Gitiles
Code Review Sign In
git01.mediatek.com / haproxy / b37c27e28f57a022ef570e3f60a99faaf5a7a9f2 / . / src / proto_http.c
blob: 31a2098f6768ced06f01a5b7e5df121b2ffeefb8 [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1/*
2 * HTTP protocol analyzer
3 *
Willy Tarreau7c669d72008-06-20 15:04:11 +0200[diff] [blame]4 * Copyright 2000-2008 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>
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]44#include <proto/client.h>
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]45#include <proto/dumpstats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]46#include <proto/fd.h>
47#include <proto/log.h>
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]48#include <proto/hdr_idx.h>
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]49#include <proto/proto_tcp.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]50#include <proto/proto_http.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]51#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]52#include <proto/queue.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]53#include <proto/server.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]54#include <proto/session.h>
Willy Tarreaucff64112008-11-03 06:26:53 +0100[diff] [blame]55#include <proto/stream_interface.h>
Willy Tarreau2d212792008-08-27 21:41:35 +0200[diff] [blame]56#include <proto/stream_sock.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]57#include <proto/task.h>
58
Willy Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]59/* This is used by remote monitoring */
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]60const char HTTP_200[] =
Willy Tarreau1c47f852006-07-09 08:22:27 +0200[diff] [blame]61 "HTTP/1.0 200 OK\r\n"
62 "Cache-Control: no-cache\r\n"
63 "Connection: close\r\n"
64 "Content-Type: text/html\r\n"
65 "\r\n"
66 "<html><body><h1>200 OK</h1>\nHAProxy: service ready.\n</body></html>\n";
67
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]68const struct chunk http_200_chunk = {
69 .str = (char *)&HTTP_200,
70 .len = sizeof(HTTP_200)-1
71};
72
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]73const char *HTTP_301 =
74 "HTTP/1.0 301 Moved Permantenly\r\n"
75 "Cache-Control: no-cache\r\n"
76 "Connection: close\r\n"
77 "Location: "; /* not terminated since it will be concatenated with the URL */
78
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]79const char *HTTP_302 =
80 "HTTP/1.0 302 Found\r\n"
81 "Cache-Control: no-cache\r\n"
82 "Connection: close\r\n"
83 "Location: "; /* not terminated since it will be concatenated with the URL */
84
85/* same as 302 except that the browser MUST retry with the GET method */
86const char *HTTP_303 =
87 "HTTP/1.0 303 See Other\r\n"
88 "Cache-Control: no-cache\r\n"
89 "Connection: close\r\n"
90 "Location: "; /* not terminated since it will be concatenated with the URL */
91
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]92/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
93const char *HTTP_401_fmt =
94 "HTTP/1.0 401 Unauthorized\r\n"
95 "Cache-Control: no-cache\r\n"
96 "Connection: close\r\n"
Willy Tarreau791d66d2006-07-08 16:53:38 +0200[diff] [blame]97 "Content-Type: text/html\r\n"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]98 "WWW-Authenticate: Basic realm=\"%s\"\r\n"
99 "\r\n"
100 "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
101
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]102
103const int http_err_codes[HTTP_ERR_SIZE] = {
104 [HTTP_ERR_400] = 400,
105 [HTTP_ERR_403] = 403,
106 [HTTP_ERR_408] = 408,
107 [HTTP_ERR_500] = 500,
108 [HTTP_ERR_502] = 502,
109 [HTTP_ERR_503] = 503,
110 [HTTP_ERR_504] = 504,
111};
112
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]113static const char *http_err_msgs[HTTP_ERR_SIZE] = {
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]114 [HTTP_ERR_400] =
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]115 "HTTP/1.0 400 Bad request\r\n"
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]116 "Cache-Control: no-cache\r\n"
117 "Connection: close\r\n"
118 "Content-Type: text/html\r\n"
119 "\r\n"
120 "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
121
122 [HTTP_ERR_403] =
123 "HTTP/1.0 403 Forbidden\r\n"
124 "Cache-Control: no-cache\r\n"
125 "Connection: close\r\n"
126 "Content-Type: text/html\r\n"
127 "\r\n"
128 "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
129
130 [HTTP_ERR_408] =
131 "HTTP/1.0 408 Request Time-out\r\n"
132 "Cache-Control: no-cache\r\n"
133 "Connection: close\r\n"
134 "Content-Type: text/html\r\n"
135 "\r\n"
136 "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
137
138 [HTTP_ERR_500] =
139 "HTTP/1.0 500 Server Error\r\n"
140 "Cache-Control: no-cache\r\n"
141 "Connection: close\r\n"
142 "Content-Type: text/html\r\n"
143 "\r\n"
144 "<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
145
146 [HTTP_ERR_502] =
147 "HTTP/1.0 502 Bad Gateway\r\n"
148 "Cache-Control: no-cache\r\n"
149 "Connection: close\r\n"
150 "Content-Type: text/html\r\n"
151 "\r\n"
152 "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
153
154 [HTTP_ERR_503] =
155 "HTTP/1.0 503 Service Unavailable\r\n"
156 "Cache-Control: no-cache\r\n"
157 "Connection: close\r\n"
158 "Content-Type: text/html\r\n"
159 "\r\n"
160 "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
161
162 [HTTP_ERR_504] =
163 "HTTP/1.0 504 Gateway Time-out\r\n"
164 "Cache-Control: no-cache\r\n"
165 "Connection: close\r\n"
166 "Content-Type: text/html\r\n"
167 "\r\n"
168 "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
169
170};
171
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]172/* We must put the messages here since GCC cannot initialize consts depending
173 * on strlen().
174 */
175struct chunk http_err_chunks[HTTP_ERR_SIZE];
176
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]177#define FD_SETS_ARE_BITFIELDS
178#ifdef FD_SETS_ARE_BITFIELDS
179/*
180 * This map is used with all the FD_* macros to check whether a particular bit
181 * is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
182 * which should be encoded. When FD_ISSET() returns non-zero, it means that the
183 * byte should be encoded. Be careful to always pass bytes from 0 to 255
184 * exclusively to the macros.
185 */
186fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
187fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
188
189#else
190#error "Check if your OS uses bitfields for fd_sets"
191#endif
192
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]193void init_proto_http()
194{
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]195 int i;
196 char *tmp;
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]197 int msg;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]198
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]199 for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
200 if (!http_err_msgs[msg]) {
201 Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
202 abort();
203 }
204
205 http_err_chunks[msg].str = (char *)http_err_msgs[msg];
206 http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
207 }
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]208
209 /* initialize the log header encoding map : '{|}"#' should be encoded with
210 * '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
211 * URL encoding only requires '"', '#' to be encoded as well as non-
212 * printable characters above.
213 */
214 memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
215 memset(url_encode_map, 0, sizeof(url_encode_map));
216 for (i = 0; i < 32; i++) {
217 FD_SET(i, hdr_encode_map);
218 FD_SET(i, url_encode_map);
219 }
220 for (i = 127; i < 256; i++) {
221 FD_SET(i, hdr_encode_map);
222 FD_SET(i, url_encode_map);
223 }
224
225 tmp = "\"#{|}";
226 while (*tmp) {
227 FD_SET(*tmp, hdr_encode_map);
228 tmp++;
229 }
230
231 tmp = "\"#";
232 while (*tmp) {
233 FD_SET(*tmp, url_encode_map);
234 tmp++;
235 }
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]236
237 /* memory allocations */
238 pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]239 pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]240}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]241
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]242/*
243 * We have 26 list of methods (1 per first letter), each of which can have
244 * up to 3 entries (2 valid, 1 null).
245 */
246struct http_method_desc {
247 http_meth_t meth;
248 int len;
249 const char text[8];
250};
251
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]252const struct http_method_desc http_methods[26][3] = {
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]253 ['C' - 'A'] = {
254 [0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
255 },
256 ['D' - 'A'] = {
257 [0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
258 },
259 ['G' - 'A'] = {
260 [0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
261 },
262 ['H' - 'A'] = {
263 [0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
264 },
265 ['P' - 'A'] = {
266 [0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
267 [1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
268 },
269 ['T' - 'A'] = {
270 [0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
271 },
272 /* rest is empty like this :
273 * [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
274 */
275};
276
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]277/* 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]278 * table than to perform a boolean AND or OR between two tests. Refer to
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]279 * RFC2616 for those chars.
280 */
281
282const char http_is_spht[256] = {
283 [' '] = 1, ['\t'] = 1,
284};
285
286const char http_is_crlf[256] = {
287 ['\r'] = 1, ['\n'] = 1,
288};
289
290const char http_is_lws[256] = {
291 [' '] = 1, ['\t'] = 1,
292 ['\r'] = 1, ['\n'] = 1,
293};
294
295const char http_is_sep[256] = {
296 ['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
297 ['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
298 ['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
299 ['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
300 [' '] = 1, ['\t'] = 1, ['\\'] = 1,
301};
302
303const char http_is_ctl[256] = {
304 [0 ... 31] = 1,
305 [127] = 1,
306};
307
308/*
309 * A token is any ASCII char that is neither a separator nor a CTL char.
310 * Do not overwrite values in assignment since gcc-2.95 will not handle
311 * them correctly. Instead, define every non-CTL char's status.
312 */
313const char http_is_token[256] = {
314 [' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
315 ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
316 ['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
317 [','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
318 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
319 ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
320 ['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
321 ['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
322 ['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
323 ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
324 ['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
325 ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
326 ['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
327 ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
328 ['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
329 ['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
330 ['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
331 ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
332 ['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
333 ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
334 ['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
335 ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
336 ['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
337 ['|'] = 1, ['}'] = 0, ['~'] = 1,
338};
339
340
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]341/*
342 * An http ver_token is any ASCII which can be found in an HTTP version,
343 * which includes 'H', 'T', 'P', '/', '.' and any digit.
344 */
345const char http_is_ver_token[256] = {
346 ['.'] = 1, ['/'] = 1,
347 ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
348 ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
349 ['H'] = 1, ['P'] = 1, ['T'] = 1,
350};
351
352
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]353/*
354 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
355 * CRLF. Text length is measured first, so it cannot be NULL.
356 * The header is also automatically added to the index <hdr_idx>, and the end
357 * of headers is automatically adjusted. The number of bytes added is returned
358 * on success, otherwise <0 is returned indicating an error.
359 */
360int http_header_add_tail(struct buffer *b, struct http_msg *msg,
361 struct hdr_idx *hdr_idx, const char *text)
362{
363 int bytes, len;
364
365 len = strlen(text);
366 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
367 if (!bytes)
368 return -1;
369 msg->eoh += bytes;
370 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
371}
372
373/*
374 * Adds a header and its CRLF at the tail of buffer <b>, just before the last
375 * CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
376 * the buffer is only opened and the space reserved, but nothing is copied.
377 * The header is also automatically added to the index <hdr_idx>, and the end
378 * of headers is automatically adjusted. The number of bytes added is returned
379 * on success, otherwise <0 is returned indicating an error.
380 */
381int http_header_add_tail2(struct buffer *b, struct http_msg *msg,
382 struct hdr_idx *hdr_idx, const char *text, int len)
383{
384 int bytes;
385
386 bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
387 if (!bytes)
388 return -1;
389 msg->eoh += bytes;
390 return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
391}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]392
393/*
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]394 * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
395 * If so, returns the position of the first non-space character relative to
396 * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
397 * to return a pointer to the place after the first space. Returns 0 if the
398 * header name does not match. Checks are case-insensitive.
399 */
400int http_header_match2(const char *hdr, const char *end,
401 const char *name, int len)
402{
403 const char *val;
404
405 if (hdr + len >= end)
406 return 0;
407 if (hdr[len] != ':')
408 return 0;
409 if (strncasecmp(hdr, name, len) != 0)
410 return 0;
411 val = hdr + len + 1;
412 while (val < end && HTTP_IS_SPHT(*val))
413 val++;
414 if ((val >= end) && (len + 2 <= end - hdr))
415 return len + 2; /* we may replace starting from second space */
416 return val - hdr;
417}
418
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]419/* Find the end of the header value contained between <s> and <e>.
420 * See RFC2616, par 2.2 for more information. Note that it requires
421 * a valid header to return a valid result.
422 */
423const char *find_hdr_value_end(const char *s, const char *e)
424{
425 int quoted, qdpair;
426
427 quoted = qdpair = 0;
428 for (; s < e; s++) {
429 if (qdpair) qdpair = 0;
430 else if (quoted && *s == '\\') qdpair = 1;
431 else if (quoted && *s == '"') quoted = 0;
432 else if (*s == '"') quoted = 1;
433 else if (*s == ',') return s;
434 }
435 return s;
436}
437
438/* Find the first or next occurrence of header <name> in message buffer <sol>
439 * using headers index <idx>, and return it in the <ctx> structure. This
440 * structure holds everything necessary to use the header and find next
441 * occurrence. If its <idx> member is 0, the header is searched from the
442 * beginning. Otherwise, the next occurrence is returned. The function returns
443 * 1 when it finds a value, and 0 when there is no more.
