Gitiles
Code Review Sign In
git01.mediatek.com / haproxy / 5e8949cf84352405541358da502998dc57ba533c / . / src / proto_http.c
blob: e8fc4afeabd54e1a4ad0cf705a91691d3103d686 [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1/*
2 * HTTP protocol analyzer
3 *
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]4 * Copyright 2000-2009 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>
27#include <common/compat.h>
28#include <common/config.h>
Willy Tarreaua4cd1f52006-12-16 19:57:26 +0100[diff] [blame]29#include <common/debug.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]30#include <common/memory.h>
31#include <common/mini-clist.h>
32#include <common/standard.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200[diff] [blame]33#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200[diff] [blame]34#include <common/time.h>
35#include <common/uri_auth.h>
36#include <common/version.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]37
38#include <types/capture.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]39#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]40
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]41#include <proto/acl.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]42#include <proto/backend.h>
43#include <proto/buffers.h>
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]44#include <proto/checks.h>
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]45#include <proto/client.h>
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]46#include <proto/dumpstats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]47#include <proto/fd.h>
48#include <proto/log.h>
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]49#include <proto/hdr_idx.h>
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]50#include <proto/proto_tcp.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]51#include <proto/proto_http.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]52#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]53#include <proto/queue.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]54#include <proto/server.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]55#include <proto/session.h>
Willy Tarreaucff64112008-11-03 06:26:53 +0100[diff] [blame]56#include <proto/stream_interface.h>
Willy Tarreau2d212792008-08-27 21:41:35 +0200[diff] [blame]57#include <proto/stream_sock.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]58#include <proto/task.h>
59
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]60const char HTTP_100[] =
61 "HTTP/1.1 100 Continue\r\n\r\n";
62
63const struct chunk http_100_chunk = {
64 .str = (char *)&HTTP_100,
65 .len = sizeof(HTTP_100)-1
66};
67
Willy Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]68/* This is used by remote monitoring */
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]69const char HTTP_200[] =
Willy Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]70 "HTTP/1.0 200 OK\r\n"
71 "Cache-Control: no-cache\r\n"
72 "Connection: close\r\n"
73 "Content-Type: text/html\r\n"
74 "\r\n"
75 "<html><body><h1>200 OK</h1>\nHAProxy: service ready.\n</body></html>\n";
76
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]77const struct chunk http_200_chunk = {
78 .str = (char *)&HTTP_200,
79 .len = sizeof(HTTP_200)-1
80};
81
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]82const char *HTTP_301 =
83 "HTTP/1.0 301 Moved Permantenly\r\n"
84 "Cache-Control: no-cache\r\n"
85 "Connection: close\r\n"
86 "Location: "; /* not terminated since it will be concatenated with the URL */
87
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]88const char *HTTP_302 =
89 "HTTP/1.0 302 Found\r\n"
90 "Cache-Control: no-cache\r\n"
91 "Connection: close\r\n"
92 "Location: "; /* not terminated since it will be concatenated with the URL */
93
94/* same as 302 except that the browser MUST retry with the GET method */
95const char *HTTP_303 =
96 "HTTP/1.0 303 See Other\r\n"
97 "Cache-Control: no-cache\r\n"
98 "Connection: close\r\n"
99 "Location: "; /* not terminated since it will be concatenated with the URL */
100
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]101/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
102const char *HTTP_401_fmt =
103 "HTTP/1.0 401 Unauthorized\r\n"
104 "Cache-Control: no-cache\r\n"
105 "Connection: close\r\n"
Willy Tarreau791d66d2006-07-08 16:53:38 +0200[diff] [blame]106 "Content-Type: text/html\r\n"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]107 "WWW-Authenticate: Basic realm=\"%s\"\r\n"
108 "\r\n"
109 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
110
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]111
112const int http_err_codes[HTTP_ERR_SIZE] = {
113 [HTTP_ERR_400] = 400,
114 [HTTP_ERR_403] = 403,
115 [HTTP_ERR_408] = 408,
116 [HTTP_ERR_500] = 500,
117 [HTTP_ERR_502] = 502,
118 [HTTP_ERR_503] = 503,
119 [HTTP_ERR_504] = 504,
120};
121
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]122static const char *http_err_msgs[HTTP_ERR_SIZE] = {
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]123 [HTTP_ERR_400] =
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]124 "HTTP/1.0 400 Bad request\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]125 "Cache-Control: no-cache\r\n"
126 "Connection: close\r\n"
127 "Content-Type: text/html\r\n"
128 "\r\n"
129 "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
130
131 [HTTP_ERR_403] =
132 "HTTP/1.0 403 Forbidden\r\n"
133 "Cache-Control: no-cache\r\n"
134 "Connection: close\r\n"
135 "Content-Type: text/html\r\n"
136 "\r\n"
137 "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
138
139 [HTTP_ERR_408] =
140 "HTTP/1.0 408 Request Time-out\r\n"
141 "Cache-Control: no-cache\r\n"
142 "Connection: close\r\n"
143 "Content-Type: text/html\r\n"
144 "\r\n"
145 "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
146
147 [HTTP_ERR_500] =
148 "HTTP/1.0 500 Server Error\r\n"
149 "Cache-Control: no-cache\r\n"
150 "Connection: close\r\n"
151 "Content-Type: text/html\r\n"
152 "\r\n"
153 "<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
154
155 [HTTP_ERR_502] =
156 "HTTP/1.0 502 Bad Gateway\r\n"
157 "Cache-Control: no-cache\r\n"
158 "Connection: close\r\n"
159 "Content-Type: text/html\r\n"
160 "\r\n"
161 "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
162
163 [HTTP_ERR_503] =
164 "HTTP/1.0 503 Service Unavailable\r\n"
165 "Cache-Control: no-cache\r\n"
166 "Connection: close\r\n"
167 "Content-Type: text/html\r\n"
168 "\r\n"
169 "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
170
171 [HTTP_ERR_504] =
172 "HTTP/1.0 504 Gateway Time-out\r\n"
173 "Cache-Control: no-cache\r\n"
174 "Connection: close\r\n"
175 "Content-Type: text/html\r\n"
176 "\r\n"
177 "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
178
179};
180
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]181/* We must put the messages here since GCC cannot initialize consts depending
182 * on strlen().
183 */
184struct chunk http_err_chunks[HTTP_ERR_SIZE];
185
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]186#define FD_SETS_ARE_BITFIELDS
187#ifdef FD_SETS_ARE_BITFIELDS
188/*
189 * This map is used with all the FD_* macros to check whether a particular bit
190 * is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
191 * which should be encoded. When FD_ISSET() returns non-zero, it means that the
192 * byte should be encoded. Be careful to always pass bytes from 0 to 255
193 * exclusively to the macros.
194 */
195fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
196fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
197
198#else
199#error "Check if your OS uses bitfields for fd_sets"
200#endif
201
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]202void init_proto_http()
203{
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]204 int i;
205 char *tmp;
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]206 int msg;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]207
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]208 for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
209 if (!http_err_msgs[msg]) {
210 Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
211 abort();
212 }
213
214 http_err_chunks[msg].str = (char *)http_err_msgs[msg];
215 http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
216 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]217
218 /* initialize the log header encoding map : '{|}"#' should be encoded with
219 * '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
220 * URL encoding only requires '"', '#' to be encoded as well as non-
221 * printable characters above.
222 */
223 memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
224 memset(url_encode_map, 0, sizeof(url_encode_map));
225 for (i = 0; i < 32; i++) {
226 FD_SET(i, hdr_encode_map);
227 FD_SET(i, url_encode_map);
228 }
229 for (i = 127; i < 256; i++) {
230 FD_SET(i, hdr_encode_map);
231 FD_SET(i, url_encode_map);
232 }
233
234 tmp = "\"#{|}";
235 while (*tmp) {
236 FD_SET(*tmp, hdr_encode_map);
237 tmp++;
238 }
239
240 tmp = "\"#";
241 while (*tmp) {
242 FD_SET(*tmp, url_encode_map);
243 tmp++;
244 }
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]245
246 /* memory allocations */
247 pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]248 pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]249}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]250
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]251/*
252 * We have 26 list of methods (1 per first letter), each of which can have
253 * up to 3 entries (2 valid, 1 null).
254 */
255struct http_method_desc {
256 http_meth_t meth;
257 int len;
258 const char text[8];
259};
260
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]261const struct http_method_desc http_methods[26][3] = {
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]262 ['C' - 'A'] = {
263 [0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
264 },
265 ['D' - 'A'] = {
266 [0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
267 },
268 ['G' - 'A'] = {
269 [0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
270 },
271 ['H' - 'A'] = {
272 [0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
273 },
274 ['P' - 'A'] = {
275 [0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
276 [1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
277 },
278 ['T' - 'A'] = {
279 [0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
280 },
281 /* rest is empty like this :
282 * [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
283 */
284};
285
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]286/* 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]287 * table than to perform a boolean AND or OR between two tests. Refer to
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]288 * RFC2616 for those chars.
289 */
290
291const char http_is_spht[256] = {
292 [' '] = 1, ['\t'] = 1,
293};
294
295const char http_is_crlf[256] = {
296 ['\r'] = 1, ['\n'] = 1,
297};
298
299const char http_is_lws[256] = {
300 [' '] = 1, ['\t'] = 1,
301 ['\r'] = 1, ['\n'] = 1,
302};
303
304const char http_is_sep[256] = {
305 ['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
306 ['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
307 ['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
308 ['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
309 [' '] = 1, ['\t'] = 1, ['\\'] = 1,
310};
311
312const char http_is_ctl[256] = {
313 [0 ... 31] = 1,
314 [127] = 1,
315};
316
317/*
318 * A token is any ASCII char that is neither a separator nor a CTL char.
319 * Do not overwrite values in assignment since gcc-2.95 will not handle
320 * them correctly. Instead, define every non-CTL char's status.
321 */
322const char http_is_token[256] = {
323 [' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
324 ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
325 ['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
326 [','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
327 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
328 ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
329 ['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
330 ['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
331 ['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
332 ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
333 ['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
334 ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
335 ['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
336 ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
337 ['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
338 ['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
339 ['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
340 ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
341 ['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
342 ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
343 ['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
344 ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
345 ['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
346 ['|'] = 1, ['}'] = 0, ['~'] = 1,
347};
348
349
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]350/*
351 * An http ver_token is any ASCII which can be found in an HTTP version,
352 * which includes 'H', 'T', 'P', '/', '.' and any digit.
353 */
354const char http_is_ver_token[256] = {
355 ['.'] = 1, ['/'] = 1,
356 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
357 ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
358 ['H'] = 1, ['P'] = 1, ['T'] = 1,
359};
360
361
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]362/*
363 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
364 * CRLF. Text length is measured first, so it cannot be NULL.
365 * The header is also automatically added to the index <hdr_idx>, and the end
366 * of headers is automatically adjusted. The number of bytes added is returned
367 * on success, otherwise <0 is returned indicating an error.
368 */
369int http_header_add_tail(struct buffer *b, struct http_msg *msg,
370 struct hdr_idx *hdr_idx, const char *text)
371{
372 int bytes, len;
373
374 len = strlen(text);
375 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
376 if (!bytes)
377 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]378 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]379 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
380}
381
382/*
383 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
384 * CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
385 * the buffer is only opened and the space reserved, but nothing is copied.
386 * The header is also automatically added to the index <hdr_idx>, and the end
387 * of headers is automatically adjusted. The number of bytes added is returned
388 * on success, otherwise <0 is returned indicating an error.
389 */
390int http_header_add_tail2(struct buffer *b, struct http_msg *msg,
391 struct hdr_idx *hdr_idx, const char *text, int len)
392{
393 int bytes;
394
395 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
396 if (!bytes)
397 return -1;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]398 http_msg_move_end(msg, bytes);
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]399 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
400}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]401
402/*
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]403 * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
404 * If so, returns the position of the first non-space character relative to
405 * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
406 * to return a pointer to the place after the first space. Returns 0 if the
407 * header name does not match. Checks are case-insensitive.
408 */
409int http_header_match2(const char *hdr, const char *end,
410 const char *name, int len)
411{
412 const char *val;
413
414 if (hdr + len >= end)
415 return 0;
416 if (hdr[len] != ':')
417 return 0;
418 if (strncasecmp(hdr, name, len) != 0)
419 return 0;
420 val = hdr + len + 1;
421 while (val < end && HTTP_IS_SPHT(*val))
422 val++;
423 if ((val >= end) && (len + 2 <= end - hdr))
424 return len + 2; /* we may replace starting from second space */
425 return val - hdr;
426}
427
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]428/* Find the end of the header value contained between <s> and <e>.
429 * See RFC2616, par 2.2 for more information. Note that it requires
430 * a valid header to return a valid result.
431 */
432const char *find_hdr_value_end(const char *s, const char *e)
433{
434 int quoted, qdpair;
435
436 quoted = qdpair = 0;
437 for (; s < e; s++) {
438 if (qdpair) qdpair = 0;
439 else if (quoted && *s == '\\') qdpair = 1;
440 else if (quoted && *s == '"') quoted = 0;
441 else if (*s == '"') quoted = 1;
442 else if (*s == ',') return s;
443 }
444 return s;
445}
446
447/* Find the first or next occurrence of header <name> in message buffer <sol>
448 * using headers index <idx>, and return it in the <ctx> structure. This
449 * structure holds everything necessary to use the header and find next
450 * occurrence. If its <idx> member is 0, the header is searched from the
451 * beginning. Otherwise, the next occurrence is returned. The function returns
452 * 1 when it finds a value, and 0 when there is no more.
453 */
454int http_find_header2(const char *name, int len,
455 const char *sol, struct hdr_idx *idx,
456 struct hdr_ctx *ctx)
457{
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]458 const char *eol, *sov;
459 int cur_idx;
460
461 if (ctx->idx) {
462 /* We have previously returned a value, let's search
463 * another one on the same line.
464 */
465 cur_idx = ctx->idx;
466 sol = ctx->line;
467 sov = sol + ctx->val + ctx->vlen;
468 eol = sol + idx->v[cur_idx].len;
469
470 if (sov >= eol)
471 /* no more values in this header */
472 goto next_hdr;
473
474 /* values remaining for this header, skip the comma */
475 sov++;
476 while (sov < eol && http_is_lws[(unsigned char)*sov])
477 sov++;
478
479 goto return_hdr;
480 }
481
482 /* first request for this header */
483 sol += hdr_idx_first_pos(idx);
484 cur_idx = hdr_idx_first_idx(idx);
485
486 while (cur_idx) {
487 eol = sol + idx->v[cur_idx].len;
488
Willy Tarreau1ad7c6d2007-06-10 21:42:55 +0200[diff] [blame]489 if (len == 0) {
490 /* No argument was passed, we want any header.
491 * To achieve this, we simply build a fake request. */
492 while (sol + len < eol && sol[len] != ':')
493 len++;
494 name = sol;
495 }
496
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]497 if ((len < eol - sol) &&
498 (sol[len] == ':') &&
499 (strncasecmp(sol, name, len) == 0)) {
500
501 sov = sol + len + 1;
502 while (sov < eol && http_is_lws[(unsigned char)*sov])
503 sov++;
504 return_hdr:
505 ctx->line = sol;
506 ctx->idx = cur_idx;
507 ctx->val = sov - sol;
508
509 eol = find_hdr_value_end(sov, eol);
510 ctx->vlen = eol - sov;
511 return 1;
512 }
513 next_hdr:
514 sol = eol + idx->v[cur_idx].cr + 1;
515 cur_idx = idx->v[cur_idx].next;
516 }
517 return 0;
518}
519
520int http_find_header(const char *name,
521 const char *sol, struct hdr_idx *idx,
522 struct hdr_ctx *ctx)
523{
524 return http_find_header2(name, strlen(name), sol, idx, ctx);
525}
526
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]527/* This function handles a server error at the stream interface level. The
528 * stream interface is assumed to be already in a closed state. An optional
529 * message is copied into the input buffer, and an HTTP status code stored.
530 * The error flags are set to the values in arguments. Any pending request
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]531 * in this buffer will be lost.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]532 */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]533static void http_server_error(struct session *t, struct stream_interface *si,
534 int err, int finst, int status, const struct chunk *msg)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]535{
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]536 buffer_erase(si->ob);
537 buffer_erase(si->ib);
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]538 buffer_auto_close(si->ib);
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]539 if (status > 0 && msg) {
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]540 t->txn.status = status;
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]541 buffer_write(si->ib, msg->str, msg->len);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]542 }
543 if (!(t->flags & SN_ERR_MASK))
544 t->flags |= err;
545 if (!(t->flags & SN_FINST_MASK))
546 t->flags |= finst;
547}
548
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]549/* This function returns the appropriate error location for the given session
550 * and message.
551 */
552
553struct chunk *error_message(struct session *s, int msgnum)
554{
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]555 if (s->be->errmsg[msgnum].str)
556 return &s->be->errmsg[msgnum];
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]557 else if (s->fe->errmsg[msgnum].str)
558 return &s->fe->errmsg[msgnum];
559 else
560 return &http_err_chunks[msgnum];
561}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]562
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]563/*
564 * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
565 * string), HTTP_METH_OTHER for unknown methods, or the identified method.
566 */
567static http_meth_t find_http_meth(const char *str, const int len)
568{
569 unsigned char m;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]570 const struct http_method_desc *h;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]571
572 m = ((unsigned)*str - 'A');
573
574 if (m < 26) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]575 for (h = http_methods[m]; h->len > 0; h++) {
576 if (unlikely(h->len != len))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]577 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]578 if (likely(memcmp(str, h->text, h->len) == 0))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]579 return h->meth;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]580 };
581 return HTTP_METH_OTHER;
582 }
583 return HTTP_METH_NONE;
584
585}
586
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]587/* Parse the URI from the given transaction (which is assumed to be in request
588 * phase) and look for the "/" beginning the PATH. If not found, return NULL.
589 * It is returned otherwise.
590 */
591static char *
592http_get_path(struct http_txn *txn)
593{
594 char *ptr, *end;
595
Willy Tarreaua95a1f42010-01-03 13:04:35 +0100[diff] [blame]596 ptr = txn->req.sol - txn->req.som + txn->req.sl.rq.u;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]597 end = ptr + txn->req.sl.rq.u_l;
598
599 if (ptr >= end)
600 return NULL;
601
602 /* RFC2616, par. 5.1.2 :
603 * Request-URI = "*" | absuri | abspath | authority
604 */
605
606 if (*ptr == '*')
607 return NULL;
608
609 if (isalpha((unsigned char)*ptr)) {
610 /* this is a scheme as described by RFC3986, par. 3.1 */
611 ptr++;
612 while (ptr < end &&
613 (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
614 ptr++;
615 /* skip '://' */
616 if (ptr == end || *ptr++ != ':')
617 return NULL;
618 if (ptr == end || *ptr++ != '/')
619 return NULL;
620 if (ptr == end || *ptr++ != '/')
621 return NULL;
622 }
623 /* skip [user[:passwd]@]host[:[port]] */
624
625 while (ptr < end && *ptr != '/')
626 ptr++;
627
628 if (ptr == end)
629 return NULL;
630
631 /* OK, we got the '/' ! */
632 return ptr;
633}
634
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]635/* Returns a 302 for a redirectable request. This may only be called just after
636 * the stream interface has moved to SI_ST_ASS. Unprocessable requests are
637 * left unchanged and will follow normal proxy processing.
638 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]639void perform_http_redirect(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]640{
641 struct http_txn *txn;
642 struct chunk rdr;
643 char *path;
644 int len;
645
646 /* 1: create the response header */
647 rdr.len = strlen(HTTP_302);
648 rdr.str = trash;
649 memcpy(rdr.str, HTTP_302, rdr.len);
650
651 /* 2: add the server's prefix */
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]652 if (rdr.len + s->srv->rdr_len > rdr.size)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]653 return;
654
655 memcpy(rdr.str + rdr.len, s->srv->rdr_pfx, s->srv->rdr_len);
656 rdr.len += s->srv->rdr_len;
657
658 /* 3: add the request URI */
659 txn = &s->txn;
660 path = http_get_path(txn);
661 if (!path)
662 return;
663
Willy Tarreaua95a1f42010-01-03 13:04:35 +0100[diff] [blame]664 len = txn->req.sl.rq.u_l + (txn->req.sol-txn->req.som+txn->req.sl.rq.u) - path;
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]665 if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]666 return;
667
668 memcpy(rdr.str + rdr.len, path, len);
669 rdr.len += len;
670 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
671 rdr.len += 4;
672
673 /* prepare to return without error. */
Willy Tarreau99126c32008-11-27 10:30:51 +0100[diff] [blame]674 si->shutr(si);
675 si->shutw(si);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]676 si->err_type = SI_ET_NONE;
677 si->err_loc = NULL;
678 si->state = SI_ST_CLO;
679
680 /* send the message */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]681 http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]682
683 /* FIXME: we should increase a counter of redirects per server and per backend. */
684 if (s->srv)
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]685 srv_inc_sess_ctr(s->srv);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]686}
687
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]688/* Return the error message corresponding to si->err_type. It is assumed
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]689 * that the server side is closed. Note that err_type is actually a
690 * bitmask, where almost only aborts may be cumulated with other
691 * values. We consider that aborted operations are more important
692 * than timeouts or errors due to the fact that nobody else in the
693 * logs might explain incomplete retries. All others should avoid
694 * being cumulated. It should normally not be possible to have multiple
695 * aborts at once, but just in case, the first one in sequence is reported.
696 */
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]697void http_return_srv_error(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]698{
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]699 int err_type = si->err_type;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]700
701 if (err_type & SI_ET_QUEUE_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]702 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
703 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]704 else if (err_type & SI_ET_CONN_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]705 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
706 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]707 else if (err_type & SI_ET_QUEUE_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]708 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
709 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]710 else if (err_type & SI_ET_QUEUE_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]711 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q,
712 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]713 else if (err_type & SI_ET_CONN_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]714 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
715 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]716 else if (err_type & SI_ET_CONN_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]717 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
718 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]719 else /* SI_ET_CONN_OTHER and others */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]720 http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
721 500, error_message(s, HTTP_ERR_500));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]722}
723
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]724extern const char sess_term_cond[8];
725extern const char sess_fin_state[8];
726extern const char *monthname[12];
727const char sess_cookie[4] = "NIDV"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie */
728const char sess_set_cookie[8] = "N1I3PD5R"; /* No set-cookie, unknown, Set-Cookie Inserted, unknown,
729 Set-cookie seen and left unchanged (passive), Set-cookie Deleted,
730 unknown, Set-cookie Rewritten */
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]731struct pool_head *pool2_requri;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]732struct pool_head *pool2_capture;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]733
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]734void http_sess_clflog(struct session *s)
735{
736 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
737 struct proxy *fe = s->fe;
738 struct proxy *be = s->be;
739 struct proxy *prx_log;
740 struct http_txn *txn = &s->txn;
741 int tolog, level, err;
742 char *uri, *h;
743 char *svid;
744 struct tm tm;
745 static char tmpline[MAX_SYSLOG_LEN];
746 int hdr;
747 size_t w;
748 int t_request;
749
750 prx_log = fe;
751 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
752 (s->conn_retries != be->conn_retries) ||
753 txn->status >= 500;
754
755 if (s->cli_addr.ss_family == AF_INET)
756 inet_ntop(AF_INET,
757 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
758 pn, sizeof(pn));
759 else
760 inet_ntop(AF_INET6,
761 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
762 pn, sizeof(pn));
763
764 get_gmtime(s->logs.accept_date.tv_sec, &tm);
765
766 /* FIXME: let's limit ourselves to frontend logging for now. */
767 tolog = fe->to_log;
768
769 h = tmpline;
770
771 w = snprintf(h, sizeof(tmpline),
772 "%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
773 pn,
774 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
775 tm.tm_hour, tm.tm_min, tm.tm_sec);
776 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
777 goto trunc;
778 h += w;
779
780 if (h >= tmpline + sizeof(tmpline) - 4)
781 goto trunc;
782
783 *(h++) = ' ';
784 *(h++) = '\"';
785 uri = txn->uri ? txn->uri : "<BADREQ>";
786 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
787 '#', url_encode_map, uri);
788 *(h++) = '\"';
789
790 w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
791 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
792 goto trunc;
793 h += w;
794
795 if (h >= tmpline + sizeof(tmpline) - 9)
796 goto trunc;
797 memcpy(h, " \"-\" \"-\"", 8);
798 h += 8;
799
800 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
801 " %d %03d",
802 (s->cli_addr.ss_family == AF_INET) ?
803 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
804 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
805 (int)s->logs.accept_date.tv_usec/1000);
806 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
807 goto trunc;
808 h += w;
809
810 w = strlen(fe->id);
811 if (h >= tmpline + sizeof(tmpline) - 4 - w)
812 goto trunc;
813 *(h++) = ' ';
814 *(h++) = '\"';
815 memcpy(h, fe->id, w);
816 h += w;
817 *(h++) = '\"';
818
819 w = strlen(be->id);
820 if (h >= tmpline + sizeof(tmpline) - 4 - w)
821 goto trunc;
822 *(h++) = ' ';
823 *(h++) = '\"';
824 memcpy(h, be->id, w);
825 h += w;
826 *(h++) = '\"';
827
828 svid = (tolog & LW_SVID) ?
829 (s->data_source != DATA_SRC_STATS) ?
830 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
831
832 w = strlen(svid);
833 if (h >= tmpline + sizeof(tmpline) - 4 - w)
834 goto trunc;
835 *(h++) = ' ';
836 *(h++) = '\"';
837 memcpy(h, svid, w);
838 h += w;
839 *(h++) = '\"';
840
841 t_request = -1;
842 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
843 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
844 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
845 " %d %ld %ld %ld %ld",
846 t_request,
847 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
848 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
849 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
850 s->logs.t_close);
851 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
852 goto trunc;
853 h += w;
854
855 if (h >= tmpline + sizeof(tmpline) - 8)
856 goto trunc;
857 *(h++) = ' ';
858 *(h++) = '\"';
859 *(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
860 *(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
861 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
862 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
863 *(h++) = '\"';
864
865 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
866 " %d %d %d %d %d %ld %ld",
867 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
868 (s->conn_retries > 0) ? (be->conn_retries - s->conn_retries) : be->conn_retries,
869 s->logs.srv_queue_size, s->logs.prx_queue_size);
870
871 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
872 goto trunc;
873 h += w;
874
875 if (txn->cli_cookie) {
876 w = strlen(txn->cli_cookie);
877 if (h >= tmpline + sizeof(tmpline) - 4 - w)
878 goto trunc;
879 *(h++) = ' ';
880 *(h++) = '\"';
881 memcpy(h, txn->cli_cookie, w);
882 h += w;
883 *(h++) = '\"';
884 } else {
885 if (h >= tmpline + sizeof(tmpline) - 5)
886 goto trunc;
887 memcpy(h, " \"-\"", 4);
888 h += 4;
889 }
890
891 if (txn->srv_cookie) {
892 w = strlen(txn->srv_cookie);
893 if (h >= tmpline + sizeof(tmpline) - 4 - w)
894 goto trunc;
895 *(h++) = ' ';
896 *(h++) = '\"';
897 memcpy(h, txn->srv_cookie, w);
898 h += w;
899 *(h++) = '\"';
900 } else {
901 if (h >= tmpline + sizeof(tmpline) - 5)
902 goto trunc;
903 memcpy(h, " \"-\"", 4);
904 h += 4;
905 }
906
907 if ((fe->to_log & LW_REQHDR) && txn->req.cap) {
908 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
909 if (h >= sizeof (tmpline) + tmpline - 4)
910 goto trunc;
911 *(h++) = ' ';
912 *(h++) = '\"';
913 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
914 '#', hdr_encode_map, txn->req.cap[hdr]);
915 *(h++) = '\"';
916 }
917 }
918
919 if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) {
920 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
921 if (h >= sizeof (tmpline) + tmpline - 4)
922 goto trunc;
923 *(h++) = ' ';
924 *(h++) = '\"';
925 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
926 '#', hdr_encode_map, txn->rsp.cap[hdr]);
927 *(h++) = '\"';
928 }
929 }
930
931trunc:
932 *h = '\0';
933
934 level = LOG_INFO;
935 if (err && (fe->options2 & PR_O2_LOGERRORS))
936 level = LOG_ERR;
937
938 send_log(prx_log, level, "%s\n", tmpline);
939
940 s->logs.logwait = 0;
941}
942
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]943/*
944 * send a log for the session when we have enough info about it.
