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git01.mediatek.com / haproxy / 3193685865c95c43cfbf1f26b70af8678e9b1bd3 / . / src / proto_http.c
blob: 4e4ac4db1f78825204ab68f325cb7cd195762ff9 [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];
840const char sess_cookie[4] = "NIDV"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie */
841const char sess_set_cookie[8] = "N1I3PD5R"; /* No set-cookie, unknown, Set-Cookie Inserted, unknown,
842 Set-cookie seen and left unchanged (passive), Set-cookie Deleted,
843 unknown, Set-cookie Rewritten */
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
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2842/* This stream analyser runs all HTTP request processing which is common to
2843 * frontends and backends, which means blocking ACLs, filters, connection-close,
2844 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2845 * 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]2846 * either needs more data or wants to immediately abort the request (eg: deny,
2847 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2848 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2849int 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]2850{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2851 struct http_txn *txn = &s->txn;
2852 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2853 struct acl_cond *cond;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2854 struct req_acl_rule *req_acl, *req_acl_final = NULL;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2855 struct redirect_rule *rule;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]2856 struct cond_wordlist *wl;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2857 int del_ka, del_cl, do_stats;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2858
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2859 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2860 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2861 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2862 return 0;
2863 }
2864
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2865 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2866 req->analyse_exp = TICK_ETERNITY;
2867
2868 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2869 now_ms, __FUNCTION__,
2870 s,
2871 req,
2872 req->rex, req->wex,
2873 req->flags,
2874 req->l,
2875 req->analysers);
2876
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2877 /* first check whether we have some ACLs set to block this request */
2878 list_for_each_entry(cond, &px->block_cond, list) {
2879 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]2880
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2881 ret = acl_pass(ret);
2882 if (cond->pol == ACL_COND_UNLESS)
2883 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]2884
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2885 if (ret) {
2886 txn->status = 403;
2887 /* let's log the request time */
2888 s->logs.tv_request = now;
2889 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2890 session_inc_http_err_ctr(s);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2891 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2892 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2893 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2894
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2895 do_stats = stats_check_uri(s, px);
2896
2897 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]2898 int ret = 1;
2899
2900 if (req_acl->action >= PR_REQ_ACL_ACT_MAX)
2901 continue;
2902
2903 /* check condition, but only if attached */
Krzysztof Olędzki711ad9e2010-02-01 12:36:53 +0100[diff] [blame]2904 if (req_acl->cond) {
2905 ret = acl_exec_cond(req_acl->cond, px, s, txn, ACL_DIR_REQ);
2906 ret = acl_pass(ret);
Willy Tarreau51425942010-02-01 10:40:19 +0100[diff] [blame]2907
Krzysztof Olędzki711ad9e2010-02-01 12:36:53 +0100[diff] [blame]2908 if (req_acl->cond->pol == ACL_COND_UNLESS)
2909 ret = !ret;
2910 }
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2911
2912 if (ret) {
2913 req_acl_final = req_acl;
2914 break;
2915 }
2916 }
2917
2918 if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_DENY) {
2919 txn->status = 403;
2920 s->logs.tv_request = now;
2921 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2922 session_inc_http_err_ctr(s);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2923 goto return_prx_cond;
2924 }
2925
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2926 /* try headers filters */
2927 if (px->req_exp != NULL) {
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]2928 if (apply_filters_to_request(s, req, px) < 0)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2929 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2930
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2931 /* has the request been denied ? */
2932 if (txn->flags & TX_CLDENY) {
2933 /* no need to go further */
2934 txn->status = 403;
2935 /* let's log the request time */
2936 s->logs.tv_request = now;
2937 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2938 session_inc_http_err_ctr(s);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2939 goto return_prx_cond;
2940 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2941
2942 /* When a connection is tarpitted, we use the tarpit timeout,
2943 * which may be the same as the connect timeout if unspecified.
2944 * If unset, then set it to zero because we really want it to
2945 * eventually expire. We build the tarpit as an analyser.
2946 */
2947 if (txn->flags & TX_CLTARPIT) {
2948 buffer_erase(s->req);
2949 /* wipe the request out so that we can drop the connection early
2950 * if the client closes first.
2951 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2952 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2953 req->analysers = 0; /* remove switching rules etc... */
2954 req->analysers |= AN_REQ_HTTP_TARPIT;
2955 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
2956 if (!req->analyse_exp)
2957 req->analyse_exp = tick_add(now_ms, 0);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]2958 session_inc_http_err_ctr(s);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2959 return 1;
2960 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2961 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2962
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2963 /* Until set to anything else, the connection mode is set as TUNNEL. It will
2964 * only change if both the request and the config reference something else.
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2965 * Option httpclose by itself does not set a mode, it remains a tunnel mode
2966 * in which headers are mangled. However, if another mode is set, it will
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2967 * affect it (eg: server-close/keep-alive + httpclose = close). Note that we
2968 * avoid to redo the same work if FE and BE have the same settings (common).
2969 * The method consists in checking if options changed between the two calls
2970 * (implying that either one is non-null, or one of them is non-null and we
2971 * are there for the first time.
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2972 */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2973
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2974 del_cl = del_ka = 0;
2975
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]2976 if ((!(txn->flags & TX_HDR_CONN_PRS) &&
2977 (s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) ||
2978 ((s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) !=
2979 (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]2980 int tmp = TX_CON_WANT_TUN;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2981
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2982 if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE)
2983 tmp = TX_CON_WANT_KAL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2984 if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO)
2985 tmp = TX_CON_WANT_SCL;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2986 if ((s->fe->options|s->be->options) & PR_O_FORCE_CLO)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2987 tmp = TX_CON_WANT_CLO;
2988
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2989 if ((txn->flags & TX_CON_WANT_MSK) < tmp)
2990 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2991
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2992 if (!(txn->flags & TX_HDR_CONN_PRS)) {
2993 /* parse the Connection header and possibly clean it */
2994 int to_del = 0;
2995 if ((txn->flags & TX_REQ_VER_11) ||
Willy Tarreau8a8e1d92010-04-05 16:15:16 +0200[diff] [blame]2996 ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL &&
2997 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2998 to_del |= 2; /* remove "keep-alive" */
2999 if (!(txn->flags & TX_REQ_VER_11))
3000 to_del |= 1; /* remove "close" */
3001 http_parse_connection_header(txn, msg, req, to_del);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]3002 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3003
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3004 /* check if client or config asks for explicit close in KAL/SCL */
3005 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
3006 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
3007 ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */
3008 (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]3009 (((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) && /* httpclose without pretend-ka... */
3010 1/*!((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)*/) || /* ... +any = forceclose */
Willy Tarreauc3e8b252010-01-28 15:01:20 +0100[diff] [blame]3011 !(txn->flags & TX_REQ_XFER_LEN) || /* no length known => close */
3012 s->fe->state == PR_STSTOPPED)) /* frontend is stopping */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3013 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
3014 }
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]3015
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3016 /* add request headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]3017 list_for_each_entry(wl, &px->req_add, list) {
Willy Tarreau8abd4cd2010-01-31 14:30:44 +0100[diff] [blame]3018 if (wl->cond) {
3019 int ret = acl_exec_cond(wl->cond, px, s, txn, ACL_DIR_REQ);
3020 ret = acl_pass(ret);
3021 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
3022 ret = !ret;
3023 if (!ret)
3024 continue;
3025 }
3026
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]3027 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]3028 goto return_bad_req;
3029 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3030
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3031 if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_HTTP_AUTH) {
3032 struct chunk msg;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3033 char *realm = req_acl->http_auth.realm;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3034
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3035 if (!realm)
3036 realm = do_stats?STATS_DEFAULT_REALM:px->id;
3037
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]3038 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]3039 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
3040 txn->status = 401;
3041 stream_int_retnclose(req->prod, &msg);
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3042 /* on 401 we still count one error, because normal browsing
3043 * won't significantly increase the counter but brute force
3044 * attempts will.
3045 */
3046 session_inc_http_err_ctr(s);
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]3047 goto return_prx_cond;
3048 }
3049
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3050 if (do_stats) {
3051 /* We need to provied stats for this request.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3052 * FIXME!!! that one is rather dangerous, we want to
3053 * make it follow standard rules (eg: clear req->analysers).
3054 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]3055
3056 s->logs.tv_request = now;
3057 s->data_source = DATA_SRC_STATS;
3058 s->data_state = DATA_ST_INIT;
3059 s->task->nice = -32; /* small boost for HTTP statistics */
3060 stream_int_register_handler(s->rep->prod, http_stats_io_handler);
3061 s->rep->prod->private = s;
3062 s->rep->prod->st0 = s->rep->prod->st1 = 0;
3063 req->analysers = 0;
3064
3065 return 0;
3066
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3067 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3068
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3069 /* check whether we have some ACLs set to redirect this request */
3070 list_for_each_entry(rule, &px->redirect_rules, list) {
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3071 int ret = ACL_PAT_PASS;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3072
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3073 if (rule->cond) {
3074 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
3075 ret = acl_pass(ret);
3076 if (rule->cond->pol == ACL_COND_UNLESS)
3077 ret = !ret;
3078 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3079
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3080 if (ret) {
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3081 struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 };
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3082 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3083
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3084 /* build redirect message */
3085 switch(rule->code) {
3086 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3087 msg_fmt = HTTP_303;
3088 break;
3089 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3090 msg_fmt = HTTP_301;
3091 break;
3092 case 302:
3093 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3094 msg_fmt = HTTP_302;
3095 break;
3096 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3097
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3098 if (unlikely(!chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3099 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3100
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3101 switch(rule->type) {
3102 case REDIRECT_TYPE_PREFIX: {
3103 const char *path;
3104 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3105
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3106 path = http_get_path(txn);
3107 /* build message using path */
3108 if (path) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3109 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]3110 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
3111 int qs = 0;
3112 while (qs < pathlen) {
3113 if (path[qs] == '?') {
3114 pathlen = qs;
3115 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3116 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3117 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3118 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3119 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3120 } else {
3121 path = "/";
3122 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3123 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3124
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3125 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3126 goto return_bad_req;
3127
3128 /* add prefix. Note that if prefix == "/", we don't want to
3129 * add anything, otherwise it makes it hard for the user to
3130 * configure a self-redirection.
3131 */
3132 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3133 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3134 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3135 }
3136
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3137 /* add path */
3138 memcpy(rdr.str + rdr.len, path, pathlen);
3139 rdr.len += pathlen;
Willy Tarreau81e3b4f2010-01-10 00:42:19 +0100[diff] [blame]3140
3141 /* append a slash at the end of the location is needed and missing */
3142 if (rdr.len && rdr.str[rdr.len - 1] != '/' &&
3143 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
3144 if (rdr.len > rdr.size - 5)
3145 goto return_bad_req;
3146 rdr.str[rdr.len] = '/';
3147 rdr.len++;
3148 }
3149
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3150 break;
3151 }
3152 case REDIRECT_TYPE_LOCATION:
3153 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3154 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3155 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3156
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3157 /* add location */
3158 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3159 rdr.len += rule->rdr_len;
3160 break;
3161 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3162
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3163 if (rule->cookie_len) {
3164 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
3165 rdr.len += 14;
3166 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
3167 rdr.len += rule->cookie_len;
3168 memcpy(rdr.str + rdr.len, "\r\n", 2);
3169 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3170 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3171
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3172 /* add end of headers and the keep-alive/close status.
3173 * We may choose to set keep-alive if the Location begins
3174 * with a slash, because the client will come back to the
3175 * same server.
3176 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3177 txn->status = rule->code;
3178 /* let's log the request time */
3179 s->logs.tv_request = now;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3180
3181 if (rule->rdr_len >= 1 && *rule->rdr_str == '/' &&
3182 (txn->flags & TX_REQ_XFER_LEN) &&
3183 !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.hdr_content_len &&
3184 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
3185 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
3186 /* keep-alive possible */
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3187 if (!(txn->flags & TX_REQ_VER_11)) {
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3188 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3189 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: keep-alive", 30);
3190 rdr.len += 30;
3191 } else {
3192 memcpy(rdr.str + rdr.len, "\r\nConnection: keep-alive", 24);
3193 rdr.len += 24;
3194 }
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3195 }
3196 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
3197 rdr.len += 4;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3198 buffer_write(req->prod->ob, rdr.str, rdr.len);
3199 /* "eat" the request */
3200 buffer_ignore(req, msg->sov - msg->som);
3201 msg->som = msg->sov;
3202 req->analysers = AN_REQ_HTTP_XFER_BODY;
Willy Tarreau9300fb22010-01-05 00:58:24 +0100[diff] [blame]3203 s->rep->analysers = AN_RES_HTTP_XFER_BODY;
3204 txn->req.msg_state = HTTP_MSG_CLOSED;
3205 txn->rsp.msg_state = HTTP_MSG_DONE;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3206 break;
3207 } else {
3208 /* keep-alive not possible */
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3209 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3210 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
3211 rdr.len += 29;
3212 } else {
3213 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
3214 rdr.len += 23;
3215 }
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]3216 stream_int_retnclose(req->prod, &rdr);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3217 goto return_prx_cond;
3218 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3219 }
3220 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3221
Willy Tarreau2be39392010-01-03 17:24:51 +0100[diff] [blame]3222 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
3223 * If this happens, then the data will not come immediately, so we must
3224 * send all what we have without waiting. Note that due to the small gain
3225 * in waiting for the body of the request, it's easier to simply put the
3226 * BF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
3227 * itself once used.
3228 */
3229 req->flags |= BF_SEND_DONTWAIT;
3230
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3231 /* that's OK for us now, let's move on to next analysers */
3232 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]3233
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3234 return_bad_req:
3235 /* We centralize bad requests processing here */
3236 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
3237 /* we detected a parsing error. We want to archive this request
3238 * in the dedicated proxy area for later troubleshooting.
3239 */
3240 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
3241 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3242
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3243 txn->req.msg_state = HTTP_MSG_ERROR;
3244 txn->status = 400;
3245 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3246
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3247 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3248 if (s->listener->counters)
3249 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]3250
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3251 return_prx_cond:
3252 if (!(s->flags & SN_ERR_MASK))
3253 s->flags |= SN_ERR_PRXCOND;
3254 if (!(s->flags & SN_FINST_MASK))
3255 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]3256
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3257 req->analysers = 0;
3258 req->analyse_exp = TICK_ETERNITY;
3259 return 0;
3260}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3261
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3262/* This function performs all the processing enabled for the current request.
3263 * It returns 1 if the processing can continue on next analysers, or zero if it
3264 * needs more data, encounters an error, or wants to immediately abort the
3265 * request. It relies on buffers flags, and updates s->req->analysers.
3266 */
3267int http_process_request(struct session *s, struct buffer *req, int an_bit)
3268{
3269 struct http_txn *txn = &s->txn;
3270 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3271
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3272 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3273 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3274 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3275 return 0;
3276 }
3277
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3278 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3279 now_ms, __FUNCTION__,
3280 s,
3281 req,
3282 req->rex, req->wex,
3283 req->flags,
3284 req->l,
3285 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3286
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3287 /*
3288 * Right now, we know that we have processed the entire headers
3289 * and that unwanted requests have been filtered out. We can do
3290 * whatever we want with the remaining request. Also, now we
3291 * may have separate values for ->fe, ->be.
3292 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3293
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3294 /*
3295 * If HTTP PROXY is set we simply get remote server address
3296 * parsing incoming request.
3297 */
3298 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3299 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]3300 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3301
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3302 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3303 * 7: Now we can work with the cookies.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3304 * Note that doing so might move headers in the request, but
3305 * the fields will stay coherent and the URI will not move.
3306 * This should only be performed in the backend.
3307 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]3308 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3309 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
3310 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]3311
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3312 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3313 * 8: the appsession cookie was looked up very early in 1.2,
3314 * so let's do the same now.
3315 */
3316
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]3317 /* It needs to look into the URI unless persistence must be ignored */
3318 if ((txn->sessid == NULL) && s->be->appsession_name && !(s->flags & SN_IGNORE_PRST)) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3319 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]3320 }
3321
3322 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3323 * 9: add X-Forwarded-For if either the frontend or the backend
3324 * asks for it.
3325 */
3326 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
3327 if (s->cli_addr.ss_family == AF_INET) {
3328 /* Add an X-Forwarded-For header unless the source IP is
3329 * in the 'except' network range.
3330 */
3331 if ((!s->fe->except_mask.s_addr ||
3332 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr)
3333 != s->fe->except_net.s_addr) &&
3334 (!s->be->except_mask.s_addr ||
3335 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr)
3336 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3337 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3338 unsigned char *pn;
3339 pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3340
3341 /* Note: we rely on the backend to get the header name to be used for
3342 * x-forwarded-for, because the header is really meant for the backends.
3343 * However, if the backend did not specify any option, we have to rely
3344 * on the frontend's header name.
3345 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3346 if (s->be->fwdfor_hdr_len) {
3347 len = s->be->fwdfor_hdr_len;
3348 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3349 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3350 len = s->fe->fwdfor_hdr_len;
3351 memcpy(trash, s->fe->fwdfor_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3352 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3353 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]3354
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]3355 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3356 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3357 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3358 }
3359 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3360 else if (s->cli_addr.ss_family == AF_INET6) {
3361 /* FIXME: for the sake of completeness, we should also support
3362 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3363 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3364 int len;
3365 char pn[INET6_ADDRSTRLEN];
3366 inet_ntop(AF_INET6,
3367 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
3368 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3369
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3370 /* Note: we rely on the backend to get the header name to be used for
3371 * x-forwarded-for, because the header is really meant for the backends.
3372 * However, if the backend did not specify any option, we have to rely
3373 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3374 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3375 if (s->be->fwdfor_hdr_len) {
3376 len = s->be->fwdfor_hdr_len;
3377 memcpy(trash, s->be->fwdfor_hdr_name, len);
3378 } else {
3379 len = s->fe->fwdfor_hdr_len;
3380 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3381 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3382 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3383
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3384 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3385 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3386 goto return_bad_req;
3387 }
3388 }
3389
3390 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3391 * 10: add X-Original-To if either the frontend or the backend
3392 * asks for it.
3393 */
3394 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
3395
3396 /* FIXME: don't know if IPv6 can handle that case too. */
3397 if (s->cli_addr.ss_family == AF_INET) {
3398 /* Add an X-Original-To header unless the destination IP is
3399 * in the 'except' network range.
3400 */
3401 if (!(s->flags & SN_FRT_ADDR_SET))
3402 get_frt_addr(s);
3403
3404 if ((!s->fe->except_mask_to.s_addr ||
3405 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
3406 != s->fe->except_to.s_addr) &&
3407 (!s->be->except_mask_to.s_addr ||
3408 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
3409 != s->be->except_to.s_addr)) {
3410 int len;
3411 unsigned char *pn;
3412 pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr;
3413
3414 /* Note: we rely on the backend to get the header name to be used for
3415 * x-original-to, because the header is really meant for the backends.
3416 * However, if the backend did not specify any option, we have to rely
3417 * on the frontend's header name.
