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git01.mediatek.com / haproxy / d9b587f260b99045bce95b34cbe4c1cee7081262 / . / src / proto_http.c
blob: 0820be5bd470abf674d42b61f7fad1129a6fb1cf [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>
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]47#include <proto/client.h>
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]48#include <proto/dumpstats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]49#include <proto/fd.h>
50#include <proto/log.h>
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]51#include <proto/hdr_idx.h>
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]52#include <proto/proto_tcp.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]53#include <proto/proto_http.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]54#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]55#include <proto/queue.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]56#include <proto/server.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]57#include <proto/session.h>
Willy Tarreaucff64112008-11-03 06:26:53 +0100[diff] [blame]58#include <proto/stream_interface.h>
Willy Tarreau2d212792008-08-27 21:41:35 +0200[diff] [blame]59#include <proto/stream_sock.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]60#include <proto/task.h>
61
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]62const char HTTP_100[] =
63 "HTTP/1.1 100 Continue\r\n\r\n";
64
65const struct chunk http_100_chunk = {
66 .str = (char *)&HTTP_100,
67 .len = sizeof(HTTP_100)-1
68};
69
Willy Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]70/* This is used by remote monitoring */
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]71const char HTTP_200[] =
Willy Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]72 "HTTP/1.0 200 OK\r\n"
73 "Cache-Control: no-cache\r\n"
74 "Connection: close\r\n"
75 "Content-Type: text/html\r\n"
76 "\r\n"
77 "<html><body><h1>200 OK</h1>\nHAProxy: service ready.\n</body></html>\n";
78
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]79const struct chunk http_200_chunk = {
80 .str = (char *)&HTTP_200,
81 .len = sizeof(HTTP_200)-1
82};
83
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]84/* Warning: no "connection" header is provided with the 3xx messages below */
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]85const char *HTTP_301 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]86 "HTTP/1.1 301 Moved Permanently\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]87 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]88 "Content-length: 0\r\n"
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]89 "Location: "; /* not terminated since it will be concatenated with the URL */
90
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]91const char *HTTP_302 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]92 "HTTP/1.1 302 Found\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]93 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]94 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]95 "Location: "; /* not terminated since it will be concatenated with the URL */
96
97/* same as 302 except that the browser MUST retry with the GET method */
98const char *HTTP_303 =
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]99 "HTTP/1.1 303 See Other\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]100 "Cache-Control: no-cache\r\n"
Willy Tarreaubc5aa192010-01-03 15:09:36 +0100[diff] [blame]101 "Content-length: 0\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]102 "Location: "; /* not terminated since it will be concatenated with the URL */
103
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]104/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
105const char *HTTP_401_fmt =
106 "HTTP/1.0 401 Unauthorized\r\n"
107 "Cache-Control: no-cache\r\n"
108 "Connection: close\r\n"
Willy Tarreau791d66d2006-07-08 16:53:38 +0200[diff] [blame]109 "Content-Type: text/html\r\n"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]110 "WWW-Authenticate: Basic realm=\"%s\"\r\n"
111 "\r\n"
112 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
113
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]114const char *HTTP_407_fmt =
115 "HTTP/1.0 407 Unauthorized\r\n"
116 "Cache-Control: no-cache\r\n"
117 "Connection: close\r\n"
118 "Content-Type: text/html\r\n"
119 "Proxy-Authenticate: Basic realm=\"%s\"\r\n"
120 "\r\n"
121 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
122
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]123
124const int http_err_codes[HTTP_ERR_SIZE] = {
125 [HTTP_ERR_400] = 400,
126 [HTTP_ERR_403] = 403,
127 [HTTP_ERR_408] = 408,
128 [HTTP_ERR_500] = 500,
129 [HTTP_ERR_502] = 502,
130 [HTTP_ERR_503] = 503,
131 [HTTP_ERR_504] = 504,
132};
133
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]134static const char *http_err_msgs[HTTP_ERR_SIZE] = {
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]135 [HTTP_ERR_400] =
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]136 "HTTP/1.0 400 Bad request\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]137 "Cache-Control: no-cache\r\n"
138 "Connection: close\r\n"
139 "Content-Type: text/html\r\n"
140 "\r\n"
141 "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
142
143 [HTTP_ERR_403] =
144 "HTTP/1.0 403 Forbidden\r\n"
145 "Cache-Control: no-cache\r\n"
146 "Connection: close\r\n"
147 "Content-Type: text/html\r\n"
148 "\r\n"
149 "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
150
151 [HTTP_ERR_408] =
152 "HTTP/1.0 408 Request Time-out\r\n"
153 "Cache-Control: no-cache\r\n"
154 "Connection: close\r\n"
155 "Content-Type: text/html\r\n"
156 "\r\n"
157 "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
158
159 [HTTP_ERR_500] =
160 "HTTP/1.0 500 Server Error\r\n"
161 "Cache-Control: no-cache\r\n"
162 "Connection: close\r\n"
163 "Content-Type: text/html\r\n"
164 "\r\n"
165 "<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
166
167 [HTTP_ERR_502] =
168 "HTTP/1.0 502 Bad Gateway\r\n"
169 "Cache-Control: no-cache\r\n"
170 "Connection: close\r\n"
171 "Content-Type: text/html\r\n"
172 "\r\n"
173 "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
174
175 [HTTP_ERR_503] =
176 "HTTP/1.0 503 Service Unavailable\r\n"
177 "Cache-Control: no-cache\r\n"
178 "Connection: close\r\n"
179 "Content-Type: text/html\r\n"
180 "\r\n"
181 "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
182
183 [HTTP_ERR_504] =
184 "HTTP/1.0 504 Gateway Time-out\r\n"
185 "Cache-Control: no-cache\r\n"
186 "Connection: close\r\n"
187 "Content-Type: text/html\r\n"
188 "\r\n"
189 "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
190
191};
192
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]193/* We must put the messages here since GCC cannot initialize consts depending
194 * on strlen().
195 */
196struct chunk http_err_chunks[HTTP_ERR_SIZE];
197
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]198#define FD_SETS_ARE_BITFIELDS
199#ifdef FD_SETS_ARE_BITFIELDS
200/*
201 * This map is used with all the FD_* macros to check whether a particular bit
202 * is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
203 * which should be encoded. When FD_ISSET() returns non-zero, it means that the
204 * byte should be encoded. Be careful to always pass bytes from 0 to 255
205 * exclusively to the macros.
206 */
207fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
208fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
209
210#else
211#error "Check if your OS uses bitfields for fd_sets"
212#endif
213
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]214void init_proto_http()
215{
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]216 int i;
217 char *tmp;
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]218 int msg;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]219
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]220 for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
221 if (!http_err_msgs[msg]) {
222 Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
223 abort();
224 }
225
226 http_err_chunks[msg].str = (char *)http_err_msgs[msg];
227 http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
228 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]229
230 /* initialize the log header encoding map : '{|}"#' should be encoded with
231 * '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
232 * URL encoding only requires '"', '#' to be encoded as well as non-
233 * printable characters above.
234 */
235 memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
236 memset(url_encode_map, 0, sizeof(url_encode_map));
237 for (i = 0; i < 32; i++) {
238 FD_SET(i, hdr_encode_map);
239 FD_SET(i, url_encode_map);
240 }
241 for (i = 127; i < 256; i++) {
242 FD_SET(i, hdr_encode_map);
243 FD_SET(i, url_encode_map);
244 }
245
246 tmp = "\"#{|}";
247 while (*tmp) {
248 FD_SET(*tmp, hdr_encode_map);
249 tmp++;
250 }
251
252 tmp = "\"#";
253 while (*tmp) {
254 FD_SET(*tmp, url_encode_map);
255 tmp++;
256 }
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]257
258 /* memory allocations */
259 pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]260 pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]261}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]262
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]263/*
264 * We have 26 list of methods (1 per first letter), each of which can have
265 * up to 3 entries (2 valid, 1 null).
266 */
267struct http_method_desc {
268 http_meth_t meth;
269 int len;
270 const char text[8];
271};
272
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]273const struct http_method_desc http_methods[26][3] = {
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]274 ['C' - 'A'] = {
275 [0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
276 },
277 ['D' - 'A'] = {
278 [0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
279 },
280 ['G' - 'A'] = {
281 [0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
282 },
283 ['H' - 'A'] = {
284 [0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
285 },
286 ['P' - 'A'] = {
287 [0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
288 [1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
289 },
290 ['T' - 'A'] = {
291 [0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
292 },
293 /* rest is empty like this :
294 * [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
295 */
296};
297
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]298/* 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]299 * table than to perform a boolean AND or OR between two tests. Refer to
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]300 * RFC2616 for those chars.
301 */
302
303const char http_is_spht[256] = {
304 [' '] = 1, ['\t'] = 1,
305};
306
307const char http_is_crlf[256] = {
308 ['\r'] = 1, ['\n'] = 1,
309};
310
311const char http_is_lws[256] = {
312 [' '] = 1, ['\t'] = 1,
313 ['\r'] = 1, ['\n'] = 1,
314};
315
316const char http_is_sep[256] = {
317 ['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
318 ['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
319 ['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
320 ['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
321 [' '] = 1, ['\t'] = 1, ['\\'] = 1,
322};
323
324const char http_is_ctl[256] = {
325 [0 ... 31] = 1,
326 [127] = 1,
327};
328
329/*
330 * A token is any ASCII char that is neither a separator nor a CTL char.
331 * Do not overwrite values in assignment since gcc-2.95 will not handle
332 * them correctly. Instead, define every non-CTL char's status.
333 */
334const char http_is_token[256] = {
335 [' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
336 ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
337 ['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
338 [','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
339 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
340 ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
341 ['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
342 ['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
343 ['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
344 ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
345 ['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
346 ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
347 ['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
348 ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
349 ['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
350 ['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
351 ['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
352 ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
353 ['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
354 ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
355 ['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
356 ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
357 ['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
358 ['|'] = 1, ['}'] = 0, ['~'] = 1,
359};
360
361
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]362/*
363 * An http ver_token is any ASCII which can be found in an HTTP version,
364 * which includes 'H', 'T', 'P', '/', '.' and any digit.
365 */
366const char http_is_ver_token[256] = {
367 ['.'] = 1, ['/'] = 1,
368 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
369 ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
370 ['H'] = 1, ['P'] = 1, ['T'] = 1,
371};
372
373
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]374/*
Willy Tarreaue988a792010-01-04 21:13:14 +0100[diff] [blame]375 * Silent debug that outputs only in strace, using fd #-1. Trash is modified.
376 */
377#if defined(DEBUG_FSM)
378static void http_silent_debug(int line, struct session *s)
379{
380 int size = 0;
381 size += snprintf(trash + size, sizeof(trash) - size,
382 "[%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",
383 line,
384 s->si[0].state, s->si[0].fd, s->txn.req.msg_state, s->req->flags, s->req->analysers,
385 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);
386 write(-1, trash, size);
387 size = 0;
388 size += snprintf(trash + size, sizeof(trash) - size,
389 " %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",
390 line,
391 s->si[1].state, s->si[1].fd, s->txn.rsp.msg_state, s->rep->flags, s->rep->analysers,
392 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);
393
394 write(-1, trash, size);
395}
396#else
397#define http_silent_debug(l,s) do { } while (0)
398#endif
399
400/*
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]401 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
402 * CRLF. Text length is measured first, so it cannot be NULL.
403 * The header is also automatically added to the index <hdr_idx>, and the end
404 * of headers is automatically adjusted. The number of bytes added is returned
405 * on success, otherwise <0 is returned indicating an error.
406 */
407int http_header_add_tail(struct buffer *b, struct http_msg *msg,
408 struct hdr_idx *hdr_idx, const char *text)
409{
410 int bytes, len;
411
412 len = strlen(text);
413 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
414 if (!bytes)
415 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]416 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]417 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
418}
419
420/*
421 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
422 * CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
423 * the buffer is only opened and the space reserved, but nothing is copied.
424 * The header is also automatically added to the index <hdr_idx>, and the end
425 * of headers is automatically adjusted. The number of bytes added is returned
426 * on success, otherwise <0 is returned indicating an error.
427 */
428int http_header_add_tail2(struct buffer *b, struct http_msg *msg,
429 struct hdr_idx *hdr_idx, const char *text, int len)
430{
431 int bytes;
432
433 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
434 if (!bytes)
435 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]436 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]437 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
438}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]439
440/*
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]441 * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
442 * If so, returns the position of the first non-space character relative to
443 * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
444 * to return a pointer to the place after the first space. Returns 0 if the
445 * header name does not match. Checks are case-insensitive.
446 */
447int http_header_match2(const char *hdr, const char *end,
448 const char *name, int len)
449{
450 const char *val;
451
452 if (hdr + len >= end)
453 return 0;
454 if (hdr[len] != ':')
455 return 0;
456 if (strncasecmp(hdr, name, len) != 0)
457 return 0;
458 val = hdr + len + 1;
459 while (val < end && HTTP_IS_SPHT(*val))
460 val++;
461 if ((val >= end) && (len + 2 <= end - hdr))
462 return len + 2; /* we may replace starting from second space */
463 return val - hdr;
464}
465
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]466/* Find the end of the header value contained between <s> and <e>. See RFC2616,
467 * par 2.2 for more information. Note that it requires a valid header to return
468 * a valid result. This works for headers defined as comma-separated lists.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]469 */
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]470char *find_hdr_value_end(char *s, const char *e)
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]471{
472 int quoted, qdpair;
473
474 quoted = qdpair = 0;
475 for (; s < e; s++) {
476 if (qdpair) qdpair = 0;
477 else if (quoted && *s == '\\') qdpair = 1;
478 else if (quoted && *s == '"') quoted = 0;
479 else if (*s == '"') quoted = 1;
480 else if (*s == ',') return s;
481 }
482 return s;
483}
484
485/* Find the first or next occurrence of header <name> in message buffer <sol>
486 * using headers index <idx>, and return it in the <ctx> structure. This
487 * structure holds everything necessary to use the header and find next
488 * occurrence. If its <idx> member is 0, the header is searched from the
489 * beginning. Otherwise, the next occurrence is returned. The function returns
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]490 * 1 when it finds a value, and 0 when there is no more. It is designed to work
491 * with headers defined as comma-separated lists. As a special case, if ctx->val
492 * is NULL when searching for a new values of a header, the current header is
493 * rescanned. This allows rescanning after a header deletion.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]494 */
495int http_find_header2(const char *name, int len,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]496 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]497 struct hdr_ctx *ctx)
498{
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]499 char *eol, *sov;
500 int cur_idx, old_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]501
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]502 cur_idx = ctx->idx;
503 if (cur_idx) {
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]504 /* We have previously returned a value, let's search
505 * another one on the same line.
506 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]507 sol = ctx->line;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]508 ctx->del = ctx->val + ctx->vlen;
509 sov = sol + ctx->del;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]510 eol = sol + idx->v[cur_idx].len;
511
512 if (sov >= eol)
513 /* no more values in this header */
514 goto next_hdr;
515
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]516 /* values remaining for this header, skip the comma but save it
517 * for later use (eg: for header deletion).
518 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]519 sov++;
520 while (sov < eol && http_is_lws[(unsigned char)*sov])
521 sov++;
522
523 goto return_hdr;
524 }
525
526 /* first request for this header */
527 sol += hdr_idx_first_pos(idx);
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]528 old_idx = 0;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]529 cur_idx = hdr_idx_first_idx(idx);
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]530 while (cur_idx) {
531 eol = sol + idx->v[cur_idx].len;
532
Willy Tarreau1ad7c6d2007-06-10 21:42:55 +0200[diff] [blame]533 if (len == 0) {
534 /* No argument was passed, we want any header.
535 * To achieve this, we simply build a fake request. */
536 while (sol + len < eol && sol[len] != ':')
537 len++;
538 name = sol;
539 }
540
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]541 if ((len < eol - sol) &&
542 (sol[len] == ':') &&
543 (strncasecmp(sol, name, len) == 0)) {
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]544 ctx->del = len;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]545 sov = sol + len + 1;
546 while (sov < eol && http_is_lws[(unsigned char)*sov])
547 sov++;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]548
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]549 ctx->line = sol;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]550 ctx->prev = old_idx;
551 return_hdr:
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]552 ctx->idx = cur_idx;
553 ctx->val = sov - sol;
554
555 eol = find_hdr_value_end(sov, eol);
556 ctx->vlen = eol - sov;
557 return 1;
558 }
559 next_hdr:
560 sol = eol + idx->v[cur_idx].cr + 1;
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]561 old_idx = cur_idx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]562 cur_idx = idx->v[cur_idx].next;
563 }
564 return 0;
565}
566
567int http_find_header(const char *name,
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]568 char *sol, struct hdr_idx *idx,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]569 struct hdr_ctx *ctx)
570{
571 return http_find_header2(name, strlen(name), sol, idx, ctx);
572}
573
Willy Tarreau68085d82010-01-18 14:54:04 +0100[diff] [blame]574/* Remove one value of a header. This only works on a <ctx> returned by one of
575 * the http_find_header functions. The value is removed, as well as surrounding
576 * commas if any. If the removed value was alone, the whole header is removed.
577 * The ctx is always updated accordingly, as well as buffer <buf> and HTTP
578 * message <msg>. The new index is returned. If it is zero, it means there is
579 * no more header, so any processing may stop. The ctx is always left in a form
580 * that can be handled by http_find_header2() to find next occurrence.
581 */
582int http_remove_header2(struct http_msg *msg, struct buffer *buf,
583 struct hdr_idx *idx, struct hdr_ctx *ctx)
584{
585 int cur_idx = ctx->idx;
586 char *sol = ctx->line;
587 struct hdr_idx_elem *hdr;
588 int delta, skip_comma;
589
590 if (!cur_idx)
591 return 0;
592
593 hdr = &idx->v[cur_idx];
594 if (sol[ctx->del] == ':' && ctx->val + ctx->vlen == hdr->len) {
595 /* This was the only value of the header, we must now remove it entirely. */
596 delta = buffer_replace2(buf, sol, sol + hdr->len + hdr->cr + 1, NULL, 0);
597 http_msg_move_end(msg, delta);
598 idx->used--;
599 hdr->len = 0; /* unused entry */
600 idx->v[ctx->prev].next = idx->v[ctx->idx].next;
601 ctx->idx = ctx->prev; /* walk back to the end of previous header */
602 ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1;
603 ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */
604 ctx->vlen = 0;
605 return ctx->idx;
606 }
607
608 /* This was not the only value of this header. We have to remove between
609 * ctx->del+1 and ctx->val+ctx->vlen+1 included. If it is the last entry
610 * of the list, we remove the last separator.
611 */
612
613 skip_comma = (ctx->val + ctx->vlen == hdr->len) ? 0 : 1;
614 delta = buffer_replace2(buf, sol + ctx->del + skip_comma,
615 sol + ctx->val + ctx->vlen + skip_comma,
616 NULL, 0);
617 hdr->len += delta;
618 http_msg_move_end(msg, delta);
619 ctx->val = ctx->del;
620 ctx->vlen = 0;
621 return ctx->idx;
622}
623
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]624/* This function handles a server error at the stream interface level. The
625 * stream interface is assumed to be already in a closed state. An optional
626 * message is copied into the input buffer, and an HTTP status code stored.
627 * The error flags are set to the values in arguments. Any pending request
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]628 * in this buffer will be lost.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]629 */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]630static void http_server_error(struct session *t, struct stream_interface *si,
631 int err, int finst, int status, const struct chunk *msg)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]632{
Willy Tarreaud5fd51c2010-01-22 14:17:47 +0100[diff] [blame]633 buffer_auto_read(si->ob);
634 buffer_abort(si->ob);
635 buffer_auto_close(si->ob);
636 buffer_erase(si->ob);
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]637 buffer_auto_close(si->ib);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]638 buffer_auto_read(si->ib);
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]639 if (status > 0 && msg) {
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]640 t->txn.status = status;
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]641 buffer_write(si->ib, msg->str, msg->len);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]642 }
643 if (!(t->flags & SN_ERR_MASK))
644 t->flags |= err;
645 if (!(t->flags & SN_FINST_MASK))
646 t->flags |= finst;
647}
648
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]649/* This function returns the appropriate error location for the given session
650 * and message.
651 */
652
653struct chunk *error_message(struct session *s, int msgnum)
654{
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]655 if (s->be->errmsg[msgnum].str)
656 return &s->be->errmsg[msgnum];
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]657 else if (s->fe->errmsg[msgnum].str)
658 return &s->fe->errmsg[msgnum];
659 else
660 return &http_err_chunks[msgnum];
661}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]662
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]663/*
664 * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
665 * string), HTTP_METH_OTHER for unknown methods, or the identified method.
666 */
667static http_meth_t find_http_meth(const char *str, const int len)
668{
669 unsigned char m;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]670 const struct http_method_desc *h;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]671
672 m = ((unsigned)*str - 'A');
673
674 if (m < 26) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]675 for (h = http_methods[m]; h->len > 0; h++) {
676 if (unlikely(h->len != len))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]677 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]678 if (likely(memcmp(str, h->text, h->len) == 0))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]679 return h->meth;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]680 };
681 return HTTP_METH_OTHER;
682 }
683 return HTTP_METH_NONE;
684
685}
686
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]687/* Parse the URI from the given transaction (which is assumed to be in request
688 * phase) and look for the "/" beginning the PATH. If not found, return NULL.
689 * It is returned otherwise.
690 */
691static char *
692http_get_path(struct http_txn *txn)
693{
694 char *ptr, *end;
695
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]696 ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]697 end = ptr + txn->req.sl.rq.u_l;
698
699 if (ptr >= end)
700 return NULL;
701
702 /* RFC2616, par. 5.1.2 :
703 * Request-URI = "*" | absuri | abspath | authority
704 */
705
706 if (*ptr == '*')
707 return NULL;
708
709 if (isalpha((unsigned char)*ptr)) {
710 /* this is a scheme as described by RFC3986, par. 3.1 */
711 ptr++;
712 while (ptr < end &&
713 (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
714 ptr++;
715 /* skip '://' */
716 if (ptr == end || *ptr++ != ':')
717 return NULL;
718 if (ptr == end || *ptr++ != '/')
719 return NULL;
720 if (ptr == end || *ptr++ != '/')
721 return NULL;
722 }
723 /* skip [user[:passwd]@]host[:[port]] */
724
725 while (ptr < end && *ptr != '/')
726 ptr++;
727
728 if (ptr == end)
729 return NULL;
730
731 /* OK, we got the '/' ! */
732 return ptr;
733}
734
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]735/* Returns a 302 for a redirectable request. This may only be called just after
736 * the stream interface has moved to SI_ST_ASS. Unprocessable requests are
737 * left unchanged and will follow normal proxy processing.
738 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]739void perform_http_redirect(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]740{
741 struct http_txn *txn;
742 struct chunk rdr;
743 char *path;
744 int len;
745
746 /* 1: create the response header */
747 rdr.len = strlen(HTTP_302);
748 rdr.str = trash;
Willy Tarreau59e0b0f2010-01-09 21:29:23 +0100[diff] [blame]749 rdr.size = sizeof(trash);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]750 memcpy(rdr.str, HTTP_302, rdr.len);
751
752 /* 2: add the server's prefix */
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]753 if (rdr.len + s->srv->rdr_len > rdr.size)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]754 return;
755
Willy Tarreaudcb75c42010-01-10 00:24:22 +0100[diff] [blame]756 /* special prefix "/" means don't change URL */
757 if (s->srv->rdr_len != 1 || *s->srv->rdr_pfx != '/') {
758 memcpy(rdr.str + rdr.len, s->srv->rdr_pfx, s->srv->rdr_len);
759 rdr.len += s->srv->rdr_len;
760 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]761
762 /* 3: add the request URI */
763 txn = &s->txn;
764 path = http_get_path(txn);
765 if (!path)
766 return;
767
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]768 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]769 if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]770 return;
771
772 memcpy(rdr.str + rdr.len, path, len);
773 rdr.len += len;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]774
775 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
776 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
777 rdr.len += 29;
778 } else {
779 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
780 rdr.len += 23;
781 }
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]782
783 /* prepare to return without error. */
Willy Tarreau99126c32008-11-27 10:30:51 +0100[diff] [blame]784 si->shutr(si);
785 si->shutw(si);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]786 si->err_type = SI_ET_NONE;
787 si->err_loc = NULL;
788 si->state = SI_ST_CLO;
789
790 /* send the message */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]791 http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]792
793 /* FIXME: we should increase a counter of redirects per server and per backend. */
794 if (s->srv)
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]795 srv_inc_sess_ctr(s->srv);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]796}
797
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]798/* Return the error message corresponding to si->err_type. It is assumed
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]799 * that the server side is closed. Note that err_type is actually a
800 * bitmask, where almost only aborts may be cumulated with other
801 * values. We consider that aborted operations are more important
802 * than timeouts or errors due to the fact that nobody else in the
803 * logs might explain incomplete retries. All others should avoid
804 * being cumulated. It should normally not be possible to have multiple
805 * aborts at once, but just in case, the first one in sequence is reported.
806 */
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]807void http_return_srv_error(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]808{
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]809 int err_type = si->err_type;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]810
811 if (err_type & SI_ET_QUEUE_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]812 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
813 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]814 else if (err_type & SI_ET_CONN_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]815 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
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_QUEUE_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]818 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
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_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]821 http_server_error(s, si, SN_ERR_SRVCL, 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_CONN_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]824 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
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_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]827 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
828 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]829 else /* SI_ET_CONN_OTHER and others */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]830 http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
831 500, error_message(s, HTTP_ERR_500));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]832}
833
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]834extern const char sess_term_cond[8];
835extern const char sess_fin_state[8];
836extern const char *monthname[12];
837const char sess_cookie[4] = "NIDV"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie */
838const char sess_set_cookie[8] = "N1I3PD5R"; /* No set-cookie, unknown, Set-Cookie Inserted, unknown,
839 Set-cookie seen and left unchanged (passive), Set-cookie Deleted,
840 unknown, Set-cookie Rewritten */
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]841struct pool_head *pool2_requri;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]842struct pool_head *pool2_capture;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]843
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]844void http_sess_clflog(struct session *s)
845{
846 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
847 struct proxy *fe = s->fe;
848 struct proxy *be = s->be;
849 struct proxy *prx_log;
850 struct http_txn *txn = &s->txn;
851 int tolog, level, err;
852 char *uri, *h;
853 char *svid;
854 struct tm tm;
855 static char tmpline[MAX_SYSLOG_LEN];
856 int hdr;
857 size_t w;
858 int t_request;
859
860 prx_log = fe;
861 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
862 (s->conn_retries != be->conn_retries) ||
863 txn->status >= 500;
864
865 if (s->cli_addr.ss_family == AF_INET)
866 inet_ntop(AF_INET,
867 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
868 pn, sizeof(pn));
869 else
870 inet_ntop(AF_INET6,
871 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
872 pn, sizeof(pn));
873
874 get_gmtime(s->logs.accept_date.tv_sec, &tm);
875
876 /* FIXME: let's limit ourselves to frontend logging for now. */
877 tolog = fe->to_log;
878
879 h = tmpline;
880
881 w = snprintf(h, sizeof(tmpline),
882 "%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
883 pn,
884 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
885 tm.tm_hour, tm.tm_min, tm.tm_sec);
886 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
887 goto trunc;
888 h += w;
889
890 if (h >= tmpline + sizeof(tmpline) - 4)
891 goto trunc;
892
893 *(h++) = ' ';
894 *(h++) = '\"';
895 uri = txn->uri ? txn->uri : "<BADREQ>";
896 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
897 '#', url_encode_map, uri);
898 *(h++) = '\"';
899
900 w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
901 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
902 goto trunc;
903 h += w;
904
905 if (h >= tmpline + sizeof(tmpline) - 9)
906 goto trunc;
907 memcpy(h, " \"-\" \"-\"", 8);
908 h += 8;
909
910 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
911 " %d %03d",
912 (s->cli_addr.ss_family == AF_INET) ?
913 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
914 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
915 (int)s->logs.accept_date.tv_usec/1000);
916 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
917 goto trunc;
918 h += w;
919
920 w = strlen(fe->id);
921 if (h >= tmpline + sizeof(tmpline) - 4 - w)
922 goto trunc;
923 *(h++) = ' ';
924 *(h++) = '\"';
925 memcpy(h, fe->id, w);
926 h += w;
927 *(h++) = '\"';
928
929 w = strlen(be->id);
930 if (h >= tmpline + sizeof(tmpline) - 4 - w)
931 goto trunc;
932 *(h++) = ' ';
933 *(h++) = '\"';
934 memcpy(h, be->id, w);
935 h += w;
936 *(h++) = '\"';
937
938 svid = (tolog & LW_SVID) ?