945 * Will not log if the frontend has no log defined.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]946 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]947void http_sess_log(struct session *s)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]948{
949 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
950 struct proxy *fe = s->fe;
951 struct proxy *be = s->be;
952 struct proxy *prx_log;
953 struct http_txn *txn = &s->txn;
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]954 int tolog, level, err;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]955 char *uri, *h;
956 char *svid;
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]957 struct tm tm;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]958 static char tmpline[MAX_SYSLOG_LEN];
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]959 int t_request;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]960 int hdr;
961
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]962 /* if we don't want to log normal traffic, return now */
963 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
964 (s->conn_retries != be->conn_retries) ||
965 txn->status >= 500;
966 if (!err && (fe->options2 & PR_O2_NOLOGNORM))
967 return;
968
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]969 if (fe->logfac1 < 0 && fe->logfac2 < 0)
970 return;
971 prx_log = fe;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]972
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]973 if (prx_log->options2 & PR_O2_CLFLOG)
974 return http_sess_clflog(s);
975
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]976 if (s->cli_addr.ss_family == AF_INET)
977 inet_ntop(AF_INET,
978 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
979 pn, sizeof(pn));
980 else
981 inet_ntop(AF_INET6,
982 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
983 pn, sizeof(pn));
984
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200[diff] [blame]985 get_localtime(s->logs.accept_date.tv_sec, &tm);
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]986
987 /* FIXME: let's limit ourselves to frontend logging for now. */
988 tolog = fe->to_log;
989
990 h = tmpline;
991 if (fe->to_log & LW_REQHDR &&
992 txn->req.cap &&
993 (h < tmpline + sizeof(tmpline) - 10)) {
994 *(h++) = ' ';
995 *(h++) = '{';
996 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
997 if (hdr)
998 *(h++) = '|';
999 if (txn->req.cap[hdr] != NULL)
1000 h = encode_string(h, tmpline + sizeof(tmpline) - 7,
1001 '#', hdr_encode_map, txn->req.cap[hdr]);
1002 }
1003 *(h++) = '}';
1004 }
1005
1006 if (fe->to_log & LW_RSPHDR &&
1007 txn->rsp.cap &&
1008 (h < tmpline + sizeof(tmpline) - 7)) {
1009 *(h++) = ' ';
1010 *(h++) = '{';
1011 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1012 if (hdr)
1013 *(h++) = '|';
1014 if (txn->rsp.cap[hdr] != NULL)
1015 h = encode_string(h, tmpline + sizeof(tmpline) - 4,
1016 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1017 }
1018 *(h++) = '}';
1019 }
1020
1021 if (h < tmpline + sizeof(tmpline) - 4) {
1022 *(h++) = ' ';
1023 *(h++) = '"';
1024 uri = txn->uri ? txn->uri : "<BADREQ>";
1025 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
1026 '#', url_encode_map, uri);
1027 *(h++) = '"';
1028 }
1029 *h = '\0';
1030
1031 svid = (tolog & LW_SVID) ?
1032 (s->data_source != DATA_SRC_STATS) ?
1033 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
1034
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1035 t_request = -1;
1036 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
1037 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
1038
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1039 level = LOG_INFO;
1040 if (err && (fe->options2 & PR_O2_LOGERRORS))
1041 level = LOG_ERR;
1042
1043 send_log(prx_log, level,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1044 "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1045 " %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld"
1046 " %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]1047 pn,
1048 (s->cli_addr.ss_family == AF_INET) ?
1049 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
1050 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1051 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1052 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]1053 fe->id, be->id, svid,
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1054 t_request,
1055 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1056 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
1057 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
1058 (tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
1059 txn->status,
Willy Tarreau8b3977f2008-01-18 11:16:32 +0100[diff] [blame]1060 (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1061 txn->cli_cookie ? txn->cli_cookie : "-",
1062 txn->srv_cookie ? txn->srv_cookie : "-",
1063 sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
1064 sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
1065 (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
1066 (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-',
1067 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
Krzysztof Piotr Oledzki25b501a2008-01-06 16:36:16 +0100[diff] [blame]1068 (s->flags & SN_REDISP)?"+":"",
1069 (s->conn_retries>0)?(be->conn_retries - s->conn_retries):be->conn_retries,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1070 s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline);
1071
1072 s->logs.logwait = 0;
1073}
1074
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1075
1076/*
1077 * Capture headers from message starting at <som> according to header list
1078 * <cap_hdr>, and fill the <idx> structure appropriately.
1079 */
1080void capture_headers(char *som, struct hdr_idx *idx,
1081 char **cap, struct cap_hdr *cap_hdr)
1082{
1083 char *eol, *sol, *col, *sov;
1084 int cur_idx;
1085 struct cap_hdr *h;
1086 int len;
1087
1088 sol = som + hdr_idx_first_pos(idx);
1089 cur_idx = hdr_idx_first_idx(idx);
1090
1091 while (cur_idx) {
1092 eol = sol + idx->v[cur_idx].len;
1093
1094 col = sol;
1095 while (col < eol && *col != ':')
1096 col++;
1097
1098 sov = col + 1;
1099 while (sov < eol && http_is_lws[(unsigned char)*sov])
1100 sov++;
1101
1102 for (h = cap_hdr; h; h = h->next) {
1103 if ((h->namelen == col - sol) &&
1104 (strncasecmp(sol, h->name, h->namelen) == 0)) {
1105 if (cap[h->index] == NULL)
1106 cap[h->index] =
Willy Tarreaucf7f3202007-05-13 22:46:04 +0200[diff] [blame]1107 pool_alloc2(h->pool);
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1108
1109 if (cap[h->index] == NULL) {
1110 Alert("HTTP capture : out of memory.\n");
1111 continue;
1112 }
1113
1114 len = eol - sov;
1115 if (len > h->len)
1116 len = h->len;
1117
1118 memcpy(cap[h->index], sov, len);
1119 cap[h->index][len]=0;
1120 }
1121 }
1122 sol = eol + idx->v[cur_idx].cr + 1;
1123 cur_idx = idx->v[cur_idx].next;
1124 }
1125}
1126
1127
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1128/* either we find an LF at <ptr> or we jump to <bad>.
1129 */
1130#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
1131
1132/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
1133 * otherwise to <http_msg_ood> with <state> set to <st>.
1134 */
1135#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
1136 ptr++; \
1137 if (likely(ptr < end)) \
1138 goto good; \
1139 else { \
1140 state = (st); \
1141 goto http_msg_ood; \
1142 } \
1143 } while (0)
1144
1145
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1146/*
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1147 * This function parses a status line between <ptr> and <end>, starting with
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1148 * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
1149 * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
1150 * will give undefined results.
1151 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1152 * and that msg->sol points to the beginning of the response.
1153 * If a complete line is found (which implies that at least one CR or LF is
1154 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1155 * returned indicating an incomplete line (which does not mean that parts have
1156 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1157 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1158 * upon next call.
1159 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1160 * This function was intentionally designed to be called from
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1161 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1162 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1163 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1164 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1165const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
1166 unsigned int state, const char *ptr, const char *end,
1167 char **ret_ptr, unsigned int *ret_state)
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1168{
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1169 switch (state) {
1170 http_msg_rpver:
1171 case HTTP_MSG_RPVER:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1172 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1173 EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
1174
1175 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1176 msg->sl.st.v_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1177 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1178 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1179 state = HTTP_MSG_ERROR;
1180 break;
1181
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1182 http_msg_rpver_sp:
1183 case HTTP_MSG_RPVER_SP:
1184 if (likely(!HTTP_IS_LWS(*ptr))) {
1185 msg->sl.st.c = ptr - msg_buf;
1186 goto http_msg_rpcode;
1187 }
1188 if (likely(HTTP_IS_SPHT(*ptr)))
1189 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1190 /* so it's a CR/LF, this is invalid */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1191 state = HTTP_MSG_ERROR;
1192 break;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1193
1194 http_msg_rpcode:
1195 case HTTP_MSG_RPCODE:
1196 if (likely(!HTTP_IS_LWS(*ptr)))
1197 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
1198
1199 if (likely(HTTP_IS_SPHT(*ptr))) {
1200 msg->sl.st.c_l = (ptr - msg_buf) - msg->sl.st.c;
1201 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1202 }
1203
1204 /* so it's a CR/LF, so there is no reason phrase */
1205 msg->sl.st.c_l = (ptr - msg_buf) - msg->sl.st.c;
1206 http_msg_rsp_reason:
1207 /* FIXME: should we support HTTP responses without any reason phrase ? */
1208 msg->sl.st.r = ptr - msg_buf;
1209 msg->sl.st.r_l = 0;
1210 goto http_msg_rpline_eol;
1211
1212 http_msg_rpcode_sp:
1213 case HTTP_MSG_RPCODE_SP:
1214 if (likely(!HTTP_IS_LWS(*ptr))) {
1215 msg->sl.st.r = ptr - msg_buf;
1216 goto http_msg_rpreason;
1217 }
1218 if (likely(HTTP_IS_SPHT(*ptr)))
1219 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1220 /* so it's a CR/LF, so there is no reason phrase */
1221 goto http_msg_rsp_reason;
1222
1223 http_msg_rpreason:
1224 case HTTP_MSG_RPREASON:
1225 if (likely(!HTTP_IS_CRLF(*ptr)))
1226 EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
1227 msg->sl.st.r_l = (ptr - msg_buf) - msg->sl.st.r;
1228 http_msg_rpline_eol:
1229 /* We have seen the end of line. Note that we do not
1230 * necessarily have the \n yet, but at least we know that we
1231 * have EITHER \r OR \n, otherwise the response would not be
1232 * complete. We can then record the response length and return
1233 * to the caller which will be able to register it.
1234 */
1235 msg->sl.st.l = ptr - msg->sol;
1236 return ptr;
1237
1238#ifdef DEBUG_FULL
1239 default:
1240 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1241 exit(1);
1242#endif
1243 }
1244
1245 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1246 /* out of valid data */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1247 if (ret_state)
1248 *ret_state = state;
1249 if (ret_ptr)
1250 *ret_ptr = (char *)ptr;
1251 return NULL;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1252}
1253
1254
1255/*
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1256 * This function parses a request line between <ptr> and <end>, starting with
1257 * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
1258 * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
1259 * will give undefined results.
1260 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1261 * and that msg->sol points to the beginning of the request.
1262 * If a complete line is found (which implies that at least one CR or LF is
1263 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1264 * returned indicating an incomplete line (which does not mean that parts have
1265 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1266 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1267 * upon next call.
1268 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1269 * This function was intentionally designed to be called from
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1270 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1271 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1272 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1273 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1274const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
1275 unsigned int state, const char *ptr, const char *end,
1276 char **ret_ptr, unsigned int *ret_state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1277{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1278 switch (state) {
1279 http_msg_rqmeth:
1280 case HTTP_MSG_RQMETH:
1281 if (likely(HTTP_IS_TOKEN(*ptr)))
1282 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1283
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1284 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1285 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1286 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1287 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1288
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1289 if (likely(HTTP_IS_CRLF(*ptr))) {
1290 /* HTTP 0.9 request */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1291 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1292 http_msg_req09_uri:
1293 msg->sl.rq.u = ptr - msg_buf;
1294 http_msg_req09_uri_e:
1295 msg->sl.rq.u_l = (ptr - msg_buf) - msg->sl.rq.u;
1296 http_msg_req09_ver:
1297 msg->sl.rq.v = ptr - msg_buf;
1298 msg->sl.rq.v_l = 0;
1299 goto http_msg_rqline_eol;
1300 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1301 state = HTTP_MSG_ERROR;
1302 break;
1303
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1304 http_msg_rqmeth_sp:
1305 case HTTP_MSG_RQMETH_SP:
1306 if (likely(!HTTP_IS_LWS(*ptr))) {
1307 msg->sl.rq.u = ptr - msg_buf;
1308 goto http_msg_rquri;
1309 }
1310 if (likely(HTTP_IS_SPHT(*ptr)))
1311 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1312 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1313 goto http_msg_req09_uri;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1314
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1315 http_msg_rquri:
1316 case HTTP_MSG_RQURI:
1317 if (likely(!HTTP_IS_LWS(*ptr)))
1318 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1319
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1320 if (likely(HTTP_IS_SPHT(*ptr))) {
1321 msg->sl.rq.u_l = (ptr - msg_buf) - msg->sl.rq.u;
1322 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1323 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1324
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1325 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1326 goto http_msg_req09_uri_e;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1327
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1328 http_msg_rquri_sp:
1329 case HTTP_MSG_RQURI_SP:
1330 if (likely(!HTTP_IS_LWS(*ptr))) {
1331 msg->sl.rq.v = ptr - msg_buf;
1332 goto http_msg_rqver;
1333 }
1334 if (likely(HTTP_IS_SPHT(*ptr)))
1335 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1336 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1337 goto http_msg_req09_ver;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1338
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1339 http_msg_rqver:
1340 case HTTP_MSG_RQVER:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1341 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1342 EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1343
1344 if (likely(HTTP_IS_CRLF(*ptr))) {
1345 msg->sl.rq.v_l = (ptr - msg_buf) - msg->sl.rq.v;
1346 http_msg_rqline_eol:
1347 /* We have seen the end of line. Note that we do not
1348 * necessarily have the \n yet, but at least we know that we
1349 * have EITHER \r OR \n, otherwise the request would not be
1350 * complete. We can then record the request length and return
1351 * to the caller which will be able to register it.
1352 */
1353 msg->sl.rq.l = ptr - msg->sol;
1354 return ptr;
1355 }
1356
1357 /* neither an HTTP_VER token nor a CRLF */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1358 state = HTTP_MSG_ERROR;
1359 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1360
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1361#ifdef DEBUG_FULL
1362 default:
1363 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1364 exit(1);
1365#endif
1366 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1367
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1368 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1369 /* out of valid data */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1370 if (ret_state)
1371 *ret_state = state;
1372 if (ret_ptr)
1373 *ret_ptr = (char *)ptr;
1374 return NULL;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1375}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1376
1377
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1378/*
1379 * This function parses an HTTP message, either a request or a response,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1380 * depending on the initial msg->msg_state. It can be preempted everywhere
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1381 * when data are missing and recalled at the exact same location with no
1382 * information loss. The header index is re-initialized when switching from
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1383 * 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]1384 * fields. Note that msg->som and msg->sol will be initialized after completing
1385 * the first state, so that none of the msg pointers has to be initialized
1386 * prior to the first call.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1387 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1388void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx)
1389{
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1390 unsigned int state; /* updated only when leaving the FSM */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1391 register char *ptr, *end; /* request pointers, to avoid dereferences */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1392
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1393 state = msg->msg_state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1394 ptr = buf->lr;
1395 end = buf->r;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1396
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1397 if (unlikely(ptr >= end))
1398 goto http_msg_ood;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1399
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1400 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1401 /*
1402 * First, states that are specific to the response only.
1403 * We check them first so that request and headers are
1404 * closer to each other (accessed more often).
1405 */
1406 http_msg_rpbefore:
1407 case HTTP_MSG_RPBEFORE:
1408 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1409 /* we have a start of message, but we have to check
1410 * first if we need to remove some CRLF. We can only
1411 * do this when send_max=0.
1412 */
1413 char *beg = buf->w + buf->send_max;
1414 if (beg >= buf->data + buf->size)
1415 beg -= buf->size;
1416 if (unlikely(ptr != beg)) {
1417 if (buf->send_max)
1418 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1419 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1420 buffer_ignore(buf, ptr - beg);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1421 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1422 msg->som = ptr - buf->data;
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1423 msg->sol = ptr;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1424 hdr_idx_init(idx);
1425 state = HTTP_MSG_RPVER;
1426 goto http_msg_rpver;
1427 }
1428
1429 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1430 goto http_msg_invalid;
1431
1432 if (unlikely(*ptr == '\n'))
1433 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1434 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1435 /* stop here */
1436
1437 http_msg_rpbefore_cr:
1438 case HTTP_MSG_RPBEFORE_CR:
1439 EXPECT_LF_HERE(ptr, http_msg_invalid);
1440 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1441 /* stop here */
1442
1443 http_msg_rpver:
1444 case HTTP_MSG_RPVER:
1445 case HTTP_MSG_RPVER_SP:
1446 case HTTP_MSG_RPCODE:
1447 case HTTP_MSG_RPCODE_SP:
1448 case HTTP_MSG_RPREASON:
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1449 ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1450 &buf->lr, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1451 if (unlikely(!ptr))
1452 return;
1453
1454 /* we have a full response and we know that we have either a CR
1455 * or an LF at <ptr>.
1456 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1457 //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]1458 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1459
1460 msg->sol = ptr;
1461 if (likely(*ptr == '\r'))
1462 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1463 goto http_msg_rpline_end;
1464
1465 http_msg_rpline_end:
1466 case HTTP_MSG_RPLINE_END:
1467 /* msg->sol must point to the first of CR or LF. */
1468 EXPECT_LF_HERE(ptr, http_msg_invalid);
1469 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1470 /* stop here */
1471
1472 /*
1473 * Second, states that are specific to the request only
1474 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1475 http_msg_rqbefore:
1476 case HTTP_MSG_RQBEFORE:
1477 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1478 /* we have a start of message, but we have to check
1479 * first if we need to remove some CRLF. We can only
1480 * do this when send_max=0.
1481 */
1482 char *beg = buf->w + buf->send_max;
1483 if (beg >= buf->data + buf->size)
1484 beg -= buf->size;
1485 if (likely(ptr != beg)) {
1486 if (buf->send_max)
1487 goto http_msg_ood;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1488 /* Remove empty leading lines, as recommended by RFC2616. */
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1489 buffer_ignore(buf, ptr - beg);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1490 }
Willy Tarreau15de77e2010-01-02 21:59:16 +0100[diff] [blame]1491 msg->som = ptr - buf->data;
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]1492 msg->sol = ptr;
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1493 /* we will need this when keep-alive will be supported
1494 hdr_idx_init(idx);
1495 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1496 state = HTTP_MSG_RQMETH;
1497 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1498 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1499
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1500 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1501 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1502
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1503 if (unlikely(*ptr == '\n'))
1504 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1505 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1506 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1507
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1508 http_msg_rqbefore_cr:
1509 case HTTP_MSG_RQBEFORE_CR:
1510 EXPECT_LF_HERE(ptr, http_msg_invalid);
1511 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1512 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1513
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1514 http_msg_rqmeth:
1515 case HTTP_MSG_RQMETH:
1516 case HTTP_MSG_RQMETH_SP:
1517 case HTTP_MSG_RQURI:
1518 case HTTP_MSG_RQURI_SP:
1519 case HTTP_MSG_RQVER:
1520 ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1521 &buf->lr, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1522 if (unlikely(!ptr))
1523 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1524
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1525 /* we have a full request and we know that we have either a CR
1526 * or an LF at <ptr>.
1527 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1528 //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]1529 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1530
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1531 msg->sol = ptr;
1532 if (likely(*ptr == '\r'))
1533 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1534 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1535
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1536 http_msg_rqline_end:
1537 case HTTP_MSG_RQLINE_END:
1538 /* check for HTTP/0.9 request : no version information available.
1539 * msg->sol must point to the first of CR or LF.
1540 */
1541 if (unlikely(msg->sl.rq.v_l == 0))
1542 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1543
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1544 EXPECT_LF_HERE(ptr, http_msg_invalid);
1545 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1546 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1547
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1548 /*
1549 * Common states below
1550 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1551 http_msg_hdr_first:
1552 case HTTP_MSG_HDR_FIRST:
1553 msg->sol = ptr;
1554 if (likely(!HTTP_IS_CRLF(*ptr))) {
1555 goto http_msg_hdr_name;
1556 }
1557
1558 if (likely(*ptr == '\r'))
1559 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1560 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1561
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1562 http_msg_hdr_name:
1563 case HTTP_MSG_HDR_NAME:
1564 /* assumes msg->sol points to the first char */
1565 if (likely(HTTP_IS_TOKEN(*ptr)))
1566 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1567
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1568 if (likely(*ptr == ':')) {
1569 msg->col = ptr - buf->data;
1570 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
1571 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1572
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1573 if (likely(msg->err_pos < -1) || *ptr == '\n')
1574 goto http_msg_invalid;
1575
1576 if (msg->err_pos == -1) /* capture error pointer */
1577 msg->err_pos = ptr - buf->data; /* >= 0 now */
1578
1579 /* and we still accept this non-token character */
1580 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1581
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1582 http_msg_hdr_l1_sp:
1583 case HTTP_MSG_HDR_L1_SP:
1584 /* assumes msg->sol points to the first char and msg->col to the colon */
1585 if (likely(HTTP_IS_SPHT(*ptr)))
1586 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]1587
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1588 /* header value can be basically anything except CR/LF */
1589 msg->sov = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1590
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1591 if (likely(!HTTP_IS_CRLF(*ptr))) {
1592 goto http_msg_hdr_val;
1593 }
1594
1595 if (likely(*ptr == '\r'))
1596 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1597 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1598
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1599 http_msg_hdr_l1_lf:
1600 case HTTP_MSG_HDR_L1_LF:
1601 EXPECT_LF_HERE(ptr, http_msg_invalid);
1602 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]1603
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1604 http_msg_hdr_l1_lws:
1605 case HTTP_MSG_HDR_L1_LWS:
1606 if (likely(HTTP_IS_SPHT(*ptr))) {
1607 /* replace HT,CR,LF with spaces */
1608 for (; buf->data+msg->sov < ptr; msg->sov++)
1609 buf->data[msg->sov] = ' ';
1610 goto http_msg_hdr_l1_sp;
1611 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1612 /* we had a header consisting only in spaces ! */
1613 msg->eol = buf->data + msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1614 goto http_msg_complete_header;
1615
1616 http_msg_hdr_val:
1617 case HTTP_MSG_HDR_VAL:
1618 /* assumes msg->sol points to the first char, msg->col to the
1619 * colon, and msg->sov points to the first character of the
1620 * value.
1621 */
1622 if (likely(!HTTP_IS_CRLF(*ptr)))
1623 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1624
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1625 msg->eol = ptr;
1626 /* Note: we could also copy eol into ->eoh so that we have the
1627 * real header end in case it ends with lots of LWS, but is this
1628 * really needed ?
1629 */
1630 if (likely(*ptr == '\r'))
1631 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1632 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1633
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1634 http_msg_hdr_l2_lf:
1635 case HTTP_MSG_HDR_L2_LF:
1636 EXPECT_LF_HERE(ptr, http_msg_invalid);
1637 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]1638
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1639 http_msg_hdr_l2_lws:
1640 case HTTP_MSG_HDR_L2_LWS:
1641 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1642 /* LWS: replace HT,CR,LF with spaces */
1643 for (; msg->eol < ptr; msg->eol++)
1644 *msg->eol = ' ';
1645 goto http_msg_hdr_val;
1646 }
1647 http_msg_complete_header:
1648 /*
1649 * It was a new header, so the last one is finished.
1650 * Assumes msg->sol points to the first char, msg->col to the
1651 * colon, msg->sov points to the first character of the value
1652 * and msg->eol to the first CR or LF so we know how the line
1653 * ends. We insert last header into the index.
1654 */
1655 /*
1656 fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
1657 write(2, msg->sol, msg->eol-msg->sol);
1658 fprintf(stderr,"\n");
1659 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1660
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1661 if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
1662 idx, idx->tail) < 0))
1663 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1664
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1665 msg->sol = ptr;
1666 if (likely(!HTTP_IS_CRLF(*ptr))) {
1667 goto http_msg_hdr_name;
1668 }
1669
1670 if (likely(*ptr == '\r'))
1671 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1672 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1673
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1674 http_msg_last_lf:
1675 case HTTP_MSG_LAST_LF:
1676 /* Assumes msg->sol points to the first of either CR or LF */
1677 EXPECT_LF_HERE(ptr, http_msg_invalid);
1678 ptr++;
1679 buf->lr = ptr;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1680 msg->col = msg->sov = buf->lr - buf->data;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1681 msg->eoh = msg->sol - buf->data;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1682 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1683 return;
1684#ifdef DEBUG_FULL
1685 default:
1686 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1687 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1688#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1689 }
1690 http_msg_ood:
1691 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1692 msg->msg_state = state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1693 buf->lr = ptr;
1694 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1695
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1696 http_msg_invalid:
1697 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1698 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1699 buf->lr = ptr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1700 return;
1701}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1702
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1703/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1704 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1705 * nothing is done and 1 is returned.
1706 */
1707static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
1708{
1709 int delta;
1710 char *cur_end;
1711
1712 if (msg->sl.rq.v_l != 0)
1713 return 1;
1714
1715 msg->sol = req->data + msg->som;
1716 cur_end = msg->sol + msg->sl.rq.l;
1717 delta = 0;
1718
1719 if (msg->sl.rq.u_l == 0) {
1720 /* if no URI was set, add "/" */
1721 delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
1722 cur_end += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1723 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1724 }
1725 /* add HTTP version */
1726 delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]1727 http_msg_move_end(msg, delta);
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1728 cur_end += delta;
1729 cur_end = (char *)http_parse_reqline(msg, req->data,
1730 HTTP_MSG_RQMETH,
1731 msg->sol, cur_end + 1,
1732 NULL, NULL);
1733 if (unlikely(!cur_end))
1734 return 0;
1735
1736 /* we have a full HTTP/1.0 request now and we know that
1737 * we have either a CR or an LF at <ptr>.