3418 */
3419 if (s->be->orgto_hdr_len) {
3420 len = s->be->orgto_hdr_len;
3421 memcpy(trash, s->be->orgto_hdr_name, len);
3422 } else {
3423 len = s->fe->orgto_hdr_len;
3424 memcpy(trash, s->fe->orgto_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3425 }
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3426 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
3427
3428 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3429 &txn->hdr_idx, trash, len) < 0))
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3430 goto return_bad_req;
3431 }
3432 }
3433 }
3434
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3435 /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set. */
3436 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3437 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) ||
3438 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3439 unsigned int want_flags = 0;
3440
3441 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3442 if (((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL ||
3443 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) &&
3444 !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3445 want_flags |= TX_CON_CLO_SET;
3446 } else {
Willy Tarreau22a95342010-09-29 14:31:41 +0200[diff] [blame]3447 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL &&
3448 !((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) ||
3449 ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3450 want_flags |= TX_CON_KAL_SET;
3451 }
3452
3453 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
3454 http_change_connection_header(txn, msg, req, want_flags);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3455 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3456
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3457
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3458 /* If we have no server assigned yet and we're balancing on url_param
3459 * with a POST request, we may be interested in checking the body for
3460 * that parameter. This will be done in another analyser.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3461 */
3462 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
3463 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3464 s->be->url_param_post_limit != 0 &&
3465 (txn->flags & (TX_REQ_CNT_LEN|TX_REQ_TE_CHNK)) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3466 memchr(msg->sol + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3467 buffer_dont_connect(req);
3468 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3469 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3470
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3471 if (txn->flags & TX_REQ_XFER_LEN)
3472 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]3473
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3474 /*************************************************************
3475 * OK, that's finished for the headers. We have done what we *
3476 * could. Let's switch to the DATA state. *
3477 ************************************************************/
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3478 req->analyse_exp = TICK_ETERNITY;
3479 req->analysers &= ~an_bit;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3480
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3481 s->logs.tv_request = now;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3482 /* OK let's go on with the BODY now */
3483 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3484
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3485 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3486 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3487 /* we detected a parsing error. We want to archive this request
3488 * in the dedicated proxy area for later troubleshooting.
3489 */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3490 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3491 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3492
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3493 txn->req.msg_state = HTTP_MSG_ERROR;
3494 txn->status = 400;
3495 req->analysers = 0;
3496 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3497
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3498 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3499 if (s->listener->counters)
3500 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3501
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3502 if (!(s->flags & SN_ERR_MASK))
3503 s->flags |= SN_ERR_PRXCOND;
3504 if (!(s->flags & SN_FINST_MASK))
3505 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3506 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3507}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3508
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3509/* This function is an analyser which processes the HTTP tarpit. It always
3510 * returns zero, at the beginning because it prevents any other processing
3511 * from occurring, and at the end because it terminates the request.
3512 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3513int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3514{
3515 struct http_txn *txn = &s->txn;
3516
3517 /* This connection is being tarpitted. The CLIENT side has
3518 * already set the connect expiration date to the right
3519 * timeout. We just have to check that the client is still
3520 * there and that the timeout has not expired.
3521 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3522 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3523 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
3524 !tick_is_expired(req->analyse_exp, now_ms))
3525 return 0;
3526
3527 /* We will set the queue timer to the time spent, just for
3528 * logging purposes. We fake a 500 server error, so that the
3529 * attacker will not suspect his connection has been tarpitted.
3530 * It will not cause trouble to the logs because we can exclude
3531 * the tarpitted connections by filtering on the 'PT' status flags.
3532 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3533 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
3534
3535 txn->status = 500;
3536 if (req->flags != BF_READ_ERROR)
3537 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
3538
3539 req->analysers = 0;
3540 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3541
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3542 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3543 if (s->listener->counters)
3544 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3545
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3546 if (!(s->flags & SN_ERR_MASK))
3547 s->flags |= SN_ERR_PRXCOND;
3548 if (!(s->flags & SN_FINST_MASK))
3549 s->flags |= SN_FINST_T;
3550 return 0;
3551}
3552
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3553/* This function is an analyser which processes the HTTP request body. It looks
3554 * for parameters to be used for the load balancing algorithm (url_param). It
3555 * must only be called after the standard HTTP request processing has occurred,
3556 * because it expects the request to be parsed. It returns zero if it needs to
3557 * read more data, or 1 once it has completed its analysis.
3558 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3559int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3560{
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3561 struct http_txn *txn = &s->txn;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3562 struct http_msg *msg = &s->txn.req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3563 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3564
3565 /* We have to parse the HTTP request body to find any required data.
3566 * "balance url_param check_post" should have been the only way to get
3567 * into this. We were brought here after HTTP header analysis, so all
3568 * related structures are ready.
3569 */
3570
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3571 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3572 goto missing_data;
3573
3574 if (msg->msg_state < HTTP_MSG_100_SENT) {
3575 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3576 * send an HTTP/1.1 100 Continue intermediate response.
3577 */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]3578 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3579 struct hdr_ctx ctx;
3580 ctx.idx = 0;
3581 /* Expect is allowed in 1.1, look for it */
3582 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3583 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3584 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3585 }
3586 }
3587 msg->msg_state = HTTP_MSG_100_SENT;
3588 }
3589
3590 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3591 /* we have msg->col and msg->sov which both point to the first
3592 * byte of message body. msg->som still points to the beginning
3593 * of the message. We must save the body in req->lr because it
3594 * survives buffer re-alignments.
3595 */
3596 req->lr = req->data + msg->sov;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3597 if (txn->flags & TX_REQ_TE_CHNK)
3598 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3599 else
3600 msg->msg_state = HTTP_MSG_DATA;
3601 }
3602
3603 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3604 /* read the chunk size and assign it to ->hdr_content_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3605 * set ->sov and ->lr to point to the body and switch to DATA or
3606 * TRAILERS state.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3607 */
3608 int ret = http_parse_chunk_size(req, msg);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3609
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3610 if (!ret)
3611 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3612 else if (ret < 0) {
3613 session_inc_http_err_ctr(s);
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3614 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3615 }
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3616 }
3617
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3618 /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3619 * We have the first non-header byte in msg->col, which is either the
3620 * beginning of the chunk size or of the data. The first data byte is in
3621 * msg->sov, which is equal to msg->col when not using transfer-encoding.
3622 * We're waiting for at least <url_param_post_limit> bytes after msg->sov.
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3623 */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3624
3625 if (msg->hdr_content_len < limit)
3626 limit = msg->hdr_content_len;
3627
Willy Tarreau7c96f672009-12-27 22:47:25 +0100[diff] [blame]3628 if (req->l - (msg->sov - msg->som) >= limit) /* we have enough bytes now */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3629 goto http_end;
3630
3631 missing_data:
3632 /* we get here if we need to wait for more data */
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3633 if (req->flags & BF_FULL) {
3634 session_inc_http_err_ctr(s);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3635 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]3636 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3637
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3638 if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
3639 txn->status = 408;
3640 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3641
3642 if (!(s->flags & SN_ERR_MASK))
3643 s->flags |= SN_ERR_CLITO;
3644 if (!(s->flags & SN_FINST_MASK))
3645 s->flags |= SN_FINST_D;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3646 goto return_err_msg;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3647 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3648
3649 /* we get here if we need to wait for more data */
3650 if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3651 /* Not enough data. We'll re-use the http-request
3652 * timeout here. Ideally, we should set the timeout
3653 * relative to the accept() date. We just set the
3654 * request timeout once at the beginning of the
3655 * request.
3656 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3657 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3658 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]3659 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3660 return 0;
3661 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3662
3663 http_end:
3664 /* The situation will not evolve, so let's give up on the analysis. */
3665 s->logs.tv_request = now; /* update the request timer to reflect full request */
3666 req->analysers &= ~an_bit;
3667 req->analyse_exp = TICK_ETERNITY;
3668 return 1;
3669
3670 return_bad_req: /* let's centralize all bad requests */
3671 txn->req.msg_state = HTTP_MSG_ERROR;
3672 txn->status = 400;
3673 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
3674
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]3675 if (!(s->flags & SN_ERR_MASK))
3676 s->flags |= SN_ERR_PRXCOND;
3677 if (!(s->flags & SN_FINST_MASK))
3678 s->flags |= SN_FINST_R;
3679
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3680 return_err_msg:
3681 req->analysers = 0;
3682 s->fe->counters.failed_req++;
3683 if (s->listener->counters)
3684 s->listener->counters->failed_req++;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3685 return 0;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3686}
3687
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3688/* Terminate current transaction and prepare a new one. This is very tricky
3689 * right now but it works.
3690 */
3691void http_end_txn_clean_session(struct session *s)
3692{
3693 /* FIXME: We need a more portable way of releasing a backend's and a
3694 * server's connections. We need a safer way to reinitialize buffer
3695 * flags. We also need a more accurate method for computing per-request
3696 * data.
3697 */
3698 http_silent_debug(__LINE__, s);
3699
3700 s->req->cons->flags |= SI_FL_NOLINGER;
3701 s->req->cons->shutr(s->req->cons);
3702 s->req->cons->shutw(s->req->cons);
3703
3704 http_silent_debug(__LINE__, s);
3705
3706 if (s->flags & SN_BE_ASSIGNED)
3707 s->be->beconn--;
3708
3709 s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
3710 session_process_counters(s);
Willy Tarreauf059a0f2010-08-03 16:29:52 +0200[diff] [blame]3711 session_stop_backend_counters(s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3712
3713 if (s->txn.status) {
3714 int n;
3715
3716 n = s->txn.status / 100;
3717 if (n < 1 || n > 5)
3718 n = 0;
3719
3720 if (s->fe->mode == PR_MODE_HTTP)
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3721 s->fe->counters.fe.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3722
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3723 if ((s->flags & SN_BE_ASSIGNED) &&
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3724 (s->be->mode == PR_MODE_HTTP))
Willy Tarreau24657792010-02-26 10:30:28 +0100[diff] [blame]3725 s->be->counters.be.http.rsp[n]++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3726 }
3727
3728 /* don't count other requests' data */
3729 s->logs.bytes_in -= s->req->l - s->req->send_max;
3730 s->logs.bytes_out -= s->rep->l - s->rep->send_max;
3731
3732 /* let's do a final log if we need it */
3733 if (s->logs.logwait &&
3734 !(s->flags & SN_MONITOR) &&
3735 (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
3736 s->do_log(s);
3737 }
3738
3739 s->logs.accept_date = date; /* user-visible date for logging */
3740 s->logs.tv_accept = now; /* corrected date for internal use */
3741 tv_zero(&s->logs.tv_request);
3742 s->logs.t_queue = -1;
3743 s->logs.t_connect = -1;
3744 s->logs.t_data = -1;
3745 s->logs.t_close = 0;
3746 s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
3747 s->logs.srv_queue_size = 0; /* we will get this number soon */
3748
3749 s->logs.bytes_in = s->req->total = s->req->l - s->req->send_max;
3750 s->logs.bytes_out = s->rep->total = s->rep->l - s->rep->send_max;
3751
3752 if (s->pend_pos)
3753 pendconn_free(s->pend_pos);
3754
3755 if (s->srv) {
3756 if (s->flags & SN_CURR_SESS) {
3757 s->flags &= ~SN_CURR_SESS;
3758 s->srv->cur_sess--;
3759 }
3760 if (may_dequeue_tasks(s->srv, s->be))
3761 process_srv_queue(s->srv);
3762 }
3763
3764 if (unlikely(s->srv_conn))
3765 sess_change_server(s, NULL);
3766 s->srv = NULL;
3767
3768 s->req->cons->state = s->req->cons->prev_state = SI_ST_INI;
3769 s->req->cons->fd = -1; /* just to help with debugging */
3770 s->req->cons->err_type = SI_ET_NONE;
3771 s->req->cons->err_loc = NULL;
3772 s->req->cons->exp = TICK_ETERNITY;
3773 s->req->cons->flags = SI_FL_NONE;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3774 s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST);
3775 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]3776 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]3777 s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE);
3778 s->txn.meth = 0;
3779 http_reset_txn(s);
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]3780 s->txn.flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ;
Willy Tarreauee55dc02010-06-01 10:56:34 +0200[diff] [blame]3781 if (s->fe->options2 & PR_O2_INDEPSTR)
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3782 s->req->cons->flags |= SI_FL_INDEP_STR;
3783
3784 /* if the request buffer is not empty, it means we're
3785 * about to process another request, so send pending
3786 * data with MSG_MORE to merge TCP packets when possible.
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3787 * Just don't do this if the buffer is close to be full,
3788 * because the request will wait for it to flush a little
3789 * bit before proceeding.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3790 */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3791 if (s->req->l > s->req->send_max) {
3792 if (s->rep->send_max &&
3793 !(s->rep->flags & BF_FULL) &&
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3794 s->rep->r <= s->rep->data + s->rep->size - global.tune.maxrewrite)
3795 s->rep->flags |= BF_EXPECT_MORE;
3796 }
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3797
3798 /* we're removing the analysers, we MUST re-enable events detection */
3799 buffer_auto_read(s->req);
3800 buffer_auto_close(s->req);
3801 buffer_auto_read(s->rep);
3802 buffer_auto_close(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3803
3804 /* make ->lr point to the first non-forwarded byte */
3805 s->req->lr = s->req->w + s->req->send_max;
3806 if (s->req->lr >= s->req->data + s->req->size)
3807 s->req->lr -= s->req->size;
3808 s->rep->lr = s->rep->w + s->rep->send_max;
3809 if (s->rep->lr >= s->rep->data + s->rep->size)
3810 s->rep->lr -= s->req->size;
3811
Willy Tarreau6df7a0e2010-08-03 11:52:10 +0200[diff] [blame]3812 s->req->analysers |= s->listener->analysers;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3813 s->rep->analysers = 0;
3814
3815 http_silent_debug(__LINE__, s);
3816}
3817
3818
3819/* This function updates the request state machine according to the response
3820 * state machine and buffer flags. It returns 1 if it changes anything (flag
3821 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
3822 * it is only used to find when a request/response couple is complete. Both
3823 * this function and its equivalent should loop until both return zero. It
3824 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
3825 */
3826int http_sync_req_state(struct session *s)
3827{
3828 struct buffer *buf = s->req;
3829 struct http_txn *txn = &s->txn;
3830 unsigned int old_flags = buf->flags;
3831 unsigned int old_state = txn->req.msg_state;
3832
3833 http_silent_debug(__LINE__, s);
3834 if (unlikely(txn->req.msg_state < HTTP_MSG_BODY))
3835 return 0;
3836
3837 if (txn->req.msg_state == HTTP_MSG_DONE) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3838 /* No need to read anymore, the request was completely parsed.
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]3839 * We can shut the read side unless we want to abort_on_close,
3840 * or we have a POST request. The issue with POST requests is
3841 * that some browsers still send a CRLF after the request, and
3842 * this CRLF must be read so that it does not remain in the kernel
3843 * buffers, otherwise a close could cause an RST on some systems
3844 * (eg: Linux).
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3845 */
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]3846 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3847 buffer_dont_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3848
3849 if (txn->rsp.msg_state == HTTP_MSG_ERROR)
3850 goto wait_other_side;
3851
3852 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
3853 /* The server has not finished to respond, so we
3854 * don't want to move in order not to upset it.
3855 */
3856 goto wait_other_side;
3857 }
3858
3859 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
3860 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3861 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3862 txn->req.msg_state = HTTP_MSG_TUNNEL;
3863 goto wait_other_side;
3864 }
3865
3866 /* When we get here, it means that both the request and the
3867 * response have finished receiving. Depending on the connection
3868 * mode, we'll have to wait for the last bytes to leave in either
3869 * direction, and sometimes for a close to be effective.
3870 */
3871
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3872 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
3873 /* Server-close mode : queue a connection close to the server */
3874 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW)))
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3875 buffer_shutw_now(buf);
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3876 }
3877 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
3878 /* Option forceclose is set, or either side wants to close,
3879 * let's enforce it now that we're not expecting any new
3880 * data to come. The caller knows the session is complete
3881 * once both states are CLOSED.
3882 */
3883 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3884 buffer_shutr_now(buf);
3885 buffer_shutw_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3886 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3887 }
3888 else {
3889 /* The last possible modes are keep-alive and tunnel. Since tunnel
3890 * mode does not set the body analyser, we can't reach this place
3891 * in tunnel mode, so we're left with keep-alive only.
3892 * This mode is currently not implemented, we switch to tunnel mode.
3893 */
3894 buffer_auto_read(buf);
3895 txn->req.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3896 }
3897
3898 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
3899 /* if we've just closed an output, let's switch */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3900 buf->cons->flags |= SI_FL_NOLINGER; /* we want to close ASAP */
3901
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3902 if (!(buf->flags & BF_OUT_EMPTY)) {
3903 txn->req.msg_state = HTTP_MSG_CLOSING;
3904 goto http_msg_closing;
3905 }
3906 else {
3907 txn->req.msg_state = HTTP_MSG_CLOSED;
3908 goto http_msg_closed;
3909 }
3910 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3911 goto wait_other_side;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3912 }
3913
3914 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
3915 http_msg_closing:
3916 /* nothing else to forward, just waiting for the output buffer
3917 * to be empty and for the shutw_now to take effect.
3918 */
3919 if (buf->flags & BF_OUT_EMPTY) {
3920 txn->req.msg_state = HTTP_MSG_CLOSED;
3921 goto http_msg_closed;
3922 }
3923 else if (buf->flags & BF_SHUTW) {
3924 txn->req.msg_state = HTTP_MSG_ERROR;
3925 goto wait_other_side;
3926 }
3927 }
3928
3929 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
3930 http_msg_closed:
3931 goto wait_other_side;
3932 }
3933
3934 wait_other_side:
3935 http_silent_debug(__LINE__, s);
3936 return txn->req.msg_state != old_state || buf->flags != old_flags;
3937}
3938
3939
3940/* This function updates the response state machine according to the request
3941 * state machine and buffer flags. It returns 1 if it changes anything (flag
3942 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
3943 * it is only used to find when a request/response couple is complete. Both
3944 * this function and its equivalent should loop until both return zero. It
3945 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
3946 */
3947int http_sync_res_state(struct session *s)
3948{
3949 struct buffer *buf = s->rep;
3950 struct http_txn *txn = &s->txn;
3951 unsigned int old_flags = buf->flags;
3952 unsigned int old_state = txn->rsp.msg_state;
3953
3954 http_silent_debug(__LINE__, s);
3955 if (unlikely(txn->rsp.msg_state < HTTP_MSG_BODY))
3956 return 0;
3957
3958 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
3959 /* In theory, we don't need to read anymore, but we must
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3960 * still monitor the server connection for a possible close
3961 * while the request is being uploaded, so we don't disable
3962 * reading.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3963 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3964 /* buffer_dont_read(buf); */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3965
3966 if (txn->req.msg_state == HTTP_MSG_ERROR)
3967 goto wait_other_side;
3968
3969 if (txn->req.msg_state < HTTP_MSG_DONE) {
3970 /* The client seems to still be sending data, probably
3971 * because we got an error response during an upload.
3972 * We have the choice of either breaking the connection
3973 * or letting it pass through. Let's do the later.
3974 */
3975 goto wait_other_side;
3976 }
3977
3978 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
3979 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3980 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3981 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
3982 goto wait_other_side;
3983 }
3984
3985 /* When we get here, it means that both the request and the
3986 * response have finished receiving. Depending on the connection
3987 * mode, we'll have to wait for the last bytes to leave in either
3988 * direction, and sometimes for a close to be effective.
3989 */
3990
3991 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
3992 /* Server-close mode : shut read and wait for the request
3993 * side to close its output buffer. The caller will detect
3994 * when we're in DONE and the other is in CLOSED and will
3995 * catch that for the final cleanup.