939 (s->data_source != DATA_SRC_STATS) ?
940 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
941
942 w = strlen(svid);
943 if (h >= tmpline + sizeof(tmpline) - 4 - w)
944 goto trunc;
945 *(h++) = ' ';
946 *(h++) = '\"';
947 memcpy(h, svid, w);
948 h += w;
949 *(h++) = '\"';
950
951 t_request = -1;
952 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
953 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
954 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
955 " %d %ld %ld %ld %ld",
956 t_request,
957 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
958 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
959 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
960 s->logs.t_close);
961 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
962 goto trunc;
963 h += w;
964
965 if (h >= tmpline + sizeof(tmpline) - 8)
966 goto trunc;
967 *(h++) = ' ';
968 *(h++) = '\"';
969 *(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
970 *(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
971 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
972 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
973 *(h++) = '\"';
974
975 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
976 " %d %d %d %d %d %ld %ld",
977 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
978 (s->conn_retries > 0) ? (be->conn_retries - s->conn_retries) : be->conn_retries,
979 s->logs.srv_queue_size, s->logs.prx_queue_size);
980
981 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
982 goto trunc;
983 h += w;
984
985 if (txn->cli_cookie) {
986 w = strlen(txn->cli_cookie);
987 if (h >= tmpline + sizeof(tmpline) - 4 - w)
988 goto trunc;
989 *(h++) = ' ';
990 *(h++) = '\"';
991 memcpy(h, txn->cli_cookie, w);
992 h += w;
993 *(h++) = '\"';
994 } else {
995 if (h >= tmpline + sizeof(tmpline) - 5)
996 goto trunc;
997 memcpy(h, " \"-\"", 4);
998 h += 4;
999 }
1000
1001 if (txn->srv_cookie) {
1002 w = strlen(txn->srv_cookie);
1003 if (h >= tmpline + sizeof(tmpline) - 4 - w)
1004 goto trunc;
1005 *(h++) = ' ';
1006 *(h++) = '\"';
1007 memcpy(h, txn->srv_cookie, w);
1008 h += w;
1009 *(h++) = '\"';
1010 } else {
1011 if (h >= tmpline + sizeof(tmpline) - 5)
1012 goto trunc;
1013 memcpy(h, " \"-\"", 4);
1014 h += 4;
1015 }
1016
1017 if ((fe->to_log & LW_REQHDR) && txn->req.cap) {
1018 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1019 if (h >= sizeof (tmpline) + tmpline - 4)
1020 goto trunc;
1021 *(h++) = ' ';
1022 *(h++) = '\"';
1023 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1024 '#', hdr_encode_map, txn->req.cap[hdr]);
1025 *(h++) = '\"';
1026 }
1027 }
1028
1029 if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) {
1030 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1031 if (h >= sizeof (tmpline) + tmpline - 4)
1032 goto trunc;
1033 *(h++) = ' ';
1034 *(h++) = '\"';
1035 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
1036 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1037 *(h++) = '\"';
1038 }
1039 }
1040
1041trunc:
1042 *h = '\0';
1043
1044 level = LOG_INFO;
1045 if (err && (fe->options2 & PR_O2_LOGERRORS))
1046 level = LOG_ERR;
1047
1048 send_log(prx_log, level, "%s\n", tmpline);
1049
1050 s->logs.logwait = 0;
1051}
1052
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1053/*
1054 * send a log for the session when we have enough info about it.
1055 * Will not log if the frontend has no log defined.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1056 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]1057void http_sess_log(struct session *s)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1058{
1059 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
1060 struct proxy *fe = s->fe;
1061 struct proxy *be = s->be;
1062 struct proxy *prx_log;
1063 struct http_txn *txn = &s->txn;
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1064 int tolog, level, err;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1065 char *uri, *h;
1066 char *svid;
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1067 struct tm tm;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1068 static char tmpline[MAX_SYSLOG_LEN];
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1069 int t_request;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1070 int hdr;
1071
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1072 /* if we don't want to log normal traffic, return now */
1073 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
1074 (s->conn_retries != be->conn_retries) ||
1075 txn->status >= 500;
1076 if (!err && (fe->options2 & PR_O2_NOLOGNORM))
1077 return;
1078
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1079 if (fe->logfac1 < 0 && fe->logfac2 < 0)
1080 return;
1081 prx_log = fe;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1082
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]1083 if (prx_log->options2 & PR_O2_CLFLOG)
1084 return http_sess_clflog(s);
1085
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1086 if (s->cli_addr.ss_family == AF_INET)
1087 inet_ntop(AF_INET,
1088 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
1089 pn, sizeof(pn));
1090 else
1091 inet_ntop(AF_INET6,
1092 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
1093 pn, sizeof(pn));
1094
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200[diff] [blame]1095 get_localtime(s->logs.accept_date.tv_sec, &tm);
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1096
1097 /* FIXME: let's limit ourselves to frontend logging for now. */
1098 tolog = fe->to_log;
1099
1100 h = tmpline;
1101 if (fe->to_log & LW_REQHDR &&
1102 txn->req.cap &&
1103 (h < tmpline + sizeof(tmpline) - 10)) {
1104 *(h++) = ' ';
1105 *(h++) = '{';
1106 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
1107 if (hdr)
1108 *(h++) = '|';
1109 if (txn->req.cap[hdr] != NULL)
1110 h = encode_string(h, tmpline + sizeof(tmpline) - 7,
1111 '#', hdr_encode_map, txn->req.cap[hdr]);
1112 }
1113 *(h++) = '}';
1114 }
1115
1116 if (fe->to_log & LW_RSPHDR &&
1117 txn->rsp.cap &&
1118 (h < tmpline + sizeof(tmpline) - 7)) {
1119 *(h++) = ' ';
1120 *(h++) = '{';
1121 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1122 if (hdr)
1123 *(h++) = '|';
1124 if (txn->rsp.cap[hdr] != NULL)
1125 h = encode_string(h, tmpline + sizeof(tmpline) - 4,
1126 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1127 }
1128 *(h++) = '}';
1129 }
1130
1131 if (h < tmpline + sizeof(tmpline) - 4) {
1132 *(h++) = ' ';
1133 *(h++) = '"';
1134 uri = txn->uri ? txn->uri : "<BADREQ>";
1135 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
1136 '#', url_encode_map, uri);
1137 *(h++) = '"';
1138 }
1139 *h = '\0';
1140
1141 svid = (tolog & LW_SVID) ?
1142 (s->data_source != DATA_SRC_STATS) ?
1143 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
1144
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1145 t_request = -1;
1146 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
1147 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
1148
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1149 level = LOG_INFO;
1150 if (err && (fe->options2 & PR_O2_LOGERRORS))
1151 level = LOG_ERR;
1152
1153 send_log(prx_log, level,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1154 "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1155 " %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld"
1156 " %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]1157 pn,
1158 (s->cli_addr.ss_family == AF_INET) ?
1159 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
1160 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1161 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1162 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]1163 fe->id, be->id, svid,
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1164 t_request,
1165 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1166 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
1167 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
1168 (tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
1169 txn->status,
Willy Tarreau8b3977f2008-01-18 11:16:32 +0100[diff] [blame]1170 (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1171 txn->cli_cookie ? txn->cli_cookie : "-",
1172 txn->srv_cookie ? txn->srv_cookie : "-",
1173 sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
1174 sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
1175 (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
1176 (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-',
1177 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
Krzysztof Piotr Oledzki25b501a2008-01-06 16:36:16 +0100[diff] [blame]1178 (s->flags & SN_REDISP)?"+":"",
1179 (s->conn_retries>0)?(be->conn_retries - s->conn_retries):be->conn_retries,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1180 s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline);
1181
1182 s->logs.logwait = 0;
1183}
1184
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1185
1186/*
1187 * Capture headers from message starting at <som> according to header list
1188 * <cap_hdr>, and fill the <idx> structure appropriately.
1189 */
1190void capture_headers(char *som, struct hdr_idx *idx,
1191 char **cap, struct cap_hdr *cap_hdr)
1192{
1193 char *eol, *sol, *col, *sov;
1194 int cur_idx;
1195 struct cap_hdr *h;
1196 int len;
1197
1198 sol = som + hdr_idx_first_pos(idx);
1199 cur_idx = hdr_idx_first_idx(idx);
1200
1201 while (cur_idx) {
1202 eol = sol + idx->v[cur_idx].len;
1203
1204 col = sol;
1205 while (col < eol && *col != ':')
1206 col++;
1207
1208 sov = col + 1;
1209 while (sov < eol && http_is_lws[(unsigned char)*sov])
1210 sov++;
1211
1212 for (h = cap_hdr; h; h = h->next) {
1213 if ((h->namelen == col - sol) &&
1214 (strncasecmp(sol, h->name, h->namelen) == 0)) {
1215 if (cap[h->index] == NULL)
1216 cap[h->index] =
Willy Tarreaucf7f3202007-05-13 22:46:04 +0200[diff] [blame]1217 pool_alloc2(h->pool);
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1218
1219 if (cap[h->index] == NULL) {
1220 Alert("HTTP capture : out of memory.\n");
1221 continue;
1222 }
1223
1224 len = eol - sov;
1225 if (len > h->len)
1226 len = h->len;
1227
1228 memcpy(cap[h->index], sov, len);
1229 cap[h->index][len]=0;
1230 }
1231 }
1232 sol = eol + idx->v[cur_idx].cr + 1;
1233 cur_idx = idx->v[cur_idx].next;
1234 }
1235}
1236
1237
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1238/* either we find an LF at <ptr> or we jump to <bad>.
1239 */
1240#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
1241
1242/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
1243 * otherwise to <http_msg_ood> with <state> set to <st>.
1244 */
1245#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
1246 ptr++; \
1247 if (likely(ptr < end)) \
1248 goto good; \
1249 else { \
1250 state = (st); \
1251 goto http_msg_ood; \
1252 } \
1253 } while (0)
1254
1255
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1256/*
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1257 * This function parses a status line between <ptr> and <end>, starting with
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1258 * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
1259 * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
1260 * will give undefined results.
1261 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1262 * and that msg->sol points to the beginning of the response.
1263 * If a complete line is found (which implies that at least one CR or LF is
1264 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1265 * returned indicating an incomplete line (which does not mean that parts have
1266 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1267 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1268 * upon next call.
1269 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1270 * This function was intentionally designed to be called from
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1271 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1272 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1273 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1274 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1275const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
1276 unsigned int state, const char *ptr, const char *end,
1277 char **ret_ptr, unsigned int *ret_state)
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1278{
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1279 switch (state) {
1280 http_msg_rpver:
1281 case HTTP_MSG_RPVER:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1282 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1283 EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
1284
1285 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1286 msg->sl.st.v_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1287 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1288 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1289 state = HTTP_MSG_ERROR;
1290 break;
1291
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1292 http_msg_rpver_sp:
1293 case HTTP_MSG_RPVER_SP:
1294 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1295 msg->sl.st.c = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1296 goto http_msg_rpcode;
1297 }
1298 if (likely(HTTP_IS_SPHT(*ptr)))
1299 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1300 /* so it's a CR/LF, this is invalid */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1301 state = HTTP_MSG_ERROR;
1302 break;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1303
1304 http_msg_rpcode:
1305 case HTTP_MSG_RPCODE:
1306 if (likely(!HTTP_IS_LWS(*ptr)))
1307 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
1308
1309 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1310 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1311 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1312 }
1313
1314 /* so it's a CR/LF, so there is no reason phrase */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1315 msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1316 http_msg_rsp_reason:
1317 /* FIXME: should we support HTTP responses without any reason phrase ? */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1318 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1319 msg->sl.st.r_l = 0;
1320 goto http_msg_rpline_eol;
1321
1322 http_msg_rpcode_sp:
1323 case HTTP_MSG_RPCODE_SP:
1324 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1325 msg->sl.st.r = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1326 goto http_msg_rpreason;
1327 }
1328 if (likely(HTTP_IS_SPHT(*ptr)))
1329 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1330 /* so it's a CR/LF, so there is no reason phrase */
1331 goto http_msg_rsp_reason;
1332
1333 http_msg_rpreason:
1334 case HTTP_MSG_RPREASON:
1335 if (likely(!HTTP_IS_CRLF(*ptr)))
1336 EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1337 msg->sl.st.r_l = (ptr - msg_buf) - msg->som - msg->sl.st.r;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1338 http_msg_rpline_eol:
1339 /* We have seen the end of line. Note that we do not
1340 * necessarily have the \n yet, but at least we know that we
1341 * have EITHER \r OR \n, otherwise the response would not be
1342 * complete. We can then record the response length and return
1343 * to the caller which will be able to register it.
1344 */
1345 msg->sl.st.l = ptr - msg->sol;
1346 return ptr;
1347
1348#ifdef DEBUG_FULL
1349 default:
1350 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1351 exit(1);
1352#endif
1353 }
1354
1355 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1356 /* out of valid data */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1357 if (ret_state)
1358 *ret_state = state;
1359 if (ret_ptr)
1360 *ret_ptr = (char *)ptr;
1361 return NULL;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1362}
1363
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1364/*
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1365 * This function parses a request line between <ptr> and <end>, starting with
1366 * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
1367 * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
1368 * will give undefined results.
1369 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1370 * and that msg->sol points to the beginning of the request.
1371 * If a complete line is found (which implies that at least one CR or LF is
1372 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1373 * returned indicating an incomplete line (which does not mean that parts have
1374 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1375 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1376 * upon next call.
1377 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1378 * This function was intentionally designed to be called from
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1379 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1380 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1381 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1382 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1383const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
1384 unsigned int state, const char *ptr, const char *end,
1385 char **ret_ptr, unsigned int *ret_state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1386{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1387 switch (state) {
1388 http_msg_rqmeth:
1389 case HTTP_MSG_RQMETH:
1390 if (likely(HTTP_IS_TOKEN(*ptr)))
1391 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1392
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1393 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1394 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1395 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1396 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1397
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1398 if (likely(HTTP_IS_CRLF(*ptr))) {
1399 /* HTTP 0.9 request */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1400 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1401 http_msg_req09_uri:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1402 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1403 http_msg_req09_uri_e:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1404 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1405 http_msg_req09_ver:
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1406 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1407 msg->sl.rq.v_l = 0;
1408 goto http_msg_rqline_eol;
1409 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1410 state = HTTP_MSG_ERROR;
1411 break;
1412
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1413 http_msg_rqmeth_sp:
1414 case HTTP_MSG_RQMETH_SP:
1415 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1416 msg->sl.rq.u = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1417 goto http_msg_rquri;
1418 }
1419 if (likely(HTTP_IS_SPHT(*ptr)))
1420 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1421 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1422 goto http_msg_req09_uri;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1423
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1424 http_msg_rquri:
1425 case HTTP_MSG_RQURI:
1426 if (likely(!HTTP_IS_LWS(*ptr)))
1427 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1428
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1429 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1430 msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1431 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1432 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1433
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1434 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1435 goto http_msg_req09_uri_e;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1436
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1437 http_msg_rquri_sp:
1438 case HTTP_MSG_RQURI_SP:
1439 if (likely(!HTTP_IS_LWS(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1440 msg->sl.rq.v = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1441 goto http_msg_rqver;
1442 }
1443 if (likely(HTTP_IS_SPHT(*ptr)))
1444 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1445 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1446 goto http_msg_req09_ver;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1447
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1448 http_msg_rqver:
1449 case HTTP_MSG_RQVER:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1450 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1451 EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1452
1453 if (likely(HTTP_IS_CRLF(*ptr))) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1454 msg->sl.rq.v_l = (ptr - msg_buf) - msg->som - msg->sl.rq.v;
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1455 http_msg_rqline_eol:
1456 /* We have seen the end of line. Note that we do not
1457 * necessarily have the \n yet, but at least we know that we
1458 * have EITHER \r OR \n, otherwise the request would not be
1459 * complete. We can then record the request length and return
1460 * to the caller which will be able to register it.
1461 */
1462 msg->sl.rq.l = ptr - msg->sol;
1463 return ptr;
1464 }
1465
1466 /* neither an HTTP_VER token nor a CRLF */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1467 state = HTTP_MSG_ERROR;
1468 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1469
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1470#ifdef DEBUG_FULL
1471 default:
1472 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1473 exit(1);
1474#endif
1475 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1476
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1477 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1478 /* out of valid data */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1479 if (ret_state)
1480 *ret_state = state;
1481 if (ret_ptr)
1482 *ret_ptr = (char *)ptr;
1483 return NULL;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1484}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1485
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1486/*
1487 * Returns the data from Authorization header. Function may be called more
1488 * than once so data is stored in txn->auth_data. When no header is found
1489 * or auth method is unknown auth_method is set to HTTP_AUTH_WRONG to avoid
1490 * searching again for something we are unable to find anyway.
1491 */
1492
1493char get_http_auth_buff[BUFSIZE];
1494
1495int
1496get_http_auth(struct session *s)
1497{
1498
1499 struct http_txn *txn = &s->txn;
1500 struct chunk auth_method;
1501 struct hdr_ctx ctx;
1502 char *h, *p;
1503 int len;
1504
1505#ifdef DEBUG_AUTH
1506 printf("Auth for session %p: %d\n", s, txn->auth.method);
1507#endif
1508
1509 if (txn->auth.method == HTTP_AUTH_WRONG)
1510 return 0;
1511
1512 if (txn->auth.method)
1513 return 1;
1514
1515 txn->auth.method = HTTP_AUTH_WRONG;
1516
1517 ctx.idx = 0;
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]1518
1519 if (txn->flags & TX_USE_PX_CONN) {
1520 h = "Proxy-Authorization";
1521 len = strlen(h);
1522 } else {
1523 h = "Authorization";
1524 len = strlen(h);
1525 }
1526
1527 if (!http_find_header2(h, len, txn->req.sol, &txn->hdr_idx, &ctx))
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1528 return 0;
1529
1530 h = ctx.line + ctx.val;
1531
1532 p = memchr(h, ' ', ctx.vlen);
1533 if (!p || p == h)
1534 return 0;
1535
1536 chunk_initlen(&auth_method, h, 0, p-h);
1537 chunk_initlen(&txn->auth.method_data, p+1, 0, ctx.vlen-(p-h)-1);
1538
1539 if (!strncasecmp("Basic", auth_method.str, auth_method.len)) {
1540
1541 len = base64dec(txn->auth.method_data.str, txn->auth.method_data.len,
1542 get_http_auth_buff, BUFSIZE - 1);
1543
1544 if (len < 0)
1545 return 0;
1546
1547
1548 get_http_auth_buff[len] = '\0';
1549
1550 p = strchr(get_http_auth_buff, ':');
1551
1552 if (!p)
1553 return 0;
1554
1555 txn->auth.user = get_http_auth_buff;
1556 *p = '\0';
1557 txn->auth.pass = p+1;
1558
1559 txn->auth.method = HTTP_AUTH_BASIC;
1560 return 1;
1561 }
1562
1563 return 0;
1564}
1565
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1566
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1567/*
1568 * This function parses an HTTP message, either a request or a response,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1569 * depending on the initial msg->msg_state. It can be preempted everywhere
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1570 * when data are missing and recalled at the exact same location with no
1571 * information loss. The header index is re-initialized when switching from
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1572 * 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]1573 * fields. Note that msg->som and msg->sol will be initialized after completing
1574 * the first state, so that none of the msg pointers has to be initialized
1575 * prior to the first call.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1576 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1577void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx)
1578{
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1579 unsigned int state; /* updated only when leaving the FSM */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1580 register char *ptr, *end; /* request pointers, to avoid dereferences */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1581
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1582 state = msg->msg_state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1583 ptr = buf->lr;
1584 end = buf->r;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1585
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1586 if (unlikely(ptr >= end))
1587 goto http_msg_ood;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1588
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1589 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1590 /*
1591 * First, states that are specific to the response only.
1592 * We check them first so that request and headers are
1593 * closer to each other (accessed more often).
1594 */
1595 http_msg_rpbefore:
1596 case HTTP_MSG_RPBEFORE:
1597 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1598 /* we have a start of message, but we have to check
1599 * first if we need to remove some CRLF. We can only
1600 * do this when send_max=0.
1601 */
1602 char *beg = buf->w + buf->send_max;
1603 if (beg >= buf->data + buf->size)
1604 beg -= buf->size;
1605 if (unlikely(ptr != beg)) {
1606 if (buf->send_max)
1607 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1608 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1609 buffer_ignore(buf, ptr - beg);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1610 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1611 msg->som = ptr - buf->data;
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1612 msg->sol = ptr;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1613 hdr_idx_init(idx);
1614 state = HTTP_MSG_RPVER;
1615 goto http_msg_rpver;
1616 }
1617
1618 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1619 goto http_msg_invalid;
1620
1621 if (unlikely(*ptr == '\n'))
1622 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1623 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1624 /* stop here */
1625
1626 http_msg_rpbefore_cr:
1627 case HTTP_MSG_RPBEFORE_CR:
1628 EXPECT_LF_HERE(ptr, http_msg_invalid);
1629 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1630 /* stop here */
1631
1632 http_msg_rpver:
1633 case HTTP_MSG_RPVER:
1634 case HTTP_MSG_RPVER_SP:
1635 case HTTP_MSG_RPCODE:
1636 case HTTP_MSG_RPCODE_SP:
1637 case HTTP_MSG_RPREASON:
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1638 ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1639 &buf->lr, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1640 if (unlikely(!ptr))
1641 return;
1642
1643 /* we have a full response and we know that we have either a CR
1644 * or an LF at <ptr>.
1645 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1646 //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]1647 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1648
1649 msg->sol = ptr;
1650 if (likely(*ptr == '\r'))
1651 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1652 goto http_msg_rpline_end;
1653
1654 http_msg_rpline_end:
1655 case HTTP_MSG_RPLINE_END:
1656 /* msg->sol must point to the first of CR or LF. */
1657 EXPECT_LF_HERE(ptr, http_msg_invalid);
1658 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1659 /* stop here */
1660
1661 /*
1662 * Second, states that are specific to the request only
1663 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1664 http_msg_rqbefore:
1665 case HTTP_MSG_RQBEFORE:
1666 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1667 /* we have a start of message, but we have to check
1668 * first if we need to remove some CRLF. We can only
1669 * do this when send_max=0.
1670 */
1671 char *beg = buf->w + buf->send_max;
1672 if (beg >= buf->data + buf->size)
1673 beg -= buf->size;
1674 if (likely(ptr != beg)) {
1675 if (buf->send_max)
1676 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1677 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1678 buffer_ignore(buf, ptr - beg);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1679 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1680 msg->som = ptr - buf->data;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1681 msg->sol = ptr;
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1682 /* we will need this when keep-alive will be supported
1683 hdr_idx_init(idx);
1684 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1685 state = HTTP_MSG_RQMETH;
1686 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1687 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1688
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1689 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1690 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1691
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1692 if (unlikely(*ptr == '\n'))
1693 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1694 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1695 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1696
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1697 http_msg_rqbefore_cr:
1698 case HTTP_MSG_RQBEFORE_CR:
1699 EXPECT_LF_HERE(ptr, http_msg_invalid);
1700 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1701 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1702
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1703 http_msg_rqmeth:
1704 case HTTP_MSG_RQMETH:
1705 case HTTP_MSG_RQMETH_SP:
1706 case HTTP_MSG_RQURI:
1707 case HTTP_MSG_RQURI_SP:
1708 case HTTP_MSG_RQVER:
1709 ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1710 &buf->lr, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1711 if (unlikely(!ptr))
1712 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1713
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1714 /* we have a full request and we know that we have either a CR
1715 * or an LF at <ptr>.
1716 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1717 //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]1718 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1719
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1720 msg->sol = ptr;
1721 if (likely(*ptr == '\r'))
1722 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1723 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1724
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1725 http_msg_rqline_end:
1726 case HTTP_MSG_RQLINE_END:
1727 /* check for HTTP/0.9 request : no version information available.
1728 * msg->sol must point to the first of CR or LF.
1729 */
1730 if (unlikely(msg->sl.rq.v_l == 0))
1731 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1732
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1733 EXPECT_LF_HERE(ptr, http_msg_invalid);
1734 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1735 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1736
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1737 /*
1738 * Common states below
1739 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1740 http_msg_hdr_first:
1741 case HTTP_MSG_HDR_FIRST:
1742 msg->sol = ptr;
1743 if (likely(!HTTP_IS_CRLF(*ptr))) {
1744 goto http_msg_hdr_name;
1745 }
1746
1747 if (likely(*ptr == '\r'))
1748 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1749 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1750
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1751 http_msg_hdr_name:
1752 case HTTP_MSG_HDR_NAME:
1753 /* assumes msg->sol points to the first char */
1754 if (likely(HTTP_IS_TOKEN(*ptr)))
1755 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1756
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1757 if (likely(*ptr == ':')) {
1758 msg->col = ptr - buf->data;
1759 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
1760 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1761
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1762 if (likely(msg->err_pos < -1) || *ptr == '\n')
1763 goto http_msg_invalid;
1764
1765 if (msg->err_pos == -1) /* capture error pointer */
1766 msg->err_pos = ptr - buf->data; /* >= 0 now */
1767
1768 /* and we still accept this non-token character */
1769 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1770
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1771 http_msg_hdr_l1_sp:
1772 case HTTP_MSG_HDR_L1_SP:
1773 /* assumes msg->sol points to the first char and msg->col to the colon */
1774 if (likely(HTTP_IS_SPHT(*ptr)))
1775 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]1776
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1777 /* header value can be basically anything except CR/LF */
1778 msg->sov = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1779
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1780 if (likely(!HTTP_IS_CRLF(*ptr))) {
1781 goto http_msg_hdr_val;
1782 }
1783
1784 if (likely(*ptr == '\r'))
1785 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1786 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1787
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1788 http_msg_hdr_l1_lf:
1789 case HTTP_MSG_HDR_L1_LF:
1790 EXPECT_LF_HERE(ptr, http_msg_invalid);
1791 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]1792
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1793 http_msg_hdr_l1_lws:
1794 case HTTP_MSG_HDR_L1_LWS:
1795 if (likely(HTTP_IS_SPHT(*ptr))) {
1796 /* replace HT,CR,LF with spaces */
1797 for (; buf->data+msg->sov < ptr; msg->sov++)
1798 buf->data[msg->sov] = ' ';
1799 goto http_msg_hdr_l1_sp;
1800 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1801 /* we had a header consisting only in spaces ! */
1802 msg->eol = buf->data + msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1803 goto http_msg_complete_header;
1804
1805 http_msg_hdr_val:
1806 case HTTP_MSG_HDR_VAL:
1807 /* assumes msg->sol points to the first char, msg->col to the
1808 * colon, and msg->sov points to the first character of the
1809 * value.
1810 */
1811 if (likely(!HTTP_IS_CRLF(*ptr)))
1812 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1813
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1814 msg->eol = ptr;
1815 /* Note: we could also copy eol into ->eoh so that we have the
1816 * real header end in case it ends with lots of LWS, but is this
1817 * really needed ?
1818 */
1819 if (likely(*ptr == '\r'))
1820 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1821 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1822
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1823 http_msg_hdr_l2_lf:
1824 case HTTP_MSG_HDR_L2_LF:
1825 EXPECT_LF_HERE(ptr, http_msg_invalid);
1826 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]1827
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1828 http_msg_hdr_l2_lws:
1829 case HTTP_MSG_HDR_L2_LWS:
1830 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1831 /* LWS: replace HT,CR,LF with spaces */
1832 for (; msg->eol < ptr; msg->eol++)
1833 *msg->eol = ' ';
1834 goto http_msg_hdr_val;
1835 }
1836 http_msg_complete_header:
1837 /*
1838 * It was a new header, so the last one is finished.
1839 * Assumes msg->sol points to the first char, msg->col to the
1840 * colon, msg->sov points to the first character of the value
1841 * and msg->eol to the first CR or LF so we know how the line
1842 * ends. We insert last header into the index.
