889 goto trunc;
890 h += w;
891
892 if (h >= tmpline + sizeof(tmpline) - 4)
893 goto trunc;
894
895 *(h++) = ' ';
896 *(h++) = '\"';
897 uri = txn->uri ? txn->uri : "<BADREQ>";
898 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
899 '#', url_encode_map, uri);
900 *(h++) = '\"';
901
902 w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
903 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
904 goto trunc;
905 h += w;
906
907 if (h >= tmpline + sizeof(tmpline) - 9)
908 goto trunc;
909 memcpy(h, " \"-\" \"-\"", 8);
910 h += 8;
911
912 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
913 " %d %03d",
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]914 s->req->prod->addr.c.from.ss_family == AF_UNIX ? s->listener->luid :
Willy Tarreau86ad42c2011-08-27 12:29:07 +0200[diff] [blame]915 get_host_port(&s->req->prod->addr.c.from),
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]916 (int)s->logs.accept_date.tv_usec/1000);
917 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
918 goto trunc;
919 h += w;
920
921 w = strlen(fe->id);
922 if (h >= tmpline + sizeof(tmpline) - 4 - w)
923 goto trunc;
924 *(h++) = ' ';
925 *(h++) = '\"';
926 memcpy(h, fe->id, w);
927 h += w;
928 *(h++) = '\"';
929
930 w = strlen(be->id);
931 if (h >= tmpline + sizeof(tmpline) - 4 - w)
932 goto trunc;
933 *(h++) = ' ';
934 *(h++) = '\"';
935 memcpy(h, be->id, w);
936 h += w;
937 *(h++) = '\"';
938
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]939 if (!(tolog & LW_SVID))
940 svid = "-";
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]941 else switch (s->target.type) {
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]942 case TARG_TYPE_SERVER:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]943 svid = s->target.ptr.s->id;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]944 break;
945 case TARG_TYPE_APPLET:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]946 svid = s->target.ptr.a->name;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]947 break;
948 default:
949 svid = "<NOSRV>";
950 break;
951 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]952
953 w = strlen(svid);
954 if (h >= tmpline + sizeof(tmpline) - 4 - w)
955 goto trunc;
956 *(h++) = ' ';
957 *(h++) = '\"';
958 memcpy(h, svid, w);
959 h += w;
960 *(h++) = '\"';
961
962 t_request = -1;
963 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
964 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
965 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
966 " %d %ld %ld %ld %ld",
967 t_request,
968 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
969 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
970 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
971 s->logs.t_close);
972 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
973 goto trunc;
974 h += w;
975
976 if (h >= tmpline + sizeof(tmpline) - 8)
977 goto trunc;
978 *(h++) = ' ';
979 *(h++) = '\"';
980 *(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
981 *(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
982 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
983 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
984 *(h++) = '\"';
985
986 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
987 " %d %d %d %d %d %ld %ld",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]988 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]989 (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]990 s->logs.srv_queue_size, s->logs.prx_queue_size);
991
992 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
993 goto trunc;
994 h += w;
995
996 if (txn->cli_cookie) {
997 w = strlen(txn->cli_cookie);
998 if (h >= tmpline + sizeof(tmpline) - 4 - w)
999 goto trunc;
1000 *(h++) = ' ';
1001 *(h++) = '\"';
1002 memcpy(h, txn->cli_cookie, w);
1003 h += w;
1004 *(h++) = '\"';
1005 } else {
1006 if (h >= tmpline + sizeof(tmpline) - 5)
1007 goto trunc;
1008 memcpy(h, " \"-\"", 4);
1009 h += 4;
1010 }
1011
1012 if (txn->srv_cookie) {
1013 w = strlen(txn->srv_cookie);
1014 if (h >= tmpline + sizeof(tmpline) - 4 - w)
1015 goto trunc;
1016 *(h++) = ' ';
1017 *(h++) = '\"';
1018 memcpy(h, txn->srv_cookie, w);
1019 h += w;
1020 *(h++) = '\"';
1021 } else {
1022 if (h >= tmpline + sizeof(tmpline) - 5)
1023 goto trunc;
1024 memcpy(h, " \"-\"", 4);
1025 h += 4;
1026 }
1027
1028 if ((fe->to_log & LW_REQHDR) && txn->req.cap) {
1029 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1030 if (h >= sizeof (tmpline) + tmpline - 4)
1031 goto trunc;
Cyril Bonté7f2c5392010-03-13 15:15:07 +0100[diff] [blame]1032 if (txn->req.cap[hdr] != NULL) {
1033 *(h++) = ' ';
1034 *(h++) = '\"';
1035 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1036 '#', hdr_encode_map, txn->req.cap[hdr]);
1037 *(h++) = '\"';
1038 } else {
1039 memcpy(h, " \"-\"", 4);
1040 h += 4;
1041 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1042 }
1043 }
1044
1045 if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) {
1046 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1047 if (h >= sizeof (tmpline) + tmpline - 4)
1048 goto trunc;
Cyril Bonté7f2c5392010-03-13 15:15:07 +0100[diff] [blame]1049 if (txn->rsp.cap[hdr] != NULL) {
1050 *(h++) = ' ';
1051 *(h++) = '\"';
1052 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1053 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1054 *(h++) = '\"';
1055 } else {
1056 memcpy(h, " \"-\"", 4);
1057 h += 4;
1058 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1059 }
1060 }
1061
1062trunc:
1063 *h = '\0';
1064
1065 level = LOG_INFO;
1066 if (err && (fe->options2 & PR_O2_LOGERRORS))
1067 level = LOG_ERR;
1068
1069 send_log(prx_log, level, "%s\n", tmpline);
1070
1071 s->logs.logwait = 0;
1072}
1073
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1074/*
1075 * send a log for the session when we have enough info about it.
1076 * Will not log if the frontend has no log defined.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1077 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]1078void http_sess_log(struct session *s)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1079{
Cyril Bontéacd7d632010-11-01 19:26:02 +0100[diff] [blame]1080 char pn[INET6_ADDRSTRLEN];
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1081 struct proxy *fe = s->fe;
1082 struct proxy *be = s->be;
1083 struct proxy *prx_log;
1084 struct http_txn *txn = &s->txn;
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1085 int tolog, level, err;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1086 char *uri, *h;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1087 const char *svid;
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1088 struct tm tm;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1089 static char tmpline[MAX_SYSLOG_LEN];
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1090 int t_request;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1091 int hdr;
1092
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1093 /* if we don't want to log normal traffic, return now */
1094 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]1095 (s->req->cons->conn_retries != be->conn_retries) ||
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1096 txn->status >= 500;
1097 if (!err && (fe->options2 & PR_O2_NOLOGNORM))
1098 return;
1099
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1100 if (fe->logfac1 < 0 && fe->logfac2 < 0)
1101 return;
1102 prx_log = fe;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1103
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1104 if (prx_log->options2 & PR_O2_CLFLOG)
1105 return http_sess_clflog(s);
1106
Willy Tarreau631f01c2011-09-05 00:36:48 +0200[diff] [blame]1107 if (addr_to_str(&s->req->prod->addr.c.from, pn, sizeof(pn)) == AF_UNIX)
1108 snprintf(pn, sizeof(pn), "unix:%d", s->listener->luid);
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1109
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200[diff] [blame]1110 get_localtime(s->logs.accept_date.tv_sec, &tm);
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1111
1112 /* FIXME: let's limit ourselves to frontend logging for now. */
1113 tolog = fe->to_log;
1114
1115 h = tmpline;
1116 if (fe->to_log & LW_REQHDR &&
1117 txn->req.cap &&
1118 (h < tmpline + sizeof(tmpline) - 10)) {
1119 *(h++) = ' ';
1120 *(h++) = '{';
1121 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1122 if (hdr)
1123 *(h++) = '|';
1124 if (txn->req.cap[hdr] != NULL)
1125 h = encode_string(h, tmpline + sizeof(tmpline) - 7,
1126 '#', hdr_encode_map, txn->req.cap[hdr]);
1127 }
1128 *(h++) = '}';
1129 }
1130
1131 if (fe->to_log & LW_RSPHDR &&
1132 txn->rsp.cap &&
1133 (h < tmpline + sizeof(tmpline) - 7)) {
1134 *(h++) = ' ';
1135 *(h++) = '{';
1136 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1137 if (hdr)
1138 *(h++) = '|';
1139 if (txn->rsp.cap[hdr] != NULL)
1140 h = encode_string(h, tmpline + sizeof(tmpline) - 4,
1141 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1142 }
1143 *(h++) = '}';
1144 }
1145
1146 if (h < tmpline + sizeof(tmpline) - 4) {
1147 *(h++) = ' ';
1148 *(h++) = '"';
1149 uri = txn->uri ? txn->uri : "<BADREQ>";
1150 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
1151 '#', url_encode_map, uri);
1152 *(h++) = '"';
1153 }
1154 *h = '\0';
1155
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1156 if (!(tolog & LW_SVID))
1157 svid = "-";
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]1158 else switch (s->target.type) {
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1159 case TARG_TYPE_SERVER:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]1160 svid = s->target.ptr.s->id;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1161 break;
1162 case TARG_TYPE_APPLET:
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]1163 svid = s->target.ptr.a->name;
Willy Tarreau71904a42011-02-13 14:30:26 +0100[diff] [blame]1164 break;
1165 default:
1166 svid = "<NOSRV>";
1167 break;
1168 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1169
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1170 t_request = -1;
1171 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
1172 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
1173
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1174 level = LOG_INFO;
1175 if (err && (fe->options2 & PR_O2_LOGERRORS))
1176 level = LOG_ERR;
1177
1178 send_log(prx_log, level,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1179 "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1180 " %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld"
1181 " %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]1182 (s->req->prod->addr.c.from.ss_family == AF_UNIX) ? "unix" : pn,
1183 (s->req->prod->addr.c.from.ss_family == AF_UNIX) ? s->listener->luid :
Willy Tarreau86ad42c2011-08-27 12:29:07 +0200[diff] [blame]1184 get_host_port(&s->req->prod->addr.c.from),
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1185 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1186 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]1187 fe->id, be->id, svid,
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1188 t_request,
1189 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1190 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
1191 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
1192 (tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
1193 txn->status,
Willy Tarreau8b3977f2008-01-18 11:16:32 +0100[diff] [blame]1194 (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1195 txn->cli_cookie ? txn->cli_cookie : "-",
1196 txn->srv_cookie ? txn->srv_cookie : "-",
1197 sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
1198 sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
1199 (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
1200 (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]1201 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]1202 (s->flags & SN_REDISP)?"+":"",
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]1203 (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]1204 s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline);
1205
1206 s->logs.logwait = 0;
1207}
1208
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1209
1210/*
1211 * Capture headers from message starting at <som> according to header list
1212 * <cap_hdr>, and fill the <idx> structure appropriately.
1213 */
1214void capture_headers(char *som, struct hdr_idx *idx,
1215 char **cap, struct cap_hdr *cap_hdr)
1216{
1217 char *eol, *sol, *col, *sov;
1218 int cur_idx;
1219 struct cap_hdr *h;
1220 int len;
1221
1222 sol = som + hdr_idx_first_pos(idx);
1223 cur_idx = hdr_idx_first_idx(idx);
1224
1225 while (cur_idx) {
1226 eol = sol + idx->v[cur_idx].len;
1227
1228 col = sol;
1229 while (col < eol && *col != ':')
1230 col++;
1231
1232 sov = col + 1;
1233 while (sov < eol && http_is_lws[(unsigned char)*sov])
1234 sov++;
1235
1236 for (h = cap_hdr; h; h = h->next) {
1237 if ((h->namelen == col - sol) &&
1238 (strncasecmp(sol, h->name, h->namelen) == 0)) {
1239 if (cap[h->index] == NULL)
1240 cap[h->index] =
Willy Tarreaucf7f3202007-05-13 22:46:04 +0200[diff] [blame]1241 pool_alloc2(h->pool);
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1242
1243 if (cap[h->index] == NULL) {
1244 Alert("HTTP capture : out of memory.\n");
1245 continue;
1246 }
1247
1248 len = eol - sov;
1249 if (len > h->len)
1250 len = h->len;
1251
1252 memcpy(cap[h->index], sov, len);
1253 cap[h->index][len]=0;
1254 }
1255 }
1256 sol = eol + idx->v[cur_idx].cr + 1;
1257 cur_idx = idx->v[cur_idx].next;
1258 }
1259}
1260
1261
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1262/* either we find an LF at <ptr> or we jump to <bad>.
1263 */
1264#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
1265
1266/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
1267 * otherwise to <http_msg_ood> with <state> set to <st>.
1268 */
1269#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
1270 ptr++; \
1271 if (likely(ptr < end)) \
1272 goto good; \
1273 else { \
1274 state = (st); \
1275 goto http_msg_ood; \
1276 } \
1277 } while (0)
1278
1279
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1280/*
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1281 * This function parses a status line between <ptr> and <end>, starting with
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1282 * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
1283 * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
1284 * will give undefined results.
1285 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1286 * and that msg->sol points to the beginning of the response.
1287 * If a complete line is found (which implies that at least one CR or LF is
1288 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1289 * returned indicating an incomplete line (which does not mean that parts have
1290 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1291 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1292 * upon next call.
1293 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1294 * This function was intentionally designed to be called from
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1295 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1296 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1297 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1298 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1299const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
1300 unsigned int state, const char *ptr, const char *end,
1301 char **ret_ptr, unsigned int *ret_state)
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1302{
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1303 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1304 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1305 http_msg_rpver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1306 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1307 EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
1308
1309 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1310 msg->sl.st.v_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1311 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1312 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1313 state = HTTP_MSG_ERROR;
1314 break;
1315
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1316 case HTTP_MSG_RPVER_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1317 http_msg_rpver_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1318 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1319 msg->sl.st.c = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1320 goto http_msg_rpcode;
1321 }
1322 if (likely(HTTP_IS_SPHT(*ptr)))
1323 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1324 /* so it's a CR/LF, this is invalid */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1325 state = HTTP_MSG_ERROR;
1326 break;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1327
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1328 case HTTP_MSG_RPCODE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1329 http_msg_rpcode:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1330 if (likely(!HTTP_IS_LWS(*ptr)))
1331 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
1332
1333 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1334 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1335 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1336 }
1337
1338 /* so it's a CR/LF, so there is no reason phrase */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1339 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1340 http_msg_rsp_reason:
1341 /* FIXME: should we support HTTP responses without any reason phrase ? */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1342 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1343 msg->sl.st.r_l = 0;
1344 goto http_msg_rpline_eol;
1345
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1346 case HTTP_MSG_RPCODE_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1347 http_msg_rpcode_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1348 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1349 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1350 goto http_msg_rpreason;
1351 }
1352 if (likely(HTTP_IS_SPHT(*ptr)))
1353 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1354 /* so it's a CR/LF, so there is no reason phrase */
1355 goto http_msg_rsp_reason;
1356
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1357 case HTTP_MSG_RPREASON:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1358 http_msg_rpreason:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1359 if (likely(!HTTP_IS_CRLF(*ptr)))
1360 EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1361 msg->sl.st.r_l = (ptr - msg_buf) - msg->som - msg->sl.st.r;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1362 http_msg_rpline_eol:
1363 /* We have seen the end of line. Note that we do not
1364 * necessarily have the \n yet, but at least we know that we
1365 * have EITHER \r OR \n, otherwise the response would not be
1366 * complete. We can then record the response length and return
1367 * to the caller which will be able to register it.
1368 */
1369 msg->sl.st.l = ptr - msg->sol;
1370 return ptr;
1371
1372#ifdef DEBUG_FULL
1373 default:
1374 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1375 exit(1);
1376#endif
1377 }
1378
1379 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1380 /* out of valid data */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1381 if (ret_state)
1382 *ret_state = state;
1383 if (ret_ptr)
1384 *ret_ptr = (char *)ptr;
1385 return NULL;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1386}
1387
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1388/*
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1389 * This function parses a request line between <ptr> and <end>, starting with
1390 * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
1391 * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
1392 * will give undefined results.
1393 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1394 * and that msg->sol points to the beginning of the request.
1395 * If a complete line is found (which implies that at least one CR or LF is
1396 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1397 * returned indicating an incomplete line (which does not mean that parts have
1398 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1399 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1400 * upon next call.
1401 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1402 * This function was intentionally designed to be called from
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1403 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1404 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1405 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1406 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1407const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
1408 unsigned int state, const char *ptr, const char *end,
1409 char **ret_ptr, unsigned int *ret_state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1410{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1411 switch (state) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1412 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1413 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1414 if (likely(HTTP_IS_TOKEN(*ptr)))
1415 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1416
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1417 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1418 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1419 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1420 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1421
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1422 if (likely(HTTP_IS_CRLF(*ptr))) {
1423 /* HTTP 0.9 request */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1424 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1425 http_msg_req09_uri:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1426 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1427 http_msg_req09_uri_e:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1428 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1429 http_msg_req09_ver:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1430 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1431 msg->sl.rq.v_l = 0;
1432 goto http_msg_rqline_eol;
1433 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1434 state = HTTP_MSG_ERROR;
1435 break;
1436
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1437 case HTTP_MSG_RQMETH_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1438 http_msg_rqmeth_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1439 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1440 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1441 goto http_msg_rquri;
1442 }
1443 if (likely(HTTP_IS_SPHT(*ptr)))
1444 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1445 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1446 goto http_msg_req09_uri;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1447
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1448 case HTTP_MSG_RQURI:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1449 http_msg_rquri:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1450 if (likely(!HTTP_IS_LWS(*ptr)))
1451 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1452
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1453 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1454 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1455 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1456 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1457
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1458 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1459 goto http_msg_req09_uri_e;
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_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1462 http_msg_rquri_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1463 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1464 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1465 goto http_msg_rqver;
1466 }
1467 if (likely(HTTP_IS_SPHT(*ptr)))
1468 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1469 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1470 goto http_msg_req09_ver;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1471
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1472 case HTTP_MSG_RQVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1473 http_msg_rqver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1474 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1475 EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1476
1477 if (likely(HTTP_IS_CRLF(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1478 msg->sl.rq.v_l = (ptr - msg_buf) - msg->som - msg->sl.rq.v;
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1479 http_msg_rqline_eol:
1480 /* We have seen the end of line. Note that we do not
1481 * necessarily have the \n yet, but at least we know that we
1482 * have EITHER \r OR \n, otherwise the request would not be
1483 * complete. We can then record the request length and return
1484 * to the caller which will be able to register it.
1485 */
1486 msg->sl.rq.l = ptr - msg->sol;
1487 return ptr;
1488 }
1489
1490 /* neither an HTTP_VER token nor a CRLF */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1491 state = HTTP_MSG_ERROR;
1492 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1493
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1494#ifdef DEBUG_FULL
1495 default:
1496 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1497 exit(1);
1498#endif
1499 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1500
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1501 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1502 /* out of valid data */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1503 if (ret_state)
1504 *ret_state = state;
1505 if (ret_ptr)
1506 *ret_ptr = (char *)ptr;
1507 return NULL;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1508}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1509
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1510/*
1511 * Returns the data from Authorization header. Function may be called more
1512 * than once so data is stored in txn->auth_data. When no header is found
1513 * or auth method is unknown auth_method is set to HTTP_AUTH_WRONG to avoid
1514 * searching again for something we are unable to find anyway.
1515 */
1516
1517char get_http_auth_buff[BUFSIZE];
1518
1519int
1520get_http_auth(struct session *s)
1521{
1522
1523 struct http_txn *txn = &s->txn;
1524 struct chunk auth_method;
1525 struct hdr_ctx ctx;
1526 char *h, *p;
1527 int len;
1528
1529#ifdef DEBUG_AUTH
1530 printf("Auth for session %p: %d\n", s, txn->auth.method);
1531#endif
1532
1533 if (txn->auth.method == HTTP_AUTH_WRONG)
1534 return 0;
1535
1536 if (txn->auth.method)
1537 return 1;
1538
1539 txn->auth.method = HTTP_AUTH_WRONG;
1540
1541 ctx.idx = 0;
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]1542
1543 if (txn->flags & TX_USE_PX_CONN) {
1544 h = "Proxy-Authorization";
1545 len = strlen(h);
1546 } else {
1547 h = "Authorization";
1548 len = strlen(h);
1549 }
1550
1551 if (!http_find_header2(h, len, txn->req.sol, &txn->hdr_idx, &ctx))
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1552 return 0;
1553
1554 h = ctx.line + ctx.val;
1555
1556 p = memchr(h, ' ', ctx.vlen);
1557 if (!p || p == h)
1558 return 0;
1559
1560 chunk_initlen(&auth_method, h, 0, p-h);
1561 chunk_initlen(&txn->auth.method_data, p+1, 0, ctx.vlen-(p-h)-1);
1562
1563 if (!strncasecmp("Basic", auth_method.str, auth_method.len)) {
1564
1565 len = base64dec(txn->auth.method_data.str, txn->auth.method_data.len,
1566 get_http_auth_buff, BUFSIZE - 1);
1567
1568 if (len < 0)
1569 return 0;
1570
1571
1572 get_http_auth_buff[len] = '\0';
1573
1574 p = strchr(get_http_auth_buff, ':');
1575
1576 if (!p)
1577 return 0;
1578
1579 txn->auth.user = get_http_auth_buff;
1580 *p = '\0';
1581 txn->auth.pass = p+1;
1582
1583 txn->auth.method = HTTP_AUTH_BASIC;
1584 return 1;
1585 }
1586
1587 return 0;
1588}
1589
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1590
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1591/*
1592 * This function parses an HTTP message, either a request or a response,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1593 * depending on the initial msg->msg_state. It can be preempted everywhere
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1594 * when data are missing and recalled at the exact same location with no
1595 * information loss. The header index is re-initialized when switching from
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1596 * 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]1597 * fields. Note that msg->som and msg->sol will be initialized after completing
1598 * the first state, so that none of the msg pointers has to be initialized
1599 * prior to the first call.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1600 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1601void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx)
1602{
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1603 unsigned int state; /* updated only when leaving the FSM */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1604 register char *ptr, *end; /* request pointers, to avoid dereferences */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1605
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1606 state = msg->msg_state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1607 ptr = buf->lr;
1608 end = buf->r;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1609
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1610 if (unlikely(ptr >= end))
1611 goto http_msg_ood;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1612
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1613 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1614 /*
1615 * First, states that are specific to the response only.
1616 * We check them first so that request and headers are
1617 * closer to each other (accessed more often).
1618 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1619 case HTTP_MSG_RPBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1620 http_msg_rpbefore:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1621 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1622 /* we have a start of message, but we have to check
1623 * first if we need to remove some CRLF. We can only
1624 * do this when send_max=0.
1625 */
1626 char *beg = buf->w + buf->send_max;
1627 if (beg >= buf->data + buf->size)
1628 beg -= buf->size;
1629 if (unlikely(ptr != beg)) {
1630 if (buf->send_max)
1631 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1632 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1633 buffer_ignore(buf, ptr - beg);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1634 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1635 msg->som = ptr - buf->data;
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1636 msg->sol = ptr;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1637 hdr_idx_init(idx);
1638 state = HTTP_MSG_RPVER;
1639 goto http_msg_rpver;
1640 }
1641
1642 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1643 goto http_msg_invalid;
1644
1645 if (unlikely(*ptr == '\n'))
1646 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1647 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1648 /* stop here */
1649
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1650 case HTTP_MSG_RPBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1651 http_msg_rpbefore_cr:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1652 EXPECT_LF_HERE(ptr, http_msg_invalid);
1653 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1654 /* stop here */
1655
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1656 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1657 http_msg_rpver:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1658 case HTTP_MSG_RPVER_SP:
1659 case HTTP_MSG_RPCODE:
1660 case HTTP_MSG_RPCODE_SP:
1661 case HTTP_MSG_RPREASON:
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1662 ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1663 &buf->lr, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1664 if (unlikely(!ptr))
1665 return;
1666
1667 /* we have a full response and we know that we have either a CR
1668 * or an LF at <ptr>.
1669 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1670 //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]1671 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1672
1673 msg->sol = ptr;
1674 if (likely(*ptr == '\r'))
1675 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1676 goto http_msg_rpline_end;
1677
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1678 case HTTP_MSG_RPLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1679 http_msg_rpline_end:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1680 /* msg->sol must point to the first of CR or LF. */
1681 EXPECT_LF_HERE(ptr, http_msg_invalid);
1682 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1683 /* stop here */
1684
1685 /*
1686 * Second, states that are specific to the request only
1687 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1688 case HTTP_MSG_RQBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1689 http_msg_rqbefore:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1690 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1691 /* we have a start of message, but we have to check
1692 * first if we need to remove some CRLF. We can only
1693 * do this when send_max=0.
1694 */
1695 char *beg = buf->w + buf->send_max;
1696 if (beg >= buf->data + buf->size)
1697 beg -= buf->size;
1698 if (likely(ptr != beg)) {
1699 if (buf->send_max)
1700 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1701 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1702 buffer_ignore(buf, ptr - beg);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1703 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1704 msg->som = ptr - buf->data;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1705 msg->sol = ptr;
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1706 /* we will need this when keep-alive will be supported
1707 hdr_idx_init(idx);
1708 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1709 state = HTTP_MSG_RQMETH;
1710 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1711 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1712
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1713 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1714 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1715
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1716 if (unlikely(*ptr == '\n'))
1717 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1718 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1719 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1720
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1721 case HTTP_MSG_RQBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1722 http_msg_rqbefore_cr:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1723 EXPECT_LF_HERE(ptr, http_msg_invalid);
1724 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1725 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1726
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1727 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1728 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1729 case HTTP_MSG_RQMETH_SP:
1730 case HTTP_MSG_RQURI:
1731 case HTTP_MSG_RQURI_SP:
1732 case HTTP_MSG_RQVER:
1733 ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1734 &buf->lr, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1735 if (unlikely(!ptr))
1736 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1737
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1738 /* we have a full request and we know that we have either a CR
1739 * or an LF at <ptr>.
1740 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1741 //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]1742 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1743
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1744 msg->sol = ptr;
1745 if (likely(*ptr == '\r'))
1746 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1747 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1748
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1749 case HTTP_MSG_RQLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1750 http_msg_rqline_end:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1751 /* check for HTTP/0.9 request : no version information available.
1752 * msg->sol must point to the first of CR or LF.
1753 */
1754 if (unlikely(msg->sl.rq.v_l == 0))
1755 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1756
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1757 EXPECT_LF_HERE(ptr, http_msg_invalid);
1758 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1759 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1760
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1761 /*
1762 * Common states below
1763 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1764 case HTTP_MSG_HDR_FIRST:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1765 http_msg_hdr_first:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1766 msg->sol = ptr;
1767 if (likely(!HTTP_IS_CRLF(*ptr))) {
1768 goto http_msg_hdr_name;
1769 }
1770
1771 if (likely(*ptr == '\r'))
1772 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1773 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1774
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1775 case HTTP_MSG_HDR_NAME:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1776 http_msg_hdr_name:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1777 /* assumes msg->sol points to the first char */
1778 if (likely(HTTP_IS_TOKEN(*ptr)))
1779 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1780
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1781 if (likely(*ptr == ':')) {
1782 msg->col = ptr - buf->data;
1783 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
1784 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1785
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1786 if (likely(msg->err_pos < -1) || *ptr == '\n')
1787 goto http_msg_invalid;
1788
1789 if (msg->err_pos == -1) /* capture error pointer */
1790 msg->err_pos = ptr - buf->data; /* >= 0 now */
1791
1792 /* and we still accept this non-token character */
1793 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1794
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1795 case HTTP_MSG_HDR_L1_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1796 http_msg_hdr_l1_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1797 /* assumes msg->sol points to the first char and msg->col to the colon */
1798 if (likely(HTTP_IS_SPHT(*ptr)))
1799 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]1800
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1801 /* header value can be basically anything except CR/LF */
1802 msg->sov = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1803
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1804 if (likely(!HTTP_IS_CRLF(*ptr))) {
1805 goto http_msg_hdr_val;
1806 }
1807
1808 if (likely(*ptr == '\r'))
1809 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1810 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1811
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1812 case HTTP_MSG_HDR_L1_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1813 http_msg_hdr_l1_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1814 EXPECT_LF_HERE(ptr, http_msg_invalid);
1815 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]1816
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1817 case HTTP_MSG_HDR_L1_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1818 http_msg_hdr_l1_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1819 if (likely(HTTP_IS_SPHT(*ptr))) {
1820 /* replace HT,CR,LF with spaces */
1821 for (; buf->data+msg->sov < ptr; msg->sov++)
1822 buf->data[msg->sov] = ' ';
1823 goto http_msg_hdr_l1_sp;
1824 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1825 /* we had a header consisting only in spaces ! */
1826 msg->eol = buf->data + msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1827 goto http_msg_complete_header;
1828
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1829 case HTTP_MSG_HDR_VAL:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1830 http_msg_hdr_val:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1831 /* assumes msg->sol points to the first char, msg->col to the
1832 * colon, and msg->sov points to the first character of the
1833 * value.
1834 */
1835 if (likely(!HTTP_IS_CRLF(*ptr)))
1836 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1837
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1838 msg->eol = ptr;
1839 /* Note: we could also copy eol into ->eoh so that we have the
1840 * real header end in case it ends with lots of LWS, but is this
1841 * really needed ?
1842 */
1843 if (likely(*ptr == '\r'))
1844 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1845 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1846
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1847 case HTTP_MSG_HDR_L2_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1848 http_msg_hdr_l2_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1849 EXPECT_LF_HERE(ptr, http_msg_invalid);
1850 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]1851
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1852 case HTTP_MSG_HDR_L2_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1853 http_msg_hdr_l2_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1854 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1855 /* LWS: replace HT,CR,LF with spaces */
1856 for (; msg->eol < ptr; msg->eol++)
1857 *msg->eol = ' ';
1858 goto http_msg_hdr_val;
1859 }
1860 http_msg_complete_header:
1861 /*
1862 * It was a new header, so the last one is finished.
1863 * Assumes msg->sol points to the first char, msg->col to the
1864 * colon, msg->sov points to the first character of the value
1865 * and msg->eol to the first CR or LF so we know how the line
1866 * ends. We insert last header into the index.
1867 */
1868 /*
1869 fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
1870 write(2, msg->sol, msg->eol-msg->sol);
1871 fprintf(stderr,"\n");
1872 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1873
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1874 if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
1875 idx, idx->tail) < 0))
1876 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1877
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1878 msg->sol = ptr;
1879 if (likely(!HTTP_IS_CRLF(*ptr))) {
1880 goto http_msg_hdr_name;
1881 }
1882
1883 if (likely(*ptr == '\r'))
1884 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1885 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1886
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1887 case HTTP_MSG_LAST_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1888 http_msg_last_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1889 /* Assumes msg->sol points to the first of either CR or LF */
1890 EXPECT_LF_HERE(ptr, http_msg_invalid);
1891 ptr++;
1892 buf->lr = ptr;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1893 msg->col = msg->sov = buf->lr - buf->data;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1894 msg->eoh = msg->sol - buf->data;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1895 msg->sol = buf->data + msg->som;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1896 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1897 return;
1898#ifdef DEBUG_FULL
1899 default:
1900 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1901 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1902#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1903 }
1904 http_msg_ood:
1905 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1906 msg->msg_state = state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1907 buf->lr = ptr;
1908 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1909
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1910 http_msg_invalid:
1911 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1912 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1913 buf->lr = ptr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1914 return;
1915}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1916
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1917/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1918 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1919 * nothing is done and 1 is returned.