3996 */
3997 if (!(buf->flags & (BF_SHUTR|BF_SHUTR_NOW)))
3998 buffer_shutr_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3999 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4000 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4001 /* Option forceclose is set, or either side wants to close,
4002 * let's enforce it now that we're not expecting any new
4003 * data to come. The caller knows the session is complete
4004 * once both states are CLOSED.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4005 */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4006 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
4007 buffer_shutr_now(buf);
4008 buffer_shutw_now(buf);
4009 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4010 }
4011 else {
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]4012 /* The last possible modes are keep-alive and tunnel. Since tunnel
4013 * mode does not set the body analyser, we can't reach this place
4014 * in tunnel mode, so we're left with keep-alive only.
4015 * This mode is currently not implemented, we switch to tunnel mode.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4016 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4017 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4018 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4019 }
4020
4021 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4022 /* if we've just closed an output, let's switch */
4023 if (!(buf->flags & BF_OUT_EMPTY)) {
4024 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4025 goto http_msg_closing;
4026 }
4027 else {
4028 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4029 goto http_msg_closed;
4030 }
4031 }
4032 goto wait_other_side;
4033 }
4034
4035 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4036 http_msg_closing:
4037 /* nothing else to forward, just waiting for the output buffer
4038 * to be empty and for the shutw_now to take effect.
4039 */
4040 if (buf->flags & BF_OUT_EMPTY) {
4041 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4042 goto http_msg_closed;
4043 }
4044 else if (buf->flags & BF_SHUTW) {
4045 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreauae526782010-03-04 20:34:23 +0100[diff] [blame]4046 s->be->counters.cli_aborts++;
4047 if (s->srv)
4048 s->srv->counters.cli_aborts++;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4049 goto wait_other_side;
4050 }
4051 }
4052
4053 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4054 http_msg_closed:
4055 /* drop any pending data */
4056 buffer_ignore(buf, buf->l - buf->send_max);
4057 buffer_auto_close(buf);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4058 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4059 goto wait_other_side;
4060 }
4061
4062 wait_other_side:
4063 http_silent_debug(__LINE__, s);
4064 return txn->rsp.msg_state != old_state || buf->flags != old_flags;
4065}
4066
4067
4068/* Resync the request and response state machines. Return 1 if either state
4069 * changes.
4070 */
4071int http_resync_states(struct session *s)
4072{
4073 struct http_txn *txn = &s->txn;
4074 int old_req_state = txn->req.msg_state;
4075 int old_res_state = txn->rsp.msg_state;
4076
4077 http_silent_debug(__LINE__, s);
4078 http_sync_req_state(s);
4079 while (1) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4080 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4081 if (!http_sync_res_state(s))
4082 break;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4083 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4084 if (!http_sync_req_state(s))
4085 break;
4086 }
4087 http_silent_debug(__LINE__, s);
4088 /* OK, both state machines agree on a compatible state.
4089 * There are a few cases we're interested in :
4090 * - HTTP_MSG_TUNNEL on either means we have to disable both analysers
4091 * - HTTP_MSG_CLOSED on both sides means we've reached the end in both
4092 * directions, so let's simply disable both analysers.
4093 * - HTTP_MSG_CLOSED on the response only means we must abort the
4094 * request.
4095 * - HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE on the response
4096 * with server-close mode means we've completed one request and we
4097 * must re-initialize the server connection.
4098 */
4099
4100 if (txn->req.msg_state == HTTP_MSG_TUNNEL ||
4101 txn->rsp.msg_state == HTTP_MSG_TUNNEL ||
4102 (txn->req.msg_state == HTTP_MSG_CLOSED &&
4103 txn->rsp.msg_state == HTTP_MSG_CLOSED)) {
4104 s->req->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4105 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4106 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4107 s->rep->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4108 buffer_auto_close(s->rep);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4109 buffer_auto_read(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4110 }
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4111 else if (txn->rsp.msg_state == HTTP_MSG_CLOSED ||
4112 txn->rsp.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4113 txn->req.msg_state == HTTP_MSG_ERROR ||
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4114 (s->rep->flags & BF_SHUTW)) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4115 s->rep->analysers = 0;
4116 buffer_auto_close(s->rep);
4117 buffer_auto_read(s->rep);
4118 s->req->analysers = 0;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4119 buffer_abort(s->req);
4120 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4121 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4122 buffer_ignore(s->req, s->req->l - s->req->send_max);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4123 }
4124 else if (txn->req.msg_state == HTTP_MSG_CLOSED &&
4125 txn->rsp.msg_state == HTTP_MSG_DONE &&
4126 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)) {
4127 /* server-close: terminate this server connection and
4128 * reinitialize a fresh-new transaction.
4129 */
4130 http_end_txn_clean_session(s);
4131 }
4132
4133 http_silent_debug(__LINE__, s);
4134 return txn->req.msg_state != old_req_state ||
4135 txn->rsp.msg_state != old_res_state;
4136}
4137
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4138/* This function is an analyser which forwards request body (including chunk
4139 * sizes if any). It is called as soon as we must forward, even if we forward
4140 * zero byte. The only situation where it must not be called is when we're in
4141 * tunnel mode and we want to forward till the close. It's used both to forward
4142 * remaining data and to resync after end of body. It expects the msg_state to
4143 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4144 * read more data, or 1 once we can go on with next request or end the session.
4145 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
4146 * bytes of pending data + the headers if not already done (between som and sov).
4147 * It eventually adjusts som to match sov after the data in between have been sent.
4148 */
4149int http_request_forward_body(struct session *s, struct buffer *req, int an_bit)
4150{
4151 struct http_txn *txn = &s->txn;
4152 struct http_msg *msg = &s->txn.req;
4153
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4154 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4155 return 0;
4156
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4157 if ((req->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
4158 ((req->flags & BF_SHUTW) && (req->to_forward || req->send_max))) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4159 /* Output closed while we were sending data. We must abort and
4160 * wake the other side up.
4161 */
4162 msg->msg_state = HTTP_MSG_ERROR;
4163 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4164 return 1;
4165 }
4166
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4167 /* in most states, we should abort in case of early close */
4168 buffer_auto_close(req);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4169
4170 /* Note that we don't have to send 100-continue back because we don't
4171 * need the data to complete our job, and it's up to the server to
4172 * decide whether to return 100, 417 or anything else in return of
4173 * an "Expect: 100-continue" header.
4174 */
4175
4176 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
4177 /* we have msg->col and msg->sov which both point to the first
4178 * byte of message body. msg->som still points to the beginning
4179 * of the message. We must save the body in req->lr because it
4180 * survives buffer re-alignments.
4181 */
4182 req->lr = req->data + msg->sov;
4183 if (txn->flags & TX_REQ_TE_CHNK)
4184 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4185 else {
4186 msg->msg_state = HTTP_MSG_DATA;
4187 }
4188 }
4189
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4190 while (1) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4191 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4192 /* we may have some data pending */
4193 if (msg->hdr_content_len || msg->som != msg->sov) {
4194 int bytes = msg->sov - msg->som;
4195 if (bytes < 0) /* sov may have wrapped at the end */
4196 bytes += req->size;
4197 buffer_forward(req, bytes + msg->hdr_content_len);
4198 msg->hdr_content_len = 0; /* don't forward that again */
4199 msg->som = msg->sov;
4200 }
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4201
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4202 if (msg->msg_state == HTTP_MSG_DATA) {
4203 /* must still forward */
4204 if (req->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4205 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4206
4207 /* nothing left to forward */
4208 if (txn->flags & TX_REQ_TE_CHNK)
4209 msg->msg_state = HTTP_MSG_DATA_CRLF;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4210 else
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4211 msg->msg_state = HTTP_MSG_DONE;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4212 }
4213 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4214 /* read the chunk size and assign it to ->hdr_content_len, then
4215 * set ->sov and ->lr to point to the body and switch to DATA or
4216 * TRAILERS state.
4217 */
4218 int ret = http_parse_chunk_size(req, msg);
4219
4220 if (!ret)
4221 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4222 else if (ret < 0) {
4223 session_inc_http_err_ctr(s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4224 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4225 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4226 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4227 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4228 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
4229 /* we want the CRLF after the data */
4230 int ret;
4231
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]4232 req->lr = req->w + req->send_max;
4233 if (req->lr >= req->data + req->size)
4234 req->lr -= req->size;
4235
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4236 ret = http_skip_chunk_crlf(req, msg);
4237
4238 if (ret == 0)
4239 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4240 else if (ret < 0) {
4241 session_inc_http_err_ctr(s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4242 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4243 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4244 /* we're in MSG_CHUNK_SIZE now */
4245 }
4246 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
4247 int ret = http_forward_trailers(req, msg);
4248
4249 if (ret == 0)
4250 goto missing_data;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4251 else if (ret < 0) {
4252 session_inc_http_err_ctr(s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4253 goto return_bad_req;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4254 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4255 /* we're in HTTP_MSG_DONE now */
4256 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4257 else {
4258 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]4259 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4260 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
4261 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
4262 buffer_dont_close(req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4263 if (http_resync_states(s)) {
4264 /* some state changes occurred, maybe the analyser
4265 * was disabled too.
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]4266 */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4267 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
4268 goto return_bad_req;
4269 return 1;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4270 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4271
4272 /* If "option abortonclose" is set on the backend, we
4273 * want to monitor the client's connection and forward
4274 * any shutdown notification to the server, which will
4275 * decide whether to close or to go on processing the
4276 * request.
4277 */
4278 if (s->be->options & PR_O_ABRT_CLOSE) {
4279 buffer_auto_read(req);
4280 buffer_auto_close(req);
4281 }
Willy Tarreau58bd8fd2010-09-28 14:16:41 +0200[diff] [blame]4282 else if (s->txn.meth == HTTP_METH_POST) {
4283 /* POST requests may require to read extra CRLF
4284 * sent by broken browsers and which could cause
4285 * an RST to be sent upon close on some systems
4286 * (eg: Linux).
4287 */
4288 buffer_auto_read(req);
4289 }
Willy Tarreau5c54c712010-07-17 08:02:58 +0200[diff] [blame]4290
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4291 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4292 }
4293 }
4294
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4295 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4296 /* stop waiting for data if the input is closed before the end */
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4297 if (req->flags & BF_SHUTR) {
4298 if (!(s->flags & SN_ERR_MASK))
4299 s->flags |= SN_ERR_CLICL;
4300 if (!(s->flags & SN_FINST_MASK))
4301 s->flags |= SN_FINST_D;
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4302 goto return_bad_req;
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4303 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4304
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4305 /* waiting for the last bits to leave the buffer */
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4306 if (req->flags & BF_SHUTW) {
4307 if (!(s->flags & SN_ERR_MASK))
4308 s->flags |= SN_ERR_SRVCL;
4309 if (!(s->flags & SN_FINST_MASK))
4310 s->flags |= SN_FINST_D;
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4311 goto return_bad_req;
Willy Tarreau79ebac62010-06-07 13:47:49 +0200[diff] [blame]4312 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4313
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]4314 /* When TE: chunked is used, we need to get there again to parse remaining
4315 * chunks even if the client has closed, so we don't want to set BF_DONTCLOSE.
4316 */
4317 if (txn->flags & TX_REQ_TE_CHNK)
4318 buffer_dont_close(req);
4319
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4320 http_silent_debug(__LINE__, s);
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4321 return 0;
4322
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4323 return_bad_req: /* let's centralize all bad requests */
4324 txn->req.msg_state = HTTP_MSG_ERROR;
4325 txn->status = 400;
4326 /* Note: we don't send any error if some data were already sent */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]4327 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]4328 req->analysers = 0;
4329 s->fe->counters.failed_req++;
4330 if (s->listener->counters)
4331 s->listener->counters->failed_req++;
4332
4333 if (!(s->flags & SN_ERR_MASK))
4334 s->flags |= SN_ERR_PRXCOND;
4335 if (!(s->flags & SN_FINST_MASK))
4336 s->flags |= SN_FINST_R;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4337 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4338 return 0;
4339}
4340
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4341/* This stream analyser waits for a complete HTTP response. It returns 1 if the
4342 * processing can continue on next analysers, or zero if it either needs more
4343 * data or wants to immediately abort the response (eg: timeout, error, ...). It
4344 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
4345 * when it has nothing left to do, and may remove any analyser when it wants to
4346 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4347 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4348int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4349{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4350 struct http_txn *txn = &s->txn;
4351 struct http_msg *msg = &txn->rsp;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4352 struct hdr_ctx ctx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4353 int use_close_only;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4354 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4355 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]4356
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4357 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]4358 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4359 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4360 rep,
4361 rep->rex, rep->wex,
4362 rep->flags,
4363 rep->l,
4364 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]4365
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4366 /*
4367 * Now parse the partial (or complete) lines.
4368 * We will check the response syntax, and also join multi-line
4369 * headers. An index of all the lines will be elaborated while
4370 * parsing.
4371 *
4372 * For the parsing, we use a 28 states FSM.
4373 *
4374 * Here is the information we currently have :
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4375 * rep->data + msg->som = beginning of response
4376 * rep->data + msg->eoh = end of processed headers / start of current one
4377 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4378 * rep->lr = first non-visited byte
4379 * rep->r = end of data
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4380 * Once we reach MSG_BODY, rep->sol = rep->data + msg->som
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4381 */
4382
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4383 /* There's a protected area at the end of the buffer for rewriting
4384 * purposes. We don't want to start to parse the request if the
4385 * protected area is affected, because we may have to move processed
4386 * data later, which is much more complicated.
4387 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4388 if (rep->l && msg->msg_state < HTTP_MSG_ERROR) {
4389 if (unlikely((rep->flags & BF_FULL) ||
4390 rep->r < rep->lr ||
4391 rep->r > rep->data + rep->size - global.tune.maxrewrite)) {
4392 if (rep->send_max) {
4393 /* some data has still not left the buffer, wake us once that's done */
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4394 if (rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT))
4395 goto abort_response;
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4396 buffer_dont_close(rep);
4397 rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
4398 return 0;
4399 }
4400 if (rep->l <= rep->size - global.tune.maxrewrite)
4401 http_buffer_heavy_realign(rep, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4402 }
4403
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4404 if (likely(rep->lr < rep->r))
4405 http_msg_analyzer(rep, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4406 }
4407
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4408 /* 1: we might have to print this header in debug mode */
4409 if (unlikely((global.mode & MODE_DEBUG) &&
4410 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreauc3bfeeb2010-04-16 09:14:45 +0200[diff] [blame]4411 msg->sol &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4412 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4413 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4414
Willy Tarreau663308b2010-06-07 14:06:08 +0200[diff] [blame]4415 sol = rep->data + msg->som;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]4416 eol = sol + msg->sl.st.l;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4417 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4418
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4419 sol += hdr_idx_first_pos(&txn->hdr_idx);
4420 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4421
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4422 while (cur_idx) {
4423 eol = sol + txn->hdr_idx.v[cur_idx].len;
4424 debug_hdr("srvhdr", s, sol, eol);
4425 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
4426 cur_idx = txn->hdr_idx.v[cur_idx].next;
4427 }
4428 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4429
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4430 /*
4431 * Now we quickly check if we have found a full valid response.
4432 * If not so, we check the FD and buffer states before leaving.
4433 * A full response is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4434 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4435 * responses are checked first.
4436 *
4437 * Depending on whether the client is still there or not, we
4438 * may send an error response back or not. Note that normally
4439 * we should only check for HTTP status there, and check I/O
4440 * errors somewhere else.
4441 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4442
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4443 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4444 /* Invalid response */
4445 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4446 /* we detected a parsing error. We want to archive this response
4447 * in the dedicated proxy area for later troubleshooting.
4448 */
4449 hdr_response_bad:
4450 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
4451 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
4452
4453 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4454 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4455 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4456 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
4457 }
Willy Tarreau64648412010-03-05 10:41:54 +0100[diff] [blame]4458 abort_response:
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4459 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4460 rep->analysers = 0;
4461 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4462 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4463 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4464 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
4465
4466 if (!(s->flags & SN_ERR_MASK))
4467 s->flags |= SN_ERR_PRXCOND;
4468 if (!(s->flags & SN_FINST_MASK))
4469 s->flags |= SN_FINST_H;
4470
4471 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4472 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4473
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4474 /* too large response does not fit in buffer. */
4475 else if (rep->flags & BF_FULL) {
4476 goto hdr_response_bad;
4477 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4478
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4479 /* read error */
4480 else if (rep->flags & BF_READ_ERROR) {
4481 if (msg->err_pos >= 0)
4482 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4483
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4484 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4485 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4486 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4487 health_adjust(s->srv, HANA_STATUS_HTTP_READ_ERROR);
4488 }
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]4489
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4490 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4491 rep->analysers = 0;
4492 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4493 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4494 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4495 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4496
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4497 if (!(s->flags & SN_ERR_MASK))
4498 s->flags |= SN_ERR_SRVCL;
4499 if (!(s->flags & SN_FINST_MASK))
4500 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]4501 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4502 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4503
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4504 /* read timeout : return a 504 to the client. */
4505 else if (rep->flags & BF_READ_TIMEOUT) {
4506 if (msg->err_pos >= 0)
4507 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4508
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4509 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4510 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4511 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4512 health_adjust(s->srv, HANA_STATUS_HTTP_READ_TIMEOUT);
4513 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4514
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4515 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4516 rep->analysers = 0;
4517 txn->status = 504;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4518 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4519 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4520 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4521
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4522 if (!(s->flags & SN_ERR_MASK))
4523 s->flags |= SN_ERR_SRVTO;
4524 if (!(s->flags & SN_FINST_MASK))
4525 s->flags |= SN_FINST_H;
4526 return 0;
4527 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]4528
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4529 /* close from server */
4530 else if (rep->flags & BF_SHUTR) {
4531 if (msg->err_pos >= 0)
4532 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4533
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4534 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4535 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4536 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4537 health_adjust(s->srv, HANA_STATUS_HTTP_BROKEN_PIPE);
4538 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4539
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4540 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4541 rep->analysers = 0;
4542 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4543 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4544 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4545 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4546
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4547 if (!(s->flags & SN_ERR_MASK))
4548 s->flags |= SN_ERR_SRVCL;
4549 if (!(s->flags & SN_FINST_MASK))
4550 s->flags |= SN_FINST_H;
4551 return 0;
4552 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4553
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4554 /* write error to client (we don't send any message then) */
4555 else if (rep->flags & BF_WRITE_ERROR) {
4556 if (msg->err_pos >= 0)
4557 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4558
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4559 s->be->counters.failed_resp++;
4560 rep->analysers = 0;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4561 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4562
4563 if (!(s->flags & SN_ERR_MASK))
4564 s->flags |= SN_ERR_CLICL;
4565 if (!(s->flags & SN_FINST_MASK))
4566 s->flags |= SN_FINST_H;
4567
4568 /* process_session() will take care of the error */
4569 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4570 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4571
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4572 buffer_dont_close(rep);
4573 return 0;
4574 }
4575
4576 /* More interesting part now : we know that we have a complete
4577 * response which at least looks like HTTP. We have an indicator
4578 * of each header's length, so we can parse them quickly.