444 */
445int http_find_header2(const char *name, int len,
446 const char *sol, struct hdr_idx *idx,
447 struct hdr_ctx *ctx)
448{
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]449 const char *eol, *sov;
450 int cur_idx;
451
452 if (ctx->idx) {
453 /* We have previously returned a value, let's search
454 * another one on the same line.
455 */
456 cur_idx = ctx->idx;
457 sol = ctx->line;
458 sov = sol + ctx->val + ctx->vlen;
459 eol = sol + idx->v[cur_idx].len;
460
461 if (sov >= eol)
462 /* no more values in this header */
463 goto next_hdr;
464
465 /* values remaining for this header, skip the comma */
466 sov++;
467 while (sov < eol && http_is_lws[(unsigned char)*sov])
468 sov++;
469
470 goto return_hdr;
471 }
472
473 /* first request for this header */
474 sol += hdr_idx_first_pos(idx);
475 cur_idx = hdr_idx_first_idx(idx);
476
477 while (cur_idx) {
478 eol = sol + idx->v[cur_idx].len;
479
Willy Tarreau1ad7c6d2007-06-10 21:42:55 +0200[diff] [blame]480 if (len == 0) {
481 /* No argument was passed, we want any header.
482 * To achieve this, we simply build a fake request. */
483 while (sol + len < eol && sol[len] != ':')
484 len++;
485 name = sol;
486 }
487
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]488 if ((len < eol - sol) &&
489 (sol[len] == ':') &&
490 (strncasecmp(sol, name, len) == 0)) {
491
492 sov = sol + len + 1;
493 while (sov < eol && http_is_lws[(unsigned char)*sov])
494 sov++;
495 return_hdr:
496 ctx->line = sol;
497 ctx->idx = cur_idx;
498 ctx->val = sov - sol;
499
500 eol = find_hdr_value_end(sov, eol);
501 ctx->vlen = eol - sov;
502 return 1;
503 }
504 next_hdr:
505 sol = eol + idx->v[cur_idx].cr + 1;
506 cur_idx = idx->v[cur_idx].next;
507 }
508 return 0;
509}
510
511int http_find_header(const char *name,
512 const char *sol, struct hdr_idx *idx,
513 struct hdr_ctx *ctx)
514{
515 return http_find_header2(name, strlen(name), sol, idx, ctx);
516}
517
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]518/* This function handles a server error at the stream interface level. The
519 * stream interface is assumed to be already in a closed state. An optional
520 * message is copied into the input buffer, and an HTTP status code stored.
521 * The error flags are set to the values in arguments. Any pending request
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]522 * in this buffer will be lost.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]523 */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]524static void http_server_error(struct session *t, struct stream_interface *si,
525 int err, int finst, int status, const struct chunk *msg)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]526{
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]527 buffer_erase(si->ob);
528 buffer_erase(si->ib);
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]529 buffer_auto_close(si->ib);
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]530 if (status > 0 && msg) {
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]531 t->txn.status = status;
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]532 buffer_write(si->ib, msg->str, msg->len);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]533 }
534 if (!(t->flags & SN_ERR_MASK))
535 t->flags |= err;
536 if (!(t->flags & SN_FINST_MASK))
537 t->flags |= finst;
538}
539
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]540/* This function returns the appropriate error location for the given session
541 * and message.
542 */
543
544struct chunk *error_message(struct session *s, int msgnum)
545{
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]546 if (s->be->errmsg[msgnum].str)
547 return &s->be->errmsg[msgnum];
Willy Tarreau80587432006-12-24 17:47:20 +0100[diff] [blame]548 else if (s->fe->errmsg[msgnum].str)
549 return &s->fe->errmsg[msgnum];
550 else
551 return &http_err_chunks[msgnum];
552}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]553
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]554/*
555 * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
556 * string), HTTP_METH_OTHER for unknown methods, or the identified method.
557 */
558static http_meth_t find_http_meth(const char *str, const int len)
559{
560 unsigned char m;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]561 const struct http_method_desc *h;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]562
563 m = ((unsigned)*str - 'A');
564
565 if (m < 26) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]566 for (h = http_methods[m]; h->len > 0; h++) {
567 if (unlikely(h->len != len))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]568 continue;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]569 if (likely(memcmp(str, h->text, h->len) == 0))
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]570 return h->meth;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]571 };
572 return HTTP_METH_OTHER;
573 }
574 return HTTP_METH_NONE;
575
576}
577
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]578/* Parse the URI from the given transaction (which is assumed to be in request
579 * phase) and look for the "/" beginning the PATH. If not found, return NULL.
580 * It is returned otherwise.
581 */
582static char *
583http_get_path(struct http_txn *txn)
584{
585 char *ptr, *end;
586
587 ptr = txn->req.sol + txn->req.sl.rq.u;
588 end = ptr + txn->req.sl.rq.u_l;
589
590 if (ptr >= end)
591 return NULL;
592
593 /* RFC2616, par. 5.1.2 :
594 * Request-URI = "*" | absuri | abspath | authority
595 */
596
597 if (*ptr == '*')
598 return NULL;
599
600 if (isalpha((unsigned char)*ptr)) {
601 /* this is a scheme as described by RFC3986, par. 3.1 */
602 ptr++;
603 while (ptr < end &&
604 (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
605 ptr++;
606 /* skip '://' */
607 if (ptr == end || *ptr++ != ':')
608 return NULL;
609 if (ptr == end || *ptr++ != '/')
610 return NULL;
611 if (ptr == end || *ptr++ != '/')
612 return NULL;
613 }
614 /* skip [user[:passwd]@]host[:[port]] */
615
616 while (ptr < end && *ptr != '/')
617 ptr++;
618
619 if (ptr == end)
620 return NULL;
621
622 /* OK, we got the '/' ! */
623 return ptr;
624}
625
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]626/* Returns a 302 for a redirectable request. This may only be called just after
627 * the stream interface has moved to SI_ST_ASS. Unprocessable requests are
628 * left unchanged and will follow normal proxy processing.
629 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]630void perform_http_redirect(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]631{
632 struct http_txn *txn;
633 struct chunk rdr;
634 char *path;
635 int len;
636
637 /* 1: create the response header */
638 rdr.len = strlen(HTTP_302);
639 rdr.str = trash;
640 memcpy(rdr.str, HTTP_302, rdr.len);
641
642 /* 2: add the server's prefix */
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]643 if (rdr.len + s->srv->rdr_len > rdr.size)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]644 return;
645
646 memcpy(rdr.str + rdr.len, s->srv->rdr_pfx, s->srv->rdr_len);
647 rdr.len += s->srv->rdr_len;
648
649 /* 3: add the request URI */
650 txn = &s->txn;
651 path = http_get_path(txn);
652 if (!path)
653 return;
654
655 len = txn->req.sl.rq.u_l + (txn->req.sol+txn->req.sl.rq.u) - path;
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]656 if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]657 return;
658
659 memcpy(rdr.str + rdr.len, path, len);
660 rdr.len += len;
661 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
662 rdr.len += 4;
663
664 /* prepare to return without error. */
Willy Tarreau99126c32008-11-27 10:30:51 +0100[diff] [blame]665 si->shutr(si);
666 si->shutw(si);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]667 si->err_type = SI_ET_NONE;
668 si->err_loc = NULL;
669 si->state = SI_ST_CLO;
670
671 /* send the message */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]672 http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]673
674 /* FIXME: we should increase a counter of redirects per server and per backend. */
675 if (s->srv)
Willy Tarreau7f062c42009-03-05 18:43:00 +0100[diff] [blame]676 srv_inc_sess_ctr(s->srv);
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]677}
678
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]679/* Return the error message corresponding to si->err_type. It is assumed
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]680 * that the server side is closed. Note that err_type is actually a
681 * bitmask, where almost only aborts may be cumulated with other
682 * values. We consider that aborted operations are more important
683 * than timeouts or errors due to the fact that nobody else in the
684 * logs might explain incomplete retries. All others should avoid
685 * being cumulated. It should normally not be possible to have multiple
686 * aborts at once, but just in case, the first one in sequence is reported.
687 */
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]688void http_return_srv_error(struct session *s, struct stream_interface *si)
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]689{
Willy Tarreau0cac36f2008-11-30 20:44:17 +0100[diff] [blame]690 int err_type = si->err_type;
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]691
692 if (err_type & SI_ET_QUEUE_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]693 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
694 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]695 else if (err_type & SI_ET_CONN_ABRT)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]696 http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
697 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]698 else if (err_type & SI_ET_QUEUE_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]699 http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
700 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]701 else if (err_type & SI_ET_QUEUE_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]702 http_server_error(s, si, SN_ERR_SRVCL, 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_TO)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]705 http_server_error(s, si, SN_ERR_SRVTO, 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_CONN_ERR)
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]708 http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
709 503, error_message(s, HTTP_ERR_503));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]710 else /* SI_ET_CONN_OTHER and others */
Willy Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]711 http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
712 500, error_message(s, HTTP_ERR_500));
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]713}
714
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]715extern const char sess_term_cond[8];
716extern const char sess_fin_state[8];
717extern const char *monthname[12];
718const char sess_cookie[4] = "NIDV"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie */
719const char sess_set_cookie[8] = "N1I3PD5R"; /* No set-cookie, unknown, Set-Cookie Inserted, unknown,
720 Set-cookie seen and left unchanged (passive), Set-cookie Deleted,
721 unknown, Set-cookie Rewritten */
Willy Tarreau332f8bf2007-05-13 21:36:56 +0200[diff] [blame]722struct pool_head *pool2_requri;
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]723struct pool_head *pool2_capture;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]724
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]725void http_sess_clflog(struct session *s)
726{
727 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
728 struct proxy *fe = s->fe;
729 struct proxy *be = s->be;
730 struct proxy *prx_log;
731 struct http_txn *txn = &s->txn;
732 int tolog, level, err;
733 char *uri, *h;
734 char *svid;
735 struct tm tm;
736 static char tmpline[MAX_SYSLOG_LEN];
737 int hdr;
738 size_t w;
739 int t_request;
740
741 prx_log = fe;
742 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
743 (s->conn_retries != be->conn_retries) ||
744 txn->status >= 500;
745
746 if (s->cli_addr.ss_family == AF_INET)
747 inet_ntop(AF_INET,
748 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
749 pn, sizeof(pn));
750 else
751 inet_ntop(AF_INET6,
752 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
753 pn, sizeof(pn));
754
755 get_gmtime(s->logs.accept_date.tv_sec, &tm);
756
757 /* FIXME: let's limit ourselves to frontend logging for now. */
758 tolog = fe->to_log;
759
760 h = tmpline;
761
762 w = snprintf(h, sizeof(tmpline),
763 "%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
764 pn,
765 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
766 tm.tm_hour, tm.tm_min, tm.tm_sec);
767 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
768 goto trunc;
769 h += w;
770
771 if (h >= tmpline + sizeof(tmpline) - 4)
772 goto trunc;
773
774 *(h++) = ' ';
775 *(h++) = '\"';
776 uri = txn->uri ? txn->uri : "<BADREQ>";
777 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
778 '#', url_encode_map, uri);
779 *(h++) = '\"';
780
781 w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
782 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
783 goto trunc;
784 h += w;
785
786 if (h >= tmpline + sizeof(tmpline) - 9)
787 goto trunc;
788 memcpy(h, " \"-\" \"-\"", 8);
789 h += 8;
790
791 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
792 " %d %03d",
793 (s->cli_addr.ss_family == AF_INET) ?
794 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
795 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
796 (int)s->logs.accept_date.tv_usec/1000);
797 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
798 goto trunc;
799 h += w;
800
801 w = strlen(fe->id);
802 if (h >= tmpline + sizeof(tmpline) - 4 - w)
803 goto trunc;
804 *(h++) = ' ';
805 *(h++) = '\"';
806 memcpy(h, fe->id, w);
807 h += w;
808 *(h++) = '\"';
809
810 w = strlen(be->id);
811 if (h >= tmpline + sizeof(tmpline) - 4 - w)
812 goto trunc;
813 *(h++) = ' ';
814 *(h++) = '\"';
815 memcpy(h, be->id, w);
816 h += w;
817 *(h++) = '\"';
818
819 svid = (tolog & LW_SVID) ?
820 (s->data_source != DATA_SRC_STATS) ?