1920 */
1921static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
1922{
1923 int delta;
1924 char *cur_end;
1925
1926 if (msg->sl.rq.v_l != 0)
1927 return 1;
1928
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1929 cur_end = msg->sol + msg->sl.rq.l;
1930 delta = 0;
1931
1932 if (msg->sl.rq.u_l == 0) {
1933 /* if no URI was set, add "/" */
1934 delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
1935 cur_end += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1936 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1937 }
1938 /* add HTTP version */
1939 delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1940 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1941 cur_end += delta;
1942 cur_end = (char *)http_parse_reqline(msg, req->data,
1943 HTTP_MSG_RQMETH,
1944 msg->sol, cur_end + 1,
1945 NULL, NULL);
1946 if (unlikely(!cur_end))
1947 return 0;
1948
1949 /* we have a full HTTP/1.0 request now and we know that
1950 * we have either a CR or an LF at <ptr>.
1951 */
1952 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1953 return 1;
1954}
1955
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1956/* Parse the Connection: header of an HTTP request, looking for both "close"
1957 * and "keep-alive" values. If a buffer is provided and we already know that
1958 * some headers may safely be removed, we remove them now. The <to_del> flags
1959 * are used for that :
1960 * - bit 0 means remove "close" headers (in HTTP/1.0 requests/responses)
1961 * - bit 1 means remove "keep-alive" headers (in HTTP/1.1 reqs/resp to 1.1).
1962 * The TX_HDR_CONN_* flags are adjusted in txn->flags depending on what was
1963 * found, and TX_CON_*_SET is adjusted depending on what is left so only
1964 * harmless combinations may be removed. Do not call that after changes have
1965 * been processed. If unused, the buffer can be NULL, and no data will be
1966 * changed.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1967 */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1968void 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]1969{
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1970 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1971 const char *hdr_val = "Connection";
1972 int hdr_len = 10;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1973
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1974 if (txn->flags & TX_HDR_CONN_PRS)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1975 return;
1976
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1977 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1978 hdr_val = "Proxy-Connection";
1979 hdr_len = 16;
1980 }
1981
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1982 ctx.idx = 0;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1983 txn->flags &= ~(TX_CON_KAL_SET|TX_CON_CLO_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1984 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1985 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
1986 txn->flags |= TX_HDR_CONN_KAL;
1987 if ((to_del & 2) && buf)
1988 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
1989 else
1990 txn->flags |= TX_CON_KAL_SET;
1991 }
1992 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
1993 txn->flags |= TX_HDR_CONN_CLO;
1994 if ((to_del & 1) && buf)
1995 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
1996 else
1997 txn->flags |= TX_CON_CLO_SET;
1998 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1999 }
2000
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2001 txn->flags |= TX_HDR_CONN_PRS;
2002 return;
2003}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2004
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2005/* Apply desired changes on the Connection: header. Values may be removed and/or
2006 * added depending on the <wanted> flags, which are exclusively composed of
2007 * TX_CON_CLO_SET and TX_CON_KAL_SET, depending on what flags are desired. The
2008 * TX_CON_*_SET flags are adjusted in txn->flags depending on what is left.
2009 */
2010void http_change_connection_header(struct http_txn *txn, struct http_msg *msg, struct buffer *buf, int wanted)
2011{
2012 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2013 const char *hdr_val = "Connection";
2014 int hdr_len = 10;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2015
2016 ctx.idx = 0;
2017
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2018
2019 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2020 hdr_val = "Proxy-Connection";
2021 hdr_len = 16;
2022 }
2023
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2024 txn->flags &= ~(TX_CON_CLO_SET | TX_CON_KAL_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2025 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2026 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
2027 if (wanted & TX_CON_KAL_SET)
2028 txn->flags |= TX_CON_KAL_SET;
2029 else
2030 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2031 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2032 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
2033 if (wanted & TX_CON_CLO_SET)
2034 txn->flags |= TX_CON_CLO_SET;
2035 else
2036 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2037 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2038 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2039
2040 if (wanted == (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
2041 return;
2042
2043 if ((wanted & TX_CON_CLO_SET) && !(txn->flags & TX_CON_CLO_SET)) {
2044 txn->flags |= TX_CON_CLO_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2045 hdr_val = "Connection: close";
2046 hdr_len = 17;
2047 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2048 hdr_val = "Proxy-Connection: close";
2049 hdr_len = 23;
2050 }
2051 http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2052 }
2053
2054 if ((wanted & TX_CON_KAL_SET) && !(txn->flags & TX_CON_KAL_SET)) {
2055 txn->flags |= TX_CON_KAL_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2056 hdr_val = "Connection: keep-alive";
2057 hdr_len = 22;
2058 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2059 hdr_val = "Proxy-Connection: keep-alive";
2060 hdr_len = 28;
2061 }
2062 http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2063 }
2064 return;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2065}
2066
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2067/* Parse the chunk size at buf->lr. Once done, it adjusts ->lr to point to the
2068 * first byte of body, and increments msg->sov by the number of bytes parsed,
2069 * so that we know we can forward between ->som and ->sov. Note that due to
2070 * possible wrapping at the end of the buffer, it is possible that msg->sov is
2071 * lower than msg->som.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2072 * Return >0 on success, 0 when some data is missing, <0 on error.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2073 * 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]2074 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2075int http_parse_chunk_size(struct buffer *buf, struct http_msg *msg)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2076{
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2077 char *ptr = buf->lr;
2078 char *end = buf->data + buf->size;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2079 unsigned int chunk = 0;
2080
2081 /* The chunk size is in the following form, though we are only
2082 * interested in the size and CRLF :
2083 * 1*HEXDIGIT *WSP *[ ';' extensions ] CRLF
2084 */
2085 while (1) {
2086 int c;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2087 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2088 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2089 c = hex2i(*ptr);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2090 if (c < 0) /* not a hex digit anymore */
2091 break;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2092 if (++ptr >= end)
2093 ptr = buf->data;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2094 if (chunk & 0xF000000) /* overflow will occur */
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2095 goto error;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2096 chunk = (chunk << 4) + c;
2097 }
2098
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2099 /* empty size not allowed */
2100 if (ptr == buf->lr)
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2101 goto error;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2102
2103 while (http_is_spht[(unsigned char)*ptr]) {
2104 if (++ptr >= end)
2105 ptr = buf->data;
2106 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2107 return 0;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2108 }
2109
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2110 /* Up to there, we know that at least one byte is present at *ptr. Check
2111 * for the end of chunk size.
2112 */
2113 while (1) {
2114 if (likely(HTTP_IS_CRLF(*ptr))) {
2115 /* we now have a CR or an LF at ptr */
2116 if (likely(*ptr == '\r')) {
2117 if (++ptr >= end)
2118 ptr = buf->data;
2119 if (ptr == buf->r)
2120 return 0;
2121 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2122
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2123 if (*ptr != '\n')
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2124 goto error;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2125 if (++ptr >= end)
2126 ptr = buf->data;
2127 /* done */
2128 break;
2129 }
2130 else if (*ptr == ';') {
2131 /* chunk extension, ends at next CRLF */
2132 if (++ptr >= end)
2133 ptr = buf->data;
2134 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2135 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2136
2137 while (!HTTP_IS_CRLF(*ptr)) {
2138 if (++ptr >= end)
2139 ptr = buf->data;
2140 if (ptr == buf->r)
2141 return 0;
2142 }
2143 /* we have a CRLF now, loop above */
2144 continue;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2145 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2146 else
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2147 goto error;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2148 }
2149
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2150 /* OK we found our CRLF and now <ptr> points to the next byte,
2151 * which may or may not be present. We save that into ->lr and
2152 * ->sov.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2153 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2154 msg->sov += ptr - buf->lr;
2155 buf->lr = ptr;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2156 msg->chunk_len = chunk;
2157 msg->body_len += chunk;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2158 msg->msg_state = chunk ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2159 return 1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2160 error:
2161 msg->err_pos = ptr - buf->data;
2162 return -1;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2163}
2164
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2165/* This function skips trailers in the buffer <buf> associated with HTTP
2166 * message <msg>. The first visited position is buf->lr. If the end of
2167 * the trailers is found, it is automatically scheduled to be forwarded,
2168 * msg->msg_state switches to HTTP_MSG_DONE, and the function returns >0.
2169 * If not enough data are available, the function does not change anything
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2170 * except maybe buf->lr and msg->sov if it could parse some lines, and returns
2171 * zero. If a parse error is encountered, the function returns < 0 and does not
2172 * change anything except maybe buf->lr and msg->sov. Note that the message
2173 * must already be in HTTP_MSG_TRAILERS state before calling this function,
2174 * which implies that all non-trailers data have already been scheduled for
2175 * forwarding, and that the difference between msg->som and msg->sov exactly
2176 * matches the length of trailers already parsed and not forwarded. It is also
2177 * important to note that this function is designed to be able to parse wrapped
2178 * headers at end of buffer.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2179 */
2180int http_forward_trailers(struct buffer *buf, struct http_msg *msg)
2181{
2182 /* we have buf->lr which points to next line. Look for CRLF. */
2183 while (1) {
2184 char *p1 = NULL, *p2 = NULL;
2185 char *ptr = buf->lr;
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2186 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2187
2188 /* scan current line and stop at LF or CRLF */
2189 while (1) {
2190 if (ptr == buf->r)
2191 return 0;
2192
2193 if (*ptr == '\n') {
2194 if (!p1)
2195 p1 = ptr;
2196 p2 = ptr;
2197 break;
2198 }
2199
2200 if (*ptr == '\r') {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2201 if (p1) {
2202 msg->err_pos = ptr - buf->data;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2203 return -1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2204 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2205 p1 = ptr;
2206 }
2207
2208 ptr++;
2209 if (ptr >= buf->data + buf->size)
2210 ptr = buf->data;
2211 }
2212
2213 /* after LF; point to beginning of next line */
2214 p2++;
2215 if (p2 >= buf->data + buf->size)
2216 p2 = buf->data;
2217
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2218 bytes = p2 - buf->lr;
2219 if (bytes < 0)
2220 bytes += buf->size;
2221
2222 /* schedule this line for forwarding */
2223 msg->sov += bytes;
2224 if (msg->sov >= buf->size)
2225 msg->sov -= buf->size;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2226
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2227 if (p1 == buf->lr) {
2228 /* LF/CRLF at beginning of line => end of trailers at p2.
2229 * Everything was scheduled for forwarding, there's nothing
2230 * left from this message.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]2231 */
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2232 buf->lr = p2;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2233 msg->msg_state = HTTP_MSG_DONE;
2234 return 1;
2235 }
2236 /* OK, next line then */
2237 buf->lr = p2;
2238 }
2239}
2240
2241/* This function may be called only in HTTP_MSG_DATA_CRLF. It reads the CRLF or
2242 * a possible LF alone at the end of a chunk. It automatically adjusts msg->sov,
2243 * ->som, buf->lr in order to include this part into the next forwarding phase.
2244 * It also sets msg_state to HTTP_MSG_CHUNK_SIZE and returns >0 on success. If
2245 * not enough data are available, the function does not change anything and
2246 * returns zero. If a parse error is encountered, the function returns < 0 and
2247 * does not change anything. Note: this function is designed to parse wrapped
2248 * CRLF at the end of the buffer.
2249 */
2250int http_skip_chunk_crlf(struct buffer *buf, struct http_msg *msg)
2251{
2252 char *ptr;
2253 int bytes;
2254
2255 /* NB: we'll check data availabilty at the end. It's not a
2256 * problem because whatever we match first will be checked
2257 * against the correct length.
2258 */
2259 bytes = 1;
2260 ptr = buf->lr;
2261 if (*ptr == '\r') {
2262 bytes++;
2263 ptr++;
2264 if (ptr >= buf->data + buf->size)
2265 ptr = buf->data;
2266 }
2267
Willy Tarreaubf3f1de2010-03-17 15:54:24 +0100[diff] [blame]2268 if (bytes > buf->l - buf->send_max)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2269 return 0;
2270
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2271 if (*ptr != '\n') {
2272 msg->err_pos = ptr - buf->data;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2273 return -1;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]2274 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2275
2276 ptr++;
2277 if (ptr >= buf->data + buf->size)
2278 ptr = buf->data;
2279 buf->lr = ptr;
2280 /* prepare the CRLF to be forwarded. msg->som may be before data but we don't care */
2281 msg->sov = ptr - buf->data;
2282 msg->som = msg->sov - bytes;
2283 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
2284 return 1;
2285}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2286
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2287void http_buffer_heavy_realign(struct buffer *buf, struct http_msg *msg)
2288{
2289 char *end = buf->data + buf->size;
2290 int off = buf->data + buf->size - buf->w;
2291
2292 /* two possible cases :
2293 * - the buffer is in one contiguous block, we move it in-place
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2294 * - the buffer is in two blocks, we move it via the swap_buffer
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2295 */
2296 if (buf->l) {
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2297 int block1 = buf->l;
2298 int block2 = 0;
2299 if (buf->r <= buf->w) {
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2300 /* non-contiguous block */
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2301 block1 = buf->data + buf->size - buf->w;
2302 block2 = buf->r - buf->data;
2303 }
2304 if (block2)
2305 memcpy(swap_buffer, buf->data, block2);
2306 memmove(buf->data, buf->w, block1);
2307 if (block2)
2308 memcpy(buf->data + block1, swap_buffer, block2);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2309 }
2310
2311 /* adjust all known pointers */
2312 buf->w = buf->data;
2313 buf->lr += off; if (buf->lr >= end) buf->lr -= buf->size;
2314 buf->r += off; if (buf->r >= end) buf->r -= buf->size;
2315 msg->sol += off; if (msg->sol >= end) msg->sol -= buf->size;
2316 msg->eol += off; if (msg->eol >= end) msg->eol -= buf->size;
2317
2318 /* adjust relative pointers */
2319 msg->som = 0;
2320 msg->eoh += off; if (msg->eoh >= buf->size) msg->eoh -= buf->size;
2321 msg->col += off; if (msg->col >= buf->size) msg->col -= buf->size;
2322 msg->sov += off; if (msg->sov >= buf->size) msg->sov -= buf->size;
2323
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2324 if (msg->err_pos >= 0) {
2325 msg->err_pos += off;
2326 if (msg->err_pos >= buf->size)
2327 msg->err_pos -= buf->size;
2328 }
2329
2330 buf->flags &= ~BF_FULL;
2331 if (buf->l >= buffer_max_len(buf))
2332 buf->flags |= BF_FULL;
2333}
2334
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2335/* This stream analyser waits for a complete HTTP request. It returns 1 if the
2336 * processing can continue on next analysers, or zero if it either needs more
2337 * data or wants to immediately abort the request (eg: timeout, error, ...). It
2338 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
2339 * when it has nothing left to do, and may remove any analyser when it wants to
2340 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2341 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2342int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2343{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2344 /*
2345 * We will parse the partial (or complete) lines.
2346 * We will check the request syntax, and also join multi-line
2347 * headers. An index of all the lines will be elaborated while
2348 * parsing.
2349 *
2350 * For the parsing, we use a 28 states FSM.
2351 *
2352 * Here is the information we currently have :
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2353 * req->data + msg->som = beginning of request
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2354 * req->data + msg->eoh = end of processed headers / start of current one
2355 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2356 * req->lr = first non-visited byte
2357 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2358 *
2359 * At end of parsing, we may perform a capture of the error (if any), and
2360 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
2361 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
2362 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2363 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2364
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2365 int cur_idx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2366 int use_close_only;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2367 struct http_txn *txn = &s->txn;
2368 struct http_msg *msg = &txn->req;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2369 struct hdr_ctx ctx;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2370
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]2371 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2372 now_ms, __FUNCTION__,
2373 s,
2374 req,
2375 req->rex, req->wex,
2376 req->flags,
2377 req->l,
2378 req->analysers);
2379
Willy Tarreau52a0c602009-08-16 22:45:38 +0200[diff] [blame]2380 /* we're speaking HTTP here, so let's speak HTTP to the client */
2381 s->srv_error = http_return_srv_error;
2382
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2383 /* There's a protected area at the end of the buffer for rewriting
2384 * purposes. We don't want to start to parse the request if the
2385 * protected area is affected, because we may have to move processed
2386 * data later, which is much more complicated.
2387 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2388 if (req->l && msg->msg_state < HTTP_MSG_ERROR) {
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2389 if ((txn->flags & TX_NOT_FIRST) &&
2390 unlikely((req->flags & BF_FULL) ||
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2391 req->r < req->lr ||
2392 req->r > req->data + req->size - global.tune.maxrewrite)) {
2393 if (req->send_max) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2394 if (req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2395 goto failed_keep_alive;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2396 /* some data has still not left the buffer, wake us once that's done */
2397 buffer_dont_connect(req);
2398 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
2399 return 0;
2400 }
Willy Tarreau0499e352010-12-17 07:13:42 +0100[diff] [blame]2401 if (req->r < req->lr || req->r > req->data + req->size - global.tune.maxrewrite)
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2402 http_buffer_heavy_realign(req, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2403 }
2404
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2405 /* Note that we have the same problem with the response ; we
2406 * may want to send a redirect, error or anything which requires
2407 * some spare space. So we'll ensure that we have at least
2408 * maxrewrite bytes available in the response buffer before
2409 * processing that one. This will only affect pipelined
2410 * keep-alive requests.
2411 */
2412 if ((txn->flags & TX_NOT_FIRST) &&
2413 unlikely((s->rep->flags & BF_FULL) ||
2414 s->rep->r < s->rep->lr ||
2415 s->rep->r > s->rep->data + s->rep->size - global.tune.maxrewrite)) {
2416 if (s->rep->send_max) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2417 if (s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2418 goto failed_keep_alive;
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2419 /* don't let a connection request be initiated */
2420 buffer_dont_connect(req);
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2421 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau0499e352010-12-17 07:13:42 +0100[diff] [blame]2422 s->rep->analysers |= an_bit; /* wake us up once it changes */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2423 return 0;
2424 }
2425 }
2426
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2427 if (likely(req->lr < req->r))
2428 http_msg_analyzer(req, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2429 }
2430
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2431 /* 1: we might have to print this header in debug mode */
2432 if (unlikely((global.mode & MODE_DEBUG) &&
2433 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]2434 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2435 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2436 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2437
Willy Tarreau663308b2010-06-07 14:06:08 +0200[diff] [blame]2438 sol = req->data + msg->som;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2439 eol = sol + msg->sl.rq.l;
2440 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2441
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2442 sol += hdr_idx_first_pos(&txn->hdr_idx);
2443 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2444
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2445 while (cur_idx) {
2446 eol = sol + txn->hdr_idx.v[cur_idx].len;
2447 debug_hdr("clihdr", s, sol, eol);
2448 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2449 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2450 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2451 }
2452
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2453
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2454 /*
2455 * Now we quickly check if we have found a full valid request.
2456 * If not so, we check the FD and buffer states before leaving.
2457 * A full request is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2458 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2459 * requests are checked first. When waiting for a second request
2460 * on a keep-alive session, if we encounter and error, close, t/o,
2461 * we note the error in the session flags but don't set any state.
2462 * Since the error will be noted there, it will not be counted by
2463 * process_session() as a frontend error.
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2464 * Last, we may increase some tracked counters' http request errors on
2465 * the cases that are deliberately the client's fault. For instance,
2466 * a timeout or connection reset is not counted as an error. However
2467 * a bad request is.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2468 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2469
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2470 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2471 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2472 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2473 */
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2474 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2475 session_inc_http_req_ctr(s);
2476 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2477 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2478 goto return_bad_req;
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2479 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2480
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2481 /* 1: Since we are in header mode, if there's no space
2482 * left for headers, we won't be able to free more
2483 * later, so the session will never terminate. We
2484 * must terminate it now.
2485 */
2486 if (unlikely(req->flags & BF_FULL)) {
2487 /* FIXME: check if URI is set and return Status
2488 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2489 */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2490 session_inc_http_req_ctr(s);
2491 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2492 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2493 goto return_bad_req;
2494 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2495
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2496 /* 2: have we encountered a read error ? */
2497 else if (req->flags & BF_READ_ERROR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2498 if (!(s->flags & SN_ERR_MASK))
2499 s->flags |= SN_ERR_CLICL;
2500
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2501 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2502 goto failed_keep_alive;
2503
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2504 /* we cannot return any message on error */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2505 if (msg->err_pos >= 0) {
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2506 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]2507 session_inc_http_err_ctr(s);
2508 }
2509
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2510 msg->msg_state = HTTP_MSG_ERROR;
2511 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2512
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2513 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2514 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2515 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2516 if (s->listener->counters)
2517 s->listener->counters->failed_req++;
2518
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2519 if (!(s->flags & SN_FINST_MASK))
2520 s->flags |= SN_FINST_R;
2521 return 0;
2522 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2523
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2524 /* 3: has the read timeout expired ? */
2525 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]2526 if (!(s->flags & SN_ERR_MASK))
2527 s->flags |= SN_ERR_CLITO;
2528
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2529 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2530 goto failed_keep_alive;
2531
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2532 /* read timeout : give up with an error message. */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2533 if (msg->err_pos >= 0) {
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2534 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]2535 session_inc_http_err_ctr(s);
2536 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2537 txn->status = 408;
2538 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
2539 msg->msg_state = HTTP_MSG_ERROR;
2540 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2541
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2542 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2543 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2544 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2545 if (s->listener->counters)
2546 s->listener->counters->failed_req++;
2547
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2548 if (!(s->flags & SN_FINST_MASK))
2549 s->flags |= SN_FINST_R;
2550 return 0;
2551 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2552
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2553 /* 4: have we encountered a close ? */
2554 else if (req->flags & BF_SHUTR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2555 if (!(s->flags & SN_ERR_MASK))
2556 s->flags |= SN_ERR_CLICL;
2557
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2558 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2559 goto failed_keep_alive;
2560
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2561 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2562 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]2563 txn->status = 400;
2564 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2565 msg->msg_state = HTTP_MSG_ERROR;
2566 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2567
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2568 session_inc_http_err_ctr(s);
2569 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2570 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2571 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2572 if (s->listener->counters)
2573 s->listener->counters->failed_req++;
2574
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2575 if (!(s->flags & SN_FINST_MASK))
2576 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2577 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2578 }
2579
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2580 buffer_dont_connect(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2581 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2582 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2583
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2584 if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) {
2585 /* If the client starts to talk, let's fall back to
2586 * request timeout processing.
2587 */
2588 txn->flags &= ~TX_WAIT_NEXT_RQ;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2589 req->analyse_exp = TICK_ETERNITY;
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2590 }
2591
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2592 /* just set the request timeout once at the beginning of the request */
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2593 if (!tick_isset(req->analyse_exp)) {
2594 if ((msg->msg_state == HTTP_MSG_RQBEFORE) &&
2595 (txn->flags & TX_WAIT_NEXT_RQ) &&
2596 tick_isset(s->be->timeout.httpka))
2597 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
2598 else
2599 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
2600 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2601
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2602 /* we're not ready yet */
2603 return 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2604
2605 failed_keep_alive:
2606 /* Here we process low-level errors for keep-alive requests. In
2607 * short, if the request is not the first one and it experiences
2608 * a timeout, read error or shutdown, we just silently close so
2609 * that the client can try again.
2610 */
2611 txn->status = 0;
2612 msg->msg_state = HTTP_MSG_RQBEFORE;
2613 req->analysers = 0;
2614 s->logs.logwait = 0;
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2615 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]2616 stream_int_retnclose(req->prod, NULL);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2617 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2618 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2619
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2620 /* OK now we have a complete HTTP request with indexed headers. Let's
2621 * complete the request parsing by setting a few fields we will need
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]2622 * later. At this point, we have the last CRLF at req->data + msg->eoh.
2623 * If the request is in HTTP/0.9 form, the rule is still true, and eoh
2624 * points to the CRLF of the request line. req->lr points to the first
2625 * byte after the last LF. msg->col and msg->sov point to the first
2626 * byte of data. msg->eol cannot be trusted because it may have been
2627 * left uninitialized (for instance in the absence of headers).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2628 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]2629
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2630 session_inc_http_req_ctr(s);
Willy Tarreaud9b587f2010-02-26 10:05:55 +0100[diff] [blame]2631 proxy_inc_fe_req_ctr(s->fe); /* one more valid request for this FE */
2632
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2633 if (txn->flags & TX_WAIT_NEXT_RQ) {
2634 /* kill the pending keep-alive timeout */
2635 txn->flags &= ~TX_WAIT_NEXT_RQ;
2636 req->analyse_exp = TICK_ETERNITY;
2637 }
2638
2639
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2640 /* Maybe we found in invalid header name while we were configured not
2641 * to block on that, so we have to capture it now.
2642 */
2643 if (unlikely(msg->err_pos >= 0))
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2644 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]2645
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2646 /*
2647 * 1: identify the method
2648 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2649 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2650
2651 /* we can make use of server redirect on GET and HEAD */
2652 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
2653 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2654
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2655 /*
2656 * 2: check if the URI matches the monitor_uri.
2657 * We have to do this for every request which gets in, because
2658 * the monitor-uri is defined by the frontend.
2659 */
2660 if (unlikely((s->fe->monitor_uri_len != 0) &&
2661 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2662 !memcmp(msg->sol + msg->sl.rq.u,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2663 s->fe->monitor_uri,
2664 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2665 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2666 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2667 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2668 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2669
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2670 s->flags |= SN_MONITOR;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2671
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2672 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2673 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
2674 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2675
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2676 ret = acl_pass(ret);
2677 if (cond->pol == ACL_COND_UNLESS)
2678 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2679
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2680 if (ret) {
2681 /* we fail this request, let's return 503 service unavail */
2682 txn->status = 503;
2683 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
2684 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2685 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2686 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]2687
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2688 /* nothing to fail, let's reply normaly */
2689 txn->status = 200;
Willy Tarreauae94d4d2011-05-11 16:28:49 +0200[diff] [blame]2690 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_200));
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2691 goto return_prx_cond;
2692 }
2693
2694 /*
2695 * 3: Maybe we have to copy the original REQURI for the logs ?
2696 * Note: we cannot log anymore if the request has been
2697 * classified as invalid.
2698 */
2699 if (unlikely(s->logs.logwait & LW_REQ)) {
2700 /* we have a complete HTTP request that we must log */
2701 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
2702 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2703
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2704 if (urilen >= REQURI_LEN)
2705 urilen = REQURI_LEN - 1;
2706 memcpy(txn->uri, &req->data[msg->som], urilen);
2707 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2708
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2709 if (!(s->logs.logwait &= ~LW_REQ))
2710 s->do_log(s);
2711 } else {
2712 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2713 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2714 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2715
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2716 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]2717 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
2718 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2719
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2720 /* ... and check if the request is HTTP/1.1 or above */
2721 if ((msg->sl.rq.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2722 ((msg->sol[msg->sl.rq.v + 5] > '1') ||
2723 ((msg->sol[msg->sl.rq.v + 5] == '1') &&
2724 (msg->sol[msg->sl.rq.v + 7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2725 txn->flags |= TX_REQ_VER_11;
2726
2727 /* "connection" has not been parsed yet */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2728 txn->flags &= ~(TX_HDR_CONN_PRS | TX_HDR_CONN_CLO | TX_HDR_CONN_KAL);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2729
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2730 /* if the frontend has "option http-use-proxy-header", we'll check if
2731 * we have what looks like a proxied connection instead of a connection,
2732 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
2733 * Note that this is *not* RFC-compliant, however browsers and proxies
2734 * happen to do that despite being non-standard :-(
2735 * We consider that a request not beginning with either '/' or '*' is
2736 * a proxied connection, which covers both "scheme://location" and
2737 * CONNECT ip:port.
2738 */
2739 if ((s->fe->options2 & PR_O2_USE_PXHDR) &&
2740 msg->sol[msg->sl.rq.u] != '/' && msg->sol[msg->sl.rq.u] != '*')
2741 txn->flags |= TX_USE_PX_CONN;
2742
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2743 /* transfer length unknown*/
2744 txn->flags &= ~TX_REQ_XFER_LEN;
2745
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2746 /* 5: we may need to capture headers */
2747 if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2748 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2749 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2750
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2751 /* 6: determine the transfer-length.
2752 * According to RFC2616 #4.4, amended by the HTTPbis working group,
2753 * the presence of a message-body in a REQUEST and its transfer length
2754 * must be determined that way (in order of precedence) :
2755 * 1. The presence of a message-body in a request is signaled by the
2756 * inclusion of a Content-Length or Transfer-Encoding header field
2757 * in the request's header fields. When a request message contains
2758 * both a message-body of non-zero length and a method that does
2759 * not define any semantics for that request message-body, then an
2760 * origin server SHOULD either ignore the message-body or respond
2761 * with an appropriate error message (e.g., 413). A proxy or
2762 * gateway, when presented the same request, SHOULD either forward
2763 * the request inbound with the message- body or ignore the
2764 * message-body when determining a response.
2765 *
2766 * 2. If a Transfer-Encoding header field (Section 9.7) is present
2767 * and the "chunked" transfer-coding (Section 6.2) is used, the
2768 * transfer-length is defined by the use of this transfer-coding.
2769 * If a Transfer-Encoding header field is present and the "chunked"
2770 * transfer-coding is not present, the transfer-length is defined
2771 * by the sender closing the connection.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2772 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2773 * 3. If a Content-Length header field is present, its decimal value in
2774 * OCTETs represents both the entity-length and the transfer-length.
2775 * If a message is received with both a Transfer-Encoding header
2776 * field and a Content-Length header field, the latter MUST be ignored.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2777 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2778 * 4. By the server closing the connection. (Closing the connection
2779 * cannot be used to indicate the end of a request body, since that
2780 * would leave no possibility for the server to send back a response.)
2781 *
2782 * Whenever a transfer-coding is applied to a message-body, the set of
2783 * transfer-codings MUST include "chunked", unless the message indicates
2784 * it is terminated by closing the connection. When the "chunked"
2785 * transfer-coding is used, it MUST be the last transfer-coding applied
2786 * to the message-body.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2787 */
2788
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2789 use_close_only = 0;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2790 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2791 /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]2792 while ((txn->flags & TX_REQ_VER_11) &&
2793 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2794 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
2795 txn->flags |= (TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2796 else if (txn->flags & TX_REQ_TE_CHNK) {
2797 /* bad transfer-encoding (chunked followed by something else) */
2798 use_close_only = 1;
2799 txn->flags &= ~(TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2800 break;
2801 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2802 }
2803
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2804 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2805 while (!(txn->flags & TX_REQ_TE_CHNK) && !use_close_only &&
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2806 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
2807 signed long long cl;
2808
2809 if (!ctx.vlen)
2810 goto return_bad_req;
2811
2812 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
2813 goto return_bad_req; /* parse failure */
2814
2815 if (cl < 0)
2816 goto return_bad_req;
2817
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2818 if ((txn->flags & TX_REQ_CNT_LEN) && (msg->chunk_len != cl))
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2819 goto return_bad_req; /* already specified, was different */
2820
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2821 txn->flags |= TX_REQ_CNT_LEN | TX_REQ_XFER_LEN;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2822 msg->body_len = msg->chunk_len = cl;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2823 }
2824
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2825 /* bodyless requests have a known length */
2826 if (!use_close_only)
2827 txn->flags |= TX_REQ_XFER_LEN;
2828
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2829 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2830 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2831 req->analyse_exp = TICK_ETERNITY;
2832 return 1;
2833
2834 return_bad_req:
2835 /* We centralize bad requests processing here */
2836 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2837 /* we detected a parsing error. We want to archive this request
2838 * in the dedicated proxy area for later troubleshooting.