4579 */
4580
4581 if (unlikely(msg->err_pos >= 0))
4582 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
4583
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4584 /*
4585 * 1: get the status code
4586 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4587 n = msg->sol[msg->sl.st.c] - '0';
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4588 if (n < 1 || n > 5)
4589 n = 0;
Willy Tarreauda7ff642010-06-23 11:44:09 +0200[diff] [blame]4590 /* when the client triggers a 4xx from the server, it's most often due
4591 * to a missing object or permission. These events should be tracked
4592 * because if they happen often, it may indicate a brute force or a
4593 * vulnerability scan.
4594 */
4595 if (n == 4)
4596 session_inc_http_err_ctr(s);
4597
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4598 if (s->srv)
4599 s->srv->counters.p.http.rsp[n]++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4600
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4601 /* check if the response is HTTP/1.1 or above */
4602 if ((msg->sl.st.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4603 ((msg->sol[5] > '1') ||
4604 ((msg->sol[5] == '1') &&
4605 (msg->sol[7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4606 txn->flags |= TX_RES_VER_11;
4607
4608 /* "connection" has not been parsed yet */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4609 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]4610
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4611 /* transfer length unknown*/
4612 txn->flags &= ~TX_RES_XFER_LEN;
4613
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4614 txn->status = strl2ui(msg->sol + msg->sl.st.c, msg->sl.st.c_l);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4615
Willy Tarreau39650402010-03-15 19:44:39 +0100[diff] [blame]4616 /* Adjust server's health based on status code. Note: status codes 501
4617 * and 505 are triggered on demand by client request, so we must not
4618 * count them as server failures.
4619 */
Willy Tarreaud45b3d52010-05-20 11:49:03 +0200[diff] [blame]4620 if (s->srv) {
4621 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
4622 health_adjust(s->srv, HANA_STATUS_HTTP_OK);
4623 else
4624 health_adjust(s->srv, HANA_STATUS_HTTP_STS);
4625 }
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4626
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4627 /*
4628 * 2: check for cacheability.
4629 */
4630
4631 switch (txn->status) {
4632 case 200:
4633 case 203:
4634 case 206:
4635 case 300:
4636 case 301:
4637 case 410:
4638 /* RFC2616 @13.4:
4639 * "A response received with a status code of
4640 * 200, 203, 206, 300, 301 or 410 MAY be stored
4641 * by a cache (...) unless a cache-control
4642 * directive prohibits caching."
4643 *
4644 * RFC2616 @9.5: POST method :
4645 * "Responses to this method are not cacheable,
4646 * unless the response includes appropriate
4647 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4648 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4649 if (likely(txn->meth != HTTP_METH_POST) &&
4650 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
4651 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4652 break;
4653 default:
4654 break;
4655 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4656
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4657 /*
4658 * 3: we may need to capture headers
4659 */
4660 s->logs.logwait &= ~LW_RESP;
4661 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4662 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4663 txn->rsp.cap, s->fe->rsp_cap);
4664
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4665 /* 4: determine the transfer-length.
4666 * According to RFC2616 #4.4, amended by the HTTPbis working group,
4667 * the presence of a message-body in a RESPONSE and its transfer length
4668 * must be determined that way :
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4669 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4670 * All responses to the HEAD request method MUST NOT include a
4671 * message-body, even though the presence of entity-header fields
4672 * might lead one to believe they do. All 1xx (informational), 204
4673 * (No Content), and 304 (Not Modified) responses MUST NOT include a
4674 * message-body. All other responses do include a message-body,
4675 * although it MAY be of zero length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4676 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4677 * 1. Any response which "MUST NOT" include a message-body (such as the
4678 * 1xx, 204 and 304 responses and any response to a HEAD request) is
4679 * always terminated by the first empty line after the header fields,
4680 * regardless of the entity-header fields present in the message.
4681 *
4682 * 2. If a Transfer-Encoding header field (Section 9.7) is present and
4683 * the "chunked" transfer-coding (Section 6.2) is used, the
4684 * transfer-length is defined by the use of this transfer-coding.
4685 * If a Transfer-Encoding header field is present and the "chunked"
4686 * transfer-coding is not present, the transfer-length is defined by
4687 * the sender closing the connection.
4688 *
4689 * 3. If a Content-Length header field is present, its decimal value in
4690 * OCTETs represents both the entity-length and the transfer-length.
4691 * If a message is received with both a Transfer-Encoding header
4692 * field and a Content-Length header field, the latter MUST be ignored.
4693 *
4694 * 4. If the message uses the media type "multipart/byteranges", and
4695 * the transfer-length is not otherwise specified, then this self-
4696 * delimiting media type defines the transfer-length. This media
4697 * type MUST NOT be used unless the sender knows that the recipient
4698 * can parse it; the presence in a request of a Range header with
4699 * multiple byte-range specifiers from a 1.1 client implies that the
4700 * client can parse multipart/byteranges responses.
4701 *
4702 * 5. By the server closing the connection.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4703 */
4704
4705 /* Skip parsing if no content length is possible. The response flags
4706 * 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]4707 * the real header value, and we note that we know the response's length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4708 * FIXME: should we parse anyway and return an error on chunked encoding ?
4709 */
4710 if (txn->meth == HTTP_METH_HEAD ||
4711 (txn->status >= 100 && txn->status < 200) ||
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4712 txn->status == 204 || txn->status == 304) {
4713 txn->flags |= TX_RES_XFER_LEN;
4714 goto skip_content_length;
4715 }
4716
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4717 use_close_only = 0;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4718 ctx.idx = 0;
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]4719 while ((txn->flags & TX_RES_VER_11) &&
4720 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4721 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
4722 txn->flags |= (TX_RES_TE_CHNK | TX_RES_XFER_LEN);
4723 else if (txn->flags & TX_RES_TE_CHNK) {
4724 /* bad transfer-encoding (chunked followed by something else) */
4725 use_close_only = 1;
4726 txn->flags &= ~(TX_RES_TE_CHNK | TX_RES_XFER_LEN);
4727 break;
4728 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4729 }
4730
4731 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
4732 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4733 while (!(txn->flags & TX_RES_TE_CHNK) && !use_close_only &&
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4734 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
4735 signed long long cl;
4736
4737 if (!ctx.vlen)
4738 goto hdr_response_bad;
4739
4740 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
4741 goto hdr_response_bad; /* parse failure */
4742
4743 if (cl < 0)
4744 goto hdr_response_bad;
4745
4746 if ((txn->flags & TX_RES_CNT_LEN) && (msg->hdr_content_len != cl))
4747 goto hdr_response_bad; /* already specified, was different */
4748
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4749 txn->flags |= TX_RES_CNT_LEN | TX_RES_XFER_LEN;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4750 msg->hdr_content_len = cl;
4751 }
4752
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4753 /* FIXME: we should also implement the multipart/byterange method.
4754 * For now on, we resort to close mode in this case (unknown length).
4755 */
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4756skip_content_length:
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4757
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4758 /* end of job, return OK */
4759 rep->analysers &= ~an_bit;
4760 rep->analyse_exp = TICK_ETERNITY;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4761 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4762 return 1;
4763}
4764
4765/* This function performs all the processing enabled for the current response.
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]4766 * It normally returns 1 unless it wants to break. It relies on buffers flags,
4767 * and updates t->rep->analysers. It might make sense to explode it into several
4768 * other functions. It works like process_request (see indications above).
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4769 */
4770int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
4771{
4772 struct http_txn *txn = &t->txn;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4773 struct http_msg *msg = &txn->rsp;
4774 struct proxy *cur_proxy;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]4775 struct cond_wordlist *wl;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4776
4777 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
4778 now_ms, __FUNCTION__,
4779 t,
4780 rep,
4781 rep->rex, rep->wex,
4782 rep->flags,
4783 rep->l,
4784 rep->analysers);
4785
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4786 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4787 return 0;
4788
4789 rep->analysers &= ~an_bit;
4790 rep->analyse_exp = TICK_ETERNITY;
4791
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4792 /* Now we have to check if we need to modify the Connection header.
4793 * This is more difficult on the response than it is on the request,
4794 * because we can have two different HTTP versions and we don't know
4795 * how the client will interprete a response. For instance, let's say
4796 * that the client sends a keep-alive request in HTTP/1.0 and gets an
4797 * HTTP/1.1 response without any header. Maybe it will bound itself to
4798 * HTTP/1.0 because it only knows about it, and will consider the lack
4799 * of header as a close, or maybe it knows HTTP/1.1 and can consider
4800 * the lack of header as a keep-alive. Thus we will use two flags
4801 * indicating how a request MAY be understood by the client. In case
4802 * of multiple possibilities, we'll fix the header to be explicit. If
4803 * ambiguous cases such as both close and keepalive are seen, then we
4804 * will fall back to explicit close. Note that we won't take risks with
4805 * HTTP/1.0 clients which may not necessarily understand keep-alive.
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4806 * See doc/internals/connection-header.txt for the complete matrix.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4807 */
4808
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4809 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
4810 txn->status == 101)) {
4811 /* Either we've established an explicit tunnel, or we're
4812 * switching the protocol. In both cases, we're very unlikely
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4813 * to understand the next protocols. We have to switch to tunnel
4814 * mode, so that we transfer the request and responses then let
4815 * this protocol pass unmodified. When we later implement specific
4816 * parsers for such protocols, we'll want to check the Upgrade
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4817 * header which contains information about that protocol for
4818 * responses with status 101 (eg: see RFC2817 about TLS).
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4819 */
4820 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
4821 }
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4822 else if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) &&
4823 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN ||
4824 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE))) {
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4825 int to_del = 0;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4826
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4827 /* on unknown transfer length, we must close */
4828 if (!(txn->flags & TX_RES_XFER_LEN) &&
4829 (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
4830 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4831
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4832 /* now adjust header transformations depending on current state */
4833 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN ||
4834 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4835 to_del |= 2; /* remove "keep-alive" on any response */
4836 if (!(txn->flags & TX_RES_VER_11))
4837 to_del |= 1; /* remove "close" for HTTP/1.0 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4838 }
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4839 else { /* SCL / KAL */
4840 to_del |= 1; /* remove "close" on any response */
4841 if ((txn->flags & (TX_RES_VER_11|TX_REQ_VER_11)) == (TX_RES_VER_11|TX_REQ_VER_11))
4842 to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4843 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4844
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4845 /* Parse and remove some headers from the connection header */
4846 http_parse_connection_header(txn, msg, rep, to_del);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4847
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4848 /* Some keep-alive responses are converted to Server-close if
4849 * the server wants to close.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4850 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4851 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) {
4852 if ((txn->flags & TX_HDR_CONN_CLO) ||
4853 (txn->flags & (TX_HDR_CONN_KAL|TX_RES_VER_11)) == 0)
4854 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4855 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4856 }
4857
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4858 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4859 /*
4860 * 3: we will have to evaluate the filters.
4861 * As opposed to version 1.2, now they will be evaluated in the
4862 * filters order and not in the header order. This means that
4863 * each filter has to be validated among all headers.
4864 *
4865 * Filters are tried with ->be first, then with ->fe if it is
4866 * different from ->be.
4867 */
4868
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4869 cur_proxy = t->be;
4870 while (1) {
4871 struct proxy *rule_set = cur_proxy;
4872
4873 /* try headers filters */
4874 if (rule_set->rsp_exp != NULL) {
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]4875 if (apply_filters_to_response(t, rep, rule_set) < 0) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4876 return_bad_resp:
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4877 if (t->srv) {
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4878 t->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4879 health_adjust(t->srv, HANA_STATUS_HTTP_RSP);
4880 }
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4881 cur_proxy->counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4882 return_srv_prx_502:
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]4883 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4884 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4885 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4886 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreau8e89b842009-10-18 23:56:35 +0200[diff] [blame]4887 stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4888 if (!(t->flags & SN_ERR_MASK))
4889 t->flags |= SN_ERR_PRXCOND;
4890 if (!(t->flags & SN_FINST_MASK))
4891 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]4892 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4893 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4894 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4895
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4896 /* has the response been denied ? */
4897 if (txn->flags & TX_SVDENY) {
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]4898 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4899 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4900
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4901 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4902 if (t->listener->counters)
4903 t->listener->counters->denied_resp++;
4904
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4905 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]4906 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4907
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4908 /* add response headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]4909 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4910 if (txn->status < 200)
4911 break;
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]4912 if (wl->cond) {
4913 int ret = acl_exec_cond(wl->cond, px, t, txn, ACL_DIR_RTR);
4914 ret = acl_pass(ret);
4915 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
4916 ret = !ret;
4917 if (!ret)
4918 continue;
4919 }
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]4920 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]4921 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]4922 }
4923
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4924 /* check whether we're already working on the frontend */
4925 if (cur_proxy == t->fe)
4926 break;
4927 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4928 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4929
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4930 /*
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4931 * We may be facing a 100-continue response, in which case this
4932 * is not the right response, and we're waiting for the next one.
4933 * Let's allow this response to go to the client and wait for the
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4934 * next one.
4935 */
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4936 if (unlikely(txn->status == 100)) {
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4937 hdr_idx_init(&txn->hdr_idx);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4938 buffer_forward(rep, rep->lr - msg->sol);
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4939 msg->msg_state = HTTP_MSG_RPBEFORE;
4940 txn->status = 0;
4941 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
4942 return 1;
4943 }
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4944 else if (unlikely(txn->status < 200))
4945 goto skip_header_mangling;
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4946
4947 /* we don't have any 1xx status code now */
4948
4949 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4950 * 4: check for server cookie.
4951 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4952 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name ||
4953 (t->be->options & PR_O_CHK_CACHE))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4954 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4955
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4956
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4957 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4958 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4959 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4960 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4961 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4962
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4963 /*
4964 * 6: add server cookie in the response if needed
4965 */
4966 if ((t->srv) && !(t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_INS) &&
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]4967 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) &&
4968 !(t->flags & SN_IGNORE_PRST)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4969 int len;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4970
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4971 /* the server is known, it's not the one the client requested, we have to
4972 * insert a set-cookie here, except if we want to insert only on POST
4973 * requests and this one isn't. Note that servers which don't have cookies
4974 * (eg: some backup servers) will return a full cookie removal request.
4975 */
4976 len = sprintf(trash, "Set-Cookie: %s=%s; path=/",
4977 t->be->cookie_name,
4978 t->srv->cookie ? t->srv->cookie : "; Expires=Thu, 01-Jan-1970 00:00:01 GMT");
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4979
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4980 if (t->be->cookie_domain)
4981 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4982
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4983 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4984 trash, len) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4985 goto return_bad_resp;
4986 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4987
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4988 /* Here, we will tell an eventual cache on the client side that we don't
4989 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
4990 * Some caches understand the correct form: 'no-cache="set-cookie"', but
4991 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
4992 */
4993 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4994
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4995 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4996
4997 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4998 "Cache-control: private", 22) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4999 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5000 }
5001 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5002
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5003 /*
5004 * 7: check if result will be cacheable with a cookie.
5005 * We'll block the response if security checks have caught
5006 * nasty things such as a cacheable cookie.
5007 */
5008 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) ==
5009 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]5010 (t->be->options & PR_O_CHK_CACHE)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5011
5012 /* we're in presence of a cacheable response containing
5013 * a set-cookie header. We'll block it as requested by
5014 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5015 */
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]5016 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5017 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5018
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5019 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5020 if (t->listener->counters)
5021 t->listener->counters->denied_resp++;
5022
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5023 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
5024 t->be->id, t->srv?t->srv->id:"<dispatch>");
5025 send_log(t->be, LOG_ALERT,
5026 "Blocking cacheable cookie in response from instance %s, server %s.\n",
5027 t->be->id, t->srv?t->srv->id:"<dispatch>");
5028 goto return_srv_prx_502;
5029 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5030
5031 /*
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5032 * 8: adjust "Connection: close" or "Connection: keep-alive" if needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5033 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]5034 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
5035 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE)) {
5036 unsigned int want_flags = 0;
5037
5038 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5039 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
5040 /* we want a keep-alive response here. Keep-alive header
5041 * required if either side is not 1.1.
5042 */
5043 if ((txn->flags & (TX_REQ_VER_11|TX_RES_VER_11)) != (TX_REQ_VER_11|TX_RES_VER_11))
5044 want_flags |= TX_CON_KAL_SET;
5045 }
5046 else {
5047 /* we want a close response here. Close header required if
5048 * the server is 1.1, regardless of the client.
5049 */
5050 if (txn->flags & TX_RES_VER_11)
5051 want_flags |= TX_CON_CLO_SET;
5052 }
5053
5054 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
5055 http_change_connection_header(txn, msg, rep, want_flags);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5056 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5057
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]5058 skip_header_mangling:
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]5059 if ((txn->flags & TX_RES_XFER_LEN) ||
5060 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5061 rep->analysers |= AN_RES_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]5062
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5063 /*************************************************************
5064 * OK, that's finished for the headers. We have done what we *
5065 * could. Let's switch to the DATA state. *
5066 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5067
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5068 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5069
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5070 /* if the user wants to log as soon as possible, without counting
5071 * bytes from the server, then this is the right moment. We have
5072 * to temporarily assign bytes_out to log what we currently have.
5073 */
5074 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
5075 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
5076 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]5077 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5078 t->logs.bytes_out = 0;
5079 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5080
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5081 /* Note: we must not try to cheat by jumping directly to DATA,
5082 * otherwise we would not let the client side wake up.
5083 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5084
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5085 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5086 }
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]5087 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]5088}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5089
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5090/* This function is an analyser which forwards response body (including chunk
5091 * sizes if any). It is called as soon as we must forward, even if we forward
5092 * zero byte. The only situation where it must not be called is when we're in
5093 * tunnel mode and we want to forward till the close. It's used both to forward
5094 * remaining data and to resync after end of body. It expects the msg_state to
5095 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
5096 * read more data, or 1 once we can go on with next request or end the session.
5097 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
5098 * bytes of pending data + the headers if not already done (between som and sov).
5099 * It eventually adjusts som to match sov after the data in between have been sent.
5100 */
5101int http_response_forward_body(struct session *s, struct buffer *res, int an_bit)
5102{
5103 struct http_txn *txn = &s->txn;
5104 struct http_msg *msg = &s->txn.rsp;
5105
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5106 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
5107 return 0;
5108
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5109 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]5110 ((res->flags & BF_SHUTW) && (res->to_forward || res->send_max)) ||
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]5111 !s->req->analysers) {
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5112 /* Output closed while we were sending data. We must abort and
5113 * wake the other side up.
5114 */
5115 msg->msg_state = HTTP_MSG_ERROR;
5116 http_resync_states(s);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]5117 return 1;
5118 }
5119
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5120 /* in most states, we should abort in case of early close */
5121 buffer_auto_close(res);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]5122
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5123 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
5124 /* we have msg->col and msg->sov which both point to the first
5125 * byte of message body. msg->som still points to the beginning
5126 * of the message. We must save the body in req->lr because it
5127 * survives buffer re-alignments.
5128 */
5129 res->lr = res->data + msg->sov;
5130 if (txn->flags & TX_RES_TE_CHNK)
5131 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
5132 else {
5133 msg->msg_state = HTTP_MSG_DATA;
5134 }
5135 }
5136
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5137 while (1) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5138 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]5139 /* we may have some data pending */
5140 if (msg->hdr_content_len || msg->som != msg->sov) {
5141 int bytes = msg->sov - msg->som;
5142 if (bytes < 0) /* sov may have wrapped at the end */
5143 bytes += res->size;
5144 buffer_forward(res, bytes + msg->hdr_content_len);
5145 msg->hdr_content_len = 0; /* don't forward that again */
5146 msg->som = msg->sov;
5147 }
5148
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5149 if (msg->msg_state == HTTP_MSG_DATA) {
5150 /* must still forward */
5151 if (res->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5152 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5153
5154 /* nothing left to forward */
5155 if (txn->flags & TX_RES_TE_CHNK)
5156 msg->msg_state = HTTP_MSG_DATA_CRLF;
5157 else
5158 msg->msg_state = HTTP_MSG_DONE;
5159 }
5160 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5161 /* read the chunk size and assign it to ->hdr_content_len, then
5162 * set ->sov to point to the body and switch to DATA or TRAILERS state.