1843 */
1844 /*
1845 fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
1846 write(2, msg->sol, msg->eol-msg->sol);
1847 fprintf(stderr,"\n");
1848 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1849
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1850 if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
1851 idx, idx->tail) < 0))
1852 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1853
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1854 msg->sol = ptr;
1855 if (likely(!HTTP_IS_CRLF(*ptr))) {
1856 goto http_msg_hdr_name;
1857 }
1858
1859 if (likely(*ptr == '\r'))
1860 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1861 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1862
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1863 http_msg_last_lf:
1864 case HTTP_MSG_LAST_LF:
1865 /* Assumes msg->sol points to the first of either CR or LF */
1866 EXPECT_LF_HERE(ptr, http_msg_invalid);
1867 ptr++;
1868 buf->lr = ptr;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1869 msg->col = msg->sov = buf->lr - buf->data;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1870 msg->eoh = msg->sol - buf->data;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]1871 msg->sol = buf->data + msg->som;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1872 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1873 return;
1874#ifdef DEBUG_FULL
1875 default:
1876 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1877 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1878#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1879 }
1880 http_msg_ood:
1881 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1882 msg->msg_state = state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1883 buf->lr = ptr;
1884 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1885
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1886 http_msg_invalid:
1887 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1888 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1889 buf->lr = ptr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1890 return;
1891}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1892
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1893/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1894 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1895 * nothing is done and 1 is returned.
1896 */
1897static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
1898{
1899 int delta;
1900 char *cur_end;
1901
1902 if (msg->sl.rq.v_l != 0)
1903 return 1;
1904
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1905 cur_end = msg->sol + msg->sl.rq.l;
1906 delta = 0;
1907
1908 if (msg->sl.rq.u_l == 0) {
1909 /* if no URI was set, add "/" */
1910 delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
1911 cur_end += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1912 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1913 }
1914 /* add HTTP version */
1915 delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1916 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1917 cur_end += delta;
1918 cur_end = (char *)http_parse_reqline(msg, req->data,
1919 HTTP_MSG_RQMETH,
1920 msg->sol, cur_end + 1,
1921 NULL, NULL);
1922 if (unlikely(!cur_end))
1923 return 0;
1924
1925 /* we have a full HTTP/1.0 request now and we know that
1926 * we have either a CR or an LF at <ptr>.
1927 */
1928 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1929 return 1;
1930}
1931
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1932/* Parse the Connection: header of an HTTP request, looking for both "close"
1933 * and "keep-alive" values. If a buffer is provided and we already know that
1934 * some headers may safely be removed, we remove them now. The <to_del> flags
1935 * are used for that :
1936 * - bit 0 means remove "close" headers (in HTTP/1.0 requests/responses)
1937 * - bit 1 means remove "keep-alive" headers (in HTTP/1.1 reqs/resp to 1.1).
1938 * The TX_HDR_CONN_* flags are adjusted in txn->flags depending on what was
1939 * found, and TX_CON_*_SET is adjusted depending on what is left so only
1940 * harmless combinations may be removed. Do not call that after changes have
1941 * been processed. If unused, the buffer can be NULL, and no data will be
1942 * changed.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1943 */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1944void 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]1945{
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1946 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1947 const char *hdr_val = "Connection";
1948 int hdr_len = 10;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1949
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1950 if (txn->flags & TX_HDR_CONN_PRS)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1951 return;
1952
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1953 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1954 hdr_val = "Proxy-Connection";
1955 hdr_len = 16;
1956 }
1957
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1958 ctx.idx = 0;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1959 txn->flags &= ~(TX_CON_KAL_SET|TX_CON_CLO_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1960 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1961 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
1962 txn->flags |= TX_HDR_CONN_KAL;
1963 if ((to_del & 2) && buf)
1964 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
1965 else
1966 txn->flags |= TX_CON_KAL_SET;
1967 }
1968 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
1969 txn->flags |= TX_HDR_CONN_CLO;
1970 if ((to_del & 1) && buf)
1971 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
1972 else
1973 txn->flags |= TX_CON_CLO_SET;
1974 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1975 }
1976
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1977 txn->flags |= TX_HDR_CONN_PRS;
1978 return;
1979}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1980
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1981/* Apply desired changes on the Connection: header. Values may be removed and/or
1982 * added depending on the <wanted> flags, which are exclusively composed of
1983 * TX_CON_CLO_SET and TX_CON_KAL_SET, depending on what flags are desired. The
1984 * TX_CON_*_SET flags are adjusted in txn->flags depending on what is left.
1985 */
1986void http_change_connection_header(struct http_txn *txn, struct http_msg *msg, struct buffer *buf, int wanted)
1987{
1988 struct hdr_ctx ctx;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1989 const char *hdr_val = "Connection";
1990 int hdr_len = 10;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]1991
1992 ctx.idx = 0;
1993
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]1994
1995 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
1996 hdr_val = "Proxy-Connection";
1997 hdr_len = 16;
1998 }
1999
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2000 txn->flags &= ~(TX_CON_CLO_SET | TX_CON_KAL_SET);
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2001 while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2002 if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
2003 if (wanted & TX_CON_KAL_SET)
2004 txn->flags |= TX_CON_KAL_SET;
2005 else
2006 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2007 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2008 else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
2009 if (wanted & TX_CON_CLO_SET)
2010 txn->flags |= TX_CON_CLO_SET;
2011 else
2012 http_remove_header2(msg, buf, &txn->hdr_idx, &ctx);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2013 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2014 }
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2015
2016 if (wanted == (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
2017 return;
2018
2019 if ((wanted & TX_CON_CLO_SET) && !(txn->flags & TX_CON_CLO_SET)) {
2020 txn->flags |= TX_CON_CLO_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2021 hdr_val = "Connection: close";
2022 hdr_len = 17;
2023 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2024 hdr_val = "Proxy-Connection: close";
2025 hdr_len = 23;
2026 }
2027 http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2028 }
2029
2030 if ((wanted & TX_CON_KAL_SET) && !(txn->flags & TX_CON_KAL_SET)) {
2031 txn->flags |= TX_CON_KAL_SET;
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2032 hdr_val = "Connection: keep-alive";
2033 hdr_len = 22;
2034 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
2035 hdr_val = "Proxy-Connection: keep-alive";
2036 hdr_len = 28;
2037 }
2038 http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len);
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2039 }
2040 return;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2041}
2042
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2043/* Parse the chunk size at buf->lr. Once done, it adjusts ->lr to point to the
2044 * first byte of body, and increments msg->sov by the number of bytes parsed,
2045 * so that we know we can forward between ->som and ->sov. Note that due to
2046 * possible wrapping at the end of the buffer, it is possible that msg->sov is
2047 * lower than msg->som.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2048 * Return >0 on success, 0 when some data is missing, <0 on error.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2049 * 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]2050 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2051int http_parse_chunk_size(struct buffer *buf, struct http_msg *msg)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2052{
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2053 char *ptr = buf->lr;
2054 char *end = buf->data + buf->size;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2055 unsigned int chunk = 0;
2056
2057 /* The chunk size is in the following form, though we are only
2058 * interested in the size and CRLF :
2059 * 1*HEXDIGIT *WSP *[ ';' extensions ] CRLF
2060 */
2061 while (1) {
2062 int c;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2063 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2064 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2065 c = hex2i(*ptr);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2066 if (c < 0) /* not a hex digit anymore */
2067 break;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2068 if (++ptr >= end)
2069 ptr = buf->data;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2070 if (chunk & 0xF000000) /* overflow will occur */
2071 return -1;
2072 chunk = (chunk << 4) + c;
2073 }
2074
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2075 /* empty size not allowed */
2076 if (ptr == buf->lr)
2077 return -1;
2078
2079 while (http_is_spht[(unsigned char)*ptr]) {
2080 if (++ptr >= end)
2081 ptr = buf->data;
2082 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2083 return 0;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2084 }
2085
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2086 /* Up to there, we know that at least one byte is present at *ptr. Check
2087 * for the end of chunk size.
2088 */
2089 while (1) {
2090 if (likely(HTTP_IS_CRLF(*ptr))) {
2091 /* we now have a CR or an LF at ptr */
2092 if (likely(*ptr == '\r')) {
2093 if (++ptr >= end)
2094 ptr = buf->data;
2095 if (ptr == buf->r)
2096 return 0;
2097 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2098
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2099 if (*ptr != '\n')
2100 return -1;
2101 if (++ptr >= end)
2102 ptr = buf->data;
2103 /* done */
2104 break;
2105 }
2106 else if (*ptr == ';') {
2107 /* chunk extension, ends at next CRLF */
2108 if (++ptr >= end)
2109 ptr = buf->data;
2110 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2111 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2112
2113 while (!HTTP_IS_CRLF(*ptr)) {
2114 if (++ptr >= end)
2115 ptr = buf->data;
2116 if (ptr == buf->r)
2117 return 0;
2118 }
2119 /* we have a CRLF now, loop above */
2120 continue;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2121 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2122 else
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2123 return -1;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2124 }
2125
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2126 /* OK we found our CRLF and now <ptr> points to the next byte,
2127 * which may or may not be present. We save that into ->lr and
2128 * ->sov.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2129 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2130 msg->sov += ptr - buf->lr;
2131 buf->lr = ptr;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2132 msg->hdr_content_len = chunk;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2133 msg->msg_state = chunk ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]2134 return 1;
2135}
2136
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2137/* This function skips trailers in the buffer <buf> associated with HTTP
2138 * message <msg>. The first visited position is buf->lr. If the end of
2139 * the trailers is found, it is automatically scheduled to be forwarded,
2140 * msg->msg_state switches to HTTP_MSG_DONE, and the function returns >0.
2141 * If not enough data are available, the function does not change anything
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2142 * except maybe buf->lr and msg->sov if it could parse some lines, and returns
2143 * zero. If a parse error is encountered, the function returns < 0 and does not
2144 * change anything except maybe buf->lr and msg->sov. Note that the message
2145 * must already be in HTTP_MSG_TRAILERS state before calling this function,
2146 * which implies that all non-trailers data have already been scheduled for
2147 * forwarding, and that the difference between msg->som and msg->sov exactly
2148 * matches the length of trailers already parsed and not forwarded. It is also
2149 * important to note that this function is designed to be able to parse wrapped
2150 * headers at end of buffer.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2151 */
2152int http_forward_trailers(struct buffer *buf, struct http_msg *msg)
2153{
2154 /* we have buf->lr which points to next line. Look for CRLF. */
2155 while (1) {
2156 char *p1 = NULL, *p2 = NULL;
2157 char *ptr = buf->lr;
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2158 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2159
2160 /* scan current line and stop at LF or CRLF */
2161 while (1) {
2162 if (ptr == buf->r)
2163 return 0;
2164
2165 if (*ptr == '\n') {
2166 if (!p1)
2167 p1 = ptr;
2168 p2 = ptr;
2169 break;
2170 }
2171
2172 if (*ptr == '\r') {
2173 if (p1)
2174 return -1;
2175 p1 = ptr;
2176 }
2177
2178 ptr++;
2179 if (ptr >= buf->data + buf->size)
2180 ptr = buf->data;
2181 }
2182
2183 /* after LF; point to beginning of next line */
2184 p2++;
2185 if (p2 >= buf->data + buf->size)
2186 p2 = buf->data;
2187
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2188 bytes = p2 - buf->lr;
2189 if (bytes < 0)
2190 bytes += buf->size;
2191
2192 /* schedule this line for forwarding */
2193 msg->sov += bytes;
2194 if (msg->sov >= buf->size)
2195 msg->sov -= buf->size;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2196
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2197 if (p1 == buf->lr) {
2198 /* LF/CRLF at beginning of line => end of trailers at p2.
2199 * Everything was scheduled for forwarding, there's nothing
2200 * left from this message.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]2201 */
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]2202 buf->lr = p2;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2203 msg->msg_state = HTTP_MSG_DONE;
2204 return 1;
2205 }
2206 /* OK, next line then */
2207 buf->lr = p2;
2208 }
2209}
2210
2211/* This function may be called only in HTTP_MSG_DATA_CRLF. It reads the CRLF or
2212 * a possible LF alone at the end of a chunk. It automatically adjusts msg->sov,
2213 * ->som, buf->lr in order to include this part into the next forwarding phase.
2214 * It also sets msg_state to HTTP_MSG_CHUNK_SIZE and returns >0 on success. If
2215 * not enough data are available, the function does not change anything and
2216 * returns zero. If a parse error is encountered, the function returns < 0 and
2217 * does not change anything. Note: this function is designed to parse wrapped
2218 * CRLF at the end of the buffer.
2219 */
2220int http_skip_chunk_crlf(struct buffer *buf, struct http_msg *msg)
2221{
2222 char *ptr;
2223 int bytes;
2224
2225 /* NB: we'll check data availabilty at the end. It's not a
2226 * problem because whatever we match first will be checked
2227 * against the correct length.
2228 */
2229 bytes = 1;
2230 ptr = buf->lr;
2231 if (*ptr == '\r') {
2232 bytes++;
2233 ptr++;
2234 if (ptr >= buf->data + buf->size)
2235 ptr = buf->data;
2236 }
2237
2238 if (buf->l < bytes)
2239 return 0;
2240
2241 if (*ptr != '\n')
2242 return -1;
2243
2244 ptr++;
2245 if (ptr >= buf->data + buf->size)
2246 ptr = buf->data;
2247 buf->lr = ptr;
2248 /* prepare the CRLF to be forwarded. msg->som may be before data but we don't care */
2249 msg->sov = ptr - buf->data;
2250 msg->som = msg->sov - bytes;
2251 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
2252 return 1;
2253}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2254
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2255void http_buffer_heavy_realign(struct buffer *buf, struct http_msg *msg)
2256{
2257 char *end = buf->data + buf->size;
2258 int off = buf->data + buf->size - buf->w;
2259
2260 /* two possible cases :
2261 * - the buffer is in one contiguous block, we move it in-place
2262 * - the buffer is in two blocks, we move it via the trash
2263 */
2264 if (buf->l) {
Willy Tarreaub97f1992010-02-25 23:54:31 +0100[diff] [blame]2265 if (buf->r <= buf->w)
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2266 /* non-contiguous block */
Willy Tarreaub97f1992010-02-25 23:54:31 +0100[diff] [blame]2267 buffer_bounce_realign(buf);
2268 else
2269 memmove(buf->data, buf->w, buf->l);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2270 }
2271
2272 /* adjust all known pointers */
2273 buf->w = buf->data;
2274 buf->lr += off; if (buf->lr >= end) buf->lr -= buf->size;
2275 buf->r += off; if (buf->r >= end) buf->r -= buf->size;
2276 msg->sol += off; if (msg->sol >= end) msg->sol -= buf->size;
2277 msg->eol += off; if (msg->eol >= end) msg->eol -= buf->size;
2278
2279 /* adjust relative pointers */
2280 msg->som = 0;
2281 msg->eoh += off; if (msg->eoh >= buf->size) msg->eoh -= buf->size;
2282 msg->col += off; if (msg->col >= buf->size) msg->col -= buf->size;
2283 msg->sov += off; if (msg->sov >= buf->size) msg->sov -= buf->size;
2284
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2285 if (msg->err_pos >= 0) {
2286 msg->err_pos += off;
2287 if (msg->err_pos >= buf->size)
2288 msg->err_pos -= buf->size;
2289 }
2290
2291 buf->flags &= ~BF_FULL;
2292 if (buf->l >= buffer_max_len(buf))
2293 buf->flags |= BF_FULL;
2294}
2295
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2296/* This stream analyser waits for a complete HTTP request. It returns 1 if the
2297 * processing can continue on next analysers, or zero if it either needs more
2298 * data or wants to immediately abort the request (eg: timeout, error, ...). It
2299 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
2300 * when it has nothing left to do, and may remove any analyser when it wants to
2301 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2302 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2303int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2304{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2305 /*
2306 * We will parse the partial (or complete) lines.
2307 * We will check the request syntax, and also join multi-line
2308 * headers. An index of all the lines will be elaborated while
2309 * parsing.
2310 *
2311 * For the parsing, we use a 28 states FSM.
2312 *
2313 * Here is the information we currently have :
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2314 * req->data + msg->som = beginning of request
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2315 * req->data + msg->eoh = end of processed headers / start of current one
2316 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2317 * req->lr = first non-visited byte
2318 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2319 *
2320 * At end of parsing, we may perform a capture of the error (if any), and
2321 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
2322 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
2323 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2324 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2325
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2326 int cur_idx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2327 int use_close_only;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2328 struct http_txn *txn = &s->txn;
2329 struct http_msg *msg = &txn->req;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2330 struct hdr_ctx ctx;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2331
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]2332 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2333 now_ms, __FUNCTION__,
2334 s,
2335 req,
2336 req->rex, req->wex,
2337 req->flags,
2338 req->l,
2339 req->analysers);
2340
Willy Tarreau52a0c602009-08-16 22:45:38 +0200[diff] [blame]2341 /* we're speaking HTTP here, so let's speak HTTP to the client */
2342 s->srv_error = http_return_srv_error;
2343
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2344 /* There's a protected area at the end of the buffer for rewriting
2345 * purposes. We don't want to start to parse the request if the
2346 * protected area is affected, because we may have to move processed
2347 * data later, which is much more complicated.
2348 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2349 if (req->l && msg->msg_state < HTTP_MSG_ERROR) {
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2350 if ((txn->flags & TX_NOT_FIRST) &&
2351 unlikely((req->flags & BF_FULL) ||
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2352 req->r < req->lr ||
2353 req->r > req->data + req->size - global.tune.maxrewrite)) {
2354 if (req->send_max) {
2355 /* some data has still not left the buffer, wake us once that's done */
2356 buffer_dont_connect(req);
2357 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
2358 return 0;
2359 }
2360 if (req->l <= req->size - global.tune.maxrewrite)
2361 http_buffer_heavy_realign(req, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2362 }
2363
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2364 /* Note that we have the same problem with the response ; we
2365 * may want to send a redirect, error or anything which requires
2366 * some spare space. So we'll ensure that we have at least
2367 * maxrewrite bytes available in the response buffer before
2368 * processing that one. This will only affect pipelined
2369 * keep-alive requests.
2370 */
2371 if ((txn->flags & TX_NOT_FIRST) &&
2372 unlikely((s->rep->flags & BF_FULL) ||
2373 s->rep->r < s->rep->lr ||
2374 s->rep->r > s->rep->data + s->rep->size - global.tune.maxrewrite)) {
2375 if (s->rep->send_max) {
2376 /* don't let a connection request be initiated */
2377 buffer_dont_connect(req);
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2378 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]2379 return 0;
2380 }
2381 }
2382
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2383 if (likely(req->lr < req->r))
2384 http_msg_analyzer(req, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2385 }
2386
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2387 /* 1: we might have to print this header in debug mode */
2388 if (unlikely((global.mode & MODE_DEBUG) &&
2389 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2390 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2391 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2392
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2393 sol = msg->sol;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2394 eol = sol + msg->sl.rq.l;
2395 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2396
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2397 sol += hdr_idx_first_pos(&txn->hdr_idx);
2398 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2399
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2400 while (cur_idx) {
2401 eol = sol + txn->hdr_idx.v[cur_idx].len;
2402 debug_hdr("clihdr", s, sol, eol);
2403 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2404 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2405 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2406 }
2407
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2408
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2409 /*
2410 * Now we quickly check if we have found a full valid request.
2411 * If not so, we check the FD and buffer states before leaving.
2412 * A full request is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2413 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2414 * requests are checked first. When waiting for a second request
2415 * on a keep-alive session, if we encounter and error, close, t/o,
2416 * we note the error in the session flags but don't set any state.
2417 * Since the error will be noted there, it will not be counted by
2418 * process_session() as a frontend error.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2419 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2420
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2421 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2422 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2423 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2424 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2425 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
2426 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2427
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2428 /* 1: Since we are in header mode, if there's no space
2429 * left for headers, we won't be able to free more
2430 * later, so the session will never terminate. We
2431 * must terminate it now.
2432 */
2433 if (unlikely(req->flags & BF_FULL)) {
2434 /* FIXME: check if URI is set and return Status
2435 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2436 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2437 goto return_bad_req;
2438 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2439
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2440 /* 2: have we encountered a read error ? */
2441 else if (req->flags & BF_READ_ERROR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2442 if (!(s->flags & SN_ERR_MASK))
2443 s->flags |= SN_ERR_CLICL;
2444
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2445 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2446 goto failed_keep_alive;
2447
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2448 /* we cannot return any message on error */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2449 if (msg->err_pos >= 0)
2450 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2451 msg->msg_state = HTTP_MSG_ERROR;
2452 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2453
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2454 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2455 if (s->listener->counters)
2456 s->listener->counters->failed_req++;
2457
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2458 if (!(s->flags & SN_FINST_MASK))
2459 s->flags |= SN_FINST_R;
2460 return 0;
2461 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2462
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2463 /* 3: has the read timeout expired ? */
2464 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]2465 if (!(s->flags & SN_ERR_MASK))
2466 s->flags |= SN_ERR_CLITO;
2467
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2468 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2469 goto failed_keep_alive;
2470
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2471 /* read timeout : give up with an error message. */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2472 if (msg->err_pos >= 0)
2473 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2474 txn->status = 408;
2475 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
2476 msg->msg_state = HTTP_MSG_ERROR;
2477 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2478
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2479 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2480 if (s->listener->counters)
2481 s->listener->counters->failed_req++;
2482
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2483 if (!(s->flags & SN_FINST_MASK))
2484 s->flags |= SN_FINST_R;
2485 return 0;
2486 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2487
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2488 /* 4: have we encountered a close ? */
2489 else if (req->flags & BF_SHUTR) {
Willy Tarreaud3c343f2010-01-16 10:26:19 +0100[diff] [blame]2490 if (!(s->flags & SN_ERR_MASK))
2491 s->flags |= SN_ERR_CLICL;
2492
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2493 if (txn->flags & TX_WAIT_NEXT_RQ)
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2494 goto failed_keep_alive;
2495
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2496 if (msg->err_pos >= 0)
2497 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2498 txn->status = 400;
2499 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2500 msg->msg_state = HTTP_MSG_ERROR;
2501 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2502
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2503 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2504 if (s->listener->counters)
2505 s->listener->counters->failed_req++;
2506
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2507 if (!(s->flags & SN_FINST_MASK))
2508 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2509 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2510 }
2511
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2512 buffer_dont_connect(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2513 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2514 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2515
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2516 if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) {
2517 /* If the client starts to talk, let's fall back to
2518 * request timeout processing.
2519 */
2520 txn->flags &= ~TX_WAIT_NEXT_RQ;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2521 req->analyse_exp = TICK_ETERNITY;
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]2522 }
2523
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2524 /* just set the request timeout once at the beginning of the request */
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2525 if (!tick_isset(req->analyse_exp)) {
2526 if ((msg->msg_state == HTTP_MSG_RQBEFORE) &&
2527 (txn->flags & TX_WAIT_NEXT_RQ) &&
2528 tick_isset(s->be->timeout.httpka))
2529 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
2530 else
2531 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
2532 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2533
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2534 /* we're not ready yet */
2535 return 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2536
2537 failed_keep_alive:
2538 /* Here we process low-level errors for keep-alive requests. In
2539 * short, if the request is not the first one and it experiences
2540 * a timeout, read error or shutdown, we just silently close so
2541 * that the client can try again.
2542 */
2543 txn->status = 0;
2544 msg->msg_state = HTTP_MSG_RQBEFORE;
2545 req->analysers = 0;
2546 s->logs.logwait = 0;
Willy Tarreauff7b5882010-01-22 14:41:29 +0100[diff] [blame]2547 s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]2548 stream_int_retnclose(req->prod, NULL);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2549 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2550 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2551
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2552 /* OK now we have a complete HTTP request with indexed headers. Let's
2553 * complete the request parsing by setting a few fields we will need
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]2554 * later. At this point, we have the last CRLF at req->data + msg->eoh.
2555 * If the request is in HTTP/0.9 form, the rule is still true, and eoh
2556 * points to the CRLF of the request line. req->lr points to the first
2557 * byte after the last LF. msg->col and msg->sov point to the first
2558 * byte of data. msg->eol cannot be trusted because it may have been
2559 * left uninitialized (for instance in the absence of headers).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2560 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]2561
Willy Tarreaud9b587f2010-02-26 10:05:55 +0100[diff] [blame^]2562 proxy_inc_fe_req_ctr(s->fe); /* one more valid request for this FE */
2563
Willy Tarreaub16a5742010-01-10 14:46:16 +0100[diff] [blame]2564 if (txn->flags & TX_WAIT_NEXT_RQ) {
2565 /* kill the pending keep-alive timeout */
2566 txn->flags &= ~TX_WAIT_NEXT_RQ;
2567 req->analyse_exp = TICK_ETERNITY;
2568 }
2569
2570
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2571 /* Maybe we found in invalid header name while we were configured not
2572 * to block on that, so we have to capture it now.
2573 */
2574 if (unlikely(msg->err_pos >= 0))
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2575 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2576
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2577 /*
2578 * 1: identify the method
2579 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2580 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2581
2582 /* we can make use of server redirect on GET and HEAD */
2583 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
2584 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2585
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2586 /*
2587 * 2: check if the URI matches the monitor_uri.
2588 * We have to do this for every request which gets in, because
2589 * the monitor-uri is defined by the frontend.
2590 */
2591 if (unlikely((s->fe->monitor_uri_len != 0) &&
2592 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2593 !memcmp(msg->sol + msg->sl.rq.u,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2594 s->fe->monitor_uri,
2595 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2596 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2597 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2598 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2599 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2600
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2601 s->flags |= SN_MONITOR;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2602
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2603 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2604 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
2605 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2606
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2607 ret = acl_pass(ret);
2608 if (cond->pol == ACL_COND_UNLESS)
2609 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2610
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2611 if (ret) {
2612 /* we fail this request, let's return 503 service unavail */
2613 txn->status = 503;
2614 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
2615 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2616 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2617 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]2618
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2619 /* nothing to fail, let's reply normaly */
2620 txn->status = 200;
2621 stream_int_retnclose(req->prod, &http_200_chunk);
2622 goto return_prx_cond;
2623 }
2624
2625 /*
2626 * 3: Maybe we have to copy the original REQURI for the logs ?
2627 * Note: we cannot log anymore if the request has been
2628 * classified as invalid.
2629 */
2630 if (unlikely(s->logs.logwait & LW_REQ)) {
2631 /* we have a complete HTTP request that we must log */
2632 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
2633 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2634
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2635 if (urilen >= REQURI_LEN)
2636 urilen = REQURI_LEN - 1;
2637 memcpy(txn->uri, &req->data[msg->som], urilen);
2638 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2639
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2640 if (!(s->logs.logwait &= ~LW_REQ))
2641 s->do_log(s);
2642 } else {
2643 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2644 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2645 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2646
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2647 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]2648 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
2649 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2650
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2651 /* ... and check if the request is HTTP/1.1 or above */
2652 if ((msg->sl.rq.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2653 ((msg->sol[msg->sl.rq.v + 5] > '1') ||
2654 ((msg->sol[msg->sl.rq.v + 5] == '1') &&
2655 (msg->sol[msg->sl.rq.v + 7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2656 txn->flags |= TX_REQ_VER_11;
2657
2658 /* "connection" has not been parsed yet */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2659 txn->flags &= ~(TX_HDR_CONN_PRS | TX_HDR_CONN_CLO | TX_HDR_CONN_KAL);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2660
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]2661 /* if the frontend has "option http-use-proxy-header", we'll check if
2662 * we have what looks like a proxied connection instead of a connection,
2663 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
2664 * Note that this is *not* RFC-compliant, however browsers and proxies
2665 * happen to do that despite being non-standard :-(
2666 * We consider that a request not beginning with either '/' or '*' is
2667 * a proxied connection, which covers both "scheme://location" and
2668 * CONNECT ip:port.
2669 */
2670 if ((s->fe->options2 & PR_O2_USE_PXHDR) &&
2671 msg->sol[msg->sl.rq.u] != '/' && msg->sol[msg->sl.rq.u] != '*')
2672 txn->flags |= TX_USE_PX_CONN;
2673
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2674 /* transfer length unknown*/
2675 txn->flags &= ~TX_REQ_XFER_LEN;
2676
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2677 /* 5: we may need to capture headers */
2678 if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]2679 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2680 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2681
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2682 /* 6: determine the transfer-length.
2683 * According to RFC2616 #4.4, amended by the HTTPbis working group,
2684 * the presence of a message-body in a REQUEST and its transfer length
2685 * must be determined that way (in order of precedence) :
2686 * 1. The presence of a message-body in a request is signaled by the
2687 * inclusion of a Content-Length or Transfer-Encoding header field
2688 * in the request's header fields. When a request message contains
2689 * both a message-body of non-zero length and a method that does
2690 * not define any semantics for that request message-body, then an
2691 * origin server SHOULD either ignore the message-body or respond
2692 * with an appropriate error message (e.g., 413). A proxy or
2693 * gateway, when presented the same request, SHOULD either forward
2694 * the request inbound with the message- body or ignore the
2695 * message-body when determining a response.