821 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
822
823 w = strlen(svid);
824 if (h >= tmpline + sizeof(tmpline) - 4 - w)
825 goto trunc;
826 *(h++) = ' ';
827 *(h++) = '\"';
828 memcpy(h, svid, w);
829 h += w;
830 *(h++) = '\"';
831
832 t_request = -1;
833 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
834 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
835 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
836 " %d %ld %ld %ld %ld",
837 t_request,
838 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
839 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
840 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
841 s->logs.t_close);
842 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
843 goto trunc;
844 h += w;
845
846 if (h >= tmpline + sizeof(tmpline) - 8)
847 goto trunc;
848 *(h++) = ' ';
849 *(h++) = '\"';
850 *(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
851 *(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
852 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
853 *(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
854 *(h++) = '\"';
855
856 w = snprintf(h, sizeof(tmpline) - (h - tmpline),
857 " %d %d %d %d %d %ld %ld",
858 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
859 (s->conn_retries > 0) ? (be->conn_retries - s->conn_retries) : be->conn_retries,
860 s->logs.srv_queue_size, s->logs.prx_queue_size);
861
862 if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
863 goto trunc;
864 h += w;
865
866 if (txn->cli_cookie) {
867 w = strlen(txn->cli_cookie);
868 if (h >= tmpline + sizeof(tmpline) - 4 - w)
869 goto trunc;
870 *(h++) = ' ';
871 *(h++) = '\"';
872 memcpy(h, txn->cli_cookie, w);
873 h += w;
874 *(h++) = '\"';
875 } else {
876 if (h >= tmpline + sizeof(tmpline) - 5)
877 goto trunc;
878 memcpy(h, " \"-\"", 4);
879 h += 4;
880 }
881
882 if (txn->srv_cookie) {
883 w = strlen(txn->srv_cookie);
884 if (h >= tmpline + sizeof(tmpline) - 4 - w)
885 goto trunc;
886 *(h++) = ' ';
887 *(h++) = '\"';
888 memcpy(h, txn->srv_cookie, w);
889 h += w;
890 *(h++) = '\"';
891 } else {
892 if (h >= tmpline + sizeof(tmpline) - 5)
893 goto trunc;
894 memcpy(h, " \"-\"", 4);
895 h += 4;
896 }
897
898 if ((fe->to_log & LW_REQHDR) && txn->req.cap) {
899 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
900 if (h >= sizeof (tmpline) + tmpline - 4)
901 goto trunc;
902 *(h++) = ' ';
903 *(h++) = '\"';
904 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
905 '#', hdr_encode_map, txn->req.cap[hdr]);
906 *(h++) = '\"';
907 }
908 }
909
910 if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) {
911 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
912 if (h >= sizeof (tmpline) + tmpline - 4)
913 goto trunc;
914 *(h++) = ' ';
915 *(h++) = '\"';
916 h = encode_string(h, tmpline + sizeof(tmpline) - 2,
917 '#', hdr_encode_map, txn->rsp.cap[hdr]);
918 *(h++) = '\"';
919 }
920 }
921
922trunc:
923 *h = '\0';
924
925 level = LOG_INFO;
926 if (err && (fe->options2 & PR_O2_LOGERRORS))
927 level = LOG_ERR;
928
929 send_log(prx_log, level, "%s\n", tmpline);
930
931 s->logs.logwait = 0;
932}
933
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]934/*
935 * send a log for the session when we have enough info about it.
936 * Will not log if the frontend has no log defined.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]937 */
Willy Tarreau55a8d0e2008-11-30 18:47:21 +0100[diff] [blame]938void http_sess_log(struct session *s)
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]939{
940 char pn[INET6_ADDRSTRLEN + strlen(":65535")];
941 struct proxy *fe = s->fe;
942 struct proxy *be = s->be;
943 struct proxy *prx_log;
944 struct http_txn *txn = &s->txn;
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]945 int tolog, level, err;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]946 char *uri, *h;
947 char *svid;
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]948 struct tm tm;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]949 static char tmpline[MAX_SYSLOG_LEN];
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]950 int t_request;
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]951 int hdr;
952
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]953 /* if we don't want to log normal traffic, return now */
954 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
955 (s->conn_retries != be->conn_retries) ||
956 txn->status >= 500;
957 if (!err && (fe->options2 & PR_O2_NOLOGNORM))
958 return;
959
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]960 if (fe->logfac1 < 0 && fe->logfac2 < 0)
961 return;
962 prx_log = fe;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]963
Emeric Brun3a058f32009-06-30 18:26:00 +0200[diff] [blame]964 if (prx_log->options2 & PR_O2_CLFLOG)
965 return http_sess_clflog(s);
966
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]967 if (s->cli_addr.ss_family == AF_INET)
968 inet_ntop(AF_INET,
969 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
970 pn, sizeof(pn));
971 else
972 inet_ntop(AF_INET6,
973 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
974 pn, sizeof(pn));
975
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200[diff] [blame]976 get_localtime(s->logs.accept_date.tv_sec, &tm);
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]977
978 /* FIXME: let's limit ourselves to frontend logging for now. */
979 tolog = fe->to_log;
980
981 h = tmpline;
982 if (fe->to_log & LW_REQHDR &&
983 txn->req.cap &&
984 (h < tmpline + sizeof(tmpline) - 10)) {
985 *(h++) = ' ';
986 *(h++) = '{';
987 for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
988 if (hdr)
989 *(h++) = '|';
990 if (txn->req.cap[hdr] != NULL)
991 h = encode_string(h, tmpline + sizeof(tmpline) - 7,
992 '#', hdr_encode_map, txn->req.cap[hdr]);
993 }
994 *(h++) = '}';
995 }
996
997 if (fe->to_log & LW_RSPHDR &&
998 txn->rsp.cap &&
999 (h < tmpline + sizeof(tmpline) - 7)) {
1000 *(h++) = ' ';
1001 *(h++) = '{';
1002 for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
1003 if (hdr)
1004 *(h++) = '|';
1005 if (txn->rsp.cap[hdr] != NULL)
1006 h = encode_string(h, tmpline + sizeof(tmpline) - 4,
1007 '#', hdr_encode_map, txn->rsp.cap[hdr]);
1008 }
1009 *(h++) = '}';
1010 }
1011
1012 if (h < tmpline + sizeof(tmpline) - 4) {
1013 *(h++) = ' ';
1014 *(h++) = '"';
1015 uri = txn->uri ? txn->uri : "<BADREQ>";
1016 h = encode_string(h, tmpline + sizeof(tmpline) - 1,
1017 '#', url_encode_map, uri);
1018 *(h++) = '"';
1019 }
1020 *h = '\0';
1021
1022 svid = (tolog & LW_SVID) ?
1023 (s->data_source != DATA_SRC_STATS) ?
1024 (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
1025
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1026 t_request = -1;
1027 if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
1028 t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
1029
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200[diff] [blame]1030 level = LOG_INFO;
1031 if (err && (fe->options2 & PR_O2_LOGERRORS))
1032 level = LOG_ERR;
1033
1034 send_log(prx_log, level,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1035 "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1036 " %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld"
1037 " %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]1038 pn,
1039 (s->cli_addr.ss_family == AF_INET) ?
1040 ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
1041 ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
Willy Tarreaufe944602007-10-25 10:34:16 +0200[diff] [blame]1042 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
Willy Tarreau1772ece2009-04-03 14:49:12 +0200[diff] [blame]1043 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]1044 fe->id, be->id, svid,
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]1045 t_request,
1046 (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1047 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
1048 (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
1049 (tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
1050 txn->status,
Willy Tarreau8b3977f2008-01-18 11:16:32 +0100[diff] [blame]1051 (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1052 txn->cli_cookie ? txn->cli_cookie : "-",
1053 txn->srv_cookie ? txn->srv_cookie : "-",
1054 sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
1055 sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
1056 (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
1057 (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-',
1058 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
Krzysztof Piotr Oledzki25b501a2008-01-06 16:36:16 +0100[diff] [blame]1059 (s->flags & SN_REDISP)?"+":"",
1060 (s->conn_retries>0)?(be->conn_retries - s->conn_retries):be->conn_retries,
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1061 s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline);
1062
1063 s->logs.logwait = 0;
1064}
1065
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1066
1067/*
1068 * Capture headers from message starting at <som> according to header list
1069 * <cap_hdr>, and fill the <idx> structure appropriately.
1070 */
1071void capture_headers(char *som, struct hdr_idx *idx,
1072 char **cap, struct cap_hdr *cap_hdr)
1073{
1074 char *eol, *sol, *col, *sov;
1075 int cur_idx;
1076 struct cap_hdr *h;
1077 int len;
1078
1079 sol = som + hdr_idx_first_pos(idx);
1080 cur_idx = hdr_idx_first_idx(idx);
1081
1082 while (cur_idx) {
1083 eol = sol + idx->v[cur_idx].len;
1084
1085 col = sol;
1086 while (col < eol && *col != ':')
1087 col++;
1088
1089 sov = col + 1;
1090 while (sov < eol && http_is_lws[(unsigned char)*sov])
1091 sov++;
1092
1093 for (h = cap_hdr; h; h = h->next) {
1094 if ((h->namelen == col - sol) &&
1095 (strncasecmp(sol, h->name, h->namelen) == 0)) {
1096 if (cap[h->index] == NULL)
1097 cap[h->index] =
Willy Tarreaucf7f3202007-05-13 22:46:04 +0200[diff] [blame]1098 pool_alloc2(h->pool);
Willy Tarreau117f59e2007-03-04 18:17:17 +0100[diff] [blame]1099
1100 if (cap[h->index] == NULL) {
1101 Alert("HTTP capture : out of memory.\n");
1102 continue;
1103 }
1104
1105 len = eol - sov;
1106 if (len > h->len)
1107 len = h->len;
1108
1109 memcpy(cap[h->index], sov, len);
1110 cap[h->index][len]=0;
1111 }
1112 }
1113 sol = eol + idx->v[cur_idx].cr + 1;
1114 cur_idx = idx->v[cur_idx].next;
1115 }
1116}
1117
1118
Willy Tarreau42250582007-04-01 01:30:43 +0200[diff] [blame]1119/* either we find an LF at <ptr> or we jump to <bad>.
1120 */
1121#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
1122
1123/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
1124 * otherwise to <http_msg_ood> with <state> set to <st>.
1125 */
1126#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
1127 ptr++; \
1128 if (likely(ptr < end)) \
1129 goto good; \
1130 else { \
1131 state = (st); \
1132 goto http_msg_ood; \
1133 } \
1134 } while (0)
1135
1136
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1137/*
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1138 * This function parses a status line between <ptr> and <end>, starting with
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1139 * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
1140 * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
1141 * will give undefined results.
1142 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1143 * and that msg->sol points to the beginning of the response.
1144 * If a complete line is found (which implies that at least one CR or LF is
1145 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1146 * returned indicating an incomplete line (which does not mean that parts have
1147 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1148 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1149 * upon next call.
1150 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1151 * This function was intentionally designed to be called from
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1152 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1153 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1154 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1155 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1156const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
1157 unsigned int state, const char *ptr, const char *end,
1158 char **ret_ptr, unsigned int *ret_state)
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1159{
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1160 switch (state) {
1161 http_msg_rpver:
1162 case HTTP_MSG_RPVER:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1163 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1164 EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
1165
1166 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1167 msg->sl.st.v_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1168 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1169 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1170 state = HTTP_MSG_ERROR;
1171 break;
1172
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1173 http_msg_rpver_sp:
1174 case HTTP_MSG_RPVER_SP:
1175 if (likely(!HTTP_IS_LWS(*ptr))) {
1176 msg->sl.st.c = ptr - msg_buf;
1177 goto http_msg_rpcode;
1178 }
1179 if (likely(HTTP_IS_SPHT(*ptr)))
1180 EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
1181 /* so it's a CR/LF, this is invalid */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1182 state = HTTP_MSG_ERROR;
1183 break;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1184
1185 http_msg_rpcode:
1186 case HTTP_MSG_RPCODE:
1187 if (likely(!HTTP_IS_LWS(*ptr)))
1188 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
1189
1190 if (likely(HTTP_IS_SPHT(*ptr))) {
1191 msg->sl.st.c_l = (ptr - msg_buf) - msg->sl.st.c;
1192 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1193 }
1194
1195 /* so it's a CR/LF, so there is no reason phrase */
1196 msg->sl.st.c_l = (ptr - msg_buf) - msg->sl.st.c;
1197 http_msg_rsp_reason:
1198 /* FIXME: should we support HTTP responses without any reason phrase ? */
1199 msg->sl.st.r = ptr - msg_buf;
1200 msg->sl.st.r_l = 0;
1201 goto http_msg_rpline_eol;
1202
1203 http_msg_rpcode_sp:
1204 case HTTP_MSG_RPCODE_SP:
1205 if (likely(!HTTP_IS_LWS(*ptr))) {
1206 msg->sl.st.r = ptr - msg_buf;
1207 goto http_msg_rpreason;
1208 }
1209 if (likely(HTTP_IS_SPHT(*ptr)))
1210 EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
1211 /* so it's a CR/LF, so there is no reason phrase */
1212 goto http_msg_rsp_reason;
1213
1214 http_msg_rpreason:
1215 case HTTP_MSG_RPREASON:
1216 if (likely(!HTTP_IS_CRLF(*ptr)))
1217 EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
1218 msg->sl.st.r_l = (ptr - msg_buf) - msg->sl.st.r;
1219 http_msg_rpline_eol:
1220 /* We have seen the end of line. Note that we do not
1221 * necessarily have the \n yet, but at least we know that we
1222 * have EITHER \r OR \n, otherwise the response would not be
1223 * complete. We can then record the response length and return
1224 * to the caller which will be able to register it.
