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git01.mediatek.com / haproxy / 8b0cbf99693e3cf41f3b66b9495da0ba30fcad39 / . / src / proto_http.c
blob: a5e6e161e28252ad2c8b9493e1a7996c01be545e [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1/*
2 * HTTP protocol analyzer
3 *
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]4 * Copyright 2000-2010 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 Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]71/* This is used by remote monitoring */
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]72const char HTTP_200[] =
Willy Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]73 "HTTP/1.0 200 OK\r\n"
74 "Cache-Control: no-cache\r\n"
75 "Connection: close\r\n"
76 "Content-Type: text/html\r\n"
77 "\r\n"
78 "<html><body><h1>200 OK</h1>\nHAProxy: service ready.\n</body></html>\n";
79
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]80const struct chunk http_200_chunk = {
81 .str = (char *)&HTTP_200,
82 .len = sizeof(HTTP_200)-1
83};
84
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]85/* Warning: no "connection" header is provided with the 3xx messages below */
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]86const char *HTTP_301 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]87 "HTTP/1.1 301 Moved Permanently\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]88 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]89 "Content-length: 0\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]90 "Location: "; /* not terminated since it will be concatenated with the URL */
91
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]92const char *HTTP_302 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]93 "HTTP/1.1 302 Found\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]94 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]95 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]96 "Location: "; /* not terminated since it will be concatenated with the URL */
97
98/* same as 302 except that the browser MUST retry with the GET method */
99const char *HTTP_303 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]100 "HTTP/1.1 303 See Other\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]101 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]102 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]103 "Location: "; /* not terminated since it will be concatenated with the URL */
104
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]105/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
106const char *HTTP_401_fmt =
107 "HTTP/1.0 401 Unauthorized\r\n"
108 "Cache-Control: no-cache\r\n"
109 "Connection: close\r\n"
Willy Tarreau791d66d2006-07-08 16:53:38 +0200[diff] [blame]110 "Content-Type: text/html\r\n"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]111 "WWW-Authenticate: Basic realm=\"%s\"\r\n"
112 "\r\n"
113 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
114
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]115const char *HTTP_407_fmt =
116 "HTTP/1.0 407 Unauthorized\r\n"
117 "Cache-Control: no-cache\r\n"
118 "Connection: close\r\n"
119 "Content-Type: text/html\r\n"
120 "Proxy-Authenticate: Basic realm=\"%s\"\r\n"
121 "\r\n"
122 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
123
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]124
125const int http_err_codes[HTTP_ERR_SIZE] = {
126 [HTTP_ERR_400] = 400,
127 [HTTP_ERR_403] = 403,
128 [HTTP_ERR_408] = 408,
129 [HTTP_ERR_500] = 500,
130 [HTTP_ERR_502] = 502,
131 [HTTP_ERR_503] = 503,
132 [HTTP_ERR_504] = 504,
133};
134
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]135static const char *http_err_msgs[HTTP_ERR_SIZE] = {
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]136 [HTTP_ERR_400] =
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]137 "HTTP/1.0 400 Bad request\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]138 "Cache-Control: no-cache\r\n"
139 "Connection: close\r\n"
140 "Content-Type: text/html\r\n"
141 "\r\n"
142 "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
143
144 [HTTP_ERR_403] =
145 "HTTP/1.0 403 Forbidden\r\n"
146 "Cache-Control: no-cache\r\n"
147 "Connection: close\r\n"
148 "Content-Type: text/html\r\n"
149 "\r\n"
150 "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
151
152 [HTTP_ERR_408] =
153 "HTTP/1.0 408 Request Time-out\r\n"
154 "Cache-Control: no-cache\r\n"
155 "Connection: close\r\n"
156 "Content-Type: text/html\r\n"
157 "\r\n"
158 "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
159
160 [HTTP_ERR_500] =
161 "HTTP/1.0 500 Server Error\r\n"
162 "Cache-Control: no-cache\r\n"
163 "Connection: close\r\n"
164 "Content-Type: text/html\r\n"
165 "\r\n"
166 "<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
167
168 [HTTP_ERR_502] =
169 "HTTP/1.0 502 Bad Gateway\r\n"
170 "Cache-Control: no-cache\r\n"
171 "Connection: close\r\n"
172 "Content-Type: text/html\r\n"
173 "\r\n"
174 "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
175
176 [HTTP_ERR_503] =
177 "HTTP/1.0 503 Service Unavailable\r\n"
178 "Cache-Control: no-cache\r\n"
179 "Connection: close\r\n"
180 "Content-Type: text/html\r\n"
181 "\r\n"
182 "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
183
184 [HTTP_ERR_504] =
185 "HTTP/1.0 504 Gateway Time-out\r\n"
186 "Cache-Control: no-cache\r\n"
187 "Connection: close\r\n"
188 "Content-Type: text/html\r\n"
189 "\r\n"
190 "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
191
192};
193
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]194/* We must put the messages here since GCC cannot initialize consts depending
195 * on strlen().
196 */
197struct chunk http_err_chunks[HTTP_ERR_SIZE];
198
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]199#define FD_SETS_ARE_BITFIELDS
200#ifdef FD_SETS_ARE_BITFIELDS
201/*
202 * This map is used with all the FD_* macros to check whether a particular bit
203 * is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
204 * which should be encoded. When FD_ISSET() returns non-zero, it means that the
205 * byte should be encoded. Be careful to always pass bytes from 0 to 255
206 * exclusively to the macros.
207 */
208fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
209fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
210
211#else
212#error "Check if your OS uses bitfields for fd_sets"
213#endif
214
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]215void init_proto_http()
216{
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]217 int i;
218 char *tmp;
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]219 int msg;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]220
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]221 for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
222 if (!http_err_msgs[msg]) {
223 Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
224 abort();
225 }
226
227 http_err_chunks[msg].str = (char *)http_err_msgs[msg];
228 http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
229 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]230
231 /* initialize the log header encoding map : '{|}"#' should be encoded with
232 * '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
233 * URL encoding only requires '"', '#' to be encoded as well as non-
234 * printable characters above.
235 */
236 memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
237 memset(url_encode_map, 0, sizeof(url_encode_map));
238 for (i = 0; i < 32; i++) {
239 FD_SET(i, hdr_encode_map);
240 FD_SET(i, url_encode_map);
241 }
242 for (i = 127; i < 256; i++) {
243 FD_SET(i, hdr_encode_map);
244 FD_SET(i, url_encode_map);
245 }
246
247 tmp = "\"#{|}";
248 while (*tmp) {
249 FD_SET(*tmp, hdr_encode_map);
250 tmp++;
251 }
252
253 tmp = "\"#";
254 while (*tmp) {
255 FD_SET(*tmp, url_encode_map);
256 tmp++;
257 }
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]258
259 /* memory allocations */
260 pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]261 pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]262}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]263
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]264/*
265 * We have 26 list of methods (1 per first letter), each of which can have
266 * up to 3 entries (2 valid, 1 null).
267 */
268struct http_method_desc {
269 http_meth_t meth;
270 int len;
271 const char text[8];
272};
273
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]274const struct http_method_desc http_methods[26][3] = {
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]275 ['C' - 'A'] = {
276 [0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
277 },
278 ['D' - 'A'] = {
279 [0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
280 },
281 ['G' - 'A'] = {
282 [0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
283 },
284 ['H' - 'A'] = {
285 [0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
286 },
287 ['P' - 'A'] = {
288 [0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
289 [1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
290 },
291 ['T' - 'A'] = {
292 [0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
293 },
294 /* rest is empty like this :
295 * [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
296 */
297};
298
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]299/* 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]300 * table than to perform a boolean AND or OR between two tests. Refer to
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]301 * RFC2616 for those chars.
302 */
303
304const char http_is_spht[256] = {
305 [' '] = 1, ['\t'] = 1,
306};
307
308const char http_is_crlf[256] = {
309 ['\r'] = 1, ['\n'] = 1,
310};
311
312const char http_is_lws[256] = {
313 [' '] = 1, ['\t'] = 1,
314 ['\r'] = 1, ['\n'] = 1,
315};
316
317const char http_is_sep[256] = {
318 ['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
319 ['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
320 ['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
321 ['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
322 [' '] = 1, ['\t'] = 1, ['\\'] = 1,
323};
324
325const char http_is_ctl[256] = {
326 [0 ... 31] = 1,
327 [127] = 1,
328};
329
330/*
331 * A token is any ASCII char that is neither a separator nor a CTL char.
332 * Do not overwrite values in assignment since gcc-2.95 will not handle
333 * them correctly. Instead, define every non-CTL char's status.
334 */
335const char http_is_token[256] = {
336 [' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
337 ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
338 ['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
339 [','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
340 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
341 ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
342 ['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
343 ['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
344 ['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
345 ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
346 ['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
347 ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
348 ['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
349 ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
350 ['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
351 ['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
352 ['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
353 ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
354 ['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
355 ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
356 ['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
357 ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
358 ['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
359 ['|'] = 1, ['}'] = 0, ['~'] = 1,
360};
361
362
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]363/*
364 * An http ver_token is any ASCII which can be found in an HTTP version,
365 * which includes 'H', 'T', 'P', '/', '.' and any digit.
366 */
367const char http_is_ver_token[256] = {
368 ['.'] = 1, ['/'] = 1,
369 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
370 ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
371 ['H'] = 1, ['P'] = 1, ['T'] = 1,
372};
373
374
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]375/*
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]376 * Silent debug that outputs only in strace, using fd #-1. Trash is modified.
377 */
378#if defined(DEBUG_FSM)
379static void http_silent_debug(int line, struct session *s)
380{
381 int size = 0;
382 size += snprintf(trash + size, sizeof(trash) - size,
383 "[%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",
384 line,
385 s->si[0].state, s->si[0].fd, s->txn.req.msg_state, s->req->flags, s->req->analysers,
386 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);
387 write(-1, trash, size);
388 size = 0;
389 size += snprintf(trash + size, sizeof(trash) - size,
390 " %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",
391 line,
392 s->si[1].state, s->si[1].fd, s->txn.rsp.msg_state, s->rep->flags, s->rep->analysers,
393 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);
394
395 write(-1, trash, size);
396}
397#else
398#define http_silent_debug(l,s) do { } while (0)
399#endif
400
401/*
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]402 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
403 * CRLF. Text length is measured first, so it cannot be NULL.
404 * The header is also automatically added to the index <hdr_idx>, and the end
405 * of headers is automatically adjusted. The number of bytes added is returned
406 * on success, otherwise <0 is returned indicating an error.
407 */
408int http_header_add_tail(struct buffer *b, struct http_msg *msg,
409 struct hdr_idx *hdr_idx, const char *text)
410{
411 int bytes, len;
412
413 len = strlen(text);
414 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
415 if (!bytes)
416 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]417 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]418 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
419}
420
421/*
422 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
423 * CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
424 * the buffer is only opened and the space reserved, but nothing is copied.
425 * The header is also automatically added to the index <hdr_idx>, and the end
426 * of headers is automatically adjusted. The number of bytes added is returned
427 * on success, otherwise <0 is returned indicating an error.
428 */
429int http_header_add_tail2(struct buffer *b, struct http_msg *msg,
430 struct hdr_idx *hdr_idx, const char *text, int len)
431{
432 int bytes;
433
434 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
435 if (!bytes)
436 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]437 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]438 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
439}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]440
441/*
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]442 * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
443 * If so, returns the position of the first non-space character relative to
444 * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
445 * to return a pointer to the place after the first space. Returns 0 if the
446 * header name does not match. Checks are case-insensitive.
447 */
448int http_header_match2(const char *hdr, const char *end,
449 const char *name, int len)
450{
451 const char *val;
452
453 if (hdr + len >= end)
454 return 0;
455 if (hdr[len] != ':')
456 return 0;
457 if (strncasecmp(hdr, name, len) != 0)
458 return 0;
459 val = hdr + len + 1;
460 while (val < end && HTTP_IS_SPHT(*val))
461 val++;
462 if ((val >= end) && (len + 2 <= end - hdr))
463 return len + 2; /* we may replace starting from second space */
464 return val - hdr;
465}
466
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]467/* Find the end of the header value contained between <s> and <e>. See RFC2616,
468 * par 2.2 for more information. Note that it requires a valid header to return
469 * a valid result. This works for headers defined as comma-separated lists.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]470 */
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]471char *find_hdr_value_end(char *s, const char *e)
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]472{
473 int quoted, qdpair;
474
475 quoted = qdpair = 0;
476 for (; s < e; s++) {
477 if (qdpair) qdpair = 0;
Willy Tarreau0f7f51f2010-08-30 11:06:34 +0200[diff] [blame]478 else if (quoted) {
479 if (*s == '\\') qdpair = 1;
480 else if (*s == '"') quoted = 0;
481 }
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]482 else if (*s == '"') quoted = 1;
483 else if (*s == ',') return s;
484 }
485 return s;
486}
487
488/* Find the first or next occurrence of header <name> in message buffer <sol>
489 * using headers index <idx>, and return it in the <ctx> structure. This
490 * structure holds everything necessary to use the header and find next
491 * occurrence. If its <idx> member is 0, the header is searched from the
492 * beginning. Otherwise, the next occurrence is returned. The function returns
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]493 * 1 when it finds a value, and 0 when there is no more. It is designed to work
494 * with headers defined as comma-separated lists. As a special case, if ctx->val
495 * is NULL when searching for a new values of a header, the current header is
496 * rescanned. This allows rescanning after a header deletion.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]497 */
498int http_find_header2(const char *name, int len,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]499 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]500 struct hdr_ctx *ctx)
501{
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]502 char *eol, *sov;
503 int cur_idx, old_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]504
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]505 cur_idx = ctx->idx;
506 if (cur_idx) {
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]507 /* We have previously returned a value, let's search
508 * another one on the same line.
509 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]510 sol = ctx->line;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]511 ctx->del = ctx->val + ctx->vlen;
512 sov = sol + ctx->del;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]513 eol = sol + idx->v[cur_idx].len;
514
515 if (sov >= eol)
516 /* no more values in this header */
517 goto next_hdr;
518
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]519 /* values remaining for this header, skip the comma but save it
520 * for later use (eg: for header deletion).
521 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]522 sov++;
523 while (sov < eol && http_is_lws[(unsigned char)*sov])
524 sov++;
525
526 goto return_hdr;
527 }
528
529 /* first request for this header */
530 sol += hdr_idx_first_pos(idx);
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]531 old_idx = 0;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]532 cur_idx = hdr_idx_first_idx(idx);
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]533 while (cur_idx) {
534 eol = sol + idx->v[cur_idx].len;
535
Willy Tarreau1ad7c6d2007-06-10 21:42:55 +0200[diff] [blame]536 if (len == 0) {
537 /* No argument was passed, we want any header.
538 * To achieve this, we simply build a fake request. */
539 while (sol + len < eol && sol[len] != ':')
540 len++;
541 name = sol;
542 }
543
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]544 if ((len < eol - sol) &&
545 (sol[len] == ':') &&
546 (strncasecmp(sol, name, len) == 0)) {
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]547 ctx->del = len;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]548 sov = sol + len + 1;
549 while (sov < eol && http_is_lws[(unsigned char)*sov])
550 sov++;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]551
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]552 ctx->line = sol;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]553 ctx->prev = old_idx;
554 return_hdr:
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]555 ctx->idx = cur_idx;
556 ctx->val = sov - sol;
557
558 eol = find_hdr_value_end(sov, eol);
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];
597 if (sol[ctx->del] == ':' && ctx->val + ctx->vlen == hdr->len) {
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;
604 ctx->idx = ctx->prev; /* walk back to the end of previous header */
605 ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1;
606 ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */
607 ctx->vlen = 0;
608 return ctx->idx;
609 }
610
611 /* This was not the only value of this header. We have to remove between
612 * ctx->del+1 and ctx->val+ctx->vlen+1 included. If it is the last entry
613 * of the list, we remove the last separator.
614 */
615
616 skip_comma = (ctx->val + ctx->vlen == hdr->len) ? 0 : 1;
617 delta = buffer_replace2(buf, sol + ctx->del + skip_comma,
618 sol + ctx->val + ctx->vlen + skip_comma,
619 NULL, 0);
620 hdr->len += delta;
621 http_msg_move_end(msg, delta);
622 ctx->val = ctx->del;
623 ctx->vlen = 0;
624 return ctx->idx;
625}
626
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]627/* This function handles a server error at the stream interface level. The
628 * stream interface is assumed to be already in a closed state. An optional
629 * message is copied into the input buffer, and an HTTP status code stored.
630 * The error flags are set to the values in arguments. Any pending request
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]631 * in this buffer will be lost.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]632 */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]633static void http_server_error(struct session *t, struct stream_interface *si,
634 int err, int finst, int status, const struct chunk *msg)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]635{
Willy Tarreaud5fd51c2010-01-22 14:17:47 +0100[diff] [blame]636 buffer_auto_read(si->ob);
637 buffer_abort(si->ob);
638 buffer_auto_close(si->ob);
639 buffer_erase(si->ob);
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]640 buffer_auto_close(si->ib);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]641 buffer_auto_read(si->ib);
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]642 if (status > 0 && msg) {
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]643 t->txn.status = status;
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]644 buffer_write(si->ib, msg->str, msg->len);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]645 }
646 if (!(t->flags & SN_ERR_MASK))
647 t->flags |= err;
648 if (!(t->flags & SN_FINST_MASK))
649 t->flags |= finst;
650}
651
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]652/* This function returns the appropriate error location for the given session
653 * and message.
654 */
655
656struct chunk *error_message(struct session *s, int msgnum)
657{
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]658 if (s->be->errmsg[msgnum].str)
659 return &s->be->errmsg[msgnum];
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]660 else if (s->fe->errmsg[msgnum].str)
661 return &s->fe->errmsg[msgnum];
662 else
663 return &http_err_chunks[msgnum];
664}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]665
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]666/*
667 * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
668 * string), HTTP_METH_OTHER for unknown methods, or the identified method.
669 */
670static http_meth_t find_http_meth(const char *str, const int len)
671{
672 unsigned char m;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]673 const struct http_method_desc *h;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]674
675 m = ((unsigned)*str - 'A');
676
677 if (m < 26) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]678 for (h = http_methods[m]; h->len > 0; h++) {
679 if (unlikely(h->len != len))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]680 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]681 if (likely(memcmp(str, h->text, h->len) == 0))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]682 return h->meth;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]683 };
684 return HTTP_METH_OTHER;
685 }
686 return HTTP_METH_NONE;
687
688}
689
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]690/* Parse the URI from the given transaction (which is assumed to be in request
691 * phase) and look for the "/" beginning the PATH. If not found, return NULL.
692 * It is returned otherwise.
693 */
694static char *
695http_get_path(struct http_txn *txn)
696{
697 char *ptr, *end;
698
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]699 ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]700 end = ptr + txn->req.sl.rq.u_l;
701
702 if (ptr >= end)
703 return NULL;
704
705 /* RFC2616, par. 5.1.2 :
706 * Request-URI = "*" | absuri | abspath | authority
707 */
708
709 if (*ptr == '*')
710 return NULL;
711
712 if (isalpha((unsigned char)*ptr)) {
713 /* this is a scheme as described by RFC3986, par. 3.1 */
714 ptr++;
715 while (ptr < end &&
716 (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
717 ptr++;
718 /* skip '://' */
719 if (ptr == end || *ptr++ != ':')
720 return NULL;
721 if (ptr == end || *ptr++ != '/')
722 return NULL;
723 if (ptr == end || *ptr++ != '/')
724 return NULL;
725 }
726 /* skip [user[:passwd]@]host[:[port]] */
727
728 while (ptr < end && *ptr != '/')
729 ptr++;
730
731 if (ptr == end)
732 return NULL;
733
734 /* OK, we got the '/' ! */
735 return ptr;
736}
737
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]738/* Returns a 302 for a redirectable request. This may only be called just after
739 * the stream interface has moved to SI_ST_ASS. Unprocessable requests are
740 * left unchanged and will follow normal proxy processing.
741 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]742void perform_http_redirect(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]743{
744 struct http_txn *txn;
745 struct chunk rdr;
746 char *path;
747 int len;
748
749 /* 1: create the response header */
750 rdr.len = strlen(HTTP_302);
751 rdr.str = trash;
Willy Tarreau59e0b0f2010-01-09 21:29:23 +0100[diff] [blame]752 rdr.size = sizeof(trash);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]753 memcpy(rdr.str, HTTP_302, rdr.len);
754
755 /* 2: add the server's prefix */
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]756 if (rdr.len + s->srv->rdr_len > rdr.size)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]757 return;
758
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]759 /* special prefix "/" means don't change URL */
760 if (s->srv->rdr_len != 1 || *s->srv->rdr_pfx != '/') {
761 memcpy(rdr.str + rdr.len, s->srv->rdr_pfx, s->srv->rdr_len);
762 rdr.len += s->srv->rdr_len;
763 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]764
765 /* 3: add the request URI */
766 txn = &s->txn;
767 path = http_get_path(txn);
768 if (!path)
769 return;
770
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]771 len = txn->req.sl.rq.u_l + (txn->req.sol + txn->req.sl.rq.u) - path;
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]772 if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]773 return;
774
775 memcpy(rdr.str + rdr.len, path, len);
776 rdr.len += len;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]777
778 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
779 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
780 rdr.len += 29;
781 } else {
782 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
783 rdr.len += 23;
784 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]785
786 /* prepare to return without error. */
Willy Tarreau99126c32008-11-27 10:30:51 +0100[diff] [blame]787 si->shutr(si);
788 si->shutw(si);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]789 si->err_type = SI_ET_NONE;
790 si->err_loc = NULL;
791 si->state = SI_ST_CLO;
792
793 /* send the message */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]794 http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]795
796 /* FIXME: we should increase a counter of redirects per server and per backend. */
797 if (s->srv)
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]798 srv_inc_sess_ctr(s->srv);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]799}
800
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]801/* Return the error message corresponding to si->err_type. It is assumed
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]802 * that the server side is closed. Note that err_type is actually a
803 * bitmask, where almost only aborts may be cumulated with other
804 * values. We consider that aborted operations are more important
805 * than timeouts or errors due to the fact that nobody else in the
806 * logs might explain incomplete retries. All others should avoid
807 * being cumulated. It should normally not be possible to have multiple
808 * aborts at once, but just in case, the first one in sequence is reported.
809 */
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]810void http_return_srv_error(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]811{
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]812 int err_type = si->err_type;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]813
814 if (err_type & SI_ET_QUEUE_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]815 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
816 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]817 else if (err_type & SI_ET_CONN_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]818 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
819 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]820 else if (err_type & SI_ET_QUEUE_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]821 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
822 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]823 else if (err_type & SI_ET_QUEUE_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]824 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q,
825 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]826 else if (err_type & SI_ET_CONN_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]827 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
828 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]829 else if (err_type & SI_ET_CONN_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]830 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
831 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]832 else /* SI_ET_CONN_OTHER and others */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]833 http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
834 500, error_message(s, HTTP_ERR_500));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]835}
836
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]837extern const char sess_term_cond[8];
838extern const char sess_fin_state[8];
839extern const char *monthname[12];
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]840const char sess_cookie[8] = "NIDVEO67"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie, Expired cookie, Old cookie, unknown */
841const char sess_set_cookie[8] = "NPDIRU67"; /* No set-cookie, Set-cookie found and left unchanged (passive),
842 Set-cookie Deleted, Set-Cookie Inserted, Set-cookie Rewritten,
843 Set-cookie Updated, unknown, unknown */
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]844struct pool_head *pool2_requri;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]845struct pool_head *pool2_capture;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]846
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]847void http_sess_clflog(struct session *s)
848{
849 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
850 struct proxy *fe = s->fe;
851 struct proxy *be = s->be;
852 struct proxy *prx_log;
853 struct http_txn *txn = &s->txn;
854 int tolog, level, err;
855 char *uri, *h;
856 char *svid;
857 struct tm tm;
858 static char tmpline[MAX_SYSLOG_LEN];
859 int hdr;
860 size_t w;
861 int t_request;
862
863 prx_log = fe;
864 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]865 (s->req->cons->conn_retries != be->conn_retries) ||
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]866 txn->status >= 500;
867
868 if (s->cli_addr.ss_family == AF_INET)
869 inet_ntop(AF_INET,
870 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
871 pn, sizeof(pn));
872 else
873 inet_ntop(AF_INET6,
874 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
875 pn, sizeof(pn));
876
877 get_gmtime(s->logs.accept_date.tv_sec, &tm);
878
879 /* FIXME: let's limit ourselves to frontend logging for now. */
880 tolog = fe->to_log;
881
882 h = tmpline;
883
884 w = snprintf(h, sizeof(tmpline),
885 "%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
886 pn,
887 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
888 tm.tm_hour, tm.tm_min, tm.tm_sec);
889 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
890 goto trunc;
891 h += w;
892
893 if (h >= tmpline + sizeof(tmpline) - 4)
894 goto trunc;
895
896 *(h++) = ' ';
897 *(h++) = '\"';
898 uri = txn->uri ? txn->uri : "<BADREQ>";
899 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
900 '#', url_encode_map, uri);
901 *(h++) = '\"';
902
903 w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
904 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
905 goto trunc;
906 h += w;
907
908 if (h >= tmpline + sizeof(tmpline) - 9)
909 goto trunc;
910 memcpy(h, " \"-\" \"-\"", 8);
911 h += 8;
912
913 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
914 " %d %03d",
915 (s->cli_addr.ss_family == AF_INET) ?
916 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
917 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
918 (int)s->logs.accept_date.tv_usec/1000);
919 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
920 goto trunc;
921 h += w;
922
923 w = strlen(fe->id);
924 if (h >= tmpline + sizeof(tmpline) - 4 - w)
925 goto trunc;
926 *(h++) = ' ';
927 *(h++) = '\"';
928 memcpy(h, fe->id, w);
929 h += w;
930 *(h++) = '\"';
931
932 w = strlen(be->id);
933 if (h >= tmpline + sizeof(tmpline) - 4 - w)
934 goto trunc;
935 *(h++) = ' ';
936 *(h++) = '\"';
937 memcpy(h, be->id, w);
938 h += w;
939 *(h++) = '\"';
940
941 svid = (tolog & LW_SVID) ?
942 (s->data_source != DATA_SRC_STATS) ?
943 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
944
945 w = strlen(svid);
946 if (h >= tmpline + sizeof(tmpline) - 4 - w)
947 goto trunc;
948 *(h++) = ' ';
949 *(h++) = '\"';
950 memcpy(h, svid, w);
951 h += w;
952 *(h++) = '\"';
953
954 t_request = -1;
955 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
956 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
957 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
958 " %d %ld %ld %ld %ld",
959 t_request,
960 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
961 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
962 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
963 s->logs.t_close);
964 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
965 goto trunc;
966 h += w;
967
968 if (h >= tmpline + sizeof(tmpline) - 8)
969 goto trunc;
970 *(h++) = ' ';
971 *(h++) = '\"';
972 *(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
973 *(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
974 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
975 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
976 *(h++) = '\"';
977
978 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
979 " %d %d %d %d %d %ld %ld",
980 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]981 (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]982 s->logs.srv_queue_size, s->logs.prx_queue_size);
983
984 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
985 goto trunc;
986 h += w;
987
988 if (txn->cli_cookie) {
989 w = strlen(txn->cli_cookie);
990 if (h >= tmpline + sizeof(tmpline) - 4 - w)
991 goto trunc;
992 *(h++) = ' ';
993 *(h++) = '\"';
994 memcpy(h, txn->cli_cookie, w);
995 h += w;
996 *(h++) = '\"';
997 } else {
998 if (h >= tmpline + sizeof(tmpline) - 5)
999 goto trunc;
1000 memcpy(h, " \"-\"", 4);
1001 h += 4;
1002 }
1003
1004 if (txn->srv_cookie) {
1005 w = strlen(txn->srv_cookie);
1006 if (h >= tmpline + sizeof(tmpline) - 4 - w)
1007 goto trunc;
1008 *(h++) = ' ';
1009 *(h++) = '\"';
1010 memcpy(h, txn->srv_cookie, w);
1011 h += w;
1012 *(h++) = '\"';
1013 } else {
1014 if (h >= tmpline + sizeof(tmpline) - 5)
1015 goto trunc;
1016 memcpy(h, " \"-\"", 4);
1017 h += 4;
1018 }
1019
1020 if ((fe->to_log & LW_REQHDR) && txn->req.cap) {
1021 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1022 if (h >= sizeof (tmpline) + tmpline - 4)
1023 goto trunc;
Cyril Bonté7f2c5392010-03-13 15:15:07 +0100[diff] [blame]1024 if (txn->req.cap[hdr] != NULL) {
1025 *(h++) = ' ';
1026 *(h++) = '\"';
1027 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1028 '#', hdr_encode_map, txn->req.cap[hdr]);
1029 *(h++) = '\"';
1030 } else {
1031 memcpy(h, " \"-\"", 4);
1032 h += 4;
1033 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1034 }
1035 }
1036
1037 if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) {
1038 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1039 if (h >= sizeof (tmpline) + tmpline - 4)
1040 goto trunc;
Cyril Bonté7f2c5392010-03-13 15:15:07 +0100[diff] [blame]1041 if (txn->rsp.cap[hdr] != NULL) {
1042 *(h++) = ' ';
1043 *(h++) = '\"';
1044 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1045 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1046 *(h++) = '\"';
1047 } else {
1048 memcpy(h, " \"-\"", 4);
1049 h += 4;
1050 }
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1051 }
1052 }
1053
1054trunc:
1055 *h = '\0';
1056
1057 level = LOG_INFO;
1058 if (err && (fe->options2 & PR_O2_LOGERRORS))
1059 level = LOG_ERR;
1060
1061 send_log(prx_log, level, "%s\n", tmpline);
1062
1063 s->logs.logwait = 0;
1064}
1065
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1066/*
1067 * send a log for the session when we have enough info about it.