5163 */
5164 int ret = http_parse_chunk_size(res, msg);
5165
5166 if (!ret)
5167 goto missing_data;
5168 else if (ret < 0)
5169 goto return_bad_res;
5170 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5171 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5172 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
5173 /* we want the CRLF after the data */
5174 int ret;
5175
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]5176 res->lr = res->w + res->send_max;
5177 if (res->lr >= res->data + res->size)
5178 res->lr -= res->size;
5179
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5180 ret = http_skip_chunk_crlf(res, msg);
5181
5182 if (!ret)
5183 goto missing_data;
5184 else if (ret < 0)
5185 goto return_bad_res;
5186 /* we're in MSG_CHUNK_SIZE now */
5187 }
5188 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
5189 int ret = http_forward_trailers(res, msg);
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5190
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5191 if (ret == 0)
5192 goto missing_data;
5193 else if (ret < 0)
5194 goto return_bad_res;
5195 /* we're in HTTP_MSG_DONE now */
5196 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5197 else {
5198 /* other states, DONE...TUNNEL */
Willy Tarreau4fe41902010-06-07 22:27:41 +0200[diff] [blame]5199 /* for keep-alive we don't want to forward closes on DONE */
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5200 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5201 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5202 buffer_dont_close(res);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5203 if (http_resync_states(s)) {
5204 http_silent_debug(__LINE__, s);
5205 /* some state changes occurred, maybe the analyser
5206 * was disabled too.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5207 */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5208 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
5209 goto return_bad_res;
5210 return 1;
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5211 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5212 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5213 }
5214 }
5215
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5216 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5217 /* stop waiting for data if the input is closed before the end */
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5218 if (res->flags & BF_SHUTR) {
5219 if (!(s->flags & SN_ERR_MASK))
5220 s->flags |= SN_ERR_SRVCL;
Willy Tarreauae526782010-03-04 20:34:23 +0100[diff] [blame]5221 s->be->counters.srv_aborts++;
5222 if (s->srv)
5223 s->srv->counters.srv_aborts++;
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5224 goto return_bad_res;
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5225 }
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5226
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5227 /* we need to obey the req analyser, so if it leaves, we must too */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5228 if (!s->req->analysers)
5229 goto return_bad_res;
5230
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5231 /* forward the chunk size as well as any pending data */
5232 if (msg->hdr_content_len || msg->som != msg->sov) {
5233 buffer_forward(res, msg->sov - msg->som + msg->hdr_content_len);
5234 msg->hdr_content_len = 0; /* don't forward that again */
5235 msg->som = msg->sov;
5236 }
5237
Willy Tarreau92aa1fa2010-08-28 18:57:20 +0200[diff] [blame]5238 /* When TE: chunked is used, we need to get there again to parse remaining
5239 * chunks even if the server has closed, so we don't want to set BF_DONTCLOSE.
5240 * Similarly, with keep-alive on the client side, we don't want to forward a
5241 * close.
5242 */
5243 if ((txn->flags & TX_RES_TE_CHNK) ||
5244 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
5245 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
5246 buffer_dont_close(res);
5247
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5248 /* the session handler will take care of timeouts and errors */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5249 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5250 return 0;
5251
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5252 return_bad_res: /* let's centralize all bad responses */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5253 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]5254 /* don't send any error message as we're in the body */
5255 stream_int_retnclose(res->cons, NULL);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5256 res->analysers = 0;
5257 s->be->counters.failed_resp++;
5258 if (s->srv) {
5259 s->srv->counters.failed_resp++;
5260 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
5261 }
5262
5263 if (!(s->flags & SN_ERR_MASK))
5264 s->flags |= SN_ERR_PRXCOND;
5265 if (!(s->flags & SN_FINST_MASK))
Willy Tarreau40dba092010-03-04 18:14:51 +0100[diff] [blame]5266 s->flags |= SN_FINST_D;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5267 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5268 return 0;
5269}
5270
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5271/* Iterate the same filter through all request headers.
5272 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5273 * Since it can manage the switch to another backend, it updates the per-proxy
5274 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5275 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5276int 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]5277{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5278 char term;
5279 char *cur_ptr, *cur_end, *cur_next;
5280 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5281 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5282 struct hdr_idx_elem *cur_hdr;
5283 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]5284
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5285 last_hdr = 0;
5286
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5287 cur_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5288 old_idx = 0;
5289
5290 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5291 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5292 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5293 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5294 (exp->action == ACT_ALLOW ||
5295 exp->action == ACT_DENY ||
5296 exp->action == ACT_TARPIT))
5297 return 0;
5298
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5299 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5300 if (!cur_idx)
5301 break;
5302
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5303 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5304 cur_ptr = cur_next;
5305 cur_end = cur_ptr + cur_hdr->len;
5306 cur_next = cur_end + cur_hdr->cr + 1;
5307
5308 /* Now we have one header between cur_ptr and cur_end,
5309 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5310 */
5311
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5312 /* The annoying part is that pattern matching needs
5313 * that we modify the contents to null-terminate all
5314 * strings before testing them.
5315 */
5316
5317 term = *cur_end;
5318 *cur_end = '\0';
5319
5320 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5321 switch (exp->action) {
5322 case ACT_SETBE:
5323 /* It is not possible to jump a second time.
5324 * FIXME: should we return an HTTP/500 here so that
5325 * the admin knows there's a problem ?
5326 */
5327 if (t->be != t->fe)
5328 break;
5329
5330 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5331 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5332 last_hdr = 1;
5333 break;
5334
5335 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5336 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5337 last_hdr = 1;
5338 break;
5339
5340 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5341 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5342 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5343
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5344 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5345 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5346 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5347
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5348 break;
5349
5350 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5351 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5352 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5353
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5354 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5355 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5356 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5357
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5358 break;
5359
5360 case ACT_REPLACE:
5361 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5362 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5363 /* FIXME: if the user adds a newline in the replacement, the
5364 * index will not be recalculated for now, and the new line
5365 * will not be counted as a new header.
5366 */
5367
5368 cur_end += delta;
5369 cur_next += delta;
5370 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5371 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5372 break;
5373
5374 case ACT_REMOVE:
5375 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
5376 cur_next += delta;
5377
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5378 http_msg_move_end(&txn->req, delta);
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5379 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5380 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5381 cur_hdr->len = 0;
5382 cur_end = NULL; /* null-term has been rewritten */
5383 break;
5384
5385 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5386 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5387 if (cur_end)
5388 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5389
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5390 /* keep the link from this header to next one in case of later
5391 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5392 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5393 old_idx = cur_idx;
5394 }
5395 return 0;
5396}
5397
5398
5399/* Apply the filter to the request line.
5400 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5401 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5402 * Since it can manage the switch to another backend, it updates the per-proxy
5403 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5404 */
5405int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
5406{
5407 char term;
5408 char *cur_ptr, *cur_end;
5409 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5410 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5411 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5412
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5413
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5414 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5415 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5416 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5417 (exp->action == ACT_ALLOW ||
5418 exp->action == ACT_DENY ||
5419 exp->action == ACT_TARPIT))
5420 return 0;
5421 else if (exp->action == ACT_REMOVE)
5422 return 0;
5423
5424 done = 0;
5425
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5426 cur_ptr = txn->req.sol;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5427 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5428
5429 /* Now we have the request line between cur_ptr and cur_end */
5430
5431 /* The annoying part is that pattern matching needs
5432 * that we modify the contents to null-terminate all
5433 * strings before testing them.
5434 */
5435
5436 term = *cur_end;
5437 *cur_end = '\0';
5438
5439 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5440 switch (exp->action) {
5441 case ACT_SETBE:
5442 /* It is not possible to jump a second time.
5443 * FIXME: should we return an HTTP/500 here so that
5444 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5445 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5446 if (t->be != t->fe)
5447 break;
5448
5449 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5450 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5451 done = 1;
5452 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5453
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5454 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5455 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5456 done = 1;
5457 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5458
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5459 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5460 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5461
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5462 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5463 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5464 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5465
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5466 done = 1;
5467 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5468
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5469 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5470 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5471
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5472 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5473 if (t->listener->counters)
Willy Tarreaubb695392010-06-23 08:43:37 +0200[diff] [blame]5474 t->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5475
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5476 done = 1;
5477 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5478
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5479 case ACT_REPLACE:
5480 *cur_end = term; /* restore the string terminator */
5481 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5482 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5483 /* FIXME: if the user adds a newline in the replacement, the
5484 * index will not be recalculated for now, and the new line
5485 * will not be counted as a new header.
5486 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5487
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5488 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5489 cur_end += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5490 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5491 HTTP_MSG_RQMETH,
5492 cur_ptr, cur_end + 1,
5493 NULL, NULL);
5494 if (unlikely(!cur_end))
5495 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5496
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5497 /* we have a full request and we know that we have either a CR
5498 * or an LF at <ptr>.
5499 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5500 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
5501 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]5502 /* there is no point trying this regex on headers */
5503 return 1;
5504 }
5505 }
5506 *cur_end = term; /* restore the string terminator */
5507 return done;
5508}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]5509
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5510
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5511
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5512/*
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5513 * 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]5514 * 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]5515 * unparsable request. Since it can manage the switch to another backend, it
5516 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5517 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5518int apply_filters_to_request(struct session *s, struct buffer *req, struct proxy *px)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5519{
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5520 struct http_txn *txn = &s->txn;
5521 struct hdr_exp *exp;
5522
5523 for (exp = px->req_exp; exp; exp = exp->next) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5524 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5525
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5526 /*
5527 * The interleaving of transformations and verdicts
5528 * makes it difficult to decide to continue or stop
5529 * the evaluation.
5530 */
5531
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5532 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
5533 break;
5534
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5535 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5536 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5537 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5538 continue;
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5539
5540 /* if this filter had a condition, evaluate it now and skip to
5541 * next filter if the condition does not match.
5542 */
5543 if (exp->cond) {
5544 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_REQ);
5545 ret = acl_pass(ret);
5546 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
5547 ret = !ret;
5548
5549 if (!ret)
5550 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5551 }
5552
5553 /* Apply the filter to the request line. */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5554 ret = apply_filter_to_req_line(s, req, exp);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5555 if (unlikely(ret < 0))
5556 return -1;
5557
5558 if (likely(ret == 0)) {
5559 /* The filter did not match the request, it can be
5560 * iterated through all headers.
5561 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5562 apply_filter_to_req_headers(s, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5563 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5564 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5565 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5566}
5567
5568
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5569
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5570/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5571 * Try to retrieve the server associated to the appsession.
5572 * If the server is found, it's assigned to the session.
5573 */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5574void manage_client_side_appsession(struct session *t, const char *buf, int len) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5575 struct http_txn *txn = &t->txn;
5576 appsess *asession = NULL;
5577 char *sessid_temp = NULL;
5578
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5579 if (len > t->be->appsession_len) {
5580 len = t->be->appsession_len;
5581 }
5582
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5583 if (t->be->options2 & PR_O2_AS_REQL) {
5584 /* request-learn option is enabled : store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5585 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5586 /* 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]5587 pool_free2(apools.sessid, txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5588 }
5589
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5590 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5591 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5592 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5593 return;
5594 }
5595
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5596 memcpy(txn->sessid, buf, len);
5597 txn->sessid[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5598 }
5599
5600 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
5601 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5602 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5603 return;
5604 }
5605
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5606 memcpy(sessid_temp, buf, len);
5607 sessid_temp[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5608
5609 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
5610 /* free previously allocated memory */
5611 pool_free2(apools.sessid, sessid_temp);
5612
5613 if (asession != NULL) {
5614 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
5615 if (!(t->be->options2 & PR_O2_AS_REQL))
5616 asession->request_count++;
5617
5618 if (asession->serverid != NULL) {
5619 struct server *srv = t->be->srv;
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]5620
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5621 while (srv) {
5622 if (strcmp(srv->id, asession->serverid) == 0) {
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]5623 if ((srv->state & SRV_RUNNING) ||
5624 (t->be->options & PR_O_PERSIST) ||
5625 (t->flags & SN_FORCE_PRST)) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5626 /* we found the server and it's usable */
5627 txn->flags &= ~TX_CK_MASK;
Willy Tarreau2a6d88d2010-01-24 13:10:43 +0100[diff] [blame]5628 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5629 t->flags |= SN_DIRECT | SN_ASSIGNED;
5630 t->srv = srv;
5631 break;
5632 } else {
5633 txn->flags &= ~TX_CK_MASK;
5634 txn->flags |= TX_CK_DOWN;
5635 }
5636 }
5637 srv = srv->next;
5638 }
5639 }
5640 }
5641}
5642
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5643/* Find the end of a cookie value contained between <s> and <e>. It works the
5644 * same way as with headers above except that the semi-colon also ends a token.
5645 * See RFC2965 for more information. Note that it requires a valid header to
5646 * return a valid result.
5647 */
5648char *find_cookie_value_end(char *s, const char *e)
5649{
5650 int quoted, qdpair;
5651
5652 quoted = qdpair = 0;
5653 for (; s < e; s++) {
5654 if (qdpair) qdpair = 0;
5655 else if (quoted) {
5656 if (*s == '\\') qdpair = 1;
5657 else if (*s == '"') quoted = 0;
5658 }
5659 else if (*s == '"') quoted = 1;
5660 else if (*s == ',' || *s == ';') return s;
5661 }
5662 return s;
5663}
5664
5665/* Delete a value in a header between delimiters <from> and <next> in buffer
5666 * <buf>. The number of characters displaced is returned, and the pointer to
5667 * the first delimiter is updated if required. The function tries as much as
5668 * possible to respect the following principles :
5669 * - replace <from> delimiter by the <next> one unless <from> points to a
5670 * colon, in which case <next> is simply removed
5671 * - set exactly one space character after the new first delimiter, unless
5672 * there are not enough characters in the block being moved to do so.
5673 * - remove unneeded spaces before the previous delimiter and after the new
5674 * one.
5675 *
5676 * It is the caller's responsibility to ensure that :
5677 * - <from> points to a valid delimiter or the colon ;
5678 * - <next> points to a valid delimiter or the final CR/LF ;
5679 * - there are non-space chars before <from> ;
5680 * - there is a CR/LF at or after <next>.
5681 */
5682int del_hdr_value(struct buffer *buf, char **from, char *next)
5683{
5684 char *prev = *from;
5685
5686 if (*prev == ':') {
5687 /* We're removing the first value, preserve the colon and add a
5688 * space if possible.
5689 */
5690 if (!http_is_crlf[(unsigned char)*next])
5691 next++;
5692 prev++;
5693 if (prev < next)
5694 *prev++ = ' ';
5695
5696 while (http_is_spht[(unsigned char)*next])
5697 next++;
5698 } else {
5699 /* Remove useless spaces before the old delimiter. */
5700 while (http_is_spht[(unsigned char)*(prev-1)])
5701 prev--;
5702 *from = prev;
5703
5704 /* copy the delimiter and if possible a space if we're
5705 * not at the end of the line.
5706 */
5707 if (!http_is_crlf[(unsigned char)*next]) {
5708 *prev++ = *next++;
5709 if (prev + 1 < next)
5710 *prev++ = ' ';
5711 while (http_is_spht[(unsigned char)*next])
5712 next++;
5713 }
5714 }
5715 return buffer_replace2(buf, prev, next, NULL, 0);
5716}
5717
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5718/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]5719 * Manage client-side cookie. It can impact performance by about 2% so it is
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5720 * desirable to call it only when needed. This code is quite complex because
5721 * of the multiple very crappy and ambiguous syntaxes we have to support. it
5722 * highly recommended not to touch this part without a good reason !
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5723 */
5724void manage_client_side_cookies(struct session *t, struct buffer *req)
5725{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5726 struct http_txn *txn = &t->txn;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5727 int preserve_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5728 int cur_idx, old_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5729 char *hdr_beg, *hdr_end, *hdr_next, *del_from;
5730 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5731
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5732 /* Iterate through the headers, we start with the start line. */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]5733 old_idx = 0;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5734 hdr_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5735
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5736 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5737 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5738 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5739
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5740 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5741 hdr_beg = hdr_next;
5742 hdr_end = hdr_beg + cur_hdr->len;
5743 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5744
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5745 /* We have one full header between hdr_beg and hdr_end, and the
5746 * next header starts at hdr_next. We're only interested in
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5747 * "Cookie:" headers.
5748 */
5749
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5750 val = http_header_match2(hdr_beg, hdr_end, "Cookie", 6);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5751 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5752 old_idx = cur_idx;
5753 continue;
5754 }
5755
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5756 del_from = NULL; /* nothing to be deleted */
5757 preserve_hdr = 0; /* assume we may kill the whole header */
5758
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5759 /* Now look for cookies. Conforming to RFC2109, we have to support
5760 * attributes whose name begin with a '$', and associate them with
5761 * the right cookie, if we want to delete this cookie.
5762 * So there are 3 cases for each cookie read :
5763 * 1) it's a special attribute, beginning with a '$' : ignore it.
5764 * 2) it's a server id cookie that we *MAY* want to delete : save
5765 * some pointers on it (last semi-colon, beginning of cookie...)
5766 * 3) it's an application cookie : we *MAY* have to delete a previous
5767 * "special" cookie.
5768 * At the end of loop, if a "special" cookie remains, we may have to
5769 * remove it. If no application cookie persists in the header, we
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5770 * *MUST* delete it.
5771 *
5772 * Note: RFC2965 is unclear about the processing of spaces around
5773 * the equal sign in the ATTR=VALUE form. A careful inspection of
5774 * the RFC explicitly allows spaces before it, and not within the
5775 * tokens (attrs or values). An inspection of RFC2109 allows that
5776 * too but section 10.1.3 lets one think that spaces may be allowed
5777 * after the equal sign too, resulting in some (rare) buggy
5778 * implementations trying to do that. So let's do what servers do.
5779 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
5780 * allowed quoted strings in values, with any possible character
5781 * after a backslash, including control chars and delimitors, which
5782 * causes parsing to become ambiguous. Browsers also allow spaces
5783 * within values even without quotes.
5784 *
5785 * We have to keep multiple pointers in order to support cookie
5786 * removal at the beginning, middle or end of header without
5787 * corrupting the header. All of these headers are valid :
5788 *
5789 * Cookie:NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3\r\n
5790 * Cookie:NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3\r\n
5791 * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
5792 * | | | | | | | | |
5793 * | | | | | | | | hdr_end <--+
5794 * | | | | | | | +--> next
5795 * | | | | | | +----> val_end
5796 * | | | | | +-----------> val_beg
5797 * | | | | +--------------> equal
5798 * | | | +----------------> att_end
5799 * | | +---------------------> att_beg
5800 * | +--------------------------> prev
5801 * +--------------------------------> hdr_beg
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5802 */
5803
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5804 for (prev = hdr_beg + 6; prev < hdr_end; prev = next) {
5805 /* Iterate through all cookies on this line */
5806
5807 /* find att_beg */
5808 att_beg = prev + 1;
5809 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
5810 att_beg++;
5811
5812 /* find att_end : this is the first character after the last non
5813 * space before the equal. It may be equal to hdr_end.