2839 */
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]2840 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]2841 }
2842
2843 txn->req.msg_state = HTTP_MSG_ERROR;
2844 txn->status = 400;
2845 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2846
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]2847 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2848 if (s->listener->counters)
2849 s->listener->counters->failed_req++;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2850
2851 return_prx_cond:
2852 if (!(s->flags & SN_ERR_MASK))
2853 s->flags |= SN_ERR_PRXCOND;
2854 if (!(s->flags & SN_FINST_MASK))
2855 s->flags |= SN_FINST_R;
2856
2857 req->analysers = 0;
2858 req->analyse_exp = TICK_ETERNITY;
2859 return 0;
2860}
2861
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2862/* We reached the stats page through a POST request.
2863 * Parse the posted data and enable/disable servers if necessary.
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2864 * Returns 1 if request was parsed or zero if it needs more data.
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2865 */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2866int 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]2867{
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2868 struct proxy *px;
2869 struct server *sv;
2870
2871 char *backend = NULL;
2872 int action = 0;
2873
2874 char *first_param, *cur_param, *next_param, *end_params;
2875
2876 first_param = req->data + txn->req.eoh + 2;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]2877 end_params = first_param + txn->req.body_len;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2878
2879 cur_param = next_param = end_params;
2880
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2881 if (end_params >= req->data + req->size - global.tune.maxrewrite) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2882 /* Prevent buffer overflow */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2883 si->applet.ctx.stats.st_code = STAT_STATUS_EXCD;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2884 return 1;
2885 }
2886 else if (end_params > req->data + req->l) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2887 /* we need more data */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2888 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2889 return 0;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2890 }
2891
2892 *end_params = '\0';
2893
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2894 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2895
2896 /*
2897 * Parse the parameters in reverse order to only store the last value.
2898 * From the html form, the backend and the action are at the end.
2899 */
2900 while (cur_param > first_param) {
2901 char *key, *value;
2902
2903 cur_param--;
2904 if ((*cur_param == '&') || (cur_param == first_param)) {
2905 /* Parse the key */
2906 key = cur_param;
2907 if (cur_param != first_param) {
2908 /* delimit the string for the next loop */
2909 *key++ = '\0';
2910 }
2911
2912 /* Parse the value */
2913 value = key;
2914 while (*value != '\0' && *value != '=') {
2915 value++;
2916 }
2917 if (*value == '=') {
2918 /* Ok, a value is found, we can mark the end of the key */
2919 *value++ = '\0';
2920 }
2921
Willy Tarreaubf9c2fc2011-05-31 18:06:18 +0200[diff] [blame]2922 if (!url_decode(key) || !url_decode(value))
2923 break;
2924
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2925 /* Now we can check the key to see what to do */
2926 if (!backend && strcmp(key, "b") == 0) {
2927 backend = value;
2928 }
2929 else if (!action && strcmp(key, "action") == 0) {
2930 if (strcmp(value, "disable") == 0) {
2931 action = 1;
2932 }
2933 else if (strcmp(value, "enable") == 0) {
2934 action = 2;
2935 } else {
2936 /* unknown action, no need to continue */
2937 break;
2938 }
2939 }
2940 else if (strcmp(key, "s") == 0) {
2941 if (backend && action && get_backend_server(backend, value, &px, &sv)) {
2942 switch (action) {
2943 case 1:
Cyril Bonté1e2a1702011-03-03 21:05:17 +0100[diff] [blame]2944 if ((px->state != PR_STSTOPPED) && !(sv->state & SRV_MAINTAIN)) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2945 /* Not already in maintenance, we can change the server state */
2946 sv->state |= SRV_MAINTAIN;
2947 set_server_down(sv);
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2948 si->applet.ctx.stats.st_code = STAT_STATUS_DONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2949 }
2950 break;
2951 case 2:
Cyril Bonté1e2a1702011-03-03 21:05:17 +0100[diff] [blame]2952 if ((px->state != PR_STSTOPPED) && (sv->state & SRV_MAINTAIN)) {
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2953 /* Already in maintenance, we can change the server state */
2954 set_server_up(sv);
Willy Tarreau70461302010-10-22 14:39:02 +0200[diff] [blame]2955 sv->health = sv->rise; /* up, but will fall down at first failure */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]2956 si->applet.ctx.stats.st_code = STAT_STATUS_DONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2957 }
2958 break;
2959 }
2960 }
2961 }
2962 next_param = cur_param;
2963 }
2964 }
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]2965 return 1;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2966}
2967
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2968/* returns a pointer to the first rule which forbids access (deny or http_auth),
2969 * or NULL if everything's OK.
2970 */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2971static inline struct http_req_rule *
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2972http_check_access_rule(struct proxy *px, struct list *rules, struct session *s, struct http_txn *txn)
2973{
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2974 struct http_req_rule *rule;
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2975
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2976 list_for_each_entry(rule, rules, list) {
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2977 int ret = 1;
2978
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2979 if (rule->action >= HTTP_REQ_ACT_MAX)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2980 continue;
2981
2982 /* check condition, but only if attached */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2983 if (rule->cond) {
2984 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2985 ret = acl_pass(ret);
2986
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2987 if (rule->cond->pol == ACL_COND_UNLESS)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2988 ret = !ret;
2989 }
2990
2991 if (ret) {
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2992 if (rule->action == HTTP_REQ_ACT_ALLOW)
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2993 return NULL; /* no problem */
2994 else
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]2995 return rule; /* most likely a deny or auth rule */
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]2996 }
2997 }
2998 return NULL;
2999}
3000
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3001/* This stream analyser runs all HTTP request processing which is common to
3002 * frontends and backends, which means blocking ACLs, filters, connection-close,
3003 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3004 * 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]3005 * either needs more data or wants to immediately abort the request (eg: deny,
3006 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3007 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3008int 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]3009{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3010 struct http_txn *txn = &s->txn;
3011 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3012 struct acl_cond *cond;
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3013 struct http_req_rule *http_req_last_rule = NULL;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3014 struct redirect_rule *rule;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]3015 struct cond_wordlist *wl;
Simon Horman70735c92011-06-07 11:07:50 +0900[diff] [blame]3016 int do_stats;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3017
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3018 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3019 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3020 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3021 return 0;
3022 }
3023
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3024 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]3025 req->analyse_exp = TICK_ETERNITY;
3026
3027 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3028 now_ms, __FUNCTION__,
3029 s,
3030 req,
3031 req->rex, req->wex,
3032 req->flags,
3033 req->l,
3034 req->analysers);
3035
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3036 /* first check whether we have some ACLs set to block this request */
3037 list_for_each_entry(cond, &px->block_cond, list) {
3038 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]3039
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3040 ret = acl_pass(ret);
3041 if (cond->pol == ACL_COND_UNLESS)
3042 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]3043
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3044 if (ret) {
3045 txn->status = 403;
3046 /* let's log the request time */
3047 s->logs.tv_request = now;
3048 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3049 session_inc_http_err_ctr(s);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3050 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3051 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3052 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3053
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3054 /* evaluate http-request rules */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3055 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]3056
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3057 /* evaluate stats http-request rules only if http-request is OK */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3058 if (!http_req_last_rule) {
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3059 do_stats = stats_check_uri(s->rep->prod, txn, px);
3060 if (do_stats)
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3061 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]3062 }
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3063 else
3064 do_stats = 0;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3065
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3066 /* return a 403 if either rule has blocked */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3067 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]3068 txn->status = 403;
3069 s->logs.tv_request = now;
3070 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3071 session_inc_http_err_ctr(s);
Willy Tarreau6da0f6d2011-01-06 18:19:50 +0100[diff] [blame]3072 s->fe->fe_counters.denied_req++;
3073 if (an_bit == AN_REQ_HTTP_PROCESS_BE)
3074 s->be->be_counters.denied_req++;
3075 if (s->listener->counters)
3076 s->listener->counters->denied_req++;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3077 goto return_prx_cond;
3078 }
3079
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3080 /* try headers filters */
3081 if (px->req_exp != NULL) {
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]3082 if (apply_filters_to_request(s, req, px) < 0)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3083 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3084
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3085 /* has the request been denied ? */
3086 if (txn->flags & TX_CLDENY) {
3087 /* no need to go further */
3088 txn->status = 403;
3089 /* let's log the request time */
3090 s->logs.tv_request = now;
3091 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3092 session_inc_http_err_ctr(s);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3093 goto return_prx_cond;
3094 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3095
3096 /* When a connection is tarpitted, we use the tarpit timeout,
3097 * which may be the same as the connect timeout if unspecified.
3098 * If unset, then set it to zero because we really want it to
3099 * eventually expire. We build the tarpit as an analyser.
3100 */
3101 if (txn->flags & TX_CLTARPIT) {
3102 buffer_erase(s->req);
3103 /* wipe the request out so that we can drop the connection early
3104 * if the client closes first.
3105 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3106 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3107 req->analysers = 0; /* remove switching rules etc... */
3108 req->analysers |= AN_REQ_HTTP_TARPIT;
3109 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
3110 if (!req->analyse_exp)
3111 req->analyse_exp = tick_add(now_ms, 0);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3112 session_inc_http_err_ctr(s);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3113 return 1;
3114 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3115 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3116
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3117 /* Until set to anything else, the connection mode is set as TUNNEL. It will
3118 * only change if both the request and the config reference something else.
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3119 * Option httpclose by itself does not set a mode, it remains a tunnel mode
3120 * in which headers are mangled. However, if another mode is set, it will
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3121 * affect it (eg: server-close/keep-alive + httpclose = close). Note that we
3122 * avoid to redo the same work if FE and BE have the same settings (common).
3123 * The method consists in checking if options changed between the two calls
3124 * (implying that either one is non-null, or one of them is non-null and we
3125 * are there for the first time.
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]3126 */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3127
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]3128 if ((!(txn->flags & TX_HDR_CONN_PRS) &&
3129 (s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) ||
3130 ((s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) !=
3131 (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]3132 int tmp = TX_CON_WANT_TUN;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3133
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]3134 if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE ||
3135 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3136 tmp = TX_CON_WANT_KAL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]3137 if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO)
3138 tmp = TX_CON_WANT_SCL;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3139 if ((s->fe->options|s->be->options) & PR_O_FORCE_CLO)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3140 tmp = TX_CON_WANT_CLO;
3141
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3142 if ((txn->flags & TX_CON_WANT_MSK) < tmp)
3143 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3144
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3145 if (!(txn->flags & TX_HDR_CONN_PRS)) {
3146 /* parse the Connection header and possibly clean it */
3147 int to_del = 0;
3148 if ((txn->flags & TX_REQ_VER_11) ||
Willy Tarreau8a8e1d92010-04-05 16:15:16 +0200[diff] [blame]3149 ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL &&
3150 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3151 to_del |= 2; /* remove "keep-alive" */
3152 if (!(txn->flags & TX_REQ_VER_11))
3153 to_del |= 1; /* remove "close" */
3154 http_parse_connection_header(txn, msg, req, to_del);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3155 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3156
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3157 /* check if client or config asks for explicit close in KAL/SCL */
3158 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
3159 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
3160 ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */
3161 (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]3162 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) || /* httpclose+any = forceclose */
Willy Tarreauc3e8b252010-01-28 15:01:20 +0100[diff] [blame]3163 !(txn->flags & TX_REQ_XFER_LEN) || /* no length known => close */
3164 s->fe->state == PR_STSTOPPED)) /* frontend is stopping */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3165 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
3166 }
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]3167
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3168 /* we can be blocked here because the request needs to be authenticated,
3169 * either to pass or to access stats.
3170 */
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3171 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]3172 struct chunk msg;
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]3173 char *realm = http_req_last_rule->http_auth.realm;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3174
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3175 if (!realm)
3176 realm = do_stats?STATS_DEFAULT_REALM:px->id;
3177
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]3178 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]3179 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
3180 txn->status = 401;
3181 stream_int_retnclose(req->prod, &msg);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3182 /* on 401 we still count one error, because normal browsing
3183 * won't significantly increase the counter but brute force
3184 * attempts will.
3185 */
3186 session_inc_http_err_ctr(s);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3187 goto return_prx_cond;
3188 }
3189
Willy Tarreauf68a15a2011-01-06 16:53:21 +0100[diff] [blame]3190 /* add request headers from the rule sets in the same order */
3191 list_for_each_entry(wl, &px->req_add, list) {
3192 if (wl->cond) {
3193 int ret = acl_exec_cond(wl->cond, px, s, txn, ACL_DIR_REQ);
3194 ret = acl_pass(ret);
3195 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
3196 ret = !ret;
3197 if (!ret)
3198 continue;
3199 }
3200
3201 if (unlikely(http_header_add_tail(req, &txn->req, &txn->hdr_idx, wl->s) < 0))
3202 goto return_bad_req;
3203 }
3204
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3205 if (do_stats) {
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3206 struct stats_admin_rule *stats_admin_rule;
3207
3208 /* We need to provide stats for this request.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3209 * FIXME!!! that one is rather dangerous, we want to
3210 * make it follow standard rules (eg: clear req->analysers).
3211 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3212
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3213 /* now check whether we have some admin rules for this request */
3214 list_for_each_entry(stats_admin_rule, &s->be->uri_auth->admin_rules, list) {
3215 int ret = 1;
3216
3217 if (stats_admin_rule->cond) {
3218 ret = acl_exec_cond(stats_admin_rule->cond, s->be, s, &s->txn, ACL_DIR_REQ);
3219 ret = acl_pass(ret);
3220 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
3221 ret = !ret;
3222 }
3223
3224 if (ret) {
3225 /* no rule, or the rule matches */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3226 s->rep->prod->applet.ctx.stats.flags |= STAT_ADMIN;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3227 break;
3228 }
3229 }
3230
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]3231 /* Was the status page requested with a POST ? */
3232 if (txn->meth == HTTP_METH_POST) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3233 if (s->rep->prod->applet.ctx.stats.flags & STAT_ADMIN) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]3234 if (msg->msg_state < HTTP_MSG_100_SENT) {
3235 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3236 * send an HTTP/1.1 100 Continue intermediate response.
3237 */
3238 if (txn->flags & TX_REQ_VER_11) {
3239 struct hdr_ctx ctx;
3240 ctx.idx = 0;
3241 /* Expect is allowed in 1.1, look for it */
3242 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3243 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3244 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3245 }
3246 }
3247 msg->msg_state = HTTP_MSG_100_SENT;
3248 s->logs.tv_request = now; /* update the request timer to reflect full request */
3249 }
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3250 if (!http_process_req_stat_post(s->rep->prod, txn, req)) {
Cyril Bonté23b39d92011-02-10 22:54:44 +0100[diff] [blame]3251 /* we need more data */
3252 req->analysers |= an_bit;
3253 buffer_dont_connect(req);
3254 return 0;
3255 }
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3256 } else {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]3257 s->rep->prod->applet.ctx.stats.st_code = STAT_STATUS_DENY;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3258 }
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]3259 }
3260
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3261 s->logs.tv_request = now;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3262 s->task->nice = -32; /* small boost for HTTP statistics */
Willy Tarreaub24281b2011-02-13 13:16:36 +0100[diff] [blame]3263 stream_int_register_handler(s->rep->prod, &http_stats_applet);
Willy Tarreau7b7a8e92011-03-27 19:53:06 +0200[diff] [blame]3264 copy_target(&s->target, &s->rep->prod->target); // for logging only
Willy Tarreaubc4af052011-02-13 13:25:14 +0100[diff] [blame]3265 s->rep->prod->applet.private = s;
3266 s->rep->prod->applet.st0 = s->rep->prod->applet.st1 = 0;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3267 req->analysers = 0;
3268
3269 return 0;
3270
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3271 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3272
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3273 /* check whether we have some ACLs set to redirect this request */
3274 list_for_each_entry(rule, &px->redirect_rules, list) {
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3275 int ret = ACL_PAT_PASS;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3276
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3277 if (rule->cond) {
3278 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
3279 ret = acl_pass(ret);
3280 if (rule->cond->pol == ACL_COND_UNLESS)
3281 ret = !ret;
3282 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3283
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3284 if (ret) {
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3285 struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 };
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3286 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3287
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3288 /* build redirect message */
3289 switch(rule->code) {
3290 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3291 msg_fmt = HTTP_303;
3292 break;
3293 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3294 msg_fmt = HTTP_301;
3295 break;
3296 case 302:
3297 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3298 msg_fmt = HTTP_302;
3299 break;
3300 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3301
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3302 if (unlikely(!chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3303 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3304
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3305 switch(rule->type) {
3306 case REDIRECT_TYPE_PREFIX: {
3307 const char *path;
3308 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3309
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3310 path = http_get_path(txn);
3311 /* build message using path */
3312 if (path) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3313 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]3314 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
3315 int qs = 0;
3316 while (qs < pathlen) {
3317 if (path[qs] == '?') {
3318 pathlen = qs;
3319 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3320 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3321 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3322 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3323 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3324 } else {
3325 path = "/";
3326 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3327 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3328
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3329 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3330 goto return_bad_req;
3331
3332 /* add prefix. Note that if prefix == "/", we don't want to
3333 * add anything, otherwise it makes it hard for the user to
3334 * configure a self-redirection.
3335 */
3336 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3337 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3338 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3339 }
3340
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3341 /* add path */
3342 memcpy(rdr.str + rdr.len, path, pathlen);
3343 rdr.len += pathlen;
Willy Tarreau81e3b4f2010-01-10 00:42:19 +0100[diff] [blame]3344
3345 /* append a slash at the end of the location is needed and missing */
3346 if (rdr.len && rdr.str[rdr.len - 1] != '/' &&
3347 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
3348 if (rdr.len > rdr.size - 5)
3349 goto return_bad_req;
3350 rdr.str[rdr.len] = '/';
3351 rdr.len++;
3352 }
3353
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3354 break;
3355 }
3356 case REDIRECT_TYPE_LOCATION:
3357 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3358 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3359 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3360
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3361 /* add location */
3362 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3363 rdr.len += rule->rdr_len;
3364 break;
3365 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3366
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3367 if (rule->cookie_len) {
3368 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
3369 rdr.len += 14;
3370 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
3371 rdr.len += rule->cookie_len;
3372 memcpy(rdr.str + rdr.len, "\r\n", 2);
3373 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3374 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3375
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3376 /* add end of headers and the keep-alive/close status.
3377 * We may choose to set keep-alive if the Location begins
3378 * with a slash, because the client will come back to the
3379 * same server.
3380 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3381 txn->status = rule->code;
3382 /* let's log the request time */
3383 s->logs.tv_request = now;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3384
3385 if (rule->rdr_len >= 1 && *rule->rdr_str == '/' &&
3386 (txn->flags & TX_REQ_XFER_LEN) &&
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3387 !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.body_len &&
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3388 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
3389 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
3390 /* keep-alive possible */
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3391 if (!(txn->flags & TX_REQ_VER_11)) {
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3392 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3393 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: keep-alive", 30);
3394 rdr.len += 30;
3395 } else {
3396 memcpy(rdr.str + rdr.len, "\r\nConnection: keep-alive", 24);
3397 rdr.len += 24;
3398 }
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3399 }
3400 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
3401 rdr.len += 4;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3402 buffer_write(req->prod->ob, rdr.str, rdr.len);
3403 /* "eat" the request */
3404 buffer_ignore(req, msg->sov - msg->som);
3405 msg->som = msg->sov;
3406 req->analysers = AN_REQ_HTTP_XFER_BODY;
Willy Tarreau9300fb22010-01-05 00:58:24 +0100[diff] [blame]3407 s->rep->analysers = AN_RES_HTTP_XFER_BODY;
3408 txn->req.msg_state = HTTP_MSG_CLOSED;
3409 txn->rsp.msg_state = HTTP_MSG_DONE;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3410 break;
3411 } else {
3412 /* keep-alive not possible */
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3413 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3414 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
3415 rdr.len += 29;
3416 } else {
3417 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
3418 rdr.len += 23;
3419 }
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]3420 stream_int_retnclose(req->prod, &rdr);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3421 goto return_prx_cond;
3422 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3423 }
3424 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3425
Willy Tarreau2be39392010-01-03 17:24:51 +0100[diff] [blame]3426 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
3427 * If this happens, then the data will not come immediately, so we must
3428 * send all what we have without waiting. Note that due to the small gain
3429 * in waiting for the body of the request, it's easier to simply put the
3430 * BF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
3431 * itself once used.
3432 */
3433 req->flags |= BF_SEND_DONTWAIT;
3434
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3435 /* that's OK for us now, let's move on to next analysers */
3436 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]3437
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3438 return_bad_req:
3439 /* We centralize bad requests processing here */
3440 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
3441 /* we detected a parsing error. We want to archive this request
3442 * in the dedicated proxy area for later troubleshooting.
3443 */
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]3444 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]3445 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3446
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3447 txn->req.msg_state = HTTP_MSG_ERROR;
3448 txn->status = 400;
3449 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3450
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3451 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3452 if (s->listener->counters)
3453 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]3454
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3455 return_prx_cond:
3456 if (!(s->flags & SN_ERR_MASK))
3457 s->flags |= SN_ERR_PRXCOND;
3458 if (!(s->flags & SN_FINST_MASK))
3459 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]3460
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3461 req->analysers = 0;
3462 req->analyse_exp = TICK_ETERNITY;
3463 return 0;
3464}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3465
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3466/* This function performs all the processing enabled for the current request.
3467 * It returns 1 if the processing can continue on next analysers, or zero if it
3468 * needs more data, encounters an error, or wants to immediately abort the
3469 * request. It relies on buffers flags, and updates s->req->analysers.
3470 */
3471int http_process_request(struct session *s, struct buffer *req, int an_bit)
3472{
3473 struct http_txn *txn = &s->txn;
3474 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3475
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3476 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3477 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3478 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3479 return 0;
3480 }
3481
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3482 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3483 now_ms, __FUNCTION__,
3484 s,
3485 req,
3486 req->rex, req->wex,
3487 req->flags,
3488 req->l,
3489 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3490
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3491 /*
3492 * Right now, we know that we have processed the entire headers
3493 * and that unwanted requests have been filtered out. We can do
3494 * whatever we want with the remaining request. Also, now we
3495 * may have separate values for ->fe, ->be.
3496 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3497
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3498 /*
3499 * If HTTP PROXY is set we simply get remote server address
3500 * parsing incoming request.
3501 */
3502 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3503 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]3504 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3505
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3506 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3507 * 7: Now we can work with the cookies.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3508 * Note that doing so might move headers in the request, but
3509 * the fields will stay coherent and the URI will not move.
3510 * This should only be performed in the backend.
3511 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]3512 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3513 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
3514 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]3515
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3516 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3517 * 8: the appsession cookie was looked up very early in 1.2,
3518 * so let's do the same now.
3519 */
3520
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]3521 /* It needs to look into the URI unless persistence must be ignored */
3522 if ((txn->sessid == NULL) && s->be->appsession_name && !(s->flags & SN_IGNORE_PRST)) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3523 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]3524 }
3525
3526 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3527 * 9: add X-Forwarded-For if either the frontend or the backend
3528 * asks for it.
3529 */
3530 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
Willy Tarreau87cf5142011-08-19 22:57:24 +0200[diff] [blame]3531 struct hdr_ctx ctx = { .idx = 0 };
3532
3533 if (!((s->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
3534 http_find_header2("X-Forwarded-For", 15, txn->req.sol, &txn->hdr_idx, &ctx)) {
3535 /* The header is set to be added only if none is present
3536 * and we found it, so don't do anything.
3537 */
3538 }
3539 else if (s->req->prod->addr.c.from.ss_family == AF_INET) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3540 /* Add an X-Forwarded-For header unless the source IP is
3541 * in the 'except' network range.
3542 */
3543 if ((!s->fe->except_mask.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3544 (((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]3545 != s->fe->except_net.s_addr) &&
3546 (!s->be->except_mask.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3547 (((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]3548 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3549 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3550 unsigned char *pn;
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3551 pn = (unsigned char *)&((struct sockaddr_in *)&s->req->prod->addr.c.from)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3552
3553 /* Note: we rely on the backend to get the header name to be used for
3554 * x-forwarded-for, because the header is really meant for the backends.
3555 * However, if the backend did not specify any option, we have to rely
3556 * on the frontend's header name.
3557 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3558 if (s->be->fwdfor_hdr_len) {
3559 len = s->be->fwdfor_hdr_len;
3560 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3561 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3562 len = s->fe->fwdfor_hdr_len;
3563 memcpy(trash, s->fe->fwdfor_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3564 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3565 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]3566
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]3567 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3568 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3569 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3570 }
3571 }
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3572 else if (s->req->prod->addr.c.from.ss_family == AF_INET6) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3573 /* FIXME: for the sake of completeness, we should also support
3574 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3575 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3576 int len;
3577 char pn[INET6_ADDRSTRLEN];
3578 inet_ntop(AF_INET6,
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3579 (const void *)&((struct sockaddr_in6 *)(&s->req->prod->addr.c.from))->sin6_addr,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3580 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3581
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3582 /* Note: we rely on the backend to get the header name to be used for
3583 * x-forwarded-for, because the header is really meant for the backends.
3584 * However, if the backend did not specify any option, we have to rely
3585 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3586 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3587 if (s->be->fwdfor_hdr_len) {
3588 len = s->be->fwdfor_hdr_len;
3589 memcpy(trash, s->be->fwdfor_hdr_name, len);
3590 } else {
3591 len = s->fe->fwdfor_hdr_len;
3592 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3593 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3594 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3595
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3596 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3597 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3598 goto return_bad_req;
3599 }
3600 }
3601
3602 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3603 * 10: add X-Original-To if either the frontend or the backend
3604 * asks for it.
3605 */
3606 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
3607
3608 /* FIXME: don't know if IPv6 can handle that case too. */
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3609 if (s->req->prod->addr.c.from.ss_family == AF_INET) {
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3610 /* Add an X-Original-To header unless the destination IP is
3611 * in the 'except' network range.
3612 */
3613 if (!(s->flags & SN_FRT_ADDR_SET))
3614 get_frt_addr(s);
3615
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3616 if (s->req->prod->addr.c.to.ss_family == AF_INET &&
Emeric Brun5bd86a82010-10-22 17:23:04 +0200[diff] [blame]3617 ((!s->fe->except_mask_to.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3618 (((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]3619 != s->fe->except_to.s_addr) &&
3620 (!s->be->except_mask_to.s_addr ||
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3621 (((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]3622 != s->be->except_to.s_addr))) {
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3623 int len;
3624 unsigned char *pn;
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]3625 pn = (unsigned char *)&((struct sockaddr_in *)&s->req->prod->addr.c.to)->sin_addr;
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3626
3627 /* Note: we rely on the backend to get the header name to be used for
3628 * x-original-to, because the header is really meant for the backends.
3629 * However, if the backend did not specify any option, we have to rely
3630 * on the frontend's header name.
3631 */
3632 if (s->be->orgto_hdr_len) {
3633 len = s->be->orgto_hdr_len;
3634 memcpy(trash, s->be->orgto_hdr_name, len);
3635 } else {
3636 len = s->fe->orgto_hdr_len;
3637 memcpy(trash, s->fe->orgto_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3638 }
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3639 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
3640
3641 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3642 &txn->hdr_idx, trash, len) < 0))
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3643 goto return_bad_req;
3644 }
3645 }
3646 }
3647
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3648 /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set. */
3649 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
Cyril Bonté9ea2b9a2010-12-29 09:36:56 +0100[diff] [blame]3650 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3651 unsigned int want_flags = 0;
3652
3653 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3654 if (((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL ||
3655 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) &&
3656 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3657 want_flags |= TX_CON_CLO_SET;
3658 } else {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3659 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL &&
3660 !((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) ||
3661 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3662 want_flags |= TX_CON_KAL_SET;
3663 }
3664
3665 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
3666 http_change_connection_header(txn, msg, req, want_flags);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3667 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3668
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3669
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3670 /* If we have no server assigned yet and we're balancing on url_param
3671 * with a POST request, we may be interested in checking the body for
3672 * that parameter. This will be done in another analyser.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3673 */
3674 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
3675 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3676 s->be->url_param_post_limit != 0 &&
Willy Tarreau61a21a32011-03-01 20:35:49 +0100[diff] [blame]3677 (txn->flags & (TX_REQ_CNT_LEN|TX_REQ_TE_CHNK))) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3678 buffer_dont_connect(req);
3679 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3680 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3681
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3682 if (txn->flags & TX_REQ_XFER_LEN)
3683 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]3684
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3685 /*************************************************************
3686 * OK, that's finished for the headers. We have done what we *
3687 * could. Let's switch to the DATA state. *
3688 ************************************************************/
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3689 req->analyse_exp = TICK_ETERNITY;
3690 req->analysers &= ~an_bit;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3691
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3692 s->logs.tv_request = now;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3693 /* OK let's go on with the BODY now */
3694 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3695
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3696 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3697 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3698 /* we detected a parsing error. We want to archive this request
3699 * in the dedicated proxy area for later troubleshooting.
3700 */
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]3701 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]3702 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3703
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3704 txn->req.msg_state = HTTP_MSG_ERROR;
3705 txn->status = 400;
3706 req->analysers = 0;
3707 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3708
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3709 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3710 if (s->listener->counters)
3711 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3712
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3713 if (!(s->flags & SN_ERR_MASK))
3714 s->flags |= SN_ERR_PRXCOND;
3715 if (!(s->flags & SN_FINST_MASK))
3716 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3717 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3718}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3719
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3720/* This function is an analyser which processes the HTTP tarpit. It always
3721 * returns zero, at the beginning because it prevents any other processing
3722 * from occurring, and at the end because it terminates the request.
3723 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3724int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3725{
3726 struct http_txn *txn = &s->txn;
3727
3728 /* This connection is being tarpitted. The CLIENT side has
3729 * already set the connect expiration date to the right
3730 * timeout. We just have to check that the client is still
3731 * there and that the timeout has not expired.
3732 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3733 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3734 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
3735 !tick_is_expired(req->analyse_exp, now_ms))
3736 return 0;
3737
3738 /* We will set the queue timer to the time spent, just for
3739 * logging purposes. We fake a 500 server error, so that the
3740 * attacker will not suspect his connection has been tarpitted.
3741 * It will not cause trouble to the logs because we can exclude
3742 * the tarpitted connections by filtering on the 'PT' status flags.