2696 *
2697 * 2. If a Transfer-Encoding header field (Section 9.7) is present
2698 * and the "chunked" transfer-coding (Section 6.2) is used, the
2699 * transfer-length is defined by the use of this transfer-coding.
2700 * If a Transfer-Encoding header field is present and the "chunked"
2701 * transfer-coding is not present, the transfer-length is defined
2702 * by the sender closing the connection.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2703 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2704 * 3. If a Content-Length header field is present, its decimal value in
2705 * OCTETs represents both the entity-length and the transfer-length.
2706 * If a message is received with both a Transfer-Encoding header
2707 * field and a Content-Length header field, the latter MUST be ignored.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2708 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2709 * 4. By the server closing the connection. (Closing the connection
2710 * cannot be used to indicate the end of a request body, since that
2711 * would leave no possibility for the server to send back a response.)
2712 *
2713 * Whenever a transfer-coding is applied to a message-body, the set of
2714 * transfer-codings MUST include "chunked", unless the message indicates
2715 * it is terminated by closing the connection. When the "chunked"
2716 * transfer-coding is used, it MUST be the last transfer-coding applied
2717 * to the message-body.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2718 */
2719
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2720 use_close_only = 0;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2721 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2722 /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]2723 while ((txn->flags & TX_REQ_VER_11) &&
2724 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2725 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
2726 txn->flags |= (TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2727 else if (txn->flags & TX_REQ_TE_CHNK) {
2728 /* bad transfer-encoding (chunked followed by something else) */
2729 use_close_only = 1;
2730 txn->flags &= ~(TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2731 break;
2732 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2733 }
2734
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2735 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2736 while (!(txn->flags & TX_REQ_TE_CHNK) && !use_close_only &&
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2737 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
2738 signed long long cl;
2739
2740 if (!ctx.vlen)
2741 goto return_bad_req;
2742
2743 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
2744 goto return_bad_req; /* parse failure */
2745
2746 if (cl < 0)
2747 goto return_bad_req;
2748
2749 if ((txn->flags & TX_REQ_CNT_LEN) && (msg->hdr_content_len != cl))
2750 goto return_bad_req; /* already specified, was different */
2751
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2752 txn->flags |= TX_REQ_CNT_LEN | TX_REQ_XFER_LEN;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2753 msg->hdr_content_len = cl;
2754 }
2755
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2756 /* bodyless requests have a known length */
2757 if (!use_close_only)
2758 txn->flags |= TX_REQ_XFER_LEN;
2759
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2760 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2761 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2762 req->analyse_exp = TICK_ETERNITY;
2763 return 1;
2764
2765 return_bad_req:
2766 /* We centralize bad requests processing here */
2767 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2768 /* we detected a parsing error. We want to archive this request
2769 * in the dedicated proxy area for later troubleshooting.
2770 */
2771 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2772 }
2773
2774 txn->req.msg_state = HTTP_MSG_ERROR;
2775 txn->status = 400;
2776 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2777
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2778 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2779 if (s->listener->counters)
2780 s->listener->counters->failed_req++;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2781
2782 return_prx_cond:
2783 if (!(s->flags & SN_ERR_MASK))
2784 s->flags |= SN_ERR_PRXCOND;
2785 if (!(s->flags & SN_FINST_MASK))
2786 s->flags |= SN_FINST_R;
2787
2788 req->analysers = 0;
2789 req->analyse_exp = TICK_ETERNITY;
2790 return 0;
2791}
2792
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2793/* This stream analyser runs all HTTP request processing which is common to
2794 * frontends and backends, which means blocking ACLs, filters, connection-close,
2795 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2796 * 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]2797 * either needs more data or wants to immediately abort the request (eg: deny,
2798 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2799 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2800int 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]2801{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2802 struct http_txn *txn = &s->txn;
2803 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2804 struct acl_cond *cond;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2805 struct req_acl_rule *req_acl, *req_acl_final = NULL;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2806 struct redirect_rule *rule;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]2807 struct cond_wordlist *wl;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2808 int del_ka, del_cl, do_stats;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2809
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2810 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2811 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2812 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2813 return 0;
2814 }
2815
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2816 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2817 req->analyse_exp = TICK_ETERNITY;
2818
2819 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2820 now_ms, __FUNCTION__,
2821 s,
2822 req,
2823 req->rex, req->wex,
2824 req->flags,
2825 req->l,
2826 req->analysers);
2827
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2828 /* first check whether we have some ACLs set to block this request */
2829 list_for_each_entry(cond, &px->block_cond, list) {
2830 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]2831
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2832 ret = acl_pass(ret);
2833 if (cond->pol == ACL_COND_UNLESS)
2834 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]2835
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2836 if (ret) {
2837 txn->status = 403;
2838 /* let's log the request time */
2839 s->logs.tv_request = now;
2840 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2841 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2842 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2843 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2844
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2845 do_stats = stats_check_uri(s, px);
2846
2847 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]2848 int ret = 1;
2849
2850 if (req_acl->action >= PR_REQ_ACL_ACT_MAX)
2851 continue;
2852
2853 /* check condition, but only if attached */
Krzysztof Olędzki711ad9e2010-02-01 12:36:53 +0100[diff] [blame]2854 if (req_acl->cond) {
2855 ret = acl_exec_cond(req_acl->cond, px, s, txn, ACL_DIR_REQ);
2856 ret = acl_pass(ret);
Willy Tarreau51425942010-02-01 10:40:19 +0100[diff] [blame]2857
Krzysztof Olędzki711ad9e2010-02-01 12:36:53 +0100[diff] [blame]2858 if (req_acl->cond->pol == ACL_COND_UNLESS)
2859 ret = !ret;
2860 }
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2861
2862 if (ret) {
2863 req_acl_final = req_acl;
2864 break;
2865 }
2866 }
2867
2868 if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_DENY) {
2869 txn->status = 403;
2870 s->logs.tv_request = now;
2871 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2872 goto return_prx_cond;
2873 }
2874
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2875 /* try headers filters */
2876 if (px->req_exp != NULL) {
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]2877 if (apply_filters_to_request(s, req, px) < 0)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2878 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2879
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2880 /* has the request been denied ? */
2881 if (txn->flags & TX_CLDENY) {
2882 /* no need to go further */
2883 txn->status = 403;
2884 /* let's log the request time */
2885 s->logs.tv_request = now;
2886 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2887 goto return_prx_cond;
2888 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2889
2890 /* When a connection is tarpitted, we use the tarpit timeout,
2891 * which may be the same as the connect timeout if unspecified.
2892 * If unset, then set it to zero because we really want it to
2893 * eventually expire. We build the tarpit as an analyser.
2894 */
2895 if (txn->flags & TX_CLTARPIT) {
2896 buffer_erase(s->req);
2897 /* wipe the request out so that we can drop the connection early
2898 * if the client closes first.
2899 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2900 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2901 req->analysers = 0; /* remove switching rules etc... */
2902 req->analysers |= AN_REQ_HTTP_TARPIT;
2903 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
2904 if (!req->analyse_exp)
2905 req->analyse_exp = tick_add(now_ms, 0);
2906 return 1;
2907 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2908 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2909
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2910 /* Until set to anything else, the connection mode is set as TUNNEL. It will
2911 * only change if both the request and the config reference something else.
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2912 * Option httpclose by itself does not set a mode, it remains a tunnel mode
2913 * in which headers are mangled. However, if another mode is set, it will
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2914 * affect it (eg: server-close/keep-alive + httpclose = close). Note that we
2915 * avoid to redo the same work if FE and BE have the same settings (common).
2916 * The method consists in checking if options changed between the two calls
2917 * (implying that either one is non-null, or one of them is non-null and we
2918 * are there for the first time.
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2919 */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2920
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2921 del_cl = del_ka = 0;
2922
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]2923 if ((!(txn->flags & TX_HDR_CONN_PRS) &&
2924 (s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) ||
2925 ((s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) !=
2926 (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]2927 int tmp = TX_CON_WANT_TUN;
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2928
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2929 if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE)
2930 tmp = TX_CON_WANT_KAL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2931 if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO)
2932 tmp = TX_CON_WANT_SCL;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2933 if ((s->fe->options|s->be->options) & PR_O_FORCE_CLO)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2934 tmp = TX_CON_WANT_CLO;
2935
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2936 if ((txn->flags & TX_CON_WANT_MSK) < tmp)
2937 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2938
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2939 if (!(txn->flags & TX_HDR_CONN_PRS)) {
2940 /* parse the Connection header and possibly clean it */
2941 int to_del = 0;
2942 if ((txn->flags & TX_REQ_VER_11) ||
2943 (txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL)
2944 to_del |= 2; /* remove "keep-alive" */
2945 if (!(txn->flags & TX_REQ_VER_11))
2946 to_del |= 1; /* remove "close" */
2947 http_parse_connection_header(txn, msg, req, to_del);
Willy Tarreau0dfdf192010-01-05 11:33:11 +0100[diff] [blame]2948 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2949
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2950 /* check if client or config asks for explicit close in KAL/SCL */
2951 if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
2952 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
2953 ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */
2954 (txn->flags & (TX_REQ_VER_11|TX_HDR_CONN_KAL)) == 0 || /* no "connection: k-a" in 1.0 */
2955 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) || /* httpclose + any = forceclose */
Willy Tarreauc3e8b252010-01-28 15:01:20 +0100[diff] [blame]2956 !(txn->flags & TX_REQ_XFER_LEN) || /* no length known => close */
2957 s->fe->state == PR_STSTOPPED)) /* frontend is stopping */
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]2958 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
2959 }
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2960
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2961 /* add request headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]2962 list_for_each_entry(wl, &px->req_add, list) {
Willy Tarreau8abd4cd2010-01-31 14:30:44 +0100[diff] [blame]2963 if (wl->cond) {
2964 int ret = acl_exec_cond(wl->cond, px, s, txn, ACL_DIR_REQ);
2965 ret = acl_pass(ret);
2966 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
2967 ret = !ret;
2968 if (!ret)
2969 continue;
2970 }
2971
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]2972 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]2973 goto return_bad_req;
2974 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]2975
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2976 if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_HTTP_AUTH) {
2977 struct chunk msg;
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2978 char *realm = req_acl->http_auth.realm;
Krzysztof Piotr Oledzki59bb2182010-01-29 17:58:21 +0100[diff] [blame]2979
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2980 if (!realm)
2981 realm = do_stats?STATS_DEFAULT_REALM:px->id;
2982
Willy Tarreau844a7e72010-01-31 21:46:18 +0100[diff] [blame]2983 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]2984 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
2985 txn->status = 401;
2986 stream_int_retnclose(req->prod, &msg);
2987 goto return_prx_cond;
2988 }
2989
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2990 if (do_stats) {
2991 /* We need to provied stats for this request.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2992 * FIXME!!! that one is rather dangerous, we want to
2993 * make it follow standard rules (eg: clear req->analysers).
2994 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]2995
2996 s->logs.tv_request = now;
2997 s->data_source = DATA_SRC_STATS;
2998 s->data_state = DATA_ST_INIT;
2999 s->task->nice = -32; /* small boost for HTTP statistics */
3000 stream_int_register_handler(s->rep->prod, http_stats_io_handler);
3001 s->rep->prod->private = s;
3002 s->rep->prod->st0 = s->rep->prod->st1 = 0;
3003 req->analysers = 0;
3004
3005 return 0;
3006
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3007 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]3008
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3009 /* check whether we have some ACLs set to redirect this request */
3010 list_for_each_entry(rule, &px->redirect_rules, list) {
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3011 int ret = ACL_PAT_PASS;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3012
Willy Tarreauf285f542010-01-03 20:03:03 +0100[diff] [blame]3013 if (rule->cond) {
3014 ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
3015 ret = acl_pass(ret);
3016 if (rule->cond->pol == ACL_COND_UNLESS)
3017 ret = !ret;
3018 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3019
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3020 if (ret) {
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3021 struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 };
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3022 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3023
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3024 /* build redirect message */
3025 switch(rule->code) {
3026 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3027 msg_fmt = HTTP_303;
3028 break;
3029 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3030 msg_fmt = HTTP_301;
3031 break;
3032 case 302:
3033 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3034 msg_fmt = HTTP_302;
3035 break;
3036 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3037
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]3038 if (unlikely(!chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3039 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3040
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3041 switch(rule->type) {
3042 case REDIRECT_TYPE_PREFIX: {
3043 const char *path;
3044 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3045
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3046 path = http_get_path(txn);
3047 /* build message using path */
3048 if (path) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3049 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]3050 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
3051 int qs = 0;
3052 while (qs < pathlen) {
3053 if (path[qs] == '?') {
3054 pathlen = qs;
3055 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3056 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3057 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3058 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3059 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3060 } else {
3061 path = "/";
3062 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3063 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3064
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3065 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3066 goto return_bad_req;
3067
3068 /* add prefix. Note that if prefix == "/", we don't want to
3069 * add anything, otherwise it makes it hard for the user to
3070 * configure a self-redirection.
3071 */
3072 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3073 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3074 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3075 }
3076
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3077 /* add path */
3078 memcpy(rdr.str + rdr.len, path, pathlen);
3079 rdr.len += pathlen;
Willy Tarreau81e3b4f2010-01-10 00:42:19 +0100[diff] [blame]3080
3081 /* append a slash at the end of the location is needed and missing */
3082 if (rdr.len && rdr.str[rdr.len - 1] != '/' &&
3083 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
3084 if (rdr.len > rdr.size - 5)
3085 goto return_bad_req;
3086 rdr.str[rdr.len] = '/';
3087 rdr.len++;
3088 }
3089
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3090 break;
3091 }
3092 case REDIRECT_TYPE_LOCATION:
3093 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]3094 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3095 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3096
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3097 /* add location */
3098 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
3099 rdr.len += rule->rdr_len;
3100 break;
3101 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3102
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3103 if (rule->cookie_len) {
3104 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
3105 rdr.len += 14;
3106 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
3107 rdr.len += rule->cookie_len;
3108 memcpy(rdr.str + rdr.len, "\r\n", 2);
3109 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3110 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]3111
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3112 /* add end of headers and the keep-alive/close status.
3113 * We may choose to set keep-alive if the Location begins
3114 * with a slash, because the client will come back to the
3115 * same server.
3116 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3117 txn->status = rule->code;
3118 /* let's log the request time */
3119 s->logs.tv_request = now;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3120
3121 if (rule->rdr_len >= 1 && *rule->rdr_str == '/' &&
3122 (txn->flags & TX_REQ_XFER_LEN) &&
3123 !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.hdr_content_len &&
3124 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
3125 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
3126 /* keep-alive possible */
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3127 if (!(txn->flags & TX_REQ_VER_11)) {
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3128 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3129 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: keep-alive", 30);
3130 rdr.len += 30;
3131 } else {
3132 memcpy(rdr.str + rdr.len, "\r\nConnection: keep-alive", 24);
3133 rdr.len += 24;
3134 }
Willy Tarreau75661452010-01-10 10:35:01 +0100[diff] [blame]3135 }
3136 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
3137 rdr.len += 4;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3138 buffer_write(req->prod->ob, rdr.str, rdr.len);
3139 /* "eat" the request */
3140 buffer_ignore(req, msg->sov - msg->som);
3141 msg->som = msg->sov;
3142 req->analysers = AN_REQ_HTTP_XFER_BODY;
Willy Tarreau9300fb22010-01-05 00:58:24 +0100[diff] [blame]3143 s->rep->analysers = AN_RES_HTTP_XFER_BODY;
3144 txn->req.msg_state = HTTP_MSG_CLOSED;
3145 txn->rsp.msg_state = HTTP_MSG_DONE;
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3146 break;
3147 } else {
3148 /* keep-alive not possible */
Willy Tarreau88d349d2010-01-25 12:15:43 +0100[diff] [blame]3149 if (unlikely(txn->flags & TX_USE_PX_CONN)) {
3150 memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29);
3151 rdr.len += 29;
3152 } else {
3153 memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23);
3154 rdr.len += 23;
3155 }
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]3156 stream_int_retnclose(req->prod, &rdr);
Willy Tarreaua9679ac2010-01-03 17:32:57 +0100[diff] [blame]3157 goto return_prx_cond;
3158 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3159 }
3160 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3161
Willy Tarreau2be39392010-01-03 17:24:51 +0100[diff] [blame]3162 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
3163 * If this happens, then the data will not come immediately, so we must
3164 * send all what we have without waiting. Note that due to the small gain
3165 * in waiting for the body of the request, it's easier to simply put the
3166 * BF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
3167 * itself once used.
3168 */
3169 req->flags |= BF_SEND_DONTWAIT;
3170
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3171 /* that's OK for us now, let's move on to next analysers */
3172 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]3173
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3174 return_bad_req:
3175 /* We centralize bad requests processing here */
3176 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
3177 /* we detected a parsing error. We want to archive this request
3178 * in the dedicated proxy area for later troubleshooting.
3179 */
3180 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
3181 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]3182
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3183 txn->req.msg_state = HTTP_MSG_ERROR;
3184 txn->status = 400;
3185 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3186
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3187 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3188 if (s->listener->counters)
3189 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]3190
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3191 return_prx_cond:
3192 if (!(s->flags & SN_ERR_MASK))
3193 s->flags |= SN_ERR_PRXCOND;
3194 if (!(s->flags & SN_FINST_MASK))
3195 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]3196
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3197 req->analysers = 0;
3198 req->analyse_exp = TICK_ETERNITY;
3199 return 0;
3200}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3201
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3202/* This function performs all the processing enabled for the current request.
3203 * It returns 1 if the processing can continue on next analysers, or zero if it
3204 * needs more data, encounters an error, or wants to immediately abort the
3205 * request. It relies on buffers flags, and updates s->req->analysers.
3206 */
3207int http_process_request(struct session *s, struct buffer *req, int an_bit)
3208{
3209 struct http_txn *txn = &s->txn;
3210 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3211
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3212 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3213 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3214 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]3215 return 0;
3216 }
3217
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3218 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3219 now_ms, __FUNCTION__,
3220 s,
3221 req,
3222 req->rex, req->wex,
3223 req->flags,
3224 req->l,
3225 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3226
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3227 /*
3228 * Right now, we know that we have processed the entire headers
3229 * and that unwanted requests have been filtered out. We can do
3230 * whatever we want with the remaining request. Also, now we
3231 * may have separate values for ->fe, ->be.
3232 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3233
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3234 /*
3235 * If HTTP PROXY is set we simply get remote server address
3236 * parsing incoming request.
3237 */
3238 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3239 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]3240 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3241
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3242 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3243 * 7: Now we can work with the cookies.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3244 * Note that doing so might move headers in the request, but
3245 * the fields will stay coherent and the URI will not move.
3246 * This should only be performed in the backend.
3247 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]3248 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3249 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
3250 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]3251
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3252 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]3253 * 8: the appsession cookie was looked up very early in 1.2,
3254 * so let's do the same now.
3255 */
3256
3257 /* It needs to look into the URI */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]3258 if ((txn->sessid == NULL) && s->be->appsession_name) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3259 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]3260 }
3261
3262 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3263 * 9: add X-Forwarded-For if either the frontend or the backend
3264 * asks for it.
3265 */
3266 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
3267 if (s->cli_addr.ss_family == AF_INET) {
3268 /* Add an X-Forwarded-For header unless the source IP is
3269 * in the 'except' network range.
3270 */
3271 if ((!s->fe->except_mask.s_addr ||
3272 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr)
3273 != s->fe->except_net.s_addr) &&
3274 (!s->be->except_mask.s_addr ||
3275 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr)
3276 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3277 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3278 unsigned char *pn;
3279 pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3280
3281 /* Note: we rely on the backend to get the header name to be used for
3282 * x-forwarded-for, because the header is really meant for the backends.
3283 * However, if the backend did not specify any option, we have to rely
3284 * on the frontend's header name.
3285 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3286 if (s->be->fwdfor_hdr_len) {
3287 len = s->be->fwdfor_hdr_len;
3288 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]3289 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3290 len = s->fe->fwdfor_hdr_len;
3291 memcpy(trash, s->fe->fwdfor_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3292 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3293 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]3294
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]3295 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3296 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3297 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3298 }
3299 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3300 else if (s->cli_addr.ss_family == AF_INET6) {
3301 /* FIXME: for the sake of completeness, we should also support
3302 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3303 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3304 int len;
3305 char pn[INET6_ADDRSTRLEN];
3306 inet_ntop(AF_INET6,
3307 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
3308 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3309
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3310 /* Note: we rely on the backend to get the header name to be used for
3311 * x-forwarded-for, because the header is really meant for the backends.
3312 * However, if the backend did not specify any option, we have to rely
3313 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3314 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3315 if (s->be->fwdfor_hdr_len) {
3316 len = s->be->fwdfor_hdr_len;
3317 memcpy(trash, s->be->fwdfor_hdr_name, len);
3318 } else {
3319 len = s->fe->fwdfor_hdr_len;
3320 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]3321 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3322 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3323
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3324 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3325 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3326 goto return_bad_req;
3327 }
3328 }
3329
3330 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3331 * 10: add X-Original-To if either the frontend or the backend
3332 * asks for it.
3333 */
3334 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
3335
3336 /* FIXME: don't know if IPv6 can handle that case too. */
3337 if (s->cli_addr.ss_family == AF_INET) {
3338 /* Add an X-Original-To header unless the destination IP is
3339 * in the 'except' network range.
3340 */
3341 if (!(s->flags & SN_FRT_ADDR_SET))
3342 get_frt_addr(s);
3343
3344 if ((!s->fe->except_mask_to.s_addr ||
3345 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
3346 != s->fe->except_to.s_addr) &&
3347 (!s->be->except_mask_to.s_addr ||
3348 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
3349 != s->be->except_to.s_addr)) {
3350 int len;
3351 unsigned char *pn;
3352 pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr;
3353
3354 /* Note: we rely on the backend to get the header name to be used for
3355 * x-original-to, because the header is really meant for the backends.
3356 * However, if the backend did not specify any option, we have to rely
3357 * on the frontend's header name.
3358 */
3359 if (s->be->orgto_hdr_len) {
3360 len = s->be->orgto_hdr_len;
3361 memcpy(trash, s->be->orgto_hdr_name, len);
3362 } else {
3363 len = s->fe->orgto_hdr_len;
3364 memcpy(trash, s->fe->orgto_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3365 }
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3366 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
3367
3368 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3369 &txn->hdr_idx, trash, len) < 0))
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3370 goto return_bad_req;
3371 }
3372 }
3373 }
3374
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3375 /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set. */
3376 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
3377 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) {
3378 unsigned int want_flags = 0;
3379
3380 if (txn->flags & TX_REQ_VER_11) {
3381 if ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL ||
3382 ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE))
3383 want_flags |= TX_CON_CLO_SET;
3384 } else {
3385 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)
3386 want_flags |= TX_CON_KAL_SET;
3387 }
3388
3389 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
3390 http_change_connection_header(txn, msg, req, want_flags);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3391 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3392
Willy Tarreaubbf0b372010-01-18 16:54:40 +0100[diff] [blame]3393
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3394 /* If we have no server assigned yet and we're balancing on url_param
3395 * with a POST request, we may be interested in checking the body for
3396 * that parameter. This will be done in another analyser.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3397 */
3398 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
3399 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3400 s->be->url_param_post_limit != 0 &&
3401 (txn->flags & (TX_REQ_CNT_LEN|TX_REQ_TE_CHNK)) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]3402 memchr(msg->sol + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3403 buffer_dont_connect(req);
3404 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3405 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3406
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3407 if (txn->flags & TX_REQ_XFER_LEN)
3408 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]3409
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3410 /*************************************************************
3411 * OK, that's finished for the headers. We have done what we *
3412 * could. Let's switch to the DATA state. *
3413 ************************************************************/
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3414 req->analyse_exp = TICK_ETERNITY;
3415 req->analysers &= ~an_bit;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3416
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3417 s->logs.tv_request = now;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3418 /* OK let's go on with the BODY now */
3419 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3420
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3421 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3422 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3423 /* we detected a parsing error. We want to archive this request
3424 * in the dedicated proxy area for later troubleshooting.
3425 */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3426 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3427 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3428
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3429 txn->req.msg_state = HTTP_MSG_ERROR;
3430 txn->status = 400;
3431 req->analysers = 0;
3432 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3433
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3434 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3435 if (s->listener->counters)
3436 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3437
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3438 if (!(s->flags & SN_ERR_MASK))
3439 s->flags |= SN_ERR_PRXCOND;
3440 if (!(s->flags & SN_FINST_MASK))
3441 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3442 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3443}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3444
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3445/* This function is an analyser which processes the HTTP tarpit. It always
3446 * returns zero, at the beginning because it prevents any other processing
3447 * from occurring, and at the end because it terminates the request.
3448 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3449int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3450{
3451 struct http_txn *txn = &s->txn;
3452
3453 /* This connection is being tarpitted. The CLIENT side has
3454 * already set the connect expiration date to the right
3455 * timeout. We just have to check that the client is still
3456 * there and that the timeout has not expired.
3457 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3458 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3459 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
3460 !tick_is_expired(req->analyse_exp, now_ms))
3461 return 0;
3462
3463 /* We will set the queue timer to the time spent, just for
3464 * logging purposes. We fake a 500 server error, so that the
3465 * attacker will not suspect his connection has been tarpitted.
3466 * It will not cause trouble to the logs because we can exclude
3467 * the tarpitted connections by filtering on the 'PT' status flags.
3468 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3469 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
3470
3471 txn->status = 500;
3472 if (req->flags != BF_READ_ERROR)
3473 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
3474
3475 req->analysers = 0;
3476 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3477
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3478 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3479 if (s->listener->counters)
3480 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3481
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3482 if (!(s->flags & SN_ERR_MASK))
3483 s->flags |= SN_ERR_PRXCOND;
3484 if (!(s->flags & SN_FINST_MASK))
3485 s->flags |= SN_FINST_T;
3486 return 0;
3487}
3488
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3489/* This function is an analyser which processes the HTTP request body. It looks
3490 * for parameters to be used for the load balancing algorithm (url_param). It
3491 * must only be called after the standard HTTP request processing has occurred,
3492 * because it expects the request to be parsed. It returns zero if it needs to
3493 * read more data, or 1 once it has completed its analysis.
3494 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3495int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3496{
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3497 struct http_txn *txn = &s->txn;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3498 struct http_msg *msg = &s->txn.req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3499 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3500
3501 /* We have to parse the HTTP request body to find any required data.
3502 * "balance url_param check_post" should have been the only way to get
3503 * into this. We were brought here after HTTP header analysis, so all
3504 * related structures are ready.
3505 */
3506
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3507 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3508 goto missing_data;
3509
3510 if (msg->msg_state < HTTP_MSG_100_SENT) {
3511 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3512 * send an HTTP/1.1 100 Continue intermediate response.
3513 */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]3514 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3515 struct hdr_ctx ctx;
3516 ctx.idx = 0;
3517 /* Expect is allowed in 1.1, look for it */
3518 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3519 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3520 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3521 }
3522 }
3523 msg->msg_state = HTTP_MSG_100_SENT;
3524 }
3525
3526 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3527 /* we have msg->col and msg->sov which both point to the first
3528 * byte of message body. msg->som still points to the beginning
3529 * of the message. We must save the body in req->lr because it
3530 * survives buffer re-alignments.
3531 */
3532 req->lr = req->data + msg->sov;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3533 if (txn->flags & TX_REQ_TE_CHNK)
3534 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3535 else
3536 msg->msg_state = HTTP_MSG_DATA;
3537 }
3538
3539 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3540 /* read the chunk size and assign it to ->hdr_content_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3541 * set ->sov and ->lr to point to the body and switch to DATA or
3542 * TRAILERS state.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3543 */
3544 int ret = http_parse_chunk_size(req, msg);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3545
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3546 if (!ret)
3547 goto missing_data;
3548 else if (ret < 0)
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3549 goto return_bad_req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3550 }
3551
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3552 /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3553 * We have the first non-header byte in msg->col, which is either the
3554 * beginning of the chunk size or of the data. The first data byte is in
3555 * msg->sov, which is equal to msg->col when not using transfer-encoding.
3556 * We're waiting for at least <url_param_post_limit> bytes after msg->sov.