1068 * Will not log if the frontend has no log defined.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1069 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]1070void http_sess_log(struct session *s)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1071{
1072 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
1073 struct proxy *fe = s->fe;
1074 struct proxy *be = s->be;
1075 struct proxy *prx_log;
1076 struct http_txn *txn = &s->txn;
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1077 int tolog, level, err;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1078 char *uri, *h;
1079 char *svid;
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1080 struct tm tm;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1081 static char tmpline[MAX_SYSLOG_LEN];
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1082 int t_request;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1083 int hdr;
1084
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1085 /* if we don't want to log normal traffic, return now */
1086 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]1087 (s->req->cons->conn_retries != be->conn_retries) ||
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1088 txn->status >= 500;
1089 if (!err && (fe->options2 & PR_O2_NOLOGNORM))
1090 return;
1091
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1092 if (fe->logfac1 < 0 && fe->logfac2 < 0)
1093 return;
1094 prx_log = fe;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1095
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1096 if (prx_log->options2 & PR_O2_CLFLOG)
1097 return http_sess_clflog(s);
1098
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1099 if (s->cli_addr.ss_family == AF_INET)
1100 inet_ntop(AF_INET,
1101 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
1102 pn, sizeof(pn));
1103 else
1104 inet_ntop(AF_INET6,
1105 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
1106 pn, sizeof(pn));
1107
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200[diff] [blame]1108 get_localtime(s->logs.accept_date.tv_sec, &tm);
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1109
1110 /* FIXME: let's limit ourselves to frontend logging for now. */
1111 tolog = fe->to_log;
1112
1113 h = tmpline;
1114 if (fe->to_log & LW_REQHDR &&
1115 txn->req.cap &&
1116 (h < tmpline + sizeof(tmpline) - 10)) {
1117 *(h++) = ' ';
1118 *(h++) = '{';
1119 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1120 if (hdr)
1121 *(h++) = '|';
1122 if (txn->req.cap[hdr] != NULL)
1123 h = encode_string(h, tmpline + sizeof(tmpline) - 7,
1124 '#', hdr_encode_map, txn->req.cap[hdr]);
1125 }
1126 *(h++) = '}';
1127 }
1128
1129 if (fe->to_log & LW_RSPHDR &&
1130 txn->rsp.cap &&
1131 (h < tmpline + sizeof(tmpline) - 7)) {
1132 *(h++) = ' ';
1133 *(h++) = '{';
1134 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1135 if (hdr)
1136 *(h++) = '|';
1137 if (txn->rsp.cap[hdr] != NULL)
1138 h = encode_string(h, tmpline + sizeof(tmpline) - 4,
1139 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1140 }
1141 *(h++) = '}';
1142 }
1143
1144 if (h < tmpline + sizeof(tmpline) - 4) {
1145 *(h++) = ' ';
1146 *(h++) = '"';
1147 uri = txn->uri ? txn->uri : "<BADREQ>";
1148 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
1149 '#', url_encode_map, uri);
1150 *(h++) = '"';
1151 }
1152 *h = '\0';
1153
1154 svid = (tolog & LW_SVID) ?
1155 (s->data_source != DATA_SRC_STATS) ?
1156 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
1157
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1158 t_request = -1;
1159 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
1160 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
1161
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1162 level = LOG_INFO;
1163 if (err && (fe->options2 & PR_O2_LOGERRORS))
1164 level = LOG_ERR;
1165
1166 send_log(prx_log, level,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1167 "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1168 " %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld"
1169 " %s %s %c%c%c%c %d/%d/%d/%d/%s%u %ld/%ld%s\n",
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1170 pn,
1171 (s->cli_addr.ss_family == AF_INET) ?
1172 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
1173 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1174 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1175 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]1176 fe->id, be->id, svid,
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1177 t_request,
1178 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1179 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
1180 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
1181 (tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
1182 txn->status,
Willy Tarreau8b3977f2008-01-18 11:16:32 +0100[diff] [blame]1183 (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1184 txn->cli_cookie ? txn->cli_cookie : "-",
1185 txn->srv_cookie ? txn->srv_cookie : "-",
1186 sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
1187 sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
1188 (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
1189 (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-',
1190 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
Krzysztof Piotr Oledzki25b501a2008-01-06 16:36:16 +0100[diff] [blame]1191 (s->flags & SN_REDISP)?"+":"",
Willy Tarreauee28de02010-06-01 09:51:00 +0200[diff] [blame]1192 (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]1193 s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline);
1194
1195 s->logs.logwait = 0;
1196}
1197
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1198
1199/*
1200 * Capture headers from message starting at <som> according to header list
1201 * <cap_hdr>, and fill the <idx> structure appropriately.
1202 */
1203void capture_headers(char *som, struct hdr_idx *idx,
1204 char **cap, struct cap_hdr *cap_hdr)
1205{
1206 char *eol, *sol, *col, *sov;
1207 int cur_idx;
1208 struct cap_hdr *h;
1209 int len;
1210
1211 sol = som + hdr_idx_first_pos(idx);
1212 cur_idx = hdr_idx_first_idx(idx);
1213
1214 while (cur_idx) {
1215 eol = sol + idx->v[cur_idx].len;
1216
1217 col = sol;
1218 while (col < eol && *col != ':')
1219 col++;
1220
1221 sov = col + 1;
1222 while (sov < eol && http_is_lws[(unsigned char)*sov])
1223 sov++;
1224
1225 for (h = cap_hdr; h; h = h->next) {
1226 if ((h->namelen == col - sol) &&
1227 (strncasecmp(sol, h->name, h->namelen) == 0)) {
1228 if (cap[h->index] == NULL)
1229 cap[h->index] =
Willy Tarreaucf7f3202007-05-13 22:46:04 +0200[diff] [blame]1230 pool_alloc2(h->pool);
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1231
1232 if (cap[h->index] == NULL) {
1233 Alert("HTTP capture : out of memory.\n");
1234 continue;
1235 }
1236
1237 len = eol - sov;
1238 if (len > h->len)
1239 len = h->len;
1240
1241 memcpy(cap[h->index], sov, len);
1242 cap[h->index][len]=0;
1243 }
1244 }
1245 sol = eol + idx->v[cur_idx].cr + 1;
1246 cur_idx = idx->v[cur_idx].next;
1247 }
1248}
1249
1250
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1251/* either we find an LF at <ptr> or we jump to <bad>.
1252 */
1253#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
1254
1255/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
1256 * otherwise to <http_msg_ood> with <state> set to <st>.
1257 */
1258#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
1259 ptr++; \
1260 if (likely(ptr < end)) \
1261 goto good; \
1262 else { \
1263 state = (st); \
1264 goto http_msg_ood; \
1265 } \
1266 } while (0)
1267
1268
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1269/*
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1270 * This function parses a status line between <ptr> and <end>, starting with
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1271 * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
1272 * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
1273 * will give undefined results.
1274 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1275 * and that msg->sol points to the beginning of the response.
1276 * If a complete line is found (which implies that at least one CR or LF is
1277 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1278 * returned indicating an incomplete line (which does not mean that parts have
1279 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1280 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1281 * upon next call.
1282 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1283 * This function was intentionally designed to be called from
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1284 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1285 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1286 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1287 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1288const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
1289 unsigned int state, const char *ptr, const char *end,
1290 char **ret_ptr, unsigned int *ret_state)
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1291{
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1292 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1293 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1294 http_msg_rpver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1295 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1296 EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
1297
1298 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1299 msg->sl.st.v_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1300 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1301 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1302 state = HTTP_MSG_ERROR;
1303 break;
1304
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1305 case HTTP_MSG_RPVER_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1306 http_msg_rpver_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1307 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1308 msg->sl.st.c = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1309 goto http_msg_rpcode;
1310 }
1311 if (likely(HTTP_IS_SPHT(*ptr)))
1312 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1313 /* so it's a CR/LF, this is invalid */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1314 state = HTTP_MSG_ERROR;
1315 break;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1316
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1317 case HTTP_MSG_RPCODE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1318 http_msg_rpcode:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1319 if (likely(!HTTP_IS_LWS(*ptr)))
1320 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
1321
1322 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1323 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1324 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1325 }
1326
1327 /* so it's a CR/LF, so there is no reason phrase */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1328 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1329 http_msg_rsp_reason:
1330 /* FIXME: should we support HTTP responses without any reason phrase ? */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1331 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1332 msg->sl.st.r_l = 0;
1333 goto http_msg_rpline_eol;
1334
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1335 case HTTP_MSG_RPCODE_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1336 http_msg_rpcode_sp:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1337 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1338 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1339 goto http_msg_rpreason;
1340 }
1341 if (likely(HTTP_IS_SPHT(*ptr)))
1342 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1343 /* so it's a CR/LF, so there is no reason phrase */
1344 goto http_msg_rsp_reason;
1345
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1346 case HTTP_MSG_RPREASON:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1347 http_msg_rpreason:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1348 if (likely(!HTTP_IS_CRLF(*ptr)))
1349 EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1350 msg->sl.st.r_l = (ptr - msg_buf) - msg->som - msg->sl.st.r;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1351 http_msg_rpline_eol:
1352 /* We have seen the end of line. Note that we do not
1353 * necessarily have the \n yet, but at least we know that we
1354 * have EITHER \r OR \n, otherwise the response would not be
1355 * complete. We can then record the response length and return
1356 * to the caller which will be able to register it.
1357 */
1358 msg->sl.st.l = ptr - msg->sol;
1359 return ptr;
1360
1361#ifdef DEBUG_FULL
1362 default:
1363 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1364 exit(1);
1365#endif
1366 }
1367
1368 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1369 /* out of valid data */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1370 if (ret_state)
1371 *ret_state = state;
1372 if (ret_ptr)
1373 *ret_ptr = (char *)ptr;
1374 return NULL;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1375}
1376
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1377/*
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1378 * This function parses a request line between <ptr> and <end>, starting with
1379 * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
1380 * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
1381 * will give undefined results.
1382 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1383 * and that msg->sol points to the beginning of the request.
1384 * If a complete line is found (which implies that at least one CR or LF is
1385 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1386 * returned indicating an incomplete line (which does not mean that parts have
1387 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1388 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1389 * upon next call.
1390 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1391 * This function was intentionally designed to be called from
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1392 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1393 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1394 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1395 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1396const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
1397 unsigned int state, const char *ptr, const char *end,
1398 char **ret_ptr, unsigned int *ret_state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1399{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1400 switch (state) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1401 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1402 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1403 if (likely(HTTP_IS_TOKEN(*ptr)))
1404 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1405
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1406 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1407 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1408 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1409 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1410
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1411 if (likely(HTTP_IS_CRLF(*ptr))) {
1412 /* HTTP 0.9 request */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1413 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1414 http_msg_req09_uri:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1415 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1416 http_msg_req09_uri_e:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1417 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1418 http_msg_req09_ver:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1419 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1420 msg->sl.rq.v_l = 0;
1421 goto http_msg_rqline_eol;
1422 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1423 state = HTTP_MSG_ERROR;
1424 break;
1425
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1426 case HTTP_MSG_RQMETH_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1427 http_msg_rqmeth_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1428 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1429 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1430 goto http_msg_rquri;
1431 }
1432 if (likely(HTTP_IS_SPHT(*ptr)))
1433 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1434 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1435 goto http_msg_req09_uri;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1436
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1437 case HTTP_MSG_RQURI:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1438 http_msg_rquri:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1439 if (likely(!HTTP_IS_LWS(*ptr)))
1440 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1441
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1442 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1443 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1444 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1445 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1446
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1447 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1448 goto http_msg_req09_uri_e;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1449
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1450 case HTTP_MSG_RQURI_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1451 http_msg_rquri_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1452 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1453 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1454 goto http_msg_rqver;
1455 }
1456 if (likely(HTTP_IS_SPHT(*ptr)))
1457 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1458 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1459 goto http_msg_req09_ver;
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_RQVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1462 http_msg_rqver:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1463 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1464 EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1465
1466 if (likely(HTTP_IS_CRLF(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1467 msg->sl.rq.v_l = (ptr - msg_buf) - msg->som - msg->sl.rq.v;
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1468 http_msg_rqline_eol:
1469 /* We have seen the end of line. Note that we do not
1470 * necessarily have the \n yet, but at least we know that we
1471 * have EITHER \r OR \n, otherwise the request would not be
1472 * complete. We can then record the request length and return
1473 * to the caller which will be able to register it.
1474 */
1475 msg->sl.rq.l = ptr - msg->sol;
1476 return ptr;
1477 }
1478
1479 /* neither an HTTP_VER token nor a CRLF */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1480 state = HTTP_MSG_ERROR;
1481 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1482
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1483#ifdef DEBUG_FULL
1484 default:
1485 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1486 exit(1);
1487#endif
1488 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1489
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1490 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1491 /* out of valid data */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1492 if (ret_state)
1493 *ret_state = state;
1494 if (ret_ptr)
1495 *ret_ptr = (char *)ptr;
1496 return NULL;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1497}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1498
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1499/*
1500 * Returns the data from Authorization header. Function may be called more
1501 * than once so data is stored in txn->auth_data. When no header is found
1502 * or auth method is unknown auth_method is set to HTTP_AUTH_WRONG to avoid
1503 * searching again for something we are unable to find anyway.
1504 */
1505
1506char get_http_auth_buff[BUFSIZE];
1507
1508int
1509get_http_auth(struct session *s)
1510{
1511
1512 struct http_txn *txn = &s->txn;
1513 struct chunk auth_method;
1514 struct hdr_ctx ctx;
1515 char *h, *p;
1516 int len;
1517
1518#ifdef DEBUG_AUTH
1519 printf("Auth for session %p: %d\n", s, txn->auth.method);
1520#endif
1521
1522 if (txn->auth.method == HTTP_AUTH_WRONG)
1523 return 0;
1524
1525 if (txn->auth.method)
1526 return 1;
1527
1528 txn->auth.method = HTTP_AUTH_WRONG;
1529
1530 ctx.idx = 0;
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]1531
1532 if (txn->flags & TX_USE_PX_CONN) {
1533 h = "Proxy-Authorization";
1534 len = strlen(h);
1535 } else {
1536 h = "Authorization";
1537 len = strlen(h);
1538 }
1539
1540 if (!http_find_header2(h, len, txn->req.sol, &txn->hdr_idx, &ctx))
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1541 return 0;
1542
1543 h = ctx.line + ctx.val;
1544
1545 p = memchr(h, ' ', ctx.vlen);
1546 if (!p || p == h)
1547 return 0;
1548
1549 chunk_initlen(&auth_method, h, 0, p-h);
1550 chunk_initlen(&txn->auth.method_data, p+1, 0, ctx.vlen-(p-h)-1);
1551
1552 if (!strncasecmp("Basic", auth_method.str, auth_method.len)) {
1553
1554 len = base64dec(txn->auth.method_data.str, txn->auth.method_data.len,
1555 get_http_auth_buff, BUFSIZE - 1);
1556
1557 if (len < 0)
1558 return 0;
1559
1560
1561 get_http_auth_buff[len] = '\0';
1562
1563 p = strchr(get_http_auth_buff, ':');
1564
1565 if (!p)
1566 return 0;
1567
1568 txn->auth.user = get_http_auth_buff;
1569 *p = '\0';
1570 txn->auth.pass = p+1;
1571
1572 txn->auth.method = HTTP_AUTH_BASIC;
1573 return 1;
1574 }
1575
1576 return 0;
1577}
1578
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1579
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1580/*
1581 * This function parses an HTTP message, either a request or a response,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1582 * depending on the initial msg->msg_state. It can be preempted everywhere
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1583 * when data are missing and recalled at the exact same location with no
1584 * information loss. The header index is re-initialized when switching from
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1585 * 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]1586 * fields. Note that msg->som and msg->sol will be initialized after completing
1587 * the first state, so that none of the msg pointers has to be initialized
1588 * prior to the first call.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1589 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1590void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx)
1591{
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1592 unsigned int state; /* updated only when leaving the FSM */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1593 register char *ptr, *end; /* request pointers, to avoid dereferences */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1594
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1595 state = msg->msg_state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1596 ptr = buf->lr;
1597 end = buf->r;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1598
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1599 if (unlikely(ptr >= end))
1600 goto http_msg_ood;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1601
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1602 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1603 /*
1604 * First, states that are specific to the response only.
1605 * We check them first so that request and headers are
1606 * closer to each other (accessed more often).
1607 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1608 case HTTP_MSG_RPBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1609 http_msg_rpbefore:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1610 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1611 /* we have a start of message, but we have to check
1612 * first if we need to remove some CRLF. We can only
1613 * do this when send_max=0.
1614 */
1615 char *beg = buf->w + buf->send_max;
1616 if (beg >= buf->data + buf->size)
1617 beg -= buf->size;
1618 if (unlikely(ptr != beg)) {
1619 if (buf->send_max)
1620 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1621 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1622 buffer_ignore(buf, ptr - beg);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1623 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1624 msg->som = ptr - buf->data;
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1625 msg->sol = ptr;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1626 hdr_idx_init(idx);
1627 state = HTTP_MSG_RPVER;
1628 goto http_msg_rpver;
1629 }
1630
1631 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1632 goto http_msg_invalid;
1633
1634 if (unlikely(*ptr == '\n'))
1635 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1636 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1637 /* stop here */
1638
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1639 case HTTP_MSG_RPBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1640 http_msg_rpbefore_cr:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1641 EXPECT_LF_HERE(ptr, http_msg_invalid);
1642 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1643 /* stop here */
1644
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1645 case HTTP_MSG_RPVER:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1646 http_msg_rpver:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1647 case HTTP_MSG_RPVER_SP:
1648 case HTTP_MSG_RPCODE:
1649 case HTTP_MSG_RPCODE_SP:
1650 case HTTP_MSG_RPREASON:
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1651 ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1652 &buf->lr, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1653 if (unlikely(!ptr))
1654 return;
1655
1656 /* we have a full response and we know that we have either a CR
1657 * or an LF at <ptr>.
1658 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1659 //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]1660 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1661
1662 msg->sol = ptr;
1663 if (likely(*ptr == '\r'))
1664 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1665 goto http_msg_rpline_end;
1666
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1667 case HTTP_MSG_RPLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1668 http_msg_rpline_end:
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1669 /* msg->sol must point to the first of CR or LF. */
1670 EXPECT_LF_HERE(ptr, http_msg_invalid);
1671 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1672 /* stop here */
1673
1674 /*
1675 * Second, states that are specific to the request only
1676 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1677 case HTTP_MSG_RQBEFORE:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1678 http_msg_rqbefore:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1679 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1680 /* we have a start of message, but we have to check
1681 * first if we need to remove some CRLF. We can only
1682 * do this when send_max=0.
1683 */
1684 char *beg = buf->w + buf->send_max;
1685 if (beg >= buf->data + buf->size)
1686 beg -= buf->size;
1687 if (likely(ptr != beg)) {
1688 if (buf->send_max)
1689 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1690 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1691 buffer_ignore(buf, ptr - beg);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1692 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1693 msg->som = ptr - buf->data;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1694 msg->sol = ptr;
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1695 /* we will need this when keep-alive will be supported
1696 hdr_idx_init(idx);
1697 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1698 state = HTTP_MSG_RQMETH;
1699 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1700 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1701
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1702 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1703 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1704
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1705 if (unlikely(*ptr == '\n'))
1706 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1707 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1708 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1709
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1710 case HTTP_MSG_RQBEFORE_CR:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1711 http_msg_rqbefore_cr:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1712 EXPECT_LF_HERE(ptr, http_msg_invalid);
1713 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1714 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1715
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1716 case HTTP_MSG_RQMETH:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1717 http_msg_rqmeth:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1718 case HTTP_MSG_RQMETH_SP:
1719 case HTTP_MSG_RQURI:
1720 case HTTP_MSG_RQURI_SP:
1721 case HTTP_MSG_RQVER:
1722 ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1723 &buf->lr, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1724 if (unlikely(!ptr))
1725 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1726
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1727 /* we have a full request and we know that we have either a CR
1728 * or an LF at <ptr>.
1729 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1730 //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]1731 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1732
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1733 msg->sol = ptr;
1734 if (likely(*ptr == '\r'))
1735 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1736 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1737
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1738 case HTTP_MSG_RQLINE_END:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1739 http_msg_rqline_end:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1740 /* check for HTTP/0.9 request : no version information available.
1741 * msg->sol must point to the first of CR or LF.
1742 */
1743 if (unlikely(msg->sl.rq.v_l == 0))
1744 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1745
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1746 EXPECT_LF_HERE(ptr, http_msg_invalid);
1747 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1748 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1749
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1750 /*
1751 * Common states below
1752 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1753 case HTTP_MSG_HDR_FIRST:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1754 http_msg_hdr_first:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1755 msg->sol = ptr;
1756 if (likely(!HTTP_IS_CRLF(*ptr))) {
1757 goto http_msg_hdr_name;
1758 }
1759
1760 if (likely(*ptr == '\r'))
1761 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1762 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1763
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1764 case HTTP_MSG_HDR_NAME:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1765 http_msg_hdr_name:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1766 /* assumes msg->sol points to the first char */
1767 if (likely(HTTP_IS_TOKEN(*ptr)))
1768 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1769
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1770 if (likely(*ptr == ':')) {
1771 msg->col = ptr - buf->data;
1772 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
1773 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1774
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1775 if (likely(msg->err_pos < -1) || *ptr == '\n')
1776 goto http_msg_invalid;
1777
1778 if (msg->err_pos == -1) /* capture error pointer */
1779 msg->err_pos = ptr - buf->data; /* >= 0 now */
1780
1781 /* and we still accept this non-token character */
1782 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1783
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1784 case HTTP_MSG_HDR_L1_SP:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1785 http_msg_hdr_l1_sp:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1786 /* assumes msg->sol points to the first char and msg->col to the colon */
1787 if (likely(HTTP_IS_SPHT(*ptr)))
1788 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]1789
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1790 /* header value can be basically anything except CR/LF */
1791 msg->sov = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1792
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1793 if (likely(!HTTP_IS_CRLF(*ptr))) {
1794 goto http_msg_hdr_val;
1795 }
1796
1797 if (likely(*ptr == '\r'))
1798 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1799 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1800
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1801 case HTTP_MSG_HDR_L1_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1802 http_msg_hdr_l1_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1803 EXPECT_LF_HERE(ptr, http_msg_invalid);
1804 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]1805
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1806 case HTTP_MSG_HDR_L1_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1807 http_msg_hdr_l1_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1808 if (likely(HTTP_IS_SPHT(*ptr))) {
1809 /* replace HT,CR,LF with spaces */
1810 for (; buf->data+msg->sov < ptr; msg->sov++)
1811 buf->data[msg->sov] = ' ';
1812 goto http_msg_hdr_l1_sp;
1813 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1814 /* we had a header consisting only in spaces ! */
1815 msg->eol = buf->data + msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1816 goto http_msg_complete_header;
1817
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1818 case HTTP_MSG_HDR_VAL:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1819 http_msg_hdr_val:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1820 /* assumes msg->sol points to the first char, msg->col to the
1821 * colon, and msg->sov points to the first character of the
1822 * value.
1823 */
1824 if (likely(!HTTP_IS_CRLF(*ptr)))
1825 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1826
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1827 msg->eol = ptr;
1828 /* Note: we could also copy eol into ->eoh so that we have the
1829 * real header end in case it ends with lots of LWS, but is this
1830 * really needed ?
1831 */
1832 if (likely(*ptr == '\r'))
1833 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1834 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1835
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1836 case HTTP_MSG_HDR_L2_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1837 http_msg_hdr_l2_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1838 EXPECT_LF_HERE(ptr, http_msg_invalid);
1839 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]1840
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1841 case HTTP_MSG_HDR_L2_LWS:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1842 http_msg_hdr_l2_lws:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1843 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1844 /* LWS: replace HT,CR,LF with spaces */
1845 for (; msg->eol < ptr; msg->eol++)
1846 *msg->eol = ' ';
1847 goto http_msg_hdr_val;
1848 }
1849 http_msg_complete_header:
1850 /*
1851 * It was a new header, so the last one is finished.
1852 * Assumes msg->sol points to the first char, msg->col to the
1853 * colon, msg->sov points to the first character of the value
1854 * and msg->eol to the first CR or LF so we know how the line
1855 * ends. We insert last header into the index.
1856 */
1857 /*
1858 fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
1859 write(2, msg->sol, msg->eol-msg->sol);
1860 fprintf(stderr,"\n");
1861 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1862
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1863 if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
1864 idx, idx->tail) < 0))
1865 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1866
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1867 msg->sol = ptr;
1868 if (likely(!HTTP_IS_CRLF(*ptr))) {
1869 goto http_msg_hdr_name;
1870 }
1871
1872 if (likely(*ptr == '\r'))
1873 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1874 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1875
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1876 case HTTP_MSG_LAST_LF:
Willy Tarreaue3f284a2010-09-28 19:42:42 +0200[diff] [blame]1877 http_msg_last_lf:
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1878 /* Assumes msg->sol points to the first of either CR or LF */
1879 EXPECT_LF_HERE(ptr, http_msg_invalid);
1880 ptr++;
1881 buf->lr = ptr;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1882 msg->col = msg->sov = buf->lr - buf->data;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1883 msg->eoh = msg->sol - buf->data;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1884 msg->sol = buf->data + msg->som;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1885 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1886 return;
1887#ifdef DEBUG_FULL
1888 default:
1889 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1890 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1891#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1892 }
1893 http_msg_ood:
1894 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1895 msg->msg_state = state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1896 buf->lr = ptr;
1897 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1898
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1899 http_msg_invalid:
1900 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1901 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1902 buf->lr = ptr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1903 return;
1904}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1905
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1906/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1907 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1908 * nothing is done and 1 is returned.
1909 */
1910static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
1911{
1912 int delta;
1913 char *cur_end;
1914
1915 if (msg->sl.rq.v_l != 0)
1916 return 1;
1917
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1918 cur_end = msg->sol + msg->sl.rq.l;
1919 delta = 0;
1920
1921 if (msg->sl.rq.u_l == 0) {
1922 /* if no URI was set, add "/" */
1923 delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
1924 cur_end += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1925 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1926 }
1927 /* add HTTP version */
1928 delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1929 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1930 cur_end += delta;
1931 cur_end = (char *)http_parse_reqline(msg, req->data,
1932 HTTP_MSG_RQMETH,
1933 msg->sol, cur_end + 1,
1934 NULL, NULL);
1935 if (unlikely(!cur_end))
1936 return 0;
1937
1938 /* we have a full HTTP/1.0 request now and we know that
1939 * we have either a CR or an LF at <ptr>.
1940 */
1941 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1942 return 1;
1943}
1944
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1945/* Parse the Connection: header of an HTTP request, looking for both "close"
1946 * and "keep-alive" values. If a buffer is provided and we already know that
1947 * some headers may safely be removed, we remove them now. The <to_del> flags
1948 * are used for that :
1949 * - bit 0 means remove "close" headers (in HTTP/1.0 requests/responses)
1950 * - bit 1 means remove "keep-alive" headers (in HTTP/1.1 reqs/resp to 1.1).
1951 * The TX_HDR_CONN_* flags are adjusted in txn->flags depending on what was
1952 * found, and TX_CON_*_SET is adjusted depending on what is left so only
1953 * harmless combinations may be removed. Do not call that after changes have
1954 * been processed. If unused, the buffer can be NULL, and no data will be
1955 * changed.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1956 */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1957void 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]1958{
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1959 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1960 const char *hdr_val = "Connection";
1961 int hdr_len = 10;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1962
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1963 if (txn->flags & TX_HDR_CONN_PRS)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1964 return;
1965
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1966 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1967 hdr_val = "Proxy-Connection";
1968 hdr_len = 16;
1969 }
1970
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1971 ctx.idx = 0;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1972 txn->flags &= ~(TX_CON_KAL_SET|TX_CON_CLO_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1973 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1974 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
1975 txn->flags |= TX_HDR_CONN_KAL;
1976 if ((to_del & 2) && buf)
1977 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
1978 else
1979 txn->flags |= TX_CON_KAL_SET;
1980 }
1981 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
1982 txn->flags |= TX_HDR_CONN_CLO;
1983 if ((to_del & 1) && buf)
1984 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
1985 else
1986 txn->flags |= TX_CON_CLO_SET;
1987 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1988 }
1989
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1990 txn->flags |= TX_HDR_CONN_PRS;
1991 return;
1992}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1993
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1994/* Apply desired changes on the Connection: header. Values may be removed and/or
1995 * added depending on the <wanted> flags, which are exclusively composed of
1996 * TX_CON_CLO_SET and TX_CON_KAL_SET, depending on what flags are desired. The
1997 * TX_CON_*_SET flags are adjusted in txn->flags depending on what is left.
1998 */
1999void http_change_connection_header(struct http_txn *txn, struct http_msg *msg, struct buffer *buf, int wanted)
2000{
2001 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2002 const char *hdr_val = "Connection";
2003 int hdr_len = 10;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2004
2005 ctx.idx = 0;
2006
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2007
2008 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2009 hdr_val = "Proxy-Connection";
2010 hdr_len = 16;
2011 }
2012
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2013 txn->flags &= ~(TX_CON_CLO_SET | TX_CON_KAL_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2014 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2015 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
2016 if (wanted & TX_CON_KAL_SET)
2017 txn->flags |= TX_CON_KAL_SET;
2018 else
2019 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2020 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2021 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
2022 if (wanted & TX_CON_CLO_SET)
2023 txn->flags |= TX_CON_CLO_SET;
2024 else
2025 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2026 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2027 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2028
2029 if (wanted == (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
2030 return;
2031
2032 if ((wanted & TX_CON_CLO_SET) && !(txn->flags & TX_CON_CLO_SET)) {
2033 txn->flags |= TX_CON_CLO_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2034 hdr_val = "Connection: close";
2035 hdr_len = 17;
2036 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2037 hdr_val = "Proxy-Connection: close";
2038 hdr_len = 23;
2039 }
2040 http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2041 }
2042
2043 if ((wanted & TX_CON_KAL_SET) && !(txn->flags & TX_CON_KAL_SET)) {
2044 txn->flags |= TX_CON_KAL_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2045 hdr_val = "Connection: keep-alive";
2046 hdr_len = 22;
2047 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2048 hdr_val = "Proxy-Connection: keep-alive";
2049 hdr_len = 28;
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 return;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2054}
2055
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2056/* Parse the chunk size at buf->lr. Once done, it adjusts ->lr to point to the
2057 * first byte of body, and increments msg->sov by the number of bytes parsed,
2058 * so that we know we can forward between ->som and ->sov. Note that due to
2059 * possible wrapping at the end of the buffer, it is possible that msg->sov is
2060 * lower than msg->som.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2061 * Return >0 on success, 0 when some data is missing, <0 on error.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2062 * 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]2063 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2064int http_parse_chunk_size(struct buffer *buf, struct http_msg *msg)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2065{
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2066 char *ptr = buf->lr;
2067 char *end = buf->data + buf->size;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2068 unsigned int chunk = 0;
2069
2070 /* The chunk size is in the following form, though we are only
2071 * interested in the size and CRLF :
2072 * 1*HEXDIGIT *WSP *[ ';' extensions ] CRLF
2073 */
2074 while (1) {
2075 int c;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2076 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2077 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2078 c = hex2i(*ptr);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2079 if (c < 0) /* not a hex digit anymore */
2080 break;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2081 if (++ptr >= end)
2082 ptr = buf->data;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2083 if (chunk & 0xF000000) /* overflow will occur */
2084 return -1;
2085 chunk = (chunk << 4) + c;
2086 }
2087
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2088 /* empty size not allowed */
2089 if (ptr == buf->lr)
2090 return -1;
2091
2092 while (http_is_spht[(unsigned char)*ptr]) {
2093 if (++ptr >= end)
2094 ptr = buf->data;
2095 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2096 return 0;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2097 }
2098
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2099 /* Up to there, we know that at least one byte is present at *ptr. Check
2100 * for the end of chunk size.