1738 */
1739 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1740 return 1;
1741}
1742
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1743/* Parse the Connection: headaer of an HTTP request, and set the transaction
1744 * flag TX_REQ_CONN_CLO if a "close" mode is expected. The TX_CON_HDR_PARS flag
1745 * is also set so that we don't parse a second time. If some dangerous values
1746 * are encountered, we leave the status to indicate that the request might be
1747 * interpreted as keep-alive, but we also set the connection flags to indicate
1748 * that we WANT it to be a close, so that the header will be fixed. This
1749 * function should only be called when we know we're interested in checking
1750 * the request (not a CONNECT, and FE or BE mangles the header).
1751 */
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]1752void http_req_parse_connection_header(struct http_txn *txn)
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]1753{
1754 struct http_msg *msg = &txn->req;
1755 struct hdr_ctx ctx;
1756 int conn_cl, conn_ka;
1757
1758 if (txn->flags & TX_CON_HDR_PARS)
1759 return;
1760
1761 conn_cl = 0;
1762 conn_ka = 0;
1763 ctx.idx = 0;
1764
1765 while (http_find_header2("Connection", 10, msg->sol, &txn->hdr_idx, &ctx)) {
1766 if (ctx.vlen == 5 && strncasecmp(ctx.line + ctx.val, "close", 5) == 0)
1767 conn_cl = 1;
1768 else if (ctx.vlen == 10 && strncasecmp(ctx.line + ctx.val, "keep-alive", 10) == 0)
1769 conn_ka = 1;
1770 }
1771
1772 /* Determine if the client wishes keep-alive or close.
1773 * RFC2616 #8.1.2 and #14.10 state that HTTP/1.1 and above connections
1774 * are persistent unless "Connection: close" is explicitly specified.
1775 * RFC2616 #19.6.2 refers to RFC2068 for HTTP/1.0 persistent connections.
1776 * RFC2068 #19.7.1 states that HTTP/1.0 clients are not persistent unless
1777 * they explicitly specify "Connection: Keep-Alive", regardless of any
1778 * optional "Keep-Alive" header.
1779 * Note that if we find a request with both "Connection: close" and
1780 * "Connection: Keep-Alive", we indicate we want a close but don't have
1781 * it, so that it can be enforced later.
1782 */
1783
1784 if (txn->flags & TX_REQ_VER_11) { /* HTTP/1.1 */
1785 if (conn_cl) {
1786 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
1787 if (!conn_ka)
1788 txn->flags |= TX_REQ_CONN_CLO;
1789 }
1790 } else { /* HTTP/1.0 */
1791 if (!conn_ka)
1792 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO | TX_REQ_CONN_CLO;
1793 else if (conn_cl)
1794 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
1795 }
1796 txn->flags |= TX_CON_HDR_PARS;
1797}
1798
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1799/* Parse the chunk size at buf->lr. Once done, it adjusts ->lr to point to the
1800 * first byte of body, and increments msg->sov by the number of bytes parsed,
1801 * so that we know we can forward between ->som and ->sov. Note that due to
1802 * possible wrapping at the end of the buffer, it is possible that msg->sov is
1803 * lower than msg->som.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1804 * Return >0 on success, 0 when some data is missing, <0 on error.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1805 * 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]1806 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1807int http_parse_chunk_size(struct buffer *buf, struct http_msg *msg)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1808{
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1809 char *ptr = buf->lr;
1810 char *end = buf->data + buf->size;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1811 unsigned int chunk = 0;
1812
1813 /* The chunk size is in the following form, though we are only
1814 * interested in the size and CRLF :
1815 * 1*HEXDIGIT *WSP *[ ';' extensions ] CRLF
1816 */
1817 while (1) {
1818 int c;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1819 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1820 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1821 c = hex2i(*ptr);
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1822 if (c < 0) /* not a hex digit anymore */
1823 break;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1824 if (++ptr >= end)
1825 ptr = buf->data;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1826 if (chunk & 0xF000000) /* overflow will occur */
1827 return -1;
1828 chunk = (chunk << 4) + c;
1829 }
1830
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1831 /* empty size not allowed */
1832 if (ptr == buf->lr)
1833 return -1;
1834
1835 while (http_is_spht[(unsigned char)*ptr]) {
1836 if (++ptr >= end)
1837 ptr = buf->data;
1838 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1839 return 0;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1840 }
1841
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1842 /* Up to there, we know that at least one byte is present at *ptr. Check
1843 * for the end of chunk size.
1844 */
1845 while (1) {
1846 if (likely(HTTP_IS_CRLF(*ptr))) {
1847 /* we now have a CR or an LF at ptr */
1848 if (likely(*ptr == '\r')) {
1849 if (++ptr >= end)
1850 ptr = buf->data;
1851 if (ptr == buf->r)
1852 return 0;
1853 }
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1854
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1855 if (*ptr != '\n')
1856 return -1;
1857 if (++ptr >= end)
1858 ptr = buf->data;
1859 /* done */
1860 break;
1861 }
1862 else if (*ptr == ';') {
1863 /* chunk extension, ends at next CRLF */
1864 if (++ptr >= end)
1865 ptr = buf->data;
1866 if (ptr == buf->r)
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1867 return 0;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1868
1869 while (!HTTP_IS_CRLF(*ptr)) {
1870 if (++ptr >= end)
1871 ptr = buf->data;
1872 if (ptr == buf->r)
1873 return 0;
1874 }
1875 /* we have a CRLF now, loop above */
1876 continue;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1877 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1878 else
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1879 return -1;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1880 }
1881
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1882 /* OK we found our CRLF and now <ptr> points to the next byte,
1883 * which may or may not be present. We save that into ->lr and
1884 * ->sov.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1885 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1886 msg->sov += ptr - buf->lr;
1887 buf->lr = ptr;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1888 msg->hdr_content_len = chunk;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1889 msg->msg_state = chunk ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]1890 return 1;
1891}
1892
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1893/* This function skips trailers in the buffer <buf> associated with HTTP
1894 * message <msg>. The first visited position is buf->lr. If the end of
1895 * the trailers is found, it is automatically scheduled to be forwarded,
1896 * msg->msg_state switches to HTTP_MSG_DONE, and the function returns >0.
1897 * If not enough data are available, the function does not change anything
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1898 * except maybe buf->lr and msg->sov if it could parse some lines, and returns
1899 * zero. If a parse error is encountered, the function returns < 0 and does not
1900 * change anything except maybe buf->lr and msg->sov. Note that the message
1901 * must already be in HTTP_MSG_TRAILERS state before calling this function,
1902 * which implies that all non-trailers data have already been scheduled for
1903 * forwarding, and that the difference between msg->som and msg->sov exactly
1904 * matches the length of trailers already parsed and not forwarded. It is also
1905 * important to note that this function is designed to be able to parse wrapped
1906 * headers at end of buffer.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1907 */
1908int http_forward_trailers(struct buffer *buf, struct http_msg *msg)
1909{
1910 /* we have buf->lr which points to next line. Look for CRLF. */
1911 while (1) {
1912 char *p1 = NULL, *p2 = NULL;
1913 char *ptr = buf->lr;
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1914 int bytes;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1915
1916 /* scan current line and stop at LF or CRLF */
1917 while (1) {
1918 if (ptr == buf->r)
1919 return 0;
1920
1921 if (*ptr == '\n') {
1922 if (!p1)
1923 p1 = ptr;
1924 p2 = ptr;
1925 break;
1926 }
1927
1928 if (*ptr == '\r') {
1929 if (p1)
1930 return -1;
1931 p1 = ptr;
1932 }
1933
1934 ptr++;
1935 if (ptr >= buf->data + buf->size)
1936 ptr = buf->data;
1937 }
1938
1939 /* after LF; point to beginning of next line */
1940 p2++;
1941 if (p2 >= buf->data + buf->size)
1942 p2 = buf->data;
1943
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1944 bytes = p2 - buf->lr;
1945 if (bytes < 0)
1946 bytes += buf->size;
1947
1948 /* schedule this line for forwarding */
1949 msg->sov += bytes;
1950 if (msg->sov >= buf->size)
1951 msg->sov -= buf->size;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1952
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1953 if (p1 == buf->lr) {
1954 /* LF/CRLF at beginning of line => end of trailers at p2.
1955 * Everything was scheduled for forwarding, there's nothing
1956 * left from this message.
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]1957 */
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]1958 buf->lr = p2;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]1959 msg->msg_state = HTTP_MSG_DONE;
1960 return 1;
1961 }
1962 /* OK, next line then */
1963 buf->lr = p2;
1964 }
1965}
1966
1967/* This function may be called only in HTTP_MSG_DATA_CRLF. It reads the CRLF or
1968 * a possible LF alone at the end of a chunk. It automatically adjusts msg->sov,
1969 * ->som, buf->lr in order to include this part into the next forwarding phase.
1970 * It also sets msg_state to HTTP_MSG_CHUNK_SIZE and returns >0 on success. If
1971 * not enough data are available, the function does not change anything and
1972 * returns zero. If a parse error is encountered, the function returns < 0 and
1973 * does not change anything. Note: this function is designed to parse wrapped
1974 * CRLF at the end of the buffer.
1975 */
1976int http_skip_chunk_crlf(struct buffer *buf, struct http_msg *msg)
1977{
1978 char *ptr;
1979 int bytes;
1980
1981 /* NB: we'll check data availabilty at the end. It's not a
1982 * problem because whatever we match first will be checked
1983 * against the correct length.
1984 */
1985 bytes = 1;
1986 ptr = buf->lr;
1987 if (*ptr == '\r') {
1988 bytes++;
1989 ptr++;
1990 if (ptr >= buf->data + buf->size)
1991 ptr = buf->data;
1992 }
1993
1994 if (buf->l < bytes)
1995 return 0;
1996
1997 if (*ptr != '\n')
1998 return -1;
1999
2000 ptr++;
2001 if (ptr >= buf->data + buf->size)
2002 ptr = buf->data;
2003 buf->lr = ptr;
2004 /* prepare the CRLF to be forwarded. msg->som may be before data but we don't care */
2005 msg->sov = ptr - buf->data;
2006 msg->som = msg->sov - bytes;
2007 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
2008 return 1;
2009}
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2010
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2011void http_buffer_heavy_realign(struct buffer *buf, struct http_msg *msg)
2012{
2013 char *end = buf->data + buf->size;
2014 int off = buf->data + buf->size - buf->w;
2015
2016 /* two possible cases :
2017 * - the buffer is in one contiguous block, we move it in-place
2018 * - the buffer is in two blocks, we move it via the trash
2019 */
2020 if (buf->l) {
2021 int block1 = buf->l;
2022 int block2 = 0;
2023 if (buf->r <= buf->w) {
2024 /* non-contiguous block */
2025 block1 = buf->data + buf->size - buf->w;
2026 block2 = buf->r - buf->data;
2027 }
2028 if (block2)
2029 memcpy(trash, buf->data, block2);
2030 memmove(buf->data, buf->w, block1);
2031 if (block2)
2032 memcpy(buf->data + block1, trash, block2);
2033 }
2034
2035 /* adjust all known pointers */
2036 buf->w = buf->data;
2037 buf->lr += off; if (buf->lr >= end) buf->lr -= buf->size;
2038 buf->r += off; if (buf->r >= end) buf->r -= buf->size;
2039 msg->sol += off; if (msg->sol >= end) msg->sol -= buf->size;
2040 msg->eol += off; if (msg->eol >= end) msg->eol -= buf->size;
2041
2042 /* adjust relative pointers */
2043 msg->som = 0;
2044 msg->eoh += off; if (msg->eoh >= buf->size) msg->eoh -= buf->size;
2045 msg->col += off; if (msg->col >= buf->size) msg->col -= buf->size;
2046 msg->sov += off; if (msg->sov >= buf->size) msg->sov -= buf->size;
2047
2048 msg->sl.rq.u += off; if (msg->sl.rq.u >= buf->size) msg->sl.rq.u -= buf->size;
2049 msg->sl.rq.v += off; if (msg->sl.rq.v >= buf->size) msg->sl.rq.v -= buf->size;
2050
2051 if (msg->err_pos >= 0) {
2052 msg->err_pos += off;
2053 if (msg->err_pos >= buf->size)
2054 msg->err_pos -= buf->size;
2055 }
2056
2057 buf->flags &= ~BF_FULL;
2058 if (buf->l >= buffer_max_len(buf))
2059 buf->flags |= BF_FULL;
2060}
2061
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2062/* This stream analyser waits for a complete HTTP request. It returns 1 if the
2063 * processing can continue on next analysers, or zero if it either needs more
2064 * data or wants to immediately abort the request (eg: timeout, error, ...). It
2065 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
2066 * when it has nothing left to do, and may remove any analyser when it wants to
2067 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2068 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2069int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2070{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2071 /*
2072 * We will parse the partial (or complete) lines.
2073 * We will check the request syntax, and also join multi-line
2074 * headers. An index of all the lines will be elaborated while
2075 * parsing.
2076 *
2077 * For the parsing, we use a 28 states FSM.
2078 *
2079 * Here is the information we currently have :
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2080 * req->data + msg->som = beginning of request
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2081 * req->data + msg->eoh = end of processed headers / start of current one
2082 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2083 * req->lr = first non-visited byte
2084 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2085 *
2086 * At end of parsing, we may perform a capture of the error (if any), and
2087 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
2088 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
2089 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2090 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2091
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2092 int cur_idx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2093 int use_close_only;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2094 struct http_txn *txn = &s->txn;
2095 struct http_msg *msg = &txn->req;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2096 struct hdr_ctx ctx;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]2097
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]2098 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2099 now_ms, __FUNCTION__,
2100 s,
2101 req,
2102 req->rex, req->wex,
2103 req->flags,
2104 req->l,
2105 req->analysers);
2106
Willy Tarreau52a0c602009-08-16 22:45:38 +0200[diff] [blame]2107 /* we're speaking HTTP here, so let's speak HTTP to the client */
2108 s->srv_error = http_return_srv_error;
2109
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2110 /* There's a protected area at the end of the buffer for rewriting
2111 * purposes. We don't want to start to parse the request if the
2112 * protected area is affected, because we may have to move processed
2113 * data later, which is much more complicated.
2114 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2115 if (req->l && msg->msg_state < HTTP_MSG_ERROR) {
2116 if (unlikely((req->flags & BF_FULL) ||
2117 req->r < req->lr ||
2118 req->r > req->data + req->size - global.tune.maxrewrite)) {
2119 if (req->send_max) {
2120 /* some data has still not left the buffer, wake us once that's done */
2121 buffer_dont_connect(req);
2122 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
2123 return 0;
2124 }
2125 if (req->l <= req->size - global.tune.maxrewrite)
2126 http_buffer_heavy_realign(req, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2127 }
2128
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]2129 if (likely(req->lr < req->r))
2130 http_msg_analyzer(req, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]2131 }
2132
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2133 /* 1: we might have to print this header in debug mode */
2134 if (unlikely((global.mode & MODE_DEBUG) &&
2135 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2136 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2137 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2138
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2139 sol = req->data + msg->som;
2140 eol = sol + msg->sl.rq.l;
2141 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2142
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2143 sol += hdr_idx_first_pos(&txn->hdr_idx);
2144 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2145
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2146 while (cur_idx) {
2147 eol = sol + txn->hdr_idx.v[cur_idx].len;
2148 debug_hdr("clihdr", s, sol, eol);
2149 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2150 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2151 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2152 }
2153
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2154
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2155 /*
2156 * Now we quickly check if we have found a full valid request.
2157 * If not so, we check the FD and buffer states before leaving.
2158 * A full request is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2159 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2160 * requests are checked first.
2161 *
2162 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2163
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2164 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2165 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2166 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2167 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2168 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
2169 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2170
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2171 /* 1: Since we are in header mode, if there's no space
2172 * left for headers, we won't be able to free more
2173 * later, so the session will never terminate. We
2174 * must terminate it now.
2175 */
2176 if (unlikely(req->flags & BF_FULL)) {
2177 /* FIXME: check if URI is set and return Status
2178 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2179 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2180 goto return_bad_req;
2181 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2182
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2183 /* 2: have we encountered a read error ? */
2184 else if (req->flags & BF_READ_ERROR) {
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2185 if (txn->flags & TX_NOT_FIRST)
2186 goto failed_keep_alive;
2187
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2188 /* we cannot return any message on error */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2189 if (msg->err_pos >= 0)
2190 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2191 msg->msg_state = HTTP_MSG_ERROR;
2192 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2193
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2194 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2195 if (s->listener->counters)
2196 s->listener->counters->failed_req++;
2197
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2198 if (!(s->flags & SN_ERR_MASK))
2199 s->flags |= SN_ERR_CLICL;
2200 if (!(s->flags & SN_FINST_MASK))
2201 s->flags |= SN_FINST_R;
2202 return 0;
2203 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2204
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2205 /* 3: has the read timeout expired ? */
2206 else if (req->flags & BF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2207 if (txn->flags & TX_NOT_FIRST)
2208 goto failed_keep_alive;
2209
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2210 /* read timeout : give up with an error message. */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2211 if (msg->err_pos >= 0)
2212 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2213 txn->status = 408;
2214 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
2215 msg->msg_state = HTTP_MSG_ERROR;
2216 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2217
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2218 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2219 if (s->listener->counters)
2220 s->listener->counters->failed_req++;
2221
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2222 if (!(s->flags & SN_ERR_MASK))
2223 s->flags |= SN_ERR_CLITO;
2224 if (!(s->flags & SN_FINST_MASK))
2225 s->flags |= SN_FINST_R;
2226 return 0;
2227 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2228
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2229 /* 4: have we encountered a close ? */
2230 else if (req->flags & BF_SHUTR) {
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2231 if (txn->flags & TX_NOT_FIRST)
2232 goto failed_keep_alive;
2233
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2234 if (msg->err_pos >= 0)
2235 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2236 txn->status = 400;
2237 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2238 msg->msg_state = HTTP_MSG_ERROR;
2239 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2240
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2241 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2242 if (s->listener->counters)
2243 s->listener->counters->failed_req++;
2244
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2245 if (!(s->flags & SN_ERR_MASK))
2246 s->flags |= SN_ERR_CLICL;
2247 if (!(s->flags & SN_FINST_MASK))
2248 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2249 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2250 }
2251
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2252 buffer_dont_connect(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2253 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
Willy Tarreau5e8949c2010-01-03 14:38:03 +0100[diff] [blame^]2254 req->flags &= ~BF_DONT_READ;
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]2255
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2256 /* just set the request timeout once at the beginning of the request */
2257 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]2258 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2259
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2260 /* we're not ready yet */
2261 return 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2262
2263 failed_keep_alive:
2264 /* Here we process low-level errors for keep-alive requests. In
2265 * short, if the request is not the first one and it experiences
2266 * a timeout, read error or shutdown, we just silently close so
2267 * that the client can try again.
2268 */
2269 txn->status = 0;
2270 msg->msg_state = HTTP_MSG_RQBEFORE;
2271 req->analysers = 0;
2272 s->logs.logwait = 0;
2273 stream_int_cond_close(req->prod, NULL);
2274 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2275 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2276
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2277 /* OK now we have a complete HTTP request with indexed headers. Let's
2278 * complete the request parsing by setting a few fields we will need
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]2279 * later. At this point, we have the last CRLF at req->data + msg->eoh.
2280 * If the request is in HTTP/0.9 form, the rule is still true, and eoh
2281 * points to the CRLF of the request line. req->lr points to the first
2282 * byte after the last LF. msg->col and msg->sov point to the first
2283 * byte of data. msg->eol cannot be trusted because it may have been
2284 * left uninitialized (for instance in the absence of headers).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2285 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]2286
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2287 /* Maybe we found in invalid header name while we were configured not
2288 * to block on that, so we have to capture it now.
2289 */
2290 if (unlikely(msg->err_pos >= 0))
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2291 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2292
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2293 /* ensure we keep this pointer to the beginning of the message */
2294 msg->sol = req->data + msg->som;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2295
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2296 /*
2297 * 1: identify the method
2298 */
2299 txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
2300
2301 /* we can make use of server redirect on GET and HEAD */
2302 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
2303 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2304
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2305 /*
2306 * 2: check if the URI matches the monitor_uri.
2307 * We have to do this for every request which gets in, because
2308 * the monitor-uri is defined by the frontend.
2309 */
2310 if (unlikely((s->fe->monitor_uri_len != 0) &&
2311 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
2312 !memcmp(&req->data[msg->sl.rq.u],
2313 s->fe->monitor_uri,
2314 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2315 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2316 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2317 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2318 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2319
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2320 s->flags |= SN_MONITOR;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2321
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2322 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2323 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
2324 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2325
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2326 ret = acl_pass(ret);
2327 if (cond->pol == ACL_COND_UNLESS)
2328 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2329
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2330 if (ret) {
2331 /* we fail this request, let's return 503 service unavail */
2332 txn->status = 503;
2333 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
2334 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]2335 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2336 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]2337
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2338 /* nothing to fail, let's reply normaly */
2339 txn->status = 200;
2340 stream_int_retnclose(req->prod, &http_200_chunk);
2341 goto return_prx_cond;
2342 }
2343
2344 /*
2345 * 3: Maybe we have to copy the original REQURI for the logs ?
2346 * Note: we cannot log anymore if the request has been
2347 * classified as invalid.
2348 */
2349 if (unlikely(s->logs.logwait & LW_REQ)) {
2350 /* we have a complete HTTP request that we must log */
2351 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
2352 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2353
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2354 if (urilen >= REQURI_LEN)
2355 urilen = REQURI_LEN - 1;
2356 memcpy(txn->uri, &req->data[msg->som], urilen);
2357 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2358
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2359 if (!(s->logs.logwait &= ~LW_REQ))
2360 s->do_log(s);
2361 } else {
2362 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2363 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2364 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2365
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2366 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]2367 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
2368 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2369
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2370 /* ... and check if the request is HTTP/1.1 or above */
2371 if ((msg->sl.rq.v_l == 8) &&
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]2372 ((req->data[msg->sl.rq.v + 5] > '1') ||
2373 ((req->data[msg->sl.rq.v + 5] == '1') &&
2374 (req->data[msg->sl.rq.v + 7] >= '1'))))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2375 txn->flags |= TX_REQ_VER_11;
2376
2377 /* "connection" has not been parsed yet */
2378 txn->flags &= ~TX_CON_HDR_PARS;
2379
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2380 /* transfer length unknown*/
2381 txn->flags &= ~TX_REQ_XFER_LEN;
2382
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2383 /* 5: we may need to capture headers */
2384 if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
2385 capture_headers(req->data + msg->som, &txn->hdr_idx,
2386 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2387
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2388 /* 6: determine the transfer-length.
2389 * According to RFC2616 #4.4, amended by the HTTPbis working group,
2390 * the presence of a message-body in a REQUEST and its transfer length
2391 * must be determined that way (in order of precedence) :
2392 * 1. The presence of a message-body in a request is signaled by the
2393 * inclusion of a Content-Length or Transfer-Encoding header field
2394 * in the request's header fields. When a request message contains
2395 * both a message-body of non-zero length and a method that does
2396 * not define any semantics for that request message-body, then an
2397 * origin server SHOULD either ignore the message-body or respond
2398 * with an appropriate error message (e.g., 413). A proxy or
2399 * gateway, when presented the same request, SHOULD either forward
2400 * the request inbound with the message- body or ignore the
2401 * message-body when determining a response.
2402 *
2403 * 2. If a Transfer-Encoding header field (Section 9.7) is present
2404 * and the "chunked" transfer-coding (Section 6.2) is used, the
2405 * transfer-length is defined by the use of this transfer-coding.
2406 * If a Transfer-Encoding header field is present and the "chunked"
2407 * transfer-coding is not present, the transfer-length is defined
2408 * by the sender closing the connection.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2409 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2410 * 3. If a Content-Length header field is present, its decimal value in
2411 * OCTETs represents both the entity-length and the transfer-length.
2412 * If a message is received with both a Transfer-Encoding header
2413 * field and a Content-Length header field, the latter MUST be ignored.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2414 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2415 * 4. By the server closing the connection. (Closing the connection
2416 * cannot be used to indicate the end of a request body, since that
2417 * would leave no possibility for the server to send back a response.)
2418 *
2419 * Whenever a transfer-coding is applied to a message-body, the set of
2420 * transfer-codings MUST include "chunked", unless the message indicates
2421 * it is terminated by closing the connection. When the "chunked"
2422 * transfer-coding is used, it MUST be the last transfer-coding applied
2423 * to the message-body.
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2424 */
2425
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2426 /* CONNECT sets a tunnel and ignores everything else */
2427 if (txn->meth == HTTP_METH_CONNECT)
2428 goto skip_xfer_len;
2429
2430 use_close_only = 0;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2431 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2432 /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]2433 while ((txn->flags & TX_REQ_VER_11) &&
2434 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2435 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
2436 txn->flags |= (TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2437 else if (txn->flags & TX_REQ_TE_CHNK) {
2438 /* bad transfer-encoding (chunked followed by something else) */
2439 use_close_only = 1;
2440 txn->flags &= ~(TX_REQ_TE_CHNK | TX_REQ_XFER_LEN);
2441 break;
2442 }
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2443 }
2444
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2445 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2446 while (!(txn->flags & TX_REQ_TE_CHNK) && !use_close_only &&
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2447 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
2448 signed long long cl;
2449
2450 if (!ctx.vlen)
2451 goto return_bad_req;
2452
2453 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
2454 goto return_bad_req; /* parse failure */
2455
2456 if (cl < 0)
2457 goto return_bad_req;
2458
2459 if ((txn->flags & TX_REQ_CNT_LEN) && (msg->hdr_content_len != cl))
2460 goto return_bad_req; /* already specified, was different */
2461
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2462 txn->flags |= TX_REQ_CNT_LEN | TX_REQ_XFER_LEN;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2463 msg->hdr_content_len = cl;
2464 }
2465
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2466 /* bodyless requests have a known length */
2467 if (!use_close_only)
2468 txn->flags |= TX_REQ_XFER_LEN;
2469
2470 skip_xfer_len:
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2471 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2472 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2473 req->analyse_exp = TICK_ETERNITY;
2474 return 1;
2475
2476 return_bad_req:
2477 /* We centralize bad requests processing here */
2478 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2479 /* we detected a parsing error. We want to archive this request
2480 * in the dedicated proxy area for later troubleshooting.