1225 */
1226 msg->sl.st.l = ptr - msg->sol;
1227 return ptr;
1228
1229#ifdef DEBUG_FULL
1230 default:
1231 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1232 exit(1);
1233#endif
1234 }
1235
1236 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1237 /* out of valid data */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1238 if (ret_state)
1239 *ret_state = state;
1240 if (ret_ptr)
1241 *ret_ptr = (char *)ptr;
1242 return NULL;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1243}
1244
1245
1246/*
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1247 * This function parses a request line between <ptr> and <end>, starting with
1248 * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
1249 * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
1250 * will give undefined results.
1251 * Note that it is upon the caller's responsibility to ensure that ptr < end,
1252 * and that msg->sol points to the beginning of the request.
1253 * If a complete line is found (which implies that at least one CR or LF is
1254 * found before <end>, the updated <ptr> is returned, otherwise NULL is
1255 * returned indicating an incomplete line (which does not mean that parts have
1256 * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
1257 * non-NULL, they are fed with the new <ptr> and <state> values to be passed
1258 * upon next call.
1259 *
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1260 * This function was intentionally designed to be called from
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1261 * http_msg_analyzer() with the lowest overhead. It should integrate perfectly
1262 * within its state machine and use the same macros, hence the need for same
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1263 * labels and variable names. Note that msg->sol is left unchanged.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1264 */
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1265const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
1266 unsigned int state, const char *ptr, const char *end,
1267 char **ret_ptr, unsigned int *ret_state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]1268{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1269 switch (state) {
1270 http_msg_rqmeth:
1271 case HTTP_MSG_RQMETH:
1272 if (likely(HTTP_IS_TOKEN(*ptr)))
1273 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1274
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1275 if (likely(HTTP_IS_SPHT(*ptr))) {
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1276 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1277 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1278 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1279
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1280 if (likely(HTTP_IS_CRLF(*ptr))) {
1281 /* HTTP 0.9 request */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1282 msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1283 http_msg_req09_uri:
1284 msg->sl.rq.u = ptr - msg_buf;
1285 http_msg_req09_uri_e:
1286 msg->sl.rq.u_l = (ptr - msg_buf) - msg->sl.rq.u;
1287 http_msg_req09_ver:
1288 msg->sl.rq.v = ptr - msg_buf;
1289 msg->sl.rq.v_l = 0;
1290 goto http_msg_rqline_eol;
1291 }
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1292 state = HTTP_MSG_ERROR;
1293 break;
1294
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1295 http_msg_rqmeth_sp:
1296 case HTTP_MSG_RQMETH_SP:
1297 if (likely(!HTTP_IS_LWS(*ptr))) {
1298 msg->sl.rq.u = ptr - msg_buf;
1299 goto http_msg_rquri;
1300 }
1301 if (likely(HTTP_IS_SPHT(*ptr)))
1302 EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
1303 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1304 goto http_msg_req09_uri;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1305
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1306 http_msg_rquri:
1307 case HTTP_MSG_RQURI:
1308 if (likely(!HTTP_IS_LWS(*ptr)))
1309 EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1310
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1311 if (likely(HTTP_IS_SPHT(*ptr))) {
1312 msg->sl.rq.u_l = (ptr - msg_buf) - msg->sl.rq.u;
1313 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1314 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1315
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1316 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1317 goto http_msg_req09_uri_e;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1318
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1319 http_msg_rquri_sp:
1320 case HTTP_MSG_RQURI_SP:
1321 if (likely(!HTTP_IS_LWS(*ptr))) {
1322 msg->sl.rq.v = ptr - msg_buf;
1323 goto http_msg_rqver;
1324 }
1325 if (likely(HTTP_IS_SPHT(*ptr)))
1326 EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
1327 /* so it's a CR/LF, meaning an HTTP 0.9 request */
1328 goto http_msg_req09_ver;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1329
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1330 http_msg_rqver:
1331 case HTTP_MSG_RQVER:
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1332 if (likely(HTTP_IS_VER_TOKEN(*ptr)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1333 EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
Willy Tarreau4b89ad42007-03-04 18:13:58 +0100[diff] [blame]1334
1335 if (likely(HTTP_IS_CRLF(*ptr))) {
1336 msg->sl.rq.v_l = (ptr - msg_buf) - msg->sl.rq.v;
1337 http_msg_rqline_eol:
1338 /* We have seen the end of line. Note that we do not
1339 * necessarily have the \n yet, but at least we know that we
1340 * have EITHER \r OR \n, otherwise the request would not be
1341 * complete. We can then record the request length and return
1342 * to the caller which will be able to register it.
1343 */
1344 msg->sl.rq.l = ptr - msg->sol;
1345 return ptr;
1346 }
1347
1348 /* neither an HTTP_VER token nor a CRLF */
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1349 state = HTTP_MSG_ERROR;
1350 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1351
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1352#ifdef DEBUG_FULL
1353 default:
1354 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1355 exit(1);
1356#endif
1357 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1358
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1359 http_msg_ood:
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1360 /* out of valid data */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1361 if (ret_state)
1362 *ret_state = state;
1363 if (ret_ptr)
1364 *ret_ptr = (char *)ptr;
1365 return NULL;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1366}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1367
1368
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1369/*
1370 * This function parses an HTTP message, either a request or a response,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1371 * depending on the initial msg->msg_state. It can be preempted everywhere
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1372 * when data are missing and recalled at the exact same location with no
1373 * information loss. The header index is re-initialized when switching from
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1374 * MSG_R[PQ]BEFORE to MSG_RPVER|MSG_RQMETH. It modifies msg->sol among other
1375 * fields.
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1376 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1377void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx)
1378{
Willy Tarreaue69eada2008-01-27 00:34:10 +0100[diff] [blame]1379 unsigned int state; /* updated only when leaving the FSM */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1380 register char *ptr, *end; /* request pointers, to avoid dereferences */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1381
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1382 state = msg->msg_state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1383 ptr = buf->lr;
1384 end = buf->r;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1385
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1386 if (unlikely(ptr >= end))
1387 goto http_msg_ood;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1388
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1389 switch (state) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1390 /*
1391 * First, states that are specific to the response only.
1392 * We check them first so that request and headers are
1393 * closer to each other (accessed more often).
1394 */
1395 http_msg_rpbefore:
1396 case HTTP_MSG_RPBEFORE:
1397 if (likely(HTTP_IS_TOKEN(*ptr))) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1398#if !defined(PARSE_PRESERVE_EMPTY_LINES)
1399 if (likely(ptr != buf->data)) {
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1400 /* Remove empty leading lines, as recommended by
1401 * RFC2616. This takes a lot of time because we
1402 * must move all the buffer backwards, but this
1403 * is rarely needed. The method above will be
1404 * cleaner when we'll be able to start sending
1405 * the request from any place in the buffer.
1406 */
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1407 ptr += buffer_replace2(buf, buf->lr, ptr, NULL, 0);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1408 end = buf->r;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1409 }
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]1410#endif
1411 msg->sol = ptr;
1412 msg->som = ptr - buf->data;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1413 hdr_idx_init(idx);
1414 state = HTTP_MSG_RPVER;
1415 goto http_msg_rpver;
1416 }
1417
1418 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1419 goto http_msg_invalid;
1420
1421 if (unlikely(*ptr == '\n'))
1422 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1423 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1424 /* stop here */
1425
1426 http_msg_rpbefore_cr:
1427 case HTTP_MSG_RPBEFORE_CR:
1428 EXPECT_LF_HERE(ptr, http_msg_invalid);
1429 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1430 /* stop here */
1431
1432 http_msg_rpver:
1433 case HTTP_MSG_RPVER:
1434 case HTTP_MSG_RPVER_SP:
1435 case HTTP_MSG_RPCODE:
1436 case HTTP_MSG_RPCODE_SP:
1437 case HTTP_MSG_RPREASON:
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1438 ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1439 &buf->lr, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1440 if (unlikely(!ptr))
1441 return;
1442
1443 /* we have a full response and we know that we have either a CR
1444 * or an LF at <ptr>.
1445 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1446 //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]1447 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1448
1449 msg->sol = ptr;
1450 if (likely(*ptr == '\r'))
1451 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1452 goto http_msg_rpline_end;
1453
1454 http_msg_rpline_end:
1455 case HTTP_MSG_RPLINE_END:
1456 /* msg->sol must point to the first of CR or LF. */
1457 EXPECT_LF_HERE(ptr, http_msg_invalid);
1458 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1459 /* stop here */
1460
1461 /*
1462 * Second, states that are specific to the request only
1463 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1464 http_msg_rqbefore:
1465 case HTTP_MSG_RQBEFORE:
1466 if (likely(HTTP_IS_TOKEN(*ptr))) {
1467 if (likely(ptr == buf->data)) {
1468 msg->sol = ptr;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1469 msg->som = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1470 } else {
1471#if PARSE_PRESERVE_EMPTY_LINES
1472 /* only skip empty leading lines, don't remove them */
1473 msg->sol = ptr;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1474 msg->som = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1475#else
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1476 /* Remove empty leading lines, as recommended by
1477 * RFC2616. This takes a lot of time because we
1478 * must move all the buffer backwards, but this
1479 * is rarely needed. The method above will be
1480 * cleaner when we'll be able to start sending
1481 * the request from any place in the buffer.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1482 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1483 buf->lr = ptr;
1484 buffer_replace2(buf, buf->data, buf->lr, NULL, 0);
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1485 msg->som = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1486 msg->sol = buf->data;
1487 ptr = buf->data;
1488 end = buf->r;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1489#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1490 }
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1491 /* we will need this when keep-alive will be supported
1492 hdr_idx_init(idx);
1493 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1494 state = HTTP_MSG_RQMETH;
1495 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1496 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1497
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1498 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1499 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1500
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1501 if (unlikely(*ptr == '\n'))
1502 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1503 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1504 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1505
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1506 http_msg_rqbefore_cr:
1507 case HTTP_MSG_RQBEFORE_CR:
1508 EXPECT_LF_HERE(ptr, http_msg_invalid);
1509 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1510 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1511
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1512 http_msg_rqmeth:
1513 case HTTP_MSG_RQMETH:
1514 case HTTP_MSG_RQMETH_SP:
1515 case HTTP_MSG_RQURI:
1516 case HTTP_MSG_RQURI_SP:
1517 case HTTP_MSG_RQVER:
1518 ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1519 &buf->lr, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1520 if (unlikely(!ptr))
1521 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1522
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1523 /* we have a full request and we know that we have either a CR
1524 * or an LF at <ptr>.
1525 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1526 //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]1527 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1528
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1529 msg->sol = ptr;
1530 if (likely(*ptr == '\r'))
1531 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1532 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1533
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1534 http_msg_rqline_end:
1535 case HTTP_MSG_RQLINE_END:
1536 /* check for HTTP/0.9 request : no version information available.
1537 * msg->sol must point to the first of CR or LF.