2101 */
2102 while (1) {
2103 if (likely(HTTP_IS_CRLF(*ptr))) {
2104 /* we now have a CR or an LF at ptr */
2105 if (likely(*ptr == '\r')) {
2106 if (++ptr >= end)
2107 ptr = buf->data;
2108 if (ptr == buf->r)
2109 return 0;
2110 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2111
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2112 if (*ptr != '\n')
2113 return -1;
2114 if (++ptr >= end)
2115 ptr = buf->data;
2116 /* done */
2117 break;
2118 }
2119 else if (*ptr == ';') {
2120 /* chunk extension, ends at next CRLF */
2121 if (++ptr >= end)
2122 ptr = buf->data;
2123 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2124 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2125
2126 while (!HTTP_IS_CRLF(*ptr)) {
2127 if (++ptr >= end)
2128 ptr = buf->data;
2129 if (ptr == buf->r)
2130 return 0;
2131 }
2132 /* we have a CRLF now, loop above */
2133 continue;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2134 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2135 else
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2136 return -1;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2137 }
2138
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2139 /* OK we found our CRLF and now <ptr> points to the next byte,
2140 * which may or may not be present. We save that into ->lr and
2141 * ->sov.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2142 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2143 msg->sov += ptr - buf->lr;
2144 buf->lr = ptr;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2145 msg->hdr_content_len = chunk;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2146 msg->msg_state = chunk ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2147 return 1;
2148}
2149
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2150/* This function skips trailers in the buffer <buf> associated with HTTP
2151 * message <msg>. The first visited position is buf->lr. If the end of
2152 * the trailers is found, it is automatically scheduled to be forwarded,
2153 * msg->msg_state switches to HTTP_MSG_DONE, and the function returns >0.
2154 * If not enough data are available, the function does not change anything
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2155 * except maybe buf->lr and msg->sov if it could parse some lines, and returns
2156 * zero. If a parse error is encountered, the function returns < 0 and does not
2157 * change anything except maybe buf->lr and msg->sov. Note that the message
2158 * must already be in HTTP_MSG_TRAILERS state before calling this function,
2159 * which implies that all non-trailers data have already been scheduled for
2160 * forwarding, and that the difference between msg->som and msg->sov exactly
2161 * matches the length of trailers already parsed and not forwarded. It is also
2162 * important to note that this function is designed to be able to parse wrapped
2163 * headers at end of buffer.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2164 */
2165int http_forward_trailers(struct buffer *buf, struct http_msg *msg)
2166{
2167 /* we have buf->lr which points to next line. Look for CRLF. */
2168 while (1) {
2169 char *p1 = NULL, *p2 = NULL;
2170 char *ptr = buf->lr;
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2171 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2172
2173 /* scan current line and stop at LF or CRLF */
2174 while (1) {
2175 if (ptr == buf->r)
2176 return 0;
2177
2178 if (*ptr == '\n') {
2179 if (!p1)
2180 p1 = ptr;
2181 p2 = ptr;
2182 break;
2183 }
2184
2185 if (*ptr == '\r') {
2186 if (p1)
2187 return -1;
2188 p1 = ptr;
2189 }
2190
2191 ptr++;
2192 if (ptr >= buf->data + buf->size)
2193 ptr = buf->data;
2194 }
2195
2196 /* after LF; point to beginning of next line */
2197 p2++;
2198 if (p2 >= buf->data + buf->size)
2199 p2 = buf->data;
2200
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2201 bytes = p2 - buf->lr;
2202 if (bytes < 0)
2203 bytes += buf->size;
2204
2205 /* schedule this line for forwarding */
2206 msg->sov += bytes;
2207 if (msg->sov >= buf->size)
2208 msg->sov -= buf->size;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2209
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2210 if (p1 == buf->lr) {
2211 /* LF/CRLF at beginning of line => end of trailers at p2.
2212 * Everything was scheduled for forwarding, there's nothing
2213 * left from this message.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]2214 */
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2215 buf->lr = p2;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2216 msg->msg_state = HTTP_MSG_DONE;
2217 return 1;
2218 }
2219 /* OK, next line then */
2220 buf->lr = p2;
2221 }
2222}
2223
2224/* This function may be called only in HTTP_MSG_DATA_CRLF. It reads the CRLF or
2225 * a possible LF alone at the end of a chunk. It automatically adjusts msg->sov,
2226 * ->som, buf->lr in order to include this part into the next forwarding phase.
2227 * It also sets msg_state to HTTP_MSG_CHUNK_SIZE and returns >0 on success. If
2228 * not enough data are available, the function does not change anything and
2229 * returns zero. If a parse error is encountered, the function returns < 0 and
2230 * does not change anything. Note: this function is designed to parse wrapped
2231 * CRLF at the end of the buffer.
2232 */
2233int http_skip_chunk_crlf(struct buffer *buf, struct http_msg *msg)
2234{
2235 char *ptr;
2236 int bytes;
2237
2238 /* NB: we'll check data availabilty at the end. It's not a
2239 * problem because whatever we match first will be checked
2240 * against the correct length.
2241 */
2242 bytes = 1;
2243 ptr = buf->lr;
2244 if (*ptr == '\r') {
2245 bytes++;
2246 ptr++;
2247 if (ptr >= buf->data + buf->size)
2248 ptr = buf->data;
2249 }
2250
Willy Tarreaubf3f1de2010-03-17 15:54:24 +0100[diff] [blame]2251 if (bytes > buf->l - buf->send_max)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2252 return 0;
2253
2254 if (*ptr != '\n')
2255 return -1;
2256
2257 ptr++;
2258 if (ptr >= buf->data + buf->size)
2259 ptr = buf->data;
2260 buf->lr = ptr;
2261 /* prepare the CRLF to be forwarded. msg->som may be before data but we don't care */
2262 msg->sov = ptr - buf->data;
2263 msg->som = msg->sov - bytes;
2264 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
2265 return 1;
2266}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2267
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2268void http_buffer_heavy_realign(struct buffer *buf, struct http_msg *msg)
2269{
2270 char *end = buf->data + buf->size;
2271 int off = buf->data + buf->size - buf->w;
2272
2273 /* two possible cases :
2274 * - the buffer is in one contiguous block, we move it in-place
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2275 * - the buffer is in two blocks, we move it via the swap_buffer
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2276 */
2277 if (buf->l) {
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2278 int block1 = buf->l;
2279 int block2 = 0;
2280 if (buf->r <= buf->w) {
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2281 /* non-contiguous block */
Willy Tarreau8096de92010-02-26 11:12:27 +0100[diff] [blame]2282 block1 = buf->data + buf->size - buf->w;
2283 block2 = buf->r - buf->data;
2284 }
2285 if (block2)
2286 memcpy(swap_buffer, buf->data, block2);
2287 memmove(buf->data, buf->w, block1);
2288 if (block2)
2289 memcpy(buf->data + block1, swap_buffer, block2);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2290 }
2291
2292 /* adjust all known pointers */
2293 buf->w = buf->data;
2294 buf->lr += off; if (buf->lr >= end) buf->lr -= buf->size;
2295 buf->r += off; if (buf->r >= end) buf->r -= buf->size;
2296 msg->sol += off; if (msg->sol >= end) msg->sol -= buf->size;
2297 msg->eol += off; if (msg->eol >= end) msg->eol -= buf->size;
2298
2299 /* adjust relative pointers */
2300 msg->som = 0;
2301 msg->eoh += off; if (msg->eoh >= buf->size) msg->eoh -= buf->size;
2302 msg->col += off; if (msg->col >= buf->size) msg->col -= buf->size;
2303 msg->sov += off; if (msg->sov >= buf->size) msg->sov -= buf->size;
2304
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2305 if (msg->err_pos >= 0) {
2306 msg->err_pos += off;
2307 if (msg->err_pos >= buf->size)
2308 msg->err_pos -= buf->size;
2309 }
2310
2311 buf->flags &= ~BF_FULL;
2312 if (buf->l >= buffer_max_len(buf))
2313 buf->flags |= BF_FULL;
2314}
2315
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2316/* This stream analyser waits for a complete HTTP request. It returns 1 if the
2317 * processing can continue on next analysers, or zero if it either needs more
2318 * data or wants to immediately abort the request (eg: timeout, error, ...). It
2319 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
2320 * when it has nothing left to do, and may remove any analyser when it wants to
2321 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2322 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2323int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2324{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2325 /*
2326 * We will parse the partial (or complete) lines.
2327 * We will check the request syntax, and also join multi-line
2328 * headers. An index of all the lines will be elaborated while
2329 * parsing.
2330 *
2331 * For the parsing, we use a 28 states FSM.
2332 *
2333 * Here is the information we currently have :
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2334 * req->data + msg->som = beginning of request
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2335 * req->data + msg->eoh = end of processed headers / start of current one
2336 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2337 * req->lr = first non-visited byte
2338 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2339 *
2340 * At end of parsing, we may perform a capture of the error (if any), and
2341 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
2342 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
2343 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2344 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2345
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2346 int cur_idx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2347 int use_close_only;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2348 struct http_txn *txn = &s->txn;
2349 struct http_msg *msg = &txn->req;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2350 struct hdr_ctx ctx;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2351
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]2352 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2353 now_ms, __FUNCTION__,
2354 s,
2355 req,
2356 req->rex, req->wex,
2357 req->flags,
2358 req->l,
2359 req->analysers);
2360
Willy Tarreau52a0c602009-08-16 22:45:38 +0200[diff] [blame]2361 /* we're speaking HTTP here, so let's speak HTTP to the client */
2362 s->srv_error = http_return_srv_error;
2363
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2364 /* There's a protected area at the end of the buffer for rewriting
2365 * purposes. We don't want to start to parse the request if the
2366 * protected area is affected, because we may have to move processed
2367 * data later, which is much more complicated.
2368 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2369 if (req->l && msg->msg_state < HTTP_MSG_ERROR) {
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2370 if ((txn->flags & TX_NOT_FIRST) &&
2371 unlikely((req->flags & BF_FULL) ||
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2372 req->r < req->lr ||
2373 req->r > req->data + req->size - global.tune.maxrewrite)) {
2374 if (req->send_max) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2375 if (req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2376 goto failed_keep_alive;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2377 /* some data has still not left the buffer, wake us once that's done */
2378 buffer_dont_connect(req);
2379 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
2380 return 0;
2381 }
2382 if (req->l <= req->size - global.tune.maxrewrite)
2383 http_buffer_heavy_realign(req, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2384 }
2385
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2386 /* Note that we have the same problem with the response ; we
2387 * may want to send a redirect, error or anything which requires
2388 * some spare space. So we'll ensure that we have at least
2389 * maxrewrite bytes available in the response buffer before
2390 * processing that one. This will only affect pipelined
2391 * keep-alive requests.
2392 */
2393 if ((txn->flags & TX_NOT_FIRST) &&
2394 unlikely((s->rep->flags & BF_FULL) ||
2395 s->rep->r < s->rep->lr ||
2396 s->rep->r > s->rep->data + s->rep->size - global.tune.maxrewrite)) {
2397 if (s->rep->send_max) {
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]2398 if (s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
2399 goto failed_keep_alive;
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2400 /* don't let a connection request be initiated */
2401 buffer_dont_connect(req);
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2402 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2403 return 0;
2404 }
2405 }
2406
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2407 if (likely(req->lr < req->r))
2408 http_msg_analyzer(req, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2409 }
2410
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2411 /* 1: we might have to print this header in debug mode */
2412 if (unlikely((global.mode & MODE_DEBUG) &&
2413 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]2414 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2415 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2416 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2417
Willy Tarreau663308b2010-06-07 14:06:08 +0200[diff] [blame]2418 sol = req->data + msg->som;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2419 eol = sol + msg->sl.rq.l;
2420 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2421
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2422 sol += hdr_idx_first_pos(&txn->hdr_idx);
2423 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2424
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2425 while (cur_idx) {
2426 eol = sol + txn->hdr_idx.v[cur_idx].len;
2427 debug_hdr("clihdr", s, sol, eol);
2428 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2429 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2430 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2431 }
2432
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2433
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2434 /*
2435 * Now we quickly check if we have found a full valid request.
2436 * If not so, we check the FD and buffer states before leaving.
2437 * A full request is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2438 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2439 * requests are checked first. When waiting for a second request
2440 * on a keep-alive session, if we encounter and error, close, t/o,
2441 * we note the error in the session flags but don't set any state.
2442 * Since the error will be noted there, it will not be counted by
2443 * process_session() as a frontend error.
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2444 * Last, we may increase some tracked counters' http request errors on
2445 * the cases that are deliberately the client's fault. For instance,
2446 * a timeout or connection reset is not counted as an error. However
2447 * a bad request is.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2448 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2449
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2450 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2451 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2452 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2453 */
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2454 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2455 session_inc_http_req_ctr(s);
2456 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2457 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2458 goto return_bad_req;
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2459 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2460
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2461 /* 1: Since we are in header mode, if there's no space
2462 * left for headers, we won't be able to free more
2463 * later, so the session will never terminate. We
2464 * must terminate it now.
2465 */
2466 if (unlikely(req->flags & BF_FULL)) {
2467 /* FIXME: check if URI is set and return Status
2468 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2469 */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2470 session_inc_http_req_ctr(s);
2471 session_inc_http_err_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2472 proxy_inc_fe_req_ctr(s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2473 goto return_bad_req;
2474 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2475
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2476 /* 2: have we encountered a read error ? */
2477 else if (req->flags & BF_READ_ERROR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2478 if (!(s->flags & SN_ERR_MASK))
2479 s->flags |= SN_ERR_CLICL;
2480
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2481 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2482 goto failed_keep_alive;
2483
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2484 /* we cannot return any message on error */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2485 if (msg->err_pos >= 0) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2486 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2487 session_inc_http_err_ctr(s);
2488 }
2489
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2490 msg->msg_state = HTTP_MSG_ERROR;
2491 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2492
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2493 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2494 proxy_inc_fe_req_ctr(s->fe);
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2495 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2496 if (s->listener->counters)
2497 s->listener->counters->failed_req++;
2498
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2499 if (!(s->flags & SN_FINST_MASK))
2500 s->flags |= SN_FINST_R;
2501 return 0;
2502 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2503
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2504 /* 3: has the read timeout expired ? */
2505 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]2506 if (!(s->flags & SN_ERR_MASK))
2507 s->flags |= SN_ERR_CLITO;
2508
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2509 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2510 goto failed_keep_alive;
2511
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2512 /* read timeout : give up with an error message. */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2513 if (msg->err_pos >= 0) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2514 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2515 session_inc_http_err_ctr(s);
2516 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2517 txn->status = 408;
2518 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
2519 msg->msg_state = HTTP_MSG_ERROR;
2520 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2521
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2522 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2523 proxy_inc_fe_req_ctr(s->fe);
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2524 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2525 if (s->listener->counters)
2526 s->listener->counters->failed_req++;
2527
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2528 if (!(s->flags & SN_FINST_MASK))
2529 s->flags |= SN_FINST_R;
2530 return 0;
2531 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2532
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2533 /* 4: have we encountered a close ? */
2534 else if (req->flags & BF_SHUTR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2535 if (!(s->flags & SN_ERR_MASK))
2536 s->flags |= SN_ERR_CLICL;
2537
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2538 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2539 goto failed_keep_alive;
2540
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2541 if (msg->err_pos >= 0)
2542 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2543 txn->status = 400;
2544 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2545 msg->msg_state = HTTP_MSG_ERROR;
2546 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2547
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2548 session_inc_http_err_ctr(s);
2549 session_inc_http_req_ctr(s);
Willy Tarreau3e1b6d12010-03-04 23:02:38 +0100[diff] [blame]2550 proxy_inc_fe_req_ctr(s->fe);
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2551 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2552 if (s->listener->counters)
2553 s->listener->counters->failed_req++;
2554
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2555 if (!(s->flags & SN_FINST_MASK))
2556 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2557 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2558 }
2559
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2560 buffer_dont_connect(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2561 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2562 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2563
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2564 if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) {
2565 /* If the client starts to talk, let's fall back to
2566 * request timeout processing.
2567 */
2568 txn->flags &= ~TX_WAIT_NEXT_RQ;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2569 req->analyse_exp = TICK_ETERNITY;
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2570 }
2571
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2572 /* just set the request timeout once at the beginning of the request */
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2573 if (!tick_isset(req->analyse_exp)) {
2574 if ((msg->msg_state == HTTP_MSG_RQBEFORE) &&
2575 (txn->flags & TX_WAIT_NEXT_RQ) &&
2576 tick_isset(s->be->timeout.httpka))
2577 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
2578 else
2579 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
2580 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2581
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2582 /* we're not ready yet */
2583 return 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2584
2585 failed_keep_alive:
2586 /* Here we process low-level errors for keep-alive requests. In
2587 * short, if the request is not the first one and it experiences
2588 * a timeout, read error or shutdown, we just silently close so
2589 * that the client can try again.
2590 */
2591 txn->status = 0;
2592 msg->msg_state = HTTP_MSG_RQBEFORE;
2593 req->analysers = 0;
2594 s->logs.logwait = 0;
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2595 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]2596 stream_int_retnclose(req->prod, NULL);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2597 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2598 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2599
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2600 /* OK now we have a complete HTTP request with indexed headers. Let's
2601 * complete the request parsing by setting a few fields we will need
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]2602 * later. At this point, we have the last CRLF at req->data + msg->eoh.
2603 * If the request is in HTTP/0.9 form, the rule is still true, and eoh
2604 * points to the CRLF of the request line. req->lr points to the first
2605 * byte after the last LF. msg->col and msg->sov point to the first
2606 * byte of data. msg->eol cannot be trusted because it may have been
2607 * left uninitialized (for instance in the absence of headers).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2608 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]2609
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2610 session_inc_http_req_ctr(s);
Willy Tarreaud9b587f2010-02-26 10:05:55 +0100[diff] [blame]2611 proxy_inc_fe_req_ctr(s->fe); /* one more valid request for this FE */
2612
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2613 if (txn->flags & TX_WAIT_NEXT_RQ) {
2614 /* kill the pending keep-alive timeout */
2615 txn->flags &= ~TX_WAIT_NEXT_RQ;
2616 req->analyse_exp = TICK_ETERNITY;
2617 }
2618
2619
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2620 /* Maybe we found in invalid header name while we were configured not
2621 * to block on that, so we have to capture it now.
2622 */
2623 if (unlikely(msg->err_pos >= 0))
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2624 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2625
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2626 /*
2627 * 1: identify the method
2628 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2629 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2630
2631 /* we can make use of server redirect on GET and HEAD */
2632 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
2633 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2634
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2635 /*
2636 * 2: check if the URI matches the monitor_uri.
2637 * We have to do this for every request which gets in, because
2638 * the monitor-uri is defined by the frontend.
2639 */
2640 if (unlikely((s->fe->monitor_uri_len != 0) &&
2641 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2642 !memcmp(msg->sol + msg->sl.rq.u,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2643 s->fe->monitor_uri,
2644 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2645 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2646 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2647 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2648 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2649
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2650 s->flags |= SN_MONITOR;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2651
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2652 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2653 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
2654 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2655
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2656 ret = acl_pass(ret);
2657 if (cond->pol == ACL_COND_UNLESS)
2658 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2659
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2660 if (ret) {
2661 /* we fail this request, let's return 503 service unavail */
2662 txn->status = 503;
2663 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
2664 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2665 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2666 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]2667
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2668 /* nothing to fail, let's reply normaly */
2669 txn->status = 200;
2670 stream_int_retnclose(req->prod, &http_200_chunk);
2671 goto return_prx_cond;
2672 }
2673
2674 /*
2675 * 3: Maybe we have to copy the original REQURI for the logs ?
2676 * Note: we cannot log anymore if the request has been
2677 * classified as invalid.
2678 */
2679 if (unlikely(s->logs.logwait & LW_REQ)) {
2680 /* we have a complete HTTP request that we must log */
2681 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
2682 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2683
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2684 if (urilen >= REQURI_LEN)
2685 urilen = REQURI_LEN - 1;
2686 memcpy(txn->uri, &req->data[msg->som], urilen);
2687 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2688
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2689 if (!(s->logs.logwait &= ~LW_REQ))
2690 s->do_log(s);
2691 } else {
2692 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2693 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2694 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2695
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2696 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]2697 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
2698 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2699
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2700 /* ... and check if the request is HTTP/1.1 or above */
2701 if ((msg->sl.rq.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2702 ((msg->sol[msg->sl.rq.v + 5] > '1') ||
2703 ((msg->sol[msg->sl.rq.v + 5] == '1') &&
2704 (msg->sol[msg->sl.rq.v + 7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2705 txn->flags |= TX_REQ_VER_11;
2706
2707 /* "connection" has not been parsed yet */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2708 txn->flags &= ~(TX_HDR_CONN_PRS | TX_HDR_CONN_CLO | TX_HDR_CONN_KAL);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2709
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2710 /* if the frontend has "option http-use-proxy-header", we'll check if
2711 * we have what looks like a proxied connection instead of a connection,
2712 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
2713 * Note that this is *not* RFC-compliant, however browsers and proxies
2714 * happen to do that despite being non-standard :-(
2715 * We consider that a request not beginning with either '/' or '*' is
2716 * a proxied connection, which covers both "scheme://location" and
2717 * CONNECT ip:port.
2718 */
2719 if ((s->fe->options2 & PR_O2_USE_PXHDR) &&
2720 msg->sol[msg->sl.rq.u] != '/' && msg->sol[msg->sl.rq.u] != '*')
2721 txn->flags |= TX_USE_PX_CONN;
2722
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2723 /* transfer length unknown*/
2724 txn->flags &= ~TX_REQ_XFER_LEN;
2725
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2726 /* 5: we may need to capture headers */
2727 if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2728 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2729 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2730
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2731 /* 6: determine the transfer-length.
2732 * According to RFC2616 #4.4, amended by the HTTPbis working group,
2733 * the presence of a message-body in a REQUEST and its transfer length
2734 * must be determined that way (in order of precedence) :
2735 * 1. The presence of a message-body in a request is signaled by the
2736 * inclusion of a Content-Length or Transfer-Encoding header field
2737 * in the request's header fields. When a request message contains
2738 * both a message-body of non-zero length and a method that does
2739 * not define any semantics for that request message-body, then an
2740 * origin server SHOULD either ignore the message-body or respond
2741 * with an appropriate error message (e.g., 413). A proxy or
2742 * gateway, when presented the same request, SHOULD either forward
2743 * the request inbound with the message- body or ignore the
2744 * message-body when determining a response.
2745 *
2746 * 2. If a Transfer-Encoding header field (Section 9.7) is present
2747 * and the "chunked" transfer-coding (Section 6.2) is used, the
2748 * transfer-length is defined by the use of this transfer-coding.
2749 * If a Transfer-Encoding header field is present and the "chunked"
2750 * transfer-coding is not present, the transfer-length is defined
2751 * by the sender closing the connection.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2752 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2753 * 3. If a Content-Length header field is present, its decimal value in
2754 * OCTETs represents both the entity-length and the transfer-length.
2755 * If a message is received with both a Transfer-Encoding header
2756 * field and a Content-Length header field, the latter MUST be ignored.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2757 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2758 * 4. By the server closing the connection. (Closing the connection
2759 * cannot be used to indicate the end of a request body, since that
2760 * would leave no possibility for the server to send back a response.)
2761 *
2762 * Whenever a transfer-coding is applied to a message-body, the set of
2763 * transfer-codings MUST include "chunked", unless the message indicates
2764 * it is terminated by closing the connection. When the "chunked"
2765 * transfer-coding is used, it MUST be the last transfer-coding applied
2766 * to the message-body.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2767 */
2768
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2769 use_close_only = 0;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2770 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2771 /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]2772 while ((txn->flags & TX_REQ_VER_11) &&
2773 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2774 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
2775 txn->flags |= (TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2776 else if (txn->flags & TX_REQ_TE_CHNK) {
2777 /* bad transfer-encoding (chunked followed by something else) */
2778 use_close_only = 1;
2779 txn->flags &= ~(TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2780 break;
2781 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2782 }
2783
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2784 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2785 while (!(txn->flags & TX_REQ_TE_CHNK) && !use_close_only &&
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2786 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
2787 signed long long cl;
2788
2789 if (!ctx.vlen)
2790 goto return_bad_req;
2791
2792 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
2793 goto return_bad_req; /* parse failure */
2794
2795 if (cl < 0)
2796 goto return_bad_req;
2797
2798 if ((txn->flags & TX_REQ_CNT_LEN) && (msg->hdr_content_len != cl))
2799 goto return_bad_req; /* already specified, was different */
2800
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2801 txn->flags |= TX_REQ_CNT_LEN | TX_REQ_XFER_LEN;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2802 msg->hdr_content_len = cl;
2803 }
2804
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2805 /* bodyless requests have a known length */
2806 if (!use_close_only)
2807 txn->flags |= TX_REQ_XFER_LEN;
2808
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2809 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2810 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2811 req->analyse_exp = TICK_ETERNITY;
2812 return 1;
2813
2814 return_bad_req:
2815 /* We centralize bad requests processing here */
2816 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2817 /* we detected a parsing error. We want to archive this request
2818 * in the dedicated proxy area for later troubleshooting.
2819 */
2820 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2821 }
2822
2823 txn->req.msg_state = HTTP_MSG_ERROR;
2824 txn->status = 400;
2825 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2826
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2827 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2828 if (s->listener->counters)
2829 s->listener->counters->failed_req++;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2830
2831 return_prx_cond:
2832 if (!(s->flags & SN_ERR_MASK))
2833 s->flags |= SN_ERR_PRXCOND;
2834 if (!(s->flags & SN_FINST_MASK))
2835 s->flags |= SN_FINST_R;
2836
2837 req->analysers = 0;
2838 req->analyse_exp = TICK_ETERNITY;
2839 return 0;
2840}
2841
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2842/* We reached the stats page through a POST request.
2843 * Parse the posted data and enable/disable servers if necessary.
2844 * Returns 0 if request was parsed.
2845 * Returns 1 if there was a problem parsing the posted data.
2846 */
2847int http_process_req_stat_post(struct session *s, struct buffer *req)
2848{
2849 struct http_txn *txn = &s->txn;
2850 struct proxy *px;
2851 struct server *sv;
2852
2853 char *backend = NULL;
2854 int action = 0;
2855
2856 char *first_param, *cur_param, *next_param, *end_params;
2857
2858 first_param = req->data + txn->req.eoh + 2;
2859 end_params = first_param + txn->req.hdr_content_len;
2860
2861 cur_param = next_param = end_params;
2862
2863 if (end_params >= req->data + req->size) {
2864 /* Prevent buffer overflow */
2865 s->data_ctx.stats.st_code = STAT_STATUS_EXCD;
2866 return 1;
2867 }
2868 else if (end_params > req->data + req->l) {
2869 /* This condition also rejects a request with Expect: 100-continue */
2870 s->data_ctx.stats.st_code = STAT_STATUS_EXCD;
2871 return 1;
2872 }
2873
2874 *end_params = '\0';
2875
2876 s->data_ctx.stats.st_code = STAT_STATUS_NONE;
2877
2878 /*
2879 * Parse the parameters in reverse order to only store the last value.
2880 * From the html form, the backend and the action are at the end.
2881 */
2882 while (cur_param > first_param) {
2883 char *key, *value;
2884
2885 cur_param--;
2886 if ((*cur_param == '&') || (cur_param == first_param)) {
2887 /* Parse the key */
2888 key = cur_param;
2889 if (cur_param != first_param) {
2890 /* delimit the string for the next loop */
2891 *key++ = '\0';
2892 }
2893
2894 /* Parse the value */
2895 value = key;
2896 while (*value != '\0' && *value != '=') {
2897 value++;
2898 }
2899 if (*value == '=') {
2900 /* Ok, a value is found, we can mark the end of the key */
2901 *value++ = '\0';
2902 }
2903
2904 /* Now we can check the key to see what to do */
2905 if (!backend && strcmp(key, "b") == 0) {
2906 backend = value;
2907 }
2908 else if (!action && strcmp(key, "action") == 0) {
2909 if (strcmp(value, "disable") == 0) {
2910 action = 1;
2911 }
2912 else if (strcmp(value, "enable") == 0) {
2913 action = 2;
2914 } else {
2915 /* unknown action, no need to continue */
2916 break;
2917 }
2918 }
2919 else if (strcmp(key, "s") == 0) {
2920 if (backend && action && get_backend_server(backend, value, &px, &sv)) {
2921 switch (action) {
2922 case 1:
2923 if (! (sv->state & SRV_MAINTAIN)) {
2924 /* Not already in maintenance, we can change the server state */
2925 sv->state |= SRV_MAINTAIN;
2926 set_server_down(sv);
2927 s->data_ctx.stats.st_code = STAT_STATUS_DONE;
2928 }
2929 break;
2930 case 2:
2931 if ((sv->state & SRV_MAINTAIN)) {
2932 /* Already in maintenance, we can change the server state */
2933 set_server_up(sv);
Willy Tarreau70461302010-10-22 14:39:02 +0200[diff] [blame]2934 sv->health = sv->rise; /* up, but will fall down at first failure */
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]2935 s->data_ctx.stats.st_code = STAT_STATUS_DONE;
2936 }
2937 break;
2938 }
2939 }
2940 }
2941 next_param = cur_param;
2942 }
2943 }
2944 return 0;
2945}
2946
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2947/* This stream analyser runs all HTTP request processing which is common to
2948 * frontends and backends, which means blocking ACLs, filters, connection-close,
2949 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2950 * 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]2951 * either needs more data or wants to immediately abort the request (eg: deny,
2952 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2953 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2954int 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]2955{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2956 struct http_txn *txn = &s->txn;
2957 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2958 struct acl_cond *cond;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2959 struct req_acl_rule *req_acl, *req_acl_final = NULL;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2960 struct redirect_rule *rule;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]2961 struct cond_wordlist *wl;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2962 int del_ka, del_cl, do_stats;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2963
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2964 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2965 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2966 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2967 return 0;
2968 }
2969
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2970 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2971 req->analyse_exp = TICK_ETERNITY;
2972
2973 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2974 now_ms, __FUNCTION__,
2975 s,
2976 req,
2977 req->rex, req->wex,
2978 req->flags,
2979 req->l,
2980 req->analysers);
2981
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2982 /* first check whether we have some ACLs set to block this request */
2983 list_for_each_entry(cond, &px->block_cond, list) {
2984 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]2985
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2986 ret = acl_pass(ret);
2987 if (cond->pol == ACL_COND_UNLESS)
2988 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]2989
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2990 if (ret) {
2991 txn->status = 403;
2992 /* let's log the request time */
2993 s->logs.tv_request = now;
2994 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2995 session_inc_http_err_ctr(s);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2996 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2997 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2998 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2999
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3000 do_stats = stats_check_uri(s, px);
3001
3002 list_for_each_entry(req_acl, (do_stats?&px->uri_auth->req_acl:&px->req_acl), list) {
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3003 int ret = 1;
3004
3005 if (req_acl->action >= PR_REQ_ACL_ACT_MAX)
3006 continue;
3007
3008 /* check condition, but only if attached */
Krzysztof Olędzki711ad9e2010-02-01 12:36:53 +0100[diff] [blame]3009 if (req_acl->cond) {
3010 ret = acl_exec_cond(req_acl->cond, px, s, txn, ACL_DIR_REQ);
3011 ret = acl_pass(ret);
Willy Tarreau51425942010-02-01 10:40:19 +0100[diff] [blame]3012
Krzysztof Olędzki711ad9e2010-02-01 12:36:53 +0100[diff] [blame]3013 if (req_acl->cond->pol == ACL_COND_UNLESS)
3014 ret = !ret;
3015 }
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3016
3017 if (ret) {
3018 req_acl_final = req_acl;
3019 break;
3020 }
3021 }
3022
3023 if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_DENY) {
3024 txn->status = 403;
3025 s->logs.tv_request = now;
3026 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3027 session_inc_http_err_ctr(s);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3028 goto return_prx_cond;
3029 }
3030
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3031 /* try headers filters */
3032 if (px->req_exp != NULL) {
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]3033 if (apply_filters_to_request(s, req, px) < 0)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3034 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3035
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3036 /* has the request been denied ? */
3037 if (txn->flags & TX_CLDENY) {
3038 /* no need to go further */
3039 txn->status = 403;
3040 /* let's log the request time */
3041 s->logs.tv_request = now;
3042 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3043 session_inc_http_err_ctr(s);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3044 goto return_prx_cond;
3045 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3046
3047 /* When a connection is tarpitted, we use the tarpit timeout,
3048 * which may be the same as the connect timeout if unspecified.