2481 */
2482 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2483 }
2484
2485 txn->req.msg_state = HTTP_MSG_ERROR;
2486 txn->status = 400;
2487 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2488
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2489 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2490 if (s->listener->counters)
2491 s->listener->counters->failed_req++;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2492
2493 return_prx_cond:
2494 if (!(s->flags & SN_ERR_MASK))
2495 s->flags |= SN_ERR_PRXCOND;
2496 if (!(s->flags & SN_FINST_MASK))
2497 s->flags |= SN_FINST_R;
2498
2499 req->analysers = 0;
2500 req->analyse_exp = TICK_ETERNITY;
2501 return 0;
2502}
2503
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2504/* This stream analyser runs all HTTP request processing which is common to
2505 * frontends and backends, which means blocking ACLs, filters, connection-close,
2506 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2507 * 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]2508 * either needs more data or wants to immediately abort the request (eg: deny,
2509 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2510 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2511int 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]2512{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2513 struct http_txn *txn = &s->txn;
2514 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2515 struct acl_cond *cond;
2516 struct redirect_rule *rule;
2517 int cur_idx;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2518
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2519 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2520 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2521 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2522 return 0;
2523 }
2524
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2525 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2526 req->analyse_exp = TICK_ETERNITY;
2527
2528 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2529 now_ms, __FUNCTION__,
2530 s,
2531 req,
2532 req->rex, req->wex,
2533 req->flags,
2534 req->l,
2535 req->analysers);
2536
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2537 /* first check whether we have some ACLs set to block this request */
2538 list_for_each_entry(cond, &px->block_cond, list) {
2539 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]2540
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2541 ret = acl_pass(ret);
2542 if (cond->pol == ACL_COND_UNLESS)
2543 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]2544
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2545 if (ret) {
2546 txn->status = 403;
2547 /* let's log the request time */
2548 s->logs.tv_request = now;
2549 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2550 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2551 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2552 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2553
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2554 /* try headers filters */
2555 if (px->req_exp != NULL) {
2556 if (apply_filters_to_request(s, req, px->req_exp) < 0)
2557 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2558
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2559 /* has the request been denied ? */
2560 if (txn->flags & TX_CLDENY) {
2561 /* no need to go further */
2562 txn->status = 403;
2563 /* let's log the request time */
2564 s->logs.tv_request = now;
2565 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2566 goto return_prx_cond;
2567 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2568
2569 /* When a connection is tarpitted, we use the tarpit timeout,
2570 * which may be the same as the connect timeout if unspecified.
2571 * If unset, then set it to zero because we really want it to
2572 * eventually expire. We build the tarpit as an analyser.
2573 */
2574 if (txn->flags & TX_CLTARPIT) {
2575 buffer_erase(s->req);
2576 /* wipe the request out so that we can drop the connection early
2577 * if the client closes first.
2578 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2579 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2580 req->analysers = 0; /* remove switching rules etc... */
2581 req->analysers |= AN_REQ_HTTP_TARPIT;
2582 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
2583 if (!req->analyse_exp)
2584 req->analyse_exp = tick_add(now_ms, 0);
2585 return 1;
2586 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2587 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2588
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2589 /* Until set to anything else, the connection mode is set as TUNNEL. It will
2590 * only change if both the request and the config reference something else.
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2591 */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2592
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2593 if ((txn->meth != HTTP_METH_CONNECT) &&
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2594 ((s->fe->options|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]2595 int tmp = TX_CON_WANT_TUN;
2596 if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE)
2597 tmp = TX_CON_WANT_KAL;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]2598 if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO)
2599 tmp = TX_CON_WANT_SCL;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2600 if ((s->fe->options|s->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))
2601 tmp = TX_CON_WANT_CLO;
2602
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2603 if (!(txn->flags & TX_REQ_XFER_LEN))
2604 tmp = TX_CON_WANT_CLO;
2605
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2606 if (!(txn->flags & TX_CON_HDR_PARS))
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]2607 http_req_parse_connection_header(txn);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2608
2609 if ((txn->flags & TX_CON_WANT_MSK) < tmp)
2610 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
2611 }
2612
2613 /* We're really certain of the connection mode (tunnel, close, keep-alive)
2614 * once we know the backend, because the tunnel mode can be implied by the
2615 * lack of any close/keepalive options in both the FE and the BE. Since
2616 * this information can evolve with time, we proceed by trying to make the
2617 * header status match the desired status. For this, we'll have to adjust
2618 * the "Connection" header. The test for persistent connections has already
2619 * been performed, so we only enter here if there is a risk the connection
2620 * is considered as persistent and we want it to be closed on the server
2621 * side. It would be nice if we could enter this place only when a
2622 * Connection header exists. Note that a CONNECT method will not enter
2623 * here.
2624 */
2625 if (!(txn->flags & TX_REQ_CONN_CLO) && ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL)) {
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2626 char *cur_ptr, *cur_end, *cur_next;
2627 int old_idx, delta, val;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2628 int must_delete;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2629 struct hdr_idx_elem *cur_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2630
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2631 must_delete = !(txn->flags & TX_REQ_VER_11);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2632 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2633
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2634 for (old_idx = 0; (cur_idx = txn->hdr_idx.v[old_idx].next); old_idx = cur_idx) {
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2635 cur_hdr = &txn->hdr_idx.v[cur_idx];
2636 cur_ptr = cur_next;
2637 cur_end = cur_ptr + cur_hdr->len;
2638 cur_next = cur_end + cur_hdr->cr + 1;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2639
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2640 val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2641 if (!val)
2642 continue;
2643
2644 /* 3 possibilities :
2645 * - we have already set "Connection: close" or we're in
2646 * HTTP/1.0, so we remove this line.
2647 * - we have not yet set "Connection: close", but this line
2648 * indicates close. We leave it untouched and set the flag.
2649 * - we have not yet set "Connection: close", and this line
2650 * indicates non-close. We replace it and set the flag.
2651 */
2652 if (must_delete) {
2653 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
2654 http_msg_move_end(&txn->req, delta);
2655 cur_next += delta;
2656 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
2657 txn->hdr_idx.used--;
2658 cur_hdr->len = 0;
2659 txn->flags |= TX_REQ_CONN_CLO;
2660 } else {
2661 if (cur_end - cur_ptr - val != 5 ||
2662 strncasecmp(cur_ptr + val, "close", 5) != 0) {
2663 delta = buffer_replace2(req, cur_ptr + val, cur_end,
2664 "close", 5);
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2665 cur_next += delta;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2666 cur_hdr->len += delta;
2667 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2668 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2669 txn->flags |= TX_REQ_CONN_CLO;
2670 must_delete = 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2671 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2672 } /* for loop */
2673 } /* if must close keep-alive */
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2674
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2675 /* add request headers from the rule sets in the same order */
2676 for (cur_idx = 0; cur_idx < px->nb_reqadd; cur_idx++) {
2677 if (unlikely(http_header_add_tail(req,
2678 &txn->req,
2679 &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]2680 px->req_add[cur_idx]) < 0))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2681 goto return_bad_req;
2682 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]2683
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2684 /* check if stats URI was requested, and if an auth is needed */
2685 if (px->uri_auth != NULL &&
2686 (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)) {
2687 /* we have to check the URI and auth for this request.
2688 * FIXME!!! that one is rather dangerous, we want to
2689 * make it follow standard rules (eg: clear req->analysers).
2690 */
2691 if (stats_check_uri_auth(s, px)) {
2692 req->analysers = 0;
2693 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2694 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2695 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]2696
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2697 /* check whether we have some ACLs set to redirect this request */
2698 list_for_each_entry(rule, &px->redirect_rules, list) {
2699 int ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2700
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2701 ret = acl_pass(ret);
2702 if (rule->cond->pol == ACL_COND_UNLESS)
2703 ret = !ret;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2704
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2705 if (ret) {
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]2706 struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 };
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2707 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2708
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2709 /* build redirect message */
2710 switch(rule->code) {
2711 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2712 msg_fmt = HTTP_303;
2713 break;
2714 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2715 msg_fmt = HTTP_301;
2716 break;
2717 case 302:
2718 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2719 msg_fmt = HTTP_302;
2720 break;
2721 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2722
Willy Tarreau3bb9c232010-01-03 12:24:37 +0100[diff] [blame]2723 if (unlikely(!chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2724 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2725
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2726 switch(rule->type) {
2727 case REDIRECT_TYPE_PREFIX: {
2728 const char *path;
2729 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2730
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2731 path = http_get_path(txn);
2732 /* build message using path */
2733 if (path) {
Willy Tarreaua95a1f42010-01-03 13:04:35 +0100[diff] [blame]2734 pathlen = txn->req.sl.rq.u_l + (txn->req.sol-txn->req.som+txn->req.sl.rq.u) - path;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2735 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2736 int qs = 0;
2737 while (qs < pathlen) {
2738 if (path[qs] == '?') {
2739 pathlen = qs;
2740 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2741 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2742 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2743 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2744 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2745 } else {
2746 path = "/";
2747 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2748 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2749
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]2750 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2751 goto return_bad_req;
2752
2753 /* add prefix. Note that if prefix == "/", we don't want to
2754 * add anything, otherwise it makes it hard for the user to
2755 * configure a self-redirection.
2756 */
2757 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2758 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
2759 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2760 }
2761
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2762 /* add path */
2763 memcpy(rdr.str + rdr.len, path, pathlen);
2764 rdr.len += pathlen;
2765 break;
2766 }
2767 case REDIRECT_TYPE_LOCATION:
2768 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]2769 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2770 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2771
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2772 /* add location */
2773 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
2774 rdr.len += rule->rdr_len;
2775 break;
2776 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2777
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2778 if (rule->cookie_len) {
2779 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
2780 rdr.len += 14;
2781 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
2782 rdr.len += rule->cookie_len;
2783 memcpy(rdr.str + rdr.len, "\r\n", 2);
2784 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2785 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2786
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2787 /* add end of headers */
2788 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
2789 rdr.len += 4;
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2790
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2791 txn->status = rule->code;
2792 /* let's log the request time */
2793 s->logs.tv_request = now;
2794 stream_int_retnclose(req->prod, &rdr);
2795 goto return_prx_cond;
2796 }
2797 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2798
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2799 /* We can shut read side if we know how we won't transfer any more data && !abort_on_close */
2800 if ((txn->flags & TX_REQ_XFER_LEN) &&
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]2801 !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.hdr_content_len &&
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]2802 (req->cons->state == SI_ST_EST || !(s->be->options & PR_O_ABRT_CLOSE)))
Willy Tarreau349a0f62009-10-18 21:17:42 +0200[diff] [blame]2803 req->flags |= BF_DONT_READ;
Willy Tarreau5e8949c2010-01-03 14:38:03 +0100[diff] [blame^]2804 else
2805 req->flags &= ~BF_DONT_READ;
Willy Tarreauf1ba4b32009-10-17 14:37:52 +0200[diff] [blame]2806
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2807 /* that's OK for us now, let's move on to next analysers */
2808 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2809
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2810 return_bad_req:
2811 /* We centralize bad requests processing here */
2812 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2813 /* we detected a parsing error. We want to archive this request
2814 * in the dedicated proxy area for later troubleshooting.
2815 */
2816 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2817 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2818
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2819 txn->req.msg_state = HTTP_MSG_ERROR;
2820 txn->status = 400;
2821 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2822
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2823 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2824 if (s->listener->counters)
2825 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]2826
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2827 return_prx_cond:
2828 if (!(s->flags & SN_ERR_MASK))
2829 s->flags |= SN_ERR_PRXCOND;
2830 if (!(s->flags & SN_FINST_MASK))
2831 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]2832
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2833 req->analysers = 0;
2834 req->analyse_exp = TICK_ETERNITY;
2835 return 0;
2836}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2837
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2838/* This function performs all the processing enabled for the current request.
2839 * It returns 1 if the processing can continue on next analysers, or zero if it
2840 * needs more data, encounters an error, or wants to immediately abort the
2841 * request. It relies on buffers flags, and updates s->req->analysers.
2842 */
2843int http_process_request(struct session *s, struct buffer *req, int an_bit)
2844{
2845 struct http_txn *txn = &s->txn;
2846 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2847
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]2848 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2849 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2850 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2851 return 0;
2852 }
2853
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2854 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2855 now_ms, __FUNCTION__,
2856 s,
2857 req,
2858 req->rex, req->wex,
2859 req->flags,
2860 req->l,
2861 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2862
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2863 /*
2864 * Right now, we know that we have processed the entire headers
2865 * and that unwanted requests have been filtered out. We can do
2866 * whatever we want with the remaining request. Also, now we
2867 * may have separate values for ->fe, ->be.
2868 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2869
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2870 /*
2871 * If HTTP PROXY is set we simply get remote server address
2872 * parsing incoming request.
2873 */
2874 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
2875 url2sa(req->data + msg->sl.rq.u, msg->sl.rq.u_l, &s->srv_addr);
2876 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2877
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2878 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]2879 * 7: Now we can work with the cookies.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2880 * Note that doing so might move headers in the request, but
2881 * the fields will stay coherent and the URI will not move.
2882 * This should only be performed in the backend.
2883 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]2884 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2885 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
2886 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]2887
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2888 /*
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]2889 * 8: the appsession cookie was looked up very early in 1.2,
2890 * so let's do the same now.
2891 */
2892
2893 /* It needs to look into the URI */
2894 if ((s->sessid == NULL) && s->be->appsession_name) {
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]2895 get_srv_from_appsession(s, &req->data[msg->sl.rq.u], msg->sl.rq.u_l);
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]2896 }
2897
2898 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2899 * 9: add X-Forwarded-For if either the frontend or the backend
2900 * asks for it.
2901 */
2902 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
2903 if (s->cli_addr.ss_family == AF_INET) {
2904 /* Add an X-Forwarded-For header unless the source IP is
2905 * in the 'except' network range.
2906 */
2907 if ((!s->fe->except_mask.s_addr ||
2908 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr)
2909 != s->fe->except_net.s_addr) &&
2910 (!s->be->except_mask.s_addr ||
2911 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr)
2912 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]2913 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2914 unsigned char *pn;
2915 pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]2916
2917 /* Note: we rely on the backend to get the header name to be used for
2918 * x-forwarded-for, because the header is really meant for the backends.
2919 * However, if the backend did not specify any option, we have to rely
2920 * on the frontend's header name.
2921 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2922 if (s->be->fwdfor_hdr_len) {
2923 len = s->be->fwdfor_hdr_len;
2924 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]2925 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2926 len = s->fe->fwdfor_hdr_len;
2927 memcpy(trash, s->fe->fwdfor_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]2928 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2929 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]2930
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]2931 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]2932 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2933 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]2934 }
2935 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2936 else if (s->cli_addr.ss_family == AF_INET6) {
2937 /* FIXME: for the sake of completeness, we should also support
2938 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2939 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2940 int len;
2941 char pn[INET6_ADDRSTRLEN];
2942 inet_ntop(AF_INET6,
2943 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
2944 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2945
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2946 /* Note: we rely on the backend to get the header name to be used for
2947 * x-forwarded-for, because the header is really meant for the backends.
2948 * However, if the backend did not specify any option, we have to rely
2949 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2950 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2951 if (s->be->fwdfor_hdr_len) {
2952 len = s->be->fwdfor_hdr_len;
2953 memcpy(trash, s->be->fwdfor_hdr_name, len);
2954 } else {
2955 len = s->fe->fwdfor_hdr_len;
2956 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2957 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2958 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2959
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2960 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]2961 &txn->hdr_idx, trash, len) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2962 goto return_bad_req;
2963 }
2964 }
2965
2966 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]2967 * 10: add X-Original-To if either the frontend or the backend
2968 * asks for it.
2969 */
2970 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
2971
2972 /* FIXME: don't know if IPv6 can handle that case too. */
2973 if (s->cli_addr.ss_family == AF_INET) {
2974 /* Add an X-Original-To header unless the destination IP is
2975 * in the 'except' network range.
2976 */
2977 if (!(s->flags & SN_FRT_ADDR_SET))
2978 get_frt_addr(s);
2979
2980 if ((!s->fe->except_mask_to.s_addr ||
2981 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
2982 != s->fe->except_to.s_addr) &&
2983 (!s->be->except_mask_to.s_addr ||
2984 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
2985 != s->be->except_to.s_addr)) {
2986 int len;
2987 unsigned char *pn;
2988 pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr;
2989
2990 /* Note: we rely on the backend to get the header name to be used for
2991 * x-original-to, because the header is really meant for the backends.
2992 * However, if the backend did not specify any option, we have to rely
2993 * on the frontend's header name.
2994 */
2995 if (s->be->orgto_hdr_len) {
2996 len = s->be->orgto_hdr_len;
2997 memcpy(trash, s->be->orgto_hdr_name, len);
2998 } else {
2999 len = s->fe->orgto_hdr_len;
3000 memcpy(trash, s->fe->orgto_hdr_name, len);
Willy Tarreaub86db342009-11-30 11:50:16 +0100[diff] [blame]3001 }
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3002 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
3003
3004 if (unlikely(http_header_add_tail2(req, &txn->req,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3005 &txn->hdr_idx, trash, len) < 0))
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]3006 goto return_bad_req;
3007 }
3008 }
3009 }
3010
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]3011 /* 11: add "Connection: close" if needed and not yet set. */
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3012 if (!(txn->flags & TX_REQ_CONN_CLO) && ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL)) {
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]3013 if (unlikely(http_header_add_tail2(req, &txn->req, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]3014 "Connection: close", 17) < 0))
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3015 goto return_bad_req;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3016 txn->flags |= TX_REQ_CONN_CLO;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3017 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3018
3019 /* If we have no server assigned yet and we're balancing on url_param
3020 * with a POST request, we may be interested in checking the body for
3021 * that parameter. This will be done in another analyser.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3022 */
3023 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
3024 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3025 s->be->url_param_post_limit != 0 &&
3026 (txn->flags & (TX_REQ_CNT_LEN|TX_REQ_TE_CHNK)) &&
Willy Tarreau1d3bcce2009-12-27 15:50:06 +0100[diff] [blame]3027 memchr(req->data + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3028 buffer_dont_connect(req);
3029 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3030 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3031
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3032 if (txn->flags & TX_REQ_XFER_LEN)
3033 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]3034
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3035 /*************************************************************
3036 * OK, that's finished for the headers. We have done what we *
3037 * could. Let's switch to the DATA state. *
3038 ************************************************************/
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3039 req->analyse_exp = TICK_ETERNITY;
3040 req->analysers &= ~an_bit;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3041
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3042 s->logs.tv_request = now;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3043 /* OK let's go on with the BODY now */
3044 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]3045
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3046 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3047 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3048 /* we detected a parsing error. We want to archive this request
3049 * in the dedicated proxy area for later troubleshooting.
3050 */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3051 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]3052 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3053
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3054 txn->req.msg_state = HTTP_MSG_ERROR;
3055 txn->status = 400;
3056 req->analysers = 0;
3057 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3058
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3059 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3060 if (s->listener->counters)
3061 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3062
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]3063 if (!(s->flags & SN_ERR_MASK))
3064 s->flags |= SN_ERR_PRXCOND;
3065 if (!(s->flags & SN_FINST_MASK))
3066 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3067 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3068}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3069
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3070/* This function is an analyser which processes the HTTP tarpit. It always
3071 * returns zero, at the beginning because it prevents any other processing
3072 * from occurring, and at the end because it terminates the request.
3073 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3074int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3075{
3076 struct http_txn *txn = &s->txn;
3077
3078 /* This connection is being tarpitted. The CLIENT side has
3079 * already set the connect expiration date to the right
3080 * timeout. We just have to check that the client is still
3081 * there and that the timeout has not expired.
3082 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3083 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3084 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
3085 !tick_is_expired(req->analyse_exp, now_ms))
3086 return 0;
3087
3088 /* We will set the queue timer to the time spent, just for
3089 * logging purposes. We fake a 500 server error, so that the
3090 * attacker will not suspect his connection has been tarpitted.
3091 * It will not cause trouble to the logs because we can exclude
3092 * the tarpitted connections by filtering on the 'PT' status flags.
3093 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3094 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
3095
3096 txn->status = 500;
3097 if (req->flags != BF_READ_ERROR)
3098 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
3099
3100 req->analysers = 0;
3101 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3102
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3103 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3104 if (s->listener->counters)
3105 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3106
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]3107 if (!(s->flags & SN_ERR_MASK))
3108 s->flags |= SN_ERR_PRXCOND;
3109 if (!(s->flags & SN_FINST_MASK))
3110 s->flags |= SN_FINST_T;
3111 return 0;
3112}
3113
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3114/* This function is an analyser which processes the HTTP request body. It looks
3115 * for parameters to be used for the load balancing algorithm (url_param). It
3116 * must only be called after the standard HTTP request processing has occurred,
3117 * because it expects the request to be parsed. It returns zero if it needs to
3118 * read more data, or 1 once it has completed its analysis.
3119 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]3120int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3121{
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3122 struct http_txn *txn = &s->txn;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3123 struct http_msg *msg = &s->txn.req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3124 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3125
3126 /* We have to parse the HTTP request body to find any required data.
3127 * "balance url_param check_post" should have been the only way to get
3128 * into this. We were brought here after HTTP header analysis, so all
3129 * related structures are ready.
3130 */
3131
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3132 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3133 goto missing_data;
3134
3135 if (msg->msg_state < HTTP_MSG_100_SENT) {
3136 /* If we have HTTP/1.1 and Expect: 100-continue, then we must
3137 * send an HTTP/1.1 100 Continue intermediate response.
3138 */
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]3139 if (txn->flags & TX_REQ_VER_11) {
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3140 struct hdr_ctx ctx;
3141 ctx.idx = 0;
3142 /* Expect is allowed in 1.1, look for it */
3143 if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) &&
3144 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
3145 buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len);
3146 }
3147 }
3148 msg->msg_state = HTTP_MSG_100_SENT;
3149 }
3150
3151 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3152 /* we have msg->col and msg->sov which both point to the first
3153 * byte of message body. msg->som still points to the beginning
3154 * of the message. We must save the body in req->lr because it
3155 * survives buffer re-alignments.
3156 */
3157 req->lr = req->data + msg->sov;
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3158 if (txn->flags & TX_REQ_TE_CHNK)
3159 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3160 else
3161 msg->msg_state = HTTP_MSG_DATA;
3162 }
3163
3164 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3165 /* read the chunk size and assign it to ->hdr_content_len, then
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3166 * set ->sov and ->lr to point to the body and switch to DATA or
3167 * TRAILERS state.
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3168 */
3169 int ret = http_parse_chunk_size(req, msg);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3170
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3171 if (!ret)
3172 goto missing_data;
3173 else if (ret < 0)
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3174 goto return_bad_req;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3175 }
3176
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3177 /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3178 * We have the first non-header byte in msg->col, which is either the
3179 * beginning of the chunk size or of the data. The first data byte is in
3180 * msg->sov, which is equal to msg->col when not using transfer-encoding.
3181 * We're waiting for at least <url_param_post_limit> bytes after msg->sov.
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3182 */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3183
3184 if (msg->hdr_content_len < limit)
3185 limit = msg->hdr_content_len;
3186
Willy Tarreau7c96f672009-12-27 22:47:25 +0100[diff] [blame]3187 if (req->l - (msg->sov - msg->som) >= limit) /* we have enough bytes now */
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3188 goto http_end;
3189
3190 missing_data:
3191 /* we get here if we need to wait for more data */
Willy Tarreau115acb92009-12-26 13:56:06 +0100[diff] [blame]3192 if (req->flags & BF_FULL)
3193 goto return_bad_req;
3194
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3195 if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
3196 txn->status = 408;
3197 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
3198 goto return_err_msg;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3199 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3200
3201 /* we get here if we need to wait for more data */
3202 if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3203 /* Not enough data. We'll re-use the http-request
3204 * timeout here. Ideally, we should set the timeout
3205 * relative to the accept() date. We just set the
3206 * request timeout once at the beginning of the
3207 * request.
3208 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]3209 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3210 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]3211 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3212 return 0;
3213 }
Willy Tarreau522d6c02009-12-06 18:49:18 +0100[diff] [blame]3214
3215 http_end:
3216 /* The situation will not evolve, so let's give up on the analysis. */
3217 s->logs.tv_request = now; /* update the request timer to reflect full request */
3218 req->analysers &= ~an_bit;
3219 req->analyse_exp = TICK_ETERNITY;
3220 return 1;
3221
3222 return_bad_req: /* let's centralize all bad requests */
3223 txn->req.msg_state = HTTP_MSG_ERROR;
3224 txn->status = 400;
3225 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
3226
3227 return_err_msg:
3228 req->analysers = 0;
3229 s->fe->counters.failed_req++;
3230 if (s->listener->counters)
3231 s->listener->counters->failed_req++;
3232
3233 if (!(s->flags & SN_ERR_MASK))
3234 s->flags |= SN_ERR_PRXCOND;
3235 if (!(s->flags & SN_FINST_MASK))
3236 s->flags |= SN_FINST_R;
3237 return 0;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]3238}
3239
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3240/* This function is an analyser which forwards request body (including chunk
3241 * sizes if any). It is called as soon as we must forward, even if we forward
3242 * zero byte. The only situation where it must not be called is when we're in
3243 * tunnel mode and we want to forward till the close. It's used both to forward
3244 * remaining data and to resync after end of body. It expects the msg_state to
3245 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
3246 * read more data, or 1 once we can go on with next request or end the session.
3247 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
3248 * bytes of pending data + the headers if not already done (between som and sov).
3249 * It eventually adjusts som to match sov after the data in between have been sent.
3250 */
3251int http_request_forward_body(struct session *s, struct buffer *req, int an_bit)
3252{
3253 struct http_txn *txn = &s->txn;
3254 struct http_msg *msg = &s->txn.req;
3255
Willy Tarreau21c5e4d2010-01-03 00:19:31 +0100[diff] [blame]3256 if (req->flags & (BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) {
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]3257 req->analysers &= ~an_bit;
3258 return 1;
3259 }
3260
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3261 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
3262 return 0;
3263
3264 /* Note that we don't have to send 100-continue back because we don't
3265 * need the data to complete our job, and it's up to the server to
3266 * decide whether to return 100, 417 or anything else in return of
3267 * an "Expect: 100-continue" header.
3268 */
3269
3270 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
3271 /* we have msg->col and msg->sov which both point to the first
3272 * byte of message body. msg->som still points to the beginning
3273 * of the message. We must save the body in req->lr because it
3274 * survives buffer re-alignments.
3275 */
3276 req->lr = req->data + msg->sov;
3277 if (txn->flags & TX_REQ_TE_CHNK)
3278 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
3279 else {
3280 msg->msg_state = HTTP_MSG_DATA;
3281 }
3282 }
3283
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3284 while (1) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]3285 /* we may have some data pending */
3286 if (msg->hdr_content_len || msg->som != msg->sov) {
3287 int bytes = msg->sov - msg->som;
3288 if (bytes < 0) /* sov may have wrapped at the end */
3289 bytes += req->size;
3290 buffer_forward(req, bytes + msg->hdr_content_len);
3291 msg->hdr_content_len = 0; /* don't forward that again */
3292 msg->som = msg->sov;
3293 }
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]3294
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3295 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
3296 /* read the chunk size and assign it to ->hdr_content_len, then
3297 * set ->sov and ->lr to point to the body and switch to DATA or
3298 * TRAILERS state.
3299 */
3300 int ret = http_parse_chunk_size(req, msg);
3301
3302 if (!ret)
3303 goto missing_data;
3304 else if (ret < 0)
3305 goto return_bad_req;
3306 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3307 }
3308 else if (msg->msg_state == HTTP_MSG_DATA) {
3309 /* must still forward */
3310 if (req->to_forward)
3311 return 0;
3312
3313 /* we're sending the last bits of request, the server's response
3314 * is expected in a short time. Most often the first read is enough
3315 * to bring all the headers, so we're preparing the response buffer
3316 * to read the response now. Note that we should probably move that
3317 * to a more appropriate place.