3743 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3744 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
3745
3746 txn->status = 500;
3747 if (req->flags != BF_READ_ERROR)
3748 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
3749
3750 req->analysers = 0;
3751 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3752
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3753 s->fe->fe_counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3754 if (s->listener->counters)
3755 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3756
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3757 if (!(s->flags & SN_ERR_MASK))
3758 s->flags |= SN_ERR_PRXCOND;
3759 if (!(s->flags & SN_FINST_MASK))
3760 s->flags |= SN_FINST_T;
3761 return 0;
3762}
3763
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3764/* This function is an analyser which processes the HTTP request body. It looks
3765 * for parameters to be used for the load balancing algorithm (url_param). It
3766 * must only be called after the standard HTTP request processing has occurred,
3767 * because it expects the request to be parsed. It returns zero if it needs to
3768 * read more data, or 1 once it has completed its analysis.
3769 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3770int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3771{
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3772 struct http_txn *txn = &s->txn;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3773 struct http_msg *msg = &s->txn.req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3774 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3775
3776 /* We have to parse the HTTP request body to find any required data.
3777 * "balance url_param check_post" should have been the only way to get
3778 * into this. We were brought here after HTTP header analysis, so all
3779 * related structures are ready.
3780 */
3781
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3782 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3783 goto missing_data;
3784
3785 if (msg->msg_state < HTTP_MSG_100_SENT) {
3786 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3787 * send an HTTP/1.1 100 Continue intermediate response.
3788 */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]3789 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3790 struct hdr_ctx ctx;
3791 ctx.idx = 0;
3792 /* Expect is allowed in 1.1, look for it */
3793 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3794 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3795 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3796 }
3797 }
3798 msg->msg_state = HTTP_MSG_100_SENT;
3799 }
3800
3801 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3802 /* we have msg->col and msg->sov which both point to the first
3803 * byte of message body. msg->som still points to the beginning
3804 * of the message. We must save the body in req->lr because it
3805 * survives buffer re-alignments.
3806 */
3807 req->lr = req->data + msg->sov;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3808 if (txn->flags & TX_REQ_TE_CHNK)
3809 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3810 else
3811 msg->msg_state = HTTP_MSG_DATA;
3812 }
3813
3814 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3815 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3816 * set ->sov and ->lr to point to the body and switch to DATA or
3817 * TRAILERS state.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3818 */
3819 int ret = http_parse_chunk_size(req, msg);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3820
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3821 if (!ret)
3822 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3823 else if (ret < 0) {
3824 session_inc_http_err_ctr(s);
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3825 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3826 }
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3827 }
3828
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3829 /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3830 * We have the first non-header byte in msg->col, which is either the
3831 * beginning of the chunk size or of the data. The first data byte is in
3832 * msg->sov, which is equal to msg->col when not using transfer-encoding.
3833 * We're waiting for at least <url_param_post_limit> bytes after msg->sov.
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3834 */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3835
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]3836 if (msg->body_len < limit)
3837 limit = msg->body_len;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3838
Willy Tarreau7c96f672009-12-27 22:47:25 +0100[diff] [blame]3839 if (req->l - (msg->sov - msg->som) >= limit) /* we have enough bytes now */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3840 goto http_end;
3841
3842 missing_data:
3843 /* we get here if we need to wait for more data */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3844 if (req->flags & BF_FULL) {
3845 session_inc_http_err_ctr(s);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3846 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3847 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3848
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3849 if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
3850 txn->status = 408;
3851 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3852
3853 if (!(s->flags & SN_ERR_MASK))
3854 s->flags |= SN_ERR_CLITO;
3855 if (!(s->flags & SN_FINST_MASK))
3856 s->flags |= SN_FINST_D;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3857 goto return_err_msg;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3858 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3859
3860 /* we get here if we need to wait for more data */
3861 if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3862 /* Not enough data. We'll re-use the http-request
3863 * timeout here. Ideally, we should set the timeout
3864 * relative to the accept() date. We just set the
3865 * request timeout once at the beginning of the
3866 * request.
3867 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3868 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3869 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]3870 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3871 return 0;
3872 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3873
3874 http_end:
3875 /* The situation will not evolve, so let's give up on the analysis. */
3876 s->logs.tv_request = now; /* update the request timer to reflect full request */
3877 req->analysers &= ~an_bit;
3878 req->analyse_exp = TICK_ETERNITY;
3879 return 1;
3880
3881 return_bad_req: /* let's centralize all bad requests */
3882 txn->req.msg_state = HTTP_MSG_ERROR;
3883 txn->status = 400;
3884 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
3885
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3886 if (!(s->flags & SN_ERR_MASK))
3887 s->flags |= SN_ERR_PRXCOND;
3888 if (!(s->flags & SN_FINST_MASK))
3889 s->flags |= SN_FINST_R;
3890
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3891 return_err_msg:
3892 req->analysers = 0;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3893 s->fe->fe_counters.failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3894 if (s->listener->counters)
3895 s->listener->counters->failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3896 return 0;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3897}
3898
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3899/* Terminate current transaction and prepare a new one. This is very tricky
3900 * right now but it works.
3901 */
3902void http_end_txn_clean_session(struct session *s)
3903{
3904 /* FIXME: We need a more portable way of releasing a backend's and a
3905 * server's connections. We need a safer way to reinitialize buffer
3906 * flags. We also need a more accurate method for computing per-request
3907 * data.
3908 */
3909 http_silent_debug(__LINE__, s);
3910
3911 s->req->cons->flags |= SI_FL_NOLINGER;
3912 s->req->cons->shutr(s->req->cons);
3913 s->req->cons->shutw(s->req->cons);
3914
3915 http_silent_debug(__LINE__, s);
3916
3917 if (s->flags & SN_BE_ASSIGNED)
3918 s->be->beconn--;
3919
3920 s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
3921 session_process_counters(s);
Willy Tarreauf059a0f2010-08-03 16:29:52 +0200[diff] [blame]3922 session_stop_backend_counters(s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3923
3924 if (s->txn.status) {
3925 int n;
3926
3927 n = s->txn.status / 100;
3928 if (n < 1 || n > 5)
3929 n = 0;
3930
3931 if (s->fe->mode == PR_MODE_HTTP)
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3932 s->fe->fe_counters.p.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3933
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3934 if ((s->flags & SN_BE_ASSIGNED) &&
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3935 (s->be->mode == PR_MODE_HTTP))
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]3936 s->be->be_counters.p.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3937 }
3938
3939 /* don't count other requests' data */
3940 s->logs.bytes_in -= s->req->l - s->req->send_max;
3941 s->logs.bytes_out -= s->rep->l - s->rep->send_max;
3942
3943 /* let's do a final log if we need it */
3944 if (s->logs.logwait &&
3945 !(s->flags & SN_MONITOR) &&
3946 (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
3947 s->do_log(s);
3948 }
3949
3950 s->logs.accept_date = date; /* user-visible date for logging */
3951 s->logs.tv_accept = now; /* corrected date for internal use */
3952 tv_zero(&s->logs.tv_request);
3953 s->logs.t_queue = -1;
3954 s->logs.t_connect = -1;
3955 s->logs.t_data = -1;
3956 s->logs.t_close = 0;
3957 s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
3958 s->logs.srv_queue_size = 0; /* we will get this number soon */
3959
3960 s->logs.bytes_in = s->req->total = s->req->l - s->req->send_max;
3961 s->logs.bytes_out = s->rep->total = s->rep->l - s->rep->send_max;
3962
3963 if (s->pend_pos)
3964 pendconn_free(s->pend_pos);
3965
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3966 if (target_srv(&s->target)) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3967 if (s->flags & SN_CURR_SESS) {
3968 s->flags &= ~SN_CURR_SESS;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3969 target_srv(&s->target)->cur_sess--;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3970 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]3971 if (may_dequeue_tasks(target_srv(&s->target), s->be))
3972 process_srv_queue(target_srv(&s->target));
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3973 }
3974
3975 if (unlikely(s->srv_conn))
3976 sess_change_server(s, NULL);
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]3977 clear_target(&s->target);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3978
3979 s->req->cons->state = s->req->cons->prev_state = SI_ST_INI;
3980 s->req->cons->fd = -1; /* just to help with debugging */
3981 s->req->cons->err_type = SI_ET_NONE;
Willy Tarreau0b3a4112011-03-27 19:16:56 +0200[diff] [blame]3982 s->req->cons->conn_retries = 0; /* used for logging too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3983 s->req->cons->err_loc = NULL;
3984 s->req->cons->exp = TICK_ETERNITY;
3985 s->req->cons->flags = SI_FL_NONE;
Willy Tarreau96e31212011-05-30 18:10:30 +0200[diff] [blame]3986 s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST|BF_NEVER_WAIT);
3987 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]3988 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]3989 s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE);
3990 s->txn.meth = 0;
3991 http_reset_txn(s);
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]3992 s->txn.flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ;
Willy Tarreauee55dc02010-06-01 10:56:34 +0200[diff] [blame]3993 if (s->fe->options2 & PR_O2_INDEPSTR)
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3994 s->req->cons->flags |= SI_FL_INDEP_STR;
3995
Willy Tarreau96e31212011-05-30 18:10:30 +0200[diff] [blame]3996 if (s->fe->options2 & PR_O2_NODELAY) {
3997 s->req->flags |= BF_NEVER_WAIT;
3998 s->rep->flags |= BF_NEVER_WAIT;
3999 }
4000
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4001 /* if the request buffer is not empty, it means we're
4002 * about to process another request, so send pending
4003 * data with MSG_MORE to merge TCP packets when possible.
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]4004 * Just don't do this if the buffer is close to be full,
4005 * because the request will wait for it to flush a little
4006 * bit before proceeding.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4007 */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]4008 if (s->req->l > s->req->send_max) {
4009 if (s->rep->send_max &&
4010 !(s->rep->flags & BF_FULL) &&
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]4011 s->rep->r <= s->rep->data + s->rep->size - global.tune.maxrewrite)
4012 s->rep->flags |= BF_EXPECT_MORE;
4013 }
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4014
4015 /* we're removing the analysers, we MUST re-enable events detection */
4016 buffer_auto_read(s->req);
4017 buffer_auto_close(s->req);
4018 buffer_auto_read(s->rep);
4019 buffer_auto_close(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4020
4021 /* make ->lr point to the first non-forwarded byte */
4022 s->req->lr = s->req->w + s->req->send_max;
4023 if (s->req->lr >= s->req->data + s->req->size)
4024 s->req->lr -= s->req->size;
4025 s->rep->lr = s->rep->w + s->rep->send_max;
4026 if (s->rep->lr >= s->rep->data + s->rep->size)
4027 s->rep->lr -= s->req->size;
4028
Willy Tarreau342b11c2010-11-24 16:22:09 +0100[diff] [blame]4029 s->req->analysers = s->listener->analysers;
4030 s->req->analysers &= ~AN_REQ_DECODE_PROXY;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4031 s->rep->analysers = 0;
4032
4033 http_silent_debug(__LINE__, s);
4034}
4035
4036
4037/* This function updates the request state machine according to the response
4038 * state machine and buffer flags. It returns 1 if it changes anything (flag
4039 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
4040 * it is only used to find when a request/response couple is complete. Both
4041 * this function and its equivalent should loop until both return zero. It
4042 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
4043 */
4044int http_sync_req_state(struct session *s)
4045{
4046 struct buffer *buf = s->req;
4047 struct http_txn *txn = &s->txn;
4048 unsigned int old_flags = buf->flags;
4049 unsigned int old_state = txn->req.msg_state;
4050
4051 http_silent_debug(__LINE__, s);
4052 if (unlikely(txn->req.msg_state < HTTP_MSG_BODY))
4053 return 0;
4054
4055 if (txn->req.msg_state == HTTP_MSG_DONE) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4056 /* No need to read anymore, the request was completely parsed.
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4057 * We can shut the read side unless we want to abort_on_close,
4058 * or we have a POST request. The issue with POST requests is
4059 * that some browsers still send a CRLF after the request, and
4060 * this CRLF must be read so that it does not remain in the kernel
4061 * buffers, otherwise a close could cause an RST on some systems
4062 * (eg: Linux).
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4063 */
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4064 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4065 buffer_dont_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4066
4067 if (txn->rsp.msg_state == HTTP_MSG_ERROR)
4068 goto wait_other_side;
4069
4070 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
4071 /* The server has not finished to respond, so we
4072 * don't want to move in order not to upset it.
4073 */
4074 goto wait_other_side;
4075 }
4076
4077 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
4078 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4079 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4080 txn->req.msg_state = HTTP_MSG_TUNNEL;
4081 goto wait_other_side;
4082 }
4083
4084 /* When we get here, it means that both the request and the
4085 * response have finished receiving. Depending on the connection
4086 * mode, we'll have to wait for the last bytes to leave in either
4087 * direction, and sometimes for a close to be effective.
4088 */
4089
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4090 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4091 /* Server-close mode : queue a connection close to the server */
4092 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW)))
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4093 buffer_shutw_now(buf);
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4094 }
4095 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4096 /* Option forceclose is set, or either side wants to close,
4097 * let's enforce it now that we're not expecting any new
4098 * data to come. The caller knows the session is complete
4099 * once both states are CLOSED.
4100 */
4101 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4102 buffer_shutr_now(buf);
4103 buffer_shutw_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4104 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4105 }
4106 else {
4107 /* The last possible modes are keep-alive and tunnel. Since tunnel
4108 * mode does not set the body analyser, we can't reach this place
4109 * in tunnel mode, so we're left with keep-alive only.
4110 * This mode is currently not implemented, we switch to tunnel mode.
4111 */
4112 buffer_auto_read(buf);
4113 txn->req.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4114 }
4115
4116 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4117 /* if we've just closed an output, let's switch */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4118 buf->cons->flags |= SI_FL_NOLINGER; /* we want to close ASAP */
4119
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4120 if (!(buf->flags & BF_OUT_EMPTY)) {
4121 txn->req.msg_state = HTTP_MSG_CLOSING;
4122 goto http_msg_closing;
4123 }
4124 else {
4125 txn->req.msg_state = HTTP_MSG_CLOSED;
4126 goto http_msg_closed;
4127 }
4128 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4129 goto wait_other_side;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4130 }
4131
4132 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4133 http_msg_closing:
4134 /* nothing else to forward, just waiting for the output buffer
4135 * to be empty and for the shutw_now to take effect.
4136 */
4137 if (buf->flags & BF_OUT_EMPTY) {
4138 txn->req.msg_state = HTTP_MSG_CLOSED;
4139 goto http_msg_closed;
4140 }
4141 else if (buf->flags & BF_SHUTW) {
4142 txn->req.msg_state = HTTP_MSG_ERROR;
4143 goto wait_other_side;
4144 }
4145 }
4146
4147 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4148 http_msg_closed:
4149 goto wait_other_side;
4150 }
4151
4152 wait_other_side:
4153 http_silent_debug(__LINE__, s);
4154 return txn->req.msg_state != old_state || buf->flags != old_flags;
4155}
4156
4157
4158/* This function updates the response state machine according to the request
4159 * state machine and buffer flags. It returns 1 if it changes anything (flag
4160 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
4161 * it is only used to find when a request/response couple is complete. Both
4162 * this function and its equivalent should loop until both return zero. It
4163 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
4164 */
4165int http_sync_res_state(struct session *s)
4166{
4167 struct buffer *buf = s->rep;
4168 struct http_txn *txn = &s->txn;
4169 unsigned int old_flags = buf->flags;
4170 unsigned int old_state = txn->rsp.msg_state;
4171
4172 http_silent_debug(__LINE__, s);
4173 if (unlikely(txn->rsp.msg_state < HTTP_MSG_BODY))
4174 return 0;
4175
4176 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4177 /* In theory, we don't need to read anymore, but we must
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4178 * still monitor the server connection for a possible close
4179 * while the request is being uploaded, so we don't disable
4180 * reading.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4181 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4182 /* buffer_dont_read(buf); */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4183
4184 if (txn->req.msg_state == HTTP_MSG_ERROR)
4185 goto wait_other_side;
4186
4187 if (txn->req.msg_state < HTTP_MSG_DONE) {
4188 /* The client seems to still be sending data, probably
4189 * because we got an error response during an upload.
4190 * We have the choice of either breaking the connection
4191 * or letting it pass through. Let's do the later.
4192 */
4193 goto wait_other_side;
4194 }
4195
4196 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
4197 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4198 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4199 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4200 goto wait_other_side;
4201 }
4202
4203 /* When we get here, it means that both the request and the
4204 * response have finished receiving. Depending on the connection
4205 * mode, we'll have to wait for the last bytes to leave in either
4206 * direction, and sometimes for a close to be effective.
4207 */
4208
4209 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4210 /* Server-close mode : shut read and wait for the request
4211 * side to close its output buffer. The caller will detect
4212 * when we're in DONE and the other is in CLOSED and will
4213 * catch that for the final cleanup.
4214 */
4215 if (!(buf->flags & (BF_SHUTR|BF_SHUTR_NOW)))
4216 buffer_shutr_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4217 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4218 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4219 /* Option forceclose is set, or either side wants to close,
4220 * let's enforce it now that we're not expecting any new
4221 * data to come. The caller knows the session is complete
4222 * once both states are CLOSED.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4223 */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4224 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
4225 buffer_shutr_now(buf);
4226 buffer_shutw_now(buf);
4227 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4228 }
4229 else {
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4230 /* The last possible modes are keep-alive and tunnel. Since tunnel
4231 * mode does not set the body analyser, we can't reach this place
4232 * in tunnel mode, so we're left with keep-alive only.
4233 * This mode is currently not implemented, we switch to tunnel mode.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4234 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4235 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4236 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4237 }
4238
4239 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4240 /* if we've just closed an output, let's switch */
4241 if (!(buf->flags & BF_OUT_EMPTY)) {
4242 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4243 goto http_msg_closing;
4244 }
4245 else {
4246 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4247 goto http_msg_closed;
4248 }
4249 }
4250 goto wait_other_side;
4251 }
4252
4253 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4254 http_msg_closing:
4255 /* nothing else to forward, just waiting for the output buffer
4256 * to be empty and for the shutw_now to take effect.
4257 */
4258 if (buf->flags & BF_OUT_EMPTY) {
4259 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4260 goto http_msg_closed;
4261 }
4262 else if (buf->flags & BF_SHUTW) {
4263 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4264 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4265 if (target_srv(&s->target))
4266 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4267 goto wait_other_side;
4268 }
4269 }
4270
4271 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4272 http_msg_closed:
4273 /* drop any pending data */
4274 buffer_ignore(buf, buf->l - buf->send_max);
4275 buffer_auto_close(buf);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4276 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4277 goto wait_other_side;
4278 }
4279
4280 wait_other_side:
4281 http_silent_debug(__LINE__, s);
4282 return txn->rsp.msg_state != old_state || buf->flags != old_flags;
4283}
4284
4285
4286/* Resync the request and response state machines. Return 1 if either state
4287 * changes.
4288 */
4289int http_resync_states(struct session *s)
4290{
4291 struct http_txn *txn = &s->txn;
4292 int old_req_state = txn->req.msg_state;
4293 int old_res_state = txn->rsp.msg_state;
4294
4295 http_silent_debug(__LINE__, s);
4296 http_sync_req_state(s);
4297 while (1) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4298 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4299 if (!http_sync_res_state(s))
4300 break;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4301 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4302 if (!http_sync_req_state(s))
4303 break;
4304 }
4305 http_silent_debug(__LINE__, s);
4306 /* OK, both state machines agree on a compatible state.
4307 * There are a few cases we're interested in :
4308 * - HTTP_MSG_TUNNEL on either means we have to disable both analysers
4309 * - HTTP_MSG_CLOSED on both sides means we've reached the end in both
4310 * directions, so let's simply disable both analysers.
4311 * - HTTP_MSG_CLOSED on the response only means we must abort the
4312 * request.
4313 * - HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE on the response
4314 * with server-close mode means we've completed one request and we
4315 * must re-initialize the server connection.
4316 */
4317
4318 if (txn->req.msg_state == HTTP_MSG_TUNNEL ||
4319 txn->rsp.msg_state == HTTP_MSG_TUNNEL ||
4320 (txn->req.msg_state == HTTP_MSG_CLOSED &&
4321 txn->rsp.msg_state == HTTP_MSG_CLOSED)) {
4322 s->req->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4323 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4324 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4325 s->rep->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4326 buffer_auto_close(s->rep);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4327 buffer_auto_read(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4328 }
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4329 else if (txn->rsp.msg_state == HTTP_MSG_CLOSED ||
4330 txn->rsp.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4331 txn->req.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4332 (s->rep->flags & BF_SHUTW)) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4333 s->rep->analysers = 0;
4334 buffer_auto_close(s->rep);
4335 buffer_auto_read(s->rep);
4336 s->req->analysers = 0;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4337 buffer_abort(s->req);
4338 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4339 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4340 buffer_ignore(s->req, s->req->l - s->req->send_max);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4341 }
4342 else if (txn->req.msg_state == HTTP_MSG_CLOSED &&
4343 txn->rsp.msg_state == HTTP_MSG_DONE &&
4344 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)) {
4345 /* server-close: terminate this server connection and
4346 * reinitialize a fresh-new transaction.
4347 */
4348 http_end_txn_clean_session(s);
4349 }
4350
4351 http_silent_debug(__LINE__, s);
4352 return txn->req.msg_state != old_req_state ||
4353 txn->rsp.msg_state != old_res_state;
4354}
4355
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4356/* This function is an analyser which forwards request body (including chunk
4357 * sizes if any). It is called as soon as we must forward, even if we forward
4358 * zero byte. The only situation where it must not be called is when we're in
4359 * tunnel mode and we want to forward till the close. It's used both to forward
4360 * remaining data and to resync after end of body. It expects the msg_state to
4361 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4362 * 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]4363 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4364 * bytes of pending data + the headers if not already done (between som and sov).
4365 * It eventually adjusts som to match sov after the data in between have been sent.
4366 */
4367int http_request_forward_body(struct session *s, struct buffer *req, int an_bit)
4368{
4369 struct http_txn *txn = &s->txn;
4370 struct http_msg *msg = &s->txn.req;
4371
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4372 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4373 return 0;
4374
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4375 if ((req->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
4376 ((req->flags & BF_SHUTW) && (req->to_forward || req->send_max))) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4377 /* Output closed while we were sending data. We must abort and
4378 * wake the other side up.
4379 */
4380 msg->msg_state = HTTP_MSG_ERROR;
4381 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4382 return 1;
4383 }
4384
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4385 /* in most states, we should abort in case of early close */
4386 buffer_auto_close(req);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4387
4388 /* Note that we don't have to send 100-continue back because we don't
4389 * need the data to complete our job, and it's up to the server to
4390 * decide whether to return 100, 417 or anything else in return of
4391 * an "Expect: 100-continue" header.
4392 */
4393
4394 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
4395 /* we have msg->col and msg->sov which both point to the first
4396 * byte of message body. msg->som still points to the beginning
4397 * of the message. We must save the body in req->lr because it
4398 * survives buffer re-alignments.
4399 */
4400 req->lr = req->data + msg->sov;
4401 if (txn->flags & TX_REQ_TE_CHNK)
4402 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4403 else {
4404 msg->msg_state = HTTP_MSG_DATA;
4405 }
4406 }
4407
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4408 while (1) {
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4409 int bytes;
4410
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4411 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4412 /* we may have some data pending */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4413 bytes = msg->sov - msg->som;
4414 if (msg->chunk_len || bytes) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4415 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]4416 if (likely(bytes < 0)) /* sov may have wrapped at the end */
4417 bytes += req->size;
4418 msg->chunk_len += (unsigned int)bytes;
4419 msg->chunk_len -= buffer_forward(req, msg->chunk_len);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4420 }
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4421
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4422 if (msg->msg_state == HTTP_MSG_DATA) {
4423 /* must still forward */
4424 if (req->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4425 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4426
4427 /* nothing left to forward */
4428 if (txn->flags & TX_REQ_TE_CHNK)
4429 msg->msg_state = HTTP_MSG_DATA_CRLF;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4430 else
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4431 msg->msg_state = HTTP_MSG_DONE;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4432 }
4433 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]4434 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4435 * set ->sov and ->lr to point to the body and switch to DATA or
4436 * TRAILERS state.
4437 */
4438 int ret = http_parse_chunk_size(req, msg);
4439
4440 if (!ret)
4441 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4442 else if (ret < 0) {
4443 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4444 if (msg->err_pos >= 0)
4445 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]4446 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4447 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4448 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4449 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4450 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
4451 /* we want the CRLF after the data */
4452 int ret;
4453
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]4454 req->lr = req->w + req->send_max;
4455 if (req->lr >= req->data + req->size)
4456 req->lr -= req->size;
4457
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4458 ret = http_skip_chunk_crlf(req, msg);
4459
4460 if (ret == 0)
4461 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4462 else if (ret < 0) {
4463 session_inc_http_err_ctr(s);
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4464 if (msg->err_pos >= 0)
4465 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]4466 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4467 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4468 /* we're in MSG_CHUNK_SIZE now */
4469 }
4470 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
4471 int ret = http_forward_trailers(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_TRAILERS, 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 HTTP_MSG_DONE now */
4482 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4483 else {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4484 int old_state = msg->msg_state;
4485
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4486 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4487 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4488 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
4489 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
4490 buffer_dont_close(req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4491 if (http_resync_states(s)) {
4492 /* some state changes occurred, maybe the analyser
4493 * was disabled too.
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]4494 */
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4495 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4496 if (req->flags & BF_SHUTW) {
4497 /* request errors are most likely due to
4498 * the server aborting the transfer.
4499 */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4500 goto aborted_xfer;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4501 }
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]4502 if (msg->err_pos >= 0)
4503 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]4504 goto return_bad_req;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]4505 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4506 return 1;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4507 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4508
4509 /* If "option abortonclose" is set on the backend, we
4510 * want to monitor the client's connection and forward
4511 * any shutdown notification to the server, which will
4512 * decide whether to close or to go on processing the
4513 * request.
4514 */
4515 if (s->be->options & PR_O_ABRT_CLOSE) {
4516 buffer_auto_read(req);
4517 buffer_auto_close(req);
4518 }
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4519 else if (s->txn.meth == HTTP_METH_POST) {
4520 /* POST requests may require to read extra CRLF
4521 * sent by broken browsers and which could cause
4522 * an RST to be sent upon close on some systems
4523 * (eg: Linux).
4524 */
4525 buffer_auto_read(req);
4526 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4527
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4528 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4529 }
4530 }
4531
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4532 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4533 /* stop waiting for data if the input is closed before the end */
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4534 if (req->flags & BF_SHUTR) {
4535 if (!(s->flags & SN_ERR_MASK))
4536 s->flags |= SN_ERR_CLICL;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4537 if (!(s->flags & SN_FINST_MASK)) {
4538 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4539 s->flags |= SN_FINST_H;
4540 else
4541 s->flags |= SN_FINST_D;
4542 }
4543
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4544 s->fe->fe_counters.cli_aborts++;
4545 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4546 if (target_srv(&s->target))
4547 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4548
4549 goto return_bad_req_stats_ok;
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4550 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4551
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4552 /* waiting for the last bits to leave the buffer */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4553 if (req->flags & BF_SHUTW)
4554 goto aborted_xfer;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4555
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4556 /* When TE: chunked is used, we need to get there again to parse remaining
4557 * chunks even if the client has closed, so we don't want to set BF_DONTCLOSE.
4558 */
4559 if (txn->flags & TX_REQ_TE_CHNK)
4560 buffer_dont_close(req);
4561
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4562 /* We know that more data are expected, but we couldn't send more that
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]4563 * what we did. So we always set the BF_EXPECT_MORE flag so that the
4564 * system knows it must not set a PUSH on this first part. Interactive
4565 * modes are already handled by the stream sock layer.
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4566 */
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]4567 req->flags |= BF_EXPECT_MORE;
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]4568
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4569 http_silent_debug(__LINE__, s);
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4570 return 0;
4571
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4572 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4573 s->fe->fe_counters.failed_req++;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4574 if (s->listener->counters)
4575 s->listener->counters->failed_req++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4576 return_bad_req_stats_ok:
4577 txn->req.msg_state = HTTP_MSG_ERROR;
4578 if (txn->status) {
4579 /* Note: we don't send any error if some data were already sent */
4580 stream_int_retnclose(req->prod, NULL);
4581 } else {
4582 txn->status = 400;
4583 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
4584 }
4585 req->analysers = 0;
4586 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]4587
4588 if (!(s->flags & SN_ERR_MASK))
4589 s->flags |= SN_ERR_PRXCOND;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4590 if (!(s->flags & SN_FINST_MASK)) {
4591 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4592 s->flags |= SN_FINST_H;
4593 else
4594 s->flags |= SN_FINST_D;
4595 }
4596 return 0;
4597
4598 aborted_xfer:
4599 txn->req.msg_state = HTTP_MSG_ERROR;
4600 if (txn->status) {
4601 /* Note: we don't send any error if some data were already sent */
4602 stream_int_retnclose(req->prod, NULL);
4603 } else {
4604 txn->status = 502;
4605 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_502));
4606 }
4607 req->analysers = 0;
4608 s->rep->analysers = 0; /* we're in data phase, we want to abort both directions */
4609
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4610 s->fe->fe_counters.srv_aborts++;
4611 s->be->be_counters.srv_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4612 if (target_srv(&s->target))
4613 target_srv(&s->target)->counters.srv_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]4614
4615 if (!(s->flags & SN_ERR_MASK))
4616 s->flags |= SN_ERR_SRVCL;
4617 if (!(s->flags & SN_FINST_MASK)) {
4618 if (txn->rsp.msg_state < HTTP_MSG_ERROR)
4619 s->flags |= SN_FINST_H;
4620 else
4621 s->flags |= SN_FINST_D;
4622 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4623 return 0;
4624}
4625
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4626/* This stream analyser waits for a complete HTTP response. It returns 1 if the
4627 * processing can continue on next analysers, or zero if it either needs more
4628 * data or wants to immediately abort the response (eg: timeout, error, ...). It
4629 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
4630 * when it has nothing left to do, and may remove any analyser when it wants to
4631 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4632 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4633int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4634{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4635 struct http_txn *txn = &s->txn;
4636 struct http_msg *msg = &txn->rsp;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4637 struct hdr_ctx ctx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4638 int use_close_only;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4639 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4640 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]4641
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4642 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]4643 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4644 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4645 rep,
4646 rep->rex, rep->wex,
4647 rep->flags,
4648 rep->l,
4649 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]4650
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4651 /*
4652 * Now parse the partial (or complete) lines.
4653 * We will check the response syntax, and also join multi-line
4654 * headers. An index of all the lines will be elaborated while
4655 * parsing.
4656 *
4657 * For the parsing, we use a 28 states FSM.
4658 *
4659 * Here is the information we currently have :
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4660 * rep->data + msg->som = beginning of response
4661 * rep->data + msg->eoh = end of processed headers / start of current one
4662 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4663 * rep->lr = first non-visited byte
4664 * rep->r = end of data
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4665 * Once we reach MSG_BODY, rep->sol = rep->data + msg->som
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4666 */
4667
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4668 /* There's a protected area at the end of the buffer for rewriting
4669 * purposes. We don't want to start to parse the request if the
4670 * protected area is affected, because we may have to move processed
4671 * data later, which is much more complicated.