3049 * If unset, then set it to zero because we really want it to
3050 * eventually expire. We build the tarpit as an analyser.
3051 */
3052 if (txn->flags & TX_CLTARPIT) {
3053 buffer_erase(s->req);
3054 /* wipe the request out so that we can drop the connection early
3055 * if the client closes first.
3056 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3057 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3058 req->analysers = 0; /* remove switching rules etc... */
3059 req->analysers |= AN_REQ_HTTP_TARPIT;
3060 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
3061 if (!req->analyse_exp)
3062 req->analyse_exp = tick_add(now_ms, 0);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3063 session_inc_http_err_ctr(s);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]3064 return 1;
3065 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3066 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3067
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3068 /* Until set to anything else, the connection mode is set as TUNNEL. It will
3069 * only change if both the request and the config reference something else.
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3070 * Option httpclose by itself does not set a mode, it remains a tunnel mode
3071 * in which headers are mangled. However, if another mode is set, it will
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3072 * affect it (eg: server-close/keep-alive + httpclose = close). Note that we
3073 * avoid to redo the same work if FE and BE have the same settings (common).
3074 * The method consists in checking if options changed between the two calls
3075 * (implying that either one is non-null, or one of them is non-null and we
3076 * are there for the first time.
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]3077 */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3078
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3079 del_cl = del_ka = 0;
3080
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]3081 if ((!(txn->flags & TX_HDR_CONN_PRS) &&
3082 (s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) ||
3083 ((s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) !=
3084 (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]3085 int tmp = TX_CON_WANT_TUN;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3086
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3087 if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE)
3088 tmp = TX_CON_WANT_KAL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]3089 if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO)
3090 tmp = TX_CON_WANT_SCL;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3091 if ((s->fe->options|s->be->options) & PR_O_FORCE_CLO)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3092 tmp = TX_CON_WANT_CLO;
3093
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3094 if ((txn->flags & TX_CON_WANT_MSK) < tmp)
3095 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3096
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3097 if (!(txn->flags & TX_HDR_CONN_PRS)) {
3098 /* parse the Connection header and possibly clean it */
3099 int to_del = 0;
3100 if ((txn->flags & TX_REQ_VER_11) ||
Willy Tarreau8a8e1d92010-04-05 16:15:16 +0200[diff] [blame]3101 ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL &&
3102 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3103 to_del |= 2; /* remove "keep-alive" */
3104 if (!(txn->flags & TX_REQ_VER_11))
3105 to_del |= 1; /* remove "close" */
3106 http_parse_connection_header(txn, msg, req, to_del);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3107 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3108
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3109 /* check if client or config asks for explicit close in KAL/SCL */
3110 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
3111 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
3112 ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */
3113 (txn->flags & (TX_REQ_VER_11|TX_HDR_CONN_KAL)) == 0 || /* no "connection: k-a" in 1.0 */
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3114 (((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) && /* httpclose without pretend-ka... */
3115 1/*!((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)*/) || /* ... +any = forceclose */
Willy Tarreauc3e8b252010-01-28 15:01:20 +0100[diff] [blame]3116 !(txn->flags & TX_REQ_XFER_LEN) || /* no length known => close */
3117 s->fe->state == PR_STSTOPPED)) /* frontend is stopping */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3118 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
3119 }
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]3120
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3121 /* add request headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]3122 list_for_each_entry(wl, &px->req_add, list) {
Willy Tarreau8abd4cd2010-01-31 14:30:44 +0100[diff] [blame]3123 if (wl->cond) {
3124 int ret = acl_exec_cond(wl->cond, px, s, txn, ACL_DIR_REQ);
3125 ret = acl_pass(ret);
3126 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
3127 ret = !ret;
3128 if (!ret)
3129 continue;
3130 }
3131
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]3132 if (unlikely(http_header_add_tail(req, &txn->req, &txn->hdr_idx, wl->s) < 0))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3133 goto return_bad_req;
3134 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3135
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3136 if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_HTTP_AUTH) {
3137 struct chunk msg;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3138 char *realm = req_acl->http_auth.realm;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3139
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3140 if (!realm)
3141 realm = do_stats?STATS_DEFAULT_REALM:px->id;
3142
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]3143 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]3144 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
3145 txn->status = 401;
3146 stream_int_retnclose(req->prod, &msg);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3147 /* on 401 we still count one error, because normal browsing
3148 * won't significantly increase the counter but brute force
3149 * attempts will.
3150 */
3151 session_inc_http_err_ctr(s);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3152 goto return_prx_cond;
3153 }
3154
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3155 if (do_stats) {
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3156 struct stats_admin_rule *stats_admin_rule;
3157
3158 /* We need to provide stats for this request.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3159 * FIXME!!! that one is rather dangerous, we want to
3160 * make it follow standard rules (eg: clear req->analysers).
3161 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3162
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3163 /* now check whether we have some admin rules for this request */
3164 list_for_each_entry(stats_admin_rule, &s->be->uri_auth->admin_rules, list) {
3165 int ret = 1;
3166
3167 if (stats_admin_rule->cond) {
3168 ret = acl_exec_cond(stats_admin_rule->cond, s->be, s, &s->txn, ACL_DIR_REQ);
3169 ret = acl_pass(ret);
3170 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
3171 ret = !ret;
3172 }
3173
3174 if (ret) {
3175 /* no rule, or the rule matches */
3176 s->data_ctx.stats.flags |= STAT_ADMIN;
3177 break;
3178 }
3179 }
3180
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]3181 /* Was the status page requested with a POST ? */
3182 if (txn->meth == HTTP_METH_POST) {
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]3183 if (s->data_ctx.stats.flags & STAT_ADMIN) {
3184 http_process_req_stat_post(s, req);
3185 } else {
3186 s->data_ctx.stats.st_code = STAT_STATUS_DENY;
3187 }
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]3188 }
3189
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3190 s->logs.tv_request = now;
3191 s->data_source = DATA_SRC_STATS;
3192 s->data_state = DATA_ST_INIT;
3193 s->task->nice = -32; /* small boost for HTTP statistics */
3194 stream_int_register_handler(s->rep->prod, http_stats_io_handler);
3195 s->rep->prod->private = s;
3196 s->rep->prod->st0 = s->rep->prod->st1 = 0;
3197 req->analysers = 0;
3198
3199 return 0;
3200
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3201 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3202
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3203 /* check whether we have some ACLs set to redirect this request */
3204 list_for_each_entry(rule, &px->redirect_rules, list) {
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3205 int ret = ACL_PAT_PASS;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3206
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3207 if (rule->cond) {
3208 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
3209 ret = acl_pass(ret);
3210 if (rule->cond->pol == ACL_COND_UNLESS)
3211 ret = !ret;
3212 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3213
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3214 if (ret) {
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3215 struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 };
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3216 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3217
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3218 /* build redirect message */
3219 switch(rule->code) {
3220 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3221 msg_fmt = HTTP_303;
3222 break;
3223 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3224 msg_fmt = HTTP_301;
3225 break;
3226 case 302:
3227 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3228 msg_fmt = HTTP_302;
3229 break;
3230 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3231
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3232 if (unlikely(!chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3233 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3234
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3235 switch(rule->type) {
3236 case REDIRECT_TYPE_PREFIX: {
3237 const char *path;
3238 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3239
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3240 path = http_get_path(txn);
3241 /* build message using path */
3242 if (path) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3243 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]3244 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
3245 int qs = 0;
3246 while (qs < pathlen) {
3247 if (path[qs] == '?') {
3248 pathlen = qs;
3249 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3250 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3251 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3252 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3253 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3254 } else {
3255 path = "/";
3256 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3257 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3258
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3259 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3260 goto return_bad_req;
3261
3262 /* add prefix. Note that if prefix == "/", we don't want to
3263 * add anything, otherwise it makes it hard for the user to
3264 * configure a self-redirection.
3265 */
3266 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3267 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3268 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3269 }
3270
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3271 /* add path */
3272 memcpy(rdr.str + rdr.len, path, pathlen);
3273 rdr.len += pathlen;
Willy Tarreau81e3b4f2010-01-10 00:42:19 +0100[diff] [blame]3274
3275 /* append a slash at the end of the location is needed and missing */
3276 if (rdr.len && rdr.str[rdr.len - 1] != '/' &&
3277 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
3278 if (rdr.len > rdr.size - 5)
3279 goto return_bad_req;
3280 rdr.str[rdr.len] = '/';
3281 rdr.len++;
3282 }
3283
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3284 break;
3285 }
3286 case REDIRECT_TYPE_LOCATION:
3287 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3288 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3289 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3290
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3291 /* add location */
3292 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3293 rdr.len += rule->rdr_len;
3294 break;
3295 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3296
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3297 if (rule->cookie_len) {
3298 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
3299 rdr.len += 14;
3300 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
3301 rdr.len += rule->cookie_len;
3302 memcpy(rdr.str + rdr.len, "\r\n", 2);
3303 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3304 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3305
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3306 /* add end of headers and the keep-alive/close status.
3307 * We may choose to set keep-alive if the Location begins
3308 * with a slash, because the client will come back to the
3309 * same server.
3310 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3311 txn->status = rule->code;
3312 /* let's log the request time */
3313 s->logs.tv_request = now;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3314
3315 if (rule->rdr_len >= 1 && *rule->rdr_str == '/' &&
3316 (txn->flags & TX_REQ_XFER_LEN) &&
3317 !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.hdr_content_len &&
3318 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
3319 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
3320 /* keep-alive possible */
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3321 if (!(txn->flags & TX_REQ_VER_11)) {
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3322 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3323 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: keep-alive", 30);
3324 rdr.len += 30;
3325 } else {
3326 memcpy(rdr.str + rdr.len, "\r\nConnection: keep-alive", 24);
3327 rdr.len += 24;
3328 }
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3329 }
3330 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
3331 rdr.len += 4;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3332 buffer_write(req->prod->ob, rdr.str, rdr.len);
3333 /* "eat" the request */
3334 buffer_ignore(req, msg->sov - msg->som);
3335 msg->som = msg->sov;
3336 req->analysers = AN_REQ_HTTP_XFER_BODY;
Willy Tarreau9300fb22010-01-05 00:58:24 +0100[diff] [blame]3337 s->rep->analysers = AN_RES_HTTP_XFER_BODY;
3338 txn->req.msg_state = HTTP_MSG_CLOSED;
3339 txn->rsp.msg_state = HTTP_MSG_DONE;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3340 break;
3341 } else {
3342 /* keep-alive not possible */
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3343 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3344 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
3345 rdr.len += 29;
3346 } else {
3347 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
3348 rdr.len += 23;
3349 }
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]3350 stream_int_retnclose(req->prod, &rdr);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3351 goto return_prx_cond;
3352 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3353 }
3354 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3355
Willy Tarreau2be39392010-01-03 17:24:51 +0100[diff] [blame]3356 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
3357 * If this happens, then the data will not come immediately, so we must
3358 * send all what we have without waiting. Note that due to the small gain
3359 * in waiting for the body of the request, it's easier to simply put the
3360 * BF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
3361 * itself once used.
3362 */
3363 req->flags |= BF_SEND_DONTWAIT;
3364
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3365 /* that's OK for us now, let's move on to next analysers */
3366 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]3367
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3368 return_bad_req:
3369 /* We centralize bad requests processing here */
3370 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
3371 /* we detected a parsing error. We want to archive this request
3372 * in the dedicated proxy area for later troubleshooting.
3373 */
3374 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
3375 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3376
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3377 txn->req.msg_state = HTTP_MSG_ERROR;
3378 txn->status = 400;
3379 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3380
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3381 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3382 if (s->listener->counters)
3383 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]3384
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3385 return_prx_cond:
3386 if (!(s->flags & SN_ERR_MASK))
3387 s->flags |= SN_ERR_PRXCOND;
3388 if (!(s->flags & SN_FINST_MASK))
3389 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]3390
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3391 req->analysers = 0;
3392 req->analyse_exp = TICK_ETERNITY;
3393 return 0;
3394}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3395
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3396/* This function performs all the processing enabled for the current request.
3397 * It returns 1 if the processing can continue on next analysers, or zero if it
3398 * needs more data, encounters an error, or wants to immediately abort the
3399 * request. It relies on buffers flags, and updates s->req->analysers.
3400 */
3401int http_process_request(struct session *s, struct buffer *req, int an_bit)
3402{
3403 struct http_txn *txn = &s->txn;
3404 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3405
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3406 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3407 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3408 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3409 return 0;
3410 }
3411
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3412 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3413 now_ms, __FUNCTION__,
3414 s,
3415 req,
3416 req->rex, req->wex,
3417 req->flags,
3418 req->l,
3419 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3420
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3421 /*
3422 * Right now, we know that we have processed the entire headers
3423 * and that unwanted requests have been filtered out. We can do
3424 * whatever we want with the remaining request. Also, now we
3425 * may have separate values for ->fe, ->be.
3426 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3427
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3428 /*
3429 * If HTTP PROXY is set we simply get remote server address
3430 * parsing incoming request.
3431 */
3432 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3433 url2sa(msg->sol + msg->sl.rq.u, msg->sl.rq.u_l, &s->srv_addr);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3434 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3435
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3436 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3437 * 7: Now we can work with the cookies.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3438 * Note that doing so might move headers in the request, but
3439 * the fields will stay coherent and the URI will not move.
3440 * This should only be performed in the backend.
3441 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]3442 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3443 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
3444 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]3445
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3446 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3447 * 8: the appsession cookie was looked up very early in 1.2,
3448 * so let's do the same now.
3449 */
3450
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]3451 /* It needs to look into the URI unless persistence must be ignored */
3452 if ((txn->sessid == NULL) && s->be->appsession_name && !(s->flags & SN_IGNORE_PRST)) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3453 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]3454 }
3455
3456 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3457 * 9: add X-Forwarded-For if either the frontend or the backend
3458 * asks for it.
3459 */
3460 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
3461 if (s->cli_addr.ss_family == AF_INET) {
3462 /* Add an X-Forwarded-For header unless the source IP is
3463 * in the 'except' network range.
3464 */
3465 if ((!s->fe->except_mask.s_addr ||
3466 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr)
3467 != s->fe->except_net.s_addr) &&
3468 (!s->be->except_mask.s_addr ||
3469 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr)
3470 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3471 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3472 unsigned char *pn;
3473 pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3474
3475 /* Note: we rely on the backend to get the header name to be used for
3476 * x-forwarded-for, because the header is really meant for the backends.
3477 * However, if the backend did not specify any option, we have to rely
3478 * on the frontend's header name.
3479 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3480 if (s->be->fwdfor_hdr_len) {
3481 len = s->be->fwdfor_hdr_len;
3482 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3483 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3484 len = s->fe->fwdfor_hdr_len;
3485 memcpy(trash, s->fe->fwdfor_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3486 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3487 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]3488
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]3489 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3490 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3491 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3492 }
3493 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3494 else if (s->cli_addr.ss_family == AF_INET6) {
3495 /* FIXME: for the sake of completeness, we should also support
3496 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3497 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3498 int len;
3499 char pn[INET6_ADDRSTRLEN];
3500 inet_ntop(AF_INET6,
3501 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
3502 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3503
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3504 /* Note: we rely on the backend to get the header name to be used for
3505 * x-forwarded-for, because the header is really meant for the backends.
3506 * However, if the backend did not specify any option, we have to rely
3507 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3508 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3509 if (s->be->fwdfor_hdr_len) {
3510 len = s->be->fwdfor_hdr_len;
3511 memcpy(trash, s->be->fwdfor_hdr_name, len);
3512 } else {
3513 len = s->fe->fwdfor_hdr_len;
3514 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3515 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3516 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3517
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3518 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3519 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3520 goto return_bad_req;
3521 }
3522 }
3523
3524 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3525 * 10: add X-Original-To if either the frontend or the backend
3526 * asks for it.
3527 */
3528 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
3529
3530 /* FIXME: don't know if IPv6 can handle that case too. */
3531 if (s->cli_addr.ss_family == AF_INET) {
3532 /* Add an X-Original-To header unless the destination IP is
3533 * in the 'except' network range.
3534 */
3535 if (!(s->flags & SN_FRT_ADDR_SET))
3536 get_frt_addr(s);
3537
3538 if ((!s->fe->except_mask_to.s_addr ||
3539 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
3540 != s->fe->except_to.s_addr) &&
3541 (!s->be->except_mask_to.s_addr ||
3542 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
3543 != s->be->except_to.s_addr)) {
3544 int len;
3545 unsigned char *pn;
3546 pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr;
3547
3548 /* Note: we rely on the backend to get the header name to be used for
3549 * x-original-to, because the header is really meant for the backends.
3550 * However, if the backend did not specify any option, we have to rely
3551 * on the frontend's header name.
3552 */
3553 if (s->be->orgto_hdr_len) {
3554 len = s->be->orgto_hdr_len;
3555 memcpy(trash, s->be->orgto_hdr_name, len);
3556 } else {
3557 len = s->fe->orgto_hdr_len;
3558 memcpy(trash, s->fe->orgto_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3559 }
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3560 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
3561
3562 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3563 &txn->hdr_idx, trash, len) < 0))
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3564 goto return_bad_req;
3565 }
3566 }
3567 }
3568
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3569 /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set. */
3570 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3571 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) ||
3572 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3573 unsigned int want_flags = 0;
3574
3575 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3576 if (((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL ||
3577 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) &&
3578 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3579 want_flags |= TX_CON_CLO_SET;
3580 } else {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3581 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL &&
3582 !((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) ||
3583 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3584 want_flags |= TX_CON_KAL_SET;
3585 }
3586
3587 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
3588 http_change_connection_header(txn, msg, req, want_flags);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3589 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3590
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3591
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3592 /* If we have no server assigned yet and we're balancing on url_param
3593 * with a POST request, we may be interested in checking the body for
3594 * that parameter. This will be done in another analyser.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3595 */
3596 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
3597 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3598 s->be->url_param_post_limit != 0 &&
3599 (txn->flags & (TX_REQ_CNT_LEN|TX_REQ_TE_CHNK)) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3600 memchr(msg->sol + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3601 buffer_dont_connect(req);
3602 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3603 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3604
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3605 if (txn->flags & TX_REQ_XFER_LEN)
3606 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]3607
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3608 /*************************************************************
3609 * OK, that's finished for the headers. We have done what we *
3610 * could. Let's switch to the DATA state. *
3611 ************************************************************/
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3612 req->analyse_exp = TICK_ETERNITY;
3613 req->analysers &= ~an_bit;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3614
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3615 s->logs.tv_request = now;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3616 /* OK let's go on with the BODY now */
3617 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3618
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3619 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3620 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3621 /* we detected a parsing error. We want to archive this request
3622 * in the dedicated proxy area for later troubleshooting.
3623 */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3624 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3625 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3626
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3627 txn->req.msg_state = HTTP_MSG_ERROR;
3628 txn->status = 400;
3629 req->analysers = 0;
3630 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3631
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3632 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3633 if (s->listener->counters)
3634 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3635
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3636 if (!(s->flags & SN_ERR_MASK))
3637 s->flags |= SN_ERR_PRXCOND;
3638 if (!(s->flags & SN_FINST_MASK))
3639 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3640 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3641}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3642
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3643/* This function is an analyser which processes the HTTP tarpit. It always
3644 * returns zero, at the beginning because it prevents any other processing
3645 * from occurring, and at the end because it terminates the request.
3646 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3647int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3648{
3649 struct http_txn *txn = &s->txn;
3650
3651 /* This connection is being tarpitted. The CLIENT side has
3652 * already set the connect expiration date to the right
3653 * timeout. We just have to check that the client is still
3654 * there and that the timeout has not expired.
3655 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3656 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3657 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
3658 !tick_is_expired(req->analyse_exp, now_ms))
3659 return 0;
3660
3661 /* We will set the queue timer to the time spent, just for
3662 * logging purposes. We fake a 500 server error, so that the
3663 * attacker will not suspect his connection has been tarpitted.
3664 * It will not cause trouble to the logs because we can exclude
3665 * the tarpitted connections by filtering on the 'PT' status flags.
3666 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3667 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
3668
3669 txn->status = 500;
3670 if (req->flags != BF_READ_ERROR)
3671 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
3672
3673 req->analysers = 0;
3674 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3675
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3676 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3677 if (s->listener->counters)
3678 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3679
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3680 if (!(s->flags & SN_ERR_MASK))
3681 s->flags |= SN_ERR_PRXCOND;
3682 if (!(s->flags & SN_FINST_MASK))
3683 s->flags |= SN_FINST_T;
3684 return 0;
3685}
3686
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3687/* This function is an analyser which processes the HTTP request body. It looks
3688 * for parameters to be used for the load balancing algorithm (url_param). It
3689 * must only be called after the standard HTTP request processing has occurred,
3690 * because it expects the request to be parsed. It returns zero if it needs to
3691 * read more data, or 1 once it has completed its analysis.
3692 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3693int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3694{
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3695 struct http_txn *txn = &s->txn;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3696 struct http_msg *msg = &s->txn.req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3697 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3698
3699 /* We have to parse the HTTP request body to find any required data.
3700 * "balance url_param check_post" should have been the only way to get
3701 * into this. We were brought here after HTTP header analysis, so all
3702 * related structures are ready.
3703 */
3704
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3705 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3706 goto missing_data;
3707
3708 if (msg->msg_state < HTTP_MSG_100_SENT) {
3709 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3710 * send an HTTP/1.1 100 Continue intermediate response.
3711 */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]3712 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3713 struct hdr_ctx ctx;
3714 ctx.idx = 0;
3715 /* Expect is allowed in 1.1, look for it */
3716 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3717 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3718 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3719 }
3720 }
3721 msg->msg_state = HTTP_MSG_100_SENT;
3722 }
3723
3724 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3725 /* we have msg->col and msg->sov which both point to the first
3726 * byte of message body. msg->som still points to the beginning
3727 * of the message. We must save the body in req->lr because it
3728 * survives buffer re-alignments.
3729 */
3730 req->lr = req->data + msg->sov;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3731 if (txn->flags & TX_REQ_TE_CHNK)
3732 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3733 else
3734 msg->msg_state = HTTP_MSG_DATA;
3735 }
3736
3737 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3738 /* read the chunk size and assign it to ->hdr_content_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3739 * set ->sov and ->lr to point to the body and switch to DATA or
3740 * TRAILERS state.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3741 */
3742 int ret = http_parse_chunk_size(req, msg);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3743
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3744 if (!ret)
3745 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3746 else if (ret < 0) {
3747 session_inc_http_err_ctr(s);
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3748 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3749 }
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3750 }
3751
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3752 /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3753 * We have the first non-header byte in msg->col, which is either the
3754 * beginning of the chunk size or of the data. The first data byte is in
3755 * msg->sov, which is equal to msg->col when not using transfer-encoding.
3756 * We're waiting for at least <url_param_post_limit> bytes after msg->sov.
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3757 */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3758
3759 if (msg->hdr_content_len < limit)
3760 limit = msg->hdr_content_len;
3761
Willy Tarreau7c96f672009-12-27 22:47:25 +0100[diff] [blame]3762 if (req->l - (msg->sov - msg->som) >= limit) /* we have enough bytes now */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3763 goto http_end;
3764
3765 missing_data:
3766 /* we get here if we need to wait for more data */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3767 if (req->flags & BF_FULL) {
3768 session_inc_http_err_ctr(s);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3769 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3770 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3771
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3772 if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
3773 txn->status = 408;
3774 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3775
3776 if (!(s->flags & SN_ERR_MASK))
3777 s->flags |= SN_ERR_CLITO;
3778 if (!(s->flags & SN_FINST_MASK))
3779 s->flags |= SN_FINST_D;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3780 goto return_err_msg;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3781 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3782
3783 /* we get here if we need to wait for more data */
3784 if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3785 /* Not enough data. We'll re-use the http-request
3786 * timeout here. Ideally, we should set the timeout
3787 * relative to the accept() date. We just set the
3788 * request timeout once at the beginning of the
3789 * request.
3790 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3791 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3792 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]3793 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3794 return 0;
3795 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3796
3797 http_end:
3798 /* The situation will not evolve, so let's give up on the analysis. */
3799 s->logs.tv_request = now; /* update the request timer to reflect full request */
3800 req->analysers &= ~an_bit;
3801 req->analyse_exp = TICK_ETERNITY;
3802 return 1;
3803
3804 return_bad_req: /* let's centralize all bad requests */
3805 txn->req.msg_state = HTTP_MSG_ERROR;
3806 txn->status = 400;
3807 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
3808
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3809 if (!(s->flags & SN_ERR_MASK))
3810 s->flags |= SN_ERR_PRXCOND;
3811 if (!(s->flags & SN_FINST_MASK))
3812 s->flags |= SN_FINST_R;
3813
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3814 return_err_msg:
3815 req->analysers = 0;
3816 s->fe->counters.failed_req++;
3817 if (s->listener->counters)
3818 s->listener->counters->failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3819 return 0;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3820}
3821
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3822/* Terminate current transaction and prepare a new one. This is very tricky
3823 * right now but it works.
3824 */
3825void http_end_txn_clean_session(struct session *s)
3826{
3827 /* FIXME: We need a more portable way of releasing a backend's and a
3828 * server's connections. We need a safer way to reinitialize buffer
3829 * flags. We also need a more accurate method for computing per-request
3830 * data.
3831 */
3832 http_silent_debug(__LINE__, s);
3833
3834 s->req->cons->flags |= SI_FL_NOLINGER;
3835 s->req->cons->shutr(s->req->cons);
3836 s->req->cons->shutw(s->req->cons);
3837
3838 http_silent_debug(__LINE__, s);
3839
3840 if (s->flags & SN_BE_ASSIGNED)
3841 s->be->beconn--;
3842
3843 s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
3844 session_process_counters(s);
Willy Tarreauf059a0f2010-08-03 16:29:52 +0200[diff] [blame]3845 session_stop_backend_counters(s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3846
3847 if (s->txn.status) {
3848 int n;
3849
3850 n = s->txn.status / 100;
3851 if (n < 1 || n > 5)
3852 n = 0;
3853
3854 if (s->fe->mode == PR_MODE_HTTP)
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3855 s->fe->counters.fe.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3856
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3857 if ((s->flags & SN_BE_ASSIGNED) &&
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3858 (s->be->mode == PR_MODE_HTTP))
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3859 s->be->counters.be.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3860 }
3861
3862 /* don't count other requests' data */
3863 s->logs.bytes_in -= s->req->l - s->req->send_max;
3864 s->logs.bytes_out -= s->rep->l - s->rep->send_max;
3865
3866 /* let's do a final log if we need it */
3867 if (s->logs.logwait &&
3868 !(s->flags & SN_MONITOR) &&
3869 (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
3870 s->do_log(s);
3871 }
3872
3873 s->logs.accept_date = date; /* user-visible date for logging */
3874 s->logs.tv_accept = now; /* corrected date for internal use */
3875 tv_zero(&s->logs.tv_request);
3876 s->logs.t_queue = -1;
3877 s->logs.t_connect = -1;
3878 s->logs.t_data = -1;
3879 s->logs.t_close = 0;
3880 s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
3881 s->logs.srv_queue_size = 0; /* we will get this number soon */
3882
3883 s->logs.bytes_in = s->req->total = s->req->l - s->req->send_max;
3884 s->logs.bytes_out = s->rep->total = s->rep->l - s->rep->send_max;
3885
3886 if (s->pend_pos)
3887 pendconn_free(s->pend_pos);
3888
3889 if (s->srv) {
3890 if (s->flags & SN_CURR_SESS) {
3891 s->flags &= ~SN_CURR_SESS;
3892 s->srv->cur_sess--;
3893 }
3894 if (may_dequeue_tasks(s->srv, s->be))
3895 process_srv_queue(s->srv);
3896 }
3897
3898 if (unlikely(s->srv_conn))
3899 sess_change_server(s, NULL);
3900 s->srv = NULL;
3901
3902 s->req->cons->state = s->req->cons->prev_state = SI_ST_INI;
3903 s->req->cons->fd = -1; /* just to help with debugging */
3904 s->req->cons->err_type = SI_ET_NONE;
3905 s->req->cons->err_loc = NULL;
3906 s->req->cons->exp = TICK_ETERNITY;
3907 s->req->cons->flags = SI_FL_NONE;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3908 s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST);
3909 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);
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]3910 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]3911 s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE);
3912 s->txn.meth = 0;
3913 http_reset_txn(s);
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]3914 s->txn.flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ;
Willy Tarreauee55dc02010-06-01 10:56:34 +0200[diff] [blame]3915 if (s->fe->options2 & PR_O2_INDEPSTR)
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3916 s->req->cons->flags |= SI_FL_INDEP_STR;
3917
3918 /* if the request buffer is not empty, it means we're
3919 * about to process another request, so send pending
3920 * data with MSG_MORE to merge TCP packets when possible.
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3921 * Just don't do this if the buffer is close to be full,
3922 * because the request will wait for it to flush a little
3923 * bit before proceeding.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3924 */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3925 if (s->req->l > s->req->send_max) {
3926 if (s->rep->send_max &&
3927 !(s->rep->flags & BF_FULL) &&
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3928 s->rep->r <= s->rep->data + s->rep->size - global.tune.maxrewrite)
3929 s->rep->flags |= BF_EXPECT_MORE;
3930 }
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3931
3932 /* we're removing the analysers, we MUST re-enable events detection */
3933 buffer_auto_read(s->req);
3934 buffer_auto_close(s->req);
3935 buffer_auto_read(s->rep);
3936 buffer_auto_close(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3937
3938 /* make ->lr point to the first non-forwarded byte */
3939 s->req->lr = s->req->w + s->req->send_max;
3940 if (s->req->lr >= s->req->data + s->req->size)
3941 s->req->lr -= s->req->size;
3942 s->rep->lr = s->rep->w + s->rep->send_max;
3943 if (s->rep->lr >= s->rep->data + s->rep->size)
3944 s->rep->lr -= s->req->size;
3945
Willy Tarreau6df7a0e2010-08-03 11:52:10 +0200[diff] [blame]3946 s->req->analysers |= s->listener->analysers;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3947 s->rep->analysers = 0;
3948
3949 http_silent_debug(__LINE__, s);
3950}
3951
3952
3953/* This function updates the request state machine according to the response
3954 * state machine and buffer flags. It returns 1 if it changes anything (flag
3955 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
3956 * it is only used to find when a request/response couple is complete. Both
3957 * this function and its equivalent should loop until both return zero. It
3958 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
3959 */
3960int http_sync_req_state(struct session *s)
3961{
3962 struct buffer *buf = s->req;
3963 struct http_txn *txn = &s->txn;
3964 unsigned int old_flags = buf->flags;
3965 unsigned int old_state = txn->req.msg_state;
3966
3967 http_silent_debug(__LINE__, s);
3968 if (unlikely(txn->req.msg_state < HTTP_MSG_BODY))
3969 return 0;
3970
3971 if (txn->req.msg_state == HTTP_MSG_DONE) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3972 /* No need to read anymore, the request was completely parsed.