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3557 */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3558
3559 if (msg->hdr_content_len < limit)
3560 limit = msg->hdr_content_len;
3561
Willy Tarreau7c96f672009-12-27 22:47:25 +0100[diff] [blame]3562 if (req->l - (msg->sov - msg->som) >= limit) /* we have enough bytes now */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3563 goto http_end;
3564
3565 missing_data:
3566 /* we get here if we need to wait for more data */
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3567 if (req->flags & BF_FULL)
3568 goto return_bad_req;
3569
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3570 if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
3571 txn->status = 408;
3572 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
3573 goto return_err_msg;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3574 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3575
3576 /* we get here if we need to wait for more data */
3577 if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3578 /* Not enough data. We'll re-use the http-request
3579 * timeout here. Ideally, we should set the timeout
3580 * relative to the accept() date. We just set the
3581 * request timeout once at the beginning of the
3582 * request.
3583 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3584 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3585 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]3586 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3587 return 0;
3588 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3589
3590 http_end:
3591 /* The situation will not evolve, so let's give up on the analysis. */
3592 s->logs.tv_request = now; /* update the request timer to reflect full request */
3593 req->analysers &= ~an_bit;
3594 req->analyse_exp = TICK_ETERNITY;
3595 return 1;
3596
3597 return_bad_req: /* let's centralize all bad requests */
3598 txn->req.msg_state = HTTP_MSG_ERROR;
3599 txn->status = 400;
3600 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
3601
3602 return_err_msg:
3603 req->analysers = 0;
3604 s->fe->counters.failed_req++;
3605 if (s->listener->counters)
3606 s->listener->counters->failed_req++;
3607
3608 if (!(s->flags & SN_ERR_MASK))
3609 s->flags |= SN_ERR_PRXCOND;
3610 if (!(s->flags & SN_FINST_MASK))
3611 s->flags |= SN_FINST_R;
3612 return 0;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3613}
3614
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3615/* Terminate current transaction and prepare a new one. This is very tricky
3616 * right now but it works.
3617 */
3618void http_end_txn_clean_session(struct session *s)
3619{
3620 /* FIXME: We need a more portable way of releasing a backend's and a
3621 * server's connections. We need a safer way to reinitialize buffer
3622 * flags. We also need a more accurate method for computing per-request
3623 * data.
3624 */
3625 http_silent_debug(__LINE__, s);
3626
3627 s->req->cons->flags |= SI_FL_NOLINGER;
3628 s->req->cons->shutr(s->req->cons);
3629 s->req->cons->shutw(s->req->cons);
3630
3631 http_silent_debug(__LINE__, s);
3632
3633 if (s->flags & SN_BE_ASSIGNED)
3634 s->be->beconn--;
3635
3636 s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
3637 session_process_counters(s);
3638
3639 if (s->txn.status) {
3640 int n;
3641
3642 n = s->txn.status / 100;
3643 if (n < 1 || n > 5)
3644 n = 0;
3645
3646 if (s->fe->mode == PR_MODE_HTTP)
3647 s->fe->counters.p.http.rsp[n]++;
3648
3649 if ((s->flags & SN_BE_ASSIGNED) && (s->fe != s->be) &&
3650 (s->be->mode == PR_MODE_HTTP))
3651 s->be->counters.p.http.rsp[n]++;
3652 }
3653
3654 /* don't count other requests' data */
3655 s->logs.bytes_in -= s->req->l - s->req->send_max;
3656 s->logs.bytes_out -= s->rep->l - s->rep->send_max;
3657
3658 /* let's do a final log if we need it */
3659 if (s->logs.logwait &&
3660 !(s->flags & SN_MONITOR) &&
3661 (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
3662 s->do_log(s);
3663 }
3664
3665 s->logs.accept_date = date; /* user-visible date for logging */
3666 s->logs.tv_accept = now; /* corrected date for internal use */
3667 tv_zero(&s->logs.tv_request);
3668 s->logs.t_queue = -1;
3669 s->logs.t_connect = -1;
3670 s->logs.t_data = -1;
3671 s->logs.t_close = 0;
3672 s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
3673 s->logs.srv_queue_size = 0; /* we will get this number soon */
3674
3675 s->logs.bytes_in = s->req->total = s->req->l - s->req->send_max;
3676 s->logs.bytes_out = s->rep->total = s->rep->l - s->rep->send_max;
3677
3678 if (s->pend_pos)
3679 pendconn_free(s->pend_pos);
3680
3681 if (s->srv) {
3682 if (s->flags & SN_CURR_SESS) {
3683 s->flags &= ~SN_CURR_SESS;
3684 s->srv->cur_sess--;
3685 }
3686 if (may_dequeue_tasks(s->srv, s->be))
3687 process_srv_queue(s->srv);
3688 }
3689
3690 if (unlikely(s->srv_conn))
3691 sess_change_server(s, NULL);
3692 s->srv = NULL;
3693
3694 s->req->cons->state = s->req->cons->prev_state = SI_ST_INI;
3695 s->req->cons->fd = -1; /* just to help with debugging */
3696 s->req->cons->err_type = SI_ET_NONE;
3697 s->req->cons->err_loc = NULL;
3698 s->req->cons->exp = TICK_ETERNITY;
3699 s->req->cons->flags = SI_FL_NONE;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3700 s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST);
3701 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);
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]3702 s->flags &= ~(SN_DIRECT|SN_ASSIGNED|SN_ADDR_SET|SN_BE_ASSIGNED|SN_FORCE_PRST);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3703 s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE);
3704 s->txn.meth = 0;
3705 http_reset_txn(s);
Willy Tarreaufcffa692010-01-10 14:21:19 +0100[diff] [blame]3706 s->txn.flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3707 if (s->be->options2 & PR_O2_INDEPSTR)
3708 s->req->cons->flags |= SI_FL_INDEP_STR;
3709
3710 /* if the request buffer is not empty, it means we're
3711 * about to process another request, so send pending
3712 * data with MSG_MORE to merge TCP packets when possible.
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3713 * Just don't do this if the buffer is close to be full,
3714 * because the request will wait for it to flush a little
3715 * bit before proceeding.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3716 */
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3717 if (s->req->l > s->req->send_max) {
3718 if (s->rep->send_max &&
3719 !(s->rep->flags & BF_FULL) &&
Willy Tarreau065e8332010-01-08 00:30:20 +0100[diff] [blame]3720 s->rep->r <= s->rep->data + s->rep->size - global.tune.maxrewrite)
3721 s->rep->flags |= BF_EXPECT_MORE;
3722 }
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3723
3724 /* we're removing the analysers, we MUST re-enable events detection */
3725 buffer_auto_read(s->req);
3726 buffer_auto_close(s->req);
3727 buffer_auto_read(s->rep);
3728 buffer_auto_close(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3729
3730 /* make ->lr point to the first non-forwarded byte */
3731 s->req->lr = s->req->w + s->req->send_max;
3732 if (s->req->lr >= s->req->data + s->req->size)
3733 s->req->lr -= s->req->size;
3734 s->rep->lr = s->rep->w + s->rep->send_max;
3735 if (s->rep->lr >= s->rep->data + s->rep->size)
3736 s->rep->lr -= s->req->size;
3737
3738 s->req->analysers |= s->fe->fe_req_ana;
3739 s->rep->analysers = 0;
3740
3741 http_silent_debug(__LINE__, s);
3742}
3743
3744
3745/* This function updates the request state machine according to the response
3746 * state machine and buffer flags. It returns 1 if it changes anything (flag
3747 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
3748 * it is only used to find when a request/response couple is complete. Both
3749 * this function and its equivalent should loop until both return zero. It
3750 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
3751 */
3752int http_sync_req_state(struct session *s)
3753{
3754 struct buffer *buf = s->req;
3755 struct http_txn *txn = &s->txn;
3756 unsigned int old_flags = buf->flags;
3757 unsigned int old_state = txn->req.msg_state;
3758
3759 http_silent_debug(__LINE__, s);
3760 if (unlikely(txn->req.msg_state < HTTP_MSG_BODY))
3761 return 0;
3762
3763 if (txn->req.msg_state == HTTP_MSG_DONE) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3764 /* No need to read anymore, the request was completely parsed.
3765 * We can shut the read side unless we want to abort_on_close.
3766 */
3767 if (buf->cons->state == SI_ST_EST || !(s->be->options & PR_O_ABRT_CLOSE))
3768 buffer_dont_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3769
3770 if (txn->rsp.msg_state == HTTP_MSG_ERROR)
3771 goto wait_other_side;
3772
3773 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
3774 /* The server has not finished to respond, so we
3775 * don't want to move in order not to upset it.
3776 */
3777 goto wait_other_side;
3778 }
3779
3780 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
3781 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3782 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3783 txn->req.msg_state = HTTP_MSG_TUNNEL;
3784 goto wait_other_side;
3785 }
3786
3787 /* When we get here, it means that both the request and the
3788 * response have finished receiving. Depending on the connection
3789 * mode, we'll have to wait for the last bytes to leave in either
3790 * direction, and sometimes for a close to be effective.
3791 */
3792
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3793 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
3794 /* Server-close mode : queue a connection close to the server */
3795 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW)))
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3796 buffer_shutw_now(buf);
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3797 }
3798 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
3799 /* Option forceclose is set, or either side wants to close,
3800 * let's enforce it now that we're not expecting any new
3801 * data to come. The caller knows the session is complete
3802 * once both states are CLOSED.
3803 */
3804 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3805 buffer_shutr_now(buf);
3806 buffer_shutw_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3807 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3808 }
3809 else {
3810 /* The last possible modes are keep-alive and tunnel. Since tunnel
3811 * mode does not set the body analyser, we can't reach this place
3812 * in tunnel mode, so we're left with keep-alive only.
3813 * This mode is currently not implemented, we switch to tunnel mode.
3814 */
3815 buffer_auto_read(buf);
3816 txn->req.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3817 }
3818
3819 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
3820 /* if we've just closed an output, let's switch */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3821 buf->cons->flags |= SI_FL_NOLINGER; /* we want to close ASAP */
3822
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3823 if (!(buf->flags & BF_OUT_EMPTY)) {
3824 txn->req.msg_state = HTTP_MSG_CLOSING;
3825 goto http_msg_closing;
3826 }
3827 else {
3828 txn->req.msg_state = HTTP_MSG_CLOSED;
3829 goto http_msg_closed;
3830 }
3831 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3832 goto wait_other_side;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3833 }
3834
3835 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
3836 http_msg_closing:
3837 /* nothing else to forward, just waiting for the output buffer
3838 * to be empty and for the shutw_now to take effect.
3839 */
3840 if (buf->flags & BF_OUT_EMPTY) {
3841 txn->req.msg_state = HTTP_MSG_CLOSED;
3842 goto http_msg_closed;
3843 }
3844 else if (buf->flags & BF_SHUTW) {
3845 txn->req.msg_state = HTTP_MSG_ERROR;
3846 goto wait_other_side;
3847 }
3848 }
3849
3850 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
3851 http_msg_closed:
3852 goto wait_other_side;
3853 }
3854
3855 wait_other_side:
3856 http_silent_debug(__LINE__, s);
3857 return txn->req.msg_state != old_state || buf->flags != old_flags;
3858}
3859
3860
3861/* This function updates the response state machine according to the request
3862 * state machine and buffer flags. It returns 1 if it changes anything (flag
3863 * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
3864 * it is only used to find when a request/response couple is complete. Both
3865 * this function and its equivalent should loop until both return zero. It
3866 * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
3867 */
3868int http_sync_res_state(struct session *s)
3869{
3870 struct buffer *buf = s->rep;
3871 struct http_txn *txn = &s->txn;
3872 unsigned int old_flags = buf->flags;
3873 unsigned int old_state = txn->rsp.msg_state;
3874
3875 http_silent_debug(__LINE__, s);
3876 if (unlikely(txn->rsp.msg_state < HTTP_MSG_BODY))
3877 return 0;
3878
3879 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
3880 /* In theory, we don't need to read anymore, but we must
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3881 * still monitor the server connection for a possible close
3882 * while the request is being uploaded, so we don't disable
3883 * reading.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3884 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3885 /* buffer_dont_read(buf); */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3886
3887 if (txn->req.msg_state == HTTP_MSG_ERROR)
3888 goto wait_other_side;
3889
3890 if (txn->req.msg_state < HTTP_MSG_DONE) {
3891 /* The client seems to still be sending data, probably
3892 * because we got an error response during an upload.
3893 * We have the choice of either breaking the connection
3894 * or letting it pass through. Let's do the later.
3895 */
3896 goto wait_other_side;
3897 }
3898
3899 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
3900 /* if any side switches to tunnel mode, the other one does too */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3901 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3902 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
3903 goto wait_other_side;
3904 }
3905
3906 /* When we get here, it means that both the request and the
3907 * response have finished receiving. Depending on the connection
3908 * mode, we'll have to wait for the last bytes to leave in either
3909 * direction, and sometimes for a close to be effective.
3910 */
3911
3912 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
3913 /* Server-close mode : shut read and wait for the request
3914 * side to close its output buffer. The caller will detect
3915 * when we're in DONE and the other is in CLOSED and will
3916 * catch that for the final cleanup.
3917 */
3918 if (!(buf->flags & (BF_SHUTR|BF_SHUTR_NOW)))
3919 buffer_shutr_now(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3920 }
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3921 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
3922 /* Option forceclose is set, or either side wants to close,
3923 * let's enforce it now that we're not expecting any new
3924 * data to come. The caller knows the session is complete
3925 * once both states are CLOSED.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3926 */
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3927 if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) {
3928 buffer_shutr_now(buf);
3929 buffer_shutw_now(buf);
3930 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3931 }
3932 else {
Willy Tarreaucce7fa42010-01-16 23:19:39 +0100[diff] [blame]3933 /* The last possible modes are keep-alive and tunnel. Since tunnel
3934 * mode does not set the body analyser, we can't reach this place
3935 * in tunnel mode, so we're left with keep-alive only.
3936 * This mode is currently not implemented, we switch to tunnel mode.
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3937 */
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3938 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3939 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3940 }
3941
3942 if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
3943 /* if we've just closed an output, let's switch */
3944 if (!(buf->flags & BF_OUT_EMPTY)) {
3945 txn->rsp.msg_state = HTTP_MSG_CLOSING;
3946 goto http_msg_closing;
3947 }
3948 else {
3949 txn->rsp.msg_state = HTTP_MSG_CLOSED;
3950 goto http_msg_closed;
3951 }
3952 }
3953 goto wait_other_side;
3954 }
3955
3956 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
3957 http_msg_closing:
3958 /* nothing else to forward, just waiting for the output buffer
3959 * to be empty and for the shutw_now to take effect.
3960 */
3961 if (buf->flags & BF_OUT_EMPTY) {
3962 txn->rsp.msg_state = HTTP_MSG_CLOSED;
3963 goto http_msg_closed;
3964 }
3965 else if (buf->flags & BF_SHUTW) {
3966 txn->rsp.msg_state = HTTP_MSG_ERROR;
3967 goto wait_other_side;
3968 }
3969 }
3970
3971 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
3972 http_msg_closed:
3973 /* drop any pending data */
3974 buffer_ignore(buf, buf->l - buf->send_max);
3975 buffer_auto_close(buf);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3976 buffer_auto_read(buf);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3977 goto wait_other_side;
3978 }
3979
3980 wait_other_side:
3981 http_silent_debug(__LINE__, s);
3982 return txn->rsp.msg_state != old_state || buf->flags != old_flags;
3983}
3984
3985
3986/* Resync the request and response state machines. Return 1 if either state
3987 * changes.
3988 */
3989int http_resync_states(struct session *s)
3990{
3991 struct http_txn *txn = &s->txn;
3992 int old_req_state = txn->req.msg_state;
3993 int old_res_state = txn->rsp.msg_state;
3994
3995 http_silent_debug(__LINE__, s);
3996 http_sync_req_state(s);
3997 while (1) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]3998 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]3999 if (!http_sync_res_state(s))
4000 break;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4001 http_silent_debug(__LINE__, s);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4002 if (!http_sync_req_state(s))
4003 break;
4004 }
4005 http_silent_debug(__LINE__, s);
4006 /* OK, both state machines agree on a compatible state.
4007 * There are a few cases we're interested in :
4008 * - HTTP_MSG_TUNNEL on either means we have to disable both analysers
4009 * - HTTP_MSG_CLOSED on both sides means we've reached the end in both
4010 * directions, so let's simply disable both analysers.
4011 * - HTTP_MSG_CLOSED on the response only means we must abort the
4012 * request.
4013 * - HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE on the response
4014 * with server-close mode means we've completed one request and we
4015 * must re-initialize the server connection.
4016 */
4017
4018 if (txn->req.msg_state == HTTP_MSG_TUNNEL ||
4019 txn->rsp.msg_state == HTTP_MSG_TUNNEL ||
4020 (txn->req.msg_state == HTTP_MSG_CLOSED &&
4021 txn->rsp.msg_state == HTTP_MSG_CLOSED)) {
4022 s->req->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4023 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4024 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4025 s->rep->analysers = 0;
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4026 buffer_auto_close(s->rep);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4027 buffer_auto_read(s->rep);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4028 }
Willy Tarreau2fa144c2010-01-04 23:13:26 +0100[diff] [blame]4029 else if (txn->rsp.msg_state == HTTP_MSG_CLOSED ||
4030 txn->rsp.msg_state == HTTP_MSG_ERROR ||
4031 (s->rep->flags & BF_SHUTW)) {
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4032 s->rep->analysers = 0;
4033 buffer_auto_close(s->rep);
4034 buffer_auto_read(s->rep);
4035 s->req->analysers = 0;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4036 buffer_abort(s->req);
4037 buffer_auto_close(s->req);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4038 buffer_auto_read(s->req);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4039 buffer_ignore(s->req, s->req->l - s->req->send_max);
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4040 }
4041 else if (txn->req.msg_state == HTTP_MSG_CLOSED &&
4042 txn->rsp.msg_state == HTTP_MSG_DONE &&
4043 ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)) {
4044 /* server-close: terminate this server connection and
4045 * reinitialize a fresh-new transaction.
4046 */
4047 http_end_txn_clean_session(s);
4048 }
4049
4050 http_silent_debug(__LINE__, s);
4051 return txn->req.msg_state != old_req_state ||
4052 txn->rsp.msg_state != old_res_state;
4053}
4054
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4055/* This function is an analyser which forwards request body (including chunk
4056 * sizes if any). It is called as soon as we must forward, even if we forward
4057 * zero byte. The only situation where it must not be called is when we're in
4058 * tunnel mode and we want to forward till the close. It's used both to forward
4059 * remaining data and to resync after end of body. It expects the msg_state to
4060 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4061 * read more data, or 1 once we can go on with next request or end the session.
4062 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
4063 * bytes of pending data + the headers if not already done (between som and sov).
4064 * It eventually adjusts som to match sov after the data in between have been sent.
4065 */
4066int http_request_forward_body(struct session *s, struct buffer *req, int an_bit)
4067{
4068 struct http_txn *txn = &s->txn;
4069 struct http_msg *msg = &s->txn.req;
4070
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4071 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4072 return 0;
4073
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4074 if ((req->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) ||
4075 ((req->flags & BF_SHUTW) && (req->to_forward || req->send_max))) {
4076 /* Output closed while we were sending data. We must abort. */
4077 buffer_ignore(req, req->l - req->send_max);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4078 buffer_auto_read(req);
4079 buffer_auto_close(req);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4080 req->analysers &= ~an_bit;
4081 return 1;
4082 }
4083
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]4084 buffer_dont_close(req);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4085
4086 /* Note that we don't have to send 100-continue back because we don't
4087 * need the data to complete our job, and it's up to the server to
4088 * decide whether to return 100, 417 or anything else in return of
4089 * an "Expect: 100-continue" header.
4090 */
4091
4092 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
4093 /* we have msg->col and msg->sov which both point to the first
4094 * byte of message body. msg->som still points to the beginning
4095 * of the message. We must save the body in req->lr because it
4096 * survives buffer re-alignments.
4097 */
4098 req->lr = req->data + msg->sov;
4099 if (txn->flags & TX_REQ_TE_CHNK)
4100 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4101 else {
4102 msg->msg_state = HTTP_MSG_DATA;
4103 }
4104 }
4105
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4106 while (1) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4107 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4108 /* we may have some data pending */
4109 if (msg->hdr_content_len || msg->som != msg->sov) {
4110 int bytes = msg->sov - msg->som;
4111 if (bytes < 0) /* sov may have wrapped at the end */
4112 bytes += req->size;
4113 buffer_forward(req, bytes + msg->hdr_content_len);
4114 msg->hdr_content_len = 0; /* don't forward that again */
4115 msg->som = msg->sov;
4116 }
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4117
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4118 if (msg->msg_state == HTTP_MSG_DATA) {
4119 /* must still forward */
4120 if (req->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4121 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4122
4123 /* nothing left to forward */
4124 if (txn->flags & TX_REQ_TE_CHNK)
4125 msg->msg_state = HTTP_MSG_DATA_CRLF;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4126 else
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4127 msg->msg_state = HTTP_MSG_DONE;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4128 }
4129 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4130 /* read the chunk size and assign it to ->hdr_content_len, then
4131 * set ->sov and ->lr to point to the body and switch to DATA or
4132 * TRAILERS state.
4133 */
4134 int ret = http_parse_chunk_size(req, msg);
4135
4136 if (!ret)
4137 goto missing_data;
4138 else if (ret < 0)
4139 goto return_bad_req;
4140 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4141 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4142 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
4143 /* we want the CRLF after the data */
4144 int ret;
4145
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]4146 req->lr = req->w + req->send_max;
4147 if (req->lr >= req->data + req->size)
4148 req->lr -= req->size;
4149
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4150 ret = http_skip_chunk_crlf(req, msg);
4151
4152 if (ret == 0)
4153 goto missing_data;
4154 else if (ret < 0)
4155 goto return_bad_req;
4156 /* we're in MSG_CHUNK_SIZE now */
4157 }
4158 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
4159 int ret = http_forward_trailers(req, msg);
4160
4161 if (ret == 0)
4162 goto missing_data;
4163 else if (ret < 0)
4164 goto return_bad_req;
4165 /* we're in HTTP_MSG_DONE now */
4166 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4167 else {
4168 /* other states, DONE...TUNNEL */
4169 if (http_resync_states(s)) {
4170 /* some state changes occurred, maybe the analyser
4171 * was disabled too.
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]4172 */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4173 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
4174 goto return_bad_req;
4175 return 1;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4176 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4177 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4178 }
4179 }
4180
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4181 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4182 /* stop waiting for data if the input is closed before the end */
4183 if (req->flags & BF_SHUTR)
4184 goto return_bad_req;
4185
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4186 /* waiting for the last bits to leave the buffer */
4187 if (req->flags & BF_SHUTW)
4188 goto return_bad_req;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4189
4190 http_silent_debug(__LINE__, s);
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4191 return 0;
4192
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4193 return_bad_req: /* let's centralize all bad requests */
4194 txn->req.msg_state = HTTP_MSG_ERROR;
4195 txn->status = 400;
4196 /* Note: we don't send any error if some data were already sent */
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]4197 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]4198 req->analysers = 0;
4199 s->fe->counters.failed_req++;
4200 if (s->listener->counters)
4201 s->listener->counters->failed_req++;
4202
4203 if (!(s->flags & SN_ERR_MASK))
4204 s->flags |= SN_ERR_PRXCOND;
4205 if (!(s->flags & SN_FINST_MASK))
4206 s->flags |= SN_FINST_R;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4207 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4208 return 0;
4209}
4210
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4211/* This stream analyser waits for a complete HTTP response. It returns 1 if the
4212 * processing can continue on next analysers, or zero if it either needs more
4213 * data or wants to immediately abort the response (eg: timeout, error, ...). It
4214 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
4215 * when it has nothing left to do, and may remove any analyser when it wants to
4216 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4217 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4218int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]4219{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4220 struct http_txn *txn = &s->txn;
4221 struct http_msg *msg = &txn->rsp;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4222 struct hdr_ctx ctx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4223 int use_close_only;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4224 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4225 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]4226
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4227 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]4228 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4229 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4230 rep,
4231 rep->rex, rep->wex,
4232 rep->flags,
4233 rep->l,
4234 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]4235
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4236 /*
4237 * Now parse the partial (or complete) lines.
4238 * We will check the response syntax, and also join multi-line
4239 * headers. An index of all the lines will be elaborated while
4240 * parsing.
4241 *
4242 * For the parsing, we use a 28 states FSM.
4243 *
4244 * Here is the information we currently have :
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4245 * rep->data + msg->som = beginning of response
4246 * rep->data + msg->eoh = end of processed headers / start of current one
4247 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4248 * rep->lr = first non-visited byte
4249 * rep->r = end of data
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4250 * Once we reach MSG_BODY, rep->sol = rep->data + msg->som
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4251 */
4252
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4253 /* There's a protected area at the end of the buffer for rewriting
4254 * purposes. We don't want to start to parse the request if the
4255 * protected area is affected, because we may have to move processed
4256 * data later, which is much more complicated.
4257 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4258 if (rep->l && msg->msg_state < HTTP_MSG_ERROR) {
4259 if (unlikely((rep->flags & BF_FULL) ||
4260 rep->r < rep->lr ||
4261 rep->r > rep->data + rep->size - global.tune.maxrewrite)) {
4262 if (rep->send_max) {
4263 /* some data has still not left the buffer, wake us once that's done */
4264 buffer_dont_close(rep);
4265 rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
4266 return 0;
4267 }
4268 if (rep->l <= rep->size - global.tune.maxrewrite)
4269 http_buffer_heavy_realign(rep, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4270 }
4271
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]4272 if (likely(rep->lr < rep->r))
4273 http_msg_analyzer(rep, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]4274 }
4275
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4276 /* 1: we might have to print this header in debug mode */
4277 if (unlikely((global.mode & MODE_DEBUG) &&
4278 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4279 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4280 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4281
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4282 sol = msg->sol;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4283 eol = sol + msg->sl.rq.l;
4284 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4285
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4286 sol += hdr_idx_first_pos(&txn->hdr_idx);
4287 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4288
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4289 while (cur_idx) {
4290 eol = sol + txn->hdr_idx.v[cur_idx].len;
4291 debug_hdr("srvhdr", s, sol, eol);
4292 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
4293 cur_idx = txn->hdr_idx.v[cur_idx].next;
4294 }
4295 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4296
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4297 /*
4298 * Now we quickly check if we have found a full valid response.
4299 * If not so, we check the FD and buffer states before leaving.
4300 * A full response is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4301 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4302 * responses are checked first.
4303 *
4304 * Depending on whether the client is still there or not, we
4305 * may send an error response back or not. Note that normally
4306 * we should only check for HTTP status there, and check I/O
4307 * errors somewhere else.
4308 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4309
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4310 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4311 /* Invalid response */
4312 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
4313 /* we detected a parsing error. We want to archive this response
4314 * in the dedicated proxy area for later troubleshooting.
4315 */
4316 hdr_response_bad:
4317 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
4318 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
4319
4320 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4321 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4322 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4323 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
4324 }
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4325
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4326 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4327 rep->analysers = 0;
4328 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4329 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4330 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4331 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
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_H;
4337
4338 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4339 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4340
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4341 /* too large response does not fit in buffer. */
4342 else if (rep->flags & BF_FULL) {
4343 goto hdr_response_bad;
4344 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4345
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4346 /* read error */
4347 else if (rep->flags & BF_READ_ERROR) {
4348 if (msg->err_pos >= 0)
4349 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4350
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4351 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4352 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4353 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4354 health_adjust(s->srv, HANA_STATUS_HTTP_READ_ERROR);
4355 }
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]4356
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4357 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4358 rep->analysers = 0;
4359 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4360 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4361 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4362 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4363
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4364 if (!(s->flags & SN_ERR_MASK))
4365 s->flags |= SN_ERR_SRVCL;
4366 if (!(s->flags & SN_FINST_MASK))
4367 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]4368 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4369 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4370
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4371 /* read timeout : return a 504 to the client. */
4372 else if (rep->flags & BF_READ_TIMEOUT) {
4373 if (msg->err_pos >= 0)
4374 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4375
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4376 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4377 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4378 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4379 health_adjust(s->srv, HANA_STATUS_HTTP_READ_TIMEOUT);
4380 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4381
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4382 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4383 rep->analysers = 0;
4384 txn->status = 504;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4385 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4386 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4387 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4388
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4389 if (!(s->flags & SN_ERR_MASK))
4390 s->flags |= SN_ERR_SRVTO;
4391 if (!(s->flags & SN_FINST_MASK))
4392 s->flags |= SN_FINST_H;
4393 return 0;
4394 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]4395
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4396 /* close from server */
4397 else if (rep->flags & BF_SHUTR) {
4398 if (msg->err_pos >= 0)
4399 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4400
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4401 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4402 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4403 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4404 health_adjust(s->srv, HANA_STATUS_HTTP_BROKEN_PIPE);
4405 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4406
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4407 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4408 rep->analysers = 0;
4409 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4410 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4411 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4412 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4413
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4414 if (!(s->flags & SN_ERR_MASK))
4415 s->flags |= SN_ERR_SRVCL;
4416 if (!(s->flags & SN_FINST_MASK))
4417 s->flags |= SN_FINST_H;
4418 return 0;
4419 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4420
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4421 /* write error to client (we don't send any message then) */
4422 else if (rep->flags & BF_WRITE_ERROR) {
4423 if (msg->err_pos >= 0)
4424 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]4425
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4426 s->be->counters.failed_resp++;
4427 rep->analysers = 0;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4428 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4429
4430 if (!(s->flags & SN_ERR_MASK))
4431 s->flags |= SN_ERR_CLICL;
4432 if (!(s->flags & SN_FINST_MASK))
4433 s->flags |= SN_FINST_H;
4434
4435 /* process_session() will take care of the error */
4436 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4437 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4438
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4439 buffer_dont_close(rep);
4440 return 0;
4441 }
4442
4443 /* More interesting part now : we know that we have a complete
4444 * response which at least looks like HTTP. We have an indicator
4445 * of each header's length, so we can parse them quickly.