4672 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4673 if (rep->l && msg->msg_state < HTTP_MSG_ERROR) {
4674 if (unlikely((rep->flags & BF_FULL) ||
4675 rep->r < rep->lr ||
4676 rep->r > rep->data + rep->size - global.tune.maxrewrite)) {
4677 if (rep->send_max) {
4678 /* some data has still not left the buffer, wake us once that's done */
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4679 if (rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
4680 goto abort_response;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4681 buffer_dont_close(rep);
4682 rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
4683 return 0;
4684 }
4685 if (rep->l <= rep->size - global.tune.maxrewrite)
4686 http_buffer_heavy_realign(rep, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4687 }
4688
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4689 if (likely(rep->lr < rep->r))
4690 http_msg_analyzer(rep, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4691 }
4692
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4693 /* 1: we might have to print this header in debug mode */
4694 if (unlikely((global.mode & MODE_DEBUG) &&
4695 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]4696 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4697 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4698 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4699
Willy Tarreau663308b2010-06-07 14:06:08 +0200[diff] [blame]4700 sol = rep->data + msg->som;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]4701 eol = sol + msg->sl.st.l;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4702 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4703
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4704 sol += hdr_idx_first_pos(&txn->hdr_idx);
4705 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4706
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4707 while (cur_idx) {
4708 eol = sol + txn->hdr_idx.v[cur_idx].len;
4709 debug_hdr("srvhdr", s, sol, eol);
4710 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
4711 cur_idx = txn->hdr_idx.v[cur_idx].next;
4712 }
4713 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4714
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4715 /*
4716 * Now we quickly check if we have found a full valid response.
4717 * If not so, we check the FD and buffer states before leaving.
4718 * A full response is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4719 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4720 * responses are checked first.
4721 *
4722 * Depending on whether the client is still there or not, we
4723 * may send an error response back or not. Note that normally
4724 * we should only check for HTTP status there, and check I/O
4725 * errors somewhere else.
4726 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4727
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4728 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4729 /* Invalid response */
4730 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4731 /* we detected a parsing error. We want to archive this response
4732 * in the dedicated proxy area for later troubleshooting.
4733 */
4734 hdr_response_bad:
4735 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4736 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]4737
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4738 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4739 if (target_srv(&s->target)) {
4740 target_srv(&s->target)->counters.failed_resp++;
4741 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_HDRRSP);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4742 }
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4743 abort_response:
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4744 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4745 rep->analysers = 0;
4746 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4747 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4748 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4749 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
4750
4751 if (!(s->flags & SN_ERR_MASK))
4752 s->flags |= SN_ERR_PRXCOND;
4753 if (!(s->flags & SN_FINST_MASK))
4754 s->flags |= SN_FINST_H;
4755
4756 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4757 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4758
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4759 /* too large response does not fit in buffer. */
4760 else if (rep->flags & BF_FULL) {
4761 goto hdr_response_bad;
4762 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4763
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4764 /* read error */
4765 else if (rep->flags & BF_READ_ERROR) {
4766 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4767 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]4768
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4769 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4770 if (target_srv(&s->target)) {
4771 target_srv(&s->target)->counters.failed_resp++;
4772 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_READ_ERROR);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4773 }
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]4774
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4775 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4776 rep->analysers = 0;
4777 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4778 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4779 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4780 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4781
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4782 if (!(s->flags & SN_ERR_MASK))
4783 s->flags |= SN_ERR_SRVCL;
4784 if (!(s->flags & SN_FINST_MASK))
4785 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]4786 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4787 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4788
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4789 /* read timeout : return a 504 to the client. */
4790 else if (rep->flags & BF_READ_TIMEOUT) {
4791 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4792 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]4793
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4794 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4795 if (target_srv(&s->target)) {
4796 target_srv(&s->target)->counters.failed_resp++;
4797 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4798 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4799
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4800 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4801 rep->analysers = 0;
4802 txn->status = 504;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4803 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4804 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4805 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4806
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4807 if (!(s->flags & SN_ERR_MASK))
4808 s->flags |= SN_ERR_SRVTO;
4809 if (!(s->flags & SN_FINST_MASK))
4810 s->flags |= SN_FINST_H;
4811 return 0;
4812 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]4813
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4814 /* close from server */
4815 else if (rep->flags & BF_SHUTR) {
4816 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4817 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]4818
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4819 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4820 if (target_srv(&s->target)) {
4821 target_srv(&s->target)->counters.failed_resp++;
4822 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4823 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4824
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4825 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4826 rep->analysers = 0;
4827 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4828 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4829 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4830 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4831
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4832 if (!(s->flags & SN_ERR_MASK))
4833 s->flags |= SN_ERR_SRVCL;
4834 if (!(s->flags & SN_FINST_MASK))
4835 s->flags |= SN_FINST_H;
4836 return 0;
4837 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4838
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4839 /* write error to client (we don't send any message then) */
4840 else if (rep->flags & BF_WRITE_ERROR) {
4841 if (msg->err_pos >= 0)
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4842 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]4843
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]4844 s->be->be_counters.failed_resp++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4845 rep->analysers = 0;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4846 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4847
4848 if (!(s->flags & SN_ERR_MASK))
4849 s->flags |= SN_ERR_CLICL;
4850 if (!(s->flags & SN_FINST_MASK))
4851 s->flags |= SN_FINST_H;
4852
4853 /* process_session() will take care of the error */
4854 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4855 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4856
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4857 buffer_dont_close(rep);
4858 return 0;
4859 }
4860
4861 /* More interesting part now : we know that we have a complete
4862 * response which at least looks like HTTP. We have an indicator
4863 * of each header's length, so we can parse them quickly.
4864 */
4865
4866 if (unlikely(msg->err_pos >= 0))
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]4867 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]4868
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4869 /*
4870 * 1: get the status code
4871 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4872 n = msg->sol[msg->sl.st.c] - '0';
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4873 if (n < 1 || n > 5)
4874 n = 0;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4875 /* when the client triggers a 4xx from the server, it's most often due
4876 * to a missing object or permission. These events should be tracked
4877 * because if they happen often, it may indicate a brute force or a
4878 * vulnerability scan.
4879 */
4880 if (n == 4)
4881 session_inc_http_err_ctr(s);
4882
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4883 if (target_srv(&s->target))
4884 target_srv(&s->target)->counters.p.http.rsp[n]++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4885
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4886 /* check if the response is HTTP/1.1 or above */
4887 if ((msg->sl.st.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4888 ((msg->sol[5] > '1') ||
4889 ((msg->sol[5] == '1') &&
4890 (msg->sol[7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4891 txn->flags |= TX_RES_VER_11;
4892
4893 /* "connection" has not been parsed yet */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4894 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]4895
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4896 /* transfer length unknown*/
4897 txn->flags &= ~TX_RES_XFER_LEN;
4898
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4899 txn->status = strl2ui(msg->sol + msg->sl.st.c, msg->sl.st.c_l);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4900
Willy Tarreau39650402010-03-15 19:44:39 +0100[diff] [blame]4901 /* Adjust server's health based on status code. Note: status codes 501
4902 * and 505 are triggered on demand by client request, so we must not
4903 * count them as server failures.
4904 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4905 if (target_srv(&s->target)) {
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4906 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4907 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_OK);
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4908 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]4909 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_STS);
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4910 }
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4911
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4912 /*
4913 * 2: check for cacheability.
4914 */
4915
4916 switch (txn->status) {
4917 case 200:
4918 case 203:
4919 case 206:
4920 case 300:
4921 case 301:
4922 case 410:
4923 /* RFC2616 @13.4:
4924 * "A response received with a status code of
4925 * 200, 203, 206, 300, 301 or 410 MAY be stored
4926 * by a cache (...) unless a cache-control
4927 * directive prohibits caching."
4928 *
4929 * RFC2616 @9.5: POST method :
4930 * "Responses to this method are not cacheable,
4931 * unless the response includes appropriate
4932 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4933 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4934 if (likely(txn->meth != HTTP_METH_POST) &&
4935 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
4936 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4937 break;
4938 default:
4939 break;
4940 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4941
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4942 /*
4943 * 3: we may need to capture headers
4944 */
4945 s->logs.logwait &= ~LW_RESP;
4946 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4947 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4948 txn->rsp.cap, s->fe->rsp_cap);
4949
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4950 /* 4: determine the transfer-length.
4951 * According to RFC2616 #4.4, amended by the HTTPbis working group,
4952 * the presence of a message-body in a RESPONSE and its transfer length
4953 * must be determined that way :
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4954 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4955 * All responses to the HEAD request method MUST NOT include a
4956 * message-body, even though the presence of entity-header fields
4957 * might lead one to believe they do. All 1xx (informational), 204
4958 * (No Content), and 304 (Not Modified) responses MUST NOT include a
4959 * message-body. All other responses do include a message-body,
4960 * although it MAY be of zero length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4961 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4962 * 1. Any response which "MUST NOT" include a message-body (such as the
4963 * 1xx, 204 and 304 responses and any response to a HEAD request) is
4964 * always terminated by the first empty line after the header fields,
4965 * regardless of the entity-header fields present in the message.
4966 *
4967 * 2. If a Transfer-Encoding header field (Section 9.7) is present and
4968 * the "chunked" transfer-coding (Section 6.2) is used, the
4969 * transfer-length is defined by the use of this transfer-coding.
4970 * If a Transfer-Encoding header field is present and the "chunked"
4971 * transfer-coding is not present, the transfer-length is defined by
4972 * the sender closing the connection.
4973 *
4974 * 3. If a Content-Length header field is present, its decimal value in
4975 * OCTETs represents both the entity-length and the transfer-length.
4976 * If a message is received with both a Transfer-Encoding header
4977 * field and a Content-Length header field, the latter MUST be ignored.
4978 *
4979 * 4. If the message uses the media type "multipart/byteranges", and
4980 * the transfer-length is not otherwise specified, then this self-
4981 * delimiting media type defines the transfer-length. This media
4982 * type MUST NOT be used unless the sender knows that the recipient
4983 * can parse it; the presence in a request of a Range header with
4984 * multiple byte-range specifiers from a 1.1 client implies that the
4985 * client can parse multipart/byteranges responses.
4986 *
4987 * 5. By the server closing the connection.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4988 */
4989
4990 /* Skip parsing if no content length is possible. The response flags
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]4991 * remain 0 as well as the chunk_len, which may or may not mirror
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4992 * the real header value, and we note that we know the response's length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4993 * FIXME: should we parse anyway and return an error on chunked encoding ?
4994 */
4995 if (txn->meth == HTTP_METH_HEAD ||
4996 (txn->status >= 100 && txn->status < 200) ||
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4997 txn->status == 204 || txn->status == 304) {
4998 txn->flags |= TX_RES_XFER_LEN;
4999 goto skip_content_length;
5000 }
5001
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5002 use_close_only = 0;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5003 ctx.idx = 0;
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]5004 while ((txn->flags & TX_RES_VER_11) &&
5005 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5006 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
5007 txn->flags |= (TX_RES_TE_CHNK | TX_RES_XFER_LEN);
5008 else if (txn->flags & TX_RES_TE_CHNK) {
5009 /* bad transfer-encoding (chunked followed by something else) */
5010 use_close_only = 1;
5011 txn->flags &= ~(TX_RES_TE_CHNK | TX_RES_XFER_LEN);
5012 break;
5013 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5014 }
5015
5016 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
5017 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5018 while (!(txn->flags & TX_RES_TE_CHNK) && !use_close_only &&
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5019 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
5020 signed long long cl;
5021
5022 if (!ctx.vlen)
5023 goto hdr_response_bad;
5024
5025 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
5026 goto hdr_response_bad; /* parse failure */
5027
5028 if (cl < 0)
5029 goto hdr_response_bad;
5030
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5031 if ((txn->flags & TX_RES_CNT_LEN) && (msg->chunk_len != cl))
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5032 goto hdr_response_bad; /* already specified, was different */
5033
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5034 txn->flags |= TX_RES_CNT_LEN | TX_RES_XFER_LEN;
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5035 msg->body_len = msg->chunk_len = cl;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5036 }
5037
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]5038 /* FIXME: we should also implement the multipart/byterange method.
5039 * For now on, we resort to close mode in this case (unknown length).
5040 */
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5041skip_content_length:
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]5042
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5043 /* end of job, return OK */
5044 rep->analysers &= ~an_bit;
5045 rep->analyse_exp = TICK_ETERNITY;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]5046 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5047 return 1;
5048}
5049
5050/* This function performs all the processing enabled for the current response.
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5051 * It normally returns 1 unless it wants to break. It relies on buffers flags,
5052 * and updates t->rep->analysers. It might make sense to explode it into several
5053 * other functions. It works like process_request (see indications above).
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5054 */
5055int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
5056{
5057 struct http_txn *txn = &t->txn;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5058 struct http_msg *msg = &txn->rsp;
5059 struct proxy *cur_proxy;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]5060 struct cond_wordlist *wl;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5061
5062 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
5063 now_ms, __FUNCTION__,
5064 t,
5065 rep,
5066 rep->rex, rep->wex,
5067 rep->flags,
5068 rep->l,
5069 rep->analysers);
5070
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]5071 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5072 return 0;
5073
5074 rep->analysers &= ~an_bit;
5075 rep->analyse_exp = TICK_ETERNITY;
5076
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5077 /* Now we have to check if we need to modify the Connection header.
5078 * This is more difficult on the response than it is on the request,
5079 * because we can have two different HTTP versions and we don't know
5080 * how the client will interprete a response. For instance, let's say
5081 * that the client sends a keep-alive request in HTTP/1.0 and gets an
5082 * HTTP/1.1 response without any header. Maybe it will bound itself to
5083 * HTTP/1.0 because it only knows about it, and will consider the lack
5084 * of header as a close, or maybe it knows HTTP/1.1 and can consider
5085 * the lack of header as a keep-alive. Thus we will use two flags
5086 * indicating how a request MAY be understood by the client. In case
5087 * of multiple possibilities, we'll fix the header to be explicit. If
5088 * ambiguous cases such as both close and keepalive are seen, then we
5089 * will fall back to explicit close. Note that we won't take risks with
5090 * HTTP/1.0 clients which may not necessarily understand keep-alive.
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5091 * See doc/internals/connection-header.txt for the complete matrix.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5092 */
5093
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5094 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
5095 txn->status == 101)) {
5096 /* Either we've established an explicit tunnel, or we're
5097 * switching the protocol. In both cases, we're very unlikely
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5098 * to understand the next protocols. We have to switch to tunnel
5099 * mode, so that we transfer the request and responses then let
5100 * this protocol pass unmodified. When we later implement specific
5101 * parsers for such protocols, we'll want to check the Upgrade
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5102 * header which contains information about that protocol for
5103 * responses with status 101 (eg: see RFC2817 about TLS).
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5104 */
5105 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
5106 }
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5107 else if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) &&
5108 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN ||
5109 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE))) {
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5110 int to_del = 0;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5111
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5112 /* on unknown transfer length, we must close */
5113 if (!(txn->flags & TX_RES_XFER_LEN) &&
5114 (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
5115 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5116
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5117 /* now adjust header transformations depending on current state */
5118 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN ||
5119 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
5120 to_del |= 2; /* remove "keep-alive" on any response */
5121 if (!(txn->flags & TX_RES_VER_11))
5122 to_del |= 1; /* remove "close" for HTTP/1.0 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5123 }
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5124 else { /* SCL / KAL */
5125 to_del |= 1; /* remove "close" on any response */
5126 if ((txn->flags & (TX_RES_VER_11|TX_REQ_VER_11)) == (TX_RES_VER_11|TX_REQ_VER_11))
5127 to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5128 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5129
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5130 /* Parse and remove some headers from the connection header */
5131 http_parse_connection_header(txn, msg, rep, to_del);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5132
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5133 /* Some keep-alive responses are converted to Server-close if
5134 * the server wants to close.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5135 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5136 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) {
5137 if ((txn->flags & TX_HDR_CONN_CLO) ||
5138 (txn->flags & (TX_HDR_CONN_KAL|TX_RES_VER_11)) == 0)
5139 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5140 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]5141 }
5142
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]5143 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5144 /*
5145 * 3: we will have to evaluate the filters.
5146 * As opposed to version 1.2, now they will be evaluated in the
5147 * filters order and not in the header order. This means that
5148 * each filter has to be validated among all headers.
5149 *
5150 * Filters are tried with ->be first, then with ->fe if it is
5151 * different from ->be.
5152 */
5153
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5154 cur_proxy = t->be;
5155 while (1) {
5156 struct proxy *rule_set = cur_proxy;
5157
5158 /* try headers filters */
5159 if (rule_set->rsp_exp != NULL) {
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5160 if (apply_filters_to_response(t, rep, rule_set) < 0) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5161 return_bad_resp:
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5162 if (target_srv(&t->target)) {
5163 target_srv(&t->target)->counters.failed_resp++;
5164 health_adjust(target_srv(&t->target), HANA_STATUS_HTTP_RSP);
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]5165 }
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5166 t->be->be_counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5167 return_srv_prx_502:
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]5168 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5169 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]5170 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]5171 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreau8e89b842009-10-18 23:56:35 +0200[diff] [blame]5172 stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5173 if (!(t->flags & SN_ERR_MASK))
5174 t->flags |= SN_ERR_PRXCOND;
5175 if (!(t->flags & SN_FINST_MASK))
5176 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]5177 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5178 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5179 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5180
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5181 /* has the response been denied ? */
5182 if (txn->flags & TX_SVDENY) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5183 if (target_srv(&t->target))
5184 target_srv(&t->target)->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5185
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5186 t->be->be_counters.denied_resp++;
5187 t->fe->fe_counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5188 if (t->listener->counters)
5189 t->listener->counters->denied_resp++;
5190
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5191 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]5192 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5193
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5194 /* add response headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]5195 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]5196 if (txn->status < 200)
5197 break;
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5198 if (wl->cond) {
5199 int ret = acl_exec_cond(wl->cond, px, t, txn, ACL_DIR_RTR);
5200 ret = acl_pass(ret);
5201 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
5202 ret = !ret;
5203 if (!ret)
5204 continue;
5205 }
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]5206 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]5207 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]5208 }
5209
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5210 /* check whether we're already working on the frontend */
5211 if (cur_proxy == t->fe)
5212 break;
5213 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5214 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5215
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5216 /*
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5217 * We may be facing a 100-continue response, in which case this
5218 * is not the right response, and we're waiting for the next one.
5219 * Let's allow this response to go to the client and wait for the
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5220 * next one.
5221 */
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5222 if (unlikely(txn->status == 100)) {
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5223 hdr_idx_init(&txn->hdr_idx);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5224 buffer_forward(rep, rep->lr - msg->sol);
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5225 msg->msg_state = HTTP_MSG_RPBEFORE;
5226 txn->status = 0;
5227 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
5228 return 1;
5229 }
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5230 else if (unlikely(txn->status < 200))
5231 goto skip_header_mangling;
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5232
5233 /* we don't have any 1xx status code now */
5234
5235 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5236 * 4: check for server cookie.
5237 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5238 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name ||
5239 (t->be->options & PR_O_CHK_CACHE))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5240 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5241
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5242
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5243 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5244 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5245 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5246 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5247 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5248
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5249 /*
5250 * 6: add server cookie in the response if needed
5251 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5252 if (target_srv(&t->target) && (t->be->options & PR_O_COOK_INS) &&
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]5253 !((txn->flags & TX_SCK_FOUND) && (t->be->options2 & PR_O2_COOK_PSV)) &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5254 (!(t->flags & SN_DIRECT) ||
5255 ((t->be->cookie_maxidle || txn->cookie_last_date) &&
5256 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
5257 (t->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
5258 (!t->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]5259 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) &&
5260 !(t->flags & SN_IGNORE_PRST)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5261 int len;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5262 /* the server is known, it's not the one the client requested, or the
5263 * cookie's last seen date needs to be refreshed. We have to
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5264 * insert a set-cookie here, except if we want to insert only on POST
5265 * requests and this one isn't. Note that servers which don't have cookies
5266 * (eg: some backup servers) will return a full cookie removal request.
5267 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5268 if (!target_srv(&t->target)->cookie) {
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5269 len = sprintf(trash,
5270 "Set-Cookie: %s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
5271 t->be->cookie_name);
5272 }
5273 else {
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5274 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]5275
5276 if (t->be->cookie_maxidle || t->be->cookie_maxlife) {
5277 /* emit last_date, which is mandatory */
5278 trash[len++] = COOKIE_DELIM_DATE;
5279 s30tob64((date.tv_sec+3) >> 2, trash + len); len += 5;
5280 if (t->be->cookie_maxlife) {
5281 /* emit first_date, which is either the original one or
5282 * the current date.
5283 */
5284 trash[len++] = COOKIE_DELIM_DATE;
5285 s30tob64(txn->cookie_first_date ?
5286 txn->cookie_first_date >> 2 :
5287 (date.tv_sec+3) >> 2, trash + len);
5288 len += 5;
5289 }
5290 }
5291 len += sprintf(trash + len, "; path=/");
5292 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5293
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5294 if (t->be->cookie_domain)
5295 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5296
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5297 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]5298 trash, len) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5299 goto return_bad_resp;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5300
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5301 txn->flags &= ~TX_SCK_MASK;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5302 if (target_srv(&t->target)->cookie && (t->flags & SN_DIRECT))
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5303 /* the server did not change, only the date was updated */
5304 txn->flags |= TX_SCK_UPDATED;
5305 else
5306 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5307
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5308 /* Here, we will tell an eventual cache on the client side that we don't
5309 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
5310 * Some caches understand the correct form: 'no-cache="set-cookie"', but
5311 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
5312 */
5313 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5314
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5315 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
5316
5317 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]5318 "Cache-control: private", 22) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5319 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5320 }
5321 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5322
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5323 /*
5324 * 7: check if result will be cacheable with a cookie.
5325 * We'll block the response if security checks have caught
5326 * nasty things such as a cacheable cookie.
5327 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5328 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
5329 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5330 (t->be->options & PR_O_CHK_CACHE)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5331
5332 /* we're in presence of a cacheable response containing
5333 * a set-cookie header. We'll block it as requested by
5334 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5335 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5336 if (target_srv(&t->target))
5337 target_srv(&t->target)->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5338
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5339 t->be->be_counters.denied_resp++;
5340 t->fe->fe_counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5341 if (t->listener->counters)
5342 t->listener->counters->denied_resp++;
5343
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5344 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5345 t->be->id, target_srv(&t->target) ? target_srv(&t->target)->id : "<dispatch>");
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5346 send_log(t->be, LOG_ALERT,
5347 "Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5348 t->be->id, target_srv(&t->target) ? target_srv(&t->target)->id : "<dispatch>");
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5349 goto return_srv_prx_502;
5350 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5351
5352 /*
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5353 * 8: adjust "Connection: close" or "Connection: keep-alive" if needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5354 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5355 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
5356 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE)) {
5357 unsigned int want_flags = 0;
5358
5359 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5360 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
5361 /* we want a keep-alive response here. Keep-alive header
5362 * required if either side is not 1.1.
5363 */
5364 if ((txn->flags & (TX_REQ_VER_11|TX_RES_VER_11)) != (TX_REQ_VER_11|TX_RES_VER_11))
5365 want_flags |= TX_CON_KAL_SET;
5366 }
5367 else {
5368 /* we want a close response here. Close header required if
5369 * the server is 1.1, regardless of the client.
5370 */
5371 if (txn->flags & TX_RES_VER_11)
5372 want_flags |= TX_CON_CLO_SET;
5373 }
5374
5375 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
5376 http_change_connection_header(txn, msg, rep, want_flags);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5377 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5378
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5379 skip_header_mangling:
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5380 if ((txn->flags & TX_RES_XFER_LEN) ||
5381 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5382 rep->analysers |= AN_RES_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]5383
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5384 /*************************************************************
5385 * OK, that's finished for the headers. We have done what we *
5386 * could. Let's switch to the DATA state. *
5387 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5388
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5389 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5390
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5391 /* if the user wants to log as soon as possible, without counting
5392 * bytes from the server, then this is the right moment. We have
5393 * to temporarily assign bytes_out to log what we currently have.
5394 */
5395 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
5396 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
5397 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]5398 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5399 t->logs.bytes_out = 0;
5400 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5401
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5402 /* Note: we must not try to cheat by jumping directly to DATA,
5403 * otherwise we would not let the client side wake up.
5404 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5405
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5406 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5407 }
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5408 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5409}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5410
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5411/* This function is an analyser which forwards response body (including chunk
5412 * sizes if any). It is called as soon as we must forward, even if we forward
5413 * zero byte. The only situation where it must not be called is when we're in
5414 * tunnel mode and we want to forward till the close. It's used both to forward
5415 * remaining data and to resync after end of body. It expects the msg_state to
5416 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
5417 * 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]5418 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5419 * bytes of pending data + the headers if not already done (between som and sov).
5420 * It eventually adjusts som to match sov after the data in between have been sent.
5421 */
5422int http_response_forward_body(struct session *s, struct buffer *res, int an_bit)
5423{
5424 struct http_txn *txn = &s->txn;
5425 struct http_msg *msg = &s->txn.rsp;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5426 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5427
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5428 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
5429 return 0;
5430
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5431 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]5432 ((res->flags & BF_SHUTW) && (res->to_forward || res->send_max)) ||
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5433 !s->req->analysers) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5434 /* Output closed while we were sending data. We must abort and
5435 * wake the other side up.
5436 */
5437 msg->msg_state = HTTP_MSG_ERROR;
5438 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]5439 return 1;
5440 }
5441
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5442 /* in most states, we should abort in case of early close */
5443 buffer_auto_close(res);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5444
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5445 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
5446 /* we have msg->col and msg->sov which both point to the first
5447 * byte of message body. msg->som still points to the beginning
5448 * of the message. We must save the body in req->lr because it
5449 * survives buffer re-alignments.
5450 */
5451 res->lr = res->data + msg->sov;
5452 if (txn->flags & TX_RES_TE_CHNK)
5453 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
5454 else {
5455 msg->msg_state = HTTP_MSG_DATA;
5456 }
5457 }
5458
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5459 while (1) {
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5460 int bytes;
5461
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5462 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5463 /* we may have some data pending */
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5464 bytes = msg->sov - msg->som;
5465 if (msg->chunk_len || bytes) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5466 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5467 if (likely(bytes < 0)) /* sov may have wrapped at the end */
5468 bytes += res->size;
5469 msg->chunk_len += (unsigned int)bytes;
5470 msg->chunk_len -= buffer_forward(res, msg->chunk_len);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5471 }
5472
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5473
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5474 if (msg->msg_state == HTTP_MSG_DATA) {
5475 /* must still forward */
5476 if (res->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5477 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5478
5479 /* nothing left to forward */
5480 if (txn->flags & TX_RES_TE_CHNK)
5481 msg->msg_state = HTTP_MSG_DATA_CRLF;
5482 else
5483 msg->msg_state = HTTP_MSG_DONE;
5484 }
5485 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]5486 /* read the chunk size and assign it to ->chunk_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5487 * set ->sov to point to the body and switch to DATA or TRAILERS state.
5488 */
5489 int ret = http_parse_chunk_size(res, msg);
5490
5491 if (!ret)
5492 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5493 else if (ret < 0) {
5494 if (msg->err_pos >= 0)
5495 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]5496 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5497 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5498 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5499 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5500 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
5501 /* we want the CRLF after the data */
5502 int ret;
5503
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]5504 res->lr = res->w + res->send_max;
5505 if (res->lr >= res->data + res->size)
5506 res->lr -= res->size;
5507
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5508 ret = http_skip_chunk_crlf(res, msg);
5509
5510 if (!ret)
5511 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5512 else if (ret < 0) {
5513 if (msg->err_pos >= 0)
5514 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]5515 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5516 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5517 /* we're in MSG_CHUNK_SIZE now */
5518 }
5519 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
5520 int ret = http_forward_trailers(res, msg);
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5521
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5522 if (ret == 0)
5523 goto missing_data;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5524 else if (ret < 0) {
5525 if (msg->err_pos >= 0)
5526 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]5527 goto return_bad_res;
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5528 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5529 /* we're in HTTP_MSG_DONE now */
5530 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5531 else {
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5532 int old_state = msg->msg_state;
5533
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5534 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5535 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5536 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5537 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5538 buffer_dont_close(res);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5539 if (http_resync_states(s)) {
5540 http_silent_debug(__LINE__, s);
5541 /* some state changes occurred, maybe the analyser
5542 * was disabled too.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5543 */
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5544 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
5545 if (res->flags & BF_SHUTW) {
5546 /* response errors are most likely due to
5547 * the client aborting the transfer.
5548 */
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5549 goto aborted_xfer;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5550 }
Willy Tarreaue1582eb2010-12-12 13:10:11 +0100[diff] [blame]5551 if (msg->err_pos >= 0)
5552 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]5553 goto return_bad_res;
Willy Tarreau3fe693b2010-12-12 12:50:05 +0100[diff] [blame]5554 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5555 return 1;
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5556 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5557 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5558 }
5559 }
5560
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5561 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5562 /* stop waiting for data if the input is closed before the end */
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5563 if (res->flags & BF_SHUTR) {
5564 if (!(s->flags & SN_ERR_MASK))
5565 s->flags |= SN_ERR_SRVCL;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5566 s->be->be_counters.srv_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5567 if (target_srv(&s->target))
5568 target_srv(&s->target)->counters.srv_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5569 goto return_bad_res_stats_ok;
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5570 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5571
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5572 if (res->flags & BF_SHUTW)
5573 goto aborted_xfer;
5574
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5575 /* we need to obey the req analyser, so if it leaves, we must too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5576 if (!s->req->analysers)
5577 goto return_bad_res;
5578
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5579 /* forward any pending data */
5580 bytes = msg->sov - msg->som;
5581 if (msg->chunk_len || bytes) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5582 msg->som = msg->sov;
Willy Tarreaud8ee85a2011-03-28 16:06:28 +0200[diff] [blame]5583 if (likely(bytes < 0)) /* sov may have wrapped at the end */
5584 bytes += res->size;
5585 msg->chunk_len += (unsigned int)bytes;
5586 msg->chunk_len -= buffer_forward(res, msg->chunk_len);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5587 }
5588
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5589 /* When TE: chunked is used, we need to get there again to parse remaining
5590 * chunks even if the server has closed, so we don't want to set BF_DONTCLOSE.
5591 * Similarly, with keep-alive on the client side, we don't want to forward a
5592 * close.
5593 */
5594 if ((txn->flags & TX_RES_TE_CHNK) ||
5595 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5596 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5597 buffer_dont_close(res);
5598
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5599 /* We know that more data are expected, but we couldn't send more that
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]5600 * what we did. So we always set the BF_EXPECT_MORE flag so that the
5601 * system knows it must not set a PUSH on this first part. Interactive
5602 * modes are already handled by the stream sock layer.