3318 */
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]3319 if (txn->rsp.msg_state == HTTP_MSG_RPBEFORE) {
3320 s->rep->flags &= ~BF_DONT_READ;
3321 s->rep->flags |= BF_READ_DONTWAIT;
3322 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3323
3324 /* nothing left to forward */
3325 if (txn->flags & TX_REQ_TE_CHNK)
3326 msg->msg_state = HTTP_MSG_DATA_CRLF;
3327 else {
3328 msg->msg_state = HTTP_MSG_DONE;
3329 }
3330 }
3331 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
3332 /* we want the CRLF after the data */
3333 int ret;
3334
3335 if (!(req->flags & BF_OUT_EMPTY))
3336 return 0;
3337 /* The output pointer does not move anymore, next unsent data
3338 * are available at ->w. Let's save that.
3339 */
3340 req->lr = req->w;
3341 ret = http_skip_chunk_crlf(req, msg);
3342
3343 if (ret == 0)
3344 goto missing_data;
3345 else if (ret < 0)
3346 goto return_bad_req;
3347 /* we're in MSG_CHUNK_SIZE now */
3348 }
3349 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
3350 int ret = http_forward_trailers(req, msg);
3351
3352 if (ret == 0)
3353 goto missing_data;
3354 else if (ret < 0)
3355 goto return_bad_req;
3356 /* we're in HTTP_MSG_DONE now */
3357 }
3358 else if (msg->msg_state == HTTP_MSG_DONE) {
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]3359 /* No need to read anymore, the request was completely parsed */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3360 req->flags |= BF_DONT_READ;
3361
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]3362 if (txn->rsp.msg_state < HTTP_MSG_DONE && txn->rsp.msg_state != HTTP_MSG_ERROR) {
3363 /* The server has not finished to respond, so we
3364 * don't want to move in order not to upset it.
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3365 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3366 return 0;
3367 }
3368
3369 /* when we support keep-alive or server-close modes, we'll have
3370 * to reset the transaction here.
3371 */
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]3372
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]3373 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
3374 /* initiate a connection close to the server */
3375 req->cons->flags |= SI_FL_NOLINGER;
3376 buffer_shutw_now(req);
3377 }
3378 else if ((s->fe->options | s->be->options) & PR_O_FORCE_CLO) {
Willy Tarreau9438c712009-12-29 14:39:48 +0100[diff] [blame]3379 /* Option forceclose is set, let's enforce it now
3380 * that the transfer is complete. We can safely speed
3381 * up the close because we know the server has received
3382 * everything we wanted it to receive.
3383 */
3384 req->cons->flags |= SI_FL_NOLINGER;
Willy Tarreau82eeaf22009-12-29 12:09:05 +0100[diff] [blame]3385 buffer_abort(req);
3386 }
3387
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]3388 if (req->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
3389 if (req->flags & BF_OUT_EMPTY)
3390 msg->msg_state = HTTP_MSG_CLOSED;
3391 else
3392 msg->msg_state = HTTP_MSG_CLOSING;
3393 }
3394 else {
3395 /* for other modes, we let further requests pass for now */
3396 req->flags &= ~BF_DONT_READ;
3397 /* FIXME: we're still forced to do that here */
3398 s->rep->flags &= ~BF_DONT_READ;
3399 break;
3400 }
3401 }
3402 else if (msg->msg_state == HTTP_MSG_CLOSING) {
3403 /* nothing else to forward, just waiting for the buffer to be empty */
3404 if (!(req->flags & BF_OUT_EMPTY))
3405 return 0;
3406 msg->msg_state = HTTP_MSG_CLOSED;
3407 }
3408 else if (msg->msg_state == HTTP_MSG_CLOSED) {
3409 req->flags &= ~BF_DONT_READ;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]3410
3411 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
3412
3413 /* FIXME : this part is 1) awful, 2) tricky, 3) duplicated
3414 * ... but it works.
3415 * We need a better way to force a connection close without
3416 * any risk of propagation to the other side. We need a more
3417 * portable way of releasing a backend's and a server's
3418 * connections. We need a safer way to reinitialize buffer
3419 * flags. We also need a more accurate method for computing
3420 * per-request data.
3421 */
3422 s->req->cons->flags |= SI_FL_NOLINGER;
3423 s->req->cons->shutr(s->req->cons);
3424 s->req->cons->shutw(s->req->cons);
3425
3426 if (s->flags & SN_BE_ASSIGNED)
3427 s->be->beconn--;
3428
3429 s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
3430 session_process_counters(s);
3431
3432 if (s->txn.status) {
3433 int n;
3434
3435 n = s->txn.status / 100;
3436 if (n < 1 || n > 5)
3437 n = 0;
3438
3439 if (s->fe->mode == PR_MODE_HTTP)
3440 s->fe->counters.p.http.rsp[n]++;
3441
3442 if ((s->flags & SN_BE_ASSIGNED) && (s->fe != s->be) &&
3443 (s->be->mode == PR_MODE_HTTP))
3444 s->be->counters.p.http.rsp[n]++;
3445 }
3446
3447 /* don't count other requests' data */
3448 s->logs.bytes_in -= s->req->l - s->req->send_max;
3449 s->logs.bytes_out -= s->rep->l - s->rep->send_max;
3450
3451 /* let's do a final log if we need it */
3452 if (s->logs.logwait &&
3453 !(s->flags & SN_MONITOR) &&
3454 (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
3455 s->do_log(s);
3456 }
3457
3458 s->logs.accept_date = date; /* user-visible date for logging */
3459 s->logs.tv_accept = now; /* corrected date for internal use */
3460 tv_zero(&s->logs.tv_request);
3461 s->logs.t_queue = -1;
3462 s->logs.t_connect = -1;
3463 s->logs.t_data = -1;
3464 s->logs.t_close = 0;
3465 s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
3466 s->logs.srv_queue_size = 0; /* we will get this number soon */
3467
3468 s->logs.bytes_in = s->req->total = s->req->l - s->req->send_max;
3469 s->logs.bytes_out = s->rep->total = s->rep->l - s->rep->send_max;
3470
3471 if (s->pend_pos)
3472 pendconn_free(s->pend_pos);
3473
3474 if (s->srv) {
3475 if (s->flags & SN_CURR_SESS) {
3476 s->flags &= ~SN_CURR_SESS;
3477 s->srv->cur_sess--;
3478 }
3479 if (may_dequeue_tasks(s->srv, s->be))
3480 process_srv_queue(s->srv);
3481 }
3482
3483 if (unlikely(s->srv_conn))
3484 sess_change_server(s, NULL);
3485 s->srv = NULL;
3486
3487 s->req->cons->state = s->req->cons->prev_state = SI_ST_INI;
3488 s->req->cons->fd = -1; /* just to help with debugging */
3489 s->req->cons->err_type = SI_ET_NONE;
3490 s->req->cons->err_loc = NULL;
3491 s->req->cons->exp = TICK_ETERNITY;
3492 s->req->cons->flags = SI_FL_NONE;
3493 s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST|BF_AUTO_CLOSE);
3494 s->rep->flags &= ~(BF_SHUTR|BF_SHUTR_NOW|BF_READ_ATTACHED|BF_READ_ERROR|BF_READ_NOEXP|BF_STREAMER|BF_STREAMER_FAST|BF_AUTO_CLOSE|BF_WRITE_PARTIAL);
3495 s->flags &= ~(SN_DIRECT|SN_ASSIGNED|SN_ADDR_SET|SN_BE_ASSIGNED);
3496 s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE);
3497 s->txn.meth = 0;
3498 http_reset_txn(s);
3499 txn->flags |= TX_NOT_FIRST;
3500 if (s->be->options2 & PR_O2_INDEPSTR)
3501 s->req->cons->flags |= SI_FL_INDEP_STR;
3502
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]3503 /* if the request buffer is not empty, it means we're
3504 * about to process another request, so send pending
3505 * data with MSG_MORE to merge TCP packets when possible.
Willy Tarreau5e8949c2010-01-03 14:38:03 +0100[diff] [blame^]3506 * Also, let's not start reading a small request packet,
3507 * we may prefer to read a larger one later.
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]3508 */
Willy Tarreau5e8949c2010-01-03 14:38:03 +0100[diff] [blame^]3509 if (s->req->l > s->req->send_max) {
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]3510 s->rep->flags |= BF_EXPECT_MORE;
Willy Tarreau5e8949c2010-01-03 14:38:03 +0100[diff] [blame^]3511 s->req->flags |= BF_DONT_READ;
3512 }
Willy Tarreauface8392010-01-03 11:37:54 +0100[diff] [blame]3513
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]3514 /* make ->lr point to the first non-forwarded byte */
3515 s->req->lr = s->req->w + s->req->send_max;
3516 if (s->req->lr >= s->req->data + s->req->size)
3517 s->req->lr -= s->req->size;
3518 s->rep->lr = s->rep->w + s->rep->send_max;
3519 if (s->rep->lr >= s->rep->data + s->rep->size)
3520 s->rep->lr -= s->req->size;
3521
3522 s->req->analysers |= s->fe->fe_req_ana;
3523 s->rep->analysers = 0;
3524 }
3525
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]3526 /* FIXME: we're still forced to do that here */
3527 s->rep->flags &= ~BF_DONT_READ;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]3528 break;
3529 }
3530 }
3531
3532 /* OK we're done with the data phase */
3533 req->analysers &= ~an_bit;
3534 return 1;
3535
3536 missing_data:
3537 /* forward the chunk size as well as any pending data */
3538 if (msg->hdr_content_len || msg->som != msg->sov) {
3539 buffer_forward(req, msg->sov - msg->som + msg->hdr_content_len);
3540 msg->hdr_content_len = 0; /* don't forward that again */
3541 msg->som = msg->sov;
3542 }
3543
3544 if (req->flags & BF_FULL)
3545 goto return_bad_req;
3546 /* the session handler will take care of timeouts and errors */
3547 return 0;
3548
3549 return_bad_req: /* let's centralize all bad requests */
3550 txn->req.msg_state = HTTP_MSG_ERROR;
3551 txn->status = 400;
3552 /* Note: we don't send any error if some data were already sent */
3553 stream_int_cond_close(req->prod, (txn->rsp.msg_state < HTTP_MSG_BODY) ? error_message(s, HTTP_ERR_400) : NULL);
3554
3555 req->analysers = 0;
3556 s->fe->counters.failed_req++;
3557 if (s->listener->counters)
3558 s->listener->counters->failed_req++;
3559
3560 if (!(s->flags & SN_ERR_MASK))
3561 s->flags |= SN_ERR_PRXCOND;
3562 if (!(s->flags & SN_FINST_MASK))
3563 s->flags |= SN_FINST_R;
3564 return 0;
3565}
3566
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3567/* This stream analyser waits for a complete HTTP response. It returns 1 if the
3568 * processing can continue on next analysers, or zero if it either needs more
3569 * data or wants to immediately abort the response (eg: timeout, error, ...). It
3570 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
3571 * when it has nothing left to do, and may remove any analyser when it wants to
3572 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3573 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3574int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]3575{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3576 struct http_txn *txn = &s->txn;
3577 struct http_msg *msg = &txn->rsp;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3578 struct hdr_ctx ctx;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3579 int use_close_only;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3580 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]3581 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]3582
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]3583 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]3584 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3585 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]3586 rep,
3587 rep->rex, rep->wex,
3588 rep->flags,
3589 rep->l,
3590 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]3591
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3592 /*
3593 * Now parse the partial (or complete) lines.
3594 * We will check the response syntax, and also join multi-line
3595 * headers. An index of all the lines will be elaborated while
3596 * parsing.
3597 *
3598 * For the parsing, we use a 28 states FSM.
3599 *
3600 * Here is the information we currently have :
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]3601 * rep->data + msg->som = beginning of response
3602 * rep->data + msg->eoh = end of processed headers / start of current one
3603 * msg->eol = end of current header or line (LF or CRLF)
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3604 * rep->lr = first non-visited byte
3605 * rep->r = end of data
3606 */
3607
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]3608 /* There's a protected area at the end of the buffer for rewriting
3609 * purposes. We don't want to start to parse the request if the
3610 * protected area is affected, because we may have to move processed
3611 * data later, which is much more complicated.
3612 */
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]3613 if (rep->l && msg->msg_state < HTTP_MSG_ERROR) {
3614 if (unlikely((rep->flags & BF_FULL) ||
3615 rep->r < rep->lr ||
3616 rep->r > rep->data + rep->size - global.tune.maxrewrite)) {
3617 if (rep->send_max) {
3618 /* some data has still not left the buffer, wake us once that's done */
3619 buffer_dont_close(rep);
3620 rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
3621 return 0;
3622 }
3623 if (rep->l <= rep->size - global.tune.maxrewrite)
3624 http_buffer_heavy_realign(rep, msg);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]3625 }
3626
Willy Tarreau2ab6eb12010-01-02 22:04:45 +0100[diff] [blame]3627 if (likely(rep->lr < rep->r))
3628 http_msg_analyzer(rep, msg, &txn->hdr_idx);
Willy Tarreau83e3af02009-12-28 17:39:57 +0100[diff] [blame]3629 }
3630
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3631 /* 1: we might have to print this header in debug mode */
3632 if (unlikely((global.mode & MODE_DEBUG) &&
3633 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3634 (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3635 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3636
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3637 sol = rep->data + msg->som;
3638 eol = sol + msg->sl.rq.l;
3639 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3640
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3641 sol += hdr_idx_first_pos(&txn->hdr_idx);
3642 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3643
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3644 while (cur_idx) {
3645 eol = sol + txn->hdr_idx.v[cur_idx].len;
3646 debug_hdr("srvhdr", s, sol, eol);
3647 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
3648 cur_idx = txn->hdr_idx.v[cur_idx].next;
3649 }
3650 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3651
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3652 /*
3653 * Now we quickly check if we have found a full valid response.
3654 * If not so, we check the FD and buffer states before leaving.
3655 * A full response is indicated by the fact that we have seen
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3656 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3657 * responses are checked first.
3658 *
3659 * Depending on whether the client is still there or not, we
3660 * may send an error response back or not. Note that normally
3661 * we should only check for HTTP status there, and check I/O
3662 * errors somewhere else.
3663 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3664
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3665 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3666 /* Invalid response */
3667 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
3668 /* we detected a parsing error. We want to archive this response
3669 * in the dedicated proxy area for later troubleshooting.
3670 */
3671 hdr_response_bad:
3672 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
3673 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
3674
3675 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3676 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3677 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3678 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
3679 }
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3680
3681 rep->analysers = 0;
3682 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]3683 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3684 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
3685
3686 if (!(s->flags & SN_ERR_MASK))
3687 s->flags |= SN_ERR_PRXCOND;
3688 if (!(s->flags & SN_FINST_MASK))
3689 s->flags |= SN_FINST_H;
3690
3691 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3692 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3693
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3694 /* too large response does not fit in buffer. */
3695 else if (rep->flags & BF_FULL) {
3696 goto hdr_response_bad;
3697 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3698
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3699 /* read error */
3700 else if (rep->flags & BF_READ_ERROR) {
3701 if (msg->err_pos >= 0)
3702 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3703
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3704 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3705 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3706 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3707 health_adjust(s->srv, HANA_STATUS_HTTP_READ_ERROR);
3708 }
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]3709
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3710 rep->analysers = 0;
3711 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]3712 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3713 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3714
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3715 if (!(s->flags & SN_ERR_MASK))
3716 s->flags |= SN_ERR_SRVCL;
3717 if (!(s->flags & SN_FINST_MASK))
3718 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]3719 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3720 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3721
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3722 /* read timeout : return a 504 to the client. */
3723 else if (rep->flags & BF_READ_TIMEOUT) {
3724 if (msg->err_pos >= 0)
3725 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3726
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3727 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3728 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3729 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3730 health_adjust(s->srv, HANA_STATUS_HTTP_READ_TIMEOUT);
3731 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3732
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3733 rep->analysers = 0;
3734 txn->status = 504;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]3735 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3736 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]3737
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3738 if (!(s->flags & SN_ERR_MASK))
3739 s->flags |= SN_ERR_SRVTO;
3740 if (!(s->flags & SN_FINST_MASK))
3741 s->flags |= SN_FINST_H;
3742 return 0;
3743 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]3744
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3745 /* close from server */
3746 else if (rep->flags & BF_SHUTR) {
3747 if (msg->err_pos >= 0)
3748 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3749
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3750 s->be->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3751 if (s->srv) {
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3752 s->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3753 health_adjust(s->srv, HANA_STATUS_HTTP_BROKEN_PIPE);
3754 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3755
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3756 rep->analysers = 0;
3757 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]3758 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3759 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3760
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3761 if (!(s->flags & SN_ERR_MASK))
3762 s->flags |= SN_ERR_SRVCL;
3763 if (!(s->flags & SN_FINST_MASK))
3764 s->flags |= SN_FINST_H;
3765 return 0;
3766 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]3767
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3768 /* write error to client (we don't send any message then) */
3769 else if (rep->flags & BF_WRITE_ERROR) {
3770 if (msg->err_pos >= 0)
3771 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]3772
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3773 s->be->counters.failed_resp++;
3774 rep->analysers = 0;
3775
3776 if (!(s->flags & SN_ERR_MASK))
3777 s->flags |= SN_ERR_CLICL;
3778 if (!(s->flags & SN_FINST_MASK))
3779 s->flags |= SN_FINST_H;
3780
3781 /* process_session() will take care of the error */
3782 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3783 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3784
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3785 buffer_dont_close(rep);
3786 return 0;
3787 }
3788
3789 /* More interesting part now : we know that we have a complete
3790 * response which at least looks like HTTP. We have an indicator
3791 * of each header's length, so we can parse them quickly.
3792 */
3793
3794 if (unlikely(msg->err_pos >= 0))
3795 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
3796
3797 /* ensure we keep this pointer to the beginning of the message */
3798 msg->sol = rep->data + msg->som;
3799
3800 /*
3801 * 1: get the status code
3802 */
3803 n = rep->data[msg->sl.st.c] - '0';
3804 if (n < 1 || n > 5)
3805 n = 0;
3806 s->srv->counters.p.http.rsp[n]++;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3807
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3808 /* check if the response is HTTP/1.1 or above */
3809 if ((msg->sl.st.v_l == 8) &&
3810 ((rep->data[msg->som + 5] > '1') ||
3811 ((rep->data[msg->som + 5] == '1') &&
3812 (rep->data[msg->som + 7] >= '1'))))
3813 txn->flags |= TX_RES_VER_11;
3814
3815 /* "connection" has not been parsed yet */
3816 txn->flags &= ~TX_CON_HDR_PARS;
3817
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3818 /* transfer length unknown*/
3819 txn->flags &= ~TX_RES_XFER_LEN;
3820
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3821 txn->status = strl2ui(rep->data + msg->sl.st.c, msg->sl.st.c_l);
3822
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]3823 if (txn->status >= 100 && txn->status < 500)
3824 health_adjust(s->srv, HANA_STATUS_HTTP_OK);
3825 else
3826 health_adjust(s->srv, HANA_STATUS_HTTP_STS);
3827
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3828 /*
3829 * 2: check for cacheability.
3830 */
3831
3832 switch (txn->status) {
3833 case 200:
3834 case 203:
3835 case 206:
3836 case 300:
3837 case 301:
3838 case 410:
3839 /* RFC2616 @13.4:
3840 * "A response received with a status code of
3841 * 200, 203, 206, 300, 301 or 410 MAY be stored
3842 * by a cache (...) unless a cache-control
3843 * directive prohibits caching."
3844 *
3845 * RFC2616 @9.5: POST method :
3846 * "Responses to this method are not cacheable,
3847 * unless the response includes appropriate
3848 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3849 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3850 if (likely(txn->meth != HTTP_METH_POST) &&
3851 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
3852 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
3853 break;
3854 default:
3855 break;
3856 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3857
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3858 /*
3859 * 3: we may need to capture headers
3860 */
3861 s->logs.logwait &= ~LW_RESP;
3862 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap))
3863 capture_headers(rep->data + msg->som, &txn->hdr_idx,
3864 txn->rsp.cap, s->fe->rsp_cap);
3865
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3866 /* 4: determine the transfer-length.
3867 * According to RFC2616 #4.4, amended by the HTTPbis working group,
3868 * the presence of a message-body in a RESPONSE and its transfer length
3869 * must be determined that way :
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3870 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3871 * All responses to the HEAD request method MUST NOT include a
3872 * message-body, even though the presence of entity-header fields
3873 * might lead one to believe they do. All 1xx (informational), 204
3874 * (No Content), and 304 (Not Modified) responses MUST NOT include a
3875 * message-body. All other responses do include a message-body,
3876 * although it MAY be of zero length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3877 *
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3878 * 1. Any response which "MUST NOT" include a message-body (such as the
3879 * 1xx, 204 and 304 responses and any response to a HEAD request) is
3880 * always terminated by the first empty line after the header fields,
3881 * regardless of the entity-header fields present in the message.
3882 *
3883 * 2. If a Transfer-Encoding header field (Section 9.7) is present and
3884 * the "chunked" transfer-coding (Section 6.2) is used, the
3885 * transfer-length is defined by the use of this transfer-coding.
3886 * If a Transfer-Encoding header field is present and the "chunked"
3887 * transfer-coding is not present, the transfer-length is defined by
3888 * the sender closing the connection.
3889 *
3890 * 3. If a Content-Length header field is present, its decimal value in
3891 * OCTETs represents both the entity-length and the transfer-length.
3892 * If a message is received with both a Transfer-Encoding header
3893 * field and a Content-Length header field, the latter MUST be ignored.
3894 *
3895 * 4. If the message uses the media type "multipart/byteranges", and
3896 * the transfer-length is not otherwise specified, then this self-
3897 * delimiting media type defines the transfer-length. This media
3898 * type MUST NOT be used unless the sender knows that the recipient
3899 * can parse it; the presence in a request of a Range header with
3900 * multiple byte-range specifiers from a 1.1 client implies that the
3901 * client can parse multipart/byteranges responses.
3902 *
3903 * 5. By the server closing the connection.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3904 */
3905
3906 /* Skip parsing if no content length is possible. The response flags
3907 * 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]3908 * the real header value, and we note that we know the response's length.
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3909 * FIXME: should we parse anyway and return an error on chunked encoding ?
3910 */
3911 if (txn->meth == HTTP_METH_HEAD ||
3912 (txn->status >= 100 && txn->status < 200) ||
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3913 txn->status == 204 || txn->status == 304) {
3914 txn->flags |= TX_RES_XFER_LEN;
3915 goto skip_content_length;
3916 }
3917
3918 if (txn->meth == HTTP_METH_CONNECT)
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3919 goto skip_content_length;
3920
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3921 use_close_only = 0;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3922 ctx.idx = 0;
Willy Tarreau9e13c3c2009-12-22 09:59:58 +0100[diff] [blame]3923 while ((txn->flags & TX_RES_VER_11) &&
3924 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3925 if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
3926 txn->flags |= (TX_RES_TE_CHNK | TX_RES_XFER_LEN);
3927 else if (txn->flags & TX_RES_TE_CHNK) {
3928 /* bad transfer-encoding (chunked followed by something else) */
3929 use_close_only = 1;
3930 txn->flags &= ~(TX_RES_TE_CHNK | TX_RES_XFER_LEN);
3931 break;
3932 }
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3933 }
3934
3935 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
3936 ctx.idx = 0;
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3937 while (!(txn->flags & TX_RES_TE_CHNK) && !use_close_only &&
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3938 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
3939 signed long long cl;
3940
3941 if (!ctx.vlen)
3942 goto hdr_response_bad;
3943
3944 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
3945 goto hdr_response_bad; /* parse failure */
3946
3947 if (cl < 0)
3948 goto hdr_response_bad;
3949
3950 if ((txn->flags & TX_RES_CNT_LEN) && (msg->hdr_content_len != cl))
3951 goto hdr_response_bad; /* already specified, was different */
3952
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3953 txn->flags |= TX_RES_CNT_LEN | TX_RES_XFER_LEN;
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3954 msg->hdr_content_len = cl;
3955 }
3956
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]3957 /* FIXME: we should also implement the multipart/byterange method.
3958 * For now on, we resort to close mode in this case (unknown length).
3959 */
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3960skip_content_length:
Willy Tarreaub8c82c22009-10-18 23:45:12 +0200[diff] [blame]3961
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3962 /* end of job, return OK */
3963 rep->analysers &= ~an_bit;
3964 rep->analyse_exp = TICK_ETERNITY;
3965 return 1;
3966}
3967
3968/* This function performs all the processing enabled for the current response.
3969 * It normally returns zero, but may return 1 if it absolutely needs to be
3970 * called again after other functions. It relies on buffers flags, and updates
3971 * t->rep->analysers. It might make sense to explode it into several other
3972 * functions. It works like process_request (see indications above).
3973 */
3974int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
3975{
3976 struct http_txn *txn = &t->txn;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3977 struct http_msg *msg = &txn->rsp;
3978 struct proxy *cur_proxy;
3979 int cur_idx;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3980 int conn_ka = 0, conn_cl = 0;
3981 int must_close = 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]3982 int must_del_close = 0, must_keep = 0;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3983
3984 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3985 now_ms, __FUNCTION__,
3986 t,
3987 rep,
3988 rep->rex, rep->wex,
3989 rep->flags,
3990 rep->l,
3991 rep->analysers);
3992
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]3993 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]3994 return 0;
3995
3996 rep->analysers &= ~an_bit;
3997 rep->analyse_exp = TICK_ETERNITY;
3998
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]3999 /* Now we have to check if we need to modify the Connection header.
4000 * This is more difficult on the response than it is on the request,
4001 * because we can have two different HTTP versions and we don't know
4002 * how the client will interprete a response. For instance, let's say
4003 * that the client sends a keep-alive request in HTTP/1.0 and gets an
4004 * HTTP/1.1 response without any header. Maybe it will bound itself to
4005 * HTTP/1.0 because it only knows about it, and will consider the lack
4006 * of header as a close, or maybe it knows HTTP/1.1 and can consider
4007 * the lack of header as a keep-alive. Thus we will use two flags
4008 * indicating how a request MAY be understood by the client. In case
4009 * of multiple possibilities, we'll fix the header to be explicit. If
4010 * ambiguous cases such as both close and keepalive are seen, then we
4011 * will fall back to explicit close. Note that we won't take risks with
4012 * HTTP/1.0 clients which may not necessarily understand keep-alive.