4446 */
4447
4448 if (unlikely(msg->err_pos >= 0))
4449 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
4450
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4451 /*
4452 * 1: get the status code
4453 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4454 n = msg->sol[msg->sl.st.c] - '0';
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4455 if (n < 1 || n > 5)
4456 n = 0;
4457 s->srv->counters.p.http.rsp[n]++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4458
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4459 /* check if the response is HTTP/1.1 or above */
4460 if ((msg->sl.st.v_l == 8) &&
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4461 ((msg->sol[5] > '1') ||
4462 ((msg->sol[5] == '1') &&
4463 (msg->sol[7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4464 txn->flags |= TX_RES_VER_11;
4465
4466 /* "connection" has not been parsed yet */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4467 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]4468
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4469 /* transfer length unknown*/
4470 txn->flags &= ~TX_RES_XFER_LEN;
4471
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4472 txn->status = strl2ui(msg->sol + msg->sl.st.c, msg->sl.st.c_l);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4473
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4474 if (txn->status >= 100 && txn->status < 500)
4475 health_adjust(s->srv, HANA_STATUS_HTTP_OK);
4476 else
4477 health_adjust(s->srv, HANA_STATUS_HTTP_STS);
4478
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4479 /*
4480 * 2: check for cacheability.
4481 */
4482
4483 switch (txn->status) {
4484 case 200:
4485 case 203:
4486 case 206:
4487 case 300:
4488 case 301:
4489 case 410:
4490 /* RFC2616 @13.4:
4491 * "A response received with a status code of
4492 * 200, 203, 206, 300, 301 or 410 MAY be stored
4493 * by a cache (...) unless a cache-control
4494 * directive prohibits caching."
4495 *
4496 * RFC2616 @9.5: POST method :
4497 * "Responses to this method are not cacheable,
4498 * unless the response includes appropriate
4499 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4500 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4501 if (likely(txn->meth != HTTP_METH_POST) &&
4502 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
4503 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4504 break;
4505 default:
4506 break;
4507 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4508
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4509 /*
4510 * 3: we may need to capture headers
4511 */
4512 s->logs.logwait &= ~LW_RESP;
4513 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap))
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4514 capture_headers(msg->sol, &txn->hdr_idx,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4515 txn->rsp.cap, s->fe->rsp_cap);
4516
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4517 /* 4: determine the transfer-length.
4518 * According to RFC2616 #4.4, amended by the HTTPbis working group,
4519 * the presence of a message-body in a RESPONSE and its transfer length
4520 * must be determined that way :
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4521 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4522 * All responses to the HEAD request method MUST NOT include a
4523 * message-body, even though the presence of entity-header fields
4524 * might lead one to believe they do. All 1xx (informational), 204
4525 * (No Content), and 304 (Not Modified) responses MUST NOT include a
4526 * message-body. All other responses do include a message-body,
4527 * although it MAY be of zero length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4528 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4529 * 1. Any response which "MUST NOT" include a message-body (such as the
4530 * 1xx, 204 and 304 responses and any response to a HEAD request) is
4531 * always terminated by the first empty line after the header fields,
4532 * regardless of the entity-header fields present in the message.
4533 *
4534 * 2. If a Transfer-Encoding header field (Section 9.7) is present and
4535 * the "chunked" transfer-coding (Section 6.2) is used, the
4536 * transfer-length is defined by the use of this transfer-coding.
4537 * If a Transfer-Encoding header field is present and the "chunked"
4538 * transfer-coding is not present, the transfer-length is defined by
4539 * the sender closing the connection.
4540 *
4541 * 3. If a Content-Length header field is present, its decimal value in
4542 * OCTETs represents both the entity-length and the transfer-length.
4543 * If a message is received with both a Transfer-Encoding header
4544 * field and a Content-Length header field, the latter MUST be ignored.
4545 *
4546 * 4. If the message uses the media type "multipart/byteranges", and
4547 * the transfer-length is not otherwise specified, then this self-
4548 * delimiting media type defines the transfer-length. This media
4549 * type MUST NOT be used unless the sender knows that the recipient
4550 * can parse it; the presence in a request of a Range header with
4551 * multiple byte-range specifiers from a 1.1 client implies that the
4552 * client can parse multipart/byteranges responses.
4553 *
4554 * 5. By the server closing the connection.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4555 */
4556
4557 /* Skip parsing if no content length is possible. The response flags
4558 * 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]4559 * the real header value, and we note that we know the response's length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4560 * FIXME: should we parse anyway and return an error on chunked encoding ?
4561 */
4562 if (txn->meth == HTTP_METH_HEAD ||
4563 (txn->status >= 100 && txn->status < 200) ||
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4564 txn->status == 204 || txn->status == 304) {
4565 txn->flags |= TX_RES_XFER_LEN;
4566 goto skip_content_length;
4567 }
4568
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4569 use_close_only = 0;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4570 ctx.idx = 0;
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]4571 while ((txn->flags & TX_RES_VER_11) &&
4572 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4573 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
4574 txn->flags |= (TX_RES_TE_CHNK | TX_RES_XFER_LEN);
4575 else if (txn->flags & TX_RES_TE_CHNK) {
4576 /* bad transfer-encoding (chunked followed by something else) */
4577 use_close_only = 1;
4578 txn->flags &= ~(TX_RES_TE_CHNK | TX_RES_XFER_LEN);
4579 break;
4580 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4581 }
4582
4583 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
4584 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4585 while (!(txn->flags & TX_RES_TE_CHNK) && !use_close_only &&
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4586 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
4587 signed long long cl;
4588
4589 if (!ctx.vlen)
4590 goto hdr_response_bad;
4591
4592 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
4593 goto hdr_response_bad; /* parse failure */
4594
4595 if (cl < 0)
4596 goto hdr_response_bad;
4597
4598 if ((txn->flags & TX_RES_CNT_LEN) && (msg->hdr_content_len != cl))
4599 goto hdr_response_bad; /* already specified, was different */
4600
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4601 txn->flags |= TX_RES_CNT_LEN | TX_RES_XFER_LEN;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4602 msg->hdr_content_len = cl;
4603 }
4604
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4605 /* FIXME: we should also implement the multipart/byterange method.
4606 * For now on, we resort to close mode in this case (unknown length).
4607 */
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4608skip_content_length:
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]4609
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4610 /* end of job, return OK */
4611 rep->analysers &= ~an_bit;
4612 rep->analyse_exp = TICK_ETERNITY;
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4613 buffer_auto_close(rep);
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4614 return 1;
4615}
4616
4617/* This function performs all the processing enabled for the current response.
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]4618 * It normally returns 1 unless it wants to break. It relies on buffers flags,
4619 * and updates t->rep->analysers. It might make sense to explode it into several
4620 * other functions. It works like process_request (see indications above).
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4621 */
4622int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
4623{
4624 struct http_txn *txn = &t->txn;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4625 struct http_msg *msg = &txn->rsp;
4626 struct proxy *cur_proxy;
Willy Tarreauf4f04122010-01-28 18:10:50 +0100[diff] [blame]4627 struct cond_wordlist *wl;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4628
4629 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
4630 now_ms, __FUNCTION__,
4631 t,
4632 rep,
4633 rep->rex, rep->wex,
4634 rep->flags,
4635 rep->l,
4636 rep->analysers);
4637
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4638 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4639 return 0;
4640
4641 rep->analysers &= ~an_bit;
4642 rep->analyse_exp = TICK_ETERNITY;
4643
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4644 /* Now we have to check if we need to modify the Connection header.
4645 * This is more difficult on the response than it is on the request,
4646 * because we can have two different HTTP versions and we don't know
4647 * how the client will interprete a response. For instance, let's say
4648 * that the client sends a keep-alive request in HTTP/1.0 and gets an
4649 * HTTP/1.1 response without any header. Maybe it will bound itself to
4650 * HTTP/1.0 because it only knows about it, and will consider the lack
4651 * of header as a close, or maybe it knows HTTP/1.1 and can consider
4652 * the lack of header as a keep-alive. Thus we will use two flags
4653 * indicating how a request MAY be understood by the client. In case
4654 * of multiple possibilities, we'll fix the header to be explicit. If
4655 * ambiguous cases such as both close and keepalive are seen, then we
4656 * will fall back to explicit close. Note that we won't take risks with
4657 * HTTP/1.0 clients which may not necessarily understand keep-alive.
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4658 * See doc/internals/connection-header.txt for the complete matrix.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4659 */
4660
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4661 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
4662 txn->status == 101)) {
4663 /* Either we've established an explicit tunnel, or we're
4664 * switching the protocol. In both cases, we're very unlikely
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4665 * to understand the next protocols. We have to switch to tunnel
4666 * mode, so that we transfer the request and responses then let
4667 * this protocol pass unmodified. When we later implement specific
4668 * parsers for such protocols, we'll want to check the Upgrade
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4669 * header which contains information about that protocol for
4670 * responses with status 101 (eg: see RFC2817 about TLS).
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4671 */
4672 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
4673 }
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4674 else if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) &&
4675 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN ||
4676 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE))) {
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4677 int to_del = 0;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4678
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4679 /* on unknown transfer length, we must close */
4680 if (!(txn->flags & TX_RES_XFER_LEN) &&
4681 (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
4682 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4683
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4684 /* now adjust header transformations depending on current state */
4685 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN ||
4686 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
4687 to_del |= 2; /* remove "keep-alive" on any response */
4688 if (!(txn->flags & TX_RES_VER_11))
4689 to_del |= 1; /* remove "close" for HTTP/1.0 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4690 }
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4691 else { /* SCL / KAL */
4692 to_del |= 1; /* remove "close" on any response */
4693 if ((txn->flags & (TX_RES_VER_11|TX_REQ_VER_11)) == (TX_RES_VER_11|TX_REQ_VER_11))
4694 to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4695 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4696
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4697 /* Parse and remove some headers from the connection header */
4698 http_parse_connection_header(txn, msg, rep, to_del);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4699
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4700 /* Some keep-alive responses are converted to Server-close if
4701 * the server wants to close.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4702 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4703 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) {
4704 if ((txn->flags & TX_HDR_CONN_CLO) ||
4705 (txn->flags & (TX_HDR_CONN_KAL|TX_RES_VER_11)) == 0)
4706 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4707 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4708 }
4709
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4710 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4711 /*
4712 * 3: we will have to evaluate the filters.
4713 * As opposed to version 1.2, now they will be evaluated in the
4714 * filters order and not in the header order. This means that
4715 * each filter has to be validated among all headers.
4716 *
4717 * Filters are tried with ->be first, then with ->fe if it is
4718 * different from ->be.
4719 */
4720
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4721 cur_proxy = t->be;
4722 while (1) {
4723 struct proxy *rule_set = cur_proxy;
4724
4725 /* try headers filters */
4726 if (rule_set->rsp_exp != NULL) {
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]4727 if (apply_filters_to_response(t, rep, rule_set) < 0) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4728 return_bad_resp:
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4729 if (t->srv) {
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4730 t->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4731 health_adjust(t->srv, HANA_STATUS_HTTP_RSP);
4732 }
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4733 cur_proxy->counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4734 return_srv_prx_502:
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]4735 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4736 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4737 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau0b89fbb2010-02-02 09:57:24 +0100[diff] [blame]4738 buffer_ignore(rep, rep->l - rep->send_max);
Willy Tarreau8e89b842009-10-18 23:56:35 +0200[diff] [blame]4739 stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4740 if (!(t->flags & SN_ERR_MASK))
4741 t->flags |= SN_ERR_PRXCOND;
4742 if (!(t->flags & SN_FINST_MASK))
4743 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]4744 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4745 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4746 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4747
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4748 /* has the response been denied ? */
4749 if (txn->flags & TX_SVDENY) {
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]4750 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4751 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4752
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4753 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4754 if (t->listener->counters)
4755 t->listener->counters->denied_resp++;
4756
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4757 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]4758 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4759
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4760 /* add response headers from the rule sets in the same order */
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]4761 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4762 if (txn->status < 200)
4763 break;
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]4764 if (wl->cond) {
4765 int ret = acl_exec_cond(wl->cond, px, t, txn, ACL_DIR_RTR);
4766 ret = acl_pass(ret);
4767 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
4768 ret = !ret;
4769 if (!ret)
4770 continue;
4771 }
Willy Tarreaudeb9ed82010-01-03 21:03:22 +0100[diff] [blame]4772 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]4773 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]4774 }
4775
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4776 /* check whether we're already working on the frontend */
4777 if (cur_proxy == t->fe)
4778 break;
4779 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4780 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4781
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4782 /*
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4783 * We may be facing a 100-continue response, in which case this
4784 * is not the right response, and we're waiting for the next one.
4785 * Let's allow this response to go to the client and wait for the
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4786 * next one.
4787 */
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4788 if (unlikely(txn->status == 100)) {
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4789 hdr_idx_init(&txn->hdr_idx);
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]4790 buffer_forward(rep, rep->lr - msg->sol);
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4791 msg->msg_state = HTTP_MSG_RPBEFORE;
4792 txn->status = 0;
4793 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
4794 return 1;
4795 }
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4796 else if (unlikely(txn->status < 200))
4797 goto skip_header_mangling;
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4798
4799 /* we don't have any 1xx status code now */
4800
4801 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4802 * 4: check for server cookie.
4803 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4804 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name ||
4805 (t->be->options & PR_O_CHK_CACHE))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4806 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4807
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4808
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4809 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4810 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4811 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4812 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4813 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4814
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4815 /*
4816 * 6: add server cookie in the response if needed
4817 */
4818 if ((t->srv) && !(t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_INS) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4819 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST))) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4820 int len;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4821
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4822 /* the server is known, it's not the one the client requested, we have to
4823 * insert a set-cookie here, except if we want to insert only on POST
4824 * requests and this one isn't. Note that servers which don't have cookies
4825 * (eg: some backup servers) will return a full cookie removal request.
4826 */
4827 len = sprintf(trash, "Set-Cookie: %s=%s; path=/",
4828 t->be->cookie_name,
4829 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]4830
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4831 if (t->be->cookie_domain)
4832 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4833
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4834 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4835 trash, len) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4836 goto return_bad_resp;
4837 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4838
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4839 /* Here, we will tell an eventual cache on the client side that we don't
4840 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
4841 * Some caches understand the correct form: 'no-cache="set-cookie"', but
4842 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
4843 */
4844 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4845
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4846 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4847
4848 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4849 "Cache-control: private", 22) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4850 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4851 }
4852 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4853
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4854 /*
4855 * 7: check if result will be cacheable with a cookie.
4856 * We'll block the response if security checks have caught
4857 * nasty things such as a cacheable cookie.
4858 */
4859 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) ==
4860 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4861 (t->be->options & PR_O_CHK_CACHE)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4862
4863 /* we're in presence of a cacheable response containing
4864 * a set-cookie header. We'll block it as requested by
4865 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4866 */
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]4867 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4868 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4869
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4870 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4871 if (t->listener->counters)
4872 t->listener->counters->denied_resp++;
4873
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4874 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
4875 t->be->id, t->srv?t->srv->id:"<dispatch>");
4876 send_log(t->be, LOG_ALERT,
4877 "Blocking cacheable cookie in response from instance %s, server %s.\n",
4878 t->be->id, t->srv?t->srv->id:"<dispatch>");
4879 goto return_srv_prx_502;
4880 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4881
4882 /*
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4883 * 8: adjust "Connection: close" or "Connection: keep-alive" if needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4884 */
Willy Tarreau60466522010-01-18 19:08:45 +0100[diff] [blame]4885 if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) ||
4886 ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE)) {
4887 unsigned int want_flags = 0;
4888
4889 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
4890 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4891 /* we want a keep-alive response here. Keep-alive header
4892 * required if either side is not 1.1.
4893 */
4894 if ((txn->flags & (TX_REQ_VER_11|TX_RES_VER_11)) != (TX_REQ_VER_11|TX_RES_VER_11))
4895 want_flags |= TX_CON_KAL_SET;
4896 }
4897 else {
4898 /* we want a close response here. Close header required if
4899 * the server is 1.1, regardless of the client.
4900 */
4901 if (txn->flags & TX_RES_VER_11)
4902 want_flags |= TX_CON_CLO_SET;
4903 }
4904
4905 if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
4906 http_change_connection_header(txn, msg, rep, want_flags);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4907 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4908
Willy Tarreau5843d1a2010-02-01 15:13:32 +0100[diff] [blame]4909 skip_header_mangling:
Willy Tarreaudc008c52010-02-01 16:20:08 +0100[diff] [blame]4910 if ((txn->flags & TX_RES_XFER_LEN) ||
4911 (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN)
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4912 rep->analysers |= AN_RES_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]4913
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4914 /*************************************************************
4915 * OK, that's finished for the headers. We have done what we *
4916 * could. Let's switch to the DATA state. *
4917 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4918
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4919 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4920
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4921 /* if the user wants to log as soon as possible, without counting
4922 * bytes from the server, then this is the right moment. We have
4923 * to temporarily assign bytes_out to log what we currently have.
4924 */
4925 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
4926 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
4927 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]4928 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4929 t->logs.bytes_out = 0;
4930 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4931
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4932 /* Note: we must not try to cheat by jumping directly to DATA,
4933 * otherwise we would not let the client side wake up.
4934 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4935
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]4936 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4937 }
Willy Tarreaue3fa6e52010-01-04 22:57:43 +0100[diff] [blame]4938 return 1;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4939}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4940
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4941/* This function is an analyser which forwards response body (including chunk
4942 * sizes if any). It is called as soon as we must forward, even if we forward
4943 * zero byte. The only situation where it must not be called is when we're in
4944 * tunnel mode and we want to forward till the close. It's used both to forward
4945 * remaining data and to resync after end of body. It expects the msg_state to
4946 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4947 * read more data, or 1 once we can go on with next request or end the session.
4948 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
4949 * bytes of pending data + the headers if not already done (between som and sov).
4950 * It eventually adjusts som to match sov after the data in between have been sent.
4951 */
4952int http_response_forward_body(struct session *s, struct buffer *res, int an_bit)
4953{
4954 struct http_txn *txn = &s->txn;
4955 struct http_msg *msg = &s->txn.rsp;
4956
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]4957 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4958 return 0;
4959
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4960 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]4961 ((res->flags & BF_SHUTW) && (res->to_forward || res->send_max)) ||
Willy Tarreau6c2cbe12010-01-03 17:07:49 +0100[diff] [blame]4962 !s->req->analysers) {
4963 /* in case of error or if the other analyser went away, we can't analyse HTTP anymore */
4964 buffer_ignore(res, res->l - res->send_max);
Willy Tarreau90deb182010-01-07 00:20:41 +0100[diff] [blame]4965 buffer_auto_read(res);
4966 buffer_auto_close(res);
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4967 res->analysers &= ~an_bit;
4968 return 1;
4969 }
4970
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]4971 buffer_dont_close(res);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4972
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4973 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
4974 /* we have msg->col and msg->sov which both point to the first
4975 * byte of message body. msg->som still points to the beginning
4976 * of the message. We must save the body in req->lr because it
4977 * survives buffer re-alignments.
4978 */
4979 res->lr = res->data + msg->sov;
4980 if (txn->flags & TX_RES_TE_CHNK)
4981 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4982 else {
4983 msg->msg_state = HTTP_MSG_DATA;
4984 }
4985 }
4986
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4987 while (1) {
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]4988 http_silent_debug(__LINE__, s);
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4989 /* we may have some data pending */
4990 if (msg->hdr_content_len || msg->som != msg->sov) {
4991 int bytes = msg->sov - msg->som;
4992 if (bytes < 0) /* sov may have wrapped at the end */
4993 bytes += res->size;
4994 buffer_forward(res, bytes + msg->hdr_content_len);
4995 msg->hdr_content_len = 0; /* don't forward that again */
4996 msg->som = msg->sov;
4997 }
4998
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]4999 if (msg->msg_state == HTTP_MSG_DATA) {
5000 /* must still forward */
5001 if (res->to_forward)
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5002 goto missing_data;
Willy Tarreaucaabe412010-01-03 23:08:28 +0100[diff] [blame]5003
5004 /* nothing left to forward */
5005 if (txn->flags & TX_RES_TE_CHNK)
5006 msg->msg_state = HTTP_MSG_DATA_CRLF;
5007 else
5008 msg->msg_state = HTTP_MSG_DONE;
5009 }
5010 else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5011 /* read the chunk size and assign it to ->hdr_content_len, then
5012 * set ->sov to point to the body and switch to DATA or TRAILERS state.
5013 */
5014 int ret = http_parse_chunk_size(res, msg);
5015
5016 if (!ret)
5017 goto missing_data;
5018 else if (ret < 0)
5019 goto return_bad_res;
5020 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5021 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5022 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
5023 /* we want the CRLF after the data */
5024 int ret;
5025
Willy Tarreaud3347ee2010-01-04 02:02:25 +0100[diff] [blame]5026 res->lr = res->w + res->send_max;
5027 if (res->lr >= res->data + res->size)
5028 res->lr -= res->size;
5029
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5030 ret = http_skip_chunk_crlf(res, msg);
5031
5032 if (!ret)
5033 goto missing_data;
5034 else if (ret < 0)
5035 goto return_bad_res;
5036 /* we're in MSG_CHUNK_SIZE now */
5037 }
5038 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
5039 int ret = http_forward_trailers(res, msg);
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5040
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5041 if (ret == 0)
5042 goto missing_data;
5043 else if (ret < 0)
5044 goto return_bad_res;
5045 /* we're in HTTP_MSG_DONE now */
5046 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5047 else {
5048 /* other states, DONE...TUNNEL */
5049 if (http_resync_states(s)) {
5050 http_silent_debug(__LINE__, s);
5051 /* some state changes occurred, maybe the analyser
5052 * was disabled too.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5053 */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5054 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
5055 goto return_bad_res;
5056 return 1;
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]5057 }
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5058 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5059 }
5060 }
5061
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5062 missing_data:
Willy Tarreauf5c8bd62010-01-04 07:10:34 +0100[diff] [blame]5063 /* stop waiting for data if the input is closed before the end */
5064 if (res->flags & BF_SHUTR)
5065 goto return_bad_res;
5066
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5067 if (!s->req->analysers)
5068 goto return_bad_res;
5069
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5070 /* forward the chunk size as well as any pending data */
5071 if (msg->hdr_content_len || msg->som != msg->sov) {
5072 buffer_forward(res, msg->sov - msg->som + msg->hdr_content_len);
5073 msg->hdr_content_len = 0; /* don't forward that again */
5074 msg->som = msg->sov;
5075 }
5076
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5077 /* the session handler will take care of timeouts and errors */
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5078 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5079 return 0;
5080
5081 return_bad_res: /* let's centralize all bad resuests */
5082 txn->rsp.msg_state = HTTP_MSG_ERROR;
5083 txn->status = 502;
Willy Tarreau148d0992010-01-10 10:21:21 +0100[diff] [blame]5084 /* don't send any error message as we're in the body */
5085 stream_int_retnclose(res->cons, NULL);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5086 res->analysers = 0;
5087 s->be->counters.failed_resp++;
5088 if (s->srv) {
5089 s->srv->counters.failed_resp++;
5090 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
5091 }
5092
5093 if (!(s->flags & SN_ERR_MASK))
5094 s->flags |= SN_ERR_PRXCOND;
5095 if (!(s->flags & SN_FINST_MASK))
5096 s->flags |= SN_FINST_R;
Willy Tarreau610ecce2010-01-04 21:15:02 +0100[diff] [blame]5097 http_silent_debug(__LINE__, s);
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]5098 return 0;
5099}
5100
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5101/* Iterate the same filter through all request headers.
5102 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5103 * Since it can manage the switch to another backend, it updates the per-proxy
5104 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5105 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5106int 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]5107{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5108 char term;
5109 char *cur_ptr, *cur_end, *cur_next;
5110 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5111 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5112 struct hdr_idx_elem *cur_hdr;
5113 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]5114
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5115 last_hdr = 0;
5116
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5117 cur_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5118 old_idx = 0;
5119
5120 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5121 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5122 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5123 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5124 (exp->action == ACT_ALLOW ||
5125 exp->action == ACT_DENY ||
5126 exp->action == ACT_TARPIT))
5127 return 0;
5128
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5129 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5130 if (!cur_idx)
5131 break;
5132
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5133 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5134 cur_ptr = cur_next;
5135 cur_end = cur_ptr + cur_hdr->len;
5136 cur_next = cur_end + cur_hdr->cr + 1;
5137
5138 /* Now we have one header between cur_ptr and cur_end,
5139 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5140 */
5141
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5142 /* The annoying part is that pattern matching needs
5143 * that we modify the contents to null-terminate all
5144 * strings before testing them.
5145 */
5146
5147 term = *cur_end;
5148 *cur_end = '\0';
5149
5150 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5151 switch (exp->action) {
5152 case ACT_SETBE:
5153 /* It is not possible to jump a second time.
5154 * FIXME: should we return an HTTP/500 here so that
5155 * the admin knows there's a problem ?
5156 */
5157 if (t->be != t->fe)
5158 break;
5159
5160 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5161 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5162 last_hdr = 1;
5163 break;
5164
5165 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5166 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5167 last_hdr = 1;
5168 break;
5169
5170 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5171 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5172 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5173
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5174 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5175 if (t->listener->counters)
5176 t->listener->counters->denied_resp++;
5177
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5178 break;
5179
5180 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5181 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5182 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5183
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5184 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5185 if (t->listener->counters)
5186 t->listener->counters->denied_resp++;
5187
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5188 break;
5189
5190 case ACT_REPLACE:
5191 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5192 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5193 /* FIXME: if the user adds a newline in the replacement, the
5194 * index will not be recalculated for now, and the new line
5195 * will not be counted as a new header.
5196 */
5197
5198 cur_end += delta;
5199 cur_next += delta;
5200 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5201 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5202 break;
5203
5204 case ACT_REMOVE:
5205 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
5206 cur_next += delta;
5207
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5208 http_msg_move_end(&txn->req, delta);
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5209 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5210 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5211 cur_hdr->len = 0;
5212 cur_end = NULL; /* null-term has been rewritten */
5213 break;
5214
5215 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5216 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5217 if (cur_end)
5218 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5219
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5220 /* keep the link from this header to next one in case of later
5221 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5222 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5223 old_idx = cur_idx;
5224 }
5225 return 0;
5226}
5227
5228
5229/* Apply the filter to the request line.
5230 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5231 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5232 * Since it can manage the switch to another backend, it updates the per-proxy
5233 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5234 */
5235int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
5236{
5237 char term;
5238 char *cur_ptr, *cur_end;
5239 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5240 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5241 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5242
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5243
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5244 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5245 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5246 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5247 (exp->action == ACT_ALLOW ||
5248 exp->action == ACT_DENY ||
5249 exp->action == ACT_TARPIT))
5250 return 0;
5251 else if (exp->action == ACT_REMOVE)
5252 return 0;
5253
5254 done = 0;
5255
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5256 cur_ptr = txn->req.sol;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5257 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5258
5259 /* Now we have the request line between cur_ptr and cur_end */
5260
5261 /* The annoying part is that pattern matching needs
5262 * that we modify the contents to null-terminate all
5263 * strings before testing them.
5264 */
5265
5266 term = *cur_end;
5267 *cur_end = '\0';
5268
5269 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5270 switch (exp->action) {
5271 case ACT_SETBE:
5272 /* It is not possible to jump a second time.