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5603 */
Willy Tarreau07293032011-05-30 18:29:28 +0200[diff] [blame]5604 res->flags |= BF_EXPECT_MORE;
Willy Tarreau5c620922011-05-11 19:56:11 +0200[diff] [blame]5605
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5606 /* the session handler will take care of timeouts and errors */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5607 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5608 return 0;
5609
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5610 return_bad_res: /* let's centralize all bad responses */
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5611 s->be->be_counters.failed_resp++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5612 if (target_srv(&s->target))
5613 target_srv(&s->target)->counters.failed_resp++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5614
5615 return_bad_res_stats_ok:
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5616 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]5617 /* don't send any error message as we're in the body */
5618 stream_int_retnclose(res->cons, NULL);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5619 res->analysers = 0;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5620 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]5621 if (target_srv(&s->target))
5622 health_adjust(target_srv(&s->target), HANA_STATUS_HTTP_HDRRSP);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5623
5624 if (!(s->flags & SN_ERR_MASK))
5625 s->flags |= SN_ERR_PRXCOND;
5626 if (!(s->flags & SN_FINST_MASK))
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5627 s->flags |= SN_FINST_D;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5628 return 0;
5629
5630 aborted_xfer:
5631 txn->rsp.msg_state = HTTP_MSG_ERROR;
5632 /* don't send any error message as we're in the body */
5633 stream_int_retnclose(res->cons, NULL);
5634 res->analysers = 0;
5635 s->req->analysers = 0; /* we're in data phase, we want to abort both directions */
5636
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5637 s->fe->fe_counters.cli_aborts++;
5638 s->be->be_counters.cli_aborts++;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]5639 if (target_srv(&s->target))
5640 target_srv(&s->target)->counters.cli_aborts++;
Willy Tarreaued2fd2d2010-12-29 11:23:27 +0100[diff] [blame]5641
5642 if (!(s->flags & SN_ERR_MASK))
5643 s->flags |= SN_ERR_CLICL;
5644 if (!(s->flags & SN_FINST_MASK))
5645 s->flags |= SN_FINST_D;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5646 return 0;
5647}
5648
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5649/* Iterate the same filter through all request headers.
5650 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5651 * Since it can manage the switch to another backend, it updates the per-proxy
5652 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5653 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5654int 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]5655{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5656 char term;
5657 char *cur_ptr, *cur_end, *cur_next;
5658 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5659 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5660 struct hdr_idx_elem *cur_hdr;
5661 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]5662
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5663 last_hdr = 0;
5664
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5665 cur_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5666 old_idx = 0;
5667
5668 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5669 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5670 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5671 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5672 (exp->action == ACT_ALLOW ||
5673 exp->action == ACT_DENY ||
5674 exp->action == ACT_TARPIT))
5675 return 0;
5676
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5677 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5678 if (!cur_idx)
5679 break;
5680
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5681 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5682 cur_ptr = cur_next;
5683 cur_end = cur_ptr + cur_hdr->len;
5684 cur_next = cur_end + cur_hdr->cr + 1;
5685
5686 /* Now we have one header between cur_ptr and cur_end,
5687 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5688 */
5689
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5690 /* The annoying part is that pattern matching needs
5691 * that we modify the contents to null-terminate all
5692 * strings before testing them.
5693 */
5694
5695 term = *cur_end;
5696 *cur_end = '\0';
5697
5698 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5699 switch (exp->action) {
5700 case ACT_SETBE:
5701 /* It is not possible to jump a second time.
5702 * FIXME: should we return an HTTP/500 here so that
5703 * the admin knows there's a problem ?
5704 */
5705 if (t->be != t->fe)
5706 break;
5707
5708 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5709 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5710 last_hdr = 1;
5711 break;
5712
5713 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5714 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5715 last_hdr = 1;
5716 break;
5717
5718 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5719 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5720 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5721
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5722 t->fe->fe_counters.denied_req++;
5723 if (t->fe != t->be)
5724 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5725 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5726 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5727
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5728 break;
5729
5730 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5731 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5732 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5733
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5734 t->fe->fe_counters.denied_req++;
5735 if (t->fe != t->be)
5736 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5737 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5738 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5739
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5740 break;
5741
5742 case ACT_REPLACE:
5743 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5744 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5745 /* FIXME: if the user adds a newline in the replacement, the
5746 * index will not be recalculated for now, and the new line
5747 * will not be counted as a new header.
5748 */
5749
5750 cur_end += delta;
5751 cur_next += delta;
5752 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5753 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5754 break;
5755
5756 case ACT_REMOVE:
5757 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
5758 cur_next += delta;
5759
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5760 http_msg_move_end(&txn->req, delta);
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5761 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5762 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5763 cur_hdr->len = 0;
5764 cur_end = NULL; /* null-term has been rewritten */
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]5765 cur_idx = old_idx;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5766 break;
5767
5768 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5769 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5770 if (cur_end)
5771 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5772
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5773 /* keep the link from this header to next one in case of later
5774 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5775 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5776 old_idx = cur_idx;
5777 }
5778 return 0;
5779}
5780
5781
5782/* Apply the filter to the request line.
5783 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5784 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5785 * Since it can manage the switch to another backend, it updates the per-proxy
5786 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5787 */
5788int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
5789{
5790 char term;
5791 char *cur_ptr, *cur_end;
5792 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5793 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5794 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5795
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5796
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5797 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5798 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5799 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5800 (exp->action == ACT_ALLOW ||
5801 exp->action == ACT_DENY ||
5802 exp->action == ACT_TARPIT))
5803 return 0;
5804 else if (exp->action == ACT_REMOVE)
5805 return 0;
5806
5807 done = 0;
5808
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5809 cur_ptr = txn->req.sol;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5810 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5811
5812 /* Now we have the request line between cur_ptr and cur_end */
5813
5814 /* The annoying part is that pattern matching needs
5815 * that we modify the contents to null-terminate all
5816 * strings before testing them.
5817 */
5818
5819 term = *cur_end;
5820 *cur_end = '\0';
5821
5822 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5823 switch (exp->action) {
5824 case ACT_SETBE:
5825 /* It is not possible to jump a second time.
5826 * FIXME: should we return an HTTP/500 here so that
5827 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5828 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5829 if (t->be != t->fe)
5830 break;
5831
5832 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5833 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5834 done = 1;
5835 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5836
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5837 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5838 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5839 done = 1;
5840 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5841
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5842 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5843 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5844
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5845 t->fe->fe_counters.denied_req++;
5846 if (t->fe != t->be)
5847 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5848 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5849 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5850
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5851 done = 1;
5852 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5853
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5854 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5855 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5856
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100[diff] [blame]5857 t->fe->fe_counters.denied_req++;
5858 if (t->fe != t->be)
5859 t->be->be_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5860 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5861 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5862
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5863 done = 1;
5864 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5865
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5866 case ACT_REPLACE:
5867 *cur_end = term; /* restore the string terminator */
5868 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5869 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5870 /* FIXME: if the user adds a newline in the replacement, the
5871 * index will not be recalculated for now, and the new line
5872 * will not be counted as a new header.
5873 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5874
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5875 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5876 cur_end += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5877 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5878 HTTP_MSG_RQMETH,
5879 cur_ptr, cur_end + 1,
5880 NULL, NULL);
5881 if (unlikely(!cur_end))
5882 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5883
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5884 /* we have a full request and we know that we have either a CR
5885 * or an LF at <ptr>.
5886 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5887 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
5888 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]5889 /* there is no point trying this regex on headers */
5890 return 1;
5891 }
5892 }
5893 *cur_end = term; /* restore the string terminator */
5894 return done;
5895}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]5896
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5897
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5898
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5899/*
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5900 * 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]5901 * 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]5902 * unparsable request. Since it can manage the switch to another backend, it
5903 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5904 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5905int apply_filters_to_request(struct session *s, struct buffer *req, struct proxy *px)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5906{
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5907 struct http_txn *txn = &s->txn;
5908 struct hdr_exp *exp;
5909
5910 for (exp = px->req_exp; exp; exp = exp->next) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5911 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5912
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5913 /*
5914 * The interleaving of transformations and verdicts
5915 * makes it difficult to decide to continue or stop
5916 * the evaluation.
5917 */
5918
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5919 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
5920 break;
5921
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5922 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5923 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5924 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5925 continue;
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5926
5927 /* if this filter had a condition, evaluate it now and skip to
5928 * next filter if the condition does not match.
5929 */
5930 if (exp->cond) {
5931 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_REQ);
5932 ret = acl_pass(ret);
5933 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
5934 ret = !ret;
5935
5936 if (!ret)
5937 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5938 }
5939
5940 /* Apply the filter to the request line. */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5941 ret = apply_filter_to_req_line(s, req, exp);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5942 if (unlikely(ret < 0))
5943 return -1;
5944
5945 if (likely(ret == 0)) {
5946 /* The filter did not match the request, it can be
5947 * iterated through all headers.
5948 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5949 apply_filter_to_req_headers(s, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5950 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5951 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5952 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5953}
5954
5955
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5956
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5957/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5958 * Try to retrieve the server associated to the appsession.
5959 * If the server is found, it's assigned to the session.
5960 */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5961void manage_client_side_appsession(struct session *t, const char *buf, int len) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5962 struct http_txn *txn = &t->txn;
5963 appsess *asession = NULL;
5964 char *sessid_temp = NULL;
5965
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5966 if (len > t->be->appsession_len) {
5967 len = t->be->appsession_len;
5968 }
5969
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5970 if (t->be->options2 & PR_O2_AS_REQL) {
5971 /* request-learn option is enabled : store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5972 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5973 /* 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]5974 pool_free2(apools.sessid, txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5975 }
5976
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5977 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5978 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5979 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5980 return;
5981 }
5982
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5983 memcpy(txn->sessid, buf, len);
5984 txn->sessid[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5985 }
5986
5987 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
5988 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5989 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5990 return;
5991 }
5992
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5993 memcpy(sessid_temp, buf, len);
5994 sessid_temp[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5995
5996 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
5997 /* free previously allocated memory */
5998 pool_free2(apools.sessid, sessid_temp);
5999
6000 if (asession != NULL) {
6001 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
6002 if (!(t->be->options2 & PR_O2_AS_REQL))
6003 asession->request_count++;
6004
6005 if (asession->serverid != NULL) {
6006 struct server *srv = t->be->srv;
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]6007
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6008 while (srv) {
6009 if (strcmp(srv->id, asession->serverid) == 0) {
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]6010 if ((srv->state & SRV_RUNNING) ||
6011 (t->be->options & PR_O_PERSIST) ||
6012 (t->flags & SN_FORCE_PRST)) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6013 /* we found the server and it's usable */
6014 txn->flags &= ~TX_CK_MASK;
Willy Tarreau2a6d88d2010-01-24 13:10:43 +0100[diff] [blame]6015 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6016 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]6017 set_target_server(&t->target, srv);
Willy Tarreau664beb82011-03-10 11:38:29 +0100[diff] [blame]6018
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6019 break;
6020 } else {
6021 txn->flags &= ~TX_CK_MASK;
6022 txn->flags |= TX_CK_DOWN;
6023 }
6024 }
6025 srv = srv->next;
6026 }
6027 }
6028 }
6029}
6030
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6031/* Find the end of a cookie value contained between <s> and <e>. It works the
6032 * same way as with headers above except that the semi-colon also ends a token.
6033 * See RFC2965 for more information. Note that it requires a valid header to
6034 * return a valid result.
6035 */
6036char *find_cookie_value_end(char *s, const char *e)
6037{
6038 int quoted, qdpair;
6039
6040 quoted = qdpair = 0;
6041 for (; s < e; s++) {
6042 if (qdpair) qdpair = 0;
6043 else if (quoted) {
6044 if (*s == '\\') qdpair = 1;
6045 else if (*s == '"') quoted = 0;
6046 }
6047 else if (*s == '"') quoted = 1;
6048 else if (*s == ',' || *s == ';') return s;
6049 }
6050 return s;
6051}
6052
6053/* Delete a value in a header between delimiters <from> and <next> in buffer
6054 * <buf>. The number of characters displaced is returned, and the pointer to
6055 * the first delimiter is updated if required. The function tries as much as
6056 * possible to respect the following principles :
6057 * - replace <from> delimiter by the <next> one unless <from> points to a
6058 * colon, in which case <next> is simply removed
6059 * - set exactly one space character after the new first delimiter, unless
6060 * there are not enough characters in the block being moved to do so.
6061 * - remove unneeded spaces before the previous delimiter and after the new
6062 * one.
6063 *
6064 * It is the caller's responsibility to ensure that :
6065 * - <from> points to a valid delimiter or the colon ;
6066 * - <next> points to a valid delimiter or the final CR/LF ;
6067 * - there are non-space chars before <from> ;
6068 * - there is a CR/LF at or after <next>.
6069 */
6070int del_hdr_value(struct buffer *buf, char **from, char *next)
6071{
6072 char *prev = *from;
6073
6074 if (*prev == ':') {
6075 /* We're removing the first value, preserve the colon and add a
6076 * space if possible.
6077 */
6078 if (!http_is_crlf[(unsigned char)*next])
6079 next++;
6080 prev++;
6081 if (prev < next)
6082 *prev++ = ' ';
6083
6084 while (http_is_spht[(unsigned char)*next])
6085 next++;
6086 } else {
6087 /* Remove useless spaces before the old delimiter. */
6088 while (http_is_spht[(unsigned char)*(prev-1)])
6089 prev--;
6090 *from = prev;
6091
6092 /* copy the delimiter and if possible a space if we're
6093 * not at the end of the line.
6094 */
6095 if (!http_is_crlf[(unsigned char)*next]) {
6096 *prev++ = *next++;
6097 if (prev + 1 < next)
6098 *prev++ = ' ';
6099 while (http_is_spht[(unsigned char)*next])
6100 next++;
6101 }
6102 }
6103 return buffer_replace2(buf, prev, next, NULL, 0);
6104}
6105
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6106/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6107 * Manage client-side cookie. It can impact performance by about 2% so it is
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6108 * desirable to call it only when needed. This code is quite complex because
6109 * of the multiple very crappy and ambiguous syntaxes we have to support. it
6110 * highly recommended not to touch this part without a good reason !
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6111 */
6112void manage_client_side_cookies(struct session *t, struct buffer *req)
6113{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6114 struct http_txn *txn = &t->txn;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6115 int preserve_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6116 int cur_idx, old_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6117 char *hdr_beg, *hdr_end, *hdr_next, *del_from;
6118 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6119
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6120 /* Iterate through the headers, we start with the start line. */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]6121 old_idx = 0;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6122 hdr_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6123
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6124 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6125 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6126 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6127
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6128 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6129 hdr_beg = hdr_next;
6130 hdr_end = hdr_beg + cur_hdr->len;
6131 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6132
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6133 /* We have one full header between hdr_beg and hdr_end, and the
6134 * next header starts at hdr_next. We're only interested in
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6135 * "Cookie:" headers.
6136 */
6137
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6138 val = http_header_match2(hdr_beg, hdr_end, "Cookie", 6);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6139 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6140 old_idx = cur_idx;
6141 continue;
6142 }
6143
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6144 del_from = NULL; /* nothing to be deleted */
6145 preserve_hdr = 0; /* assume we may kill the whole header */
6146
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6147 /* Now look for cookies. Conforming to RFC2109, we have to support
6148 * attributes whose name begin with a '$', and associate them with
6149 * the right cookie, if we want to delete this cookie.
6150 * So there are 3 cases for each cookie read :
6151 * 1) it's a special attribute, beginning with a '$' : ignore it.
6152 * 2) it's a server id cookie that we *MAY* want to delete : save
6153 * some pointers on it (last semi-colon, beginning of cookie...)
6154 * 3) it's an application cookie : we *MAY* have to delete a previous
6155 * "special" cookie.
6156 * At the end of loop, if a "special" cookie remains, we may have to
6157 * remove it. If no application cookie persists in the header, we
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6158 * *MUST* delete it.
6159 *
6160 * Note: RFC2965 is unclear about the processing of spaces around
6161 * the equal sign in the ATTR=VALUE form. A careful inspection of
6162 * the RFC explicitly allows spaces before it, and not within the
6163 * tokens (attrs or values). An inspection of RFC2109 allows that
6164 * too but section 10.1.3 lets one think that spaces may be allowed
6165 * after the equal sign too, resulting in some (rare) buggy
6166 * implementations trying to do that. So let's do what servers do.
6167 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
6168 * allowed quoted strings in values, with any possible character
6169 * after a backslash, including control chars and delimitors, which
6170 * causes parsing to become ambiguous. Browsers also allow spaces
6171 * within values even without quotes.
6172 *
6173 * We have to keep multiple pointers in order to support cookie
6174 * removal at the beginning, middle or end of header without
6175 * corrupting the header. All of these headers are valid :
6176 *
6177 * Cookie:NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3\r\n
6178 * Cookie:NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3\r\n
6179 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
6180 * | | | | | | | | |
6181 * | | | | | | | | hdr_end <--+
6182 * | | | | | | | +--> next
6183 * | | | | | | +----> val_end
6184 * | | | | | +-----------> val_beg
6185 * | | | | +--------------> equal
6186 * | | | +----------------> att_end
6187 * | | +---------------------> att_beg
6188 * | +--------------------------> prev
6189 * +--------------------------------> hdr_beg
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6190 */
6191
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6192 for (prev = hdr_beg + 6; prev < hdr_end; prev = next) {
6193 /* Iterate through all cookies on this line */
6194
6195 /* find att_beg */
6196 att_beg = prev + 1;
6197 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6198 att_beg++;
6199
6200 /* find att_end : this is the first character after the last non
6201 * space before the equal. It may be equal to hdr_end.
6202 */
6203 equal = att_end = att_beg;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6204
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6205 while (equal < hdr_end) {
6206 if (*equal == '=' || *equal == ',' || *equal == ';')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6207 break;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6208 if (http_is_spht[(unsigned char)*equal++])
6209 continue;
6210 att_end = equal;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6211 }
6212
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6213 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6214 * is between <att_beg> and <equal>, both may be identical.
6215 */
6216
6217 /* look for end of cookie if there is an equal sign */
6218 if (equal < hdr_end && *equal == '=') {
6219 /* look for the beginning of the value */
6220 val_beg = equal + 1;
6221 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6222 val_beg++;
6223
6224 /* find the end of the value, respecting quotes */
6225 next = find_cookie_value_end(val_beg, hdr_end);
6226
6227 /* make val_end point to the first white space or delimitor after the value */
6228 val_end = next;
6229 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6230 val_end--;
6231 } else {
6232 val_beg = val_end = next = equal;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6233 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6234
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6235 /* We have nothing to do with attributes beginning with '$'. However,
6236 * they will automatically be removed if a header before them is removed,
6237 * since they're supposed to be linked together.
6238 */
6239 if (*att_beg == '$')
6240 continue;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6241
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6242 /* Ignore cookies with no equal sign */
6243 if (equal == next) {
6244 /* This is not our cookie, so we must preserve it. But if we already
6245 * scheduled another cookie for removal, we cannot remove the
6246 * complete header, but we can remove the previous block itself.
6247 */
6248 preserve_hdr = 1;
6249 if (del_from != NULL) {
6250 int delta = del_hdr_value(req, &del_from, prev);
6251 val_end += delta;
6252 next += delta;
6253 hdr_end += delta;
6254 hdr_next += delta;
6255 cur_hdr->len += delta;
6256 http_msg_move_end(&txn->req, delta);
6257 prev = del_from;
6258 del_from = NULL;
6259 }
6260 continue;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6261 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6262
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6263 /* if there are spaces around the equal sign, we need to
6264 * strip them otherwise we'll get trouble for cookie captures,
6265 * or even for rewrites. Since this happens extremely rarely,
6266 * it does not hurt performance.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6267 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6268 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6269 int stripped_before = 0;
6270 int stripped_after = 0;
6271
6272 if (att_end != equal) {
6273 stripped_before = buffer_replace2(req, att_end, equal, NULL, 0);
6274 equal += stripped_before;
6275 val_beg += stripped_before;
6276 }
6277
6278 if (val_beg > equal + 1) {
6279 stripped_after = buffer_replace2(req, equal + 1, val_beg, NULL, 0);
6280 val_beg += stripped_after;
6281 stripped_before += stripped_after;
6282 }
6283
6284 val_end += stripped_before;
6285 next += stripped_before;
6286 hdr_end += stripped_before;
6287 hdr_next += stripped_before;
6288 cur_hdr->len += stripped_before;
6289 http_msg_move_end(&txn->req, stripped_before);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6290 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6291 /* now everything is as on the diagram above */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6292
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6293 /* First, let's see if we want to capture this cookie. We check
6294 * that we don't already have a client side cookie, because we
6295 * can only capture one. Also as an optimisation, we ignore
6296 * cookies shorter than the declared name.
6297 */
6298 if (t->fe->capture_name != NULL && txn->cli_cookie == NULL &&
6299 (val_end - att_beg >= t->fe->capture_namelen) &&
6300 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6301 int log_len = val_end - att_beg;
6302
6303 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
6304 Alert("HTTP logging : out of memory.\n");
6305 } else {
6306 if (log_len > t->fe->capture_len)
6307 log_len = t->fe->capture_len;
6308 memcpy(txn->cli_cookie, att_beg, log_len);
6309 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6310 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6311 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6312
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6313 /* Persistence cookies in passive, rewrite or insert mode have the
6314 * following form :
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6315 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6316 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6317 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6318 * For cookies in prefix mode, the form is :
6319 *
6320 * Cookie: NAME=SRV~VALUE
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6321 */
6322 if ((att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6323 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
6324 struct server *srv = t->be->srv;
6325 char *delim;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6326
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6327 /* if we're in cookie prefix mode, we'll search the delimitor so that we
6328 * have the server ID between val_beg and delim, and the original cookie between
6329 * delim+1 and val_end. Otherwise, delim==val_end :
6330 *
6331 * Cookie: NAME=SRV; # in all but prefix modes
6332 * Cookie: NAME=SRV~OPAQUE ; # in prefix mode
6333 * | || || | |+-> next
6334 * | || || | +--> val_end
6335 * | || || +---------> delim
6336 * | || |+------------> val_beg
6337 * | || +-------------> att_end = equal
6338 * | |+-----------------> att_beg
6339 * | +------------------> prev
6340 * +-------------------------> hdr_beg
6341 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6342
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6343 if (t->be->options & PR_O_COOK_PFX) {
6344 for (delim = val_beg; delim < val_end; delim++)
6345 if (*delim == COOKIE_DELIM)
6346 break;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6347 } else {
6348 char *vbar1;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6349 delim = val_end;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6350 /* Now check if the cookie contains a date field, which would
6351 * appear after a vertical bar ('|') just after the server name
6352 * and before the delimiter.
6353 */
6354 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
6355 if (vbar1) {
6356 /* OK, so left of the bar is the server's cookie and
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6357 * right is the last seen date. It is a base64 encoded
6358 * 30-bit value representing the UNIX date since the
6359 * epoch in 4-second quantities.
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6360 */
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6361 int val;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6362 delim = vbar1++;
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6363 if (val_end - vbar1 >= 5) {
6364 val = b64tos30(vbar1);
6365 if (val > 0)
6366 txn->cookie_last_date = val << 2;
6367 }
6368 /* look for a second vertical bar */
6369 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
6370 if (vbar1 && (val_end - vbar1 > 5)) {
6371 val = b64tos30(vbar1 + 1);
6372 if (val > 0)
6373 txn->cookie_first_date = val << 2;
6374 }
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6375 }
6376 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6377
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6378 /* if the cookie has an expiration date and the proxy wants to check
6379 * it, then we do that now. We first check if the cookie is too old,
6380 * then only if it has expired. We detect strict overflow because the
6381 * time resolution here is not great (4 seconds). Cookies with dates
6382 * in the future are ignored if their offset is beyond one day. This
6383 * allows an admin to fix timezone issues without expiring everyone
6384 * and at the same time avoids keeping unwanted side effects for too
6385 * long.
6386 */
6387 if (txn->cookie_first_date && t->be->cookie_maxlife &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6388 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)t->be->cookie_maxlife) ||
6389 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6390 txn->flags &= ~TX_CK_MASK;
6391 txn->flags |= TX_CK_OLD;
6392 delim = val_beg; // let's pretend we have not found the cookie
6393 txn->cookie_first_date = 0;
6394 txn->cookie_last_date = 0;
6395 }
6396 else if (txn->cookie_last_date && t->be->cookie_maxidle &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6397 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)t->be->cookie_maxidle) ||
6398 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6399 txn->flags &= ~TX_CK_MASK;
6400 txn->flags |= TX_CK_EXPIRED;
6401 delim = val_beg; // let's pretend we have not found the cookie
6402 txn->cookie_first_date = 0;
6403 txn->cookie_last_date = 0;
6404 }
6405
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6406 /* Here, we'll look for the first running server which supports the cookie.
6407 * This allows to share a same cookie between several servers, for example
6408 * to dedicate backup servers to specific servers only.
6409 * However, to prevent clients from sticking to cookie-less backup server
6410 * when they have incidentely learned an empty cookie, we simply ignore
6411 * empty cookies and mark them as invalid.
6412 * The same behaviour is applied when persistence must be ignored.
6413 */
6414 if ((delim == val_beg) || (t->flags & SN_IGNORE_PRST))
6415 srv = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6416
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6417 while (srv) {
6418 if (srv->cookie && (srv->cklen == delim - val_beg) &&
6419 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
6420 if ((srv->state & SRV_RUNNING) ||
6421 (t->be->options & PR_O_PERSIST) ||
6422 (t->flags & SN_FORCE_PRST)) {
6423 /* we found the server and we can use it */
6424 txn->flags &= ~TX_CK_MASK;
6425 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
6426 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]6427 set_target_server(&t->target, srv);
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6428 break;
6429 } else {
6430 /* we found a server, but it's down,
6431 * mark it as such and go on in case
6432 * another one is available.
6433 */
6434 txn->flags &= ~TX_CK_MASK;
6435 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6436 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6437 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6438 srv = srv->next;
6439 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6440
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6441 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6442 /* no server matched this cookie */
6443 txn->flags &= ~TX_CK_MASK;
6444 txn->flags |= TX_CK_INVALID;
6445 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6446
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6447 /* depending on the cookie mode, we may have to either :
6448 * - delete the complete cookie if we're in insert+indirect mode, so that
6449 * the server never sees it ;
6450 * - remove the server id from the cookie value, and tag the cookie as an
6451 * application cookie so that it does not get accidentely removed later,
6452 * if we're in cookie prefix mode
6453 */
6454 if ((t->be->options & PR_O_COOK_PFX) && (delim != val_end)) {
6455 int delta; /* negative */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6456
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6457 delta = buffer_replace2(req, val_beg, delim + 1, NULL, 0);
6458 val_end += delta;
6459 next += delta;
6460 hdr_end += delta;
6461 hdr_next += delta;
6462 cur_hdr->len += delta;
6463 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6464
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6465 del_from = NULL;
6466 preserve_hdr = 1; /* we want to keep this cookie */
6467 }
6468 else if (del_from == NULL &&
6469 (t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) {
6470 del_from = prev;
6471 }
6472 } else {
6473 /* This is not our cookie, so we must preserve it. But if we already
6474 * scheduled another cookie for removal, we cannot remove the
6475 * complete header, but we can remove the previous block itself.
6476 */
6477 preserve_hdr = 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6478
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6479 if (del_from != NULL) {
6480 int delta = del_hdr_value(req, &del_from, prev);
Willy Tarreaub8105542010-11-24 18:31:28 +0100[diff] [blame]6481 if (att_beg >= del_from)
6482 att_beg += delta;
6483 if (att_end >= del_from)
6484 att_end += delta;
6485 val_beg += delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6486 val_end += delta;
6487 next += delta;
6488 hdr_end += delta;
6489 hdr_next += delta;
6490 cur_hdr->len += delta;
6491 http_msg_move_end(&txn->req, delta);
6492 prev = del_from;
6493 del_from = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6494 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6495 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6496
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6497 /* Look for the appsession cookie unless persistence must be ignored */
6498 if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
6499 int cmp_len, value_len;
6500 char *value_begin;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]6501
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6502 if (t->be->options2 & PR_O2_AS_PFX) {
6503 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6504 value_begin = att_beg + t->be->appsession_name_len;
6505 value_len = val_end - att_beg - t->be->appsession_name_len;
6506 } else {
6507 cmp_len = att_end - att_beg;
6508 value_begin = val_beg;
6509 value_len = val_end - val_beg;
6510 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6511
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6512 /* let's see if the cookie is our appcookie */
6513 if (cmp_len == t->be->appsession_name_len &&
6514 memcmp(att_beg, t->be->appsession_name, cmp_len) == 0) {
6515 manage_client_side_appsession(t, value_begin, value_len);
6516 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6517 }
6518
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6519 /* continue with next cookie on this header line */
6520 att_beg = next;
6521 } /* for each cookie */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6522
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6523 /* There are no more cookies on this line.
6524 * We may still have one (or several) marked for deletion at the
6525 * end of the line. We must do this now in two ways :
6526 * - if some cookies must be preserved, we only delete from the
6527 * mark to the end of line ;
6528 * - if nothing needs to be preserved, simply delete the whole header
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6529 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6530 if (del_from) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6531 int delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6532 if (preserve_hdr) {
6533 delta = del_hdr_value(req, &del_from, hdr_end);
6534 hdr_end = del_from;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6535 cur_hdr->len += delta;
6536 } else {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6537 delta = buffer_replace2(req, hdr_beg, hdr_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6538
6539 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6540 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6541 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6542 cur_hdr->len = 0;
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]6543 cur_idx = old_idx;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6544 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6545 hdr_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6546 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6547 }
6548
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6549 /* check next header */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6550 old_idx = cur_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6551 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6552}
6553
6554
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6555/* Iterate the same filter through all response headers contained in <rtr>.
6556 * Returns 1 if this filter can be stopped upon return, otherwise 0.
6557 */
6558int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6559{
6560 char term;
6561 char *cur_ptr, *cur_end, *cur_next;
6562 int cur_idx, old_idx, last_hdr;
6563 struct http_txn *txn = &t->txn;
6564 struct hdr_idx_elem *cur_hdr;
6565 int len, delta;
6566
6567 last_hdr = 0;
6568
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6569 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6570 old_idx = 0;
6571
6572 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6573 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6574 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6575 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6576 (exp->action == ACT_ALLOW ||
6577 exp->action == ACT_DENY))
6578 return 0;
6579
6580 cur_idx = txn->hdr_idx.v[old_idx].next;
6581 if (!cur_idx)
6582 break;
6583
6584 cur_hdr = &txn->hdr_idx.v[cur_idx];
6585 cur_ptr = cur_next;
6586 cur_end = cur_ptr + cur_hdr->len;
6587 cur_next = cur_end + cur_hdr->cr + 1;
6588
6589 /* Now we have one header between cur_ptr and cur_end,
6590 * and the next header starts at cur_next.
6591 */
6592
6593 /* The annoying part is that pattern matching needs
6594 * that we modify the contents to null-terminate all
6595 * strings before testing them.
6596 */
6597
6598 term = *cur_end;
6599 *cur_end = '\0';
6600
6601 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6602 switch (exp->action) {
6603 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6604 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6605 last_hdr = 1;
6606 break;
6607
6608 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6609 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6610 last_hdr = 1;
6611 break;
6612
6613 case ACT_REPLACE:
6614 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6615 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6616 /* FIXME: if the user adds a newline in the replacement, the
6617 * index will not be recalculated for now, and the new line
6618 * will not be counted as a new header.