4013 */
4014
4015 if ((txn->meth != HTTP_METH_CONNECT) &&
4016 (txn->status >= 200) &&
4017 (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN &&
4018 !(txn->flags & TX_CON_HDR_PARS)) {
4019 int may_keep = 0, may_close = 0; /* how it may be understood */
4020 struct hdr_ctx ctx;
4021
4022 ctx.idx = 0;
4023 while (http_find_header2("Connection", 10, msg->sol, &txn->hdr_idx, &ctx)) {
4024 if (ctx.vlen == 5 && strncasecmp(ctx.line + ctx.val, "close", 5) == 0)
4025 conn_cl = 1;
4026 else if (ctx.vlen == 10 && strncasecmp(ctx.line + ctx.val, "keep-alive", 10) == 0)
4027 conn_ka = 1;
4028 }
4029
4030 if (conn_cl) {
4031 /* close header present */
4032 may_close = 1;
4033 if (conn_ka) /* we have both close and keep-alive */
4034 may_keep = 1;
4035 }
4036 else if (conn_ka) {
4037 /* keep-alive alone */
4038 may_keep = 1;
4039 }
4040 else {
4041 /* no close nor keep-alive header */
4042 if (txn->flags & TX_RES_VER_11)
4043 may_keep = 1;
4044 else
4045 may_close = 1;
4046
4047 if (txn->flags & TX_REQ_VER_11)
4048 may_keep = 1;
4049 else
4050 may_close = 1;
4051 }
4052
4053 /* let's update the transaction status to reflect any close.
4054 * Note that ambiguous cases with keep & close will also be
Willy Tarreaue8e785b2009-12-26 15:34:26 +0100[diff] [blame]4055 * handled. We also explicitly state that we will close in
4056 * case of an ambiguous response having no content-length.
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4057 */
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4058 if ((may_close &&
4059 (may_keep || ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_SCL))) ||
4060 !(txn->flags & TX_RES_XFER_LEN))
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4061 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
4062
4063 /* Now we must adjust the response header :
4064 * - set "close" if may_keep and WANT_CLO
4065 * - remove "close" if WANT_SCL and REQ_1.1 and may_close and (content-length or TE_CHNK)
4066 * - add "keep-alive" if WANT_SCL and REQ_1.0 and may_close and content-length
4067 *
4068 * Until we support the server-close mode, we'll only support the set "close".
4069 */
4070 if (may_keep && (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO)
4071 must_close = 1;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4072 else if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
4073 may_close && (txn->flags & TX_RES_XFER_LEN)) {
4074 must_del_close = 1;
4075 if (!(txn->flags & TX_REQ_VER_11))
4076 must_keep = 1;
4077 }
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4078
4079 txn->flags |= TX_CON_HDR_PARS;
4080 }
4081
4082 /* We might have to check for "Connection:" if the server
4083 * returns a connection status that is not compatible with
4084 * the client's or with the config.
4085 */
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4086 if ((txn->status >= 200) && (must_del_close|must_close) && (conn_cl|conn_ka)) {
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4087 char *cur_ptr, *cur_end, *cur_next;
4088 int cur_idx, old_idx, delta, val;
4089 int must_delete;
4090 struct hdr_idx_elem *cur_hdr;
4091
4092 /* we just have to remove the headers if both sides are 1.0 */
4093 must_delete = !(txn->flags & TX_REQ_VER_11) && !(txn->flags & TX_RES_VER_11);
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4094
4095 /* same if we want to re-enable keep-alive on 1.1 */
4096 must_delete |= must_del_close;
4097
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4098 cur_next = rep->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
4099
4100 for (old_idx = 0; (cur_idx = txn->hdr_idx.v[old_idx].next); old_idx = cur_idx) {
4101 cur_hdr = &txn->hdr_idx.v[cur_idx];
4102 cur_ptr = cur_next;
4103 cur_end = cur_ptr + cur_hdr->len;
4104 cur_next = cur_end + cur_hdr->cr + 1;
4105
4106 val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
4107 if (!val)
4108 continue;
4109
4110 /* 3 possibilities :
4111 * - we have already set "Connection: close" or we're in
4112 * HTTP/1.0, so we remove this line.
4113 * - we have not yet set "Connection: close", but this line
4114 * indicates close. We leave it untouched and set the flag.
4115 * - we have not yet set "Connection: close", and this line
4116 * indicates non-close. We replace it and set the flag.
4117 */
4118 if (must_delete) {
4119 delta = buffer_replace2(rep, cur_ptr, cur_next, NULL, 0);
4120 http_msg_move_end(&txn->rsp, delta);
4121 cur_next += delta;
4122 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
4123 txn->hdr_idx.used--;
4124 cur_hdr->len = 0;
4125 must_close = 0;
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4126 must_del_close = 0;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4127 } else {
4128 if (cur_end - cur_ptr - val != 5 ||
4129 strncasecmp(cur_ptr + val, "close", 5) != 0) {
4130 delta = buffer_replace2(rep, cur_ptr + val, cur_end,
4131 "close", 5);
4132 cur_next += delta;
4133 cur_hdr->len += delta;
4134 http_msg_move_end(&txn->rsp, delta);
4135 }
4136 must_delete = 1;
4137 must_close = 0;
4138 }
4139 } /* for loop */
4140 } /* if must close keep-alive */
4141
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame]4142 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4143 /*
4144 * 3: we will have to evaluate the filters.
4145 * As opposed to version 1.2, now they will be evaluated in the
4146 * filters order and not in the header order. This means that
4147 * each filter has to be validated among all headers.
4148 *
4149 * Filters are tried with ->be first, then with ->fe if it is
4150 * different from ->be.
4151 */
4152
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4153 cur_proxy = t->be;
4154 while (1) {
4155 struct proxy *rule_set = cur_proxy;
4156
4157 /* try headers filters */
4158 if (rule_set->rsp_exp != NULL) {
4159 if (apply_filters_to_response(t, rep, rule_set->rsp_exp) < 0) {
4160 return_bad_resp:
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4161 if (t->srv) {
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4162 t->srv->counters.failed_resp++;
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100[diff] [blame]4163 health_adjust(t->srv, HANA_STATUS_HTTP_RSP);
4164 }
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4165 cur_proxy->counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4166 return_srv_prx_502:
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]4167 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4168 txn->status = 502;
Willy Tarreauc88ea682009-12-29 14:56:36 +0100[diff] [blame]4169 rep->prod->flags |= SI_FL_NOLINGER;
Willy Tarreau8e89b842009-10-18 23:56:35 +0200[diff] [blame]4170 stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4171 if (!(t->flags & SN_ERR_MASK))
4172 t->flags |= SN_ERR_PRXCOND;
4173 if (!(t->flags & SN_FINST_MASK))
4174 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]4175 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4176 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4177 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]4178
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4179 /* has the response been denied ? */
4180 if (txn->flags & TX_SVDENY) {
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]4181 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4182 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4183
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4184 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4185 if (t->listener->counters)
4186 t->listener->counters->denied_resp++;
4187
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4188 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]4189 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4190
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4191 /* add response headers from the rule sets in the same order */
4192 for (cur_idx = 0; cur_idx < rule_set->nb_rspadd; cur_idx++) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]4193 if (txn->status < 200)
4194 break;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4195 if (unlikely(http_header_add_tail(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4196 rule_set->rsp_add[cur_idx]) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4197 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]4198 }
4199
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4200 /* check whether we're already working on the frontend */
4201 if (cur_proxy == t->fe)
4202 break;
4203 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4204 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4205
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4206 /*
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4207 * We may be facing a 1xx response (100 continue, 101 switching protocols),
4208 * in which case this is not the right response, and we're waiting for the
4209 * next one. Let's allow this response to go to the client and wait for the
4210 * next one.
4211 */
4212 if (txn->status < 200) {
4213 hdr_idx_init(&txn->hdr_idx);
4214 buffer_forward(rep, rep->lr - (rep->data + msg->som));
4215 msg->msg_state = HTTP_MSG_RPBEFORE;
4216 txn->status = 0;
4217 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
4218 return 1;
4219 }
4220
4221 /* we don't have any 1xx status code now */
4222
4223 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4224 * 4: check for server cookie.
4225 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4226 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name ||
4227 (t->be->options & PR_O_CHK_CACHE))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4228 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4229
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4230
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4231 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4232 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4233 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4234 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4235 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4236
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4237 /*
4238 * 6: add server cookie in the response if needed
4239 */
4240 if ((t->srv) && !(t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_INS) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4241 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST))) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4242 int len;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4243
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4244 /* the server is known, it's not the one the client requested, we have to
4245 * insert a set-cookie here, except if we want to insert only on POST
4246 * requests and this one isn't. Note that servers which don't have cookies
4247 * (eg: some backup servers) will return a full cookie removal request.
4248 */
4249 len = sprintf(trash, "Set-Cookie: %s=%s; path=/",
4250 t->be->cookie_name,
4251 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]4252
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4253 if (t->be->cookie_domain)
4254 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4255
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4256 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4257 trash, len) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4258 goto return_bad_resp;
4259 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4260
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4261 /* Here, we will tell an eventual cache on the client side that we don't
4262 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
4263 * Some caches understand the correct form: 'no-cache="set-cookie"', but
4264 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
4265 */
4266 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4267
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4268 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4269
4270 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4271 "Cache-control: private", 22) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4272 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4273 }
4274 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4275
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4276 /*
4277 * 7: check if result will be cacheable with a cookie.
4278 * We'll block the response if security checks have caught
4279 * nasty things such as a cacheable cookie.
4280 */
4281 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) ==
4282 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) &&
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4283 (t->be->options & PR_O_CHK_CACHE)) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4284
4285 /* we're in presence of a cacheable response containing
4286 * a set-cookie header. We'll block it as requested by
4287 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4288 */
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]4289 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4290 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4291
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4292 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4293 if (t->listener->counters)
4294 t->listener->counters->denied_resp++;
4295
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4296 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
4297 t->be->id, t->srv?t->srv->id:"<dispatch>");
4298 send_log(t->be, LOG_ALERT,
4299 "Blocking cacheable cookie in response from instance %s, server %s.\n",
4300 t->be->id, t->srv?t->srv->id:"<dispatch>");
4301 goto return_srv_prx_502;
4302 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4303
4304 /*
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4305 * 8: add "Connection: close" if needed and not yet set. This is
4306 * only needed for 1.1 responses since we know there is no other
4307 * Connection header.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4308 */
Willy Tarreau63c9e5f2009-12-22 16:01:27 +0100[diff] [blame]4309 if (must_close && (txn->flags & TX_RES_VER_11)) {
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4310 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
Willy Tarreau58cc8722009-12-28 06:57:33 +0100[diff] [blame]4311 "Connection: close", 17) < 0))
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4312 goto return_bad_resp;
Willy Tarreau5b154472009-12-21 20:11:07 +0100[diff] [blame]4313 must_close = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4314 }
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4315 else if (must_keep && !(txn->flags & TX_REQ_VER_11)) {
4316 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
4317 "Connection: keep-alive", 22) < 0))
4318 goto return_bad_resp;
4319 must_keep = 0;
4320 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4321
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4322 if (txn->flags & TX_RES_XFER_LEN)
4323 rep->analysers |= AN_RES_HTTP_XFER_BODY;
Willy Tarreau03945942009-12-22 16:50:27 +0100[diff] [blame]4324
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4325 /*************************************************************
4326 * OK, that's finished for the headers. We have done what we *
4327 * could. Let's switch to the DATA state. *
4328 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4329
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4330 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4331
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4332 /* if the user wants to log as soon as possible, without counting
4333 * bytes from the server, then this is the right moment. We have
4334 * to temporarily assign bytes_out to log what we currently have.
4335 */
4336 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
4337 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
4338 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]4339 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4340 t->logs.bytes_out = 0;
4341 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4342
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4343 /* Note: we must not try to cheat by jumping directly to DATA,
4344 * otherwise we would not let the client side wake up.
4345 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4346
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]4347 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]4348 }
4349 return 0;
4350}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4351
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4352/* This function is an analyser which forwards response body (including chunk
4353 * sizes if any). It is called as soon as we must forward, even if we forward
4354 * zero byte. The only situation where it must not be called is when we're in
4355 * tunnel mode and we want to forward till the close. It's used both to forward
4356 * remaining data and to resync after end of body. It expects the msg_state to
4357 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
4358 * read more data, or 1 once we can go on with next request or end the session.
4359 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len
4360 * bytes of pending data + the headers if not already done (between som and sov).
4361 * It eventually adjusts som to match sov after the data in between have been sent.
4362 */
4363int http_response_forward_body(struct session *s, struct buffer *res, int an_bit)
4364{
4365 struct http_txn *txn = &s->txn;
4366 struct http_msg *msg = &s->txn.rsp;
4367
Willy Tarreau21c5e4d2010-01-03 00:19:31 +0100[diff] [blame]4368 if (res->flags & (BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) {
Willy Tarreau082b01c2010-01-02 23:58:04 +0100[diff] [blame]4369 res->analysers &= ~an_bit;
4370 return 1;
4371 }
4372
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4373 if (unlikely(msg->msg_state < HTTP_MSG_BODY))
4374 return 0;
4375
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4376 /* note: in server-close mode, we don't want to automatically close the
4377 * output when the input is closed.
4378 */
4379 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
4380 buffer_dont_close(res);
4381
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4382 if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
4383 /* we have msg->col and msg->sov which both point to the first
4384 * byte of message body. msg->som still points to the beginning
4385 * of the message. We must save the body in req->lr because it
4386 * survives buffer re-alignments.
4387 */
4388 res->lr = res->data + msg->sov;
4389 if (txn->flags & TX_RES_TE_CHNK)
4390 msg->msg_state = HTTP_MSG_CHUNK_SIZE;
4391 else {
4392 msg->msg_state = HTTP_MSG_DATA;
4393 }
4394 }
4395
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4396 while (1) {
Willy Tarreau638cd022010-01-03 07:42:04 +0100[diff] [blame]4397 /* we may have some data pending */
4398 if (msg->hdr_content_len || msg->som != msg->sov) {
4399 int bytes = msg->sov - msg->som;
4400 if (bytes < 0) /* sov may have wrapped at the end */
4401 bytes += res->size;
4402 buffer_forward(res, bytes + msg->hdr_content_len);
4403 msg->hdr_content_len = 0; /* don't forward that again */
4404 msg->som = msg->sov;
4405 }
4406
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4407 if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
4408 /* read the chunk size and assign it to ->hdr_content_len, then
4409 * set ->sov to point to the body and switch to DATA or TRAILERS state.
4410 */
4411 int ret = http_parse_chunk_size(res, msg);
4412
4413 if (!ret)
4414 goto missing_data;
4415 else if (ret < 0)
4416 goto return_bad_res;
4417 /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4418 }
4419 else if (msg->msg_state == HTTP_MSG_DATA) {
4420 /* must still forward */
4421 if (res->to_forward)
4422 return 0;
4423
4424 /* nothing left to forward */
4425 if (txn->flags & TX_RES_TE_CHNK)
4426 msg->msg_state = HTTP_MSG_DATA_CRLF;
4427 else {
4428 msg->msg_state = HTTP_MSG_DONE;
4429 }
4430 }
4431 else if (msg->msg_state == HTTP_MSG_DATA_CRLF) {
4432 /* we want the CRLF after the data */
4433 int ret;
4434
4435 if (!(res->flags & BF_OUT_EMPTY))
4436 return 0;
4437 /* The output pointer does not move anymore, next unsent data
4438 * are available at ->w. Let's save that.
4439 */
4440 res->lr = res->w;
4441 ret = http_skip_chunk_crlf(res, msg);
4442
4443 if (!ret)
4444 goto missing_data;
4445 else if (ret < 0)
4446 goto return_bad_res;
4447 /* we're in MSG_CHUNK_SIZE now */
4448 }
4449 else if (msg->msg_state == HTTP_MSG_TRAILERS) {
4450 int ret = http_forward_trailers(res, msg);
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4451
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4452 if (ret == 0)
4453 goto missing_data;
4454 else if (ret < 0)
4455 goto return_bad_res;
4456 /* we're in HTTP_MSG_DONE now */
4457 }
4458 else if (msg->msg_state == HTTP_MSG_DONE) {
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4459 /* In theory, we don't need to read anymore, but we must
4460 * still monitor the server connection for a possible close,
4461 * so we don't set the BF_DONT_READ flag here.
4462 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4463
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4464 if (txn->req.msg_state < HTTP_MSG_DONE && txn->req.msg_state != HTTP_MSG_ERROR) {
4465 /* The client seems to still be sending data, probably
4466 * because we got an error response during an upload.
4467 * We have the choice of either breaking the connection
4468 * or letting it pass through. Let's do the later.
4469 */
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4470 return 0;
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4471 }
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4472
4473 /* when we support keep-alive or server-close modes, we'll have
4474 * to reset the transaction here.
4475 */
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4476
Willy Tarreau82eeaf22009-12-29 12:09:05 +0100[diff] [blame]4477 if ((s->fe->options | s->be->options) & PR_O_FORCE_CLO) {
4478 /* option forceclose is set, let's enforce it now that the transfer is complete. */
4479 buffer_abort(res);
4480 }
Willy Tarreaub608feb2010-01-02 22:47:18 +0100[diff] [blame]4481 else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
4482 /* server close is handled entirely on the req analyser */
4483 s->req->cons->flags |= SI_FL_NOLINGER;
4484 buffer_shutw_now(s->req);
4485 }
Willy Tarreau82eeaf22009-12-29 12:09:05 +0100[diff] [blame]4486
Willy Tarreau5523b322009-12-29 12:05:52 +0100[diff] [blame]4487 if (res->flags & (BF_SHUTW|BF_SHUTW_NOW)) {
4488 if (res->flags & BF_OUT_EMPTY)
4489 msg->msg_state = HTTP_MSG_CLOSED;
4490 else
4491 msg->msg_state = HTTP_MSG_CLOSING;
4492 }
4493 else {
4494 /* for other modes, we let further responses pass for now */
4495 res->flags &= ~BF_DONT_READ;
4496 /* FIXME: we're still forced to do that here */
4497 s->req->flags &= ~BF_DONT_READ;
4498 break;
4499 }
4500 }
4501 else if (msg->msg_state == HTTP_MSG_CLOSING) {
4502 /* nothing else to forward, just waiting for the buffer to be empty */
4503 if (!(res->flags & BF_OUT_EMPTY))
4504 return 0;
4505 msg->msg_state = HTTP_MSG_CLOSED;
4506 }
4507 else if (msg->msg_state == HTTP_MSG_CLOSED) {
4508 res->flags &= ~BF_DONT_READ;
4509 /* FIXME: we're still forced to do that here */
4510 s->req->flags &= ~BF_DONT_READ;
Willy Tarreaud98cf932009-12-27 22:54:55 +0100[diff] [blame]4511 break;
4512 }
4513 }
4514
4515 res->analysers &= ~an_bit;
4516 return 1;
4517
4518 missing_data:
4519 /* forward the chunk size as well as any pending data */
4520 if (msg->hdr_content_len || msg->som != msg->sov) {
4521 buffer_forward(res, msg->sov - msg->som + msg->hdr_content_len);
4522 msg->hdr_content_len = 0; /* don't forward that again */
4523 msg->som = msg->sov;
4524 }
4525
4526 if (res->flags & BF_FULL)
4527 goto return_bad_res;
4528 /* the session handler will take care of timeouts and errors */
4529 return 0;
4530
4531 return_bad_res: /* let's centralize all bad resuests */
4532 txn->rsp.msg_state = HTTP_MSG_ERROR;
4533 txn->status = 502;
4534 stream_int_cond_close(res->cons, NULL);
4535
4536 res->analysers = 0;
4537 s->be->counters.failed_resp++;
4538 if (s->srv) {
4539 s->srv->counters.failed_resp++;
4540 health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP);
4541 }
4542
4543 if (!(s->flags & SN_ERR_MASK))
4544 s->flags |= SN_ERR_PRXCOND;
4545 if (!(s->flags & SN_FINST_MASK))
4546 s->flags |= SN_FINST_R;
4547 return 0;
4548}
4549
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4550/* Iterate the same filter through all request headers.
4551 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4552 * Since it can manage the switch to another backend, it updates the per-proxy
4553 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4554 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4555int 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]4556{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4557 char term;
4558 char *cur_ptr, *cur_end, *cur_next;
4559 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4560 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4561 struct hdr_idx_elem *cur_hdr;
4562 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]4563
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4564 last_hdr = 0;
4565
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4566 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4567 old_idx = 0;
4568
4569 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4570 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4571 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4572 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4573 (exp->action == ACT_ALLOW ||
4574 exp->action == ACT_DENY ||
4575 exp->action == ACT_TARPIT))
4576 return 0;
4577
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4578 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4579 if (!cur_idx)
4580 break;
4581
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4582 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4583 cur_ptr = cur_next;
4584 cur_end = cur_ptr + cur_hdr->len;
4585 cur_next = cur_end + cur_hdr->cr + 1;
4586
4587 /* Now we have one header between cur_ptr and cur_end,
4588 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4589 */
4590
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4591 /* The annoying part is that pattern matching needs
4592 * that we modify the contents to null-terminate all
4593 * strings before testing them.
4594 */
4595
4596 term = *cur_end;
4597 *cur_end = '\0';
4598
4599 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
4600 switch (exp->action) {
4601 case ACT_SETBE:
4602 /* It is not possible to jump a second time.
4603 * FIXME: should we return an HTTP/500 here so that
4604 * the admin knows there's a problem ?
4605 */
4606 if (t->be != t->fe)
4607 break;
4608
4609 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]4610 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4611 last_hdr = 1;
4612 break;
4613
4614 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4615 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4616 last_hdr = 1;
4617 break;
4618
4619 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4620 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4621 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4622
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4623 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4624 if (t->listener->counters)
4625 t->listener->counters->denied_resp++;
4626
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4627 break;
4628
4629 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4630 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4631 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4632
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4633 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4634 if (t->listener->counters)
4635 t->listener->counters->denied_resp++;
4636
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4637 break;
4638
4639 case ACT_REPLACE:
4640 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
4641 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
4642 /* FIXME: if the user adds a newline in the replacement, the
4643 * index will not be recalculated for now, and the new line
4644 * will not be counted as a new header.
4645 */
4646
4647 cur_end += delta;
4648 cur_next += delta;
4649 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]4650 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4651 break;
4652
4653 case ACT_REMOVE:
4654 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
4655 cur_next += delta;
4656
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]4657 http_msg_move_end(&txn->req, delta);
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4658 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
4659 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4660 cur_hdr->len = 0;
4661 cur_end = NULL; /* null-term has been rewritten */
4662 break;
4663
4664 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4665 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4666 if (cur_end)
4667 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4668
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4669 /* keep the link from this header to next one in case of later
4670 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4671 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4672 old_idx = cur_idx;
4673 }
4674 return 0;
4675}
4676
4677
4678/* Apply the filter to the request line.
4679 * Returns 0 if nothing has been done, 1 if the filter has been applied,
4680 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4681 * Since it can manage the switch to another backend, it updates the per-proxy
4682 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4683 */
4684int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
4685{
4686 char term;
4687 char *cur_ptr, *cur_end;
4688 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4689 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4690 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4691
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4692
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4693 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4694 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4695 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4696 (exp->action == ACT_ALLOW ||
4697 exp->action == ACT_DENY ||
4698 exp->action == ACT_TARPIT))
4699 return 0;
4700 else if (exp->action == ACT_REMOVE)
4701 return 0;
4702
4703 done = 0;
4704
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]4705 cur_ptr = req->data + txn->req.som; /* should be equal to txn->sol */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4706 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4707
4708 /* Now we have the request line between cur_ptr and cur_end */
4709
4710 /* The annoying part is that pattern matching needs
4711 * that we modify the contents to null-terminate all
4712 * strings before testing them.
4713 */
4714
4715 term = *cur_end;
4716 *cur_end = '\0';
4717
4718 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
4719 switch (exp->action) {
4720 case ACT_SETBE:
4721 /* It is not possible to jump a second time.
4722 * FIXME: should we return an HTTP/500 here so that
4723 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4724 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4725 if (t->be != t->fe)
4726 break;
4727
4728 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]4729 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4730 done = 1;
4731 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4732
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4733 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4734 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4735 done = 1;
4736 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]4737
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4738 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4739 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4740
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4741 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4742 if (t->listener->counters)
4743 t->listener->counters->denied_resp++;
4744
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4745 done = 1;
4746 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]4747
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4748 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4749 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4750
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]4751 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]4752 if (t->listener->counters)
4753 t->listener->counters->denied_resp++;
4754
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4755 done = 1;
4756 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]4757
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4758 case ACT_REPLACE:
4759 *cur_end = term; /* restore the string terminator */
4760 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
4761 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
4762 /* FIXME: if the user adds a newline in the replacement, the
4763 * index will not be recalculated for now, and the new line
4764 * will not be counted as a new header.
4765 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]4766
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]4767 http_msg_move_end(&txn->req, delta);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4768 cur_end += delta;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]4769
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]4770 txn->req.sol = req->data + txn->req.som; /* should be equal to txn->sol */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4771 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4772 HTTP_MSG_RQMETH,
4773 cur_ptr, cur_end + 1,
4774 NULL, NULL);
4775 if (unlikely(!cur_end))
4776 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]4777
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4778 /* we have a full request and we know that we have either a CR
4779 * or an LF at <ptr>.
4780 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4781 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
4782 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]4783 /* there is no point trying this regex on headers */
4784 return 1;
4785 }
4786 }
4787 *cur_end = term; /* restore the string terminator */
4788 return done;
4789}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]4790
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4791
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4792
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4793/*
4794 * Apply all the req filters <exp> to all headers in buffer <req> of session <t>.
4795 * 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]4796 * unparsable request. Since it can manage the switch to another backend, it
4797 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4798 */
4799int apply_filters_to_request(struct session *t, struct buffer *req, struct hdr_exp *exp)
4800{
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4801 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4802 /* iterate through the filters in the outer loop */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4803 while (exp && !(txn->flags & (TX_CLDENY|TX_CLTARPIT))) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4804 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4805
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4806 /*
4807 * The interleaving of transformations and verdicts
4808 * makes it difficult to decide to continue or stop
4809 * the evaluation.
4810 */
4811
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4812 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4813 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
4814 exp->action == ACT_TARPIT || exp->action == ACT_PASS)) {
4815 exp = exp->next;
4816 continue;
4817 }
4818
4819 /* Apply the filter to the request line. */
4820 ret = apply_filter_to_req_line(t, req, exp);
4821 if (unlikely(ret < 0))
4822 return -1;
4823
4824 if (likely(ret == 0)) {
4825 /* The filter did not match the request, it can be
4826 * iterated through all headers.
4827 */
4828 apply_filter_to_req_headers(t, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4829 }
4830 exp = exp->next;
4831 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4832 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4833}
4834
4835
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4836
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4837/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4838 * Try to retrieve the server associated to the appsession.
4839 * If the server is found, it's assigned to the session.