5273 * FIXME: should we return an HTTP/500 here so that
5274 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5275 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5276 if (t->be != t->fe)
5277 break;
5278
5279 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]5280 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5281 done = 1;
5282 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5283
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5284 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5285 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5286 done = 1;
5287 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5288
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5289 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5290 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5291
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5292 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5293 if (t->listener->counters)
5294 t->listener->counters->denied_resp++;
5295
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5296 done = 1;
5297 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5298
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5299 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5300 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5301
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]5302 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]5303 if (t->listener->counters)
5304 t->listener->counters->denied_resp++;
5305
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5306 done = 1;
5307 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5308
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5309 case ACT_REPLACE:
5310 *cur_end = term; /* restore the string terminator */
5311 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5312 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
5313 /* FIXME: if the user adds a newline in the replacement, the
5314 * index will not be recalculated for now, and the new line
5315 * will not be counted as a new header.
5316 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5317
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5318 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5319 cur_end += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5320 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5321 HTTP_MSG_RQMETH,
5322 cur_ptr, cur_end + 1,
5323 NULL, NULL);
5324 if (unlikely(!cur_end))
5325 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]5326
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5327 /* we have a full request and we know that we have either a CR
5328 * or an LF at <ptr>.
5329 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5330 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
5331 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]5332 /* there is no point trying this regex on headers */
5333 return 1;
5334 }
5335 }
5336 *cur_end = term; /* restore the string terminator */
5337 return done;
5338}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]5339
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5340
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5341
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5342/*
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5343 * 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]5344 * 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]5345 * unparsable request. Since it can manage the switch to another backend, it
5346 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5347 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5348int apply_filters_to_request(struct session *s, struct buffer *req, struct proxy *px)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5349{
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5350 struct http_txn *txn = &s->txn;
5351 struct hdr_exp *exp;
5352
5353 for (exp = px->req_exp; exp; exp = exp->next) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5354 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5355
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5356 /*
5357 * The interleaving of transformations and verdicts
5358 * makes it difficult to decide to continue or stop
5359 * the evaluation.
5360 */
5361
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5362 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
5363 break;
5364
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5365 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5366 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5367 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5368 continue;
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5369
5370 /* if this filter had a condition, evaluate it now and skip to
5371 * next filter if the condition does not match.
5372 */
5373 if (exp->cond) {
5374 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_REQ);
5375 ret = acl_pass(ret);
5376 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
5377 ret = !ret;
5378
5379 if (!ret)
5380 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5381 }
5382
5383 /* Apply the filter to the request line. */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5384 ret = apply_filter_to_req_line(s, req, exp);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5385 if (unlikely(ret < 0))
5386 return -1;
5387
5388 if (likely(ret == 0)) {
5389 /* The filter did not match the request, it can be
5390 * iterated through all headers.
5391 */
Willy Tarreau6c123b12010-01-28 20:22:06 +0100[diff] [blame]5392 apply_filter_to_req_headers(s, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5393 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5394 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5395 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5396}
5397
5398
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5399
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5400/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5401 * Try to retrieve the server associated to the appsession.
5402 * If the server is found, it's assigned to the session.
5403 */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5404void manage_client_side_appsession(struct session *t, const char *buf, int len) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5405 struct http_txn *txn = &t->txn;
5406 appsess *asession = NULL;
5407 char *sessid_temp = NULL;
5408
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5409 if (len > t->be->appsession_len) {
5410 len = t->be->appsession_len;
5411 }
5412
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5413 if (t->be->options2 & PR_O2_AS_REQL) {
5414 /* request-learn option is enabled : store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5415 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5416 /* 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]5417 pool_free2(apools.sessid, txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5418 }
5419
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5420 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5421 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5422 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5423 return;
5424 }
5425
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]5426 memcpy(txn->sessid, buf, len);
5427 txn->sessid[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5428 }
5429
5430 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
5431 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
5432 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
5433 return;
5434 }
5435
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5436 memcpy(sessid_temp, buf, len);
5437 sessid_temp[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5438
5439 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
5440 /* free previously allocated memory */
5441 pool_free2(apools.sessid, sessid_temp);
5442
5443 if (asession != NULL) {
5444 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
5445 if (!(t->be->options2 & PR_O2_AS_REQL))
5446 asession->request_count++;
5447
5448 if (asession->serverid != NULL) {
5449 struct server *srv = t->be->srv;
5450 while (srv) {
5451 if (strcmp(srv->id, asession->serverid) == 0) {
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]5452 if ((srv->state & SRV_RUNNING) ||
5453 (t->be->options & PR_O_PERSIST) ||
5454 (t->flags & SN_FORCE_PRST)) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5455 /* we found the server and it's usable */
5456 txn->flags &= ~TX_CK_MASK;
Willy Tarreau2a6d88d2010-01-24 13:10:43 +0100[diff] [blame]5457 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5458 t->flags |= SN_DIRECT | SN_ASSIGNED;
5459 t->srv = srv;
5460 break;
5461 } else {
5462 txn->flags &= ~TX_CK_MASK;
5463 txn->flags |= TX_CK_DOWN;
5464 }
5465 }
5466 srv = srv->next;
5467 }
5468 }
5469 }
5470}
5471
5472/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]5473 * Manage client-side cookie. It can impact performance by about 2% so it is
5474 * desirable to call it only when needed.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5475 */
5476void manage_client_side_cookies(struct session *t, struct buffer *req)
5477{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5478 struct http_txn *txn = &t->txn;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5479 char *p1, *p2, *p3, *p4, *p5;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5480 char *del_colon, *del_cookie, *colon;
5481 int app_cookies;
5482
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5483 char *cur_ptr, *cur_end, *cur_next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5484 int cur_idx, old_idx;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5485
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]5486 /* Iterate through the headers.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5487 * we start with the start line.
5488 */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]5489 old_idx = 0;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5490 cur_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5491
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5492 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5493 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5494 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5495
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5496 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5497 cur_ptr = cur_next;
5498 cur_end = cur_ptr + cur_hdr->len;
5499 cur_next = cur_end + cur_hdr->cr + 1;
5500
5501 /* We have one full header between cur_ptr and cur_end, and the
5502 * next header starts at cur_next. We're only interested in
5503 * "Cookie:" headers.
5504 */
5505
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5506 val = http_header_match2(cur_ptr, cur_end, "Cookie", 6);
5507 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5508 old_idx = cur_idx;
5509 continue;
5510 }
5511
5512 /* Now look for cookies. Conforming to RFC2109, we have to support
5513 * attributes whose name begin with a '$', and associate them with
5514 * the right cookie, if we want to delete this cookie.
5515 * So there are 3 cases for each cookie read :
5516 * 1) it's a special attribute, beginning with a '$' : ignore it.
5517 * 2) it's a server id cookie that we *MAY* want to delete : save
5518 * some pointers on it (last semi-colon, beginning of cookie...)
5519 * 3) it's an application cookie : we *MAY* have to delete a previous
5520 * "special" cookie.
5521 * At the end of loop, if a "special" cookie remains, we may have to
5522 * remove it. If no application cookie persists in the header, we
5523 * *MUST* delete it
5524 */
5525
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5526 colon = p1 = cur_ptr + val; /* first non-space char after 'Cookie:' */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5527
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5528 /* del_cookie == NULL => nothing to be deleted */
5529 del_colon = del_cookie = NULL;
5530 app_cookies = 0;
5531
5532 while (p1 < cur_end) {
5533 /* skip spaces and colons, but keep an eye on these ones */
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5534 resync_name:
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5535 while (p1 < cur_end) {
5536 if (*p1 == ';' || *p1 == ',')
5537 colon = p1;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]5538 else if (!isspace((unsigned char)*p1))
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5539 break;
5540 p1++;
5541 }
5542
5543 if (p1 == cur_end)
5544 break;
5545
5546 /* p1 is at the beginning of the cookie name */
5547 p2 = p1;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5548 while (p2 < cur_end && *p2 != '=') {
5549 if (*p2 == ',' || *p2 == ';' || isspace((unsigned char)*p2)) {
5550 /* oops, the cookie name was truncated, resync */
5551 p1 = p2;
5552 goto resync_name;
5553 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5554 p2++;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5555 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5556
5557 if (p2 == cur_end)
5558 break;
5559
5560 p3 = p2 + 1; /* skips the '=' sign */
5561 if (p3 == cur_end)
5562 break;
5563
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5564 /* parse the value, stripping leading and trailing spaces but keeping insiders. */
5565 p5 = p4 = p3;
5566 while (p5 < cur_end && *p5 != ';' && *p5 != ',') {
5567 if (!isspace((unsigned char)*p5))
5568 p4 = p5 + 1;
5569 p5++;
5570 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5571
5572 /* here, we have the cookie name between p1 and p2,
5573 * and its value between p3 and p4.
5574 * we can process it :
5575 *
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5576 * Cookie: NAME=VALUE ;
5577 * | || || |+-> p5
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5578 * | || || +--> p4
5579 * | || |+-------> p3
5580 * | || +--------> p2
5581 * | |+------------> p1
5582 * | +-------------> colon
5583 * +--------------------> cur_ptr
5584 */
5585
5586 if (*p1 == '$') {
5587 /* skip this one */
5588 }
5589 else {
5590 /* first, let's see if we want to capture it */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5591 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5592 txn->cli_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5593 (p4 - p1 >= t->fe->capture_namelen) &&
5594 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5595 int log_len = p4 - p1;
5596
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]5597 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5598 Alert("HTTP logging : out of memory.\n");
5599 } else {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5600 if (log_len > t->fe->capture_len)
5601 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5602 memcpy(txn->cli_cookie, p1, log_len);
5603 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5604 }
5605 }
5606
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5607 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
5608 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5609 /* Cool... it's the right one */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5610 struct server *srv = t->be->srv;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5611 char *delim;
5612
5613 /* if we're in cookie prefix mode, we'll search the delimitor so that we
5614 * have the server ID betweek p3 and delim, and the original cookie between
5615 * delim+1 and p4. Otherwise, delim==p4 :
5616 *
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5617 * Cookie: NAME=SRV~VALUE ;
5618 * | || || | |+-> p5
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5619 * | || || | +--> p4
5620 * | || || +--------> delim
5621 * | || |+-----------> p3
5622 * | || +------------> p2
5623 * | |+----------------> p1
5624 * | +-----------------> colon
5625 * +------------------------> cur_ptr
5626 */
5627
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5628 if (t->be->options & PR_O_COOK_PFX) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5629 for (delim = p3; delim < p4; delim++)
5630 if (*delim == COOKIE_DELIM)
5631 break;
5632 }
5633 else
5634 delim = p4;
5635
5636
5637 /* Here, we'll look for the first running server which supports the cookie.
5638 * This allows to share a same cookie between several servers, for example
5639 * to dedicate backup servers to specific servers only.
5640 * However, to prevent clients from sticking to cookie-less backup server
5641 * when they have incidentely learned an empty cookie, we simply ignore
5642 * empty cookies and mark them as invalid.
5643 */
5644 if (delim == p3)
5645 srv = NULL;
5646
5647 while (srv) {
Willy Tarreau92f2ab12007-02-02 22:14:47 +0100[diff] [blame]5648 if (srv->cookie && (srv->cklen == delim - p3) &&
5649 !memcmp(p3, srv->cookie, delim - p3)) {
Willy Tarreau4de91492010-01-22 19:10:05 +0100[diff] [blame]5650 if ((srv->state & SRV_RUNNING) ||
5651 (t->be->options & PR_O_PERSIST) ||
5652 (t->flags & SN_FORCE_PRST)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5653 /* we found the server and it's usable */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5654 txn->flags &= ~TX_CK_MASK;
Willy Tarreau2a6d88d2010-01-24 13:10:43 +0100[diff] [blame]5655 txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5656 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5657 t->srv = srv;
5658 break;
5659 } else {
5660 /* we found a server, but it's down */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5661 txn->flags &= ~TX_CK_MASK;
5662 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5663 }
5664 }
5665 srv = srv->next;
5666 }
5667
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5668 if (!srv && !(txn->flags & TX_CK_DOWN)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5669 /* no server matched this cookie */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5670 txn->flags &= ~TX_CK_MASK;
5671 txn->flags |= TX_CK_INVALID;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5672 }
5673
5674 /* depending on the cookie mode, we may have to either :
5675 * - delete the complete cookie if we're in insert+indirect mode, so that
5676 * the server never sees it ;
5677 * - remove the server id from the cookie value, and tag the cookie as an
5678 * application cookie so that it does not get accidentely removed later,
5679 * if we're in cookie prefix mode
5680 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5681 if ((t->be->options & PR_O_COOK_PFX) && (delim != p4)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5682 int delta; /* negative */
5683
5684 delta = buffer_replace2(req, p3, delim + 1, NULL, 0);
5685 p4 += delta;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5686 p5 += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5687 cur_end += delta;
5688 cur_next += delta;
5689 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5690 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5691
5692 del_cookie = del_colon = NULL;
5693 app_cookies++; /* protect the header from deletion */
5694 }
5695 else if (del_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5696 (t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5697 del_cookie = p1;
5698 del_colon = colon;
5699 }
5700 } else {
5701 /* now we know that we must keep this cookie since it's
5702 * not ours. But if we wanted to delete our cookie
5703 * earlier, we cannot remove the complete header, but we
5704 * can remove the previous block itself.
5705 */
5706 app_cookies++;
5707
5708 if (del_cookie != NULL) {
5709 int delta; /* negative */
5710
5711 delta = buffer_replace2(req, del_cookie, p1, NULL, 0);
5712 p4 += delta;
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5713 p5 += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5714 cur_end += delta;
5715 cur_next += delta;
5716 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5717 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5718 del_cookie = del_colon = NULL;
5719 }
5720 }
5721
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5722 if (t->be->appsession_name != NULL) {
5723 int cmp_len, value_len;
5724 char *value_begin;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]5725
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5726 if (t->be->options2 & PR_O2_AS_PFX) {
5727 cmp_len = MIN(p4 - p1, t->be->appsession_name_len);
5728 value_begin = p1 + t->be->appsession_name_len;
5729 value_len = p4 - p1 - t->be->appsession_name_len;
5730 } else {
5731 cmp_len = p2 - p1;
5732 value_begin = p3;
5733 value_len = p4 - p3;
5734 }
5735
5736 /* let's see if the cookie is our appcookie */
5737 if (memcmp(p1, t->be->appsession_name, cmp_len) == 0) {
5738 /* Cool... it's the right one */
5739 manage_client_side_appsession(t, value_begin, value_len);
5740 }
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]5741#if defined(DEBUG_HASH)
5742 Alert("manage_client_side_cookies\n");
5743 appsession_hash_dump(&(t->be->htbl_proxy));
5744#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5745 }/* end if ((t->proxy->appsession_name != NULL) ... */
5746 }
5747
5748 /* we'll have to look for another cookie ... */
Willy Tarreau305ae852010-01-03 19:45:54 +0100[diff] [blame]5749 p1 = p5;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5750 } /* while (p1 < cur_end) */
5751
5752 /* There's no more cookie on this line.
5753 * We may have marked the last one(s) for deletion.
5754 * We must do this now in two ways :
5755 * - if there is no app cookie, we simply delete the header ;
5756 * - if there are app cookies, we must delete the end of the
5757 * string properly, including the colon/semi-colon before
5758 * the cookie name.
5759 */
5760 if (del_cookie != NULL) {
5761 int delta;
5762 if (app_cookies) {
5763 delta = buffer_replace2(req, del_colon, cur_end, NULL, 0);
5764 cur_end = del_colon;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5765 cur_hdr->len += delta;
5766 } else {
5767 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5768
5769 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5770 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5771 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5772 cur_hdr->len = 0;
5773 }
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]5774 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5775 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5776 }
5777
5778 /* keep the link from this header to next one */
5779 old_idx = cur_idx;
5780 } /* end of cookie processing on this header */
5781}
5782
5783
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5784/* Iterate the same filter through all response headers contained in <rtr>.
5785 * Returns 1 if this filter can be stopped upon return, otherwise 0.
5786 */
5787int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
5788{
5789 char term;
5790 char *cur_ptr, *cur_end, *cur_next;
5791 int cur_idx, old_idx, last_hdr;
5792 struct http_txn *txn = &t->txn;
5793 struct hdr_idx_elem *cur_hdr;
5794 int len, delta;
5795
5796 last_hdr = 0;
5797
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5798 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5799 old_idx = 0;
5800
5801 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5802 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5803 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5804 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5805 (exp->action == ACT_ALLOW ||
5806 exp->action == ACT_DENY))
5807 return 0;
5808
5809 cur_idx = txn->hdr_idx.v[old_idx].next;
5810 if (!cur_idx)
5811 break;
5812
5813 cur_hdr = &txn->hdr_idx.v[cur_idx];
5814 cur_ptr = cur_next;
5815 cur_end = cur_ptr + cur_hdr->len;
5816 cur_next = cur_end + cur_hdr->cr + 1;
5817
5818 /* Now we have one header between cur_ptr and cur_end,
5819 * and the next header starts at cur_next.
5820 */
5821
5822 /* The annoying part is that pattern matching needs
5823 * that we modify the contents to null-terminate all
5824 * strings before testing them.
5825 */
5826
5827 term = *cur_end;
5828 *cur_end = '\0';
5829
5830 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5831 switch (exp->action) {
5832 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5833 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5834 last_hdr = 1;
5835 break;
5836
5837 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5838 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5839 last_hdr = 1;
5840 break;
5841
5842 case ACT_REPLACE:
5843 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5844 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
5845 /* FIXME: if the user adds a newline in the replacement, the
5846 * index will not be recalculated for now, and the new line
5847 * will not be counted as a new header.
5848 */
5849
5850 cur_end += delta;
5851 cur_next += delta;
5852 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5853 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5854 break;
5855
5856 case ACT_REMOVE:
5857 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
5858 cur_next += delta;
5859
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5860 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5861 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5862 txn->hdr_idx.used--;
5863 cur_hdr->len = 0;
5864 cur_end = NULL; /* null-term has been rewritten */
5865 break;
5866
5867 }
5868 }
5869 if (cur_end)
5870 *cur_end = term; /* restore the string terminator */
5871
5872 /* keep the link from this header to next one in case of later
5873 * removal of next header.
5874 */
5875 old_idx = cur_idx;
5876 }
5877 return 0;
5878}
5879
5880
5881/* Apply the filter to the status line in the response buffer <rtr>.
5882 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5883 * or -1 if a replacement resulted in an invalid status line.
5884 */
5885int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
5886{
5887 char term;
5888 char *cur_ptr, *cur_end;
5889 int done;
5890 struct http_txn *txn = &t->txn;
5891 int len, delta;
5892
5893
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5894 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5895 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5896 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5897 (exp->action == ACT_ALLOW ||
5898 exp->action == ACT_DENY))
5899 return 0;
5900 else if (exp->action == ACT_REMOVE)
5901 return 0;
5902
5903 done = 0;
5904
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5905 cur_ptr = txn->rsp.sol;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5906 cur_end = cur_ptr + txn->rsp.sl.rq.l;
5907
5908 /* Now we have the status line between cur_ptr and cur_end */
5909
5910 /* The annoying part is that pattern matching needs
5911 * that we modify the contents to null-terminate all
5912 * strings before testing them.
5913 */
5914
5915 term = *cur_end;
5916 *cur_end = '\0';
5917
5918 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5919 switch (exp->action) {
5920 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5921 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5922 done = 1;
5923 break;
5924
5925 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5926 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5927 done = 1;
5928 break;
5929
5930 case ACT_REPLACE:
5931 *cur_end = term; /* restore the string terminator */
5932 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5933 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
5934 /* FIXME: if the user adds a newline in the replacement, the
5935 * index will not be recalculated for now, and the new line
5936 * will not be counted as a new header.
5937 */
5938
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5939 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5940 cur_end += delta;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5941 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]5942 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5943 cur_ptr, cur_end + 1,
5944 NULL, NULL);
5945 if (unlikely(!cur_end))
5946 return -1;
5947
5948 /* we have a full respnse and we know that we have either a CR
5949 * or an LF at <ptr>.
5950 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]5951 txn->status = strl2ui(txn->rsp.sol + txn->rsp.sl.st.c, txn->rsp.sl.st.c_l);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5952 hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.rq.l, *cur_end == '\r');
5953 /* there is no point trying this regex on headers */
5954 return 1;
5955 }
5956 }
5957 *cur_end = term; /* restore the string terminator */
5958 return done;
5959}
5960
5961
5962
5963/*
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5964 * 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]5965 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
5966 * unparsable response.
5967 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5968int apply_filters_to_response(struct session *s, struct buffer *rtr, struct proxy *px)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5969{
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5970 struct http_txn *txn = &s->txn;
5971 struct hdr_exp *exp;
5972
5973 for (exp = px->rsp_exp; exp; exp = exp->next) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5974 int ret;
5975
5976 /*
5977 * The interleaving of transformations and verdicts
5978 * makes it difficult to decide to continue or stop
5979 * the evaluation.
5980 */
5981
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5982 if (txn->flags & TX_SVDENY)
5983 break;
5984
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5985 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5986 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
5987 exp->action == ACT_PASS)) {
5988 exp = exp->next;
5989 continue;
5990 }
5991
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]5992 /* if this filter had a condition, evaluate it now and skip to
5993 * next filter if the condition does not match.
5994 */
5995 if (exp->cond) {
5996 ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_RTR);
5997 ret = acl_pass(ret);
5998 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
5999 ret = !ret;
6000 if (!ret)
6001 continue;
6002 }
6003
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6004 /* Apply the filter to the status line. */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6005 ret = apply_filter_to_sts_line(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6006 if (unlikely(ret < 0))
6007 return -1;
6008
6009 if (likely(ret == 0)) {
6010 /* The filter did not match the response, it can be
6011 * iterated through all headers.
6012 */
Willy Tarreaufdb563c2010-01-31 15:43:27 +0100[diff] [blame]6013 apply_filter_to_resp_headers(s, rtr, exp);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6014 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6015 }
6016 return 0;
6017}
6018
6019
6020
6021/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]6022 * Manage server-side cookies. It can impact performance by about 2% so it is
6023 * desirable to call it only when needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6024 */
6025void manage_server_side_cookies(struct session *t, struct buffer *rtr)
6026{
6027 struct http_txn *txn = &t->txn;
6028 char *p1, *p2, *p3, *p4;
6029
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6030 char *cur_ptr, *cur_end, *cur_next;
6031 int cur_idx, old_idx, delta;
6032
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6033 /* Iterate through the headers.
6034 * we start with the start line.
6035 */
6036 old_idx = 0;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6037 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6038
6039 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
6040 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6041 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6042
6043 cur_hdr = &txn->hdr_idx.v[cur_idx];
6044 cur_ptr = cur_next;
6045 cur_end = cur_ptr + cur_hdr->len;
6046 cur_next = cur_end + cur_hdr->cr + 1;
6047
6048 /* We have one full header between cur_ptr and cur_end, and the
6049 * next header starts at cur_next. We're only interested in
6050 * "Cookie:" headers.
6051 */
6052
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6053 val = http_header_match2(cur_ptr, cur_end, "Set-Cookie", 10);
6054 if (!val) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6055 old_idx = cur_idx;
6056 continue;
6057 }
6058
6059 /* OK, right now we know we have a set-cookie at cur_ptr */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6060 txn->flags |= TX_SCK_ANY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6061
6062
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6063 /* maybe we only wanted to see if there was a set-cookie. Note that
6064 * the cookie capture is declared in the fronend.
6065 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6066 if (t->be->cookie_name == NULL &&
6067 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6068 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6069 return;
6070
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6071 p1 = cur_ptr + val; /* first non-space char after 'Set-Cookie:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6072
6073 while (p1 < cur_end) { /* in fact, we'll break after the first cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6074 if (p1 == cur_end || *p1 == ';') /* end of cookie */
6075 break;
6076
6077 /* p1 is at the beginning of the cookie name */
6078 p2 = p1;
6079
6080 while (p2 < cur_end && *p2 != '=' && *p2 != ';')
6081 p2++;
6082
6083 if (p2 == cur_end || *p2 == ';') /* next cookie */
6084 break;
6085
6086 p3 = p2 + 1; /* skip the '=' sign */
6087 if (p3 == cur_end)
6088 break;
6089
6090 p4 = p3;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]6091 while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';')
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6092 p4++;
6093
6094 /* here, we have the cookie name between p1 and p2,
6095 * and its value between p3 and p4.
6096 * we can process it.
6097 */
6098
6099 /* first, let's see if we want to capture it */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6100 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6101 txn->srv_cookie == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6102 (p4 - p1 >= t->fe->capture_namelen) &&
6103 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6104 int log_len = p4 - p1;
6105
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]6106 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6107 Alert("HTTP logging : out of memory.\n");
6108 }
6109
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]6110 if (log_len > t->fe->capture_len)
6111 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]6112 memcpy(txn->srv_cookie, p1, log_len);
6113 txn->srv_cookie[log_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6114 }
6115
6116 /* now check if we need to process it for persistence */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6117 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
6118 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6119 /* Cool... it's the right one */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6120 txn->flags |= TX_SCK_SEEN;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6121
6122 /* If the cookie is in insert mode on a known server, we'll delete
6123 * this occurrence because we'll insert another one later.
6124 * We'll delete it too if the "indirect" option is set and we're in
6125 * a direct access. */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6126 if (((t->srv) && (t->be->options & PR_O_COOK_INS)) ||
6127 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6128 /* this header must be deleted */
6129 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
6130 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
6131 txn->hdr_idx.used--;
6132 cur_hdr->len = 0;
6133 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6134 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6135
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6136 txn->flags |= TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6137 }
6138 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6139 (t->be->options & PR_O_COOK_RW)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6140 /* replace bytes p3->p4 with the cookie name associated
6141 * with this server since we know it.
6142 */
6143 delta = buffer_replace2(rtr, p3, p4, t->srv->cookie, t->srv->cklen);
6144 cur_hdr->len += delta;
6145 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6146 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6147
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6148 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6149 }
6150 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6151 (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6152 /* insert the cookie name associated with this server
6153 * before existing cookie, and insert a delimitor between them..
6154 */
6155 delta = buffer_replace2(rtr, p3, p3, t->srv->cookie, t->srv->cklen + 1);
6156 cur_hdr->len += delta;
6157 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]6158 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6159
6160 p3[t->srv->cklen] = COOKIE_DELIM;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6161 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6162 }
6163 }
6164 /* next, let's see if the cookie is our appcookie */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6165 else if (t->be->appsession_name != NULL) {
6166 int cmp_len, value_len;
6167 char *value_begin;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6168
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6169 if (t->be->options2 & PR_O2_AS_PFX) {
6170 cmp_len = MIN(p4 - p1, t->be->appsession_name_len);
6171 value_begin = p1 + t->be->appsession_name_len;
6172 value_len = MIN(t->be->appsession_len, p4 - p1 - t->be->appsession_name_len);
6173 } else {
6174 cmp_len = p2 - p1;
6175 value_begin = p3;
6176 value_len = MIN(t->be->appsession_len, p4 - p3);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6177 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6178
6179 if (memcmp(p1, t->be->appsession_name, cmp_len) == 0) {
6180 /* Cool... it's the right one */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6181 if (txn->sessid != NULL) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6182 /* free previously allocated memory as we don't need it anymore */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6183 pool_free2(apools.sessid, txn->sessid);
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6184 }
6185 /* Store the sessid in the session for future use */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6186 if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) {
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6187 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6188 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
6189 return;
6190 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6191 memcpy(txn->sessid, value_begin, value_len);
6192 txn->sessid[value_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6193 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6194 } /* end if ((t->be->appsession_name != NULL) ... */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6195 break; /* we don't want to loop again since there cannot be another cookie on the same line */
6196 } /* we're now at the end of the cookie value */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6197 /* keep the link from this header to next one */
6198 old_idx = cur_idx;
6199 } /* end of cookie processing on this header */
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6200
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6201 if (txn->sessid != NULL) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6202 appsess *asession = NULL;
6203 /* only do insert, if lookup fails */
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6204 asession = appsession_hash_lookup(&(t->be->htbl_proxy), txn->sessid);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6205 if (asession == NULL) {
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]6206 size_t server_id_len;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6207 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
6208 Alert("Not enough Memory process_srv():asession:calloc().\n");
6209 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
6210 return;
6211 }
6212 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
6213 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6214 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]6215 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6216 return;
6217 }
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6218 memcpy(asession->sessid, txn->sessid, t->be->appsession_len);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6219 asession->sessid[t->be->appsession_len] = 0;
6220
Willy Tarreau1fac7532010-01-09 19:23:06 +0100[diff] [blame]6221 server_id_len = strlen(t->srv->id) + 1;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6222 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
6223 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
6224 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]6225 t->be->htbl_proxy.destroy(asession);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]6226 return;
6227 }
6228 asession->serverid[0] = '\0';
6229 memcpy(asession->serverid, t->srv->id, server_id_len);
6230
6231 asession->request_count = 0;
6232 appsession_hash_insert(&(t->be->htbl_proxy), asession);
6233 }
6234
6235 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
6236 asession->request_count++;
6237 }
6238
6239#if defined(DEBUG_HASH)
6240 Alert("manage_server_side_cookies\n");
6241 appsession_hash_dump(&(t->be->htbl_proxy));
6242#endif
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6243}
6244
6245
6246
6247/*
6248 * Check if response is cacheable or not. Updates t->flags.