6619 */
6620
6621 cur_end += delta;
6622 cur_next += delta;
6623 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6624 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6625 break;
6626
6627 case ACT_REMOVE:
6628 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
6629 cur_next += delta;
6630
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6631 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6632 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6633 txn->hdr_idx.used--;
6634 cur_hdr->len = 0;
6635 cur_end = NULL; /* null-term has been rewritten */
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]6636 cur_idx = old_idx;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6637 break;
6638
6639 }
6640 }
6641 if (cur_end)
6642 *cur_end = term; /* restore the string terminator */
6643
6644 /* keep the link from this header to next one in case of later
6645 * removal of next header.
6646 */
6647 old_idx = cur_idx;
6648 }
6649 return 0;
6650}
6651
6652
6653/* Apply the filter to the status line in the response buffer <rtr>.
6654 * Returns 0 if nothing has been done, 1 if the filter has been applied,
6655 * or -1 if a replacement resulted in an invalid status line.
6656 */
6657int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6658{
6659 char term;
6660 char *cur_ptr, *cur_end;
6661 int done;
6662 struct http_txn *txn = &t->txn;
6663 int len, delta;
6664
6665
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6666 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6667 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6668 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6669 (exp->action == ACT_ALLOW ||
6670 exp->action == ACT_DENY))
6671 return 0;
6672 else if (exp->action == ACT_REMOVE)
6673 return 0;
6674
6675 done = 0;
6676
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6677 cur_ptr = txn->rsp.sol;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]6678 cur_end = cur_ptr + txn->rsp.sl.st.l;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6679
6680 /* Now we have the status line between cur_ptr and cur_end */
6681
6682 /* The annoying part is that pattern matching needs
6683 * that we modify the contents to null-terminate all
6684 * strings before testing them.
6685 */
6686
6687 term = *cur_end;
6688 *cur_end = '\0';
6689
6690 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6691 switch (exp->action) {
6692 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6693 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6694 done = 1;
6695 break;
6696
6697 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6698 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6699 done = 1;
6700 break;
6701
6702 case ACT_REPLACE:
6703 *cur_end = term; /* restore the string terminator */
6704 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6705 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6706 /* FIXME: if the user adds a newline in the replacement, the
6707 * index will not be recalculated for now, and the new line
6708 * will not be counted as a new header.
6709 */
6710
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6711 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6712 cur_end += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6713 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]6714 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6715 cur_ptr, cur_end + 1,
6716 NULL, NULL);
6717 if (unlikely(!cur_end))
6718 return -1;
6719
6720 /* we have a full respnse and we know that we have either a CR
6721 * or an LF at <ptr>.
6722 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6723 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]6724 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]6725 /* there is no point trying this regex on headers */
6726 return 1;
6727 }
6728 }
6729 *cur_end = term; /* restore the string terminator */
6730 return done;
6731}
6732
6733
6734
6735/*
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6736 * 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]6737 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
6738 * unparsable response.
6739 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6740int apply_filters_to_response(struct session *s, struct buffer *rtr, struct proxy *px)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6741{
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6742 struct http_txn *txn = &s->txn;
6743 struct hdr_exp *exp;
6744
6745 for (exp = px->rsp_exp; exp; exp = exp->next) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6746 int ret;
6747
6748 /*
6749 * The interleaving of transformations and verdicts
6750 * makes it difficult to decide to continue or stop
6751 * the evaluation.
6752 */
6753
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6754 if (txn->flags & TX_SVDENY)
6755 break;
6756
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6757 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6758 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
6759 exp->action == ACT_PASS)) {
6760 exp = exp->next;
6761 continue;
6762 }
6763
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6764 /* if this filter had a condition, evaluate it now and skip to
6765 * next filter if the condition does not match.
6766 */
6767 if (exp->cond) {
6768 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_RTR);
6769 ret = acl_pass(ret);
6770 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
6771 ret = !ret;
6772 if (!ret)
6773 continue;
6774 }
6775
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6776 /* Apply the filter to the status line. */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6777 ret = apply_filter_to_sts_line(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6778 if (unlikely(ret < 0))
6779 return -1;
6780
6781 if (likely(ret == 0)) {
6782 /* The filter did not match the response, it can be
6783 * iterated through all headers.
6784 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6785 apply_filter_to_resp_headers(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6786 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6787 }
6788 return 0;
6789}
6790
6791
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6792/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6793 * Manage server-side cookies. It can impact performance by about 2% so it is
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6794 * desirable to call it only when needed. This function is also used when we
6795 * just need to know if there is a cookie (eg: for check-cache).
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6796 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6797void manage_server_side_cookies(struct session *t, struct buffer *res)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6798{
6799 struct http_txn *txn = &t->txn;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]6800 struct server *srv;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6801 int is_cookie2;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6802 int cur_idx, old_idx, delta;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6803 char *hdr_beg, *hdr_end, *hdr_next;
6804 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6805
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6806 /* Iterate through the headers.
6807 * we start with the start line.
6808 */
6809 old_idx = 0;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6810 hdr_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6811
6812 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
6813 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6814 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6815
6816 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6817 hdr_beg = hdr_next;
6818 hdr_end = hdr_beg + cur_hdr->len;
6819 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6820
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6821 /* We have one full header between hdr_beg and hdr_end, and the
6822 * next header starts at hdr_next. We're only interested in
6823 * "Set-Cookie" and "Set-Cookie2" headers.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6824 */
6825
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6826 is_cookie2 = 0;
6827 prev = hdr_beg + 10;
6828 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie", 10);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6829 if (!val) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6830 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie2", 11);
6831 if (!val) {
6832 old_idx = cur_idx;
6833 continue;
6834 }
6835 is_cookie2 = 1;
6836 prev = hdr_beg + 11;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6837 }
6838
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6839 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
6840 * <prev> points to the colon.
6841 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6842 txn->flags |= TX_SCK_PRESENT;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6843
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6844 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
6845 * check-cache is enabled) and we are not interested in checking
6846 * them. Warning, the cookie capture is declared in the frontend.
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6847 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6848 if (t->be->cookie_name == NULL &&
6849 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6850 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6851 return;
6852
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6853 /* OK so now we know we have to process this response cookie.
6854 * The format of the Set-Cookie header is slightly different
6855 * from the format of the Cookie header in that it does not
6856 * support the comma as a cookie delimiter (thus the header
6857 * cannot be folded) because the Expires attribute described in
6858 * the original Netscape's spec may contain an unquoted date
6859 * with a comma inside. We have to live with this because
6860 * many browsers don't support Max-Age and some browsers don't
6861 * support quoted strings. However the Set-Cookie2 header is
6862 * clean.
6863 *
6864 * We have to keep multiple pointers in order to support cookie
6865 * removal at the beginning, middle or end of header without
6866 * corrupting the header (in case of set-cookie2). A special
6867 * pointer, <scav> points to the beginning of the set-cookie-av
6868 * fields after the first semi-colon. The <next> pointer points
6869 * either to the end of line (set-cookie) or next unquoted comma
6870 * (set-cookie2). All of these headers are valid :
6871 *
6872 * Set-Cookie: NAME1 = VALUE 1 ; Secure; Path="/"\r\n
6873 * Set-Cookie:NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6874 * Set-Cookie: NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6875 * Set-Cookie2: NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard\r\n
6876 * | | | | | | | | | |
6877 * | | | | | | | | +-> next hdr_end <--+
6878 * | | | | | | | +------------> scav
6879 * | | | | | | +--------------> val_end
6880 * | | | | | +--------------------> val_beg
6881 * | | | | +----------------------> equal
6882 * | | | +------------------------> att_end
6883 * | | +----------------------------> att_beg
6884 * | +------------------------------> prev
6885 * +-----------------------------------------> hdr_beg
6886 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6887
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6888 for (; prev < hdr_end; prev = next) {
6889 /* Iterate through all cookies on this line */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6890
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6891 /* find att_beg */
6892 att_beg = prev + 1;
6893 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6894 att_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6895
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6896 /* find att_end : this is the first character after the last non
6897 * space before the equal. It may be equal to hdr_end.
6898 */
6899 equal = att_end = att_beg;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6900
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6901 while (equal < hdr_end) {
6902 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
6903 break;
6904 if (http_is_spht[(unsigned char)*equal++])
6905 continue;
6906 att_end = equal;
6907 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6908
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6909 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6910 * is between <att_beg> and <equal>, both may be identical.
6911 */
6912
6913 /* look for end of cookie if there is an equal sign */
6914 if (equal < hdr_end && *equal == '=') {
6915 /* look for the beginning of the value */
6916 val_beg = equal + 1;
6917 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6918 val_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6919
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6920 /* find the end of the value, respecting quotes */
6921 next = find_cookie_value_end(val_beg, hdr_end);
6922
6923 /* make val_end point to the first white space or delimitor after the value */
6924 val_end = next;
6925 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6926 val_end--;
6927 } else {
6928 /* <equal> points to next comma, semi-colon or EOL */
6929 val_beg = val_end = next = equal;
6930 }
6931
6932 if (next < hdr_end) {
6933 /* Set-Cookie2 supports multiple cookies, and <next> points to
6934 * a colon or semi-colon before the end. So skip all attr-value
6935 * pairs and look for the next comma. For Set-Cookie, since
6936 * commas are permitted in values, skip to the end.
6937 */
6938 if (is_cookie2)
6939 next = find_hdr_value_end(next, hdr_end);
6940 else
6941 next = hdr_end;
6942 }
6943
6944 /* Now everything is as on the diagram above */
6945
6946 /* Ignore cookies with no equal sign */
6947 if (equal == val_end)
6948 continue;
6949
6950 /* If there are spaces around the equal sign, we need to
6951 * strip them otherwise we'll get trouble for cookie captures,
6952 * or even for rewrites. Since this happens extremely rarely,
6953 * it does not hurt performance.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6954 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6955 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6956 int stripped_before = 0;
6957 int stripped_after = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6958
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6959 if (att_end != equal) {
6960 stripped_before = buffer_replace2(res, att_end, equal, NULL, 0);
6961 equal += stripped_before;
6962 val_beg += stripped_before;
6963 }
6964
6965 if (val_beg > equal + 1) {
6966 stripped_after = buffer_replace2(res, equal + 1, val_beg, NULL, 0);
6967 val_beg += stripped_after;
6968 stripped_before += stripped_after;
6969 }
6970
6971 val_end += stripped_before;
6972 next += stripped_before;
6973 hdr_end += stripped_before;
6974 hdr_next += stripped_before;
6975 cur_hdr->len += stripped_before;
Willy Tarreau1fc1f452011-04-07 22:35:37 +0200[diff] [blame]6976 http_msg_move_end(&txn->rsp, stripped_before);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6977 }
6978
6979 /* First, let's see if we want to capture this cookie. We check
6980 * that we don't already have a server side cookie, because we
6981 * can only capture one. Also as an optimisation, we ignore
6982 * cookies shorter than the declared name.
6983 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6984 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6985 txn->srv_cookie == NULL &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6986 (val_end - att_beg >= t->fe->capture_namelen) &&
6987 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6988 int log_len = val_end - att_beg;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]6989 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6990 Alert("HTTP logging : out of memory.\n");
6991 }
Willy Tarreauf70fc752010-11-19 11:27:18 +0100[diff] [blame]6992 else {
6993 if (log_len > t->fe->capture_len)
6994 log_len = t->fe->capture_len;
6995 memcpy(txn->srv_cookie, att_beg, log_len);
6996 txn->srv_cookie[log_len] = 0;
6997 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6998 }
6999
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7000 srv = target_srv(&t->target);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7001 /* now check if we need to process it for persistence */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7002 if (!(t->flags & SN_IGNORE_PRST) &&
7003 (att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
7004 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7005 /* assume passive cookie by default */
7006 txn->flags &= ~TX_SCK_MASK;
7007 txn->flags |= TX_SCK_FOUND;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7008
7009 /* If the cookie is in insert mode on a known server, we'll delete
7010 * this occurrence because we'll insert another one later.
7011 * 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]7012 * a direct access.
7013 */
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]7014 if (t->be->options2 & PR_O2_COOK_PSV) {
7015 /* The "preserve" flag was set, we don't want to touch the
7016 * server's cookie.
7017 */
7018 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7019 else if ((srv && (t->be->options & PR_O_COOK_INS)) ||
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]7020 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7021 /* this cookie must be deleted */
7022 if (*prev == ':' && next == hdr_end) {
7023 /* whole header */
7024 delta = buffer_replace2(res, hdr_beg, hdr_next, NULL, 0);
7025 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
7026 txn->hdr_idx.used--;
7027 cur_hdr->len = 0;
Willy Tarreau26db59e2010-11-28 06:57:24 +0100[diff] [blame]7028 cur_idx = old_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7029 hdr_next += delta;
7030 http_msg_move_end(&txn->rsp, delta);
7031 /* note: while both invalid now, <next> and <hdr_end>
7032 * are still equal, so the for() will stop as expected.
7033 */
7034 } else {
7035 /* just remove the value */
7036 int delta = del_hdr_value(res, &prev, next);
7037 next = prev;
7038 hdr_end += delta;
7039 hdr_next += delta;
7040 cur_hdr->len += delta;
7041 http_msg_move_end(&txn->rsp, delta);
7042 }
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7043 txn->flags &= ~TX_SCK_MASK;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7044 txn->flags |= TX_SCK_DELETED;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7045 /* and go on with next cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7046 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7047 else if (srv && srv->cookie && (t->be->options & PR_O_COOK_RW)) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7048 /* replace bytes val_beg->val_end with the cookie name associated
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7049 * with this server since we know it.
7050 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7051 delta = buffer_replace2(res, val_beg, val_end, srv->cookie, srv->cklen);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7052 next += delta;
7053 hdr_end += delta;
7054 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7055 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]7056 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7057
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7058 txn->flags &= ~TX_SCK_MASK;
7059 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7060 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7061 else if (srv && srv && (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7062 /* insert the cookie name associated with this server
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7063 * before existing cookie, and insert a delimiter between them..
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7064 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7065 delta = buffer_replace2(res, val_beg, val_beg, srv->cookie, srv->cklen + 1);
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7066 next += delta;
7067 hdr_end += delta;
7068 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7069 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]7070 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7071
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7072 val_beg[srv->cklen] = COOKIE_DELIM;
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]7073 txn->flags &= ~TX_SCK_MASK;
7074 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7075 }
7076 }
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]7077 /* next, let's see if the cookie is our appcookie, unless persistence must be ignored */
7078 else if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7079 int cmp_len, value_len;
7080 char *value_begin;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7081
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7082 if (t->be->options2 & PR_O2_AS_PFX) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7083 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
7084 value_begin = att_beg + t->be->appsession_name_len;
7085 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]7086 } else {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7087 cmp_len = att_end - att_beg;
7088 value_begin = val_beg;
7089 value_len = MIN(t->be->appsession_len, val_end - val_beg);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7090 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7091
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]7092 if ((cmp_len == t->be->appsession_name_len) &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7093 (memcmp(att_beg, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
7094 /* free a possibly previously allocated memory */
7095 pool_free2(apools.sessid, txn->sessid);
7096
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7097 /* Store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7098 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7099 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
7100 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
7101 return;
7102 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7103 memcpy(txn->sessid, value_begin, value_len);
7104 txn->sessid[value_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7105 }
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7106 }
7107 /* that's done for this cookie, check the next one on the same
7108 * line when next != hdr_end (only if is_cookie2).
7109 */
7110 }
7111 /* check next header */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7112 old_idx = cur_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]7113 }
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7114
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7115 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7116 appsess *asession = NULL;
7117 /* only do insert, if lookup fails */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7118 asession = appsession_hash_lookup(&(t->be->htbl_proxy), txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7119 if (asession == NULL) {
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]7120 size_t server_id_len;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7121 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
7122 Alert("Not enough Memory process_srv():asession:calloc().\n");
7123 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
7124 return;
7125 }
Willy Tarreau77eb9b82010-11-19 11:29:06 +0100[diff] [blame]7126 asession->serverid = NULL; /* to avoid a double free in case of allocation error */
7127
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7128 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
7129 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
7130 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]7131 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7132 return;
7133 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7134 memcpy(asession->sessid, txn->sessid, t->be->appsession_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7135 asession->sessid[t->be->appsession_len] = 0;
7136
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7137 server_id_len = strlen(target_srv(&t->target)->id) + 1;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7138 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
Willy Tarreau77eb9b82010-11-19 11:29:06 +0100[diff] [blame]7139 Alert("Not enough Memory process_srv():asession->serverid:malloc().\n");
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7140 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]7141 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7142 return;
7143 }
7144 asession->serverid[0] = '\0';
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7145 memcpy(asession->serverid, target_srv(&t->target)->id, server_id_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]7146
7147 asession->request_count = 0;
7148 appsession_hash_insert(&(t->be->htbl_proxy), asession);
7149 }
7150
7151 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
7152 asession->request_count++;
7153 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7154}
7155
7156
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7157/*
7158 * Check if response is cacheable or not. Updates t->flags.
7159 */
7160void check_response_for_cacheability(struct session *t, struct buffer *rtr)
7161{
7162 struct http_txn *txn = &t->txn;
7163 char *p1, *p2;
7164
7165 char *cur_ptr, *cur_end, *cur_next;
7166 int cur_idx;
7167
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]7168 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7169 return;
7170
7171 /* Iterate through the headers.
7172 * we start with the start line.
7173 */
7174 cur_idx = 0;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7175 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7176
7177 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
7178 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7179 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7180
7181 cur_hdr = &txn->hdr_idx.v[cur_idx];
7182 cur_ptr = cur_next;
7183 cur_end = cur_ptr + cur_hdr->len;
7184 cur_next = cur_end + cur_hdr->cr + 1;
7185
7186 /* We have one full header between cur_ptr and cur_end, and the
7187 * next header starts at cur_next. We're only interested in
7188 * "Cookie:" headers.
7189 */
7190
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7191 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
7192 if (val) {
7193 if ((cur_end - (cur_ptr + val) >= 8) &&
7194 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
7195 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
7196 return;
7197 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7198 }
7199
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7200 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
7201 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7202 continue;
7203
7204 /* OK, right now we know we have a cache-control header at cur_ptr */
7205
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]7206 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7207
7208 if (p1 >= cur_end) /* no more info */
7209 continue;
7210
7211 /* p1 is at the beginning of the value */
7212 p2 = p1;
7213
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]7214 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7215 p2++;
7216
7217 /* we have a complete value between p1 and p2 */
7218 if (p2 < cur_end && *p2 == '=') {
7219 /* we have something of the form no-cache="set-cookie" */
7220 if ((cur_end - p1 >= 21) &&
7221 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
7222 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7223 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7224 continue;
7225 }
7226
7227 /* OK, so we know that either p2 points to the end of string or to a comma */
7228 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
7229 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
7230 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
7231 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7232 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7233 return;
7234 }
7235
7236 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7237 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7238 continue;
7239 }
7240 }
7241}
7242
7243
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7244/*
7245 * Try to retrieve a known appsession in the URI, then the associated server.
7246 * If the server is found, it's assigned to the session.
7247 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7248void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7249{
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7250 char *end_params, *first_param, *cur_param, *next_param;
7251 char separator;
7252 int value_len;
7253
7254 int mode = t->be->options2 & PR_O2_AS_M_ANY;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7255
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]7256 if (t->be->appsession_name == NULL ||
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]7257 (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]7258 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7259 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7260
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7261 first_param = NULL;
7262 switch (mode) {
7263 case PR_O2_AS_M_PP:
7264 first_param = memchr(begin, ';', len);
7265 break;
7266 case PR_O2_AS_M_QS:
7267 first_param = memchr(begin, '?', len);
7268 break;
7269 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7270
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7271 if (first_param == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7272 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7273 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7274
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7275 switch (mode) {
7276 case PR_O2_AS_M_PP:
7277 if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) {
7278 end_params = (char *) begin + len;
7279 }
7280 separator = ';';
7281 break;
7282 case PR_O2_AS_M_QS:
7283 end_params = (char *) begin + len;
7284 separator = '&';
7285 break;
7286 default:
7287 /* unknown mode, shouldn't happen */
7288 return;
7289 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7290
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7291 cur_param = next_param = end_params;
7292 while (cur_param > first_param) {
7293 cur_param--;
7294 if ((cur_param[0] == separator) || (cur_param == first_param)) {
7295 /* let's see if this is the appsession parameter */
7296 if ((cur_param + t->be->appsession_name_len + 1 < next_param) &&
7297 ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') &&
7298 (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
7299 /* Cool... it's the right one */
7300 cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2);
7301 value_len = MIN(t->be->appsession_len, next_param - cur_param);
7302 if (value_len > 0) {
7303 manage_client_side_appsession(t, cur_param, value_len);
7304 }
7305 break;
7306 }
7307 next_param = cur_param;
7308 }
7309 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7310#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]7311 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]7312 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7313#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7314}
7315
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7316/*
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7317 * 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]7318 * for the current backend.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7319 *
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7320 * 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]7321 * uri_auth field is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7322 *
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7323 * Returns 1 if stats should be provided, otherwise 0.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7324 */
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7325int stats_check_uri(struct stream_interface *si, struct http_txn *txn, struct proxy *backend)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7326{
7327 struct uri_auth *uri_auth = backend->uri_auth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7328 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7329
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7330 if (!uri_auth)
7331 return 0;
7332
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7333 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]7334 return 0;
7335
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7336 memset(&si->applet.ctx.stats, 0, sizeof(si->applet.ctx.stats));
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7337
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7338 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]7339 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7340 return 0;
7341
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7342 h = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7343
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]7344 /* the URI is in h */
7345 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7346 return 0;
7347
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7348 h += uri_auth->uri_len;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7349 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]7350 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7351 si->applet.ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7352 break;
7353 }
7354 h++;
7355 }
7356
7357 if (uri_auth->refresh) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7358 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7359 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]7360 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7361 si->applet.ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7362 break;
7363 }
7364 h++;
7365 }
7366 }
7367
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7368 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7369 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]7370 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7371 si->applet.ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]7372 break;
7373 }
7374 h++;
7375 }
7376
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7377 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7378 while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 8) {
7379 if (memcmp(h, ";st=", 4) == 0) {
7380 h += 4;
7381
7382 if (memcmp(h, STAT_STATUS_DONE, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7383 si->applet.ctx.stats.st_code = STAT_STATUS_DONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7384 else if (memcmp(h, STAT_STATUS_NONE, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7385 si->applet.ctx.stats.st_code = STAT_STATUS_NONE;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7386 else if (memcmp(h, STAT_STATUS_EXCD, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7387 si->applet.ctx.stats.st_code = STAT_STATUS_EXCD;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]7388 else if (memcmp(h, STAT_STATUS_DENY, 4) == 0)
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7389 si->applet.ctx.stats.st_code = STAT_STATUS_DENY;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7390 else
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7391 si->applet.ctx.stats.st_code = STAT_STATUS_UNKN;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7392 break;
7393 }
7394 h++;
7395 }
7396
Willy Tarreau295a8372011-03-10 11:25:07 +0100[diff] [blame]7397 si->applet.ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7398
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7399 return 1;
7400}
7401
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7402/*
7403 * Capture a bad request or response and archive it in the proxy's structure.
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7404 * WARNING: it's unlikely that we've reached HTTP_MSG_BODY here so we must not
7405 * assume that msg->sol = buf->data + msg->som.
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7406 */
7407void http_capture_bad_message(struct error_snapshot *es, struct session *s,
7408 struct buffer *buf, struct http_msg *msg,
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]7409 int state, struct proxy *other_end)
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7410{
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7411 if (buf->r <= (buf->data + msg->som)) { /* message wraps */
7412 int len1 = buf->size - msg->som;
7413 es->len = buf->r - (buf->data + msg->som) + buf->size;
7414 memcpy(es->buf, buf->data + msg->som, MIN(len1, sizeof(es->buf)));
7415 if (es->len > len1 && len1 < sizeof(es->buf))
7416 memcpy(es->buf, buf->data, MIN(es->len, sizeof(es->buf)) - len1);
7417 }
7418 else {
7419 es->len = buf->r - (buf->data + msg->som);
7420 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
7421 }
7422
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7423 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]7424 es->pos = msg->err_pos - msg->som;
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7425 else if (buf->lr >= (buf->data + msg->som))
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]7426 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau81f2fb92010-12-12 13:09:08 +0100[diff] [blame]7427 else
7428 es->pos = buf->lr - (buf->data + msg->som) + buf->size;
7429
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7430 es->when = date; // user-visible date
7431 es->sid = s->uniq_id;
Willy Tarreau827aee92011-03-10 16:55:02 +0100[diff] [blame]7432 es->srv = target_srv(&s->target);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7433 es->oe = other_end;
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]7434 es->src = s->req->prod->addr.c.from;
Willy Tarreau078272e2010-12-12 12:46:33 +0100[diff] [blame]7435 es->state = state;
7436 es->flags = buf->flags;
Willy Tarreau10479e42010-12-12 14:00:34 +0100[diff] [blame]7437 es->ev_id = error_snapshot_id++;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7438}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7439
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7440/* return the IP address pointed to by occurrence <occ> of header <hname> in
7441 * HTTP message <msg> indexed in <idx>. If <occ> is strictly positive, the
7442 * occurrence number corresponding to this value is returned. If <occ> is
7443 * strictly negative, the occurrence number before the end corresponding to
7444 * this value is returned. If <occ> is null, any value is returned, so it is
7445 * not recommended to use it that way. Negative occurrences are limited to
7446 * a small value because it is required to keep them in memory while scanning.
7447 * IP address 0.0.0.0 is returned if no match is found.
7448 */
7449unsigned int get_ip_from_hdr2(struct http_msg *msg, const char *hname, int hlen, struct hdr_idx *idx, int occ)
7450{
7451 struct hdr_ctx ctx;
7452 unsigned int hdr_hist[MAX_HDR_HISTORY];
7453 unsigned int hist_ptr;
7454 int found = 0;
7455
7456 ctx.idx = 0;
7457 if (occ >= 0) {
7458 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
7459 occ--;
7460 if (occ <= 0) {
7461 found = 1;
7462 break;
7463 }
7464 }
7465 if (!found)
7466 return 0;
7467 return inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
7468 }
7469
7470 /* negative occurrence, we scan all the list then walk back */
7471 if (-occ > MAX_HDR_HISTORY)
7472 return 0;
7473
7474 hist_ptr = 0;
7475 hdr_hist[hist_ptr] = 0;
7476 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
7477 hdr_hist[hist_ptr++] = inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
7478 if (hist_ptr >= MAX_HDR_HISTORY)
7479 hist_ptr = 0;
7480 found++;
7481 }
7482 if (-occ > found)
7483 return 0;
7484 /* OK now we have the last occurrence in [hist_ptr-1], and we need to
7485 * find occurrence -occ, so we have to check [hist_ptr+occ].
7486 */
7487 hist_ptr += occ;
7488 if (hist_ptr >= MAX_HDR_HISTORY)
7489 hist_ptr -= MAX_HDR_HISTORY;
7490 return hdr_hist[hist_ptr];
7491}
7492
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]7493/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7494 * Print a debug line with a header
7495 */
7496void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
7497{
7498 int len, max;
7499 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]7500 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7501 max = end - start;
7502 UBOUND(max, sizeof(trash) - len - 1);
7503 len += strlcpy2(trash + len, start, max + 1);
7504 trash[len++] = '\n';
7505 write(1, trash, len);
7506}
7507
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7508/*
7509 * Initialize a new HTTP transaction for session <s>. It is assumed that all
7510 * the required fields are properly allocated and that we only need to (re)init
7511 * them. This should be used before processing any new request.
7512 */
7513void http_init_txn(struct session *s)
7514{
7515 struct http_txn *txn = &s->txn;
7516 struct proxy *fe = s->fe;
7517
7518 txn->flags = 0;
7519 txn->status = -1;
7520
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]7521 txn->cookie_first_date = 0;
7522 txn->cookie_last_date = 0;
7523
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7524 txn->req.sol = txn->req.eol = NULL;
7525 txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
7526 txn->rsp.sol = txn->rsp.eol = NULL;
7527 txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */
Willy Tarreau124d9912011-03-01 20:30:48 +0100[diff] [blame]7528 txn->req.chunk_len = 0LL;
7529 txn->req.body_len = 0LL;
7530 txn->rsp.chunk_len = 0LL;
7531 txn->rsp.body_len = 0LL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7532 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
7533 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]7534
7535 txn->auth.method = HTTP_AUTH_UNKNOWN;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7536
7537 txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
7538 if (fe->options2 & PR_O2_REQBUG_OK)
7539 txn->req.err_pos = -1; /* let buggy requests pass */
7540
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7541 if (txn->req.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7542 memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *));
7543
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7544 if (txn->rsp.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7545 memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *));
7546
7547 if (txn->hdr_idx.v)
7548 hdr_idx_init(&txn->hdr_idx);
7549}
7550
7551/* to be used at the end of a transaction */
7552void http_end_txn(struct session *s)
7553{
7554 struct http_txn *txn = &s->txn;
7555
7556 /* these ones will have been dynamically allocated */
7557 pool_free2(pool2_requri, txn->uri);
7558 pool_free2(pool2_capture, txn->cli_cookie);
7559 pool_free2(pool2_capture, txn->srv_cookie);
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7560 pool_free2(apools.sessid, txn->sessid);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7561
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7562 txn->sessid = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7563 txn->uri = NULL;
7564 txn->srv_cookie = NULL;
7565 txn->cli_cookie = NULL;
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7566
7567 if (txn->req.cap) {
7568 struct cap_hdr *h;
7569 for (h = s->fe->req_cap; h; h = h->next)
7570 pool_free2(h->pool, txn->req.cap[h->index]);
7571 memset(txn->req.cap, 0, s->fe->nb_req_cap * sizeof(void *));
7572 }
7573
7574 if (txn->rsp.cap) {
7575 struct cap_hdr *h;
7576 for (h = s->fe->rsp_cap; h; h = h->next)
7577 pool_free2(h->pool, txn->rsp.cap[h->index]);
7578 memset(txn->rsp.cap, 0, s->fe->nb_rsp_cap * sizeof(void *));
7579 }
7580
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7581}
7582
7583/* to be used at the end of a transaction to prepare a new one */
7584void http_reset_txn(struct session *s)
7585{
7586 http_end_txn(s);
7587 http_init_txn(s);
7588
7589 s->be = s->fe;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7590 s->logs.logwait = s->fe->to_log;
Simon Hormanaf514952011-06-21 14:34:57 +0900[diff] [blame]7591 session_del_srv_conn(s);
Willy Tarreau9e000c62011-03-10 14:03:36 +0100[diff] [blame]7592 clear_target(&s->target);
Emeric Brunb982a3d2010-01-04 15:45:53 +0100[diff] [blame]7593 /* re-init store persistence */
7594 s->store_count = 0;
7595
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7596 s->pend_pos = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7597
7598 s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
7599
Willy Tarreau739cfba2010-01-25 23:11:14 +0100[diff] [blame]7600 /* We must trim any excess data from the response buffer, because we
7601 * may have blocked an invalid response from a server that we don't
7602 * want to accidentely forward once we disable the analysers, nor do
7603 * we want those data to come along with next response. A typical
7604 * example of such data would be from a buggy server responding to
7605 * a HEAD with some data, or sending more than the advertised
7606 * content-length.