4840 */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]4841void manage_client_side_appsession(struct session *t, const char *buf, int len) {
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4842 struct http_txn *txn = &t->txn;
4843 appsess *asession = NULL;
4844 char *sessid_temp = NULL;
4845
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]4846 if (len > t->be->appsession_len) {
4847 len = t->be->appsession_len;
4848 }
4849
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4850 if (t->be->options2 & PR_O2_AS_REQL) {
4851 /* request-learn option is enabled : store the sessid in the session for future use */
4852 if (t->sessid != NULL) {
4853 /* free previously allocated memory as we don't need the session id found in the URL anymore */
4854 pool_free2(apools.sessid, t->sessid);
4855 }
4856
4857 if ((t->sessid = pool_alloc2(apools.sessid)) == NULL) {
4858 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
4859 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
4860 return;
4861 }
4862
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]4863 memcpy(t->sessid, buf, len);
4864 t->sessid[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4865 }
4866
4867 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
4868 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
4869 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
4870 return;
4871 }
4872
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]4873 memcpy(sessid_temp, buf, len);
4874 sessid_temp[len] = 0;
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4875
4876 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
4877 /* free previously allocated memory */
4878 pool_free2(apools.sessid, sessid_temp);
4879
4880 if (asession != NULL) {
4881 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
4882 if (!(t->be->options2 & PR_O2_AS_REQL))
4883 asession->request_count++;
4884
4885 if (asession->serverid != NULL) {
4886 struct server *srv = t->be->srv;
4887 while (srv) {
4888 if (strcmp(srv->id, asession->serverid) == 0) {
4889 if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
4890 /* we found the server and it's usable */
4891 txn->flags &= ~TX_CK_MASK;
4892 txn->flags |= TX_CK_VALID;
4893 t->flags |= SN_DIRECT | SN_ASSIGNED;
4894 t->srv = srv;
4895 break;
4896 } else {
4897 txn->flags &= ~TX_CK_MASK;
4898 txn->flags |= TX_CK_DOWN;
4899 }
4900 }
4901 srv = srv->next;
4902 }
4903 }
4904 }
4905}
4906
4907/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]4908 * Manage client-side cookie. It can impact performance by about 2% so it is
4909 * desirable to call it only when needed.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4910 */
4911void manage_client_side_cookies(struct session *t, struct buffer *req)
4912{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4913 struct http_txn *txn = &t->txn;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4914 char *p1, *p2, *p3, *p4;
4915 char *del_colon, *del_cookie, *colon;
4916 int app_cookies;
4917
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4918 char *cur_ptr, *cur_end, *cur_next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4919 int cur_idx, old_idx;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4920
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]4921 /* Iterate through the headers.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4922 * we start with the start line.
4923 */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]4924 old_idx = 0;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4925 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4926
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4927 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4928 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4929 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4930
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4931 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4932 cur_ptr = cur_next;
4933 cur_end = cur_ptr + cur_hdr->len;
4934 cur_next = cur_end + cur_hdr->cr + 1;
4935
4936 /* We have one full header between cur_ptr and cur_end, and the
4937 * next header starts at cur_next. We're only interested in
4938 * "Cookie:" headers.
4939 */
4940
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4941 val = http_header_match2(cur_ptr, cur_end, "Cookie", 6);
4942 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4943 old_idx = cur_idx;
4944 continue;
4945 }
4946
4947 /* Now look for cookies. Conforming to RFC2109, we have to support
4948 * attributes whose name begin with a '$', and associate them with
4949 * the right cookie, if we want to delete this cookie.
4950 * So there are 3 cases for each cookie read :
4951 * 1) it's a special attribute, beginning with a '$' : ignore it.
4952 * 2) it's a server id cookie that we *MAY* want to delete : save
4953 * some pointers on it (last semi-colon, beginning of cookie...)
4954 * 3) it's an application cookie : we *MAY* have to delete a previous
4955 * "special" cookie.
4956 * At the end of loop, if a "special" cookie remains, we may have to
4957 * remove it. If no application cookie persists in the header, we
4958 * *MUST* delete it
4959 */
4960
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4961 colon = p1 = cur_ptr + val; /* first non-space char after 'Cookie:' */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4962
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4963 /* del_cookie == NULL => nothing to be deleted */
4964 del_colon = del_cookie = NULL;
4965 app_cookies = 0;
4966
4967 while (p1 < cur_end) {
4968 /* skip spaces and colons, but keep an eye on these ones */
4969 while (p1 < cur_end) {
4970 if (*p1 == ';' || *p1 == ',')
4971 colon = p1;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]4972 else if (!isspace((unsigned char)*p1))
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4973 break;
4974 p1++;
4975 }
4976
4977 if (p1 == cur_end)
4978 break;
4979
4980 /* p1 is at the beginning of the cookie name */
4981 p2 = p1;
4982 while (p2 < cur_end && *p2 != '=')
4983 p2++;
4984
4985 if (p2 == cur_end)
4986 break;
4987
4988 p3 = p2 + 1; /* skips the '=' sign */
4989 if (p3 == cur_end)
4990 break;
4991
4992 p4 = p3;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]4993 while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';' && *p4 != ',')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4994 p4++;
4995
4996 /* here, we have the cookie name between p1 and p2,
4997 * and its value between p3 and p4.
4998 * we can process it :
4999 *
5000 * Cookie: NAME=VALUE;
5001 * | || || |
5002 * | || || +--> p4
5003 * | || |+-------> p3
5004 * | || +--------> p2
5005 * | |+------------> p1
5006 * | +-------------> colon
5007 * +--------------------> cur_ptr
5008 */
5009
5010 if (*p1 == '$') {
5011 /* skip this one */
5012 }
5013 else {
5014 /* first, let's see if we want to capture it */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5015 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5016 txn->cli_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5017 (p4 - p1 >= t->fe->capture_namelen) &&
5018 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5019 int log_len = p4 - p1;
5020
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]5021 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5022 Alert("HTTP logging : out of memory.\n");
5023 } else {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5024 if (log_len > t->fe->capture_len)
5025 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5026 memcpy(txn->cli_cookie, p1, log_len);
5027 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5028 }
5029 }
5030
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5031 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
5032 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5033 /* Cool... it's the right one */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5034 struct server *srv = t->be->srv;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5035 char *delim;
5036
5037 /* if we're in cookie prefix mode, we'll search the delimitor so that we
5038 * have the server ID betweek p3 and delim, and the original cookie between
5039 * delim+1 and p4. Otherwise, delim==p4 :
5040 *
5041 * Cookie: NAME=SRV~VALUE;
5042 * | || || | |
5043 * | || || | +--> p4
5044 * | || || +--------> delim
5045 * | || |+-----------> p3
5046 * | || +------------> p2
5047 * | |+----------------> p1
5048 * | +-----------------> colon
5049 * +------------------------> cur_ptr
5050 */
5051
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5052 if (t->be->options & PR_O_COOK_PFX) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5053 for (delim = p3; delim < p4; delim++)
5054 if (*delim == COOKIE_DELIM)
5055 break;
5056 }
5057 else
5058 delim = p4;
5059
5060
5061 /* Here, we'll look for the first running server which supports the cookie.
5062 * This allows to share a same cookie between several servers, for example
5063 * to dedicate backup servers to specific servers only.
5064 * However, to prevent clients from sticking to cookie-less backup server
5065 * when they have incidentely learned an empty cookie, we simply ignore
5066 * empty cookies and mark them as invalid.
5067 */
5068 if (delim == p3)
5069 srv = NULL;
5070
5071 while (srv) {
Willy Tarreau92f2ab12007-02-02 22:14:47 +0100[diff] [blame]5072 if (srv->cookie && (srv->cklen == delim - p3) &&
5073 !memcmp(p3, srv->cookie, delim - p3)) {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5074 if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5075 /* we found the server and it's usable */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5076 txn->flags &= ~TX_CK_MASK;
5077 txn->flags |= TX_CK_VALID;
5078 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5079 t->srv = srv;
5080 break;
5081 } else {
5082 /* we found a server, but it's down */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5083 txn->flags &= ~TX_CK_MASK;
5084 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5085 }
5086 }
5087 srv = srv->next;
5088 }
5089
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5090 if (!srv && !(txn->flags & TX_CK_DOWN)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5091 /* no server matched this cookie */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5092 txn->flags &= ~TX_CK_MASK;
5093 txn->flags |= TX_CK_INVALID;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5094 }
5095
5096 /* depending on the cookie mode, we may have to either :
5097 * - delete the complete cookie if we're in insert+indirect mode, so that
5098 * the server never sees it ;
5099 * - remove the server id from the cookie value, and tag the cookie as an
5100 * application cookie so that it does not get accidentely removed later,
5101 * if we're in cookie prefix mode
5102 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5103 if ((t->be->options & PR_O_COOK_PFX) && (delim != p4)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5104 int delta; /* negative */
5105
5106 delta = buffer_replace2(req, p3, delim + 1, NULL, 0);
5107 p4 += delta;
5108 cur_end += delta;
5109 cur_next += delta;
5110 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5111 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5112
5113 del_cookie = del_colon = NULL;
5114 app_cookies++; /* protect the header from deletion */
5115 }
5116 else if (del_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5117 (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]5118 del_cookie = p1;
5119 del_colon = colon;
5120 }
5121 } else {
5122 /* now we know that we must keep this cookie since it's
5123 * not ours. But if we wanted to delete our cookie
5124 * earlier, we cannot remove the complete header, but we
5125 * can remove the previous block itself.
5126 */
5127 app_cookies++;
5128
5129 if (del_cookie != NULL) {
5130 int delta; /* negative */
5131
5132 delta = buffer_replace2(req, del_cookie, p1, NULL, 0);
5133 p4 += delta;
5134 cur_end += delta;
5135 cur_next += delta;
5136 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5137 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5138 del_cookie = del_colon = NULL;
5139 }
5140 }
5141
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5142 if (t->be->appsession_name != NULL) {
5143 int cmp_len, value_len;
5144 char *value_begin;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]5145
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5146 if (t->be->options2 & PR_O2_AS_PFX) {
5147 cmp_len = MIN(p4 - p1, t->be->appsession_name_len);
5148 value_begin = p1 + t->be->appsession_name_len;
5149 value_len = p4 - p1 - t->be->appsession_name_len;
5150 } else {
5151 cmp_len = p2 - p1;
5152 value_begin = p3;
5153 value_len = p4 - p3;
5154 }
5155
5156 /* let's see if the cookie is our appcookie */
5157 if (memcmp(p1, t->be->appsession_name, cmp_len) == 0) {
5158 /* Cool... it's the right one */
5159 manage_client_side_appsession(t, value_begin, value_len);
5160 }
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]5161#if defined(DEBUG_HASH)
5162 Alert("manage_client_side_cookies\n");
5163 appsession_hash_dump(&(t->be->htbl_proxy));
5164#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5165 }/* end if ((t->proxy->appsession_name != NULL) ... */
5166 }
5167
5168 /* we'll have to look for another cookie ... */
5169 p1 = p4;
5170 } /* while (p1 < cur_end) */
5171
5172 /* There's no more cookie on this line.
5173 * We may have marked the last one(s) for deletion.
5174 * We must do this now in two ways :
5175 * - if there is no app cookie, we simply delete the header ;
5176 * - if there are app cookies, we must delete the end of the
5177 * string properly, including the colon/semi-colon before
5178 * the cookie name.
5179 */
5180 if (del_cookie != NULL) {
5181 int delta;
5182 if (app_cookies) {
5183 delta = buffer_replace2(req, del_colon, cur_end, NULL, 0);
5184 cur_end = del_colon;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5185 cur_hdr->len += delta;
5186 } else {
5187 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5188
5189 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5190 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5191 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5192 cur_hdr->len = 0;
5193 }
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]5194 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5195 http_msg_move_end(&txn->req, delta);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5196 }
5197
5198 /* keep the link from this header to next one */
5199 old_idx = cur_idx;
5200 } /* end of cookie processing on this header */
5201}
5202
5203
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5204/* Iterate the same filter through all response headers contained in <rtr>.
5205 * Returns 1 if this filter can be stopped upon return, otherwise 0.
5206 */
5207int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
5208{
5209 char term;
5210 char *cur_ptr, *cur_end, *cur_next;
5211 int cur_idx, old_idx, last_hdr;
5212 struct http_txn *txn = &t->txn;
5213 struct hdr_idx_elem *cur_hdr;
5214 int len, delta;
5215
5216 last_hdr = 0;
5217
5218 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
5219 old_idx = 0;
5220
5221 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5222 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5223 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5224 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5225 (exp->action == ACT_ALLOW ||
5226 exp->action == ACT_DENY))
5227 return 0;
5228
5229 cur_idx = txn->hdr_idx.v[old_idx].next;
5230 if (!cur_idx)
5231 break;
5232
5233 cur_hdr = &txn->hdr_idx.v[cur_idx];
5234 cur_ptr = cur_next;
5235 cur_end = cur_ptr + cur_hdr->len;
5236 cur_next = cur_end + cur_hdr->cr + 1;
5237
5238 /* Now we have one header between cur_ptr and cur_end,
5239 * and the next header starts at cur_next.
5240 */
5241
5242 /* The annoying part is that pattern matching needs
5243 * that we modify the contents to null-terminate all
5244 * strings before testing them.
5245 */
5246
5247 term = *cur_end;
5248 *cur_end = '\0';
5249
5250 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5251 switch (exp->action) {
5252 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5253 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5254 last_hdr = 1;
5255 break;
5256
5257 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5258 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5259 last_hdr = 1;
5260 break;
5261
5262 case ACT_REPLACE:
5263 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5264 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
5265 /* FIXME: if the user adds a newline in the replacement, the
5266 * index will not be recalculated for now, and the new line
5267 * will not be counted as a new header.
5268 */
5269
5270 cur_end += delta;
5271 cur_next += delta;
5272 cur_hdr->len += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5273 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5274 break;
5275
5276 case ACT_REMOVE:
5277 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
5278 cur_next += delta;
5279
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5280 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5281 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5282 txn->hdr_idx.used--;
5283 cur_hdr->len = 0;
5284 cur_end = NULL; /* null-term has been rewritten */
5285 break;
5286
5287 }
5288 }
5289 if (cur_end)
5290 *cur_end = term; /* restore the string terminator */
5291
5292 /* keep the link from this header to next one in case of later
5293 * removal of next header.
5294 */
5295 old_idx = cur_idx;
5296 }
5297 return 0;
5298}
5299
5300
5301/* Apply the filter to the status line in the response buffer <rtr>.
5302 * Returns 0 if nothing has been done, 1 if the filter has been applied,
5303 * or -1 if a replacement resulted in an invalid status line.
5304 */
5305int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
5306{
5307 char term;
5308 char *cur_ptr, *cur_end;
5309 int done;
5310 struct http_txn *txn = &t->txn;
5311 int len, delta;
5312
5313
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5314 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5315 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5316 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5317 (exp->action == ACT_ALLOW ||
5318 exp->action == ACT_DENY))
5319 return 0;
5320 else if (exp->action == ACT_REMOVE)
5321 return 0;
5322
5323 done = 0;
5324
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]5325 cur_ptr = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5326 cur_end = cur_ptr + txn->rsp.sl.rq.l;
5327
5328 /* Now we have the status line between cur_ptr and cur_end */
5329
5330 /* The annoying part is that pattern matching needs
5331 * that we modify the contents to null-terminate all
5332 * strings before testing them.
5333 */
5334
5335 term = *cur_end;
5336 *cur_end = '\0';
5337
5338 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
5339 switch (exp->action) {
5340 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5341 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5342 done = 1;
5343 break;
5344
5345 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5346 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5347 done = 1;
5348 break;
5349
5350 case ACT_REPLACE:
5351 *cur_end = term; /* restore the string terminator */
5352 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
5353 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
5354 /* FIXME: if the user adds a newline in the replacement, the
5355 * index will not be recalculated for now, and the new line
5356 * will not be counted as a new header.
5357 */
5358
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5359 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5360 cur_end += delta;
5361
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]5362 txn->rsp.sol = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5363 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]5364 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5365 cur_ptr, cur_end + 1,
5366 NULL, NULL);
5367 if (unlikely(!cur_end))
5368 return -1;
5369
5370 /* we have a full respnse and we know that we have either a CR
5371 * or an LF at <ptr>.
5372 */
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5373 txn->status = strl2ui(rtr->data + txn->rsp.sl.st.c, txn->rsp.sl.st.c_l);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5374 hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.rq.l, *cur_end == '\r');
5375 /* there is no point trying this regex on headers */
5376 return 1;
5377 }
5378 }
5379 *cur_end = term; /* restore the string terminator */
5380 return done;
5381}
5382
5383
5384
5385/*
5386 * Apply all the resp filters <exp> to all headers in buffer <rtr> of session <t>.
5387 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
5388 * unparsable response.
5389 */
5390int apply_filters_to_response(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
5391{
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5392 struct http_txn *txn = &t->txn;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5393 /* iterate through the filters in the outer loop */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5394 while (exp && !(txn->flags & TX_SVDENY)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5395 int ret;
5396
5397 /*
5398 * The interleaving of transformations and verdicts
5399 * makes it difficult to decide to continue or stop
5400 * the evaluation.
5401 */
5402
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5403 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5404 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
5405 exp->action == ACT_PASS)) {
5406 exp = exp->next;
5407 continue;
5408 }
5409
5410 /* Apply the filter to the status line. */
5411 ret = apply_filter_to_sts_line(t, rtr, exp);
5412 if (unlikely(ret < 0))
5413 return -1;
5414
5415 if (likely(ret == 0)) {
5416 /* The filter did not match the response, it can be
5417 * iterated through all headers.
5418 */
5419 apply_filter_to_resp_headers(t, rtr, exp);
5420 }
5421 exp = exp->next;
5422 }
5423 return 0;
5424}
5425
5426
5427
5428/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]5429 * Manage server-side cookies. It can impact performance by about 2% so it is
5430 * desirable to call it only when needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5431 */
5432void manage_server_side_cookies(struct session *t, struct buffer *rtr)
5433{
5434 struct http_txn *txn = &t->txn;
5435 char *p1, *p2, *p3, *p4;
5436
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5437 char *cur_ptr, *cur_end, *cur_next;
5438 int cur_idx, old_idx, delta;
5439
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5440 /* Iterate through the headers.
5441 * we start with the start line.
5442 */
5443 old_idx = 0;
5444 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
5445
5446 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
5447 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5448 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5449
5450 cur_hdr = &txn->hdr_idx.v[cur_idx];
5451 cur_ptr = cur_next;
5452 cur_end = cur_ptr + cur_hdr->len;
5453 cur_next = cur_end + cur_hdr->cr + 1;
5454
5455 /* We have one full header between cur_ptr and cur_end, and the
5456 * next header starts at cur_next. We're only interested in
5457 * "Cookie:" headers.
5458 */
5459
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5460 val = http_header_match2(cur_ptr, cur_end, "Set-Cookie", 10);
5461 if (!val) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5462 old_idx = cur_idx;
5463 continue;
5464 }
5465
5466 /* OK, right now we know we have a set-cookie at cur_ptr */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5467 txn->flags |= TX_SCK_ANY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5468
5469
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]5470 /* maybe we only wanted to see if there was a set-cookie. Note that
5471 * the cookie capture is declared in the fronend.
5472 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5473 if (t->be->cookie_name == NULL &&
5474 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]5475 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5476 return;
5477
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5478 p1 = cur_ptr + val; /* first non-space char after 'Set-Cookie:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5479
5480 while (p1 < cur_end) { /* in fact, we'll break after the first cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5481 if (p1 == cur_end || *p1 == ';') /* end of cookie */
5482 break;
5483
5484 /* p1 is at the beginning of the cookie name */
5485 p2 = p1;
5486
5487 while (p2 < cur_end && *p2 != '=' && *p2 != ';')
5488 p2++;
5489
5490 if (p2 == cur_end || *p2 == ';') /* next cookie */
5491 break;
5492
5493 p3 = p2 + 1; /* skip the '=' sign */
5494 if (p3 == cur_end)
5495 break;
5496
5497 p4 = p3;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]5498 while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';')
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5499 p4++;
5500
5501 /* here, we have the cookie name between p1 and p2,
5502 * and its value between p3 and p4.
5503 * we can process it.
5504 */
5505
5506 /* first, let's see if we want to capture it */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]5507 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5508 txn->srv_cookie == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]5509 (p4 - p1 >= t->fe->capture_namelen) &&
5510 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5511 int log_len = p4 - p1;
5512
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]5513 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5514 Alert("HTTP logging : out of memory.\n");
5515 }
5516
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]5517 if (log_len > t->fe->capture_len)
5518 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5519 memcpy(txn->srv_cookie, p1, log_len);
5520 txn->srv_cookie[log_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5521 }
5522
5523 /* now check if we need to process it for persistence */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5524 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
5525 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5526 /* Cool... it's the right one */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5527 txn->flags |= TX_SCK_SEEN;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5528
5529 /* If the cookie is in insert mode on a known server, we'll delete
5530 * this occurrence because we'll insert another one later.
5531 * We'll delete it too if the "indirect" option is set and we're in
5532 * a direct access. */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5533 if (((t->srv) && (t->be->options & PR_O_COOK_INS)) ||
5534 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5535 /* this header must be deleted */
5536 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
5537 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
5538 txn->hdr_idx.used--;
5539 cur_hdr->len = 0;
5540 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5541 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5542
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5543 txn->flags |= TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5544 }
5545 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5546 (t->be->options & PR_O_COOK_RW)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5547 /* replace bytes p3->p4 with the cookie name associated
5548 * with this server since we know it.
5549 */
5550 delta = buffer_replace2(rtr, p3, p4, t->srv->cookie, t->srv->cklen);
5551 cur_hdr->len += delta;
5552 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5553 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5554
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5555 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5556 }
5557 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5558 (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5559 /* insert the cookie name associated with this server
5560 * before existing cookie, and insert a delimitor between them..
5561 */
5562 delta = buffer_replace2(rtr, p3, p3, t->srv->cookie, t->srv->cklen + 1);
5563 cur_hdr->len += delta;
5564 cur_next += delta;
Willy Tarreaufa355d42009-11-29 18:12:29 +0100[diff] [blame]5565 http_msg_move_end(&txn->rsp, delta);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5566
5567 p3[t->srv->cklen] = COOKIE_DELIM;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5568 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5569 }
5570 }
5571 /* next, let's see if the cookie is our appcookie */
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5572 else if (t->be->appsession_name != NULL) {
5573 int cmp_len, value_len;
5574 char *value_begin;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5575
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5576 if (t->be->options2 & PR_O2_AS_PFX) {
5577 cmp_len = MIN(p4 - p1, t->be->appsession_name_len);
5578 value_begin = p1 + t->be->appsession_name_len;
5579 value_len = MIN(t->be->appsession_len, p4 - p1 - t->be->appsession_name_len);
5580 } else {
5581 cmp_len = p2 - p1;
5582 value_begin = p3;
5583 value_len = MIN(t->be->appsession_len, p4 - p3);
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5584 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5585
5586 if (memcmp(p1, t->be->appsession_name, cmp_len) == 0) {
5587 /* Cool... it's the right one */
5588 if (t->sessid != NULL) {
5589 /* free previously allocated memory as we don't need it anymore */
5590 pool_free2(apools.sessid, t->sessid);
5591 }
5592 /* Store the sessid in the session for future use */
5593 if ((t->sessid = pool_alloc2(apools.sessid)) == NULL) {
5594 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
5595 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
5596 return;
5597 }
5598 memcpy(t->sessid, value_begin, value_len);
5599 t->sessid[value_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5600 }
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5601 } /* end if ((t->be->appsession_name != NULL) ... */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5602 break; /* we don't want to loop again since there cannot be another cookie on the same line */
5603 } /* we're now at the end of the cookie value */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5604 /* keep the link from this header to next one */
5605 old_idx = cur_idx;
5606 } /* end of cookie processing on this header */
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]5607
5608 if (t->sessid != NULL) {
5609 appsess *asession = NULL;
5610 /* only do insert, if lookup fails */
5611 asession = appsession_hash_lookup(&(t->be->htbl_proxy), t->sessid);
5612 if (asession == NULL) {
5613 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
5614 Alert("Not enough Memory process_srv():asession:calloc().\n");
5615 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
5616 return;
5617 }
5618 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
5619 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
5620 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
5621 return;
5622 }
5623 memcpy(asession->sessid, t->sessid, t->be->appsession_len);
5624 asession->sessid[t->be->appsession_len] = 0;
5625
5626 size_t server_id_len = strlen(t->srv->id) + 1;
5627 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
5628 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
5629 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
5630 return;
5631 }
5632 asession->serverid[0] = '\0';
5633 memcpy(asession->serverid, t->srv->id, server_id_len);
5634
5635 asession->request_count = 0;
5636 appsession_hash_insert(&(t->be->htbl_proxy), asession);
5637 }
5638
5639 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
5640 asession->request_count++;
5641 }
5642
5643#if defined(DEBUG_HASH)
5644 Alert("manage_server_side_cookies\n");
5645 appsession_hash_dump(&(t->be->htbl_proxy));
5646#endif
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5647}
5648
5649
5650
5651/*
5652 * Check if response is cacheable or not. Updates t->flags.
5653 */
5654void check_response_for_cacheability(struct session *t, struct buffer *rtr)
5655{
5656 struct http_txn *txn = &t->txn;
5657 char *p1, *p2;
5658
5659 char *cur_ptr, *cur_end, *cur_next;
5660 int cur_idx;
5661
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]5662 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5663 return;
5664
5665 /* Iterate through the headers.
5666 * we start with the start line.
5667 */
5668 cur_idx = 0;
5669 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
5670
5671 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
5672 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5673 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5674
5675 cur_hdr = &txn->hdr_idx.v[cur_idx];
5676 cur_ptr = cur_next;
5677 cur_end = cur_ptr + cur_hdr->len;
5678 cur_next = cur_end + cur_hdr->cr + 1;
5679
5680 /* We have one full header between cur_ptr and cur_end, and the
5681 * next header starts at cur_next. We're only interested in
5682 * "Cookie:" headers.
5683 */
5684
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5685 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
5686 if (val) {
5687 if ((cur_end - (cur_ptr + val) >= 8) &&
5688 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
5689 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
5690 return;
5691 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5692 }
5693
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5694 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
5695 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5696 continue;
5697
5698 /* OK, right now we know we have a cache-control header at cur_ptr */
5699
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]5700 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5701
5702 if (p1 >= cur_end) /* no more info */
5703 continue;
5704
5705 /* p1 is at the beginning of the value */
5706 p2 = p1;
5707
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]5708 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5709 p2++;
5710
5711 /* we have a complete value between p1 and p2 */
5712 if (p2 < cur_end && *p2 == '=') {
5713 /* we have something of the form no-cache="set-cookie" */
5714 if ((cur_end - p1 >= 21) &&
5715 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
5716 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5717 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5718 continue;
5719 }
5720
5721 /* OK, so we know that either p2 points to the end of string or to a comma */
5722 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
5723 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
5724 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
5725 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5726 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5727 return;
5728 }
5729
5730 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]5731 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]5732 continue;
5733 }
5734 }
5735}
5736
5737
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5738/*
5739 * Try to retrieve a known appsession in the URI, then the associated server.
5740 * If the server is found, it's assigned to the session.