1538 */
1539 if (unlikely(msg->sl.rq.v_l == 0))
1540 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1541
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1542 EXPECT_LF_HERE(ptr, http_msg_invalid);
1543 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1544 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1545
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1546 /*
1547 * Common states below
1548 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1549 http_msg_hdr_first:
1550 case HTTP_MSG_HDR_FIRST:
1551 msg->sol = ptr;
1552 if (likely(!HTTP_IS_CRLF(*ptr))) {
1553 goto http_msg_hdr_name;
1554 }
1555
1556 if (likely(*ptr == '\r'))
1557 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1558 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1559
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1560 http_msg_hdr_name:
1561 case HTTP_MSG_HDR_NAME:
1562 /* assumes msg->sol points to the first char */
1563 if (likely(HTTP_IS_TOKEN(*ptr)))
1564 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1565
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1566 if (likely(*ptr == ':')) {
1567 msg->col = ptr - buf->data;
1568 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
1569 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1570
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1571 if (likely(msg->err_pos < -1) || *ptr == '\n')
1572 goto http_msg_invalid;
1573
1574 if (msg->err_pos == -1) /* capture error pointer */
1575 msg->err_pos = ptr - buf->data; /* >= 0 now */
1576
1577 /* and we still accept this non-token character */
1578 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1579
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1580 http_msg_hdr_l1_sp:
1581 case HTTP_MSG_HDR_L1_SP:
1582 /* assumes msg->sol points to the first char and msg->col to the colon */
1583 if (likely(HTTP_IS_SPHT(*ptr)))
1584 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]1585
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1586 /* header value can be basically anything except CR/LF */
1587 msg->sov = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1588
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1589 if (likely(!HTTP_IS_CRLF(*ptr))) {
1590 goto http_msg_hdr_val;
1591 }
1592
1593 if (likely(*ptr == '\r'))
1594 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1595 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1596
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1597 http_msg_hdr_l1_lf:
1598 case HTTP_MSG_HDR_L1_LF:
1599 EXPECT_LF_HERE(ptr, http_msg_invalid);
1600 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]1601
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1602 http_msg_hdr_l1_lws:
1603 case HTTP_MSG_HDR_L1_LWS:
1604 if (likely(HTTP_IS_SPHT(*ptr))) {
1605 /* replace HT,CR,LF with spaces */
1606 for (; buf->data+msg->sov < ptr; msg->sov++)
1607 buf->data[msg->sov] = ' ';
1608 goto http_msg_hdr_l1_sp;
1609 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1610 /* we had a header consisting only in spaces ! */
1611 msg->eol = buf->data + msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1612 goto http_msg_complete_header;
1613
1614 http_msg_hdr_val:
1615 case HTTP_MSG_HDR_VAL:
1616 /* assumes msg->sol points to the first char, msg->col to the
1617 * colon, and msg->sov points to the first character of the
1618 * value.
1619 */
1620 if (likely(!HTTP_IS_CRLF(*ptr)))
1621 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1622
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1623 msg->eol = ptr;
1624 /* Note: we could also copy eol into ->eoh so that we have the
1625 * real header end in case it ends with lots of LWS, but is this
1626 * really needed ?
1627 */
1628 if (likely(*ptr == '\r'))
1629 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1630 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1631
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1632 http_msg_hdr_l2_lf:
1633 case HTTP_MSG_HDR_L2_LF:
1634 EXPECT_LF_HERE(ptr, http_msg_invalid);
1635 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]1636
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1637 http_msg_hdr_l2_lws:
1638 case HTTP_MSG_HDR_L2_LWS:
1639 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1640 /* LWS: replace HT,CR,LF with spaces */
1641 for (; msg->eol < ptr; msg->eol++)
1642 *msg->eol = ' ';
1643 goto http_msg_hdr_val;
1644 }
1645 http_msg_complete_header:
1646 /*
1647 * It was a new header, so the last one is finished.
1648 * Assumes msg->sol points to the first char, msg->col to the
1649 * colon, msg->sov points to the first character of the value
1650 * and msg->eol to the first CR or LF so we know how the line
1651 * ends. We insert last header into the index.
1652 */
1653 /*
1654 fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
1655 write(2, msg->sol, msg->eol-msg->sol);
1656 fprintf(stderr,"\n");
1657 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1658
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1659 if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
1660 idx, idx->tail) < 0))
1661 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1662
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1663 msg->sol = ptr;
1664 if (likely(!HTTP_IS_CRLF(*ptr))) {
1665 goto http_msg_hdr_name;
1666 }
1667
1668 if (likely(*ptr == '\r'))
1669 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1670 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1671
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1672 http_msg_last_lf:
1673 case HTTP_MSG_LAST_LF:
1674 /* Assumes msg->sol points to the first of either CR or LF */
1675 EXPECT_LF_HERE(ptr, http_msg_invalid);
1676 ptr++;
1677 buf->lr = ptr;
1678 msg->eoh = msg->sol - buf->data;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1679 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1680 return;
1681#ifdef DEBUG_FULL
1682 default:
1683 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1684 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1685#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1686 }
1687 http_msg_ood:
1688 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1689 msg->msg_state = state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1690 buf->lr = ptr;
1691 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1692
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1693 http_msg_invalid:
1694 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1695 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1696 buf->lr = ptr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1697 return;
1698}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1699
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1700/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1701 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1702 * nothing is done and 1 is returned.
1703 */
1704static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
1705{
1706 int delta;
1707 char *cur_end;
1708
1709 if (msg->sl.rq.v_l != 0)
1710 return 1;
1711
1712 msg->sol = req->data + msg->som;
1713 cur_end = msg->sol + msg->sl.rq.l;
1714 delta = 0;
1715
1716 if (msg->sl.rq.u_l == 0) {
1717 /* if no URI was set, add "/" */
1718 delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
1719 cur_end += delta;
1720 msg->eoh += delta;
1721 }
1722 /* add HTTP version */
1723 delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
1724 msg->eoh += delta;
1725 cur_end += delta;
1726 cur_end = (char *)http_parse_reqline(msg, req->data,
1727 HTTP_MSG_RQMETH,
1728 msg->sol, cur_end + 1,
1729 NULL, NULL);
1730 if (unlikely(!cur_end))
1731 return 0;
1732
1733 /* we have a full HTTP/1.0 request now and we know that
1734 * we have either a CR or an LF at <ptr>.
1735 */
1736 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1737 return 1;
1738}
1739
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1740/* This stream analyser waits for a complete HTTP request. It returns 1 if the
1741 * processing can continue on next analysers, or zero if it either needs more
1742 * data or wants to immediately abort the request (eg: timeout, error, ...). It
1743 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
1744 * when it has nothing left to do, and may remove any analyser when it wants to
1745 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1746 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]1747int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1748{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1749 /*
1750 * We will parse the partial (or complete) lines.
1751 * We will check the request syntax, and also join multi-line
1752 * headers. An index of all the lines will be elaborated while
1753 * parsing.
1754 *
1755 * For the parsing, we use a 28 states FSM.
1756 *
1757 * Here is the information we currently have :
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]1758 * req->data + msg->som = beginning of request
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1759 * req->data + req->eoh = end of processed headers / start of current one
1760 * req->data + req->eol = end of current header or line (LF or CRLF)
1761 * req->lr = first non-visited byte
1762 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1763 *
1764 * At end of parsing, we may perform a capture of the error (if any), and
1765 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
1766 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
1767 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1768 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1769
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1770 int cur_idx;
1771 struct http_txn *txn = &s->txn;
1772 struct http_msg *msg = &txn->req;
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]1773 struct hdr_ctx ctx;
1774 int conn_ka, conn_cl;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1775
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]1776 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
1777 now_ms, __FUNCTION__,
1778 s,
1779 req,
1780 req->rex, req->wex,
1781 req->flags,
1782 req->l,
1783 req->analysers);
1784
Willy Tarreau52a0c602009-08-16 22:45:38 +0200[diff] [blame]1785 /* we're speaking HTTP here, so let's speak HTTP to the client */
1786 s->srv_error = http_return_srv_error;
1787
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1788 if (likely(req->lr < req->r))
1789 http_msg_analyzer(req, msg, &txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1790
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1791 /* 1: we might have to print this header in debug mode */
1792 if (unlikely((global.mode & MODE_DEBUG) &&
1793 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
1794 (msg->msg_state == HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
1795 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1796
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1797 sol = req->data + msg->som;
1798 eol = sol + msg->sl.rq.l;
1799 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]1800
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1801 sol += hdr_idx_first_pos(&txn->hdr_idx);
1802 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1803
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1804 while (cur_idx) {
1805 eol = sol + txn->hdr_idx.v[cur_idx].len;
1806 debug_hdr("clihdr", s, sol, eol);
1807 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
1808 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1809 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1810 }
1811
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1812
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1813 /*
1814 * Now we quickly check if we have found a full valid request.
1815 * If not so, we check the FD and buffer states before leaving.
1816 * A full request is indicated by the fact that we have seen
1817 * the double LF/CRLF, so the state is HTTP_MSG_BODY. Invalid
1818 * requests are checked first.
1819 *
1820 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1821
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1822 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1823 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1824 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1825 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1826 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
1827 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1828
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1829 /* 1: Since we are in header mode, if there's no space
1830 * left for headers, we won't be able to free more
1831 * later, so the session will never terminate. We
1832 * must terminate it now.
1833 */
1834 if (unlikely(req->flags & BF_FULL)) {
1835 /* FIXME: check if URI is set and return Status
1836 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1837 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1838 goto return_bad_req;
1839 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1840
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1841 /* 2: have we encountered a read error ? */
1842 else if (req->flags & BF_READ_ERROR) {
1843 /* we cannot return any message on error */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]1844 if (msg->err_pos >= 0)
1845 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1846 msg->msg_state = HTTP_MSG_ERROR;
1847 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]1848
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]1849 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]1850 if (s->listener->counters)
1851 s->listener->counters->failed_req++;
1852
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1853 if (!(s->flags & SN_ERR_MASK))
1854 s->flags |= SN_ERR_CLICL;
1855 if (!(s->flags & SN_FINST_MASK))
1856 s->flags |= SN_FINST_R;
1857 return 0;
1858 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]1859
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1860 /* 3: has the read timeout expired ? */
1861 else if (req->flags & BF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
1862 /* read timeout : give up with an error message. */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]1863 if (msg->err_pos >= 0)
1864 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1865 txn->status = 408;
1866 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
1867 msg->msg_state = HTTP_MSG_ERROR;
1868 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]1869
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]1870 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]1871 if (s->listener->counters)
1872 s->listener->counters->failed_req++;
1873
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1874 if (!(s->flags & SN_ERR_MASK))
1875 s->flags |= SN_ERR_CLITO;
1876 if (!(s->flags & SN_FINST_MASK))
1877 s->flags |= SN_FINST_R;
1878 return 0;
1879 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]1880
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1881 /* 4: have we encountered a close ? */
1882 else if (req->flags & BF_SHUTR) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]1883 if (msg->err_pos >= 0)
1884 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1885 txn->status = 400;
1886 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
1887 msg->msg_state = HTTP_MSG_ERROR;
1888 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]1889
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]1890 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]1891 if (s->listener->counters)
1892 s->listener->counters->failed_req++;
1893
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1894 if (!(s->flags & SN_ERR_MASK))
1895 s->flags |= SN_ERR_CLICL;
1896 if (!(s->flags & SN_FINST_MASK))
1897 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]1898 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1899 }
1900
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]1901 buffer_dont_connect(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]1902 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
1903
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1904 /* just set the request timeout once at the beginning of the request */
1905 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]1906 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1907
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1908 /* we're not ready yet */
1909 return 0;
1910 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1911
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1912 /* OK now we have a complete HTTP request with indexed headers. Let's
1913 * complete the request parsing by setting a few fields we will need
1914 * later.
1915 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1916
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1917 /* Maybe we found in invalid header name while we were configured not
1918 * to block on that, so we have to capture it now.
1919 */
1920 if (unlikely(msg->err_pos >= 0))
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]1921 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
1922
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1923 /* ensure we keep this pointer to the beginning of the message */
1924 msg->sol = req->data + msg->som;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1925
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1926 /*
1927 * 1: identify the method
1928 */
1929 txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
1930
1931 /* we can make use of server redirect on GET and HEAD */
1932 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
1933 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]1934
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1935 /*
1936 * 2: check if the URI matches the monitor_uri.
1937 * We have to do this for every request which gets in, because
1938 * the monitor-uri is defined by the frontend.
1939 */
1940 if (unlikely((s->fe->monitor_uri_len != 0) &&
1941 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
1942 !memcmp(&req->data[msg->sl.rq.u],
1943 s->fe->monitor_uri,
1944 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1945 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1946 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1947 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1948 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1949
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1950 s->flags |= SN_MONITOR;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1951
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1952 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1953 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
1954 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1955
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1956 ret = acl_pass(ret);
1957 if (cond->pol == ACL_COND_UNLESS)
1958 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1959
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1960 if (ret) {
1961 /* we fail this request, let's return 503 service unavail */
1962 txn->status = 503;
1963 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
1964 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1965 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1966 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]1967
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1968 /* nothing to fail, let's reply normaly */
1969 txn->status = 200;
1970 stream_int_retnclose(req->prod, &http_200_chunk);
1971 goto return_prx_cond;
1972 }
1973
1974 /*
1975 * 3: Maybe we have to copy the original REQURI for the logs ?