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]3973 * We can shut the read side unless we want to abort_on_close,
3974 * or we have a POST request. The issue with POST requests is
3975 * that some browsers still send a CRLF after the request, and
3976 * this CRLF must be read so that it does not remain in the kernel
3977 * buffers, otherwise a close could cause an RST on some systems
3978 * (eg: Linux).
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3979 */
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]3980 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3981 buffer_dont_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3982
3983 if (txn->rsp.msg_state == HTTP_MSG_ERROR)
3984 goto wait_other_side;
3985
3986 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
3987 /* The server has not finished to respond, so we
3988 * don't want to move in order not to upset it.
3989 */
3990 goto wait_other_side;
3991 }
3992
3993 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
3994 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3995 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3996 txn->req.msg_state = HTTP_MSG_TUNNEL;
3997 goto wait_other_side;
3998 }
3999
4000 /* When we get here, it means that both the request and the
4001 * response have finished receiving. Depending on the connection
4002 * mode, we'll have to wait for the last bytes to leave in either
4003 * direction, and sometimes for a close to be effective.
4004 */
4005
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4006 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4007 /* Server-close mode : queue a connection close to the server */
4008 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW)))
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4009 buffer_shutw_now(buf);
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4010 }
4011 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4012 /* Option forceclose is set, or either side wants to close,
4013 * let's enforce it now that we're not expecting any new
4014 * data to come. The caller knows the session is complete
4015 * once both states are CLOSED.
4016 */
4017 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4018 buffer_shutr_now(buf);
4019 buffer_shutw_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4020 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4021 }
4022 else {
4023 /* The last possible modes are keep-alive and tunnel. Since tunnel
4024 * mode does not set the body analyser, we can't reach this place
4025 * in tunnel mode, so we're left with keep-alive only.
4026 * This mode is currently not implemented, we switch to tunnel mode.
4027 */
4028 buffer_auto_read(buf);
4029 txn->req.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4030 }
4031
4032 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4033 /* if we've just closed an output, let's switch */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4034 buf->cons->flags |= SI_FL_NOLINGER; /* we want to close ASAP */
4035
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4036 if (!(buf->flags & BF_OUT_EMPTY)) {
4037 txn->req.msg_state = HTTP_MSG_CLOSING;
4038 goto http_msg_closing;
4039 }
4040 else {
4041 txn->req.msg_state = HTTP_MSG_CLOSED;
4042 goto http_msg_closed;
4043 }
4044 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4045 goto wait_other_side;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4046 }
4047
4048 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4049 http_msg_closing:
4050 /* nothing else to forward, just waiting for the output buffer
4051 * to be empty and for the shutw_now to take effect.
4052 */
4053 if (buf->flags & BF_OUT_EMPTY) {
4054 txn->req.msg_state = HTTP_MSG_CLOSED;
4055 goto http_msg_closed;
4056 }
4057 else if (buf->flags & BF_SHUTW) {
4058 txn->req.msg_state = HTTP_MSG_ERROR;
4059 goto wait_other_side;
4060 }
4061 }
4062
4063 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4064 http_msg_closed:
4065 goto wait_other_side;
4066 }
4067
4068 wait_other_side:
4069 http_silent_debug(__LINE__, s);
4070 return txn->req.msg_state != old_state || buf->flags != old_flags;
4071}
4072
4073
4074/* This function updates the response state machine according to the request
4075 * state machine and buffer flags. It returns 1 if it changes anything (flag
4076 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
4077 * it is only used to find when a request/response couple is complete. Both
4078 * this function and its equivalent should loop until both return zero. It
4079 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
4080 */
4081int http_sync_res_state(struct session *s)
4082{
4083 struct buffer *buf = s->rep;
4084 struct http_txn *txn = &s->txn;
4085 unsigned int old_flags = buf->flags;
4086 unsigned int old_state = txn->rsp.msg_state;
4087
4088 http_silent_debug(__LINE__, s);
4089 if (unlikely(txn->rsp.msg_state < HTTP_MSG_BODY))
4090 return 0;
4091
4092 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4093 /* In theory, we don't need to read anymore, but we must
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4094 * still monitor the server connection for a possible close
4095 * while the request is being uploaded, so we don't disable
4096 * reading.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4097 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4098 /* buffer_dont_read(buf); */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4099
4100 if (txn->req.msg_state == HTTP_MSG_ERROR)
4101 goto wait_other_side;
4102
4103 if (txn->req.msg_state < HTTP_MSG_DONE) {
4104 /* The client seems to still be sending data, probably
4105 * because we got an error response during an upload.
4106 * We have the choice of either breaking the connection
4107 * or letting it pass through. Let's do the later.
4108 */
4109 goto wait_other_side;
4110 }
4111
4112 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
4113 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4114 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4115 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4116 goto wait_other_side;
4117 }
4118
4119 /* When we get here, it means that both the request and the
4120 * response have finished receiving. Depending on the connection
4121 * mode, we'll have to wait for the last bytes to leave in either
4122 * direction, and sometimes for a close to be effective.
4123 */
4124
4125 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4126 /* Server-close mode : shut read and wait for the request
4127 * side to close its output buffer. The caller will detect
4128 * when we're in DONE and the other is in CLOSED and will
4129 * catch that for the final cleanup.
4130 */
4131 if (!(buf->flags & (BF_SHUTR|BF_SHUTR_NOW)))
4132 buffer_shutr_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4133 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4134 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4135 /* Option forceclose is set, or either side wants to close,
4136 * let's enforce it now that we're not expecting any new
4137 * data to come. The caller knows the session is complete
4138 * once both states are CLOSED.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4139 */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4140 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
4141 buffer_shutr_now(buf);
4142 buffer_shutw_now(buf);
4143 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4144 }
4145 else {
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4146 /* The last possible modes are keep-alive and tunnel. Since tunnel
4147 * mode does not set the body analyser, we can't reach this place
4148 * in tunnel mode, so we're left with keep-alive only.
4149 * This mode is currently not implemented, we switch to tunnel mode.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4150 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4151 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4152 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4153 }
4154
4155 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4156 /* if we've just closed an output, let's switch */
4157 if (!(buf->flags & BF_OUT_EMPTY)) {
4158 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4159 goto http_msg_closing;
4160 }
4161 else {
4162 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4163 goto http_msg_closed;
4164 }
4165 }
4166 goto wait_other_side;
4167 }
4168
4169 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4170 http_msg_closing:
4171 /* nothing else to forward, just waiting for the output buffer
4172 * to be empty and for the shutw_now to take effect.
4173 */
4174 if (buf->flags & BF_OUT_EMPTY) {
4175 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4176 goto http_msg_closed;
4177 }
4178 else if (buf->flags & BF_SHUTW) {
4179 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreauae526782010-03-04 20:34:23 +0100[diff] [blame]4180 s->be->counters.cli_aborts++;
4181 if (s->srv)
4182 s->srv->counters.cli_aborts++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4183 goto wait_other_side;
4184 }
4185 }
4186
4187 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4188 http_msg_closed:
4189 /* drop any pending data */
4190 buffer_ignore(buf, buf->l - buf->send_max);
4191 buffer_auto_close(buf);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4192 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4193 goto wait_other_side;
4194 }
4195
4196 wait_other_side:
4197 http_silent_debug(__LINE__, s);
4198 return txn->rsp.msg_state != old_state || buf->flags != old_flags;
4199}
4200
4201
4202/* Resync the request and response state machines. Return 1 if either state
4203 * changes.
4204 */
4205int http_resync_states(struct session *s)
4206{
4207 struct http_txn *txn = &s->txn;
4208 int old_req_state = txn->req.msg_state;
4209 int old_res_state = txn->rsp.msg_state;
4210
4211 http_silent_debug(__LINE__, s);
4212 http_sync_req_state(s);
4213 while (1) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4214 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4215 if (!http_sync_res_state(s))
4216 break;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4217 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4218 if (!http_sync_req_state(s))
4219 break;
4220 }
4221 http_silent_debug(__LINE__, s);
4222 /* OK, both state machines agree on a compatible state.
4223 * There are a few cases we're interested in :
4224 * - HTTP_MSG_TUNNEL on either means we have to disable both analysers
4225 * - HTTP_MSG_CLOSED on both sides means we've reached the end in both
4226 * directions, so let's simply disable both analysers.
4227 * - HTTP_MSG_CLOSED on the response only means we must abort the
4228 * request.
4229 * - HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE on the response
4230 * with server-close mode means we've completed one request and we
4231 * must re-initialize the server connection.
4232 */
4233
4234 if (txn->req.msg_state == HTTP_MSG_TUNNEL ||
4235 txn->rsp.msg_state == HTTP_MSG_TUNNEL ||
4236 (txn->req.msg_state == HTTP_MSG_CLOSED &&
4237 txn->rsp.msg_state == HTTP_MSG_CLOSED)) {
4238 s->req->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4239 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4240 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4241 s->rep->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4242 buffer_auto_close(s->rep);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4243 buffer_auto_read(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4244 }
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4245 else if (txn->rsp.msg_state == HTTP_MSG_CLOSED ||
4246 txn->rsp.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4247 txn->req.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4248 (s->rep->flags & BF_SHUTW)) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4249 s->rep->analysers = 0;
4250 buffer_auto_close(s->rep);
4251 buffer_auto_read(s->rep);
4252 s->req->analysers = 0;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4253 buffer_abort(s->req);
4254 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4255 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4256 buffer_ignore(s->req, s->req->l - s->req->send_max);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4257 }
4258 else if (txn->req.msg_state == HTTP_MSG_CLOSED &&
4259 txn->rsp.msg_state == HTTP_MSG_DONE &&
4260 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)) {
4261 /* server-close: terminate this server connection and
4262 * reinitialize a fresh-new transaction.
4263 */
4264 http_end_txn_clean_session(s);
4265 }
4266
4267 http_silent_debug(__LINE__, s);
4268 return txn->req.msg_state != old_req_state ||
4269 txn->rsp.msg_state != old_res_state;
4270}
4271
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4272/* This function is an analyser which forwards request body (including chunk
4273 * sizes if any). It is called as soon as we must forward, even if we forward
4274 * zero byte. The only situation where it must not be called is when we're in
4275 * tunnel mode and we want to forward till the close. It's used both to forward
4276 * remaining data and to resync after end of body. It expects the msg_state to
4277 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4278 * read more data, or 1 once we can go on with next request or end the session.
4279 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
4280 * bytes of pending data + the headers if not already done (between som and sov).
4281 * It eventually adjusts som to match sov after the data in between have been sent.
4282 */
4283int http_request_forward_body(struct session *s, struct buffer *req, int an_bit)
4284{
4285 struct http_txn *txn = &s->txn;
4286 struct http_msg *msg = &s->txn.req;
4287
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4288 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4289 return 0;
4290
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4291 if ((req->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
4292 ((req->flags & BF_SHUTW) && (req->to_forward || req->send_max))) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4293 /* Output closed while we were sending data. We must abort and
4294 * wake the other side up.
4295 */
4296 msg->msg_state = HTTP_MSG_ERROR;
4297 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4298 return 1;
4299 }
4300
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4301 /* in most states, we should abort in case of early close */
4302 buffer_auto_close(req);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4303
4304 /* Note that we don't have to send 100-continue back because we don't
4305 * need the data to complete our job, and it's up to the server to
4306 * decide whether to return 100, 417 or anything else in return of
4307 * an "Expect: 100-continue" header.
4308 */
4309
4310 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
4311 /* we have msg->col and msg->sov which both point to the first
4312 * byte of message body. msg->som still points to the beginning
4313 * of the message. We must save the body in req->lr because it
4314 * survives buffer re-alignments.
4315 */
4316 req->lr = req->data + msg->sov;
4317 if (txn->flags & TX_REQ_TE_CHNK)
4318 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4319 else {
4320 msg->msg_state = HTTP_MSG_DATA;
4321 }
4322 }
4323
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4324 while (1) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4325 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4326 /* we may have some data pending */
4327 if (msg->hdr_content_len || msg->som != msg->sov) {
4328 int bytes = msg->sov - msg->som;
4329 if (bytes < 0) /* sov may have wrapped at the end */
4330 bytes += req->size;
4331 buffer_forward(req, bytes + msg->hdr_content_len);
4332 msg->hdr_content_len = 0; /* don't forward that again */
4333 msg->som = msg->sov;
4334 }
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4335
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4336 if (msg->msg_state == HTTP_MSG_DATA) {
4337 /* must still forward */
4338 if (req->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4339 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4340
4341 /* nothing left to forward */
4342 if (txn->flags & TX_REQ_TE_CHNK)
4343 msg->msg_state = HTTP_MSG_DATA_CRLF;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4344 else
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4345 msg->msg_state = HTTP_MSG_DONE;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4346 }
4347 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4348 /* read the chunk size and assign it to ->hdr_content_len, then
4349 * set ->sov and ->lr to point to the body and switch to DATA or
4350 * TRAILERS state.
4351 */
4352 int ret = http_parse_chunk_size(req, msg);
4353
4354 if (!ret)
4355 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4356 else if (ret < 0) {
4357 session_inc_http_err_ctr(s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4358 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4359 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4360 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4361 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4362 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
4363 /* we want the CRLF after the data */
4364 int ret;
4365
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]4366 req->lr = req->w + req->send_max;
4367 if (req->lr >= req->data + req->size)
4368 req->lr -= req->size;
4369
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4370 ret = http_skip_chunk_crlf(req, msg);
4371
4372 if (ret == 0)
4373 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4374 else if (ret < 0) {
4375 session_inc_http_err_ctr(s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4376 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4377 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4378 /* we're in MSG_CHUNK_SIZE now */
4379 }
4380 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
4381 int ret = http_forward_trailers(req, msg);
4382
4383 if (ret == 0)
4384 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4385 else if (ret < 0) {
4386 session_inc_http_err_ctr(s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4387 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4388 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4389 /* we're in HTTP_MSG_DONE now */
4390 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4391 else {
4392 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4393 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4394 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
4395 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
4396 buffer_dont_close(req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4397 if (http_resync_states(s)) {
4398 /* some state changes occurred, maybe the analyser
4399 * was disabled too.
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]4400 */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4401 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
4402 goto return_bad_req;
4403 return 1;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4404 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4405
4406 /* If "option abortonclose" is set on the backend, we
4407 * want to monitor the client's connection and forward
4408 * any shutdown notification to the server, which will
4409 * decide whether to close or to go on processing the
4410 * request.
4411 */
4412 if (s->be->options & PR_O_ABRT_CLOSE) {
4413 buffer_auto_read(req);
4414 buffer_auto_close(req);
4415 }
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4416 else if (s->txn.meth == HTTP_METH_POST) {
4417 /* POST requests may require to read extra CRLF
4418 * sent by broken browsers and which could cause
4419 * an RST to be sent upon close on some systems
4420 * (eg: Linux).
4421 */
4422 buffer_auto_read(req);
4423 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4424
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4425 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4426 }
4427 }
4428
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4429 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4430 /* stop waiting for data if the input is closed before the end */
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4431 if (req->flags & BF_SHUTR) {
4432 if (!(s->flags & SN_ERR_MASK))
4433 s->flags |= SN_ERR_CLICL;
4434 if (!(s->flags & SN_FINST_MASK))
4435 s->flags |= SN_FINST_D;
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4436 goto return_bad_req;
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4437 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4438
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4439 /* waiting for the last bits to leave the buffer */
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4440 if (req->flags & BF_SHUTW) {
4441 if (!(s->flags & SN_ERR_MASK))
4442 s->flags |= SN_ERR_SRVCL;
4443 if (!(s->flags & SN_FINST_MASK))
4444 s->flags |= SN_FINST_D;
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4445 goto return_bad_req;
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4446 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4447
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4448 /* When TE: chunked is used, we need to get there again to parse remaining
4449 * chunks even if the client has closed, so we don't want to set BF_DONTCLOSE.
4450 */
4451 if (txn->flags & TX_REQ_TE_CHNK)
4452 buffer_dont_close(req);
4453
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4454 http_silent_debug(__LINE__, s);
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4455 return 0;
4456
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4457 return_bad_req: /* let's centralize all bad requests */
4458 txn->req.msg_state = HTTP_MSG_ERROR;
4459 txn->status = 400;
4460 /* Note: we don't send any error if some data were already sent */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]4461 stream_int_retnclose(req->prod, (txn->rsp.msg_state < HTTP_MSG_BODY) ? error_message(s, HTTP_ERR_400) : NULL);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4462 req->analysers = 0;
4463 s->fe->counters.failed_req++;
4464 if (s->listener->counters)
4465 s->listener->counters->failed_req++;
4466
4467 if (!(s->flags & SN_ERR_MASK))
4468 s->flags |= SN_ERR_PRXCOND;
4469 if (!(s->flags & SN_FINST_MASK))
4470 s->flags |= SN_FINST_R;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4471 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4472 return 0;
4473}
4474
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4475/* This stream analyser waits for a complete HTTP response. It returns 1 if the
4476 * processing can continue on next analysers, or zero if it either needs more
4477 * data or wants to immediately abort the response (eg: timeout, error, ...). It
4478 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
4479 * when it has nothing left to do, and may remove any analyser when it wants to
4480 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4481 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4482int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4483{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4484 struct http_txn *txn = &s->txn;
4485 struct http_msg *msg = &txn->rsp;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4486 struct hdr_ctx ctx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4487 int use_close_only;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4488 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4489 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]4490
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4491 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]4492 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4493 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4494 rep,
4495 rep->rex, rep->wex,
4496 rep->flags,
4497 rep->l,
4498 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]4499
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4500 /*
4501 * Now parse the partial (or complete) lines.
4502 * We will check the response syntax, and also join multi-line
4503 * headers. An index of all the lines will be elaborated while
4504 * parsing.
4505 *
4506 * For the parsing, we use a 28 states FSM.
4507 *
4508 * Here is the information we currently have :
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4509 * rep->data + msg->som = beginning of response
4510 * rep->data + msg->eoh = end of processed headers / start of current one
4511 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4512 * rep->lr = first non-visited byte
4513 * rep->r = end of data
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4514 * Once we reach MSG_BODY, rep->sol = rep->data + msg->som
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4515 */
4516
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4517 /* There's a protected area at the end of the buffer for rewriting
4518 * purposes. We don't want to start to parse the request if the
4519 * protected area is affected, because we may have to move processed
4520 * data later, which is much more complicated.
4521 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4522 if (rep->l && msg->msg_state < HTTP_MSG_ERROR) {
4523 if (unlikely((rep->flags & BF_FULL) ||
4524 rep->r < rep->lr ||
4525 rep->r > rep->data + rep->size - global.tune.maxrewrite)) {
4526 if (rep->send_max) {
4527 /* some data has still not left the buffer, wake us once that's done */
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4528 if (rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
4529 goto abort_response;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4530 buffer_dont_close(rep);
4531 rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
4532 return 0;
4533 }
4534 if (rep->l <= rep->size - global.tune.maxrewrite)
4535 http_buffer_heavy_realign(rep, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4536 }
4537
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4538 if (likely(rep->lr < rep->r))
4539 http_msg_analyzer(rep, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4540 }
4541
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4542 /* 1: we might have to print this header in debug mode */
4543 if (unlikely((global.mode & MODE_DEBUG) &&
4544 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]4545 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4546 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4547 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4548
Willy Tarreau663308b2010-06-07 14:06:08 +0200[diff] [blame]4549 sol = rep->data + msg->som;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]4550 eol = sol + msg->sl.st.l;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4551 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4552
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4553 sol += hdr_idx_first_pos(&txn->hdr_idx);
4554 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4555
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4556 while (cur_idx) {
4557 eol = sol + txn->hdr_idx.v[cur_idx].len;
4558 debug_hdr("srvhdr", s, sol, eol);
4559 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
4560 cur_idx = txn->hdr_idx.v[cur_idx].next;
4561 }
4562 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4563
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4564 /*
4565 * Now we quickly check if we have found a full valid response.
4566 * If not so, we check the FD and buffer states before leaving.
4567 * A full response is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4568 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4569 * responses are checked first.
4570 *
4571 * Depending on whether the client is still there or not, we
4572 * may send an error response back or not. Note that normally
4573 * we should only check for HTTP status there, and check I/O
4574 * errors somewhere else.
4575 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4576
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4577 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4578 /* Invalid response */
4579 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4580 /* we detected a parsing error. We want to archive this response
4581 * in the dedicated proxy area for later troubleshooting.
4582 */
4583 hdr_response_bad:
4584 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
4585 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
4586
4587 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4588 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4589 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4590 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
4591 }
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4592 abort_response:
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4593 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4594 rep->analysers = 0;
4595 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4596 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4597 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4598 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
4599
4600 if (!(s->flags & SN_ERR_MASK))
4601 s->flags |= SN_ERR_PRXCOND;
4602 if (!(s->flags & SN_FINST_MASK))
4603 s->flags |= SN_FINST_H;
4604
4605 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4606 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4607
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4608 /* too large response does not fit in buffer. */
4609 else if (rep->flags & BF_FULL) {
4610 goto hdr_response_bad;
4611 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4612
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4613 /* read error */
4614 else if (rep->flags & BF_READ_ERROR) {
4615 if (msg->err_pos >= 0)
4616 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4617
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4618 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4619 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4620 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4621 health_adjust(s->srv, HANA_STATUS_HTTP_READ_ERROR);
4622 }
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]4623
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4624 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4625 rep->analysers = 0;
4626 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4627 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4628 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4629 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4630
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4631 if (!(s->flags & SN_ERR_MASK))
4632 s->flags |= SN_ERR_SRVCL;
4633 if (!(s->flags & SN_FINST_MASK))
4634 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]4635 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4636 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4637
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4638 /* read timeout : return a 504 to the client. */
4639 else if (rep->flags & BF_READ_TIMEOUT) {
4640 if (msg->err_pos >= 0)
4641 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4642
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4643 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4644 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4645 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4646 health_adjust(s->srv, HANA_STATUS_HTTP_READ_TIMEOUT);
4647 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4648
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4649 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4650 rep->analysers = 0;
4651 txn->status = 504;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4652 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4653 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4654 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4655
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4656 if (!(s->flags & SN_ERR_MASK))
4657 s->flags |= SN_ERR_SRVTO;
4658 if (!(s->flags & SN_FINST_MASK))
4659 s->flags |= SN_FINST_H;
4660 return 0;
4661 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]4662
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4663 /* close from server */
4664 else if (rep->flags & BF_SHUTR) {
4665 if (msg->err_pos >= 0)
4666 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4667
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4668 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4669 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4670 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4671 health_adjust(s->srv, HANA_STATUS_HTTP_BROKEN_PIPE);
4672 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4673
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4674 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4675 rep->analysers = 0;
4676 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4677 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4678 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4679 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4680
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4681 if (!(s->flags & SN_ERR_MASK))
4682 s->flags |= SN_ERR_SRVCL;
4683 if (!(s->flags & SN_FINST_MASK))
4684 s->flags |= SN_FINST_H;
4685 return 0;
4686 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4687
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4688 /* write error to client (we don't send any message then) */
4689 else if (rep->flags & BF_WRITE_ERROR) {
4690 if (msg->err_pos >= 0)
4691 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4692
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4693 s->be->counters.failed_resp++;
4694 rep->analysers = 0;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4695 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4696
4697 if (!(s->flags & SN_ERR_MASK))
4698 s->flags |= SN_ERR_CLICL;
4699 if (!(s->flags & SN_FINST_MASK))
4700 s->flags |= SN_FINST_H;
4701
4702 /* process_session() will take care of the error */
4703 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4704 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4705
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4706 buffer_dont_close(rep);
4707 return 0;
4708 }
4709
4710 /* More interesting part now : we know that we have a complete
4711 * response which at least looks like HTTP. We have an indicator
4712 * of each header's length, so we can parse them quickly.
4713 */
4714
4715 if (unlikely(msg->err_pos >= 0))
4716 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
4717
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4718 /*
4719 * 1: get the status code
4720 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4721 n = msg->sol[msg->sl.st.c] - '0';
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4722 if (n < 1 || n > 5)
4723 n = 0;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4724 /* when the client triggers a 4xx from the server, it's most often due
4725 * to a missing object or permission. These events should be tracked
4726 * because if they happen often, it may indicate a brute force or a
4727 * vulnerability scan.
4728 */
4729 if (n == 4)
4730 session_inc_http_err_ctr(s);
4731
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4732 if (s->srv)
4733 s->srv->counters.p.http.rsp[n]++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4734
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4735 /* check if the response is HTTP/1.1 or above */
4736 if ((msg->sl.st.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4737 ((msg->sol[5] > '1') ||
4738 ((msg->sol[5] == '1') &&
4739 (msg->sol[7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4740 txn->flags |= TX_RES_VER_11;
4741
4742 /* "connection" has not been parsed yet */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4743 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]4744
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4745 /* transfer length unknown*/
4746 txn->flags &= ~TX_RES_XFER_LEN;
4747
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4748 txn->status = strl2ui(msg->sol + msg->sl.st.c, msg->sl.st.c_l);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4749
Willy Tarreau39650402010-03-15 19:44:39 +0100[diff] [blame]4750 /* Adjust server's health based on status code. Note: status codes 501
4751 * and 505 are triggered on demand by client request, so we must not
4752 * count them as server failures.
4753 */
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4754 if (s->srv) {
4755 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
4756 health_adjust(s->srv, HANA_STATUS_HTTP_OK);
4757 else
4758 health_adjust(s->srv, HANA_STATUS_HTTP_STS);
4759 }
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4760
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4761 /*
4762 * 2: check for cacheability.
4763 */
4764
4765 switch (txn->status) {
4766 case 200:
4767 case 203:
4768 case 206:
4769 case 300:
4770 case 301:
4771 case 410:
4772 /* RFC2616 @13.4:
4773 * "A response received with a status code of
4774 * 200, 203, 206, 300, 301 or 410 MAY be stored
4775 * by a cache (...) unless a cache-control
4776 * directive prohibits caching."
4777 *
4778 * RFC2616 @9.5: POST method :
4779 * "Responses to this method are not cacheable,
4780 * unless the response includes appropriate
4781 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4782 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4783 if (likely(txn->meth != HTTP_METH_POST) &&
4784 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
4785 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4786 break;
4787 default:
4788 break;
4789 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4790
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4791 /*
4792 * 3: we may need to capture headers
4793 */
4794 s->logs.logwait &= ~LW_RESP;
4795 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4796 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4797 txn->rsp.cap, s->fe->rsp_cap);
4798
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4799 /* 4: determine the transfer-length.
4800 * According to RFC2616 #4.4, amended by the HTTPbis working group,
4801 * the presence of a message-body in a RESPONSE and its transfer length
4802 * must be determined that way :
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4803 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4804 * All responses to the HEAD request method MUST NOT include a
4805 * message-body, even though the presence of entity-header fields
4806 * might lead one to believe they do. All 1xx (informational), 204
4807 * (No Content), and 304 (Not Modified) responses MUST NOT include a
4808 * message-body. All other responses do include a message-body,
4809 * although it MAY be of zero length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4810 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4811 * 1. Any response which "MUST NOT" include a message-body (such as the
4812 * 1xx, 204 and 304 responses and any response to a HEAD request) is
4813 * always terminated by the first empty line after the header fields,
4814 * regardless of the entity-header fields present in the message.
4815 *
4816 * 2. If a Transfer-Encoding header field (Section 9.7) is present and
4817 * the "chunked" transfer-coding (Section 6.2) is used, the
4818 * transfer-length is defined by the use of this transfer-coding.
4819 * If a Transfer-Encoding header field is present and the "chunked"
4820 * transfer-coding is not present, the transfer-length is defined by
4821 * the sender closing the connection.
4822 *
4823 * 3. If a Content-Length header field is present, its decimal value in
4824 * OCTETs represents both the entity-length and the transfer-length.
4825 * If a message is received with both a Transfer-Encoding header
4826 * field and a Content-Length header field, the latter MUST be ignored.
4827 *
4828 * 4. If the message uses the media type "multipart/byteranges", and
4829 * the transfer-length is not otherwise specified, then this self-
4830 * delimiting media type defines the transfer-length. This media
4831 * type MUST NOT be used unless the sender knows that the recipient
4832 * can parse it; the presence in a request of a Range header with
4833 * multiple byte-range specifiers from a 1.1 client implies that the
4834 * client can parse multipart/byteranges responses.
4835 *
4836 * 5. By the server closing the connection.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4837 */
4838
4839 /* Skip parsing if no content length is possible. The response flags
4840 * remain 0 as well as the hdr_content_len, which may or may not mirror
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4841 * the real header value, and we note that we know the response's length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4842 * FIXME: should we parse anyway and return an error on chunked encoding ?
4843 */
4844 if (txn->meth == HTTP_METH_HEAD ||
4845 (txn->status >= 100 && txn->status < 200) ||
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4846 txn->status == 204 || txn->status == 304) {
4847 txn->flags |= TX_RES_XFER_LEN;
4848 goto skip_content_length;
4849 }
4850
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4851 use_close_only = 0;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4852 ctx.idx = 0;
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]4853 while ((txn->flags & TX_RES_VER_11) &&
4854 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4855 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
4856 txn->flags |= (TX_RES_TE_CHNK | TX_RES_XFER_LEN);
4857 else if (txn->flags & TX_RES_TE_CHNK) {
4858 /* bad transfer-encoding (chunked followed by something else) */
4859 use_close_only = 1;
4860 txn->flags &= ~(TX_RES_TE_CHNK | TX_RES_XFER_LEN);
4861 break;
4862 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4863 }
4864
4865 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
4866 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4867 while (!(txn->flags & TX_RES_TE_CHNK) && !use_close_only &&
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4868 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
4869 signed long long cl;
4870
4871 if (!ctx.vlen)
4872 goto hdr_response_bad;
4873
4874 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
4875 goto hdr_response_bad; /* parse failure */
4876
4877 if (cl < 0)
4878 goto hdr_response_bad;
4879
4880 if ((txn->flags & TX_RES_CNT_LEN) && (msg->hdr_content_len != cl))
4881 goto hdr_response_bad; /* already specified, was different */
4882
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4883 txn->flags |= TX_RES_CNT_LEN | TX_RES_XFER_LEN;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4884 msg->hdr_content_len = cl;
4885 }
4886
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4887 /* FIXME: we should also implement the multipart/byterange method.
4888 * For now on, we resort to close mode in this case (unknown length).
4889 */
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4890skip_content_length:
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4891
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4892 /* end of job, return OK */
4893 rep->analysers &= ~an_bit;
4894 rep->analyse_exp = TICK_ETERNITY;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4895 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4896 return 1;
4897}
4898
4899/* This function performs all the processing enabled for the current response.
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]4900 * It normally returns 1 unless it wants to break. It relies on buffers flags,
4901 * and updates t->rep->analysers. It might make sense to explode it into several
4902 * other functions. It works like process_request (see indications above).