5814 */
5815 equal = att_end = att_beg;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5816
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5817 while (equal < hdr_end) {
5818 if (*equal == '=' || *equal == ',' || *equal == ';')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5819 break;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5820 if (http_is_spht[(unsigned char)*equal++])
5821 continue;
5822 att_end = equal;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5823 }
5824
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5825 /* here, <equal> points to '=', a delimitor or the end. <att_end>
5826 * is between <att_beg> and <equal>, both may be identical.
5827 */
5828
5829 /* look for end of cookie if there is an equal sign */
5830 if (equal < hdr_end && *equal == '=') {
5831 /* look for the beginning of the value */
5832 val_beg = equal + 1;
5833 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
5834 val_beg++;
5835
5836 /* find the end of the value, respecting quotes */
5837 next = find_cookie_value_end(val_beg, hdr_end);
5838
5839 /* make val_end point to the first white space or delimitor after the value */
5840 val_end = next;
5841 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
5842 val_end--;
5843 } else {
5844 val_beg = val_end = next = equal;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5845 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5846
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5847 /* We have nothing to do with attributes beginning with '$'. However,
5848 * they will automatically be removed if a header before them is removed,
5849 * since they're supposed to be linked together.
5850 */
5851 if (*att_beg == '$')
5852 continue;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5853
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5854 /* Ignore cookies with no equal sign */
5855 if (equal == next) {
5856 /* This is not our cookie, so we must preserve it. But if we already
5857 * scheduled another cookie for removal, we cannot remove the
5858 * complete header, but we can remove the previous block itself.
5859 */
5860 preserve_hdr = 1;
5861 if (del_from != NULL) {
5862 int delta = del_hdr_value(req, &del_from, prev);
5863 val_end += delta;
5864 next += delta;
5865 hdr_end += delta;
5866 hdr_next += delta;
5867 cur_hdr->len += delta;
5868 http_msg_move_end(&txn->req, delta);
5869 prev = del_from;
5870 del_from = NULL;
5871 }
5872 continue;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5873 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5874
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5875 /* if there are spaces around the equal sign, we need to
5876 * strip them otherwise we'll get trouble for cookie captures,
5877 * or even for rewrites. Since this happens extremely rarely,
5878 * it does not hurt performance.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5879 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5880 if (unlikely(att_end != equal || val_beg > equal + 1)) {
5881 int stripped_before = 0;
5882 int stripped_after = 0;
5883
5884 if (att_end != equal) {
5885 stripped_before = buffer_replace2(req, att_end, equal, NULL, 0);
5886 equal += stripped_before;
5887 val_beg += stripped_before;
5888 }
5889
5890 if (val_beg > equal + 1) {
5891 stripped_after = buffer_replace2(req, equal + 1, val_beg, NULL, 0);
5892 val_beg += stripped_after;
5893 stripped_before += stripped_after;
5894 }
5895
5896 val_end += stripped_before;
5897 next += stripped_before;
5898 hdr_end += stripped_before;
5899 hdr_next += stripped_before;
5900 cur_hdr->len += stripped_before;
5901 http_msg_move_end(&txn->req, stripped_before);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5902 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5903 /* now everything is as on the diagram above */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5904
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5905 /* First, let's see if we want to capture this cookie. We check
5906 * that we don't already have a client side cookie, because we
5907 * can only capture one. Also as an optimisation, we ignore
5908 * cookies shorter than the declared name.
5909 */
5910 if (t->fe->capture_name != NULL && txn->cli_cookie == NULL &&
5911 (val_end - att_beg >= t->fe->capture_namelen) &&
5912 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
5913 int log_len = val_end - att_beg;
5914
5915 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
5916 Alert("HTTP logging : out of memory.\n");
5917 } else {
5918 if (log_len > t->fe->capture_len)
5919 log_len = t->fe->capture_len;
5920 memcpy(txn->cli_cookie, att_beg, log_len);
5921 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5922 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5923 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5924
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5925 /* For cookies in prefix mode. The form is :
5926 *
5927 * Cookie: NAME=SRV~VALUE
5928 *
5929 */
5930 if ((att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
5931 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
5932 struct server *srv = t->be->srv;
5933 char *delim;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5934
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5935 /* if we're in cookie prefix mode, we'll search the delimitor so that we
5936 * have the server ID between val_beg and delim, and the original cookie between
5937 * delim+1 and val_end. Otherwise, delim==val_end :
5938 *
5939 * Cookie: NAME=SRV; # in all but prefix modes
5940 * Cookie: NAME=SRV~OPAQUE ; # in prefix mode
5941 * | || || | |+-> next
5942 * | || || | +--> val_end
5943 * | || || +---------> delim
5944 * | || |+------------> val_beg
5945 * | || +-------------> att_end = equal
5946 * | |+-----------------> att_beg
5947 * | +------------------> prev
5948 * +-------------------------> hdr_beg
5949 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5950
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5951 if (t->be->options & PR_O_COOK_PFX) {
5952 for (delim = val_beg; delim < val_end; delim++)
5953 if (*delim == COOKIE_DELIM)
5954 break;
5955 }
5956 else
5957 delim = val_end;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5958
5959
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5960 /* Here, we'll look for the first running server which supports the cookie.
5961 * This allows to share a same cookie between several servers, for example
5962 * to dedicate backup servers to specific servers only.
5963 * However, to prevent clients from sticking to cookie-less backup server
5964 * when they have incidentely learned an empty cookie, we simply ignore
5965 * empty cookies and mark them as invalid.
5966 * The same behaviour is applied when persistence must be ignored.
5967 */
5968 if ((delim == val_beg) || (t->flags & SN_IGNORE_PRST))
5969 srv = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5970
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5971 while (srv) {
5972 if (srv->cookie && (srv->cklen == delim - val_beg) &&
5973 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
5974 if ((srv->state & SRV_RUNNING) ||
5975 (t->be->options & PR_O_PERSIST) ||
5976 (t->flags & SN_FORCE_PRST)) {
5977 /* we found the server and we can use it */
5978 txn->flags &= ~TX_CK_MASK;
5979 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
5980 t->flags |= SN_DIRECT | SN_ASSIGNED;
5981 t->srv = srv;
5982 break;
5983 } else {
5984 /* we found a server, but it's down,
5985 * mark it as such and go on in case
5986 * another one is available.
5987 */
5988 txn->flags &= ~TX_CK_MASK;
5989 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5990 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5991 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5992 srv = srv->next;
5993 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5994
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]5995 if (!srv && !(txn->flags & TX_CK_DOWN)) {
5996 /* no server matched this cookie */
5997 txn->flags &= ~TX_CK_MASK;
5998 txn->flags |= TX_CK_INVALID;
5999 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6000
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6001 /* depending on the cookie mode, we may have to either :
6002 * - delete the complete cookie if we're in insert+indirect mode, so that
6003 * the server never sees it ;
6004 * - remove the server id from the cookie value, and tag the cookie as an
6005 * application cookie so that it does not get accidentely removed later,
6006 * if we're in cookie prefix mode
6007 */
6008 if ((t->be->options & PR_O_COOK_PFX) && (delim != val_end)) {
6009 int delta; /* negative */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6010
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6011 delta = buffer_replace2(req, val_beg, delim + 1, NULL, 0);
6012 val_end += delta;
6013 next += delta;
6014 hdr_end += delta;
6015 hdr_next += delta;
6016 cur_hdr->len += delta;
6017 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6018
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6019 del_from = NULL;
6020 preserve_hdr = 1; /* we want to keep this cookie */
6021 }
6022 else if (del_from == NULL &&
6023 (t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) {
6024 del_from = prev;
6025 }
6026 } else {
6027 /* This is not our cookie, so we must preserve it. But if we already
6028 * scheduled another cookie for removal, we cannot remove the
6029 * complete header, but we can remove the previous block itself.
6030 */
6031 preserve_hdr = 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6032
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6033 if (del_from != NULL) {
6034 int delta = del_hdr_value(req, &del_from, prev);
6035 val_end += delta;
6036 next += delta;
6037 hdr_end += delta;
6038 hdr_next += delta;
6039 cur_hdr->len += delta;
6040 http_msg_move_end(&txn->req, delta);
6041 prev = del_from;
6042 del_from = NULL;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6043 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6044 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6045
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6046 /* Look for the appsession cookie unless persistence must be ignored */
6047 if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
6048 int cmp_len, value_len;
6049 char *value_begin;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]6050
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6051 if (t->be->options2 & PR_O2_AS_PFX) {
6052 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6053 value_begin = att_beg + t->be->appsession_name_len;
6054 value_len = val_end - att_beg - t->be->appsession_name_len;
6055 } else {
6056 cmp_len = att_end - att_beg;
6057 value_begin = val_beg;
6058 value_len = val_end - val_beg;
6059 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6060
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6061 /* let's see if the cookie is our appcookie */
6062 if (cmp_len == t->be->appsession_name_len &&
6063 memcmp(att_beg, t->be->appsession_name, cmp_len) == 0) {
6064 manage_client_side_appsession(t, value_begin, value_len);
6065 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6066 }
6067
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6068 /* continue with next cookie on this header line */
6069 att_beg = next;
6070 } /* for each cookie */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6071
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6072 /* There are no more cookies on this line.
6073 * We may still have one (or several) marked for deletion at the
6074 * end of the line. We must do this now in two ways :
6075 * - if some cookies must be preserved, we only delete from the
6076 * mark to the end of line ;
6077 * - if nothing needs to be preserved, simply delete the whole header
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6078 */
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6079 if (del_from) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6080 int delta;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6081 if (preserve_hdr) {
6082 delta = del_hdr_value(req, &del_from, hdr_end);
6083 hdr_end = del_from;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6084 cur_hdr->len += delta;
6085 } else {
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6086 delta = buffer_replace2(req, hdr_beg, hdr_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6087
6088 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6089 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6090 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6091 cur_hdr->len = 0;
6092 }
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6093 hdr_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6094 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6095 }
6096
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6097 /* check next header */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6098 old_idx = cur_idx;
Willy Tarreaueb7b0a22010-08-31 16:45:02 +0200[diff] [blame]6099 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6100}
6101
6102
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6103/* Iterate the same filter through all response headers contained in <rtr>.
6104 * Returns 1 if this filter can be stopped upon return, otherwise 0.
6105 */
6106int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6107{
6108 char term;
6109 char *cur_ptr, *cur_end, *cur_next;
6110 int cur_idx, old_idx, last_hdr;
6111 struct http_txn *txn = &t->txn;
6112 struct hdr_idx_elem *cur_hdr;
6113 int len, delta;
6114
6115 last_hdr = 0;
6116
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6117 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6118 old_idx = 0;
6119
6120 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6121 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6122 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6123 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6124 (exp->action == ACT_ALLOW ||
6125 exp->action == ACT_DENY))
6126 return 0;
6127
6128 cur_idx = txn->hdr_idx.v[old_idx].next;
6129 if (!cur_idx)
6130 break;
6131
6132 cur_hdr = &txn->hdr_idx.v[cur_idx];
6133 cur_ptr = cur_next;
6134 cur_end = cur_ptr + cur_hdr->len;
6135 cur_next = cur_end + cur_hdr->cr + 1;
6136
6137 /* Now we have one header between cur_ptr and cur_end,
6138 * and the next header starts at cur_next.
6139 */
6140
6141 /* The annoying part is that pattern matching needs
6142 * that we modify the contents to null-terminate all
6143 * strings before testing them.
6144 */
6145
6146 term = *cur_end;
6147 *cur_end = '\0';
6148
6149 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6150 switch (exp->action) {
6151 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6152 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6153 last_hdr = 1;
6154 break;
6155
6156 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6157 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6158 last_hdr = 1;
6159 break;
6160
6161 case ACT_REPLACE:
6162 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6163 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6164 /* FIXME: if the user adds a newline in the replacement, the
6165 * index will not be recalculated for now, and the new line
6166 * will not be counted as a new header.
6167 */
6168
6169 cur_end += delta;
6170 cur_next += delta;
6171 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6172 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6173 break;
6174
6175 case ACT_REMOVE:
6176 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
6177 cur_next += delta;
6178
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6179 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6180 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6181 txn->hdr_idx.used--;
6182 cur_hdr->len = 0;
6183 cur_end = NULL; /* null-term has been rewritten */
6184 break;
6185
6186 }
6187 }
6188 if (cur_end)
6189 *cur_end = term; /* restore the string terminator */
6190
6191 /* keep the link from this header to next one in case of later
6192 * removal of next header.
6193 */
6194 old_idx = cur_idx;
6195 }
6196 return 0;
6197}
6198
6199
6200/* Apply the filter to the status line in the response buffer <rtr>.
6201 * Returns 0 if nothing has been done, 1 if the filter has been applied,
6202 * or -1 if a replacement resulted in an invalid status line.
6203 */
6204int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
6205{
6206 char term;
6207 char *cur_ptr, *cur_end;
6208 int done;
6209 struct http_txn *txn = &t->txn;
6210 int len, delta;
6211
6212
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6213 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6214 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6215 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6216 (exp->action == ACT_ALLOW ||
6217 exp->action == ACT_DENY))
6218 return 0;
6219 else if (exp->action == ACT_REMOVE)
6220 return 0;
6221
6222 done = 0;
6223
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6224 cur_ptr = txn->rsp.sol;
Willy Tarreau1ba0e5f2010-06-07 13:57:32 +0200[diff] [blame]6225 cur_end = cur_ptr + txn->rsp.sl.st.l;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6226
6227 /* Now we have the status line between cur_ptr and cur_end */
6228
6229 /* The annoying part is that pattern matching needs
6230 * that we modify the contents to null-terminate all
6231 * strings before testing them.
6232 */
6233
6234 term = *cur_end;
6235 *cur_end = '\0';
6236
6237 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
6238 switch (exp->action) {
6239 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6240 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6241 done = 1;
6242 break;
6243
6244 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6245 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6246 done = 1;
6247 break;
6248
6249 case ACT_REPLACE:
6250 *cur_end = term; /* restore the string terminator */
6251 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
6252 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
6253 /* FIXME: if the user adds a newline in the replacement, the
6254 * index will not be recalculated for now, and the new line
6255 * will not be counted as a new header.
6256 */
6257
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6258 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6259 cur_end += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6260 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]6261 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6262 cur_ptr, cur_end + 1,
6263 NULL, NULL);
6264 if (unlikely(!cur_end))
6265 return -1;
6266
6267 /* we have a full respnse and we know that we have either a CR
6268 * or an LF at <ptr>.
6269 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6270 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]6271 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]6272 /* there is no point trying this regex on headers */
6273 return 1;
6274 }
6275 }
6276 *cur_end = term; /* restore the string terminator */
6277 return done;
6278}
6279
6280
6281
6282/*
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6283 * 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]6284 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
6285 * unparsable response.
6286 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6287int apply_filters_to_response(struct session *s, struct buffer *rtr, struct proxy *px)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6288{
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6289 struct http_txn *txn = &s->txn;
6290 struct hdr_exp *exp;
6291
6292 for (exp = px->rsp_exp; exp; exp = exp->next) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6293 int ret;
6294
6295 /*
6296 * The interleaving of transformations and verdicts
6297 * makes it difficult to decide to continue or stop
6298 * the evaluation.
6299 */
6300
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6301 if (txn->flags & TX_SVDENY)
6302 break;
6303
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6304 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6305 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
6306 exp->action == ACT_PASS)) {
6307 exp = exp->next;
6308 continue;
6309 }
6310
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6311 /* if this filter had a condition, evaluate it now and skip to
6312 * next filter if the condition does not match.
6313 */
6314 if (exp->cond) {
6315 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_RTR);
6316 ret = acl_pass(ret);
6317 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
6318 ret = !ret;
6319 if (!ret)
6320 continue;
6321 }
6322
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6323 /* Apply the filter to the status line. */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6324 ret = apply_filter_to_sts_line(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6325 if (unlikely(ret < 0))
6326 return -1;
6327
6328 if (likely(ret == 0)) {
6329 /* The filter did not match the response, it can be
6330 * iterated through all headers.
6331 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6332 apply_filter_to_resp_headers(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6333 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6334 }
6335 return 0;
6336}
6337
6338
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6339/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6340 * Manage server-side cookies. It can impact performance by about 2% so it is
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6341 * desirable to call it only when needed. This function is also used when we
6342 * just need to know if there is a cookie (eg: for check-cache).
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6343 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6344void manage_server_side_cookies(struct session *t, struct buffer *res)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6345{
6346 struct http_txn *txn = &t->txn;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6347 int is_cookie2;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6348 int cur_idx, old_idx, delta;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6349 char *hdr_beg, *hdr_end, *hdr_next;
6350 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6351
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6352 /* Iterate through the headers.
6353 * we start with the start line.
6354 */
6355 old_idx = 0;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6356 hdr_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6357
6358 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
6359 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6360 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6361
6362 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6363 hdr_beg = hdr_next;
6364 hdr_end = hdr_beg + cur_hdr->len;
6365 hdr_next = hdr_end + cur_hdr->cr + 1;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6366
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6367 /* We have one full header between hdr_beg and hdr_end, and the
6368 * next header starts at hdr_next. We're only interested in
6369 * "Set-Cookie" and "Set-Cookie2" headers.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6370 */
6371
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6372 is_cookie2 = 0;
6373 prev = hdr_beg + 10;
6374 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie", 10);
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6375 if (!val) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6376 val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie2", 11);
6377 if (!val) {
6378 old_idx = cur_idx;
6379 continue;
6380 }
6381 is_cookie2 = 1;
6382 prev = hdr_beg + 11;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6383 }
6384
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6385 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
6386 * <prev> points to the colon.
6387 */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6388 txn->flags |= TX_SCK_ANY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6389
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6390 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
6391 * check-cache is enabled) and we are not interested in checking
6392 * them. Warning, the cookie capture is declared in the frontend.
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6393 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6394 if (t->be->cookie_name == NULL &&
6395 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6396 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6397 return;
6398
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6399 /* OK so now we know we have to process this response cookie.
6400 * The format of the Set-Cookie header is slightly different
6401 * from the format of the Cookie header in that it does not
6402 * support the comma as a cookie delimiter (thus the header
6403 * cannot be folded) because the Expires attribute described in
6404 * the original Netscape's spec may contain an unquoted date
6405 * with a comma inside. We have to live with this because
6406 * many browsers don't support Max-Age and some browsers don't
6407 * support quoted strings. However the Set-Cookie2 header is
6408 * clean.