1976 * Note: we cannot log anymore if the request has been
1977 * classified as invalid.
1978 */
1979 if (unlikely(s->logs.logwait & LW_REQ)) {
1980 /* we have a complete HTTP request that we must log */
1981 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
1982 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1983
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1984 if (urilen >= REQURI_LEN)
1985 urilen = REQURI_LEN - 1;
1986 memcpy(txn->uri, &req->data[msg->som], urilen);
1987 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1988
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1989 if (!(s->logs.logwait &= ~LW_REQ))
1990 s->do_log(s);
1991 } else {
1992 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1993 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1994 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]1995
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1996 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1997 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
1998 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1999
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2000 /* 5: we may need to capture headers */
2001 if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
2002 capture_headers(req->data + msg->som, &txn->hdr_idx,
2003 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2004
Willy Tarreau32b47f42009-10-18 20:55:02 +0200[diff] [blame]2005 /* 6: determine if we have a transfer-encoding or content-length.
2006 * RFC2616 #4.4 states that :
2007 * - If a Transfer-Encoding header field is present and has any value
2008 * other than "identity", then the transfer-length is defined by use
2009 * of the "chunked" transfer-coding ;
2010 *
2011 * - If a Content-Length header field is present, its decimal value in
2012 * OCTETs represents both the entity-length and the transfer-length.
2013 * If a message is received with both a Transfer-Encoding header
2014 * field and a Content-Length header field, the latter MUST be ignored.
2015 *
2016 * - If a request contains a message-body and a Content-Length is not
2017 * given, the server SHOULD respond with 400 (bad request) if it
2018 * cannot determine the length of the message, or with 411 (length
2019 * required) if it wishes to insist on receiving a valid Content-Length.
2020 */
2021
2022 /* FIXME: chunked encoding is HTTP/1.1 only */
2023 ctx.idx = 0;
2024 while (http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
2025 if (ctx.vlen == 8 && strncasecmp(ctx.line + ctx.val, "identity", 8) == 0)
2026 continue;
2027 txn->flags |= TX_REQ_TE_CHNK;
2028 break;
2029 }
2030
2031 /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
2032 ctx.idx = 0;
2033 while (!(txn->flags & TX_REQ_TE_CHNK) &&
2034 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
2035 signed long long cl;
2036
2037 if (!ctx.vlen)
2038 goto return_bad_req;
2039
2040 if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
2041 goto return_bad_req; /* parse failure */
2042
2043 if (cl < 0)
2044 goto return_bad_req;
2045
2046 if ((txn->flags & TX_REQ_CNT_LEN) && (msg->hdr_content_len != cl))
2047 goto return_bad_req; /* already specified, was different */
2048
2049 txn->flags |= TX_REQ_CNT_LEN;
2050 msg->hdr_content_len = cl;
2051 }
2052
2053 /* Determine if the client wishes keep-alive or close.
2054 * RFC2616 #8.1.2 and #14.10 state that HTTP/1.1 and above connections
2055 * are persistent unless "Connection: close" is explicitly specified.
2056 * RFC2616 #19.6.2 refers to RFC2068 for HTTP/1.0 persistent connections.
2057 * RFC2068 #19.7.1 states that HTTP/1.0 clients are not persistent unless
2058 * they explicitly specify "Connection: keep-alive", regardless of any
2059 * optional "keep-alive" header.
2060 */
2061
2062 /* FIXME: should we also remove any header specified in "connection" ? */
2063 conn_ka = conn_cl = 0;
2064 ctx.idx = 0;
2065 while (http_find_header2("Connection", 10, msg->sol, &txn->hdr_idx, &ctx)) {
2066 if (ctx.vlen == 5 && strncasecmp(ctx.line + ctx.val, "close", 5) == 0)
2067 conn_cl = 1;
2068 else if (ctx.vlen == 10 && strncasecmp(ctx.line + ctx.val, "keep-alive", 10) == 0)
2069 conn_ka = 1;
2070 }
2071
2072 if ((msg->sl.rq.v_l == 8) &&
2073 (req->data[msg->som + msg->sl.rq.v + 5] == '1') &&
2074 (req->data[msg->som + msg->sl.rq.v + 7] == '0')) {
2075 /* HTTP/1.0 */
2076 if (conn_ka)
2077 txn->flags |= (TX_CLI_CONN_KA | TX_SRV_CONN_KA);
2078 } else {
2079 /* HTTP/1.0 */
2080 if (!conn_cl)
2081 txn->flags |= (TX_CLI_CONN_KA | TX_SRV_CONN_KA);
2082 }
2083
2084 /* we can mark the connection as non-persistent if needed */
2085 if (!(txn->flags & TX_SRV_CONN_KA))
2086 s->flags |= SN_CONN_CLOSED;
2087
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2088 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2089 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2090 req->analyse_exp = TICK_ETERNITY;
2091 return 1;
2092
2093 return_bad_req:
2094 /* We centralize bad requests processing here */
2095 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2096 /* we detected a parsing error. We want to archive this request
2097 * in the dedicated proxy area for later troubleshooting.
2098 */
2099 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2100 }
2101
2102 txn->req.msg_state = HTTP_MSG_ERROR;
2103 txn->status = 400;
2104 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2105
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2106 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2107 if (s->listener->counters)
2108 s->listener->counters->failed_req++;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2109
2110 return_prx_cond:
2111 if (!(s->flags & SN_ERR_MASK))
2112 s->flags |= SN_ERR_PRXCOND;
2113 if (!(s->flags & SN_FINST_MASK))
2114 s->flags |= SN_FINST_R;
2115
2116 req->analysers = 0;
2117 req->analyse_exp = TICK_ETERNITY;
2118 return 0;
2119}
2120
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2121/* This stream analyser runs all HTTP request processing which is common to
2122 * frontends and backends, which means blocking ACLs, filters, connection-close,
2123 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2124 * 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]2125 * either needs more data or wants to immediately abort the request (eg: deny,
2126 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2127 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2128int 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]2129{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2130 struct http_txn *txn = &s->txn;
2131 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2132 struct acl_cond *cond;
2133 struct redirect_rule *rule;
2134 int cur_idx;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2135
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2136 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
2137 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2138 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2139 return 0;
2140 }
2141
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2142 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2143 req->analyse_exp = TICK_ETERNITY;
2144
2145 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2146 now_ms, __FUNCTION__,
2147 s,
2148 req,
2149 req->rex, req->wex,
2150 req->flags,
2151 req->l,
2152 req->analysers);
2153
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2154 /* first check whether we have some ACLs set to block this request */
2155 list_for_each_entry(cond, &px->block_cond, list) {
2156 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]2157
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2158 ret = acl_pass(ret);
2159 if (cond->pol == ACL_COND_UNLESS)
2160 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]2161
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2162 if (ret) {
2163 txn->status = 403;
2164 /* let's log the request time */
2165 s->logs.tv_request = now;
2166 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2167 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2168 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2169 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2170
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2171 /* try headers filters */
2172 if (px->req_exp != NULL) {
2173 if (apply_filters_to_request(s, req, px->req_exp) < 0)
2174 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2175
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2176 /* has the request been denied ? */
2177 if (txn->flags & TX_CLDENY) {
2178 /* no need to go further */
2179 txn->status = 403;
2180 /* let's log the request time */
2181 s->logs.tv_request = now;
2182 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2183 goto return_prx_cond;
2184 }
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2185
2186 /* When a connection is tarpitted, we use the tarpit timeout,
2187 * which may be the same as the connect timeout if unspecified.
2188 * If unset, then set it to zero because we really want it to
2189 * eventually expire. We build the tarpit as an analyser.
2190 */
2191 if (txn->flags & TX_CLTARPIT) {
2192 buffer_erase(s->req);
2193 /* wipe the request out so that we can drop the connection early
2194 * if the client closes first.
2195 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2196 buffer_dont_connect(req);
Willy Tarreauc465fd72009-08-31 00:17:18 +0200[diff] [blame]2197 req->analysers = 0; /* remove switching rules etc... */
2198 req->analysers |= AN_REQ_HTTP_TARPIT;
2199 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
2200 if (!req->analyse_exp)
2201 req->analyse_exp = tick_add(now_ms, 0);
2202 return 1;
2203 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2204 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2205
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2206 /* We might have to check for "Connection:". The test for persistent
2207 * connections has already been performed, so we only enter here if
2208 * we are certain the connection is persistent.
2209 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2210 if (((s->fe->options | s->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
2211 !(s->flags & SN_CONN_CLOSED)) {
2212 char *cur_ptr, *cur_end, *cur_next;
2213 int old_idx, delta, val;
2214 struct hdr_idx_elem *cur_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2215
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2216 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
2217 old_idx = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2218
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2219 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
2220 cur_hdr = &txn->hdr_idx.v[cur_idx];
2221 cur_ptr = cur_next;
2222 cur_end = cur_ptr + cur_hdr->len;
2223 cur_next = cur_end + cur_hdr->cr + 1;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2224
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2225 val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
2226 if (val) {
2227 /* 3 possibilities :
2228 * - we have already set Connection: close,
2229 * so we remove this line.
2230 * - we have not yet set Connection: close,
2231 * but this line indicates close. We leave
2232 * it untouched and set the flag.
2233 * - we have not yet set Connection: close,
2234 * and this line indicates non-close. We
2235 * replace it.
2236 */
2237 if (s->flags & SN_CONN_CLOSED) {
2238 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
2239 txn->req.eoh += delta;
2240 cur_next += delta;
2241 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
2242 txn->hdr_idx.used--;
2243 cur_hdr->len = 0;
2244 } else {
2245 if (strncasecmp(cur_ptr + val, "close", 5) != 0) {
2246 delta = buffer_replace2(req, cur_ptr + val, cur_end,
2247 "close", 5);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2248 cur_next += delta;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2249 cur_hdr->len += delta;
2250 txn->req.eoh += delta;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2251 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2252 s->flags |= SN_CONN_CLOSED;
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2253 txn->flags &= ~TX_SRV_CONN_KA; /* keep-alive closed on server side */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2254 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2255 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2256 old_idx = cur_idx;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2257 }
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2258
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2259 /* if there is no "Connection: keep-alive" header left and we're
2260 * in HTTP/1.0, then non-persistent connection is implied */
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2261 if (!(s->flags & SN_CONN_CLOSED) && (msg->sl.rq.v_l == 8) &&
2262 (req->data[msg->som + msg->sl.rq.v + 5] == '1') &&
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2263 (req->data[msg->som + msg->sl.rq.v + 7] == '0')) {
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2264 s->flags |= SN_CONN_CLOSED;
Willy Tarreau42736642009-10-18 21:04:35 +0200[diff] [blame]2265 txn->flags &= ~TX_SRV_CONN_KA; /* keep-alive closed on server side */
2266 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2267 }
2268 /* add request headers from the rule sets in the same order */
2269 for (cur_idx = 0; cur_idx < px->nb_reqadd; cur_idx++) {
2270 if (unlikely(http_header_add_tail(req,
2271 &txn->req,
2272 &txn->hdr_idx,
2273 px->req_add[cur_idx])) < 0)
2274 goto return_bad_req;
2275 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]2276
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2277 /* check if stats URI was requested, and if an auth is needed */
2278 if (px->uri_auth != NULL &&
2279 (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)) {
2280 /* we have to check the URI and auth for this request.
2281 * FIXME!!! that one is rather dangerous, we want to
2282 * make it follow standard rules (eg: clear req->analysers).
2283 */
2284 if (stats_check_uri_auth(s, px)) {
2285 req->analysers = 0;
2286 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2287 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2288 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]2289
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2290 /* check whether we have some ACLs set to redirect this request */
2291 list_for_each_entry(rule, &px->redirect_rules, list) {
2292 int ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2293
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2294 ret = acl_pass(ret);
2295 if (rule->cond->pol == ACL_COND_UNLESS)
2296 ret = !ret;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2297
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2298 if (ret) {
2299 struct chunk rdr = { trash, 0 };
2300 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2301
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2302 /* build redirect message */
2303 switch(rule->code) {
2304 case 303:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2305 msg_fmt = HTTP_303;
2306 break;
2307 case 301:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2308 msg_fmt = HTTP_301;
2309 break;
2310 case 302:
2311 default:
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2312 msg_fmt = HTTP_302;
2313 break;
2314 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2315
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]2316 if (unlikely(chunk_strcpy(&rdr, msg_fmt)))
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2317 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2318
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2319 switch(rule->type) {
2320 case REDIRECT_TYPE_PREFIX: {
2321 const char *path;
2322 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2323
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2324 path = http_get_path(txn);
2325 /* build message using path */
2326 if (path) {
2327 pathlen = txn->req.sl.rq.u_l + (txn->req.sol+txn->req.sl.rq.u) - path;
2328 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2329 int qs = 0;
2330 while (qs < pathlen) {
2331 if (path[qs] == '?') {
2332 pathlen = qs;
2333 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2334 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2335 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2336 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2337 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2338 } else {
2339 path = "/";
2340 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2341 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2342
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]2343 if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2344 goto return_bad_req;
2345
2346 /* add prefix. Note that if prefix == "/", we don't want to
2347 * add anything, otherwise it makes it hard for the user to
2348 * configure a self-redirection.