7607 */
7608 if (unlikely(s->rep->l > s->rep->send_max)) {
7609 s->rep->l = s->rep->send_max;
7610 s->rep->r = s->rep->w + s->rep->l;
7611 if (s->rep->r >= s->rep->data + s->rep->size)
7612 s->rep->r -= s->rep->size;
7613 }
7614
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7615 s->req->rto = s->fe->timeout.client;
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7616 s->req->wto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7617
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7618 s->rep->rto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7619 s->rep->wto = s->fe->timeout.client;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7620
7621 s->req->rex = TICK_ETERNITY;
7622 s->req->wex = TICK_ETERNITY;
7623 s->req->analyse_exp = TICK_ETERNITY;
7624 s->rep->rex = TICK_ETERNITY;
7625 s->rep->wex = TICK_ETERNITY;
7626 s->rep->analyse_exp = TICK_ETERNITY;
7627}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7628
Willy Tarreauff011f22011-01-06 17:51:27 +0100[diff] [blame]7629void free_http_req_rules(struct list *r) {
7630 struct http_req_rule *tr, *pr;
7631
7632 list_for_each_entry_safe(pr, tr, r, list) {
7633 LIST_DEL(&pr->list);
7634 if (pr->action == HTTP_REQ_ACT_HTTP_AUTH)
7635 free(pr->http_auth.realm);
7636
7637 free(pr);
7638 }
7639}
7640
7641struct http_req_rule *parse_http_req_cond(const char **args, const char *file, int linenum, struct proxy *proxy)
7642{
7643 struct http_req_rule *rule;
7644 int cur_arg;
7645
7646 rule = (struct http_req_rule*)calloc(1, sizeof(struct http_req_rule));
7647 if (!rule) {
7648 Alert("parsing [%s:%d]: out of memory.\n", file, linenum);
7649 return NULL;
7650 }
7651
7652 if (!*args[0]) {
7653 goto req_error_parsing;
7654 } else if (!strcmp(args[0], "allow")) {
7655 rule->action = HTTP_REQ_ACT_ALLOW;
7656 cur_arg = 1;
7657 } else if (!strcmp(args[0], "deny")) {
7658 rule->action = HTTP_REQ_ACT_DENY;
7659 cur_arg = 1;
7660 } else if (!strcmp(args[0], "auth")) {
7661 rule->action = HTTP_REQ_ACT_HTTP_AUTH;
7662 cur_arg = 1;
7663
7664 while(*args[cur_arg]) {
7665 if (!strcmp(args[cur_arg], "realm")) {
7666 rule->http_auth.realm = strdup(args[cur_arg + 1]);
7667 cur_arg+=2;
7668 continue;
7669 } else
7670 break;
7671 }
7672 } else {
7673req_error_parsing:
7674 Alert("parsing [%s:%d]: %s '%s', expects 'allow', 'deny', 'auth'.\n",
7675 file, linenum, *args[1]?"unknown parameter":"missing keyword in", args[*args[1]?1:0]);
7676 return NULL;
7677 }
7678
7679 if (strcmp(args[cur_arg], "if") == 0 || strcmp(args[cur_arg], "unless") == 0) {
7680 struct acl_cond *cond;
7681
7682 if ((cond = build_acl_cond(file, linenum, proxy, args+cur_arg)) == NULL) {
7683 Alert("parsing [%s:%d] : error detected while parsing an 'http-request %s' condition.\n",
7684 file, linenum, args[0]);
7685 return NULL;
7686 }
7687 rule->cond = cond;
7688 }
7689 else if (*args[cur_arg]) {
7690 Alert("parsing [%s:%d]: 'http-request %s' expects 'realm' for 'auth' or"
7691 " either 'if' or 'unless' followed by a condition but found '%s'.\n",
7692 file, linenum, args[0], args[cur_arg]);
7693 return NULL;
7694 }
7695
7696 return rule;
7697}
7698
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7699/************************************************************************/
7700/* The code below is dedicated to ACL parsing and matching */
7701/************************************************************************/
7702
7703
7704
7705
7706/* 1. Check on METHOD
7707 * We use the pre-parsed method if it is known, and store its number as an
7708 * integer. If it is unknown, we use the pointer and the length.
7709 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7710static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7711{
7712 int len, meth;
7713
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7714 len = strlen(*text);
7715 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7716
7717 pattern->val.i = meth;
7718 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7719 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7720 if (!pattern->ptr.str)
7721 return 0;
7722 pattern->len = len;
7723 }
7724 return 1;
7725}
7726
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7727static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7728acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
7729 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7730{
7731 int meth;
7732 struct http_txn *txn = l7;
7733
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7734 if (!txn)
7735 return 0;
7736
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7737 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7738 return 0;
7739
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7740 meth = txn->meth;
7741 test->i = meth;
7742 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7743 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7744 /* ensure the indexes are not affected */
7745 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7746 test->len = txn->req.sl.rq.m_l;
7747 test->ptr = txn->req.sol;
7748 }
7749 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7750 return 1;
7751}
7752
7753static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
7754{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7755 int icase;
7756
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7757 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7758 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7759
7760 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7761 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7762
7763 /* Other method, we must compare the strings */
7764 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7765 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7766
7767 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
7768 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
7769 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7770 return ACL_PAT_FAIL;
7771 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7772}
7773
7774/* 2. Check on Request/Status Version
7775 * We simply compare strings here.
7776 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7777static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7778{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7779 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7780 if (!pattern->ptr.str)
7781 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7782 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7783 return 1;
7784}
7785
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7786static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7787acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
7788 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7789{
7790 struct http_txn *txn = l7;
7791 char *ptr;
7792 int len;
7793
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7794 if (!txn)
7795 return 0;
7796
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7797 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7798 return 0;
7799
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7800 len = txn->req.sl.rq.v_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7801 ptr = txn->req.sol + txn->req.sl.rq.v;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7802
7803 while ((len-- > 0) && (*ptr++ != '/'));
7804 if (len <= 0)
7805 return 0;
7806
7807 test->ptr = ptr;
7808 test->len = len;
7809
7810 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7811 return 1;
7812}
7813
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7814static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7815acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
7816 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7817{
7818 struct http_txn *txn = l7;
7819 char *ptr;
7820 int len;
7821
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7822 if (!txn)
7823 return 0;
7824
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7825 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7826 return 0;
7827
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7828 len = txn->rsp.sl.st.v_l;
7829 ptr = txn->rsp.sol;
7830
7831 while ((len-- > 0) && (*ptr++ != '/'));
7832 if (len <= 0)
7833 return 0;
7834
7835 test->ptr = ptr;
7836 test->len = len;
7837
7838 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7839 return 1;
7840}
7841
7842/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7843static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7844acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
7845 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7846{
7847 struct http_txn *txn = l7;
7848 char *ptr;
7849 int len;
7850
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7851 if (!txn)
7852 return 0;
7853
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7854 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7855 return 0;
7856
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7857 len = txn->rsp.sl.st.c_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7858 ptr = txn->rsp.sol + txn->rsp.sl.st.c;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7859
7860 test->i = __strl2ui(ptr, len);
7861 test->flags = ACL_TEST_F_VOL_1ST;
7862 return 1;
7863}
7864
7865/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7866static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7867acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
7868 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7869{
7870 struct http_txn *txn = l7;
7871
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7872 if (!txn)
7873 return 0;
7874
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7875 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7876 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7877
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7878 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7879 /* ensure the indexes are not affected */
7880 return 0;
7881
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7882 test->len = txn->req.sl.rq.u_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7883 test->ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7884
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]7885 /* we do not need to set READ_ONLY because the data is in a buffer */
7886 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7887 return 1;
7888}
7889
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7890static int
7891acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7892 struct acl_expr *expr, struct acl_test *test)
7893{
7894 struct http_txn *txn = l7;
7895
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7896 if (!txn)
7897 return 0;
7898
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7899 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7900 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7901
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7902 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7903 /* ensure the indexes are not affected */
7904 return 0;
7905
7906 /* Parse HTTP request */
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]7907 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->req->cons->addr.s.to);
7908 test->ptr = (void *)&((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr;
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7909 test->i = AF_INET;
7910
7911 /*
7912 * If we are parsing url in frontend space, we prepare backend stage
7913 * to not parse again the same url ! optimization lazyness...
7914 */
7915 if (px->options & PR_O_HTTP_PROXY)
7916 l4->flags |= SN_ADDR_SET;
7917
7918 test->flags = ACL_TEST_F_READ_ONLY;
7919 return 1;
7920}
7921
7922static int
7923acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
7924 struct acl_expr *expr, struct acl_test *test)
7925{
7926 struct http_txn *txn = l7;
7927
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7928 if (!txn)
7929 return 0;
7930
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7931 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7932 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7933
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7934 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7935 /* ensure the indexes are not affected */
7936 return 0;
7937
7938 /* Same optimization as url_ip */
Willy Tarreau957c0a52011-03-03 17:42:23 +0100[diff] [blame]7939 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->req->cons->addr.s.to);
7940 test->i = ntohs(((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_port);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7941
7942 if (px->options & PR_O_HTTP_PROXY)
7943 l4->flags |= SN_ADDR_SET;
7944
7945 test->flags = ACL_TEST_F_READ_ONLY;
7946 return 1;
7947}
7948
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7949/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
7950 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
7951 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7952static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7953acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7954 struct acl_expr *expr, struct acl_test *test)
7955{
7956 struct http_txn *txn = l7;
7957 struct hdr_idx *idx = &txn->hdr_idx;
7958 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7959
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7960 if (!txn)
7961 return 0;
7962
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7963 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7964 /* search for header from the beginning */
7965 ctx->idx = 0;
7966
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7967 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7968 test->flags |= ACL_TEST_F_FETCH_MORE;
7969 test->flags |= ACL_TEST_F_VOL_HDR;
7970 test->len = ctx->vlen;
7971 test->ptr = (char *)ctx->line + ctx->val;
7972 return 1;
7973 }
7974
7975 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7976 test->flags |= ACL_TEST_F_VOL_HDR;
7977 return 0;
7978}
7979
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7980static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7981acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
7982 struct acl_expr *expr, struct acl_test *test)
7983{
7984 struct http_txn *txn = l7;
7985
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7986 if (!txn)
7987 return 0;
7988
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7989 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7990 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7991
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7992 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7993 /* ensure the indexes are not affected */
7994 return 0;
7995
7996 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
7997}
7998
7999static int
8000acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
8001 struct acl_expr *expr, struct acl_test *test)
8002{
8003 struct http_txn *txn = l7;
8004
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8005 if (!txn)
8006 return 0;
8007
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8008 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8009 return 0;
8010
8011 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
8012}
8013
8014/* 6. Check on HTTP header count. The number of occurrences is returned.
8015 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
8016 */
8017static int
8018acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8019 struct acl_expr *expr, struct acl_test *test)
8020{
8021 struct http_txn *txn = l7;
8022 struct hdr_idx *idx = &txn->hdr_idx;
8023 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8024 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8025
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8026 if (!txn)
8027 return 0;
8028
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8029 ctx.idx = 0;
8030 cnt = 0;
8031 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
8032 cnt++;
8033
8034 test->i = cnt;
8035 test->flags = ACL_TEST_F_VOL_HDR;
8036 return 1;
8037}
8038
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8039static int
8040acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
8041 struct acl_expr *expr, struct acl_test *test)
8042{
8043 struct http_txn *txn = l7;
8044
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8045 if (!txn)
8046 return 0;
8047
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8048 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8049 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8050
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8051 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8052 /* ensure the indexes are not affected */
8053 return 0;
8054
8055 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
8056}
8057
8058static int
8059acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
8060 struct acl_expr *expr, struct acl_test *test)
8061{
8062 struct http_txn *txn = l7;
8063
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8064 if (!txn)
8065 return 0;
8066
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8067 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8068 return 0;
8069
8070 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
8071}
8072
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8073/* 7. Check on HTTP header's integer value. The integer value is returned.
8074 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8075 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8076 */
8077static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8078acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8079 struct acl_expr *expr, struct acl_test *test)
8080{
8081 struct http_txn *txn = l7;
8082 struct hdr_idx *idx = &txn->hdr_idx;
8083 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8084
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8085 if (!txn)
8086 return 0;
8087
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8088 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
8089 /* search for header from the beginning */
8090 ctx->idx = 0;
8091
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8092 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
8093 test->flags |= ACL_TEST_F_FETCH_MORE;
8094 test->flags |= ACL_TEST_F_VOL_HDR;
8095 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
8096 return 1;
8097 }
8098
8099 test->flags &= ~ACL_TEST_F_FETCH_MORE;
8100 test->flags |= ACL_TEST_F_VOL_HDR;
8101 return 0;
8102}
8103
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8104static int
8105acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
8106 struct acl_expr *expr, struct acl_test *test)
8107{
8108 struct http_txn *txn = l7;
8109
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8110 if (!txn)
8111 return 0;
8112
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8113 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8114 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8115
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8116 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8117 /* ensure the indexes are not affected */
8118 return 0;
8119
8120 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
8121}
8122
8123static int
8124acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
8125 struct acl_expr *expr, struct acl_test *test)
8126{
8127 struct http_txn *txn = l7;
8128
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8129 if (!txn)
8130 return 0;
8131
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8132 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8133 return 0;
8134
8135 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
8136}
8137
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8138/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
8139 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
8140 */
8141static int
8142acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
8143 struct acl_expr *expr, struct acl_test *test)
8144{
8145 struct http_txn *txn = l7;
8146 struct hdr_idx *idx = &txn->hdr_idx;
8147 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
8148
8149 if (!txn)
8150 return 0;
8151
8152 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
8153 /* search for header from the beginning */
8154 ctx->idx = 0;
8155
8156 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
8157 test->flags |= ACL_TEST_F_FETCH_MORE;
8158 test->flags |= ACL_TEST_F_VOL_HDR;
8159 /* Same optimization as url_ip */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100[diff] [blame]8160 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));
8161 url2ipv4((char *)ctx->line + ctx->val, &((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr);
8162 test->ptr = (void *)&((struct sockaddr_in *)&l4->req->cons->addr.s.to)->sin_addr;
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8163 test->i = AF_INET;
8164 return 1;
8165 }
8166
8167 test->flags &= ~ACL_TEST_F_FETCH_MORE;
8168 test->flags |= ACL_TEST_F_VOL_HDR;
8169 return 0;
8170}
8171
8172static int
8173acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
8174 struct acl_expr *expr, struct acl_test *test)
8175{
8176 struct http_txn *txn = l7;
8177
8178 if (!txn)
8179 return 0;
8180
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8181 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8182 return 0;
8183
8184 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8185 /* ensure the indexes are not affected */
8186 return 0;
8187
8188 return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
8189}
8190
8191static int
8192acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
8193 struct acl_expr *expr, struct acl_test *test)
8194{
8195 struct http_txn *txn = l7;
8196
8197 if (!txn)
8198 return 0;
8199
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8200 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]8201 return 0;
8202
8203 return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
8204}
8205
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8206/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
8207 * the first '/' after the possible hostname, and ends before the possible '?'.
8208 */
8209static int
8210acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
8211 struct acl_expr *expr, struct acl_test *test)
8212{
8213 struct http_txn *txn = l7;
8214 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]8215
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8216 if (!txn)
8217 return 0;
8218
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8219 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8220 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]8221
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]8222 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
8223 /* ensure the indexes are not affected */
8224 return 0;
8225
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]8226 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]8227 ptr = http_get_path(txn);
8228 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8229 return 0;
8230
8231 /* OK, we got the '/' ! */
8232 test->ptr = ptr;
8233
8234 while (ptr < end && *ptr != '?')
8235 ptr++;
8236
8237 test->len = ptr - test->ptr;
8238
8239 /* we do not need to set READ_ONLY because the data is in a buffer */
8240 test->flags = ACL_TEST_F_VOL_1ST;
8241 return 1;
8242}
8243
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8244static int
8245acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
8246 struct acl_expr *expr, struct acl_test *test)
8247{
8248 struct buffer *req = s->req;
8249 struct http_txn *txn = &s->txn;
8250 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]8251
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8252 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
8253 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
8254 */
8255
8256 if (!s || !req)
8257 return 0;
8258
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8259 if (unlikely(msg->msg_state >= HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8260 /* Already decoded as OK */
8261 test->flags |= ACL_TEST_F_SET_RES_PASS;
8262 return 1;
8263 }
8264
8265 /* Try to decode HTTP request */
8266 if (likely(req->lr < req->r))
8267 http_msg_analyzer(req, msg, &txn->hdr_idx);
8268
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]8269 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8270 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
8271 test->flags |= ACL_TEST_F_SET_RES_FAIL;
8272 return 1;
8273 }
8274 /* wait for final state */
8275 test->flags |= ACL_TEST_F_MAY_CHANGE;
8276 return 0;
8277 }
8278
8279 /* OK we got a valid HTTP request. We have some minor preparation to
8280 * perform so that further checks can rely on HTTP tests.
8281 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]8282 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8283 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
8284 s->flags |= SN_REDIRECTABLE;
8285
8286 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
8287 test->flags |= ACL_TEST_F_SET_RES_FAIL;
8288 return 1;
8289 }
8290
8291 test->flags |= ACL_TEST_F_SET_RES_PASS;
8292 return 1;
8293}
8294
Willy Tarreau7f18e522010-10-22 20:04:13 +0200[diff] [blame]8295/* return a valid test if the current request is the first one on the connection */
8296static int
8297acl_fetch_http_first_req(struct proxy *px, struct session *s, void *l7, int dir,
8298 struct acl_expr *expr, struct acl_test *test)
8299{
8300 if (!s)
8301 return 0;
8302
8303 if (s->txn.flags & TX_NOT_FIRST)
8304 test->flags |= ACL_TEST_F_SET_RES_FAIL;
8305 else
8306 test->flags |= ACL_TEST_F_SET_RES_PASS;
8307
8308 return 1;
8309}
8310
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8311static int
8312acl_fetch_http_auth(struct proxy *px, struct session *s, void *l7, int dir,
8313 struct acl_expr *expr, struct acl_test *test)
8314{
8315
8316 if (!s)
8317 return 0;
8318
8319 if (!get_http_auth(s))
8320 return 0;
8321
8322 test->ctx.a[0] = expr->arg.ul;
8323 test->ctx.a[1] = s->txn.auth.user;
8324 test->ctx.a[2] = s->txn.auth.pass;
8325
8326 test->flags |= ACL_TEST_F_READ_ONLY | ACL_TEST_F_NULL_MATCH;
8327
8328 return 1;
8329}
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8330
8331/************************************************************************/
8332/* All supported keywords must be declared here. */
8333/************************************************************************/
8334
8335/* Note: must not be declared <const> as its list will be overwritten */
8336static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8337 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
8338
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8339 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8340 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
8341 { "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]8342 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8343
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8344 { "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]8345 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8346 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8347 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8348 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8349 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
8350 { "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]8351 { "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]8352 { "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]8353
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8354 /* 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]8355 { "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]8356 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
8357 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8358 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8359 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8360 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8361 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
8362 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
8363 { "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]8364 { "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]8365
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8366 { "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]8367 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
8368 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
8369 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
8370 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
8371 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
8372 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
8373 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
8374 { "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]8375 { "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]8376
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8377 { "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]8378 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
8379 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8380 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8381 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8382 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8383 { "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]8384
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]8385#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8386 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
8387 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
8388 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
8389 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
8390 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
8391 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
8392 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
8393
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8394 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
8395 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
8396 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
8397 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
8398 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
8399 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
8400 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
8401 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8402#endif
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8403
Willy Tarreau7f18e522010-10-22 20:04:13 +0200[diff] [blame]8404 { "http_auth", acl_parse_nothing, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT },
8405 { "http_auth_group", acl_parse_strcat, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT },
8406 { "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]8407 { NULL, NULL, NULL, NULL },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8408}};
8409
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8410/************************************************************************/
8411/* The code below is dedicated to pattern fetching and matching */
8412/************************************************************************/
8413
8414/* extract the IP address from the last occurrence of specified header. Note
8415 * that we should normally first extract the string then convert it to IP,
8416 * but right now we have all the functions to do this seemlessly, and we will
8417 * be able to change that later without touching the configuration.
8418 */
8419static int
8420pattern_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8421 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8422{
8423 struct http_txn *txn = l7;
8424
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8425 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]8426 return data->ip.s_addr != 0;
8427}
8428
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8429/*
8430 * Given a path string and its length, find the position of beginning of the
8431 * query string. Returns NULL if no query string is found in the path.
8432 *
8433 * Example: if path = "/foo/bar/fubar?yo=mama;ye=daddy", and n = 22:
8434 *
8435 * find_query_string(path, n) points to "yo=mama;ye=daddy" string.
8436 */
8437static inline char *find_query_string(char *path, size_t path_l)
8438{
8439 char *p;
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8440
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8441 p = memchr(path, '?', path_l);
8442 return p ? p + 1 : NULL;
8443}
8444
8445static inline int is_param_delimiter(char c)
8446{
8447 return c == '&' || c == ';';
8448}
8449
8450/*
8451 * Given a url parameter, find the starting position of the first occurence,
8452 * or NULL if the parameter is not found.
8453 *
8454 * Example: if query_string is "yo=mama;ye=daddy" and url_param_name is "ye",
8455 * the function will return query_string+8.
8456 */
8457static char*
8458find_url_param_pos(char* query_string, size_t query_string_l,
8459 char* url_param_name, size_t url_param_name_l)
8460{
8461 char *pos, *last;
8462
8463 pos = query_string;
8464 last = query_string + query_string_l - url_param_name_l - 1;
8465
8466 while (pos <= last) {
8467 if (pos[url_param_name_l] == '=') {
8468 if (memcmp(pos, url_param_name, url_param_name_l) == 0)
8469 return pos;
8470 pos += url_param_name_l + 1;
8471 }
8472 while (pos <= last && !is_param_delimiter(*pos))
8473 pos++;
8474 pos++;
8475 }
8476 return NULL;
8477}
8478
8479/*
8480 * Given a url parameter name, returns its value and size into *value and
8481 * *value_l respectively, and returns non-zero. If the parameter is not found,
8482 * zero is returned and value/value_l are not touched.
8483 */
8484static int
8485find_url_param_value(char* path, size_t path_l,
8486 char* url_param_name, size_t url_param_name_l,
8487 char** value, size_t* value_l)
8488{
8489 char *query_string, *qs_end;
8490 char *arg_start;
8491 char *value_start, *value_end;
8492
8493 query_string = find_query_string(path, path_l);
8494 if (!query_string)
8495 return 0;
8496
8497 qs_end = path + path_l;
8498 arg_start = find_url_param_pos(query_string, qs_end - query_string,
8499 url_param_name, url_param_name_l);
8500 if (!arg_start)
8501 return 0;
8502
8503 value_start = arg_start + url_param_name_l + 1;
8504 value_end = value_start;
8505
8506 while ((value_end < qs_end) && !is_param_delimiter(*value_end))
8507 value_end++;
8508
8509 *value = value_start;
8510 *value_l = value_end - value_start;
Willy Tarreau00134332011-01-04 14:57:34 +0100[diff] [blame]8511 return value_end != value_start;
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8512}
8513
8514static int
8515pattern_fetch_url_param(struct proxy *px, struct session *l4, void *l7, int dir,
8516 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
8517{
8518 struct http_txn *txn = l7;
8519 struct http_msg *msg = &txn->req;
8520 char *url_param_value;
8521 size_t url_param_value_l;
8522
8523 if (!find_url_param_value(msg->sol + msg->sl.rq.u, msg->sl.rq.u_l,
8524 arg_p->data.str.str, arg_p->data.str.len,
8525 &url_param_value, &url_param_value_l))
8526 return 0;
8527
8528 data->str.str = url_param_value;
8529 data->str.len = url_param_value_l;
8530 return 1;
8531}
8532
Willy Tarreaub3eb2212011-07-01 16:16:17 +0200[diff] [blame]8533/* Try to find the last occurrence of a cookie name in a cookie header value.
8534 * The pointer and size of the last occurrence of the cookie value is returned
8535 * into *value and *value_l, and the function returns non-zero if the value was
8536 * found. Otherwise if the cookie was not found, zero is returned and neither
8537 * value nor value_l are touched. The input hdr string should begin at the
8538 * header's value, and its size should be in hdr_l. <list> must be non-zero if
8539 * value may represent a list of values (cookie headers).
8540 */
8541static int
8542extract_cookie_value(char *hdr, size_t hdr_l,
8543 char *cookie_name, size_t cookie_name_l, int list,
8544 char **value, size_t *value_l)
8545{
8546 int found = 0;
8547 char *equal, *att_end, *att_beg, *hdr_end, *val_beg, *val_end;
8548 char *next;
8549
8550 /* Note that multiple cookies may be delimited with semi-colons, so we
8551 * also have to loop on this.
8552 */
8553
8554 /* we search at least a cookie name followed by an equal, and more
8555 * generally something like this :
8556 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
8557 */
8558 if (hdr_l < cookie_name_l + 1)
8559 return 0;
8560
8561 hdr_end = hdr + hdr_l;
8562
8563 for (att_beg = hdr; att_beg < hdr_end; att_beg = next + 1) {
8564 /* Iterate through all cookies on this line */
8565
8566 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
8567 att_beg++;
8568
8569 /* find att_end : this is the first character after the last non
8570 * space before the equal. It may be equal to hdr_end.
8571 */
8572 equal = att_end = att_beg;
8573
8574 while (equal < hdr_end) {
8575 if (*equal == '=' || *equal == ';' || (list && *equal == ','))
8576 break;
8577 if (http_is_spht[(unsigned char)*equal++])
8578 continue;
8579 att_end = equal;
8580 }
8581
8582 /* here, <equal> points to '=', a delimitor or the end. <att_end>
8583 * is between <att_beg> and <equal>, both may be identical.
8584 */
8585
8586 /* look for end of cookie if there is an equal sign */
8587 if (equal < hdr_end && *equal == '=') {
8588 /* look for the beginning of the value */
8589 val_beg = equal + 1;
8590 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
8591 val_beg++;
8592
8593 /* find the end of the value, respecting quotes */
8594 next = find_cookie_value_end(val_beg, hdr_end);
8595
8596 /* make val_end point to the first white space or delimitor after the value */
8597 val_end = next;
8598 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
8599 val_end--;
8600 } else {
8601 val_beg = val_end = next = equal;
8602 }
8603
8604 /* We have nothing to do with attributes beginning with '$'. However,
8605 * they will automatically be removed if a header before them is removed,
8606 * since they're supposed to be linked together.
8607 */
8608 if (*att_beg == '$')
8609 continue;
8610
8611 /* Ignore cookies with no equal sign */
8612 if (equal == next)
8613 continue;
8614
8615 /* Now we have the cookie name between att_beg and att_end, and
8616 * its value between val_beg and val_end.
8617 */
8618
8619 if (att_end - att_beg == cookie_name_l &&
8620 memcmp(att_beg, cookie_name, cookie_name_l) == 0) {
8621 found = 1;
8622 *value = val_beg;
8623 *value_l = val_end - val_beg;
8624 /* right now we want to catch the last occurrence
8625 * of the cookie, so let's go on searching.
8626 */
8627 }
8628
8629 /* Set-Cookie headers only have the name in the first attr=value part */
8630 if (!list)
8631 break;
8632 }
8633
8634 return found;
8635}
8636
8637/* Try to find in request or response message is in <msg> and whose transaction
8638 * is in <txn> the last occurrence of a cookie name in all cookie header values
8639 * whose header name is <hdr_name> with name of length <hdr_name_len>. The
8640 * pointer and size of the last occurrence of the cookie value is returned into
8641 * <value> and <value_l>, and the function returns non-zero if the value was
8642 * found. Otherwise if the cookie was not found, zero is returned and neither
8643 * value nor value_l are touched. The input hdr string should begin at the
8644 * header's value, and its size should be in hdr_l. <list> must be non-zero if
8645 * value may represent a list of values (cookie headers).
8646 */
8647
8648static int
8649find_cookie_value(struct http_msg *msg, struct http_txn *txn,
8650 const char *hdr_name, int hdr_name_len,
8651 char *cookie_name, size_t cookie_name_l, int list,
8652 char **value, size_t *value_l)
8653{
8654 struct hdr_ctx ctx;
8655 int found = 0;
8656
8657 ctx.idx = 0;
8658 while (http_find_header2(hdr_name, hdr_name_len, msg->sol, &txn->hdr_idx, &ctx)) {
8659 if (ctx.vlen < cookie_name_l + 1)
8660 continue;
8661
8662 found |= extract_cookie_value(ctx.line + ctx.val, ctx.vlen,
8663 cookie_name, cookie_name_l, 1,
8664 value, value_l);
8665 }
8666 return found;
8667}
8668
8669static int
8670pattern_fetch_cookie(struct proxy *px, struct session *l4, void *l7, int dir,
8671 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
8672{
8673 struct http_txn *txn = l7;
8674 struct http_msg *msg = &txn->req;
8675 char *cookie_value;
8676 size_t cookie_value_l;
8677 int found = 0;
8678
8679 found = find_cookie_value(msg, txn, "Cookie", 6,
8680 arg_p->data.str.str, arg_p->data.str.len, 1,
8681 &cookie_value, &cookie_value_l);
8682 if (found) {
8683 data->str.str = cookie_value;
8684 data->str.len = cookie_value_l;
8685 }
8686
8687 return found;
8688}
8689
8690
8691static int
8692pattern_fetch_set_cookie(struct proxy *px, struct session *l4, void *l7, int dir,
8693 const struct pattern_arg *arg_p, int arg_i, union pattern_data *data)
8694{
8695 struct http_txn *txn = l7;
8696 struct http_msg *msg = &txn->rsp;
8697 char *cookie_value;
8698 size_t cookie_value_l;
8699 int found = 0;
8700
8701 found = find_cookie_value(msg, txn, "Set-Cookie", 10,
8702 arg_p->data.str.str, arg_p->data.str.len, 1,
8703 &cookie_value, &cookie_value_l);
8704 if (found) {
8705 data->str.str = cookie_value;
8706 data->str.len = cookie_value_l;
8707 }
8708
8709 return found;
8710}
8711
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8712
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8713/************************************************************************/
8714/* All supported keywords must be declared here. */
8715/************************************************************************/
8716/* Note: must not be declared <const> as its list will be overwritten */
8717static struct pattern_fetch_kw_list pattern_fetch_keywords = {{ },{
Emeric Brun485479d2010-09-23 18:02:19 +0200[diff] [blame]8718 { "hdr", pattern_fetch_hdr_ip, pattern_arg_str, PATTERN_TYPE_IP, PATTERN_FETCH_REQ },
David Cournapeau16023ee2010-12-23 20:55:41 +0900[diff] [blame]8719 { "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]8720 { "cookie", pattern_fetch_cookie, pattern_arg_str, PATTERN_TYPE_STRING, PATTERN_FETCH_REQ },
8721 { "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]8722 { NULL, NULL, NULL, 0, 0 },
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8723}};
8724
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8725
8726__attribute__((constructor))
8727static void __http_protocol_init(void)
8728{
8729 acl_register_keywords(&acl_kws);
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8730 pattern_register_fetches(&pattern_fetch_keywords);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8731}
8732
8733
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]8734/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]8735 * Local variables:
8736 * c-indent-level: 8
8737 * c-basic-offset: 8
8738 * End:
8739 */