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4903 */
4904int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
4905{
4906 struct http_txn *txn = &t->txn;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4907 struct http_msg *msg = &txn->rsp;
4908 struct proxy *cur_proxy;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]4909 struct cond_wordlist *wl;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4910
4911 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
4912 now_ms, __FUNCTION__,
4913 t,
4914 rep,
4915 rep->rex, rep->wex,
4916 rep->flags,
4917 rep->l,
4918 rep->analysers);
4919
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4920 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4921 return 0;
4922
4923 rep->analysers &= ~an_bit;
4924 rep->analyse_exp = TICK_ETERNITY;
4925
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4926 /* Now we have to check if we need to modify the Connection header.
4927 * This is more difficult on the response than it is on the request,
4928 * because we can have two different HTTP versions and we don't know
4929 * how the client will interprete a response. For instance, let's say
4930 * that the client sends a keep-alive request in HTTP/1.0 and gets an
4931 * HTTP/1.1 response without any header. Maybe it will bound itself to
4932 * HTTP/1.0 because it only knows about it, and will consider the lack
4933 * of header as a close, or maybe it knows HTTP/1.1 and can consider
4934 * the lack of header as a keep-alive. Thus we will use two flags
4935 * indicating how a request MAY be understood by the client. In case
4936 * of multiple possibilities, we'll fix the header to be explicit. If
4937 * ambiguous cases such as both close and keepalive are seen, then we
4938 * will fall back to explicit close. Note that we won't take risks with
4939 * HTTP/1.0 clients which may not necessarily understand keep-alive.
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4940 * See doc/internals/connection-header.txt for the complete matrix.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4941 */
4942
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4943 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
4944 txn->status == 101)) {
4945 /* Either we've established an explicit tunnel, or we're
4946 * switching the protocol. In both cases, we're very unlikely
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4947 * to understand the next protocols. We have to switch to tunnel
4948 * mode, so that we transfer the request and responses then let
4949 * this protocol pass unmodified. When we later implement specific
4950 * parsers for such protocols, we'll want to check the Upgrade
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4951 * header which contains information about that protocol for
4952 * responses with status 101 (eg: see RFC2817 about TLS).
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4953 */
4954 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
4955 }
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4956 else if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) &&
4957 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN ||
4958 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE))) {
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4959 int to_del = 0;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4960
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4961 /* on unknown transfer length, we must close */
4962 if (!(txn->flags & TX_RES_XFER_LEN) &&
4963 (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
4964 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4965
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4966 /* now adjust header transformations depending on current state */
4967 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN ||
4968 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4969 to_del |= 2; /* remove "keep-alive" on any response */
4970 if (!(txn->flags & TX_RES_VER_11))
4971 to_del |= 1; /* remove "close" for HTTP/1.0 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4972 }
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4973 else { /* SCL / KAL */
4974 to_del |= 1; /* remove "close" on any response */
4975 if ((txn->flags & (TX_RES_VER_11|TX_REQ_VER_11)) == (TX_RES_VER_11|TX_REQ_VER_11))
4976 to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4977 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4978
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4979 /* Parse and remove some headers from the connection header */
4980 http_parse_connection_header(txn, msg, rep, to_del);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4981
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4982 /* Some keep-alive responses are converted to Server-close if
4983 * the server wants to close.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4984 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4985 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) {
4986 if ((txn->flags & TX_HDR_CONN_CLO) ||
4987 (txn->flags & (TX_HDR_CONN_KAL|TX_RES_VER_11)) == 0)
4988 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4989 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4990 }
4991
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4992 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4993 /*
4994 * 3: we will have to evaluate the filters.
4995 * As opposed to version 1.2, now they will be evaluated in the
4996 * filters order and not in the header order. This means that
4997 * each filter has to be validated among all headers.
4998 *
4999 * Filters are tried with ->be first, then with ->fe if it is
5000 * different from ->be.
5001 */
5002
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5003 cur_proxy = t->be;
5004 while (1) {
5005 struct proxy *rule_set = cur_proxy;
5006
5007 /* try headers filters */
5008 if (rule_set->rsp_exp != NULL) {
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5009 if (apply_filters_to_response(t, rep, rule_set) < 0) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5010 return_bad_resp:
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]5011 if (t->srv) {
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5012 t->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]5013 health_adjust(t->srv, HANA_STATUS_HTTP_RSP);
5014 }
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5015 cur_proxy->counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5016 return_srv_prx_502:
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]5017 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5018 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]5019 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]5020 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreau8e89b842009-10-18 23:56:35 +0200[diff] [blame]5021 stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5022 if (!(t->flags & SN_ERR_MASK))
5023 t->flags |= SN_ERR_PRXCOND;
5024 if (!(t->flags & SN_FINST_MASK))
5025 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]5026 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5027 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5028 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5029
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5030 /* has the response been denied ? */
5031 if (txn->flags & TX_SVDENY) {
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]5032 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5033 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5034
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5035 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5036 if (t->listener->counters)
5037 t->listener->counters->denied_resp++;
5038
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5039 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]5040 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5041
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5042 /* add response headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]5043 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]5044 if (txn->status < 200)
5045 break;
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5046 if (wl->cond) {
5047 int ret = acl_exec_cond(wl->cond, px, t, txn, ACL_DIR_RTR);
5048 ret = acl_pass(ret);
5049 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
5050 ret = !ret;
5051 if (!ret)
5052 continue;
5053 }
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]5054 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]5055 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]5056 }
5057
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5058 /* check whether we're already working on the frontend */
5059 if (cur_proxy == t->fe)
5060 break;
5061 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5062 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5063
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5064 /*
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5065 * We may be facing a 100-continue response, in which case this
5066 * is not the right response, and we're waiting for the next one.
5067 * Let's allow this response to go to the client and wait for the
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5068 * next one.
5069 */
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5070 if (unlikely(txn->status == 100)) {
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5071 hdr_idx_init(&txn->hdr_idx);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5072 buffer_forward(rep, rep->lr - msg->sol);
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5073 msg->msg_state = HTTP_MSG_RPBEFORE;
5074 txn->status = 0;
5075 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
5076 return 1;
5077 }
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5078 else if (unlikely(txn->status < 200))
5079 goto skip_header_mangling;
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5080
5081 /* we don't have any 1xx status code now */
5082
5083 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5084 * 4: check for server cookie.
5085 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5086 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name ||
5087 (t->be->options & PR_O_CHK_CACHE))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5088 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5089
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5090
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5091 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5092 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5093 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5094 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5095 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5096
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5097 /*
5098 * 6: add server cookie in the response if needed
5099 */
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5100 if ((t->srv) && (t->be->options & PR_O_COOK_INS) &&
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]5101 !((txn->flags & TX_SCK_FOUND) && (t->be->options2 & PR_O2_COOK_PSV)) &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5102 (!(t->flags & SN_DIRECT) ||
5103 ((t->be->cookie_maxidle || txn->cookie_last_date) &&
5104 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
5105 (t->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
5106 (!t->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]5107 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) &&
5108 !(t->flags & SN_IGNORE_PRST)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5109 int len;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5110 /* the server is known, it's not the one the client requested, or the
5111 * cookie's last seen date needs to be refreshed. We have to
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5112 * insert a set-cookie here, except if we want to insert only on POST
5113 * requests and this one isn't. Note that servers which don't have cookies
5114 * (eg: some backup servers) will return a full cookie removal request.
5115 */
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5116 if (!t->srv->cookie) {
5117 len = sprintf(trash,
5118 "Set-Cookie: %s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
5119 t->be->cookie_name);
5120 }
5121 else {
5122 len = sprintf(trash, "Set-Cookie: %s=%s", t->be->cookie_name, t->srv->cookie);
5123
5124 if (t->be->cookie_maxidle || t->be->cookie_maxlife) {
5125 /* emit last_date, which is mandatory */
5126 trash[len++] = COOKIE_DELIM_DATE;
5127 s30tob64((date.tv_sec+3) >> 2, trash + len); len += 5;
5128 if (t->be->cookie_maxlife) {
5129 /* emit first_date, which is either the original one or
5130 * the current date.
5131 */
5132 trash[len++] = COOKIE_DELIM_DATE;
5133 s30tob64(txn->cookie_first_date ?
5134 txn->cookie_first_date >> 2 :
5135 (date.tv_sec+3) >> 2, trash + len);
5136 len += 5;
5137 }
5138 }
5139 len += sprintf(trash + len, "; path=/");
5140 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5141
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5142 if (t->be->cookie_domain)
5143 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5144
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5145 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]5146 trash, len) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5147 goto return_bad_resp;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5148
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5149 txn->flags &= ~TX_SCK_MASK;
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]5150 if (t->srv->cookie && (t->flags & SN_DIRECT))
5151 /* the server did not change, only the date was updated */
5152 txn->flags |= TX_SCK_UPDATED;
5153 else
5154 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5155
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5156 /* Here, we will tell an eventual cache on the client side that we don't
5157 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
5158 * Some caches understand the correct form: 'no-cache="set-cookie"', but
5159 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
5160 */
5161 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5162
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5163 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
5164
5165 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]5166 "Cache-control: private", 22) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5167 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5168 }
5169 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5170
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5171 /*
5172 * 7: check if result will be cacheable with a cookie.
5173 * We'll block the response if security checks have caught
5174 * nasty things such as a cacheable cookie.
5175 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]5176 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
5177 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5178 (t->be->options & PR_O_CHK_CACHE)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5179
5180 /* we're in presence of a cacheable response containing
5181 * a set-cookie header. We'll block it as requested by
5182 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5183 */
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]5184 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5185 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5186
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5187 cur_proxy->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 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
5192 t->be->id, t->srv?t->srv->id:"<dispatch>");
5193 send_log(t->be, LOG_ALERT,
5194 "Blocking cacheable cookie in response from instance %s, server %s.\n",
5195 t->be->id, t->srv?t->srv->id:"<dispatch>");
5196 goto return_srv_prx_502;
5197 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5198
5199 /*
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5200 * 8: adjust "Connection: close" or "Connection: keep-alive" if needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5201 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5202 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
5203 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE)) {
5204 unsigned int want_flags = 0;
5205
5206 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5207 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
5208 /* we want a keep-alive response here. Keep-alive header
5209 * required if either side is not 1.1.
5210 */
5211 if ((txn->flags & (TX_REQ_VER_11|TX_RES_VER_11)) != (TX_REQ_VER_11|TX_RES_VER_11))
5212 want_flags |= TX_CON_KAL_SET;
5213 }
5214 else {
5215 /* we want a close response here. Close header required if
5216 * the server is 1.1, regardless of the client.
5217 */
5218 if (txn->flags & TX_RES_VER_11)
5219 want_flags |= TX_CON_CLO_SET;
5220 }
5221
5222 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
5223 http_change_connection_header(txn, msg, rep, want_flags);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5224 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5225
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5226 skip_header_mangling:
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5227 if ((txn->flags & TX_RES_XFER_LEN) ||
5228 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5229 rep->analysers |= AN_RES_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]5230
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5231 /*************************************************************
5232 * OK, that's finished for the headers. We have done what we *
5233 * could. Let's switch to the DATA state. *
5234 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5235
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5236 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5237
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5238 /* if the user wants to log as soon as possible, without counting
5239 * bytes from the server, then this is the right moment. We have
5240 * to temporarily assign bytes_out to log what we currently have.
5241 */
5242 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
5243 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
5244 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]5245 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5246 t->logs.bytes_out = 0;
5247 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5248
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5249 /* Note: we must not try to cheat by jumping directly to DATA,
5250 * otherwise we would not let the client side wake up.
5251 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5252
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5253 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5254 }
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5255 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5256}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5257
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5258/* This function is an analyser which forwards response body (including chunk
5259 * sizes if any). It is called as soon as we must forward, even if we forward
5260 * zero byte. The only situation where it must not be called is when we're in
5261 * tunnel mode and we want to forward till the close. It's used both to forward
5262 * remaining data and to resync after end of body. It expects the msg_state to
5263 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
5264 * read more data, or 1 once we can go on with next request or end the session.
5265 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
5266 * bytes of pending data + the headers if not already done (between som and sov).
5267 * It eventually adjusts som to match sov after the data in between have been sent.
5268 */
5269int http_response_forward_body(struct session *s, struct buffer *res, int an_bit)
5270{
5271 struct http_txn *txn = &s->txn;
5272 struct http_msg *msg = &s->txn.rsp;
5273
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5274 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
5275 return 0;
5276
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5277 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]5278 ((res->flags & BF_SHUTW) && (res->to_forward || res->send_max)) ||
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5279 !s->req->analysers) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5280 /* Output closed while we were sending data. We must abort and
5281 * wake the other side up.
5282 */
5283 msg->msg_state = HTTP_MSG_ERROR;
5284 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]5285 return 1;
5286 }
5287
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5288 /* in most states, we should abort in case of early close */
5289 buffer_auto_close(res);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5290
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5291 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
5292 /* we have msg->col and msg->sov which both point to the first
5293 * byte of message body. msg->som still points to the beginning
5294 * of the message. We must save the body in req->lr because it
5295 * survives buffer re-alignments.
5296 */
5297 res->lr = res->data + msg->sov;
5298 if (txn->flags & TX_RES_TE_CHNK)
5299 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
5300 else {
5301 msg->msg_state = HTTP_MSG_DATA;
5302 }
5303 }
5304
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5305 while (1) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5306 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5307 /* we may have some data pending */
5308 if (msg->hdr_content_len || msg->som != msg->sov) {
5309 int bytes = msg->sov - msg->som;
5310 if (bytes < 0) /* sov may have wrapped at the end */
5311 bytes += res->size;
5312 buffer_forward(res, bytes + msg->hdr_content_len);
5313 msg->hdr_content_len = 0; /* don't forward that again */
5314 msg->som = msg->sov;
5315 }
5316
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5317 if (msg->msg_state == HTTP_MSG_DATA) {
5318 /* must still forward */
5319 if (res->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5320 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5321
5322 /* nothing left to forward */
5323 if (txn->flags & TX_RES_TE_CHNK)
5324 msg->msg_state = HTTP_MSG_DATA_CRLF;
5325 else
5326 msg->msg_state = HTTP_MSG_DONE;
5327 }
5328 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5329 /* read the chunk size and assign it to ->hdr_content_len, then
5330 * set ->sov to point to the body and switch to DATA or TRAILERS state.
5331 */
5332 int ret = http_parse_chunk_size(res, msg);
5333
5334 if (!ret)
5335 goto missing_data;
5336 else if (ret < 0)
5337 goto return_bad_res;
5338 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5339 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5340 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
5341 /* we want the CRLF after the data */
5342 int ret;
5343
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]5344 res->lr = res->w + res->send_max;
5345 if (res->lr >= res->data + res->size)
5346 res->lr -= res->size;
5347
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5348 ret = http_skip_chunk_crlf(res, msg);
5349
5350 if (!ret)
5351 goto missing_data;
5352 else if (ret < 0)
5353 goto return_bad_res;
5354 /* we're in MSG_CHUNK_SIZE now */
5355 }
5356 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
5357 int ret = http_forward_trailers(res, msg);
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5358
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5359 if (ret == 0)
5360 goto missing_data;
5361 else if (ret < 0)
5362 goto return_bad_res;
5363 /* we're in HTTP_MSG_DONE now */
5364 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5365 else {
5366 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5367 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5368 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5369 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5370 buffer_dont_close(res);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5371 if (http_resync_states(s)) {
5372 http_silent_debug(__LINE__, s);
5373 /* some state changes occurred, maybe the analyser
5374 * was disabled too.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5375 */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5376 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
5377 goto return_bad_res;
5378 return 1;
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5379 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5380 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5381 }
5382 }
5383
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5384 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5385 /* stop waiting for data if the input is closed before the end */
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5386 if (res->flags & BF_SHUTR) {
5387 if (!(s->flags & SN_ERR_MASK))
5388 s->flags |= SN_ERR_SRVCL;
Willy Tarreauae526782010-03-04 20:34:23 +0100[diff] [blame]5389 s->be->counters.srv_aborts++;
5390 if (s->srv)
5391 s->srv->counters.srv_aborts++;
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5392 goto return_bad_res;
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5393 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5394
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5395 /* we need to obey the req analyser, so if it leaves, we must too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5396 if (!s->req->analysers)
5397 goto return_bad_res;
5398
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5399 /* forward the chunk size as well as any pending data */
5400 if (msg->hdr_content_len || msg->som != msg->sov) {
5401 buffer_forward(res, msg->sov - msg->som + msg->hdr_content_len);
5402 msg->hdr_content_len = 0; /* don't forward that again */
5403 msg->som = msg->sov;
5404 }
5405
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5406 /* When TE: chunked is used, we need to get there again to parse remaining
5407 * chunks even if the server has closed, so we don't want to set BF_DONTCLOSE.
5408 * Similarly, with keep-alive on the client side, we don't want to forward a
5409 * close.
5410 */
5411 if ((txn->flags & TX_RES_TE_CHNK) ||
5412 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5413 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5414 buffer_dont_close(res);
5415
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5416 /* the session handler will take care of timeouts and errors */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5417 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5418 return 0;
5419
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5420 return_bad_res: /* let's centralize all bad responses */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5421 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]5422 /* don't send any error message as we're in the body */
5423 stream_int_retnclose(res->cons, NULL);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5424 res->analysers = 0;
5425 s->be->counters.failed_resp++;
5426 if (s->srv) {
5427 s->srv->counters.failed_resp++;
5428 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
5429 }
5430
5431 if (!(s->flags & SN_ERR_MASK))
5432 s->flags |= SN_ERR_PRXCOND;
5433 if (!(s->flags & SN_FINST_MASK))
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5434 s->flags |= SN_FINST_D;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5435 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5436 return 0;
5437}
5438
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5439/* Iterate the same filter through all request headers.
5440 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5441 * Since it can manage the switch to another backend, it updates the per-proxy
5442 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5443 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5444int 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]5445{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5446 char term;
5447 char *cur_ptr, *cur_end, *cur_next;
5448 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5449 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5450 struct hdr_idx_elem *cur_hdr;
5451 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]5452
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5453 last_hdr = 0;
5454
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5455 cur_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5456 old_idx = 0;
5457
5458 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5459 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5460 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5461 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5462 (exp->action == ACT_ALLOW ||
5463 exp->action == ACT_DENY ||
5464 exp->action == ACT_TARPIT))
5465 return 0;
5466
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5467 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5468 if (!cur_idx)
5469 break;
5470
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5471 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5472 cur_ptr = cur_next;
5473 cur_end = cur_ptr + cur_hdr->len;
5474 cur_next = cur_end + cur_hdr->cr + 1;
5475
5476 /* Now we have one header between cur_ptr and cur_end,
5477 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5478 */
5479
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5480 /* The annoying part is that pattern matching needs
5481 * that we modify the contents to null-terminate all
5482 * strings before testing them.
5483 */
5484
5485 term = *cur_end;
5486 *cur_end = '\0';
5487
5488 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5489 switch (exp->action) {
5490 case ACT_SETBE:
5491 /* It is not possible to jump a second time.
5492 * FIXME: should we return an HTTP/500 here so that
5493 * the admin knows there's a problem ?
5494 */
5495 if (t->be != t->fe)
5496 break;
5497
5498 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5499 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5500 last_hdr = 1;
5501 break;
5502
5503 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5504 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5505 last_hdr = 1;
5506 break;
5507
5508 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5509 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5510 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5511
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5512 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5513 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5514 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5515
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5516 break;
5517
5518 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5519 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5520 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5521
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5522 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5523 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5524 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5525
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5526 break;
5527
5528 case ACT_REPLACE:
5529 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5530 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5531 /* FIXME: if the user adds a newline in the replacement, the
5532 * index will not be recalculated for now, and the new line
5533 * will not be counted as a new header.
5534 */
5535
5536 cur_end += delta;
5537 cur_next += delta;
5538 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5539 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5540 break;
5541
5542 case ACT_REMOVE:
5543 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
5544 cur_next += delta;
5545
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5546 http_msg_move_end(&txn->req, delta);
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5547 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5548 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5549 cur_hdr->len = 0;
5550 cur_end = NULL; /* null-term has been rewritten */
5551 break;
5552
5553 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5554 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5555 if (cur_end)
5556 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5557
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5558 /* keep the link from this header to next one in case of later
5559 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5560 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5561 old_idx = cur_idx;
5562 }
5563 return 0;
5564}
5565
5566
5567/* Apply the filter to the request line.
5568 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5569 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5570 * Since it can manage the switch to another backend, it updates the per-proxy
5571 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5572 */
5573int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
5574{
5575 char term;
5576 char *cur_ptr, *cur_end;
5577 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5578 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5579 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5580
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5581
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5582 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5583 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5584 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5585 (exp->action == ACT_ALLOW ||
5586 exp->action == ACT_DENY ||
5587 exp->action == ACT_TARPIT))
5588 return 0;
5589 else if (exp->action == ACT_REMOVE)
5590 return 0;
5591
5592 done = 0;
5593
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5594 cur_ptr = txn->req.sol;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5595 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5596
5597 /* Now we have the request line between cur_ptr and cur_end */
5598
5599 /* The annoying part is that pattern matching needs
5600 * that we modify the contents to null-terminate all
5601 * strings before testing them.
5602 */
5603
5604 term = *cur_end;
5605 *cur_end = '\0';
5606
5607 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5608 switch (exp->action) {
5609 case ACT_SETBE:
5610 /* It is not possible to jump a second time.
5611 * FIXME: should we return an HTTP/500 here so that
5612 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5613 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5614 if (t->be != t->fe)
5615 break;
5616
5617 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5618 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5619 done = 1;
5620 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5621
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5622 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5623 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5624 done = 1;
5625 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5626
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5627 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5628 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5629
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5630 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5631 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5632 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5633
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5634 done = 1;
5635 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5636
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5637 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5638 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5639
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5640 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5641 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5642 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5643
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5644 done = 1;
5645 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5646
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5647 case ACT_REPLACE:
5648 *cur_end = term; /* restore the string terminator */
5649 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5650 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5651 /* FIXME: if the user adds a newline in the replacement, the
5652 * index will not be recalculated for now, and the new line
5653 * will not be counted as a new header.
5654 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5655
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5656 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5657 cur_end += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5658 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5659 HTTP_MSG_RQMETH,
5660 cur_ptr, cur_end + 1,
5661 NULL, NULL);
5662 if (unlikely(!cur_end))
5663 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5664
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5665 /* we have a full request and we know that we have either a CR
5666 * or an LF at <ptr>.
5667 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5668 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
5669 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]5670 /* there is no point trying this regex on headers */
5671 return 1;
5672 }
5673 }
5674 *cur_end = term; /* restore the string terminator */
5675 return done;
5676}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]5677
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5678
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5679
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5680/*
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5681 * 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]5682 * 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]5683 * unparsable request. Since it can manage the switch to another backend, it
5684 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5685 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5686int apply_filters_to_request(struct session *s, struct buffer *req, struct proxy *px)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5687{
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5688 struct http_txn *txn = &s->txn;
5689 struct hdr_exp *exp;
5690
5691 for (exp = px->req_exp; exp; exp = exp->next) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5692 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5693
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5694 /*
5695 * The interleaving of transformations and verdicts
5696 * makes it difficult to decide to continue or stop
5697 * the evaluation.
5698 */
5699
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5700 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
5701 break;
5702
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5703 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5704 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5705 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5706 continue;
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5707
5708 /* if this filter had a condition, evaluate it now and skip to
5709 * next filter if the condition does not match.
5710 */
5711 if (exp->cond) {
5712 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_REQ);
5713 ret = acl_pass(ret);
5714 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
5715 ret = !ret;
5716
5717 if (!ret)
5718 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5719 }
5720
5721 /* Apply the filter to the request line. */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5722 ret = apply_filter_to_req_line(s, req, exp);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5723 if (unlikely(ret < 0))
5724 return -1;
5725
5726 if (likely(ret == 0)) {
5727 /* The filter did not match the request, it can be
5728 * iterated through all headers.
5729 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5730 apply_filter_to_req_headers(s, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5731 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5732 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5733 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5734}
5735
5736
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5737
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5738/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5739 * Try to retrieve the server associated to the appsession.
5740 * If the server is found, it's assigned to the session.
5741 */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5742void manage_client_side_appsession(struct session *t, const char *buf, int len) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5743 struct http_txn *txn = &t->txn;
5744 appsess *asession = NULL;
5745 char *sessid_temp = NULL;
5746
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5747 if (len > t->be->appsession_len) {
5748 len = t->be->appsession_len;
5749 }
5750
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5751 if (t->be->options2 & PR_O2_AS_REQL) {
5752 /* request-learn option is enabled : store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5753 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5754 /* 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]5755 pool_free2(apools.sessid, txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5756 }
5757
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5758 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5759 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5760 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5761 return;
5762 }
5763
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5764 memcpy(txn->sessid, buf, len);
5765 txn->sessid[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5766 }
5767
5768 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
5769 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5770 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5771 return;
5772 }
5773
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5774 memcpy(sessid_temp, buf, len);
5775 sessid_temp[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5776
5777 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
5778 /* free previously allocated memory */
5779 pool_free2(apools.sessid, sessid_temp);
5780
5781 if (asession != NULL) {
5782 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
5783 if (!(t->be->options2 & PR_O2_AS_REQL))
5784 asession->request_count++;
5785
5786 if (asession->serverid != NULL) {
5787 struct server *srv = t->be->srv;
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]5788
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5789 while (srv) {
5790 if (strcmp(srv->id, asession->serverid) == 0) {
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]5791 if ((srv->state & SRV_RUNNING) ||
5792 (t->be->options & PR_O_PERSIST) ||
5793 (t->flags & SN_FORCE_PRST)) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5794 /* we found the server and it's usable */
5795 txn->flags &= ~TX_CK_MASK;
Willy Tarreau2a6d88d2010-01-24 13:10:43 +0100[diff] [blame]5796 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5797 t->flags |= SN_DIRECT | SN_ASSIGNED;
5798 t->srv = srv;
5799 break;
5800 } else {
5801 txn->flags &= ~TX_CK_MASK;
5802 txn->flags |= TX_CK_DOWN;
5803 }
5804 }
5805 srv = srv->next;
5806 }
5807 }
5808 }
5809}
5810
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5811/* Find the end of a cookie value contained between <s> and <e>. It works the
5812 * same way as with headers above except that the semi-colon also ends a token.
5813 * See RFC2965 for more information. Note that it requires a valid header to
5814 * return a valid result.
5815 */
5816char *find_cookie_value_end(char *s, const char *e)
5817{
5818 int quoted, qdpair;
5819
5820 quoted = qdpair = 0;
5821 for (; s < e; s++) {
5822 if (qdpair) qdpair = 0;
5823 else if (quoted) {
5824 if (*s == '\\') qdpair = 1;
5825 else if (*s == '"') quoted = 0;
5826 }
5827 else if (*s == '"') quoted = 1;
5828 else if (*s == ',' || *s == ';') return s;
5829 }
5830 return s;
5831}
5832
5833/* Delete a value in a header between delimiters <from> and <next> in buffer
5834 * <buf>. The number of characters displaced is returned, and the pointer to
5835 * the first delimiter is updated if required. The function tries as much as
5836 * possible to respect the following principles :
5837 * - replace <from> delimiter by the <next> one unless <from> points to a
5838 * colon, in which case <next> is simply removed
5839 * - set exactly one space character after the new first delimiter, unless
5840 * there are not enough characters in the block being moved to do so.
5841 * - remove unneeded spaces before the previous delimiter and after the new
5842 * one.
5843 *
5844 * It is the caller's responsibility to ensure that :
5845 * - <from> points to a valid delimiter or the colon ;
5846 * - <next> points to a valid delimiter or the final CR/LF ;
5847 * - there are non-space chars before <from> ;
5848 * - there is a CR/LF at or after <next>.
5849 */
5850int del_hdr_value(struct buffer *buf, char **from, char *next)
5851{
5852 char *prev = *from;
5853
5854 if (*prev == ':') {
5855 /* We're removing the first value, preserve the colon and add a
5856 * space if possible.
5857 */
5858 if (!http_is_crlf[(unsigned char)*next])
5859 next++;
5860 prev++;
5861 if (prev < next)
5862 *prev++ = ' ';
5863
5864 while (http_is_spht[(unsigned char)*next])
5865 next++;
5866 } else {
5867 /* Remove useless spaces before the old delimiter. */
5868 while (http_is_spht[(unsigned char)*(prev-1)])
5869 prev--;
5870 *from = prev;
5871
5872 /* copy the delimiter and if possible a space if we're
5873 * not at the end of the line.
5874 */
5875 if (!http_is_crlf[(unsigned char)*next]) {
5876 *prev++ = *next++;
5877 if (prev + 1 < next)
5878 *prev++ = ' ';
5879 while (http_is_spht[(unsigned char)*next])
5880 next++;
5881 }
5882 }
5883 return buffer_replace2(buf, prev, next, NULL, 0);
5884}
5885
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5886/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]5887 * Manage client-side cookie. It can impact performance by about 2% so it is
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5888 * desirable to call it only when needed. This code is quite complex because
5889 * of the multiple very crappy and ambiguous syntaxes we have to support. it
5890 * highly recommended not to touch this part without a good reason !
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5891 */
5892void manage_client_side_cookies(struct session *t, struct buffer *req)
5893{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5894 struct http_txn *txn = &t->txn;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5895 int preserve_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5896 int cur_idx, old_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5897 char *hdr_beg, *hdr_end, *hdr_next, *del_from;
5898 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5899
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5900 /* Iterate through the headers, we start with the start line. */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]5901 old_idx = 0;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5902 hdr_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5903
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5904 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5905 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5906 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5907
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5908 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5909 hdr_beg = hdr_next;
5910 hdr_end = hdr_beg + cur_hdr->len;
5911 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5912
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5913 /* We have one full header between hdr_beg and hdr_end, and the
5914 * next header starts at hdr_next. We're only interested in
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5915 * "Cookie:" headers.
5916 */
5917
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5918 val = http_header_match2(hdr_beg, hdr_end, "Cookie", 6);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5919 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5920 old_idx = cur_idx;
5921 continue;
5922 }
5923
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5924 del_from = NULL; /* nothing to be deleted */
5925 preserve_hdr = 0; /* assume we may kill the whole header */
5926
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5927 /* Now look for cookies. Conforming to RFC2109, we have to support
5928 * attributes whose name begin with a '$', and associate them with
5929 * the right cookie, if we want to delete this cookie.
5930 * So there are 3 cases for each cookie read :
5931 * 1) it's a special attribute, beginning with a '$' : ignore it.
5932 * 2) it's a server id cookie that we *MAY* want to delete : save
5933 * some pointers on it (last semi-colon, beginning of cookie...)
5934 * 3) it's an application cookie : we *MAY* have to delete a previous
5935 * "special" cookie.
5936 * At the end of loop, if a "special" cookie remains, we may have to
5937 * remove it. If no application cookie persists in the header, we
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5938 * *MUST* delete it.
5939 *
5940 * Note: RFC2965 is unclear about the processing of spaces around
5941 * the equal sign in the ATTR=VALUE form. A careful inspection of
5942 * the RFC explicitly allows spaces before it, and not within the
5943 * tokens (attrs or values). An inspection of RFC2109 allows that
5944 * too but section 10.1.3 lets one think that spaces may be allowed
5945 * after the equal sign too, resulting in some (rare) buggy
5946 * implementations trying to do that. So let's do what servers do.