2349 */
2350 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2351 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
2352 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2353 }
2354
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2355 /* add path */
2356 memcpy(rdr.str + rdr.len, path, pathlen);
2357 rdr.len += pathlen;
2358 break;
2359 }
2360 case REDIRECT_TYPE_LOCATION:
2361 default:
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]2362 if (rdr.len + rule->rdr_len > rdr.size - 4)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2363 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2364
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2365 /* add location */
2366 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
2367 rdr.len += rule->rdr_len;
2368 break;
2369 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2370
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2371 if (rule->cookie_len) {
2372 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
2373 rdr.len += 14;
2374 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
2375 rdr.len += rule->cookie_len;
2376 memcpy(rdr.str + rdr.len, "\r\n", 2);
2377 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2378 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2379
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2380 /* add end of headers */
2381 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
2382 rdr.len += 4;
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2383
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2384 txn->status = rule->code;
2385 /* let's log the request time */
2386 s->logs.tv_request = now;
2387 stream_int_retnclose(req->prod, &rdr);
2388 goto return_prx_cond;
2389 }
2390 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2391
Willy Tarreauf1ba4b32009-10-17 14:37:52 +0200[diff] [blame]2392 /* We can shut read side if "connection: close" && !abort_on_close && !content-length */
Willy Tarreau349a0f62009-10-18 21:17:42 +0200[diff] [blame]2393 if ((s->flags & SN_CONN_CLOSED) && !(s->be->options & PR_O_ABRT_CLOSE) &&
2394 !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.hdr_content_len && (txn->meth < HTTP_METH_CONNECT))
2395 req->flags |= BF_DONT_READ;
Willy Tarreauf1ba4b32009-10-17 14:37:52 +0200[diff] [blame]2396
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2397 /* that's OK for us now, let's move on to next analysers */
2398 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2399
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2400 return_bad_req:
2401 /* We centralize bad requests processing here */
2402 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2403 /* we detected a parsing error. We want to archive this request
2404 * in the dedicated proxy area for later troubleshooting.
2405 */
2406 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2407 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2408
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2409 txn->req.msg_state = HTTP_MSG_ERROR;
2410 txn->status = 400;
2411 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2412
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2413 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2414 if (s->listener->counters)
2415 s->listener->counters->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]2416
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2417 return_prx_cond:
2418 if (!(s->flags & SN_ERR_MASK))
2419 s->flags |= SN_ERR_PRXCOND;
2420 if (!(s->flags & SN_FINST_MASK))
2421 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]2422
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2423 req->analysers = 0;
2424 req->analyse_exp = TICK_ETERNITY;
2425 return 0;
2426}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2427
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2428/* This function performs all the processing enabled for the current request.
2429 * It returns 1 if the processing can continue on next analysers, or zero if it
2430 * needs more data, encounters an error, or wants to immediately abort the
2431 * request. It relies on buffers flags, and updates s->req->analysers.
2432 */
2433int http_process_request(struct session *s, struct buffer *req, int an_bit)
2434{
2435 struct http_txn *txn = &s->txn;
2436 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2437
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2438 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
2439 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2440 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2441 return 0;
2442 }
2443
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2444 req->analysers &= ~an_bit;
2445 req->analyse_exp = TICK_ETERNITY;
2446
2447 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2448 now_ms, __FUNCTION__,
2449 s,
2450 req,
2451 req->rex, req->wex,
2452 req->flags,
2453 req->l,
2454 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2455
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2456 /*
2457 * Right now, we know that we have processed the entire headers
2458 * and that unwanted requests have been filtered out. We can do
2459 * whatever we want with the remaining request. Also, now we
2460 * may have separate values for ->fe, ->be.
2461 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2462
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2463 /*
2464 * If HTTP PROXY is set we simply get remote server address
2465 * parsing incoming request.
2466 */
2467 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
2468 url2sa(req->data + msg->sl.rq.u, msg->sl.rq.u_l, &s->srv_addr);
2469 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2470
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2471 /*
2472 * 7: the appsession cookie was looked up very early in 1.2,
2473 * so let's do the same now.
2474 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2475
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2476 /* It needs to look into the URI */
2477 if (s->be->appsession_name) {
2478 get_srv_from_appsession(s, &req->data[msg->som], msg->sl.rq.l);
2479 }
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2480
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2481 /*
2482 * 8: Now we can work with the cookies.
2483 * Note that doing so might move headers in the request, but
2484 * the fields will stay coherent and the URI will not move.
2485 * This should only be performed in the backend.
2486 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]2487 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2488 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
2489 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]2490
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2491 /*
2492 * 9: add X-Forwarded-For if either the frontend or the backend
2493 * asks for it.
2494 */
2495 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
2496 if (s->cli_addr.ss_family == AF_INET) {
2497 /* Add an X-Forwarded-For header unless the source IP is
2498 * in the 'except' network range.
2499 */
2500 if ((!s->fe->except_mask.s_addr ||
2501 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr)
2502 != s->fe->except_net.s_addr) &&
2503 (!s->be->except_mask.s_addr ||
2504 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr)
2505 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]2506 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2507 unsigned char *pn;
2508 pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]2509
2510 /* Note: we rely on the backend to get the header name to be used for
2511 * x-forwarded-for, because the header is really meant for the backends.
2512 * However, if the backend did not specify any option, we have to rely
2513 * on the frontend's header name.
2514 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2515 if (s->be->fwdfor_hdr_len) {
2516 len = s->be->fwdfor_hdr_len;
2517 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]2518 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2519 len = s->fe->fwdfor_hdr_len;
2520 memcpy(trash, s->fe->fwdfor_hdr_name, len);
2521 }
2522 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]2523
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]2524 if (unlikely(http_header_add_tail2(req, &txn->req,
2525 &txn->hdr_idx, trash, len)) < 0)
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2526 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]2527 }
2528 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2529 else if (s->cli_addr.ss_family == AF_INET6) {
2530 /* FIXME: for the sake of completeness, we should also support
2531 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2532 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2533 int len;
2534 char pn[INET6_ADDRSTRLEN];
2535 inet_ntop(AF_INET6,
2536 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
2537 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2538
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2539 /* Note: we rely on the backend to get the header name to be used for
2540 * x-forwarded-for, because the header is really meant for the backends.
2541 * However, if the backend did not specify any option, we have to rely
2542 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2543 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2544 if (s->be->fwdfor_hdr_len) {
2545 len = s->be->fwdfor_hdr_len;
2546 memcpy(trash, s->be->fwdfor_hdr_name, len);
2547 } else {
2548 len = s->fe->fwdfor_hdr_len;
2549 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2550 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2551 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2552
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2553 if (unlikely(http_header_add_tail2(req, &txn->req,
2554 &txn->hdr_idx, trash, len)) < 0)
2555 goto return_bad_req;
2556 }
2557 }
2558
2559 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]2560 * 10: add X-Original-To if either the frontend or the backend
2561 * asks for it.
2562 */
2563 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
2564
2565 /* FIXME: don't know if IPv6 can handle that case too. */
2566 if (s->cli_addr.ss_family == AF_INET) {
2567 /* Add an X-Original-To header unless the destination IP is
2568 * in the 'except' network range.
2569 */
2570 if (!(s->flags & SN_FRT_ADDR_SET))
2571 get_frt_addr(s);
2572
2573 if ((!s->fe->except_mask_to.s_addr ||
2574 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
2575 != s->fe->except_to.s_addr) &&
2576 (!s->be->except_mask_to.s_addr ||
2577 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
2578 != s->be->except_to.s_addr)) {
2579 int len;
2580 unsigned char *pn;
2581 pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr;
2582
2583 /* Note: we rely on the backend to get the header name to be used for
2584 * x-original-to, because the header is really meant for the backends.
2585 * However, if the backend did not specify any option, we have to rely
2586 * on the frontend's header name.
2587 */
2588 if (s->be->orgto_hdr_len) {
2589 len = s->be->orgto_hdr_len;
2590 memcpy(trash, s->be->orgto_hdr_name, len);
2591 } else {
2592 len = s->fe->orgto_hdr_len;
2593 memcpy(trash, s->fe->orgto_hdr_name, len);
2594 }
2595 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
2596
2597 if (unlikely(http_header_add_tail2(req, &txn->req,
2598 &txn->hdr_idx, trash, len)) < 0)
2599 goto return_bad_req;
2600 }
2601 }
2602 }
2603
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2604 /* 11: add "Connection: close" if needed and not yet set. */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2605 if (!(s->flags & SN_CONN_CLOSED) &&
2606 ((s->fe->options | s->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) {
Willy Tarreau78599912009-10-17 20:12:21 +0200[diff] [blame]2607 if (unlikely(http_header_add_tail2(req, &txn->req, &txn->hdr_idx,
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2608 "Connection: close", 17)) < 0)
2609 goto return_bad_req;
2610 s->flags |= SN_CONN_CLOSED;
2611 }
2612 /* Before we switch to data, was assignment set in manage_client_side_cookie?
2613 * If not assigned, perhaps we are balancing on url_param, but this is a
2614 * POST; and the parameters are in the body, maybe scan there to find our server.
2615 * (unless headers overflowed the buffer?)
2616 */
2617 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
2618 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
2619 s->be->url_param_post_limit != 0 && !(req->flags & BF_FULL) &&
2620 memchr(msg->sol + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) {
2621 /* are there enough bytes here? total == l || r || rlim ?
2622 * len is unsigned, but eoh is int,
2623 * how many bytes of body have we received?
2624 * eoh is the first empty line of the header
2625 */
2626 /* already established CRLF or LF at eoh, move to start of message, find message length in buffer */
2627 unsigned long len = req->l - (msg->sol[msg->eoh] == '\r' ? msg->eoh + 2 : msg->eoh + 1);
2628
2629 /* If we have HTTP/1.1 and Expect: 100-continue, then abort.
2630 * We can't assume responsibility for the server's decision,
2631 * on this URI and header set. See rfc2616: 14.20, 8.2.3,
2632 * We also can't change our mind later, about which server to choose, so round robin.
2633 */
2634 if ((likely(msg->sl.rq.v_l == 8) && req->data[msg->som + msg->sl.rq.v + 7] == '1')) {
2635 struct hdr_ctx ctx;
2636 ctx.idx = 0;
2637 /* Expect is allowed in 1.1, look for it */
2638 http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx);
2639 if (ctx.idx != 0 &&
2640 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0))
2641 /* We can't reliablly stall and wait for data, because of
2642 * .NET clients that don't conform to rfc2616; so, no need for
2643 * the next block to check length expectations.
2644 * We could send 100 status back to the client, but then we need to
2645 * re-write headers, and send the message. And this isn't the right
2646 * place for that action.
2647 * TODO: support Expect elsewhere and delete this block.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2648 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2649 goto end_check_maybe_wait_for_body;
2650 }
2651
Willy Tarreau03a56332009-10-18 21:28:29 +0200[diff] [blame]2652 if (likely(len <= s->be->url_param_post_limit)) {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2653 /* limit implies we are supposed to need this many bytes
Willy Tarreau03a56332009-10-18 21:28:29 +0200[diff] [blame]2654 * to find the parameter. Let's see how many bytes we can
2655 * wait for.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2656 */
Willy Tarreau03a56332009-10-18 21:28:29 +0200[diff] [blame]2657 if (txn->flags & TX_REQ_TE_CHNK) {
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2658 buffer_dont_connect(req);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2659 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau03a56332009-10-18 21:28:29 +0200[diff] [blame]2660 } else {
2661 long long hint = txn->req.hdr_content_len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2662 /* but limited to what we care about, maybe we don't expect any entity data (hint == 0) */
2663 if (s->be->url_param_post_limit < hint)
2664 hint = s->be->url_param_post_limit;
Willy Tarreau03a56332009-10-18 21:28:29 +0200[diff] [blame]2665
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2666 /* now do we really need to buffer more data? */
2667 if (len < hint) {
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2668 buffer_dont_connect(req);
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2669 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau41f40ed2008-08-21 10:05:00 +0200[diff] [blame]2670 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2671 /* else... There are no body bytes to wait for */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2672 }
2673 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2674 }
2675 end_check_maybe_wait_for_body:
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2676
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2677 /*************************************************************
2678 * OK, that's finished for the headers. We have done what we *
2679 * could. Let's switch to the DATA state. *
2680 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2681
Willy Tarreaua07a34e2009-08-16 23:27:46 +0200[diff] [blame]2682 buffer_set_rlim(req, req->size); /* no more rewrite needed */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2683 s->logs.tv_request = now;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2684
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2685 /* OK let's go on with the BODY now */
2686 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2687
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2688 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2689 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2690 /* we detected a parsing error. We want to archive this request
2691 * in the dedicated proxy area for later troubleshooting.