6409 *
6410 * We have to keep multiple pointers in order to support cookie
6411 * removal at the beginning, middle or end of header without
6412 * corrupting the header (in case of set-cookie2). A special
6413 * pointer, <scav> points to the beginning of the set-cookie-av
6414 * fields after the first semi-colon. The <next> pointer points
6415 * either to the end of line (set-cookie) or next unquoted comma
6416 * (set-cookie2). All of these headers are valid :
6417 *
6418 * Set-Cookie: NAME1 = VALUE 1 ; Secure; Path="/"\r\n
6419 * Set-Cookie:NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6420 * Set-Cookie: NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
6421 * Set-Cookie2: NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard\r\n
6422 * | | | | | | | | | |
6423 * | | | | | | | | +-> next hdr_end <--+
6424 * | | | | | | | +------------> scav
6425 * | | | | | | +--------------> val_end
6426 * | | | | | +--------------------> val_beg
6427 * | | | | +----------------------> equal
6428 * | | | +------------------------> att_end
6429 * | | +----------------------------> att_beg
6430 * | +------------------------------> prev
6431 * +-----------------------------------------> hdr_beg
6432 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6433
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6434 for (; prev < hdr_end; prev = next) {
6435 /* Iterate through all cookies on this line */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6436
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6437 /* find att_beg */
6438 att_beg = prev + 1;
6439 while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg])
6440 att_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6441
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6442 /* find att_end : this is the first character after the last non
6443 * space before the equal. It may be equal to hdr_end.
6444 */
6445 equal = att_end = att_beg;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6446
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6447 while (equal < hdr_end) {
6448 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
6449 break;
6450 if (http_is_spht[(unsigned char)*equal++])
6451 continue;
6452 att_end = equal;
6453 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6454
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6455 /* here, <equal> points to '=', a delimitor or the end. <att_end>
6456 * is between <att_beg> and <equal>, both may be identical.
6457 */
6458
6459 /* look for end of cookie if there is an equal sign */
6460 if (equal < hdr_end && *equal == '=') {
6461 /* look for the beginning of the value */
6462 val_beg = equal + 1;
6463 while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg])
6464 val_beg++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6465
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6466 /* find the end of the value, respecting quotes */
6467 next = find_cookie_value_end(val_beg, hdr_end);
6468
6469 /* make val_end point to the first white space or delimitor after the value */
6470 val_end = next;
6471 while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)])
6472 val_end--;
6473 } else {
6474 /* <equal> points to next comma, semi-colon or EOL */
6475 val_beg = val_end = next = equal;
6476 }
6477
6478 if (next < hdr_end) {
6479 /* Set-Cookie2 supports multiple cookies, and <next> points to
6480 * a colon or semi-colon before the end. So skip all attr-value
6481 * pairs and look for the next comma. For Set-Cookie, since
6482 * commas are permitted in values, skip to the end.
6483 */
6484 if (is_cookie2)
6485 next = find_hdr_value_end(next, hdr_end);
6486 else
6487 next = hdr_end;
6488 }
6489
6490 /* Now everything is as on the diagram above */
6491
6492 /* Ignore cookies with no equal sign */
6493 if (equal == val_end)
6494 continue;
6495
6496 /* If there are spaces around the equal sign, we need to
6497 * strip them otherwise we'll get trouble for cookie captures,
6498 * or even for rewrites. Since this happens extremely rarely,
6499 * it does not hurt performance.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6500 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6501 if (unlikely(att_end != equal || val_beg > equal + 1)) {
6502 int stripped_before = 0;
6503 int stripped_after = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6504
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6505 if (att_end != equal) {
6506 stripped_before = buffer_replace2(res, att_end, equal, NULL, 0);
6507 equal += stripped_before;
6508 val_beg += stripped_before;
6509 }
6510
6511 if (val_beg > equal + 1) {
6512 stripped_after = buffer_replace2(res, equal + 1, val_beg, NULL, 0);
6513 val_beg += stripped_after;
6514 stripped_before += stripped_after;
6515 }
6516
6517 val_end += stripped_before;
6518 next += stripped_before;
6519 hdr_end += stripped_before;
6520 hdr_next += stripped_before;
6521 cur_hdr->len += stripped_before;
6522 http_msg_move_end(&txn->req, stripped_before);
6523 }
6524
6525 /* First, let's see if we want to capture this cookie. We check
6526 * that we don't already have a server side cookie, because we
6527 * can only capture one. Also as an optimisation, we ignore
6528 * cookies shorter than the declared name.
6529 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6530 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6531 txn->srv_cookie == NULL &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6532 (val_end - att_beg >= t->fe->capture_namelen) &&
6533 memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) {
6534 int log_len = val_end - att_beg;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]6535 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6536 Alert("HTTP logging : out of memory.\n");
6537 }
6538
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6539 if (log_len > t->fe->capture_len)
6540 log_len = t->fe->capture_len;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6541 memcpy(txn->srv_cookie, att_beg, log_len);
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6542 txn->srv_cookie[log_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6543 }
6544
6545 /* now check if we need to process it for persistence */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6546 if (!(t->flags & SN_IGNORE_PRST) &&
6547 (att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6548 (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6549 txn->flags |= TX_SCK_SEEN;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6550
6551 /* If the cookie is in insert mode on a known server, we'll delete
6552 * this occurrence because we'll insert another one later.
6553 * 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]6554 * a direct access.
6555 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6556 if (((t->srv) && (t->be->options & PR_O_COOK_INS)) ||
6557 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6558 /* this cookie must be deleted */
6559 if (*prev == ':' && next == hdr_end) {
6560 /* whole header */
6561 delta = buffer_replace2(res, hdr_beg, hdr_next, NULL, 0);
6562 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6563 txn->hdr_idx.used--;
6564 cur_hdr->len = 0;
6565 hdr_next += delta;
6566 http_msg_move_end(&txn->rsp, delta);
6567 /* note: while both invalid now, <next> and <hdr_end>
6568 * are still equal, so the for() will stop as expected.
6569 */
6570 } else {
6571 /* just remove the value */
6572 int delta = del_hdr_value(res, &prev, next);
6573 next = prev;
6574 hdr_end += delta;
6575 hdr_next += delta;
6576 cur_hdr->len += delta;
6577 http_msg_move_end(&txn->rsp, delta);
6578 }
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6579 txn->flags |= TX_SCK_DELETED;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6580 /* and go on with next cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6581 }
6582 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6583 (t->be->options & PR_O_COOK_RW)) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6584 /* replace bytes val_beg->val_end with the cookie name associated
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6585 * with this server since we know it.
6586 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6587 delta = buffer_replace2(res, val_beg, val_end, t->srv->cookie, t->srv->cklen);
6588 next += delta;
6589 hdr_end += delta;
6590 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6591 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6592 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6593
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6594 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6595 }
6596 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6597 (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6598 /* insert the cookie name associated with this server
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6599 * before existing cookie, and insert a delimiter between them..
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6600 */
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6601 delta = buffer_replace2(res, val_beg, val_beg, t->srv->cookie, t->srv->cklen + 1);
6602 next += delta;
6603 hdr_end += delta;
6604 hdr_next += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6605 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6606 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6607
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6608 val_beg[t->srv->cklen] = COOKIE_DELIM;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6609 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6610 }
6611 }
Cyril Bonté47fdd8e2010-04-25 00:00:51 +0200[diff] [blame]6612 /* next, let's see if the cookie is our appcookie, unless persistence must be ignored */
6613 else if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6614 int cmp_len, value_len;
6615 char *value_begin;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6616
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6617 if (t->be->options2 & PR_O2_AS_PFX) {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6618 cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len);
6619 value_begin = att_beg + t->be->appsession_name_len;
6620 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]6621 } else {
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6622 cmp_len = att_end - att_beg;
6623 value_begin = val_beg;
6624 value_len = MIN(t->be->appsession_len, val_end - val_beg);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6625 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6626
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]6627 if ((cmp_len == t->be->appsession_name_len) &&
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6628 (memcmp(att_beg, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
6629 /* free a possibly previously allocated memory */
6630 pool_free2(apools.sessid, txn->sessid);
6631
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6632 /* Store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6633 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6634 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6635 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
6636 return;
6637 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6638 memcpy(txn->sessid, value_begin, value_len);
6639 txn->sessid[value_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6640 }
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6641 }
6642 /* that's done for this cookie, check the next one on the same
6643 * line when next != hdr_end (only if is_cookie2).
6644 */
6645 }
6646 /* check next header */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6647 old_idx = cur_idx;
Willy Tarreau24581ba2010-08-31 22:39:35 +0200[diff] [blame]6648 }
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6649
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6650 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6651 appsess *asession = NULL;
6652 /* only do insert, if lookup fails */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6653 asession = appsession_hash_lookup(&(t->be->htbl_proxy), txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6654 if (asession == NULL) {
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]6655 size_t server_id_len;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6656 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
6657 Alert("Not enough Memory process_srv():asession:calloc().\n");
6658 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
6659 return;
6660 }
6661 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
6662 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6663 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]6664 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6665 return;
6666 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6667 memcpy(asession->sessid, txn->sessid, t->be->appsession_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6668 asession->sessid[t->be->appsession_len] = 0;
6669
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]6670 server_id_len = strlen(t->srv->id) + 1;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6671 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
6672 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6673 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]6674 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6675 return;
6676 }
6677 asession->serverid[0] = '\0';
6678 memcpy(asession->serverid, t->srv->id, server_id_len);
6679
6680 asession->request_count = 0;
6681 appsession_hash_insert(&(t->be->htbl_proxy), asession);
6682 }
6683
6684 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
6685 asession->request_count++;
6686 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6687}
6688
6689
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6690/*
6691 * Check if response is cacheable or not. Updates t->flags.
6692 */
6693void check_response_for_cacheability(struct session *t, struct buffer *rtr)
6694{
6695 struct http_txn *txn = &t->txn;
6696 char *p1, *p2;
6697
6698 char *cur_ptr, *cur_end, *cur_next;
6699 int cur_idx;
6700
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]6701 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6702 return;
6703
6704 /* Iterate through the headers.
6705 * we start with the start line.
6706 */
6707 cur_idx = 0;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6708 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6709
6710 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
6711 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6712 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6713
6714 cur_hdr = &txn->hdr_idx.v[cur_idx];
6715 cur_ptr = cur_next;
6716 cur_end = cur_ptr + cur_hdr->len;
6717 cur_next = cur_end + cur_hdr->cr + 1;
6718
6719 /* We have one full header between cur_ptr and cur_end, and the
6720 * next header starts at cur_next. We're only interested in
6721 * "Cookie:" headers.
6722 */
6723
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6724 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
6725 if (val) {
6726 if ((cur_end - (cur_ptr + val) >= 8) &&
6727 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
6728 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
6729 return;
6730 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6731 }
6732
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6733 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
6734 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6735 continue;
6736
6737 /* OK, right now we know we have a cache-control header at cur_ptr */
6738
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6739 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6740
6741 if (p1 >= cur_end) /* no more info */
6742 continue;
6743
6744 /* p1 is at the beginning of the value */
6745 p2 = p1;
6746
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]6747 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6748 p2++;
6749
6750 /* we have a complete value between p1 and p2 */
6751 if (p2 < cur_end && *p2 == '=') {
6752 /* we have something of the form no-cache="set-cookie" */
6753 if ((cur_end - p1 >= 21) &&
6754 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
6755 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6756 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6757 continue;
6758 }
6759
6760 /* OK, so we know that either p2 points to the end of string or to a comma */
6761 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
6762 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
6763 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
6764 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6765 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6766 return;
6767 }
6768
6769 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6770 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6771 continue;
6772 }
6773 }
6774}
6775
6776
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6777/*
6778 * Try to retrieve a known appsession in the URI, then the associated server.
6779 * If the server is found, it's assigned to the session.
6780 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6781void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6782{
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6783 char *end_params, *first_param, *cur_param, *next_param;
6784 char separator;
6785 int value_len;
6786
6787 int mode = t->be->options2 & PR_O2_AS_M_ANY;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6788
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6789 if (t->be->appsession_name == NULL ||
Cyril Bonté17530c32010-04-06 21:11:10 +0200[diff] [blame]6790 (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]6791 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6792 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6793
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6794 first_param = NULL;
6795 switch (mode) {
6796 case PR_O2_AS_M_PP:
6797 first_param = memchr(begin, ';', len);
6798 break;
6799 case PR_O2_AS_M_QS:
6800 first_param = memchr(begin, '?', len);
6801 break;
6802 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6803
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6804 if (first_param == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6805 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6806 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6807
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6808 switch (mode) {
6809 case PR_O2_AS_M_PP:
6810 if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) {
6811 end_params = (char *) begin + len;
6812 }
6813 separator = ';';
6814 break;
6815 case PR_O2_AS_M_QS:
6816 end_params = (char *) begin + len;
6817 separator = '&';
6818 break;
6819 default:
6820 /* unknown mode, shouldn't happen */
6821 return;
6822 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6823
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6824 cur_param = next_param = end_params;
6825 while (cur_param > first_param) {
6826 cur_param--;
6827 if ((cur_param[0] == separator) || (cur_param == first_param)) {
6828 /* let's see if this is the appsession parameter */
6829 if ((cur_param + t->be->appsession_name_len + 1 < next_param) &&
6830 ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') &&
6831 (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
6832 /* Cool... it's the right one */
6833 cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2);
6834 value_len = MIN(t->be->appsession_len, next_param - cur_param);
6835 if (value_len > 0) {
6836 manage_client_side_appsession(t, cur_param, value_len);
6837 }
6838 break;
6839 }
6840 next_param = cur_param;
6841 }
6842 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6843#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]6844 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]6845 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6846#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6847}
6848
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6849/*
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]6850 * In a GET or HEAD request, check if the requested URI matches the stats uri
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6851 * for the current backend.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6852 *
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]6853 * It is assumed that the request is either a HEAD or GET and that the
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6854 * t->be->uri_auth field is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6855 *
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6856 * Returns 1 if stats should be provided, otherwise 0.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6857 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6858int stats_check_uri(struct session *t, struct proxy *backend)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6859{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6860 struct http_txn *txn = &t->txn;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6861 struct uri_auth *uri_auth = backend->uri_auth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6862 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6863
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6864 if (!uri_auth)
6865 return 0;
6866
6867 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD)
6868 return 0;
6869
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6870 memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats));
6871
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6872 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6873 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6874 return 0;
6875
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6876 h = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6877
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]6878 /* the URI is in h */
6879 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6880 return 0;
6881
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]6882 h += uri_auth->uri_len;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6883 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]6884 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6885 t->data_ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]6886 break;
6887 }
6888 h++;
6889 }
6890
6891 if (uri_auth->refresh) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6892 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
6893 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]6894 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6895 t->data_ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]6896 break;
6897 }
6898 h++;
6899 }
6900 }
6901
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6902 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
6903 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]6904 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6905 t->data_ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]6906 break;
6907 }
6908 h++;
6909 }
6910
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6911 t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
6912
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6913 return 1;
6914}
6915
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6916/*
6917 * Capture a bad request or response and archive it in the proxy's structure.
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6918 * WARNING: it's unlikely that we've reached HTTP_MSG_BODY here so we must not
6919 * assume that msg->sol = buf->data + msg->som.
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6920 */
6921void http_capture_bad_message(struct error_snapshot *es, struct session *s,
6922 struct buffer *buf, struct http_msg *msg,
6923 struct proxy *other_end)
6924{
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]6925 es->len = buf->r - (buf->data + msg->som);
6926 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6927 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]6928 es->pos = msg->err_pos - msg->som;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6929 else
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]6930 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6931 es->when = date; // user-visible date
6932 es->sid = s->uniq_id;
6933 es->srv = s->srv;
6934 es->oe = other_end;
6935 es->src = s->cli_addr;
6936}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6937
Willy Tarreaubce70882009-09-07 11:51:47 +0200[diff] [blame]6938/* return the IP address pointed to by occurrence <occ> of header <hname> in
6939 * HTTP message <msg> indexed in <idx>. If <occ> is strictly positive, the
6940 * occurrence number corresponding to this value is returned. If <occ> is
6941 * strictly negative, the occurrence number before the end corresponding to
6942 * this value is returned. If <occ> is null, any value is returned, so it is
6943 * not recommended to use it that way. Negative occurrences are limited to
6944 * a small value because it is required to keep them in memory while scanning.
6945 * IP address 0.0.0.0 is returned if no match is found.
6946 */
6947unsigned int get_ip_from_hdr2(struct http_msg *msg, const char *hname, int hlen, struct hdr_idx *idx, int occ)
6948{
6949 struct hdr_ctx ctx;
6950 unsigned int hdr_hist[MAX_HDR_HISTORY];
6951 unsigned int hist_ptr;
6952 int found = 0;
6953
6954 ctx.idx = 0;
6955 if (occ >= 0) {
6956 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
6957 occ--;
6958 if (occ <= 0) {
6959 found = 1;
6960 break;
6961 }
6962 }
6963 if (!found)
6964 return 0;
6965 return inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
6966 }
6967
6968 /* negative occurrence, we scan all the list then walk back */
6969 if (-occ > MAX_HDR_HISTORY)
6970 return 0;
6971
6972 hist_ptr = 0;
6973 hdr_hist[hist_ptr] = 0;
6974 while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) {
6975 hdr_hist[hist_ptr++] = inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen);
6976 if (hist_ptr >= MAX_HDR_HISTORY)
6977 hist_ptr = 0;
6978 found++;
6979 }
6980 if (-occ > found)
6981 return 0;
6982 /* OK now we have the last occurrence in [hist_ptr-1], and we need to
6983 * find occurrence -occ, so we have to check [hist_ptr+occ].
6984 */
6985 hist_ptr += occ;
6986 if (hist_ptr >= MAX_HDR_HISTORY)
6987 hist_ptr -= MAX_HDR_HISTORY;
6988 return hdr_hist[hist_ptr];
6989}
6990
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]6991/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6992 * Print a debug line with a header
6993 */
6994void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
6995{
6996 int len, max;
6997 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]6998 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6999 max = end - start;
7000 UBOUND(max, sizeof(trash) - len - 1);
7001 len += strlcpy2(trash + len, start, max + 1);
7002 trash[len++] = '\n';
7003 write(1, trash, len);
7004}
7005
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7006/*
7007 * Initialize a new HTTP transaction for session <s>. It is assumed that all
7008 * the required fields are properly allocated and that we only need to (re)init
7009 * them. This should be used before processing any new request.