5947 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
5948 * allowed quoted strings in values, with any possible character
5949 * after a backslash, including control chars and delimitors, which
5950 * causes parsing to become ambiguous. Browsers also allow spaces
5951 * within values even without quotes.
5952 *
5953 * We have to keep multiple pointers in order to support cookie
5954 * removal at the beginning, middle or end of header without
5955 * corrupting the header. All of these headers are valid :
5956 *
5957 * Cookie:NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3\r\n
5958 * Cookie:NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3\r\n
5959 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
5960 * | | | | | | | | |
5961 * | | | | | | | | hdr_end <--+
5962 * | | | | | | | +--> next
5963 * | | | | | | +----> val_end
5964 * | | | | | +-----------> val_beg
5965 * | | | | +--------------> equal
5966 * | | | +----------------> att_end
5967 * | | +---------------------> att_beg
5968 * | +--------------------------> prev
5969 * +--------------------------------> hdr_beg
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5970 */
5971
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5972 for (prev = hdr_beg + 6; prev < hdr_end; prev = next) {
5973 /* Iterate through all cookies on this line */
5974
5975 /* find att_beg */
5976 att_beg = prev + 1;
5977 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
5978 att_beg++;
5979
5980 /* find att_end : this is the first character after the last non
5981 * space before the equal. It may be equal to hdr_end.
5982 */
5983 equal = att_end = att_beg;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5984
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5985 while (equal < hdr_end) {
5986 if (*equal == '=' || *equal == ',' || *equal == ';')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5987 break;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5988 if (http_is_spht[(unsigned char)*equal++])
5989 continue;
5990 att_end = equal;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5991 }
5992
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5993 /* here, <equal> points to '=', a delimitor or the end. <att_end>
5994 * is between <att_beg> and <equal>, both may be identical.
5995 */
5996
5997 /* look for end of cookie if there is an equal sign */
5998 if (equal < hdr_end && *equal == '=') {
5999 /* look for the beginning of the value */
6000 val_beg = equal + 1;
6001 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6002 val_beg++;
6003
6004 /* find the end of the value, respecting quotes */
6005 next = find_cookie_value_end(val_beg, hdr_end);
6006
6007 /* make val_end point to the first white space or delimitor after the value */
6008 val_end = next;
6009 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6010 val_end--;
6011 } else {
6012 val_beg = val_end = next = equal;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6013 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6014
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6015 /* We have nothing to do with attributes beginning with '$'. However,
6016 * they will automatically be removed if a header before them is removed,
6017 * since they're supposed to be linked together.
6018 */
6019 if (*att_beg == '$')
6020 continue;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6021
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6022 /* Ignore cookies with no equal sign */
6023 if (equal == next) {
6024 /* This is not our cookie, so we must preserve it. But if we already
6025 * scheduled another cookie for removal, we cannot remove the
6026 * complete header, but we can remove the previous block itself.
6027 */
6028 preserve_hdr = 1;
6029 if (del_from != NULL) {
6030 int delta = del_hdr_value(req, &del_from, prev);
6031 val_end += delta;
6032 next += delta;
6033 hdr_end += delta;
6034 hdr_next += delta;
6035 cur_hdr->len += delta;
6036 http_msg_move_end(&txn->req, delta);
6037 prev = del_from;
6038 del_from = NULL;
6039 }
6040 continue;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]6041 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6042
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6043 /* if there are spaces around the equal sign, we need to
6044 * strip them otherwise we'll get trouble for cookie captures,
6045 * or even for rewrites. Since this happens extremely rarely,
6046 * it does not hurt performance.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6047 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6048 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6049 int stripped_before = 0;
6050 int stripped_after = 0;
6051
6052 if (att_end != equal) {
6053 stripped_before = buffer_replace2(req, att_end, equal, NULL, 0);
6054 equal += stripped_before;
6055 val_beg += stripped_before;
6056 }
6057
6058 if (val_beg > equal + 1) {
6059 stripped_after = buffer_replace2(req, equal + 1, val_beg, NULL, 0);
6060 val_beg += stripped_after;
6061 stripped_before += stripped_after;
6062 }
6063
6064 val_end += stripped_before;
6065 next += stripped_before;
6066 hdr_end += stripped_before;
6067 hdr_next += stripped_before;
6068 cur_hdr->len += stripped_before;
6069 http_msg_move_end(&txn->req, stripped_before);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6070 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6071 /* now everything is as on the diagram above */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6072
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6073 /* First, let's see if we want to capture this cookie. We check
6074 * that we don't already have a client side cookie, because we
6075 * can only capture one. Also as an optimisation, we ignore
6076 * cookies shorter than the declared name.
6077 */
6078 if (t->fe->capture_name != NULL && txn->cli_cookie == NULL &&
6079 (val_end - att_beg >= t->fe->capture_namelen) &&
6080 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6081 int log_len = val_end - att_beg;
6082
6083 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
6084 Alert("HTTP logging : out of memory.\n");
6085 } else {
6086 if (log_len > t->fe->capture_len)
6087 log_len = t->fe->capture_len;
6088 memcpy(txn->cli_cookie, att_beg, log_len);
6089 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6090 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6091 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6092
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6093 /* Persistence cookies in passive, rewrite or insert mode have the
6094 * following form :
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6095 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6096 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6097 *
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6098 * For cookies in prefix mode, the form is :
6099 *
6100 * Cookie: NAME=SRV~VALUE
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6101 */
6102 if ((att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6103 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
6104 struct server *srv = t->be->srv;
6105 char *delim;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6106
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6107 /* if we're in cookie prefix mode, we'll search the delimitor so that we
6108 * have the server ID between val_beg and delim, and the original cookie between
6109 * delim+1 and val_end. Otherwise, delim==val_end :
6110 *
6111 * Cookie: NAME=SRV; # in all but prefix modes
6112 * Cookie: NAME=SRV~OPAQUE ; # in prefix mode
6113 * | || || | |+-> next
6114 * | || || | +--> val_end
6115 * | || || +---------> delim
6116 * | || |+------------> val_beg
6117 * | || +-------------> att_end = equal
6118 * | |+-----------------> att_beg
6119 * | +------------------> prev
6120 * +-------------------------> hdr_beg
6121 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6122
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6123 if (t->be->options & PR_O_COOK_PFX) {
6124 for (delim = val_beg; delim < val_end; delim++)
6125 if (*delim == COOKIE_DELIM)
6126 break;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6127 } else {
6128 char *vbar1;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6129 delim = val_end;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6130 /* Now check if the cookie contains a date field, which would
6131 * appear after a vertical bar ('|') just after the server name
6132 * and before the delimiter.
6133 */
6134 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
6135 if (vbar1) {
6136 /* OK, so left of the bar is the server's cookie and
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6137 * right is the last seen date. It is a base64 encoded
6138 * 30-bit value representing the UNIX date since the
6139 * epoch in 4-second quantities.
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6140 */
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6141 int val;
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6142 delim = vbar1++;
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6143 if (val_end - vbar1 >= 5) {
6144 val = b64tos30(vbar1);
6145 if (val > 0)
6146 txn->cookie_last_date = val << 2;
6147 }
6148 /* look for a second vertical bar */
6149 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
6150 if (vbar1 && (val_end - vbar1 > 5)) {
6151 val = b64tos30(vbar1 + 1);
6152 if (val > 0)
6153 txn->cookie_first_date = val << 2;
6154 }
Willy Tarreaubca99692010-10-06 19:25:55 +0200[diff] [blame]6155 }
6156 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6157
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6158 /* if the cookie has an expiration date and the proxy wants to check
6159 * it, then we do that now. We first check if the cookie is too old,
6160 * then only if it has expired. We detect strict overflow because the
6161 * time resolution here is not great (4 seconds). Cookies with dates
6162 * in the future are ignored if their offset is beyond one day. This
6163 * allows an admin to fix timezone issues without expiring everyone
6164 * and at the same time avoids keeping unwanted side effects for too
6165 * long.
6166 */
6167 if (txn->cookie_first_date && t->be->cookie_maxlife &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6168 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)t->be->cookie_maxlife) ||
6169 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6170 txn->flags &= ~TX_CK_MASK;
6171 txn->flags |= TX_CK_OLD;
6172 delim = val_beg; // let's pretend we have not found the cookie
6173 txn->cookie_first_date = 0;
6174 txn->cookie_last_date = 0;
6175 }
6176 else if (txn->cookie_last_date && t->be->cookie_maxidle &&
Willy Tarreauef4f3912010-10-07 21:00:29 +0200[diff] [blame]6177 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)t->be->cookie_maxidle) ||
6178 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6179 txn->flags &= ~TX_CK_MASK;
6180 txn->flags |= TX_CK_EXPIRED;
6181 delim = val_beg; // let's pretend we have not found the cookie
6182 txn->cookie_first_date = 0;
6183 txn->cookie_last_date = 0;
6184 }
6185
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6186 /* Here, we'll look for the first running server which supports the cookie.
6187 * This allows to share a same cookie between several servers, for example
6188 * to dedicate backup servers to specific servers only.
6189 * However, to prevent clients from sticking to cookie-less backup server
6190 * when they have incidentely learned an empty cookie, we simply ignore
6191 * empty cookies and mark them as invalid.
6192 * The same behaviour is applied when persistence must be ignored.
6193 */
6194 if ((delim == val_beg) || (t->flags & SN_IGNORE_PRST))
6195 srv = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6196
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6197 while (srv) {
6198 if (srv->cookie && (srv->cklen == delim - val_beg) &&
6199 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
6200 if ((srv->state & SRV_RUNNING) ||
6201 (t->be->options & PR_O_PERSIST) ||
6202 (t->flags & SN_FORCE_PRST)) {
6203 /* we found the server and we can use it */
6204 txn->flags &= ~TX_CK_MASK;
6205 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
6206 t->flags |= SN_DIRECT | SN_ASSIGNED;
6207 t->srv = srv;
6208 break;
6209 } else {
6210 /* we found a server, but it's down,
6211 * mark it as such and go on in case
6212 * another one is available.
6213 */
6214 txn->flags &= ~TX_CK_MASK;
6215 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6216 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6217 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6218 srv = srv->next;
6219 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6220
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]6221 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6222 /* no server matched this cookie */
6223 txn->flags &= ~TX_CK_MASK;
6224 txn->flags |= TX_CK_INVALID;
6225 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6226
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6227 /* depending on the cookie mode, we may have to either :
6228 * - delete the complete cookie if we're in insert+indirect mode, so that
6229 * the server never sees it ;
6230 * - remove the server id from the cookie value, and tag the cookie as an
6231 * application cookie so that it does not get accidentely removed later,
6232 * if we're in cookie prefix mode
6233 */
6234 if ((t->be->options & PR_O_COOK_PFX) && (delim != val_end)) {
6235 int delta; /* negative */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6236
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6237 delta = buffer_replace2(req, val_beg, delim + 1, NULL, 0);
6238 val_end += delta;
6239 next += delta;
6240 hdr_end += delta;
6241 hdr_next += delta;
6242 cur_hdr->len += delta;
6243 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6244
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6245 del_from = NULL;
6246 preserve_hdr = 1; /* we want to keep this cookie */
6247 }
6248 else if (del_from == NULL &&
6249 (t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) {
6250 del_from = prev;
6251 }
6252 } else {
6253 /* This is not our cookie, so we must preserve it. But if we already
6254 * scheduled another cookie for removal, we cannot remove the
6255 * complete header, but we can remove the previous block itself.
6256 */
6257 preserve_hdr = 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6258
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6259 if (del_from != NULL) {
6260 int delta = del_hdr_value(req, &del_from, prev);
6261 val_end += delta;
6262 next += delta;
6263 hdr_end += delta;
6264 hdr_next += delta;
6265 cur_hdr->len += delta;
6266 http_msg_move_end(&txn->req, delta);
6267 prev = del_from;
6268 del_from = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6269 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6270 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6271
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6272 /* Look for the appsession cookie unless persistence must be ignored */
6273 if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
6274 int cmp_len, value_len;
6275 char *value_begin;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]6276
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6277 if (t->be->options2 & PR_O2_AS_PFX) {
6278 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6279 value_begin = att_beg + t->be->appsession_name_len;
6280 value_len = val_end - att_beg - t->be->appsession_name_len;
6281 } else {
6282 cmp_len = att_end - att_beg;
6283 value_begin = val_beg;
6284 value_len = val_end - val_beg;
6285 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6286
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6287 /* let's see if the cookie is our appcookie */
6288 if (cmp_len == t->be->appsession_name_len &&
6289 memcmp(att_beg, t->be->appsession_name, cmp_len) == 0) {
6290 manage_client_side_appsession(t, value_begin, value_len);
6291 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6292 }
6293
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6294 /* continue with next cookie on this header line */
6295 att_beg = next;
6296 } /* for each cookie */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6297
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6298 /* There are no more cookies on this line.
6299 * We may still have one (or several) marked for deletion at the
6300 * end of the line. We must do this now in two ways :
6301 * - if some cookies must be preserved, we only delete from the
6302 * mark to the end of line ;
6303 * - if nothing needs to be preserved, simply delete the whole header
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6304 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6305 if (del_from) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6306 int delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6307 if (preserve_hdr) {
6308 delta = del_hdr_value(req, &del_from, hdr_end);
6309 hdr_end = del_from;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6310 cur_hdr->len += delta;
6311 } else {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6312 delta = buffer_replace2(req, hdr_beg, hdr_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6313
6314 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6315 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6316 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6317 cur_hdr->len = 0;
6318 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6319 hdr_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6320 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6321 }
6322
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6323 /* check next header */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6324 old_idx = cur_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6325 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6326}
6327
6328
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6329/* Iterate the same filter through all response headers contained in <rtr>.
6330 * Returns 1 if this filter can be stopped upon return, otherwise 0.
6331 */
6332int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6333{
6334 char term;
6335 char *cur_ptr, *cur_end, *cur_next;
6336 int cur_idx, old_idx, last_hdr;
6337 struct http_txn *txn = &t->txn;
6338 struct hdr_idx_elem *cur_hdr;
6339 int len, delta;
6340
6341 last_hdr = 0;
6342
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6343 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6344 old_idx = 0;
6345
6346 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6347 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6348 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6349 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6350 (exp->action == ACT_ALLOW ||
6351 exp->action == ACT_DENY))
6352 return 0;
6353
6354 cur_idx = txn->hdr_idx.v[old_idx].next;
6355 if (!cur_idx)
6356 break;
6357
6358 cur_hdr = &txn->hdr_idx.v[cur_idx];
6359 cur_ptr = cur_next;
6360 cur_end = cur_ptr + cur_hdr->len;
6361 cur_next = cur_end + cur_hdr->cr + 1;
6362
6363 /* Now we have one header between cur_ptr and cur_end,
6364 * and the next header starts at cur_next.
6365 */
6366
6367 /* The annoying part is that pattern matching needs
6368 * that we modify the contents to null-terminate all
6369 * strings before testing them.
6370 */
6371
6372 term = *cur_end;
6373 *cur_end = '\0';
6374
6375 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6376 switch (exp->action) {
6377 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6378 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6379 last_hdr = 1;
6380 break;
6381
6382 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6383 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6384 last_hdr = 1;
6385 break;
6386
6387 case ACT_REPLACE:
6388 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6389 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6390 /* FIXME: if the user adds a newline in the replacement, the
6391 * index will not be recalculated for now, and the new line
6392 * will not be counted as a new header.
6393 */
6394
6395 cur_end += delta;
6396 cur_next += delta;
6397 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6398 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6399 break;
6400
6401 case ACT_REMOVE:
6402 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
6403 cur_next += delta;
6404
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6405 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6406 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6407 txn->hdr_idx.used--;
6408 cur_hdr->len = 0;
6409 cur_end = NULL; /* null-term has been rewritten */
6410 break;
6411
6412 }
6413 }
6414 if (cur_end)
6415 *cur_end = term; /* restore the string terminator */
6416
6417 /* keep the link from this header to next one in case of later
6418 * removal of next header.
6419 */
6420 old_idx = cur_idx;
6421 }
6422 return 0;
6423}
6424
6425
6426/* Apply the filter to the status line in the response buffer <rtr>.
6427 * Returns 0 if nothing has been done, 1 if the filter has been applied,
6428 * or -1 if a replacement resulted in an invalid status line.
6429 */
6430int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6431{
6432 char term;
6433 char *cur_ptr, *cur_end;
6434 int done;
6435 struct http_txn *txn = &t->txn;
6436 int len, delta;
6437
6438
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6439 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6440 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6441 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6442 (exp->action == ACT_ALLOW ||
6443 exp->action == ACT_DENY))
6444 return 0;
6445 else if (exp->action == ACT_REMOVE)
6446 return 0;
6447
6448 done = 0;
6449
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6450 cur_ptr = txn->rsp.sol;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]6451 cur_end = cur_ptr + txn->rsp.sl.st.l;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6452
6453 /* Now we have the status line between cur_ptr and cur_end */
6454
6455 /* The annoying part is that pattern matching needs
6456 * that we modify the contents to null-terminate all
6457 * strings before testing them.
6458 */
6459
6460 term = *cur_end;
6461 *cur_end = '\0';
6462
6463 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6464 switch (exp->action) {
6465 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6466 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6467 done = 1;
6468 break;
6469
6470 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6471 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6472 done = 1;
6473 break;
6474
6475 case ACT_REPLACE:
6476 *cur_end = term; /* restore the string terminator */
6477 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6478 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6479 /* FIXME: if the user adds a newline in the replacement, the
6480 * index will not be recalculated for now, and the new line
6481 * will not be counted as a new header.
6482 */
6483
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6484 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6485 cur_end += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6486 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]6487 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6488 cur_ptr, cur_end + 1,
6489 NULL, NULL);
6490 if (unlikely(!cur_end))
6491 return -1;
6492
6493 /* we have a full respnse and we know that we have either a CR
6494 * or an LF at <ptr>.
6495 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6496 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]6497 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]6498 /* there is no point trying this regex on headers */
6499 return 1;
6500 }
6501 }
6502 *cur_end = term; /* restore the string terminator */
6503 return done;
6504}
6505
6506
6507
6508/*
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6509 * 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]6510 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
6511 * unparsable response.
6512 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6513int apply_filters_to_response(struct session *s, struct buffer *rtr, struct proxy *px)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6514{
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6515 struct http_txn *txn = &s->txn;
6516 struct hdr_exp *exp;
6517
6518 for (exp = px->rsp_exp; exp; exp = exp->next) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6519 int ret;
6520
6521 /*
6522 * The interleaving of transformations and verdicts
6523 * makes it difficult to decide to continue or stop
6524 * the evaluation.
6525 */
6526
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6527 if (txn->flags & TX_SVDENY)
6528 break;
6529
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6530 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6531 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
6532 exp->action == ACT_PASS)) {
6533 exp = exp->next;
6534 continue;
6535 }
6536
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6537 /* if this filter had a condition, evaluate it now and skip to
6538 * next filter if the condition does not match.
6539 */
6540 if (exp->cond) {
6541 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_RTR);
6542 ret = acl_pass(ret);
6543 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
6544 ret = !ret;
6545 if (!ret)
6546 continue;
6547 }
6548
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6549 /* Apply the filter to the status line. */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6550 ret = apply_filter_to_sts_line(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6551 if (unlikely(ret < 0))
6552 return -1;
6553
6554 if (likely(ret == 0)) {
6555 /* The filter did not match the response, it can be
6556 * iterated through all headers.
6557 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6558 apply_filter_to_resp_headers(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6559 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6560 }
6561 return 0;
6562}
6563
6564
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6565/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6566 * Manage server-side cookies. It can impact performance by about 2% so it is
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6567 * desirable to call it only when needed. This function is also used when we
6568 * just need to know if there is a cookie (eg: for check-cache).
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6569 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6570void manage_server_side_cookies(struct session *t, struct buffer *res)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6571{
6572 struct http_txn *txn = &t->txn;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6573 int is_cookie2;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6574 int cur_idx, old_idx, delta;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6575 char *hdr_beg, *hdr_end, *hdr_next;
6576 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6577
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6578 /* Iterate through the headers.
6579 * we start with the start line.
6580 */
6581 old_idx = 0;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6582 hdr_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6583
6584 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
6585 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6586 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6587
6588 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6589 hdr_beg = hdr_next;
6590 hdr_end = hdr_beg + cur_hdr->len;
6591 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6592
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6593 /* We have one full header between hdr_beg and hdr_end, and the
6594 * next header starts at hdr_next. We're only interested in
6595 * "Set-Cookie" and "Set-Cookie2" headers.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6596 */
6597
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6598 is_cookie2 = 0;
6599 prev = hdr_beg + 10;
6600 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie", 10);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6601 if (!val) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6602 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie2", 11);
6603 if (!val) {
6604 old_idx = cur_idx;
6605 continue;
6606 }
6607 is_cookie2 = 1;
6608 prev = hdr_beg + 11;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6609 }
6610
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6611 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
6612 * <prev> points to the colon.
6613 */
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6614 txn->flags |= TX_SCK_PRESENT;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6615
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6616 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
6617 * check-cache is enabled) and we are not interested in checking
6618 * them. Warning, the cookie capture is declared in the frontend.
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6619 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6620 if (t->be->cookie_name == NULL &&
6621 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6622 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6623 return;
6624
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6625 /* OK so now we know we have to process this response cookie.
6626 * The format of the Set-Cookie header is slightly different
6627 * from the format of the Cookie header in that it does not
6628 * support the comma as a cookie delimiter (thus the header
6629 * cannot be folded) because the Expires attribute described in
6630 * the original Netscape's spec may contain an unquoted date
6631 * with a comma inside. We have to live with this because
6632 * many browsers don't support Max-Age and some browsers don't
6633 * support quoted strings. However the Set-Cookie2 header is
6634 * clean.
6635 *
6636 * We have to keep multiple pointers in order to support cookie
6637 * removal at the beginning, middle or end of header without
6638 * corrupting the header (in case of set-cookie2). A special
6639 * pointer, <scav> points to the beginning of the set-cookie-av
6640 * fields after the first semi-colon. The <next> pointer points
6641 * either to the end of line (set-cookie) or next unquoted comma
6642 * (set-cookie2). All of these headers are valid :
6643 *
6644 * Set-Cookie: NAME1 = VALUE 1 ; Secure; Path="/"\r\n
6645 * Set-Cookie:NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6646 * Set-Cookie: NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6647 * Set-Cookie2: NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard\r\n
6648 * | | | | | | | | | |
6649 * | | | | | | | | +-> next hdr_end <--+
6650 * | | | | | | | +------------> scav
6651 * | | | | | | +--------------> val_end
6652 * | | | | | +--------------------> val_beg
6653 * | | | | +----------------------> equal
6654 * | | | +------------------------> att_end
6655 * | | +----------------------------> att_beg
6656 * | +------------------------------> prev
6657 * +-----------------------------------------> hdr_beg
6658 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6659
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6660 for (; prev < hdr_end; prev = next) {
6661 /* Iterate through all cookies on this line */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6662
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6663 /* find att_beg */
6664 att_beg = prev + 1;
6665 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6666 att_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6667
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6668 /* find att_end : this is the first character after the last non
6669 * space before the equal. It may be equal to hdr_end.
6670 */
6671 equal = att_end = att_beg;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6672
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6673 while (equal < hdr_end) {
6674 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
6675 break;
6676 if (http_is_spht[(unsigned char)*equal++])
6677 continue;
6678 att_end = equal;
6679 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6680
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6681 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6682 * is between <att_beg> and <equal>, both may be identical.
6683 */
6684
6685 /* look for end of cookie if there is an equal sign */
6686 if (equal < hdr_end && *equal == '=') {
6687 /* look for the beginning of the value */
6688 val_beg = equal + 1;
6689 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6690 val_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6691
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6692 /* find the end of the value, respecting quotes */
6693 next = find_cookie_value_end(val_beg, hdr_end);
6694
6695 /* make val_end point to the first white space or delimitor after the value */
6696 val_end = next;
6697 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6698 val_end--;
6699 } else {
6700 /* <equal> points to next comma, semi-colon or EOL */
6701 val_beg = val_end = next = equal;
6702 }
6703
6704 if (next < hdr_end) {
6705 /* Set-Cookie2 supports multiple cookies, and <next> points to
6706 * a colon or semi-colon before the end. So skip all attr-value
6707 * pairs and look for the next comma. For Set-Cookie, since
6708 * commas are permitted in values, skip to the end.
6709 */
6710 if (is_cookie2)
6711 next = find_hdr_value_end(next, hdr_end);
6712 else
6713 next = hdr_end;
6714 }
6715
6716 /* Now everything is as on the diagram above */
6717
6718 /* Ignore cookies with no equal sign */
6719 if (equal == val_end)
6720 continue;
6721
6722 /* If there are spaces around the equal sign, we need to
6723 * strip them otherwise we'll get trouble for cookie captures,
6724 * or even for rewrites. Since this happens extremely rarely,
6725 * it does not hurt performance.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6726 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6727 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6728 int stripped_before = 0;
6729 int stripped_after = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6730
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6731 if (att_end != equal) {
6732 stripped_before = buffer_replace2(res, att_end, equal, NULL, 0);
6733 equal += stripped_before;
6734 val_beg += stripped_before;
6735 }
6736
6737 if (val_beg > equal + 1) {
6738 stripped_after = buffer_replace2(res, equal + 1, val_beg, NULL, 0);
6739 val_beg += stripped_after;
6740 stripped_before += stripped_after;
6741 }
6742
6743 val_end += stripped_before;
6744 next += stripped_before;
6745 hdr_end += stripped_before;
6746 hdr_next += stripped_before;
6747 cur_hdr->len += stripped_before;
6748 http_msg_move_end(&txn->req, stripped_before);
6749 }
6750
6751 /* First, let's see if we want to capture this cookie. We check
6752 * that we don't already have a server side cookie, because we
6753 * can only capture one. Also as an optimisation, we ignore
6754 * cookies shorter than the declared name.
6755 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6756 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6757 txn->srv_cookie == NULL &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6758 (val_end - att_beg >= t->fe->capture_namelen) &&
6759 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6760 int log_len = val_end - att_beg;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]6761 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6762 Alert("HTTP logging : out of memory.\n");
6763 }
6764
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6765 if (log_len > t->fe->capture_len)
6766 log_len = t->fe->capture_len;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6767 memcpy(txn->srv_cookie, att_beg, log_len);
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6768 txn->srv_cookie[log_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6769 }
6770
6771 /* now check if we need to process it for persistence */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6772 if (!(t->flags & SN_IGNORE_PRST) &&
6773 (att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6774 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6775 /* assume passive cookie by default */
6776 txn->flags &= ~TX_SCK_MASK;
6777 txn->flags |= TX_SCK_FOUND;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6778
6779 /* If the cookie is in insert mode on a known server, we'll delete
6780 * this occurrence because we'll insert another one later.
6781 * 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]6782 * a direct access.
6783 */
Willy Tarreauba4c5be2010-10-23 12:46:42 +0200[diff] [blame]6784 if (t->be->options2 & PR_O2_COOK_PSV) {
6785 /* The "preserve" flag was set, we don't want to touch the
6786 * server's cookie.
6787 */
6788 }
6789 else if (((t->srv) && (t->be->options & PR_O_COOK_INS)) ||
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6790 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6791 /* this cookie must be deleted */
6792 if (*prev == ':' && next == hdr_end) {
6793 /* whole header */
6794 delta = buffer_replace2(res, hdr_beg, hdr_next, NULL, 0);
6795 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6796 txn->hdr_idx.used--;
6797 cur_hdr->len = 0;
6798 hdr_next += delta;
6799 http_msg_move_end(&txn->rsp, delta);
6800 /* note: while both invalid now, <next> and <hdr_end>
6801 * are still equal, so the for() will stop as expected.
6802 */
6803 } else {
6804 /* just remove the value */
6805 int delta = del_hdr_value(res, &prev, next);
6806 next = prev;
6807 hdr_end += delta;
6808 hdr_next += delta;
6809 cur_hdr->len += delta;
6810 http_msg_move_end(&txn->rsp, delta);
6811 }
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6812 txn->flags &= ~TX_SCK_MASK;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6813 txn->flags |= TX_SCK_DELETED;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6814 /* and go on with next cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6815 }
6816 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6817 (t->be->options & PR_O_COOK_RW)) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6818 /* replace bytes val_beg->val_end with the cookie name associated
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6819 * with this server since we know it.
6820 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6821 delta = buffer_replace2(res, val_beg, val_end, t->srv->cookie, t->srv->cklen);
6822 next += delta;
6823 hdr_end += delta;
6824 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6825 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6826 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6827
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6828 txn->flags &= ~TX_SCK_MASK;
6829 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6830 }
6831 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6832 (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6833 /* insert the cookie name associated with this server
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6834 * before existing cookie, and insert a delimiter between them..
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6835 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6836 delta = buffer_replace2(res, val_beg, val_beg, t->srv->cookie, t->srv->cklen + 1);
6837 next += delta;
6838 hdr_end += delta;
6839 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6840 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6841 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6842
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6843 val_beg[t->srv->cklen] = COOKIE_DELIM;
Willy Tarreauf1348312010-10-07 15:54:11 +0200[diff] [blame]6844 txn->flags &= ~TX_SCK_MASK;
6845 txn->flags |= TX_SCK_REPLACED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6846 }
6847 }
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]6848 /* next, let's see if the cookie is our appcookie, unless persistence must be ignored */
6849 else if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6850 int cmp_len, value_len;
6851 char *value_begin;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6852
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6853 if (t->be->options2 & PR_O2_AS_PFX) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6854 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6855 value_begin = att_beg + t->be->appsession_name_len;
6856 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]6857 } else {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6858 cmp_len = att_end - att_beg;
6859 value_begin = val_beg;
6860 value_len = MIN(t->be->appsession_len, val_end - val_beg);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6861 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6862
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]6863 if ((cmp_len == t->be->appsession_name_len) &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6864 (memcmp(att_beg, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
6865 /* free a possibly previously allocated memory */
6866 pool_free2(apools.sessid, txn->sessid);
6867
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6868 /* Store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6869 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6870 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6871 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
6872 return;
6873 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6874 memcpy(txn->sessid, value_begin, value_len);
6875 txn->sessid[value_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6876 }
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6877 }
6878 /* that's done for this cookie, check the next one on the same
6879 * line when next != hdr_end (only if is_cookie2).
6880 */
6881 }
6882 /* check next header */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6883 old_idx = cur_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6884 }
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6885
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6886 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6887 appsess *asession = NULL;
6888 /* only do insert, if lookup fails */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6889 asession = appsession_hash_lookup(&(t->be->htbl_proxy), txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6890 if (asession == NULL) {
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]6891 size_t server_id_len;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6892 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
6893 Alert("Not enough Memory process_srv():asession:calloc().\n");
6894 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
6895 return;
6896 }
6897 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
6898 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6899 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]6900 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6901 return;
6902 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6903 memcpy(asession->sessid, txn->sessid, t->be->appsession_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6904 asession->sessid[t->be->appsession_len] = 0;
6905
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]6906 server_id_len = strlen(t->srv->id) + 1;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6907 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
6908 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6909 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]6910 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6911 return;
6912 }
6913 asession->serverid[0] = '\0';
6914 memcpy(asession->serverid, t->srv->id, server_id_len);
6915
6916 asession->request_count = 0;
6917 appsession_hash_insert(&(t->be->htbl_proxy), asession);
6918 }
6919
6920 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
6921 asession->request_count++;
6922 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6923}
6924
6925
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6926/*
6927 * Check if response is cacheable or not. Updates t->flags.