6249 */
6250void check_response_for_cacheability(struct session *t, struct buffer *rtr)
6251{
6252 struct http_txn *txn = &t->txn;
6253 char *p1, *p2;
6254
6255 char *cur_ptr, *cur_end, *cur_next;
6256 int cur_idx;
6257
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]6258 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6259 return;
6260
6261 /* Iterate through the headers.
6262 * we start with the start line.
6263 */
6264 cur_idx = 0;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6265 cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6266
6267 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
6268 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6269 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6270
6271 cur_hdr = &txn->hdr_idx.v[cur_idx];
6272 cur_ptr = cur_next;
6273 cur_end = cur_ptr + cur_hdr->len;
6274 cur_next = cur_end + cur_hdr->cr + 1;
6275
6276 /* We have one full header between cur_ptr and cur_end, and the
6277 * next header starts at cur_next. We're only interested in
6278 * "Cookie:" headers.
6279 */
6280
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6281 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
6282 if (val) {
6283 if ((cur_end - (cur_ptr + val) >= 8) &&
6284 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
6285 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
6286 return;
6287 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6288 }
6289
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6290 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
6291 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6292 continue;
6293
6294 /* OK, right now we know we have a cache-control header at cur_ptr */
6295
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]6296 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6297
6298 if (p1 >= cur_end) /* no more info */
6299 continue;
6300
6301 /* p1 is at the beginning of the value */
6302 p2 = p1;
6303
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]6304 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6305 p2++;
6306
6307 /* we have a complete value between p1 and p2 */
6308 if (p2 < cur_end && *p2 == '=') {
6309 /* we have something of the form no-cache="set-cookie" */
6310 if ((cur_end - p1 >= 21) &&
6311 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
6312 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6313 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6314 continue;
6315 }
6316
6317 /* OK, so we know that either p2 points to the end of string or to a comma */
6318 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
6319 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
6320 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
6321 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6322 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6323 return;
6324 }
6325
6326 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]6327 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]6328 continue;
6329 }
6330 }
6331}
6332
6333
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6334/*
6335 * Try to retrieve a known appsession in the URI, then the associated server.
6336 * If the server is found, it's assigned to the session.
6337 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6338void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6339{
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6340 char *end_params, *first_param, *cur_param, *next_param;
6341 char separator;
6342 int value_len;
6343
6344 int mode = t->be->options2 & PR_O2_AS_M_ANY;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6345
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]6346 if (t->be->appsession_name == NULL ||
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6347 (t->txn.meth != HTTP_METH_GET && t->txn.meth != HTTP_METH_POST)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6348 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6349 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6350
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6351 first_param = NULL;
6352 switch (mode) {
6353 case PR_O2_AS_M_PP:
6354 first_param = memchr(begin, ';', len);
6355 break;
6356 case PR_O2_AS_M_QS:
6357 first_param = memchr(begin, '?', len);
6358 break;
6359 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6360
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6361 if (first_param == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6362 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6363 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6364
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6365 switch (mode) {
6366 case PR_O2_AS_M_PP:
6367 if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) {
6368 end_params = (char *) begin + len;
6369 }
6370 separator = ';';
6371 break;
6372 case PR_O2_AS_M_QS:
6373 end_params = (char *) begin + len;
6374 separator = '&';
6375 break;
6376 default:
6377 /* unknown mode, shouldn't happen */
6378 return;
6379 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6380
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]6381 cur_param = next_param = end_params;
6382 while (cur_param > first_param) {
6383 cur_param--;
6384 if ((cur_param[0] == separator) || (cur_param == first_param)) {
6385 /* let's see if this is the appsession parameter */
6386 if ((cur_param + t->be->appsession_name_len + 1 < next_param) &&
6387 ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') &&
6388 (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
6389 /* Cool... it's the right one */
6390 cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2);
6391 value_len = MIN(t->be->appsession_len, next_param - cur_param);
6392 if (value_len > 0) {
6393 manage_client_side_appsession(t, cur_param, value_len);
6394 }
6395 break;
6396 }
6397 next_param = cur_param;
6398 }
6399 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6400#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]6401 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]6402 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6403#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6404}
6405
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6406/*
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]6407 * 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]6408 * for the current backend.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6409 *
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]6410 * 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]6411 * t->be->uri_auth field is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6412 *
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6413 * Returns 1 if stats should be provided, otherwise 0.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6414 */
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6415int stats_check_uri(struct session *t, struct proxy *backend)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6416{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6417 struct http_txn *txn = &t->txn;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6418 struct uri_auth *uri_auth = backend->uri_auth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6419 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6420
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]6421 if (!uri_auth)
6422 return 0;
6423
6424 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD)
6425 return 0;
6426
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6427 memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats));
6428
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6429 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]6430 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6431 return 0;
6432
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6433 h = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]6434
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]6435 /* the URI is in h */
6436 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6437 return 0;
6438
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]6439 h += uri_auth->uri_len;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6440 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]6441 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6442 t->data_ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]6443 break;
6444 }
6445 h++;
6446 }
6447
6448 if (uri_auth->refresh) {
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6449 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
6450 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]6451 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6452 t->data_ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]6453 break;
6454 }
6455 h++;
6456 }
6457 }
6458
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6459 h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len;
6460 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]6461 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6462 t->data_ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]6463 break;
6464 }
6465 h++;
6466 }
6467
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]6468 t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
6469
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6470 return 1;
6471}
6472
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6473/*
6474 * Capture a bad request or response and archive it in the proxy's structure.
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6475 * WARNING: it's unlikely that we've reached HTTP_MSG_BODY here so we must not
6476 * assume that msg->sol = buf->data + msg->som.
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6477 */
6478void http_capture_bad_message(struct error_snapshot *es, struct session *s,
6479 struct buffer *buf, struct http_msg *msg,
6480 struct proxy *other_end)
6481{
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]6482 es->len = buf->r - (buf->data + msg->som);
6483 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6484 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]6485 es->pos = msg->err_pos - msg->som;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6486 else
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]6487 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]6488 es->when = date; // user-visible date
6489 es->sid = s->uniq_id;
6490 es->srv = s->srv;
6491 es->oe = other_end;
6492 es->src = s->cli_addr;
6493}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]6494
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]6495/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6496 * Print a debug line with a header
6497 */
6498void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
6499{
6500 int len, max;
6501 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]6502 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6503 max = end - start;
6504 UBOUND(max, sizeof(trash) - len - 1);
6505 len += strlcpy2(trash + len, start, max + 1);
6506 trash[len++] = '\n';
6507 write(1, trash, len);
6508}
6509
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6510/*
6511 * Initialize a new HTTP transaction for session <s>. It is assumed that all
6512 * the required fields are properly allocated and that we only need to (re)init
6513 * them. This should be used before processing any new request.
6514 */
6515void http_init_txn(struct session *s)
6516{
6517 struct http_txn *txn = &s->txn;
6518 struct proxy *fe = s->fe;
6519
6520 txn->flags = 0;
6521 txn->status = -1;
6522
6523 txn->req.sol = txn->req.eol = NULL;
6524 txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
6525 txn->rsp.sol = txn->rsp.eol = NULL;
6526 txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */
6527 txn->req.hdr_content_len = 0LL;
6528 txn->rsp.hdr_content_len = 0LL;
6529 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
6530 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]6531
6532 txn->auth.method = HTTP_AUTH_UNKNOWN;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6533
6534 txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
6535 if (fe->options2 & PR_O2_REQBUG_OK)
6536 txn->req.err_pos = -1; /* let buggy requests pass */
6537
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]6538 if (txn->req.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6539 memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *));
6540
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]6541 if (txn->rsp.cap)
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6542 memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *));
6543
6544 if (txn->hdr_idx.v)
6545 hdr_idx_init(&txn->hdr_idx);
6546}
6547
6548/* to be used at the end of a transaction */
6549void http_end_txn(struct session *s)
6550{
6551 struct http_txn *txn = &s->txn;
6552
6553 /* these ones will have been dynamically allocated */
6554 pool_free2(pool2_requri, txn->uri);
6555 pool_free2(pool2_capture, txn->cli_cookie);
6556 pool_free2(pool2_capture, txn->srv_cookie);
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6557 pool_free2(apools.sessid, txn->sessid);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]6558
Willy Tarreaua3377ee2010-01-10 10:49:11 +0100[diff] [blame]6559 txn->sessid = NULL;
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6560 txn->uri = NULL;
6561 txn->srv_cookie = NULL;
6562 txn->cli_cookie = NULL;
Willy Tarreau46023632010-01-07 22:51:47 +0100[diff] [blame]6563
6564 if (txn->req.cap) {
6565 struct cap_hdr *h;
6566 for (h = s->fe->req_cap; h; h = h->next)
6567 pool_free2(h->pool, txn->req.cap[h->index]);
6568 memset(txn->req.cap, 0, s->fe->nb_req_cap * sizeof(void *));
6569 }
6570
6571 if (txn->rsp.cap) {
6572 struct cap_hdr *h;
6573 for (h = s->fe->rsp_cap; h; h = h->next)
6574 pool_free2(h->pool, txn->rsp.cap[h->index]);
6575 memset(txn->rsp.cap, 0, s->fe->nb_rsp_cap * sizeof(void *));
6576 }
6577
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6578}
6579
6580/* to be used at the end of a transaction to prepare a new one */
6581void http_reset_txn(struct session *s)
6582{
6583 http_end_txn(s);
6584 http_init_txn(s);
6585
6586 s->be = s->fe;
6587 s->req->analysers = s->listener->analysers;
6588 s->logs.logwait = s->fe->to_log;
6589 s->srv = s->prev_srv = s->srv_conn = NULL;
Emeric Brunb982a3d2010-01-04 15:45:53 +0100[diff] [blame]6590 /* re-init store persistence */
6591 s->store_count = 0;
6592
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6593 s->pend_pos = NULL;
6594 s->conn_retries = s->be->conn_retries;
6595
6596 s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
6597
Willy Tarreau739cfba2010-01-25 23:11:14 +0100[diff] [blame]6598 /* We must trim any excess data from the response buffer, because we
6599 * may have blocked an invalid response from a server that we don't
6600 * want to accidentely forward once we disable the analysers, nor do
6601 * we want those data to come along with next response. A typical
6602 * example of such data would be from a buggy server responding to
6603 * a HEAD with some data, or sending more than the advertised
6604 * content-length.
6605 */
6606 if (unlikely(s->rep->l > s->rep->send_max)) {
6607 s->rep->l = s->rep->send_max;
6608 s->rep->r = s->rep->w + s->rep->l;
6609 if (s->rep->r >= s->rep->data + s->rep->size)
6610 s->rep->r -= s->rep->size;
6611 }
6612
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]6613 s->req->rto = s->fe->timeout.client;
6614 s->req->wto = s->be->timeout.server;
6615 s->req->cto = s->be->timeout.connect;
6616
6617 s->rep->rto = s->be->timeout.server;
6618 s->rep->wto = s->fe->timeout.client;
6619 s->rep->cto = TICK_ETERNITY;
6620
6621 s->req->rex = TICK_ETERNITY;
6622 s->req->wex = TICK_ETERNITY;
6623 s->req->analyse_exp = TICK_ETERNITY;
6624 s->rep->rex = TICK_ETERNITY;
6625 s->rep->wex = TICK_ETERNITY;
6626 s->rep->analyse_exp = TICK_ETERNITY;
6627}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6628
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6629/************************************************************************/
6630/* The code below is dedicated to ACL parsing and matching */
6631/************************************************************************/
6632
6633
6634
6635
6636/* 1. Check on METHOD
6637 * We use the pre-parsed method if it is known, and store its number as an
6638 * integer. If it is unknown, we use the pointer and the length.
6639 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6640static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6641{
6642 int len, meth;
6643
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6644 len = strlen(*text);
6645 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6646
6647 pattern->val.i = meth;
6648 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6649 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6650 if (!pattern->ptr.str)
6651 return 0;
6652 pattern->len = len;
6653 }
6654 return 1;
6655}
6656
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6657static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6658acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
6659 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6660{
6661 int meth;
6662 struct http_txn *txn = l7;
6663
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6664 if (!txn)
6665 return 0;
6666
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6667 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6668 return 0;
6669
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6670 meth = txn->meth;
6671 test->i = meth;
6672 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6673 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6674 /* ensure the indexes are not affected */
6675 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6676 test->len = txn->req.sl.rq.m_l;
6677 test->ptr = txn->req.sol;
6678 }
6679 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
6680 return 1;
6681}
6682
6683static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
6684{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]6685 int icase;
6686
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6687 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6688 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6689
6690 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6691 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6692
6693 /* Other method, we must compare the strings */
6694 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6695 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]6696
6697 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
6698 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
6699 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6700 return ACL_PAT_FAIL;
6701 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6702}
6703
6704/* 2. Check on Request/Status Version
6705 * We simply compare strings here.
6706 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6707static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6708{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6709 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6710 if (!pattern->ptr.str)
6711 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6712 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6713 return 1;
6714}
6715
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6716static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6717acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
6718 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6719{
6720 struct http_txn *txn = l7;
6721 char *ptr;
6722 int len;
6723
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6724 if (!txn)
6725 return 0;
6726
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6727 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6728 return 0;
6729
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6730 len = txn->req.sl.rq.v_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6731 ptr = txn->req.sol + txn->req.sl.rq.v;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6732
6733 while ((len-- > 0) && (*ptr++ != '/'));
6734 if (len <= 0)
6735 return 0;
6736
6737 test->ptr = ptr;
6738 test->len = len;
6739
6740 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
6741 return 1;
6742}
6743
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6744static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6745acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
6746 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6747{
6748 struct http_txn *txn = l7;
6749 char *ptr;
6750 int len;
6751
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6752 if (!txn)
6753 return 0;
6754
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6755 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6756 return 0;
6757
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6758 len = txn->rsp.sl.st.v_l;
6759 ptr = txn->rsp.sol;
6760
6761 while ((len-- > 0) && (*ptr++ != '/'));
6762 if (len <= 0)
6763 return 0;
6764
6765 test->ptr = ptr;
6766 test->len = len;
6767
6768 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
6769 return 1;
6770}
6771
6772/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6773static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6774acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
6775 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6776{
6777 struct http_txn *txn = l7;
6778 char *ptr;
6779 int len;
6780
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6781 if (!txn)
6782 return 0;
6783
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6784 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6785 return 0;
6786
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6787 len = txn->rsp.sl.st.c_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6788 ptr = txn->rsp.sol + txn->rsp.sl.st.c;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6789
6790 test->i = __strl2ui(ptr, len);
6791 test->flags = ACL_TEST_F_VOL_1ST;
6792 return 1;
6793}
6794
6795/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6796static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6797acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
6798 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6799{
6800 struct http_txn *txn = l7;
6801
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6802 if (!txn)
6803 return 0;
6804
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6805 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6806 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6807
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6808 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6809 /* ensure the indexes are not affected */
6810 return 0;
6811
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6812 test->len = txn->req.sl.rq.u_l;
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6813 test->ptr = txn->req.sol + txn->req.sl.rq.u;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6814
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]6815 /* we do not need to set READ_ONLY because the data is in a buffer */
6816 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6817 return 1;
6818}
6819
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6820static int
6821acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
6822 struct acl_expr *expr, struct acl_test *test)
6823{
6824 struct http_txn *txn = l7;
6825
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6826 if (!txn)
6827 return 0;
6828
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6829 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6830 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6831
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6832 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6833 /* ensure the indexes are not affected */
6834 return 0;
6835
6836 /* Parse HTTP request */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6837 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]6838 test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr;
6839 test->i = AF_INET;
6840
6841 /*
6842 * If we are parsing url in frontend space, we prepare backend stage
6843 * to not parse again the same url ! optimization lazyness...
6844 */
6845 if (px->options & PR_O_HTTP_PROXY)
6846 l4->flags |= SN_ADDR_SET;
6847
6848 test->flags = ACL_TEST_F_READ_ONLY;
6849 return 1;
6850}
6851
6852static int
6853acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
6854 struct acl_expr *expr, struct acl_test *test)
6855{
6856 struct http_txn *txn = l7;
6857
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6858 if (!txn)
6859 return 0;
6860
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6861 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6862 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6863
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6864 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6865 /* ensure the indexes are not affected */
6866 return 0;
6867
6868 /* Same optimization as url_ip */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]6869 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]6870 test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port);
6871
6872 if (px->options & PR_O_HTTP_PROXY)
6873 l4->flags |= SN_ADDR_SET;
6874
6875 test->flags = ACL_TEST_F_READ_ONLY;
6876 return 1;
6877}
6878
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6879/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
6880 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
6881 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6882static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6883acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6884 struct acl_expr *expr, struct acl_test *test)
6885{
6886 struct http_txn *txn = l7;
6887 struct hdr_idx *idx = &txn->hdr_idx;
6888 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6889
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6890 if (!txn)
6891 return 0;
6892
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6893 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
6894 /* search for header from the beginning */
6895 ctx->idx = 0;
6896
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6897 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
6898 test->flags |= ACL_TEST_F_FETCH_MORE;
6899 test->flags |= ACL_TEST_F_VOL_HDR;
6900 test->len = ctx->vlen;
6901 test->ptr = (char *)ctx->line + ctx->val;
6902 return 1;
6903 }
6904
6905 test->flags &= ~ACL_TEST_F_FETCH_MORE;
6906 test->flags |= ACL_TEST_F_VOL_HDR;
6907 return 0;
6908}
6909
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6910static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6911acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
6912 struct acl_expr *expr, struct acl_test *test)
6913{
6914 struct http_txn *txn = l7;
6915
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6916 if (!txn)
6917 return 0;
6918
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6919 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6920 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6921
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6922 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6923 /* ensure the indexes are not affected */
6924 return 0;
6925
6926 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
6927}
6928
6929static int
6930acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
6931 struct acl_expr *expr, struct acl_test *test)
6932{
6933 struct http_txn *txn = l7;
6934
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6935 if (!txn)
6936 return 0;
6937
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6938 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6939 return 0;
6940
6941 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
6942}
6943
6944/* 6. Check on HTTP header count. The number of occurrences is returned.
6945 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
6946 */
6947static int
6948acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6949 struct acl_expr *expr, struct acl_test *test)
6950{
6951 struct http_txn *txn = l7;
6952 struct hdr_idx *idx = &txn->hdr_idx;
6953 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6954 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6955
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6956 if (!txn)
6957 return 0;
6958
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6959 ctx.idx = 0;
6960 cnt = 0;
6961 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
6962 cnt++;
6963
6964 test->i = cnt;
6965 test->flags = ACL_TEST_F_VOL_HDR;
6966 return 1;
6967}
6968
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6969static int
6970acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
6971 struct acl_expr *expr, struct acl_test *test)
6972{
6973 struct http_txn *txn = l7;
6974
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6975 if (!txn)
6976 return 0;
6977
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6978 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6979 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6980
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6981 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6982 /* ensure the indexes are not affected */
6983 return 0;
6984
6985 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
6986}
6987
6988static int
6989acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
6990 struct acl_expr *expr, struct acl_test *test)
6991{
6992 struct http_txn *txn = l7;
6993
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6994 if (!txn)
6995 return 0;
6996
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6997 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6998 return 0;
6999
7000 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
7001}
7002
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7003/* 7. Check on HTTP header's integer value. The integer value is returned.
7004 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7005 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7006 */
7007static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7008acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7009 struct acl_expr *expr, struct acl_test *test)
7010{
7011 struct http_txn *txn = l7;
7012 struct hdr_idx *idx = &txn->hdr_idx;
7013 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7014
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7015 if (!txn)
7016 return 0;
7017
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7018 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7019 /* search for header from the beginning */
7020 ctx->idx = 0;
7021
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7022 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7023 test->flags |= ACL_TEST_F_FETCH_MORE;
7024 test->flags |= ACL_TEST_F_VOL_HDR;
7025 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
7026 return 1;
7027 }
7028
7029 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7030 test->flags |= ACL_TEST_F_VOL_HDR;
7031 return 0;
7032}
7033
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7034static int
7035acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
7036 struct acl_expr *expr, struct acl_test *test)
7037{
7038 struct http_txn *txn = l7;
7039
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7040 if (!txn)
7041 return 0;
7042
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7043 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7044 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7045
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7046 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7047 /* ensure the indexes are not affected */
7048 return 0;
7049
7050 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
7051}
7052
7053static int
7054acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
7055 struct acl_expr *expr, struct acl_test *test)
7056{
7057 struct http_txn *txn = l7;
7058
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7059 if (!txn)
7060 return 0;
7061
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7062 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7063 return 0;
7064
7065 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
7066}
7067
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7068/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
7069 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
7070 */
7071static int
7072acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
7073 struct acl_expr *expr, struct acl_test *test)
7074{
7075 struct http_txn *txn = l7;
7076 struct hdr_idx *idx = &txn->hdr_idx;
7077 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
7078
7079 if (!txn)
7080 return 0;
7081
7082 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
7083 /* search for header from the beginning */
7084 ctx->idx = 0;
7085
7086 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
7087 test->flags |= ACL_TEST_F_FETCH_MORE;
7088 test->flags |= ACL_TEST_F_VOL_HDR;
7089 /* Same optimization as url_ip */
7090 memset(&l4->srv_addr.sin_addr, 0, sizeof(l4->srv_addr.sin_addr));
7091 url2ip((char *)ctx->line + ctx->val, &l4->srv_addr.sin_addr);
7092 test->ptr = (void *)&l4->srv_addr.sin_addr;
7093 test->i = AF_INET;
7094 return 1;
7095 }
7096
7097 test->flags &= ~ACL_TEST_F_FETCH_MORE;
7098 test->flags |= ACL_TEST_F_VOL_HDR;
7099 return 0;
7100}
7101
7102static int
7103acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7104 struct acl_expr *expr, struct acl_test *test)
7105{
7106 struct http_txn *txn = l7;
7107
7108 if (!txn)
7109 return 0;
7110
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7111 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7112 return 0;
7113
7114 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7115 /* ensure the indexes are not affected */
7116 return 0;
7117
7118 return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
7119}
7120
7121static int
7122acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
7123 struct acl_expr *expr, struct acl_test *test)
7124{
7125 struct http_txn *txn = l7;
7126
7127 if (!txn)
7128 return 0;
7129
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7130 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7131 return 0;
7132
7133 return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
7134}
7135
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7136/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
7137 * the first '/' after the possible hostname, and ends before the possible '?'.
7138 */
7139static int
7140acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
7141 struct acl_expr *expr, struct acl_test *test)
7142{
7143 struct http_txn *txn = l7;
7144 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]7145
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7146 if (!txn)
7147 return 0;
7148
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7149 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7150 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]7151
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7152 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
7153 /* ensure the indexes are not affected */
7154 return 0;
7155
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7156 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]7157 ptr = http_get_path(txn);
7158 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7159 return 0;
7160
7161 /* OK, we got the '/' ! */
7162 test->ptr = ptr;
7163
7164 while (ptr < end && *ptr != '?')
7165 ptr++;
7166
7167 test->len = ptr - test->ptr;
7168
7169 /* we do not need to set READ_ONLY because the data is in a buffer */
7170 test->flags = ACL_TEST_F_VOL_1ST;
7171 return 1;
7172}
7173
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7174static int
7175acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
7176 struct acl_expr *expr, struct acl_test *test)
7177{
7178 struct buffer *req = s->req;
7179 struct http_txn *txn = &s->txn;
7180 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7181
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7182 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
7183 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
7184 */
7185
7186 if (!s || !req)
7187 return 0;
7188
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7189 if (unlikely(msg->msg_state >= HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7190 /* Already decoded as OK */
7191 test->flags |= ACL_TEST_F_SET_RES_PASS;
7192 return 1;
7193 }
7194
7195 /* Try to decode HTTP request */
7196 if (likely(req->lr < req->r))
7197 http_msg_analyzer(req, msg, &txn->hdr_idx);
7198
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]7199 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7200 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
7201 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7202 return 1;
7203 }
7204 /* wait for final state */
7205 test->flags |= ACL_TEST_F_MAY_CHANGE;
7206 return 0;
7207 }
7208
7209 /* OK we got a valid HTTP request. We have some minor preparation to
7210 * perform so that further checks can rely on HTTP tests.
7211 */
Willy Tarreau962c3f42010-01-10 00:15:35 +0100[diff] [blame]7212 txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7213 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
7214 s->flags |= SN_REDIRECTABLE;
7215
7216 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
7217 test->flags |= ACL_TEST_F_SET_RES_FAIL;
7218 return 1;
7219 }
7220
7221 test->flags |= ACL_TEST_F_SET_RES_PASS;
7222 return 1;
7223}
7224
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7225static int
7226acl_fetch_http_auth(struct proxy *px, struct session *s, void *l7, int dir,
7227 struct acl_expr *expr, struct acl_test *test)
7228{
7229
7230 if (!s)
7231 return 0;
7232
7233 if (!get_http_auth(s))
7234 return 0;
7235
7236 test->ctx.a[0] = expr->arg.ul;
7237 test->ctx.a[1] = s->txn.auth.user;
7238 test->ctx.a[2] = s->txn.auth.pass;
7239
7240 test->flags |= ACL_TEST_F_READ_ONLY | ACL_TEST_F_NULL_MATCH;
7241
7242 return 1;
7243}
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7244
7245/************************************************************************/
7246/* All supported keywords must be declared here. */
7247/************************************************************************/
7248
7249/* Note: must not be declared <const> as its list will be overwritten */
7250static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]7251 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
7252
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]7253 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
7254 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE },
7255 { "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE },
7256 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7257
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]7258 { "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE },
7259 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
7260 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
7261 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
7262 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
7263 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
7264 { "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
7265 { "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE },
7266 { "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]7267
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]7268 /* note: we should set hdr* to use ACL_USE_HDR_VOLATILE, and chdr* to use L7REQ_VOLATILE */
7269 { "hdr", acl_parse_str, acl_fetch_chdr, acl_match_str, ACL_USE_L7REQ_VOLATILE },
7270 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
7271 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
7272 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
7273 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
7274 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
7275 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
7276 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
7277 { "hdr_val", acl_parse_int, acl_fetch_chdr_val,acl_match_int, ACL_USE_L7REQ_VOLATILE },
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7278 { "hdr_ip", acl_parse_ip, acl_fetch_chdr_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE },
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]7279
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]7280 { "shdr", acl_parse_str, acl_fetch_shdr, acl_match_str, ACL_USE_L7RTR_VOLATILE },
7281 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
7282 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
7283 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
7284 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
7285 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
7286 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
7287 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
7288 { "shdr_val", acl_parse_int, acl_fetch_shdr_val,acl_match_int, ACL_USE_L7RTR_VOLATILE },
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]7289 { "shdr_ip", acl_parse_ip, acl_fetch_shdr_ip, acl_match_ip, ACL_USE_L7RTR_VOLATILE },
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]7290
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]7291 { "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE },
7292 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
7293 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
7294 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
7295 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
7296 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
7297 { "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]7298
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]7299#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7300 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
7301 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
7302 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
7303 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
7304 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
7305 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
7306 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
7307
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7308 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
7309 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
7310 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
7311 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
7312 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
7313 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
7314 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
7315 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7316#endif
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7317
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]7318 { "http_auth", acl_parse_nothing, acl_fetch_http_auth, acl_match_auth },
7319 { "http_auth_group", acl_parse_strcat, acl_fetch_http_auth, acl_match_auth },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7320 { NULL, NULL, NULL, NULL },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]7321}};
7322
7323
7324__attribute__((constructor))
7325static void __http_protocol_init(void)
7326{
7327 acl_register_keywords(&acl_kws);
7328}
7329
7330
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]7331/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]7332 * Local variables:
7333 * c-indent-level: 8
7334 * c-basic-offset: 8
7335 * End:
7336 */