5741 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5742void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5743{
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5744 char *end_params, *first_param, *cur_param, *next_param;
5745 char separator;
5746 int value_len;
5747
5748 int mode = t->be->options2 & PR_O2_AS_M_ANY;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5749
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5750 if (t->be->appsession_name == NULL ||
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5751 (t->txn.meth != HTTP_METH_GET && t->txn.meth != HTTP_METH_POST)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5752 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5753 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5754
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5755 first_param = NULL;
5756 switch (mode) {
5757 case PR_O2_AS_M_PP:
5758 first_param = memchr(begin, ';', len);
5759 break;
5760 case PR_O2_AS_M_QS:
5761 first_param = memchr(begin, '?', len);
5762 break;
5763 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5764
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5765 if (first_param == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5766 return;
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5767 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5768
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5769 switch (mode) {
5770 case PR_O2_AS_M_PP:
5771 if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) {
5772 end_params = (char *) begin + len;
5773 }
5774 separator = ';';
5775 break;
5776 case PR_O2_AS_M_QS:
5777 end_params = (char *) begin + len;
5778 separator = '&';
5779 break;
5780 default:
5781 /* unknown mode, shouldn't happen */
5782 return;
5783 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5784
Cyril Bontéb21570a2009-11-29 20:04:48 +0100[diff] [blame]5785 cur_param = next_param = end_params;
5786 while (cur_param > first_param) {
5787 cur_param--;
5788 if ((cur_param[0] == separator) || (cur_param == first_param)) {
5789 /* let's see if this is the appsession parameter */
5790 if ((cur_param + t->be->appsession_name_len + 1 < next_param) &&
5791 ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') &&
5792 (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) {
5793 /* Cool... it's the right one */
5794 cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2);
5795 value_len = MIN(t->be->appsession_len, next_param - cur_param);
5796 if (value_len > 0) {
5797 manage_client_side_appsession(t, cur_param, value_len);
5798 }
5799 break;
5800 }
5801 next_param = cur_param;
5802 }
5803 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5804#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]5805 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]5806 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5807#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5808}
5809
5810
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5811/*
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]5812 * In a GET or HEAD request, check if the requested URI matches the stats uri
5813 * for the current backend, and if an authorization has been passed and is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5814 *
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]5815 * It is assumed that the request is either a HEAD or GET and that the
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]5816 * t->be->uri_auth field is valid. An HTTP/401 response may be sent, or
Willy Tarreaub0c9bc42009-10-04 15:56:38 +0200[diff] [blame]5817 * the stats I/O handler will be registered to start sending data.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5818 *
5819 * Returns 1 if the session's state changes, otherwise 0.
5820 */
5821int stats_check_uri_auth(struct session *t, struct proxy *backend)
5822{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5823 struct http_txn *txn = &t->txn;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5824 struct uri_auth *uri_auth = backend->uri_auth;
5825 struct user_auth *user;
5826 int authenticated, cur_idx;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5827 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5828
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]5829 memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats));
5830
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5831 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5832 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5833 return 0;
5834
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5835 h = t->req->data + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]5836
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]5837 /* the URI is in h */
5838 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5839 return 0;
5840
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]5841 h += uri_auth->uri_len;
5842 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 3) {
5843 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]5844 t->data_ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]5845 break;
5846 }
5847 h++;
5848 }
5849
5850 if (uri_auth->refresh) {
5851 h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
5852 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 10) {
5853 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]5854 t->data_ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]5855 break;
5856 }
5857 h++;
5858 }
5859 }
5860
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]5861 h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
5862 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 4) {
5863 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]5864 t->data_ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]5865 break;
5866 }
5867 h++;
5868 }
5869
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]5870 t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
5871
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5872 /* we are in front of a interceptable URI. Let's check
5873 * if there's an authentication and if it's valid.
5874 */
5875 user = uri_auth->users;
5876 if (!user) {
5877 /* no user auth required, it's OK */
5878 authenticated = 1;
5879 } else {
5880 authenticated = 0;
5881
5882 /* a user list is defined, we have to check.
5883 * skip 21 chars for "Authorization: Basic ".
5884 */
5885
5886 /* FIXME: this should move to an earlier place */
5887 cur_idx = 0;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5888 h = t->req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
5889 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
5890 int len = txn->hdr_idx.v[cur_idx].len;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5891 if (len > 14 &&
5892 !strncasecmp("Authorization:", h, 14)) {
Krzysztof Piotr Oledzki6f61b212009-10-04 23:34:15 +0200[diff] [blame]5893 chunk_initlen(&txn->auth_hdr, h, 0, len);
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5894 break;
5895 }
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5896 h += len + txn->hdr_idx.v[cur_idx].cr + 1;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5897 }
5898
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5899 if (txn->auth_hdr.len < 21 ||
5900 memcmp(txn->auth_hdr.str + 14, " Basic ", 7))
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5901 user = NULL;
5902
5903 while (user) {
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]5904 if ((txn->auth_hdr.len == user->user_len + 14 + 7)
5905 && !memcmp(txn->auth_hdr.str + 14 + 7,
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5906 user->user_pwd, user->user_len)) {
5907 authenticated = 1;
5908 break;
5909 }
5910 user = user->next;
5911 }
5912 }
5913
5914 if (!authenticated) {
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]5915 struct chunk msg;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5916
5917 /* no need to go further */
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]5918 sprintf(trash, HTTP_401_fmt, uri_auth->auth_realm);
5919 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]5920 txn->status = 401;
Willy Tarreaudded32d2008-11-30 19:48:07 +0100[diff] [blame]5921 stream_int_retnclose(t->req->prod, &msg);
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]5922 t->req->analysers = 0;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5923 if (!(t->flags & SN_ERR_MASK))
5924 t->flags |= SN_ERR_PRXCOND;
5925 if (!(t->flags & SN_FINST_MASK))
5926 t->flags |= SN_FINST_R;
5927 return 1;
5928 }
5929
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]5930 /* The request is valid, the user is authenticated. Let's start sending
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5931 * data.
5932 */
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]5933 t->logs.tv_request = now;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5934 t->data_source = DATA_SRC_STATS;
5935 t->data_state = DATA_ST_INIT;
Willy Tarreau91e99932008-06-30 07:51:00 +0200[diff] [blame]5936 t->task->nice = -32; /* small boost for HTTP statistics */
Willy Tarreaub0c9bc42009-10-04 15:56:38 +0200[diff] [blame]5937 stream_int_register_handler(t->rep->prod, http_stats_io_handler);
5938 t->rep->prod->private = t;
5939 t->rep->prod->st0 = t->rep->prod->st1 = 0;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5940 return 1;
5941}
5942
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]5943/*
5944 * Capture a bad request or response and archive it in the proxy's structure.
5945 */
5946void http_capture_bad_message(struct error_snapshot *es, struct session *s,
5947 struct buffer *buf, struct http_msg *msg,
5948 struct proxy *other_end)
5949{
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]5950 es->len = buf->r - (buf->data + msg->som);
5951 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]5952 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]5953 es->pos = msg->err_pos - msg->som;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]5954 else
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]5955 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]5956 es->when = date; // user-visible date
5957 es->sid = s->uniq_id;
5958 es->srv = s->srv;
5959 es->oe = other_end;
5960 es->src = s->cli_addr;
5961}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]5962
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5963/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5964 * Print a debug line with a header
5965 */
5966void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
5967{
5968 int len, max;
5969 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]5970 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5971 max = end - start;
5972 UBOUND(max, sizeof(trash) - len - 1);
5973 len += strlcpy2(trash + len, start, max + 1);
5974 trash[len++] = '\n';
5975 write(1, trash, len);
5976}
5977
Willy Tarreau0937bc42009-12-22 15:03:09 +0100[diff] [blame]5978/*
5979 * Initialize a new HTTP transaction for session <s>. It is assumed that all
5980 * the required fields are properly allocated and that we only need to (re)init
5981 * them. This should be used before processing any new request.
5982 */
5983void http_init_txn(struct session *s)
5984{
5985 struct http_txn *txn = &s->txn;
5986 struct proxy *fe = s->fe;
5987
5988 txn->flags = 0;
5989 txn->status = -1;
5990
5991 txn->req.sol = txn->req.eol = NULL;
5992 txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
5993 txn->rsp.sol = txn->rsp.eol = NULL;
5994 txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */
5995 txn->req.hdr_content_len = 0LL;
5996 txn->rsp.hdr_content_len = 0LL;
5997 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
5998 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
5999 chunk_reset(&txn->auth_hdr);
6000
6001 txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
6002 if (fe->options2 & PR_O2_REQBUG_OK)
6003 txn->req.err_pos = -1; /* let buggy requests pass */
6004
6005 if (txn->req.cap)
6006 memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *));
6007
6008 if (txn->rsp.cap)
6009 memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *));
6010
6011 if (txn->hdr_idx.v)
6012 hdr_idx_init(&txn->hdr_idx);
6013}
6014
6015/* to be used at the end of a transaction */
6016void http_end_txn(struct session *s)
6017{
6018 struct http_txn *txn = &s->txn;
6019
6020 /* these ones will have been dynamically allocated */
6021 pool_free2(pool2_requri, txn->uri);
6022 pool_free2(pool2_capture, txn->cli_cookie);
6023 pool_free2(pool2_capture, txn->srv_cookie);
6024 txn->uri = NULL;
6025 txn->srv_cookie = NULL;
6026 txn->cli_cookie = NULL;
6027}
6028
6029/* to be used at the end of a transaction to prepare a new one */
6030void http_reset_txn(struct session *s)
6031{
6032 http_end_txn(s);
6033 http_init_txn(s);
6034
6035 s->be = s->fe;
6036 s->req->analysers = s->listener->analysers;
6037 s->logs.logwait = s->fe->to_log;
6038 s->srv = s->prev_srv = s->srv_conn = NULL;
6039 s->pend_pos = NULL;
6040 s->conn_retries = s->be->conn_retries;
6041
6042 s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
6043
6044 s->req->rto = s->fe->timeout.client;
6045 s->req->wto = s->be->timeout.server;
6046 s->req->cto = s->be->timeout.connect;
6047
6048 s->rep->rto = s->be->timeout.server;
6049 s->rep->wto = s->fe->timeout.client;
6050 s->rep->cto = TICK_ETERNITY;
6051
6052 s->req->rex = TICK_ETERNITY;
6053 s->req->wex = TICK_ETERNITY;
6054 s->req->analyse_exp = TICK_ETERNITY;
6055 s->rep->rex = TICK_ETERNITY;
6056 s->rep->wex = TICK_ETERNITY;
6057 s->rep->analyse_exp = TICK_ETERNITY;
6058}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6059
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6060/************************************************************************/
6061/* The code below is dedicated to ACL parsing and matching */
6062/************************************************************************/
6063
6064
6065
6066
6067/* 1. Check on METHOD
6068 * We use the pre-parsed method if it is known, and store its number as an
6069 * integer. If it is unknown, we use the pointer and the length.
6070 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6071static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6072{
6073 int len, meth;
6074
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6075 len = strlen(*text);
6076 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6077
6078 pattern->val.i = meth;
6079 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6080 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6081 if (!pattern->ptr.str)
6082 return 0;
6083 pattern->len = len;
6084 }
6085 return 1;
6086}
6087
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6088static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6089acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
6090 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6091{
6092 int meth;
6093 struct http_txn *txn = l7;
6094
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6095 if (!txn)
6096 return 0;
6097
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6098 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6099 return 0;
6100
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6101 meth = txn->meth;
6102 test->i = meth;
6103 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6104 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6105 /* ensure the indexes are not affected */
6106 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6107 test->len = txn->req.sl.rq.m_l;
6108 test->ptr = txn->req.sol;
6109 }
6110 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
6111 return 1;
6112}
6113
6114static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
6115{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]6116 int icase;
6117
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6118 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6119 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6120
6121 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6122 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6123
6124 /* Other method, we must compare the strings */
6125 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6126 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]6127
6128 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
6129 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
6130 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]6131 return ACL_PAT_FAIL;
6132 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6133}
6134
6135/* 2. Check on Request/Status Version
6136 * We simply compare strings here.
6137 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6138static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6139{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6140 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6141 if (!pattern->ptr.str)
6142 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]6143 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6144 return 1;
6145}
6146
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6147static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6148acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
6149 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6150{
6151 struct http_txn *txn = l7;
6152 char *ptr;
6153 int len;
6154
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6155 if (!txn)
6156 return 0;
6157
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6158 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6159 return 0;
6160
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6161 len = txn->req.sl.rq.v_l;
6162 ptr = txn->req.sol + txn->req.sl.rq.v - txn->req.som;
6163
6164 while ((len-- > 0) && (*ptr++ != '/'));
6165 if (len <= 0)
6166 return 0;
6167
6168 test->ptr = ptr;
6169 test->len = len;
6170
6171 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
6172 return 1;
6173}
6174
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6175static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6176acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
6177 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6178{
6179 struct http_txn *txn = l7;
6180 char *ptr;
6181 int len;
6182
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6183 if (!txn)
6184 return 0;
6185
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6186 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6187 return 0;
6188
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6189 len = txn->rsp.sl.st.v_l;
6190 ptr = txn->rsp.sol;
6191
6192 while ((len-- > 0) && (*ptr++ != '/'));
6193 if (len <= 0)
6194 return 0;
6195
6196 test->ptr = ptr;
6197 test->len = len;
6198
6199 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
6200 return 1;
6201}
6202
6203/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6204static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6205acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
6206 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6207{
6208 struct http_txn *txn = l7;
6209 char *ptr;
6210 int len;
6211
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6212 if (!txn)
6213 return 0;
6214
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6215 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6216 return 0;
6217
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6218 len = txn->rsp.sl.st.c_l;
6219 ptr = txn->rsp.sol + txn->rsp.sl.st.c - txn->rsp.som;
6220
6221 test->i = __strl2ui(ptr, len);
6222 test->flags = ACL_TEST_F_VOL_1ST;
6223 return 1;
6224}
6225
6226/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]6227static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]6228acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
6229 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6230{
6231 struct http_txn *txn = l7;
6232
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6233 if (!txn)
6234 return 0;
6235
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6236 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6237 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6238
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6239 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6240 /* ensure the indexes are not affected */
6241 return 0;
6242
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6243 test->len = txn->req.sl.rq.u_l;
Willy Tarreaua95a1f42010-01-03 13:04:35 +0100[diff] [blame]6244 test->ptr = txn->req.sol - txn->req.som + txn->req.sl.rq.u;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6245
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]6246 /* we do not need to set READ_ONLY because the data is in a buffer */
6247 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6248 return 1;
6249}
6250
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6251static int
6252acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
6253 struct acl_expr *expr, struct acl_test *test)
6254{
6255 struct http_txn *txn = l7;
6256
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6257 if (!txn)
6258 return 0;
6259
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6260 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6261 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6262
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6263 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6264 /* ensure the indexes are not affected */
6265 return 0;
6266
6267 /* Parse HTTP request */
Willy Tarreaua95a1f42010-01-03 13:04:35 +0100[diff] [blame]6268 url2sa(txn->req.sol - txn->req.som + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6269 test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr;
6270 test->i = AF_INET;
6271
6272 /*
6273 * If we are parsing url in frontend space, we prepare backend stage
6274 * to not parse again the same url ! optimization lazyness...
6275 */
6276 if (px->options & PR_O_HTTP_PROXY)
6277 l4->flags |= SN_ADDR_SET;
6278
6279 test->flags = ACL_TEST_F_READ_ONLY;
6280 return 1;
6281}
6282
6283static int
6284acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
6285 struct acl_expr *expr, struct acl_test *test)
6286{
6287 struct http_txn *txn = l7;
6288
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6289 if (!txn)
6290 return 0;
6291
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6292 if (txn->req.msg_state < HTTP_MSG_BODY)
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6293 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6294
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6295 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6296 /* ensure the indexes are not affected */
6297 return 0;
6298
6299 /* Same optimization as url_ip */
Willy Tarreaua95a1f42010-01-03 13:04:35 +0100[diff] [blame]6300 url2sa(txn->req.sol - txn->req.som + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]6301 test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port);
6302
6303 if (px->options & PR_O_HTTP_PROXY)
6304 l4->flags |= SN_ADDR_SET;
6305
6306 test->flags = ACL_TEST_F_READ_ONLY;
6307 return 1;
6308}
6309
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6310/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
6311 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
6312 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6313static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6314acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6315 struct acl_expr *expr, struct acl_test *test)
6316{
6317 struct http_txn *txn = l7;
6318 struct hdr_idx *idx = &txn->hdr_idx;
6319 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6320
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6321 if (!txn)
6322 return 0;
6323
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6324 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
6325 /* search for header from the beginning */
6326 ctx->idx = 0;
6327
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6328 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
6329 test->flags |= ACL_TEST_F_FETCH_MORE;
6330 test->flags |= ACL_TEST_F_VOL_HDR;
6331 test->len = ctx->vlen;
6332 test->ptr = (char *)ctx->line + ctx->val;
6333 return 1;
6334 }
6335
6336 test->flags &= ~ACL_TEST_F_FETCH_MORE;
6337 test->flags |= ACL_TEST_F_VOL_HDR;
6338 return 0;
6339}
6340
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6341static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6342acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
6343 struct acl_expr *expr, struct acl_test *test)
6344{
6345 struct http_txn *txn = l7;
6346
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6347 if (!txn)
6348 return 0;
6349
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6350 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6351 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6352
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6353 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6354 /* ensure the indexes are not affected */
6355 return 0;
6356
6357 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
6358}
6359
6360static int
6361acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
6362 struct acl_expr *expr, struct acl_test *test)
6363{
6364 struct http_txn *txn = l7;
6365
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6366 if (!txn)
6367 return 0;
6368
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6369 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6370 return 0;
6371
6372 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
6373}
6374
6375/* 6. Check on HTTP header count. The number of occurrences is returned.
6376 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
6377 */
6378static int
6379acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6380 struct acl_expr *expr, struct acl_test *test)
6381{
6382 struct http_txn *txn = l7;
6383 struct hdr_idx *idx = &txn->hdr_idx;
6384 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6385 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6386
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6387 if (!txn)
6388 return 0;
6389
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6390 ctx.idx = 0;
6391 cnt = 0;
6392 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
6393 cnt++;
6394
6395 test->i = cnt;
6396 test->flags = ACL_TEST_F_VOL_HDR;
6397 return 1;
6398}
6399
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6400static int
6401acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
6402 struct acl_expr *expr, struct acl_test *test)
6403{
6404 struct http_txn *txn = l7;
6405
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6406 if (!txn)
6407 return 0;
6408
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6409 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6410 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6411
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6412 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6413 /* ensure the indexes are not affected */
6414 return 0;
6415
6416 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
6417}
6418
6419static int
6420acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
6421 struct acl_expr *expr, struct acl_test *test)
6422{
6423 struct http_txn *txn = l7;
6424
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6425 if (!txn)
6426 return 0;
6427
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6428 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6429 return 0;
6430
6431 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
6432}
6433
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6434/* 7. Check on HTTP header's integer value. The integer value is returned.
6435 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6436 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6437 */
6438static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6439acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6440 struct acl_expr *expr, struct acl_test *test)
6441{
6442 struct http_txn *txn = l7;
6443 struct hdr_idx *idx = &txn->hdr_idx;
6444 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6445
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6446 if (!txn)
6447 return 0;
6448
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6449 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
6450 /* search for header from the beginning */
6451 ctx->idx = 0;
6452
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6453 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
6454 test->flags |= ACL_TEST_F_FETCH_MORE;
6455 test->flags |= ACL_TEST_F_VOL_HDR;
6456 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
6457 return 1;
6458 }
6459
6460 test->flags &= ~ACL_TEST_F_FETCH_MORE;
6461 test->flags |= ACL_TEST_F_VOL_HDR;
6462 return 0;
6463}
6464
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6465static int
6466acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
6467 struct acl_expr *expr, struct acl_test *test)
6468{
6469 struct http_txn *txn = l7;
6470
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6471 if (!txn)
6472 return 0;
6473
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6474 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6475 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6476
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6477 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6478 /* ensure the indexes are not affected */
6479 return 0;
6480
6481 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
6482}
6483
6484static int
6485acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
6486 struct acl_expr *expr, struct acl_test *test)
6487{
6488 struct http_txn *txn = l7;
6489
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6490 if (!txn)
6491 return 0;
6492
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6493 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6494 return 0;
6495
6496 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
6497}
6498
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]6499/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
6500 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
6501 */
6502static int
6503acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
6504 struct acl_expr *expr, struct acl_test *test)
6505{
6506 struct http_txn *txn = l7;
6507 struct hdr_idx *idx = &txn->hdr_idx;
6508 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
6509
6510 if (!txn)
6511 return 0;
6512
6513 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
6514 /* search for header from the beginning */
6515 ctx->idx = 0;
6516
6517 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
6518 test->flags |= ACL_TEST_F_FETCH_MORE;
6519 test->flags |= ACL_TEST_F_VOL_HDR;
6520 /* Same optimization as url_ip */
6521 memset(&l4->srv_addr.sin_addr, 0, sizeof(l4->srv_addr.sin_addr));
6522 url2ip((char *)ctx->line + ctx->val, &l4->srv_addr.sin_addr);
6523 test->ptr = (void *)&l4->srv_addr.sin_addr;
6524 test->i = AF_INET;
6525 return 1;
6526 }
6527
6528 test->flags &= ~ACL_TEST_F_FETCH_MORE;
6529 test->flags |= ACL_TEST_F_VOL_HDR;
6530 return 0;
6531}
6532
6533static int
6534acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
6535 struct acl_expr *expr, struct acl_test *test)
6536{
6537 struct http_txn *txn = l7;
6538
6539 if (!txn)
6540 return 0;
6541
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6542 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]6543 return 0;
6544
6545 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6546 /* ensure the indexes are not affected */
6547 return 0;
6548
6549 return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
6550}
6551
6552static int
6553acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
6554 struct acl_expr *expr, struct acl_test *test)
6555{
6556 struct http_txn *txn = l7;
6557
6558 if (!txn)
6559 return 0;
6560
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6561 if (txn->rsp.msg_state < HTTP_MSG_BODY)
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]6562 return 0;
6563
6564 return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
6565}
6566
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]6567/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
6568 * the first '/' after the possible hostname, and ends before the possible '?'.
6569 */
6570static int
6571acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
6572 struct acl_expr *expr, struct acl_test *test)
6573{
6574 struct http_txn *txn = l7;
6575 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]6576
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6577 if (!txn)
6578 return 0;
6579
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6580 if (txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6581 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]6582
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]6583 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
6584 /* ensure the indexes are not affected */
6585 return 0;
6586
Willy Tarreaua95a1f42010-01-03 13:04:35 +0100[diff] [blame]6587 end = txn->req.sol - txn->req.som + txn->req.sl.rq.u + txn->req.sl.rq.u_l;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]6588 ptr = http_get_path(txn);
6589 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]6590 return 0;
6591
6592 /* OK, we got the '/' ! */
6593 test->ptr = ptr;
6594
6595 while (ptr < end && *ptr != '?')
6596 ptr++;
6597
6598 test->len = ptr - test->ptr;
6599
6600 /* we do not need to set READ_ONLY because the data is in a buffer */
6601 test->flags = ACL_TEST_F_VOL_1ST;
6602 return 1;
6603}
6604
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]6605static int
6606acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
6607 struct acl_expr *expr, struct acl_test *test)
6608{
6609 struct buffer *req = s->req;
6610 struct http_txn *txn = &s->txn;
6611 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]6612
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]6613 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
6614 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
6615 */
6616
6617 if (!s || !req)
6618 return 0;
6619
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6620 if (unlikely(msg->msg_state >= HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]6621 /* Already decoded as OK */
6622 test->flags |= ACL_TEST_F_SET_RES_PASS;
6623 return 1;
6624 }
6625
6626 /* Try to decode HTTP request */
6627 if (likely(req->lr < req->r))
6628 http_msg_analyzer(req, msg, &txn->hdr_idx);
6629
Willy Tarreau655dce92009-11-08 13:10:58 +0100[diff] [blame]6630 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]6631 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
6632 test->flags |= ACL_TEST_F_SET_RES_FAIL;
6633 return 1;
6634 }
6635 /* wait for final state */
6636 test->flags |= ACL_TEST_F_MAY_CHANGE;
6637 return 0;
6638 }
6639
6640 /* OK we got a valid HTTP request. We have some minor preparation to
6641 * perform so that further checks can rely on HTTP tests.
6642 */
6643 msg->sol = req->data + msg->som;
6644 txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
6645 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
6646 s->flags |= SN_REDIRECTABLE;
6647
6648 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
6649 test->flags |= ACL_TEST_F_SET_RES_FAIL;
6650 return 1;
6651 }
6652
6653 test->flags |= ACL_TEST_F_SET_RES_PASS;
6654 return 1;
6655}
6656
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6657
6658/************************************************************************/
6659/* All supported keywords must be declared here. */
6660/************************************************************************/
6661
6662/* Note: must not be declared <const> as its list will be overwritten */
6663static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]6664 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
6665
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]6666 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
6667 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE },
6668 { "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE },
6669 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6670
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]6671 { "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE },
6672 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
6673 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
6674 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
6675 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
6676 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
6677 { "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
6678 { "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE },
6679 { "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]6680
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]6681 /* note: we should set hdr* to use ACL_USE_HDR_VOLATILE, and chdr* to use L7REQ_VOLATILE */
6682 { "hdr", acl_parse_str, acl_fetch_chdr, acl_match_str, ACL_USE_L7REQ_VOLATILE },
6683 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
6684 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
6685 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
6686 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
6687 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
6688 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
6689 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
6690 { "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]6691 { "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]6692
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]6693 { "shdr", acl_parse_str, acl_fetch_shdr, acl_match_str, ACL_USE_L7RTR_VOLATILE },
6694 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
6695 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
6696 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
6697 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
6698 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
6699 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
6700 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
6701 { "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]6702 { "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]6703
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]6704 { "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE },
6705 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
6706 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
6707 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
6708 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
6709 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
6710 { "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]6711
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]6712 { NULL, NULL, NULL, NULL },
6713
6714#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6715 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
6716 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
6717 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
6718 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
6719 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
6720 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
6721 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
6722
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]6723 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
6724 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
6725 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
6726 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
6727 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
6728 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
6729 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
6730 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
6731
6732 { "auth_user", acl_parse_str, acl_fetch_user, acl_match_str },
6733 { "auth_regex", acl_parse_reg, acl_fetch_user, acl_match_reg },
6734 { "auth_clear", acl_parse_str, acl_fetch_auth, acl_match_str },
6735 { "auth_md5", acl_parse_str, acl_fetch_auth, acl_match_md5 },
6736 { NULL, NULL, NULL, NULL },
6737#endif
6738}};
6739
6740
6741__attribute__((constructor))
6742static void __http_protocol_init(void)
6743{
6744 acl_register_keywords(&acl_kws);
6745}
6746
6747
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]6748/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]6749 * Local variables:
6750 * c-indent-level: 8
6751 * c-basic-offset: 8
6752 * End:
6753 */