6928 */
6929void check_response_for_cacheability(struct session *t, struct buffer *rtr)
6930{
6931 struct http_txn *txn = &t->txn;
6932 char *p1, *p2;
6933
6934 char *cur_ptr, *cur_end, *cur_next;
6935 int cur_idx;
6936
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]6937 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6938 return;
6939
6940 /* Iterate through the headers.
6941 * we start with the start line.
6942 */
6943 cur_idx = 0;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6944 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6945
6946 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
6947 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6948 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6949
6950 cur_hdr = &txn->hdr_idx.v[cur_idx];
6951 cur_ptr = cur_next;
6952 cur_end = cur_ptr + cur_hdr->len;
6953 cur_next = cur_end + cur_hdr->cr + 1;
6954
6955 /* We have one full header between cur_ptr and cur_end, and the
6956 * next header starts at cur_next. We're only interested in
6957 * "Cookie:" headers.
6958 */
6959
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6960 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
6961 if (val) {
6962 if ((cur_end - (cur_ptr + val) >= 8) &&
6963 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
6964 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
6965 return;
6966 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6967 }
6968
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6969 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
6970 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6971 continue;
6972
6973 /* OK, right now we know we have a cache-control header at cur_ptr */
6974
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6975 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6976
6977 if (p1 >= cur_end) /* no more info */
6978 continue;
6979
6980 /* p1 is at the beginning of the value */
6981 p2 = p1;
6982
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]6983 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6984 p2++;
6985
6986 /* we have a complete value between p1 and p2 */
6987 if (p2 < cur_end && *p2 == '=') {
6988 /* we have something of the form no-cache="set-cookie" */
6989 if ((cur_end - p1 >= 21) &&
6990 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
6991 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6992 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6993 continue;
6994 }
6995
6996 /* OK, so we know that either p2 points to the end of string or to a comma */
6997 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
6998 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
6999 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
7000 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7001 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7002 return;
7003 }
7004
7005 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]7006 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]7007 continue;
7008 }
7009 }
7010}
7011
7012
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7013/*
7014 * Try to retrieve a known appsession in the URI, then the associated server.
7015 * If the server is found, it's assigned to the session.
7016 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7017void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7018{
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7019 char *end_params, *first_param, *cur_param, *next_param;
7020 char separator;
7021 int value_len;
7022
7023 int mode = t->be->options2 & PR_O2_AS_M_ANY;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7024
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]7025 if (t->be->appsession_name == NULL ||
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]7026 (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]7027 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7028 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7029
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7030 first_param = NULL;
7031 switch (mode) {
7032 case PR_O2_AS_M_PP:
7033 first_param = memchr(begin, ';', len);
7034 break;
7035 case PR_O2_AS_M_QS:
7036 first_param = memchr(begin, '?', len);
7037 break;
7038 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7039
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7040 if (first_param == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7041 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7042 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7043
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7044 switch (mode) {
7045 case PR_O2_AS_M_PP:
7046 if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) {
7047 end_params = (char *) begin + len;
7048 }
7049 separator = ';';
7050 break;
7051 case PR_O2_AS_M_QS:
7052 end_params = (char *) begin + len;
7053 separator = '&';
7054 break;
7055 default:
7056 /* unknown mode, shouldn't happen */
7057 return;
7058 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7059
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]7060 cur_param = next_param = end_params;
7061 while (cur_param > first_param) {
7062 cur_param--;
7063 if ((cur_param[0] == separator) || (cur_param == first_param)) {
7064 /* let's see if this is the appsession parameter */
7065 if ((cur_param + t->be->appsession_name_len + 1 < next_param) &&
7066 ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') &&
7067 (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
7068 /* Cool... it's the right one */
7069 cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2);
7070 value_len = MIN(t->be->appsession_len, next_param - cur_param);
7071 if (value_len > 0) {
7072 manage_client_side_appsession(t, cur_param, value_len);
7073 }
7074 break;
7075 }
7076 next_param = cur_param;
7077 }
7078 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7079#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]7080 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]7081 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7082#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7083}
7084
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7085/*
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7086 * 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]7087 * for the current backend.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7088 *
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7089 * It is assumed that the request is either a HEAD, GET, or POST and that the
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7090 * t->be->uri_auth field is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7091 *
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7092 * Returns 1 if stats should be provided, otherwise 0.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7093 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7094int stats_check_uri(struct session *t, struct proxy *backend)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7095{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]7096 struct http_txn *txn = &t->txn;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7097 struct uri_auth *uri_auth = backend->uri_auth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7098 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7099
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]7100 if (!uri_auth)
7101 return 0;
7102
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7103 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]7104 return 0;
7105
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7106 memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats));
7107
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7108 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]7109 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7110 return 0;
7111
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7112 h = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]7113
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]7114 /* the URI is in h */
7115 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7116 return 0;
7117
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7118 h += uri_auth->uri_len;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7119 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]7120 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7121 t->data_ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7122 break;
7123 }
7124 h++;
7125 }
7126
7127 if (uri_auth->refresh) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7128 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7129 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]7130 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7131 t->data_ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]7132 break;
7133 }
7134 h++;
7135 }
7136 }
7137
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7138 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7139 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]7140 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7141 t->data_ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]7142 break;
7143 }
7144 h++;
7145 }
7146
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7147 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
7148 while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 8) {
7149 if (memcmp(h, ";st=", 4) == 0) {
7150 h += 4;
7151
7152 if (memcmp(h, STAT_STATUS_DONE, 4) == 0)
7153 t->data_ctx.stats.st_code = STAT_STATUS_DONE;
7154 else if (memcmp(h, STAT_STATUS_NONE, 4) == 0)
7155 t->data_ctx.stats.st_code = STAT_STATUS_NONE;
7156 else if (memcmp(h, STAT_STATUS_EXCD, 4) == 0)
7157 t->data_ctx.stats.st_code = STAT_STATUS_EXCD;
Cyril Bonté474be412010-10-12 00:14:36 +0200[diff] [blame]7158 else if (memcmp(h, STAT_STATUS_DENY, 4) == 0)
7159 t->data_ctx.stats.st_code = STAT_STATUS_DENY;
Cyril Bonté70be45d2010-10-12 00:14:35 +0200[diff] [blame]7160 else
7161 t->data_ctx.stats.st_code = STAT_STATUS_UNKN;
7162 break;
7163 }
7164 h++;
7165 }
7166
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]7167 t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
7168
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7169 return 1;
7170}
7171
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7172/*
7173 * Capture a bad request or response and archive it in the proxy's structure.
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7174 * WARNING: it's unlikely that we've reached HTTP_MSG_BODY here so we must not
7175 * assume that msg->sol = buf->data + msg->som.
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7176 */
7177void http_capture_bad_message(struct error_snapshot *es, struct session *s,
7178 struct buffer *buf, struct http_msg *msg,
7179 struct proxy *other_end)
7180{
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]7181 es->len = buf->r - (buf->data + msg->som);
7182 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7183 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]7184 es->pos = msg->err_pos - msg->som;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7185 else
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]7186 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]7187 es->when = date; // user-visible date
7188 es->sid = s->uniq_id;
7189 es->srv = s->srv;
7190 es->oe = other_end;
7191 es->src = s->cli_addr;
7192}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]7193
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]7194/* return the IP address pointed to by occurrence <occ> of header <hname> in
7195 * HTTP message <msg> indexed in <idx>. If <occ> is strictly positive, the
7196 * occurrence number corresponding to this value is returned. If <occ> is
7197 * strictly negative, the occurrence number before the end corresponding to
7198 * this value is returned. If <occ> is null, any value is returned, so it is
7199 * not recommended to use it that way. Negative occurrences are limited to
7200 * a small value because it is required to keep them in memory while scanning.
7201 * IP address 0.0.0.0 is returned if no match is found.
7202 */
7203unsigned int get_ip_from_hdr2(struct http_msg *msg, const char *hname, int hlen, struct hdr_idx *idx, int occ)
7204{
7205 struct hdr_ctx ctx;
7206 unsigned int hdr_hist[MAX_HDR_HISTORY];
7207 unsigned int hist_ptr;
7208 int found = 0;
7209
7210 ctx.idx = 0;
7211 if (occ >= 0) {
7212 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
7213 occ--;
7214 if (occ <= 0) {
7215 found = 1;
7216 break;
7217 }
7218 }
7219 if (!found)
7220 return 0;
7221 return inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
7222 }
7223
7224 /* negative occurrence, we scan all the list then walk back */
7225 if (-occ > MAX_HDR_HISTORY)
7226 return 0;
7227
7228 hist_ptr = 0;
7229 hdr_hist[hist_ptr] = 0;
7230 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
7231 hdr_hist[hist_ptr++] = inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
7232 if (hist_ptr >= MAX_HDR_HISTORY)
7233 hist_ptr = 0;
7234 found++;
7235 }
7236 if (-occ > found)
7237 return 0;
7238 /* OK now we have the last occurrence in [hist_ptr-1], and we need to
7239 * find occurrence -occ, so we have to check [hist_ptr+occ].
7240 */
7241 hist_ptr += occ;
7242 if (hist_ptr >= MAX_HDR_HISTORY)
7243 hist_ptr -= MAX_HDR_HISTORY;
7244 return hdr_hist[hist_ptr];
7245}
7246
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]7247/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7248 * Print a debug line with a header
7249 */
7250void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
7251{
7252 int len, max;
7253 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]7254 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7255 max = end - start;
7256 UBOUND(max, sizeof(trash) - len - 1);
7257 len += strlcpy2(trash + len, start, max + 1);
7258 trash[len++] = '\n';
7259 write(1, trash, len);
7260}
7261
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7262/*
7263 * Initialize a new HTTP transaction for session <s>. It is assumed that all
7264 * the required fields are properly allocated and that we only need to (re)init
7265 * them. This should be used before processing any new request.
7266 */
7267void http_init_txn(struct session *s)
7268{
7269 struct http_txn *txn = &s->txn;
7270 struct proxy *fe = s->fe;
7271
7272 txn->flags = 0;
7273 txn->status = -1;
7274
Willy Tarreauf64d1412010-10-07 20:06:11 +0200[diff] [blame]7275 txn->cookie_first_date = 0;
7276 txn->cookie_last_date = 0;
7277
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7278 txn->req.sol = txn->req.eol = NULL;
7279 txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
7280 txn->rsp.sol = txn->rsp.eol = NULL;
7281 txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */
7282 txn->req.hdr_content_len = 0LL;
7283 txn->rsp.hdr_content_len = 0LL;
7284 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
7285 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]7286
7287 txn->auth.method = HTTP_AUTH_UNKNOWN;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7288
7289 txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
7290 if (fe->options2 & PR_O2_REQBUG_OK)
7291 txn->req.err_pos = -1; /* let buggy requests pass */
7292
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7293 if (txn->req.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7294 memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *));
7295
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7296 if (txn->rsp.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7297 memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *));
7298
7299 if (txn->hdr_idx.v)
7300 hdr_idx_init(&txn->hdr_idx);
7301}
7302
7303/* to be used at the end of a transaction */
7304void http_end_txn(struct session *s)
7305{
7306 struct http_txn *txn = &s->txn;
7307
7308 /* these ones will have been dynamically allocated */
7309 pool_free2(pool2_requri, txn->uri);
7310 pool_free2(pool2_capture, txn->cli_cookie);
7311 pool_free2(pool2_capture, txn->srv_cookie);
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7312 pool_free2(apools.sessid, txn->sessid);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7313
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7314 txn->sessid = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7315 txn->uri = NULL;
7316 txn->srv_cookie = NULL;
7317 txn->cli_cookie = NULL;
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7318
7319 if (txn->req.cap) {
7320 struct cap_hdr *h;
7321 for (h = s->fe->req_cap; h; h = h->next)
7322 pool_free2(h->pool, txn->req.cap[h->index]);
7323 memset(txn->req.cap, 0, s->fe->nb_req_cap * sizeof(void *));
7324 }
7325
7326 if (txn->rsp.cap) {
7327 struct cap_hdr *h;
7328 for (h = s->fe->rsp_cap; h; h = h->next)
7329 pool_free2(h->pool, txn->rsp.cap[h->index]);
7330 memset(txn->rsp.cap, 0, s->fe->nb_rsp_cap * sizeof(void *));
7331 }
7332
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7333}
7334
7335/* to be used at the end of a transaction to prepare a new one */
7336void http_reset_txn(struct session *s)
7337{
7338 http_end_txn(s);
7339 http_init_txn(s);
7340
7341 s->be = s->fe;
7342 s->req->analysers = s->listener->analysers;
7343 s->logs.logwait = s->fe->to_log;
7344 s->srv = s->prev_srv = s->srv_conn = NULL;
Emeric Brunb982a3d2010-01-04 15:45:53 +0100[diff] [blame]7345 /* re-init store persistence */
7346 s->store_count = 0;
7347
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7348 s->pend_pos = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7349
7350 s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
7351
Willy Tarreau739cfba2010-01-25 23:11:14 +0100[diff] [blame]7352 /* We must trim any excess data from the response buffer, because we
7353 * may have blocked an invalid response from a server that we don't
7354 * want to accidentely forward once we disable the analysers, nor do
7355 * we want those data to come along with next response. A typical
7356 * example of such data would be from a buggy server responding to
7357 * a HEAD with some data, or sending more than the advertised
7358 * content-length.
7359 */
7360 if (unlikely(s->rep->l > s->rep->send_max)) {
7361 s->rep->l = s->rep->send_max;
7362 s->rep->r = s->rep->w + s->rep->l;
7363 if (s->rep->r >= s->rep->data + s->rep->size)
7364 s->rep->r -= s->rep->size;
7365 }
7366
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7367 s->req->rto = s->fe->timeout.client;
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7368 s->req->wto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7369
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7370 s->rep->rto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7371 s->rep->wto = s->fe->timeout.client;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7372
7373 s->req->rex = TICK_ETERNITY;
7374 s->req->wex = TICK_ETERNITY;
7375 s->req->analyse_exp = TICK_ETERNITY;
7376 s->rep->rex = TICK_ETERNITY;
7377 s->rep->wex = TICK_ETERNITY;
7378 s->rep->analyse_exp = TICK_ETERNITY;
7379}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7380
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7381/************************************************************************/
7382/* The code below is dedicated to ACL parsing and matching */
7383/************************************************************************/
7384
7385
7386
7387
7388/* 1. Check on METHOD
7389 * We use the pre-parsed method if it is known, and store its number as an
7390 * integer. If it is unknown, we use the pointer and the length.
7391 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7392static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7393{
7394 int len, meth;
7395
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7396 len = strlen(*text);
7397 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7398
7399 pattern->val.i = meth;
7400 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7401 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7402 if (!pattern->ptr.str)
7403 return 0;
7404 pattern->len = len;
7405 }
7406 return 1;
7407}
7408
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7409static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7410acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
7411 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7412{
7413 int meth;
7414 struct http_txn *txn = l7;
7415
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7416 if (!txn)
7417 return 0;
7418
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7419 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7420 return 0;
7421
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7422 meth = txn->meth;
7423 test->i = meth;
7424 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7425 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7426 /* ensure the indexes are not affected */
7427 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7428 test->len = txn->req.sl.rq.m_l;
7429 test->ptr = txn->req.sol;
7430 }
7431 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7432 return 1;
7433}
7434
7435static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
7436{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7437 int icase;
7438
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7439 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7440 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7441
7442 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7443 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7444
7445 /* Other method, we must compare the strings */
7446 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7447 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7448
7449 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
7450 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
7451 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7452 return ACL_PAT_FAIL;
7453 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7454}
7455
7456/* 2. Check on Request/Status Version
7457 * We simply compare strings here.
7458 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7459static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7460{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7461 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7462 if (!pattern->ptr.str)
7463 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7464 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7465 return 1;
7466}
7467
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7468static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7469acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
7470 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7471{
7472 struct http_txn *txn = l7;
7473 char *ptr;
7474 int len;
7475
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7476 if (!txn)
7477 return 0;
7478
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7479 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7480 return 0;
7481
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7482 len = txn->req.sl.rq.v_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7483 ptr = txn->req.sol + txn->req.sl.rq.v;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7484
7485 while ((len-- > 0) && (*ptr++ != '/'));
7486 if (len <= 0)
7487 return 0;
7488
7489 test->ptr = ptr;
7490 test->len = len;
7491
7492 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7493 return 1;
7494}
7495
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7496static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7497acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
7498 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7499{
7500 struct http_txn *txn = l7;
7501 char *ptr;
7502 int len;
7503
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7504 if (!txn)
7505 return 0;
7506
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7507 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7508 return 0;
7509
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7510 len = txn->rsp.sl.st.v_l;
7511 ptr = txn->rsp.sol;
7512
7513 while ((len-- > 0) && (*ptr++ != '/'));
7514 if (len <= 0)
7515 return 0;
7516
7517 test->ptr = ptr;
7518 test->len = len;
7519
7520 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7521 return 1;
7522}
7523
7524/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7525static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7526acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
7527 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7528{
7529 struct http_txn *txn = l7;
7530 char *ptr;
7531 int len;
7532
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7533 if (!txn)
7534 return 0;
7535
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7536 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7537 return 0;
7538
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7539 len = txn->rsp.sl.st.c_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7540 ptr = txn->rsp.sol + txn->rsp.sl.st.c;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7541
7542 test->i = __strl2ui(ptr, len);
7543 test->flags = ACL_TEST_F_VOL_1ST;
7544 return 1;
7545}
7546
7547/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7548static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7549acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
7550 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7551{
7552 struct http_txn *txn = l7;
7553
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7554 if (!txn)
7555 return 0;
7556
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7557 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7558 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7559
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7560 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7561 /* ensure the indexes are not affected */
7562 return 0;
7563
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7564 test->len = txn->req.sl.rq.u_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7565 test->ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7566
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]7567 /* we do not need to set READ_ONLY because the data is in a buffer */
7568 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7569 return 1;
7570}
7571
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7572static int
7573acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7574 struct acl_expr *expr, struct acl_test *test)
7575{
7576 struct http_txn *txn = l7;
7577
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7578 if (!txn)
7579 return 0;
7580
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7581 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7582 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7583
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7584 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7585 /* ensure the indexes are not affected */
7586 return 0;
7587
7588 /* Parse HTTP request */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7589 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7590 test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr;
7591 test->i = AF_INET;
7592
7593 /*
7594 * If we are parsing url in frontend space, we prepare backend stage
7595 * to not parse again the same url ! optimization lazyness...
7596 */
7597 if (px->options & PR_O_HTTP_PROXY)
7598 l4->flags |= SN_ADDR_SET;
7599
7600 test->flags = ACL_TEST_F_READ_ONLY;
7601 return 1;
7602}
7603
7604static int
7605acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
7606 struct acl_expr *expr, struct acl_test *test)
7607{
7608 struct http_txn *txn = l7;
7609
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7610 if (!txn)
7611 return 0;
7612
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7613 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7614 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7615
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7616 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7617 /* ensure the indexes are not affected */
7618 return 0;
7619
7620 /* Same optimization as url_ip */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7621 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7622 test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port);
7623
7624 if (px->options & PR_O_HTTP_PROXY)
7625 l4->flags |= SN_ADDR_SET;
7626
7627 test->flags = ACL_TEST_F_READ_ONLY;
7628 return 1;
7629}
7630
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7631/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
7632 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
7633 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7634static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7635acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7636 struct acl_expr *expr, struct acl_test *test)
7637{
7638 struct http_txn *txn = l7;
7639 struct hdr_idx *idx = &txn->hdr_idx;
7640 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7641
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7642 if (!txn)
7643 return 0;
7644
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7645 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7646 /* search for header from the beginning */
7647 ctx->idx = 0;
7648
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7649 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7650 test->flags |= ACL_TEST_F_FETCH_MORE;
7651 test->flags |= ACL_TEST_F_VOL_HDR;
7652 test->len = ctx->vlen;
7653 test->ptr = (char *)ctx->line + ctx->val;
7654 return 1;
7655 }
7656
7657 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7658 test->flags |= ACL_TEST_F_VOL_HDR;
7659 return 0;
7660}
7661
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7662static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7663acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
7664 struct acl_expr *expr, struct acl_test *test)
7665{
7666 struct http_txn *txn = l7;
7667
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7668 if (!txn)
7669 return 0;
7670
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7671 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7672 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7673
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7674 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7675 /* ensure the indexes are not affected */
7676 return 0;
7677
7678 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
7679}
7680
7681static int
7682acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
7683 struct acl_expr *expr, struct acl_test *test)
7684{
7685 struct http_txn *txn = l7;
7686
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7687 if (!txn)
7688 return 0;
7689
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7690 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7691 return 0;
7692
7693 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
7694}
7695
7696/* 6. Check on HTTP header count. The number of occurrences is returned.
7697 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
7698 */
7699static int
7700acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7701 struct acl_expr *expr, struct acl_test *test)
7702{
7703 struct http_txn *txn = l7;
7704 struct hdr_idx *idx = &txn->hdr_idx;
7705 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7706 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7707
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7708 if (!txn)
7709 return 0;
7710
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7711 ctx.idx = 0;
7712 cnt = 0;
7713 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
7714 cnt++;
7715
7716 test->i = cnt;
7717 test->flags = ACL_TEST_F_VOL_HDR;
7718 return 1;
7719}
7720
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7721static int
7722acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
7723 struct acl_expr *expr, struct acl_test *test)
7724{
7725 struct http_txn *txn = l7;
7726
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7727 if (!txn)
7728 return 0;
7729
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7730 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7731 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7732
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7733 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7734 /* ensure the indexes are not affected */
7735 return 0;
7736
7737 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
7738}
7739
7740static int
7741acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
7742 struct acl_expr *expr, struct acl_test *test)
7743{
7744 struct http_txn *txn = l7;
7745
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7746 if (!txn)
7747 return 0;
7748
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7749 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7750 return 0;
7751
7752 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
7753}
7754
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7755/* 7. Check on HTTP header's integer value. The integer value is returned.
7756 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7757 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7758 */
7759static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7760acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7761 struct acl_expr *expr, struct acl_test *test)
7762{
7763 struct http_txn *txn = l7;
7764 struct hdr_idx *idx = &txn->hdr_idx;
7765 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7766
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7767 if (!txn)
7768 return 0;
7769
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7770 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7771 /* search for header from the beginning */
7772 ctx->idx = 0;
7773
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7774 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7775 test->flags |= ACL_TEST_F_FETCH_MORE;
7776 test->flags |= ACL_TEST_F_VOL_HDR;
7777 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
7778 return 1;
7779 }
7780
7781 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7782 test->flags |= ACL_TEST_F_VOL_HDR;
7783 return 0;
7784}
7785
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7786static int
7787acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
7788 struct acl_expr *expr, struct acl_test *test)
7789{
7790 struct http_txn *txn = l7;
7791
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7792 if (!txn)
7793 return 0;
7794
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7795 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7796 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7797
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7798 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7799 /* ensure the indexes are not affected */
7800 return 0;
7801
7802 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
7803}
7804
7805static int
7806acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
7807 struct acl_expr *expr, struct acl_test *test)
7808{
7809 struct http_txn *txn = l7;
7810
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7811 if (!txn)
7812 return 0;
7813
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7814 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7815 return 0;
7816
7817 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
7818}
7819
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7820/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
7821 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
7822 */
7823static int
7824acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
7825 struct acl_expr *expr, struct acl_test *test)
7826{
7827 struct http_txn *txn = l7;
7828 struct hdr_idx *idx = &txn->hdr_idx;
7829 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
7830
7831 if (!txn)
7832 return 0;
7833
7834 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7835 /* search for header from the beginning */
7836 ctx->idx = 0;
7837
7838 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7839 test->flags |= ACL_TEST_F_FETCH_MORE;
7840 test->flags |= ACL_TEST_F_VOL_HDR;
7841 /* Same optimization as url_ip */
7842 memset(&l4->srv_addr.sin_addr, 0, sizeof(l4->srv_addr.sin_addr));
7843 url2ip((char *)ctx->line + ctx->val, &l4->srv_addr.sin_addr);
7844 test->ptr = (void *)&l4->srv_addr.sin_addr;
7845 test->i = AF_INET;
7846 return 1;
7847 }
7848
7849 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7850 test->flags |= ACL_TEST_F_VOL_HDR;
7851 return 0;
7852}
7853
7854static int
7855acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7856 struct acl_expr *expr, struct acl_test *test)
7857{
7858 struct http_txn *txn = l7;
7859
7860 if (!txn)
7861 return 0;
7862
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7863 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7864 return 0;
7865
7866 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7867 /* ensure the indexes are not affected */
7868 return 0;
7869
7870 return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
7871}
7872
7873static int
7874acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7875 struct acl_expr *expr, struct acl_test *test)
7876{
7877 struct http_txn *txn = l7;
7878
7879 if (!txn)
7880 return 0;
7881
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7882 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7883 return 0;
7884
7885 return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
7886}
7887
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7888/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
7889 * the first '/' after the possible hostname, and ends before the possible '?'.
7890 */
7891static int
7892acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
7893 struct acl_expr *expr, struct acl_test *test)
7894{
7895 struct http_txn *txn = l7;
7896 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7897
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7898 if (!txn)
7899 return 0;
7900
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7901 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7902 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7903
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7904 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7905 /* ensure the indexes are not affected */
7906 return 0;
7907
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7908 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]7909 ptr = http_get_path(txn);
7910 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7911 return 0;
7912
7913 /* OK, we got the '/' ! */
7914 test->ptr = ptr;
7915
7916 while (ptr < end && *ptr != '?')
7917 ptr++;
7918
7919 test->len = ptr - test->ptr;
7920
7921 /* we do not need to set READ_ONLY because the data is in a buffer */
7922 test->flags = ACL_TEST_F_VOL_1ST;
7923 return 1;
7924}
7925
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7926static int
7927acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
7928 struct acl_expr *expr, struct acl_test *test)
7929{
7930 struct buffer *req = s->req;
7931 struct http_txn *txn = &s->txn;
7932 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7933
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7934 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
7935 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
7936 */
7937
7938 if (!s || !req)
7939 return 0;
7940
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7941 if (unlikely(msg->msg_state >= HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7942 /* Already decoded as OK */
7943 test->flags |= ACL_TEST_F_SET_RES_PASS;
7944 return 1;
7945 }
7946
7947 /* Try to decode HTTP request */
7948 if (likely(req->lr < req->r))
7949 http_msg_analyzer(req, msg, &txn->hdr_idx);
7950
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7951 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7952 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
7953 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7954 return 1;
7955 }
7956 /* wait for final state */
7957 test->flags |= ACL_TEST_F_MAY_CHANGE;
7958 return 0;
7959 }
7960
7961 /* OK we got a valid HTTP request. We have some minor preparation to
7962 * perform so that further checks can rely on HTTP tests.
7963 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7964 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7965 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
7966 s->flags |= SN_REDIRECTABLE;
7967
7968 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
7969 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7970 return 1;
7971 }
7972
7973 test->flags |= ACL_TEST_F_SET_RES_PASS;
7974 return 1;
7975}
7976
Willy Tarreau7f18e522010-10-22 20:04:13 +0200[diff] [blame]7977/* return a valid test if the current request is the first one on the connection */
7978static int
7979acl_fetch_http_first_req(struct proxy *px, struct session *s, void *l7, int dir,
7980 struct acl_expr *expr, struct acl_test *test)
7981{
7982 if (!s)
7983 return 0;
7984
7985 if (s->txn.flags & TX_NOT_FIRST)
7986 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7987 else
7988 test->flags |= ACL_TEST_F_SET_RES_PASS;
7989
7990 return 1;
7991}
7992
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7993static int
7994acl_fetch_http_auth(struct proxy *px, struct session *s, void *l7, int dir,
7995 struct acl_expr *expr, struct acl_test *test)
7996{
7997
7998 if (!s)
7999 return 0;
8000
8001 if (!get_http_auth(s))
8002 return 0;
8003
8004 test->ctx.a[0] = expr->arg.ul;
8005 test->ctx.a[1] = s->txn.auth.user;
8006 test->ctx.a[2] = s->txn.auth.pass;
8007
8008 test->flags |= ACL_TEST_F_READ_ONLY | ACL_TEST_F_NULL_MATCH;
8009
8010 return 1;
8011}
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8012
8013/************************************************************************/
8014/* All supported keywords must be declared here. */
8015/************************************************************************/
8016
8017/* Note: must not be declared <const> as its list will be overwritten */
8018static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]8019 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
8020
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8021 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8022 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
8023 { "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]8024 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8025
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8026 { "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]8027 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8028 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8029 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8030 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8031 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
8032 { "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]8033 { "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]8034 { "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]8035
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]8036 /* 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]8037 { "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]8038 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
8039 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8040 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8041 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8042 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8043 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
8044 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
8045 { "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]8046 { "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]8047
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8048 { "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]8049 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
8050 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
8051 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
8052 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
8053 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
8054 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
8055 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
8056 { "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]8057 { "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]8058
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]8059 { "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]8060 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
8061 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
8062 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
8063 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
8064 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
8065 { "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]8066
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]8067#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8068 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
8069 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
8070 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
8071 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
8072 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
8073 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
8074 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
8075
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8076 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
8077 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
8078 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
8079 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
8080 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
8081 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
8082 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
8083 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]8084#endif
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8085
Willy Tarreau7f18e522010-10-22 20:04:13 +0200[diff] [blame]8086 { "http_auth", acl_parse_nothing, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT },
8087 { "http_auth_group", acl_parse_strcat, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT },
8088 { "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]8089 { NULL, NULL, NULL, NULL },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8090}};
8091
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8092/************************************************************************/
8093/* The code below is dedicated to pattern fetching and matching */
8094/************************************************************************/
8095
8096/* extract the IP address from the last occurrence of specified header. Note
8097 * that we should normally first extract the string then convert it to IP,
8098 * but right now we have all the functions to do this seemlessly, and we will
8099 * be able to change that later without touching the configuration.
8100 */
8101static int
8102pattern_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
8103 const char *arg, int arg_len, union pattern_data *data)
8104{
8105 struct http_txn *txn = l7;
8106
8107 data->ip.s_addr = htonl(get_ip_from_hdr2(&txn->req, arg, arg_len, &txn->hdr_idx, -1));
8108 return data->ip.s_addr != 0;
8109}
8110
8111/************************************************************************/
8112/* All supported keywords must be declared here. */
8113/************************************************************************/
8114/* Note: must not be declared <const> as its list will be overwritten */
8115static struct pattern_fetch_kw_list pattern_fetch_keywords = {{ },{
8116 { "hdr", pattern_fetch_hdr_ip, PATTERN_TYPE_IP, PATTERN_FETCH_REQ },
8117 { NULL, NULL, 0, 0 },
8118}};
8119
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8120
8121__attribute__((constructor))
8122static void __http_protocol_init(void)
8123{
8124 acl_register_keywords(&acl_kws);
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]8125 pattern_register_fetches(&pattern_fetch_keywords);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]8126}
8127
8128
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]8129/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]8130 * Local variables:
8131 * c-indent-level: 8
8132 * c-basic-offset: 8
8133 * End:
8134 */