7010 */
7011void http_init_txn(struct session *s)
7012{
7013 struct http_txn *txn = &s->txn;
7014 struct proxy *fe = s->fe;
7015
7016 txn->flags = 0;
7017 txn->status = -1;
7018
7019 txn->req.sol = txn->req.eol = NULL;
7020 txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
7021 txn->rsp.sol = txn->rsp.eol = NULL;
7022 txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */
7023 txn->req.hdr_content_len = 0LL;
7024 txn->rsp.hdr_content_len = 0LL;
7025 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
7026 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]7027
7028 txn->auth.method = HTTP_AUTH_UNKNOWN;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7029
7030 txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
7031 if (fe->options2 & PR_O2_REQBUG_OK)
7032 txn->req.err_pos = -1; /* let buggy requests pass */
7033
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7034 if (txn->req.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7035 memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *));
7036
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7037 if (txn->rsp.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7038 memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *));
7039
7040 if (txn->hdr_idx.v)
7041 hdr_idx_init(&txn->hdr_idx);
7042}
7043
7044/* to be used at the end of a transaction */
7045void http_end_txn(struct session *s)
7046{
7047 struct http_txn *txn = &s->txn;
7048
7049 /* these ones will have been dynamically allocated */
7050 pool_free2(pool2_requri, txn->uri);
7051 pool_free2(pool2_capture, txn->cli_cookie);
7052 pool_free2(pool2_capture, txn->srv_cookie);
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7053 pool_free2(apools.sessid, txn->sessid);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7054
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]7055 txn->sessid = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7056 txn->uri = NULL;
7057 txn->srv_cookie = NULL;
7058 txn->cli_cookie = NULL;
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]7059
7060 if (txn->req.cap) {
7061 struct cap_hdr *h;
7062 for (h = s->fe->req_cap; h; h = h->next)
7063 pool_free2(h->pool, txn->req.cap[h->index]);
7064 memset(txn->req.cap, 0, s->fe->nb_req_cap * sizeof(void *));
7065 }
7066
7067 if (txn->rsp.cap) {
7068 struct cap_hdr *h;
7069 for (h = s->fe->rsp_cap; h; h = h->next)
7070 pool_free2(h->pool, txn->rsp.cap[h->index]);
7071 memset(txn->rsp.cap, 0, s->fe->nb_rsp_cap * sizeof(void *));
7072 }
7073
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7074}
7075
7076/* to be used at the end of a transaction to prepare a new one */
7077void http_reset_txn(struct session *s)
7078{
7079 http_end_txn(s);
7080 http_init_txn(s);
7081
7082 s->be = s->fe;
7083 s->req->analysers = s->listener->analysers;
7084 s->logs.logwait = s->fe->to_log;
7085 s->srv = s->prev_srv = s->srv_conn = NULL;
Emeric Brunb982a3d2010-01-04 15:45:53 +0100[diff] [blame]7086 /* re-init store persistence */
7087 s->store_count = 0;
7088
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7089 s->pend_pos = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7090
7091 s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
7092
Willy Tarreau739cfba2010-01-25 23:11:14 +0100[diff] [blame]7093 /* We must trim any excess data from the response buffer, because we
7094 * may have blocked an invalid response from a server that we don't
7095 * want to accidentely forward once we disable the analysers, nor do
7096 * we want those data to come along with next response. A typical
7097 * example of such data would be from a buggy server responding to
7098 * a HEAD with some data, or sending more than the advertised
7099 * content-length.
7100 */
7101 if (unlikely(s->rep->l > s->rep->send_max)) {
7102 s->rep->l = s->rep->send_max;
7103 s->rep->r = s->rep->w + s->rep->l;
7104 if (s->rep->r >= s->rep->data + s->rep->size)
7105 s->rep->r -= s->rep->size;
7106 }
7107
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7108 s->req->rto = s->fe->timeout.client;
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7109 s->req->wto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7110
Willy Tarreaud04e8582010-05-31 12:31:35 +0200[diff] [blame]7111 s->rep->rto = TICK_ETERNITY;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7112 s->rep->wto = s->fe->timeout.client;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]7113
7114 s->req->rex = TICK_ETERNITY;
7115 s->req->wex = TICK_ETERNITY;
7116 s->req->analyse_exp = TICK_ETERNITY;
7117 s->rep->rex = TICK_ETERNITY;
7118 s->rep->wex = TICK_ETERNITY;
7119 s->rep->analyse_exp = TICK_ETERNITY;
7120}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7121
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7122/************************************************************************/
7123/* The code below is dedicated to ACL parsing and matching */
7124/************************************************************************/
7125
7126
7127
7128
7129/* 1. Check on METHOD
7130 * We use the pre-parsed method if it is known, and store its number as an
7131 * integer. If it is unknown, we use the pointer and the length.
7132 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7133static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7134{
7135 int len, meth;
7136
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7137 len = strlen(*text);
7138 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7139
7140 pattern->val.i = meth;
7141 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7142 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7143 if (!pattern->ptr.str)
7144 return 0;
7145 pattern->len = len;
7146 }
7147 return 1;
7148}
7149
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7150static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7151acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
7152 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7153{
7154 int meth;
7155 struct http_txn *txn = l7;
7156
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7157 if (!txn)
7158 return 0;
7159
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7160 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7161 return 0;
7162
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7163 meth = txn->meth;
7164 test->i = meth;
7165 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7166 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7167 /* ensure the indexes are not affected */
7168 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7169 test->len = txn->req.sl.rq.m_l;
7170 test->ptr = txn->req.sol;
7171 }
7172 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7173 return 1;
7174}
7175
7176static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
7177{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7178 int icase;
7179
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7180 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7181 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7182
7183 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7184 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7185
7186 /* Other method, we must compare the strings */
7187 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7188 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]7189
7190 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
7191 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
7192 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]7193 return ACL_PAT_FAIL;
7194 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7195}
7196
7197/* 2. Check on Request/Status Version
7198 * We simply compare strings here.
7199 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7200static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7201{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7202 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7203 if (!pattern->ptr.str)
7204 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]7205 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7206 return 1;
7207}
7208
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7209static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7210acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
7211 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7212{
7213 struct http_txn *txn = l7;
7214 char *ptr;
7215 int len;
7216
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7217 if (!txn)
7218 return 0;
7219
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7220 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7221 return 0;
7222
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7223 len = txn->req.sl.rq.v_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7224 ptr = txn->req.sol + txn->req.sl.rq.v;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7225
7226 while ((len-- > 0) && (*ptr++ != '/'));
7227 if (len <= 0)
7228 return 0;
7229
7230 test->ptr = ptr;
7231 test->len = len;
7232
7233 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7234 return 1;
7235}
7236
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7237static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7238acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
7239 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7240{
7241 struct http_txn *txn = l7;
7242 char *ptr;
7243 int len;
7244
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7245 if (!txn)
7246 return 0;
7247
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7248 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7249 return 0;
7250
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7251 len = txn->rsp.sl.st.v_l;
7252 ptr = txn->rsp.sol;
7253
7254 while ((len-- > 0) && (*ptr++ != '/'));
7255 if (len <= 0)
7256 return 0;
7257
7258 test->ptr = ptr;
7259 test->len = len;
7260
7261 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
7262 return 1;
7263}
7264
7265/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7266static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7267acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
7268 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7269{
7270 struct http_txn *txn = l7;
7271 char *ptr;
7272 int len;
7273
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7274 if (!txn)
7275 return 0;
7276
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7277 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7278 return 0;
7279
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7280 len = txn->rsp.sl.st.c_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7281 ptr = txn->rsp.sol + txn->rsp.sl.st.c;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7282
7283 test->i = __strl2ui(ptr, len);
7284 test->flags = ACL_TEST_F_VOL_1ST;
7285 return 1;
7286}
7287
7288/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]7289static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]7290acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
7291 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7292{
7293 struct http_txn *txn = l7;
7294
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7295 if (!txn)
7296 return 0;
7297
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7298 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7299 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7300
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7301 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7302 /* ensure the indexes are not affected */
7303 return 0;
7304
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7305 test->len = txn->req.sl.rq.u_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7306 test->ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7307
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]7308 /* we do not need to set READ_ONLY because the data is in a buffer */
7309 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7310 return 1;
7311}
7312
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7313static int
7314acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7315 struct acl_expr *expr, struct acl_test *test)
7316{
7317 struct http_txn *txn = l7;
7318
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7319 if (!txn)
7320 return 0;
7321
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7322 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7323 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7324
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7325 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7326 /* ensure the indexes are not affected */
7327 return 0;
7328
7329 /* Parse HTTP request */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7330 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]7331 test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr;
7332 test->i = AF_INET;
7333
7334 /*
7335 * If we are parsing url in frontend space, we prepare backend stage
7336 * to not parse again the same url ! optimization lazyness...
7337 */
7338 if (px->options & PR_O_HTTP_PROXY)
7339 l4->flags |= SN_ADDR_SET;
7340
7341 test->flags = ACL_TEST_F_READ_ONLY;
7342 return 1;
7343}
7344
7345static int
7346acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
7347 struct acl_expr *expr, struct acl_test *test)
7348{
7349 struct http_txn *txn = l7;
7350
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7351 if (!txn)
7352 return 0;
7353
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7354 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7355 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7356
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]7357 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7358 /* ensure the indexes are not affected */
7359 return 0;
7360
7361 /* Same optimization as url_ip */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7362 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]7363 test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port);
7364
7365 if (px->options & PR_O_HTTP_PROXY)
7366 l4->flags |= SN_ADDR_SET;
7367
7368 test->flags = ACL_TEST_F_READ_ONLY;
7369 return 1;
7370}
7371
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7372/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
7373 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
7374 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7375static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7376acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7377 struct acl_expr *expr, struct acl_test *test)
7378{
7379 struct http_txn *txn = l7;
7380 struct hdr_idx *idx = &txn->hdr_idx;
7381 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7382
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7383 if (!txn)
7384 return 0;
7385
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7386 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7387 /* search for header from the beginning */
7388 ctx->idx = 0;
7389
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7390 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7391 test->flags |= ACL_TEST_F_FETCH_MORE;
7392 test->flags |= ACL_TEST_F_VOL_HDR;
7393 test->len = ctx->vlen;
7394 test->ptr = (char *)ctx->line + ctx->val;
7395 return 1;
7396 }
7397
7398 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7399 test->flags |= ACL_TEST_F_VOL_HDR;
7400 return 0;
7401}
7402
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7403static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7404acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
7405 struct acl_expr *expr, struct acl_test *test)
7406{
7407 struct http_txn *txn = l7;
7408
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7409 if (!txn)
7410 return 0;
7411
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7412 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7413 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7414
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7415 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7416 /* ensure the indexes are not affected */
7417 return 0;
7418
7419 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
7420}
7421
7422static int
7423acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
7424 struct acl_expr *expr, struct acl_test *test)
7425{
7426 struct http_txn *txn = l7;
7427
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7428 if (!txn)
7429 return 0;
7430
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7431 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7432 return 0;
7433
7434 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
7435}
7436
7437/* 6. Check on HTTP header count. The number of occurrences is returned.
7438 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
7439 */
7440static int
7441acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7442 struct acl_expr *expr, struct acl_test *test)
7443{
7444 struct http_txn *txn = l7;
7445 struct hdr_idx *idx = &txn->hdr_idx;
7446 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7447 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7448
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7449 if (!txn)
7450 return 0;
7451
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7452 ctx.idx = 0;
7453 cnt = 0;
7454 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
7455 cnt++;
7456
7457 test->i = cnt;
7458 test->flags = ACL_TEST_F_VOL_HDR;
7459 return 1;
7460}
7461
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7462static int
7463acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
7464 struct acl_expr *expr, struct acl_test *test)
7465{
7466 struct http_txn *txn = l7;
7467
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7468 if (!txn)
7469 return 0;
7470
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7471 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7472 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7473
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7474 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7475 /* ensure the indexes are not affected */
7476 return 0;
7477
7478 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
7479}
7480
7481static int
7482acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
7483 struct acl_expr *expr, struct acl_test *test)
7484{
7485 struct http_txn *txn = l7;
7486
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7487 if (!txn)
7488 return 0;
7489
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7490 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7491 return 0;
7492
7493 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
7494}
7495
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7496/* 7. Check on HTTP header's integer value. The integer value is returned.
7497 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7498 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7499 */
7500static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7501acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7502 struct acl_expr *expr, struct acl_test *test)
7503{
7504 struct http_txn *txn = l7;
7505 struct hdr_idx *idx = &txn->hdr_idx;
7506 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7507
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7508 if (!txn)
7509 return 0;
7510
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7511 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7512 /* search for header from the beginning */
7513 ctx->idx = 0;
7514
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7515 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7516 test->flags |= ACL_TEST_F_FETCH_MORE;
7517 test->flags |= ACL_TEST_F_VOL_HDR;
7518 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
7519 return 1;
7520 }
7521
7522 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7523 test->flags |= ACL_TEST_F_VOL_HDR;
7524 return 0;
7525}
7526
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7527static int
7528acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
7529 struct acl_expr *expr, struct acl_test *test)
7530{
7531 struct http_txn *txn = l7;
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->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7537 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7538
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7539 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7540 /* ensure the indexes are not affected */
7541 return 0;
7542
7543 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
7544}
7545
7546static int
7547acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
7548 struct acl_expr *expr, struct acl_test *test)
7549{
7550 struct http_txn *txn = l7;
7551
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7552 if (!txn)
7553 return 0;
7554
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7555 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7556 return 0;
7557
7558 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
7559}
7560
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7561/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
7562 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
7563 */
7564static int
7565acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
7566 struct acl_expr *expr, struct acl_test *test)
7567{
7568 struct http_txn *txn = l7;
7569 struct hdr_idx *idx = &txn->hdr_idx;
7570 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
7571
7572 if (!txn)
7573 return 0;
7574
7575 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7576 /* search for header from the beginning */
7577 ctx->idx = 0;
7578
7579 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7580 test->flags |= ACL_TEST_F_FETCH_MORE;
7581 test->flags |= ACL_TEST_F_VOL_HDR;
7582 /* Same optimization as url_ip */
7583 memset(&l4->srv_addr.sin_addr, 0, sizeof(l4->srv_addr.sin_addr));
7584 url2ip((char *)ctx->line + ctx->val, &l4->srv_addr.sin_addr);
7585 test->ptr = (void *)&l4->srv_addr.sin_addr;
7586 test->i = AF_INET;
7587 return 1;
7588 }
7589
7590 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7591 test->flags |= ACL_TEST_F_VOL_HDR;
7592 return 0;
7593}
7594
7595static int
7596acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7597 struct acl_expr *expr, struct acl_test *test)
7598{
7599 struct http_txn *txn = l7;
7600
7601 if (!txn)
7602 return 0;
7603
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7604 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7605 return 0;
7606
7607 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7608 /* ensure the indexes are not affected */
7609 return 0;
7610
7611 return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
7612}
7613
7614static int
7615acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7616 struct acl_expr *expr, struct acl_test *test)
7617{
7618 struct http_txn *txn = l7;
7619
7620 if (!txn)
7621 return 0;
7622
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7623 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7624 return 0;
7625
7626 return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
7627}
7628
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7629/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
7630 * the first '/' after the possible hostname, and ends before the possible '?'.
7631 */
7632static int
7633acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
7634 struct acl_expr *expr, struct acl_test *test)
7635{
7636 struct http_txn *txn = l7;
7637 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7638
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7639 if (!txn)
7640 return 0;
7641
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7642 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7643 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7644
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7645 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7646 /* ensure the indexes are not affected */
7647 return 0;
7648
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7649 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]7650 ptr = http_get_path(txn);
7651 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7652 return 0;
7653
7654 /* OK, we got the '/' ! */
7655 test->ptr = ptr;
7656
7657 while (ptr < end && *ptr != '?')
7658 ptr++;
7659
7660 test->len = ptr - test->ptr;
7661
7662 /* we do not need to set READ_ONLY because the data is in a buffer */
7663 test->flags = ACL_TEST_F_VOL_1ST;
7664 return 1;
7665}
7666
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7667static int
7668acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
7669 struct acl_expr *expr, struct acl_test *test)
7670{
7671 struct buffer *req = s->req;
7672 struct http_txn *txn = &s->txn;
7673 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7674
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7675 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
7676 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
7677 */
7678
7679 if (!s || !req)
7680 return 0;
7681
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7682 if (unlikely(msg->msg_state >= HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7683 /* Already decoded as OK */
7684 test->flags |= ACL_TEST_F_SET_RES_PASS;
7685 return 1;
7686 }
7687
7688 /* Try to decode HTTP request */
7689 if (likely(req->lr < req->r))
7690 http_msg_analyzer(req, msg, &txn->hdr_idx);
7691
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7692 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7693 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
7694 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7695 return 1;
7696 }
7697 /* wait for final state */
7698 test->flags |= ACL_TEST_F_MAY_CHANGE;
7699 return 0;
7700 }
7701
7702 /* OK we got a valid HTTP request. We have some minor preparation to
7703 * perform so that further checks can rely on HTTP tests.
7704 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7705 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7706 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
7707 s->flags |= SN_REDIRECTABLE;
7708
7709 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
7710 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7711 return 1;
7712 }
7713
7714 test->flags |= ACL_TEST_F_SET_RES_PASS;
7715 return 1;
7716}
7717
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7718static int
7719acl_fetch_http_auth(struct proxy *px, struct session *s, void *l7, int dir,
7720 struct acl_expr *expr, struct acl_test *test)
7721{
7722
7723 if (!s)
7724 return 0;
7725
7726 if (!get_http_auth(s))
7727 return 0;
7728
7729 test->ctx.a[0] = expr->arg.ul;
7730 test->ctx.a[1] = s->txn.auth.user;
7731 test->ctx.a[2] = s->txn.auth.pass;
7732
7733 test->flags |= ACL_TEST_F_READ_ONLY | ACL_TEST_F_NULL_MATCH;
7734
7735 return 1;
7736}
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7737
7738/************************************************************************/
7739/* All supported keywords must be declared here. */
7740/************************************************************************/
7741
7742/* Note: must not be declared <const> as its list will be overwritten */
7743static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7744 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
7745
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]7746 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]7747 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP },
7748 { "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]7749 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7750
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]7751 { "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]7752 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
7753 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
7754 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
7755 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
7756 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
7757 { "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]7758 { "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]7759 { "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]7760
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]7761 /* 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]7762 { "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]7763 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
7764 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
7765 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
7766 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
7767 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
7768 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
7769 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
7770 { "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]7771 { "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]7772
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]7773 { "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]7774 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
7775 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
7776 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
7777 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
7778 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
7779 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
7780 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
7781 { "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]7782 { "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]7783
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]7784 { "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]7785 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
7786 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
7787 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
7788 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
7789 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
7790 { "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]7791
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]7792#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7793 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
7794 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
7795 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
7796 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
7797 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
7798 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
7799 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
7800
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7801 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
7802 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
7803 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
7804 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
7805 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
7806 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
7807 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
7808 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7809#endif
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7810
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7811 { "http_auth", acl_parse_nothing, acl_fetch_http_auth, acl_match_auth },
7812 { "http_auth_group", acl_parse_strcat, acl_fetch_http_auth, acl_match_auth },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7813 { NULL, NULL, NULL, NULL },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7814}};
7815
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]7816/************************************************************************/
7817/* The code below is dedicated to pattern fetching and matching */
7818/************************************************************************/
7819
7820/* extract the IP address from the last occurrence of specified header. Note
7821 * that we should normally first extract the string then convert it to IP,
7822 * but right now we have all the functions to do this seemlessly, and we will
7823 * be able to change that later without touching the configuration.
7824 */
7825static int
7826pattern_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7827 const char *arg, int arg_len, union pattern_data *data)
7828{
7829 struct http_txn *txn = l7;
7830
7831 data->ip.s_addr = htonl(get_ip_from_hdr2(&txn->req, arg, arg_len, &txn->hdr_idx, -1));
7832 return data->ip.s_addr != 0;
7833}
7834
7835/************************************************************************/
7836/* All supported keywords must be declared here. */
7837/************************************************************************/
7838/* Note: must not be declared <const> as its list will be overwritten */
7839static struct pattern_fetch_kw_list pattern_fetch_keywords = {{ },{
7840 { "hdr", pattern_fetch_hdr_ip, PATTERN_TYPE_IP, PATTERN_FETCH_REQ },
7841 { NULL, NULL, 0, 0 },
7842}};
7843
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7844
7845__attribute__((constructor))
7846static void __http_protocol_init(void)
7847{
7848 acl_register_keywords(&acl_kws);
Willy Tarreau4a568972010-05-12 08:08:50 +0200[diff] [blame]7849 pattern_register_fetches(&pattern_fetch_keywords);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7850}
7851
7852
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7853/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]7854 * Local variables:
7855 * c-indent-level: 8
7856 * c-basic-offset: 8
7857 * End:
7858 */