2692 */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2693 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2694 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2695
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2696 txn->req.msg_state = HTTP_MSG_ERROR;
2697 txn->status = 400;
2698 req->analysers = 0;
2699 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2700
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2701 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2702 if (s->listener->counters)
2703 s->listener->counters->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2704
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2705 if (!(s->flags & SN_ERR_MASK))
2706 s->flags |= SN_ERR_PRXCOND;
2707 if (!(s->flags & SN_FINST_MASK))
2708 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2709 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2710}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2711
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2712/* This function is an analyser which processes the HTTP tarpit. It always
2713 * returns zero, at the beginning because it prevents any other processing
2714 * from occurring, and at the end because it terminates the request.
2715 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2716int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2717{
2718 struct http_txn *txn = &s->txn;
2719
2720 /* This connection is being tarpitted. The CLIENT side has
2721 * already set the connect expiration date to the right
2722 * timeout. We just have to check that the client is still
2723 * there and that the timeout has not expired.
2724 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2725 buffer_dont_connect(req);
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2726 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
2727 !tick_is_expired(req->analyse_exp, now_ms))
2728 return 0;
2729
2730 /* We will set the queue timer to the time spent, just for
2731 * logging purposes. We fake a 500 server error, so that the
2732 * attacker will not suspect his connection has been tarpitted.
2733 * It will not cause trouble to the logs because we can exclude
2734 * the tarpitted connections by filtering on the 'PT' status flags.
2735 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2736 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
2737
2738 txn->status = 500;
2739 if (req->flags != BF_READ_ERROR)
2740 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
2741
2742 req->analysers = 0;
2743 req->analyse_exp = TICK_ETERNITY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2744
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]2745 s->fe->counters.failed_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]2746 if (s->listener->counters)
2747 s->listener->counters->failed_req++;
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2748
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2749 if (!(s->flags & SN_ERR_MASK))
2750 s->flags |= SN_ERR_PRXCOND;
2751 if (!(s->flags & SN_FINST_MASK))
2752 s->flags |= SN_FINST_T;
2753 return 0;
2754}
2755
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2756/* This function is an analyser which processes the HTTP request body. It looks
2757 * for parameters to be used for the load balancing algorithm (url_param). It
2758 * must only be called after the standard HTTP request processing has occurred,
2759 * because it expects the request to be parsed. It returns zero if it needs to
2760 * read more data, or 1 once it has completed its analysis.
2761 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2762int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2763{
2764 struct http_msg *msg = &s->txn.req;
2765 unsigned long body = msg->sol[msg->eoh] == '\r' ? msg->eoh + 2 : msg->eoh + 1;
2766 long long limit = s->be->url_param_post_limit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2767
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2768 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
2769 /* we need more data */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2770 buffer_dont_connect(req);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2771 return 0;
2772 }
2773
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2774 /* We have to parse the HTTP request body to find any required data.
2775 * "balance url_param check_post" should have been the only way to get
2776 * into this. We were brought here after HTTP header analysis, so all
2777 * related structures are ready.
2778 */
2779
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2780 /* now if we have a length, we'll take the hint */
Willy Tarreau2225dd42009-10-18 21:36:47 +0200[diff] [blame]2781 if (s->txn.flags & TX_REQ_TE_CHNK) {
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2782 unsigned int chunk = 0;
2783 while (body < req->l && !HTTP_IS_CRLF(msg->sol[body])) {
2784 char c = msg->sol[body];
2785 if (ishex(c)) {
2786 unsigned int hex = toupper(c) - '0';
2787 if (hex > 9)
2788 hex -= 'A' - '9' - 1;
2789 chunk = (chunk << 4) | hex;
2790 } else
2791 break;
2792 body++;
2793 }
2794 if (body + 2 >= req->l) /* we want CRLF too */
2795 goto http_body_end; /* end of buffer? data missing! */
2796
2797 if (memcmp(msg->sol+body, "\r\n", 2) != 0)
2798 goto http_body_end; /* chunked encoding len ends with CRLF, and we don't have it yet */
2799
2800 body += 2; // skip CRLF
2801
2802 /* if we support more then one chunk here, we have to do it again when assigning server
2803 * 1. how much entity data do we have? new var
2804 * 2. should save entity_start, entity_cursor, elen & rlen in req; so we don't repeat scanning here
2805 * 3. test if elen > limit, or set new limit to elen if 0 (end of entity found)
2806 */
2807
2808 if (chunk < limit)
2809 limit = chunk; /* only reading one chunk */
2810 } else {
2811 if (msg->hdr_content_len < limit)
2812 limit = msg->hdr_content_len;
2813 }
2814
2815 http_body_end:
2816 /* we leave once we know we have nothing left to do. This means that we have
2817 * enough bytes, or that we know we'll not get any more (buffer full, read
2818 * buffer closed).
2819 */
2820 if (req->l - body >= limit || /* enough bytes! */
2821 req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR | BF_READ_TIMEOUT) ||
2822 tick_is_expired(req->analyse_exp, now_ms)) {
2823 /* The situation will not evolve, so let's give up on the analysis. */
2824 s->logs.tv_request = now; /* update the request timer to reflect full request */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2825 req->analysers &= ~an_bit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2826 req->analyse_exp = TICK_ETERNITY;
2827 return 1;
2828 }
2829 else {
2830 /* Not enough data. We'll re-use the http-request
2831 * timeout here. Ideally, we should set the timeout
2832 * relative to the accept() date. We just set the
2833 * request timeout once at the beginning of the
2834 * request.
2835 */
Willy Tarreau520d95e2009-09-19 21:04:57 +0200[diff] [blame]2836 buffer_dont_connect(req);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2837 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]2838 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2839 return 0;
2840 }
2841}
2842
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2843/* This stream analyser waits for a complete HTTP response. It returns 1 if the
2844 * processing can continue on next analysers, or zero if it either needs more
2845 * data or wants to immediately abort the response (eg: timeout, error, ...). It
2846 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers
2847 * when it has nothing left to do, and may remove any analyser when it wants to
2848 * abort.
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2849 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2850int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2851{
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2852 struct http_txn *txn = &s->txn;
2853 struct http_msg *msg = &txn->rsp;
2854 int cur_idx;
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]2855 int n;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2856
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]2857 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]2858 now_ms, __FUNCTION__,
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2859 s,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]2860 rep,
2861 rep->rex, rep->wex,
2862 rep->flags,
2863 rep->l,
2864 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]2865
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2866 /*
2867 * Now parse the partial (or complete) lines.
2868 * We will check the response syntax, and also join multi-line
2869 * headers. An index of all the lines will be elaborated while
2870 * parsing.
2871 *
2872 * For the parsing, we use a 28 states FSM.
2873 *
2874 * Here is the information we currently have :
2875 * rep->data + rep->som = beginning of response
2876 * rep->data + rep->eoh = end of processed headers / start of current one
2877 * rep->data + rep->eol = end of current header or line (LF or CRLF)
2878 * rep->lr = first non-visited byte
2879 * rep->r = end of data
2880 */
2881
2882 if (likely(rep->lr < rep->r))
2883 http_msg_analyzer(rep, msg, &txn->hdr_idx);
Willy Tarreau7f875f62008-08-11 17:35:01 +0200[diff] [blame]2884
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2885 /* 1: we might have to print this header in debug mode */
2886 if (unlikely((global.mode & MODE_DEBUG) &&
2887 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
2888 (msg->msg_state == HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
2889 char *eol, *sol;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2890
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2891 sol = rep->data + msg->som;
2892 eol = sol + msg->sl.rq.l;
2893 debug_hdr("srvrep", s, sol, eol);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2894
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2895 sol += hdr_idx_first_pos(&txn->hdr_idx);
2896 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2897
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2898 while (cur_idx) {
2899 eol = sol + txn->hdr_idx.v[cur_idx].len;
2900 debug_hdr("srvhdr", s, sol, eol);
2901 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2902 cur_idx = txn->hdr_idx.v[cur_idx].next;
2903 }
2904 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2905
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2906 /*
2907 * Now we quickly check if we have found a full valid response.
2908 * If not so, we check the FD and buffer states before leaving.
2909 * A full response is indicated by the fact that we have seen
2910 * the double LF/CRLF, so the state is HTTP_MSG_BODY. Invalid
2911 * responses are checked first.
2912 *
2913 * Depending on whether the client is still there or not, we
2914 * may send an error response back or not. Note that normally
2915 * we should only check for HTTP status there, and check I/O
2916 * errors somewhere else.
2917 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2918
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2919 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
2920 /* Invalid response */
2921 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2922 /* we detected a parsing error. We want to archive this response
2923 * in the dedicated proxy area for later troubleshooting.
2924 */
2925 hdr_response_bad:
2926 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
2927 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
2928
2929 s->be->counters.failed_resp++;
2930 if (s->srv)
2931 s->srv->counters.failed_resp++;
2932
2933 rep->analysers = 0;
2934 txn->status = 502;
2935 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
2936
2937 if (!(s->flags & SN_ERR_MASK))
2938 s->flags |= SN_ERR_PRXCOND;
2939 if (!(s->flags & SN_FINST_MASK))
2940 s->flags |= SN_FINST_H;
2941
2942 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2943 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2944
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2945 /* too large response does not fit in buffer. */
2946 else if (rep->flags & BF_FULL) {
2947 goto hdr_response_bad;
2948 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2949
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2950 /* read error */
2951 else if (rep->flags & BF_READ_ERROR) {
2952 if (msg->err_pos >= 0)
2953 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2954
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2955 s->be->counters.failed_resp++;
2956 if (s->srv)
2957 s->srv->counters.failed_resp++;
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]2958
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2959 rep->analysers = 0;
2960 txn->status = 502;
2961 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]2962
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2963 if (!(s->flags & SN_ERR_MASK))
2964 s->flags |= SN_ERR_SRVCL;
2965 if (!(s->flags & SN_FINST_MASK))
2966 s->flags |= SN_FINST_H;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2967 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2968 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2969
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2970 /* read timeout : return a 504 to the client. */
2971 else if (rep->flags & BF_READ_TIMEOUT) {
2972 if (msg->err_pos >= 0)
2973 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2974
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2975 s->be->counters.failed_resp++;
2976 if (s->srv)
2977 s->srv->counters.failed_resp++;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2978
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2979 rep->analysers = 0;
2980 txn->status = 504;
2981 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2982
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2983 if (!(s->flags & SN_ERR_MASK))
2984 s->flags |= SN_ERR_SRVTO;
2985 if (!(s->flags & SN_FINST_MASK))
2986 s->flags |= SN_FINST_H;
2987 return 0;
2988 }
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]2989
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2990 /* close from server */
2991 else if (rep->flags & BF_SHUTR) {
2992 if (msg->err_pos >= 0)
2993 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2994
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2995 s->be->counters.failed_resp++;
2996 if (s->srv)
2997 s->srv->counters.failed_resp++;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2998
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]2999 rep->analysers = 0;
3000 txn->status = 502;
3001 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502));
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3002
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]3003 if (!(s->flags & SN_ERR_MASK))
3004 s->flags |= SN_ERR_SRVCL;
3005 if (!(s->flags & SN_FINST_MASK))
3006 s->flags |= SN_FINST_H;
3007 return 0;
3008 }
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]3009
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]3010 /* write error to client (we don't send any message then) */
3011 else if (rep->flags & BF_WRITE_ERROR) {
3012 if (msg->err_pos >= 0)
3013 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
Krzysztof Piotr Oledzki5fb18822009-10-13 21:14:09 +0200[diff] [blame]3014
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]3015 s->be->counters.failed_resp++;
3016 rep->analysers = 0;
3017
3018 if (!(s->flags & SN_ERR_MASK))
3019 s->flags |= SN_ERR_CLICL;
3020 if (!(s->flags & SN_FINST_MASK))
3021 s->flags |= SN_FINST_H;
3022
3023 /* process_session() will take care of the error */
3024 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3025 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3026
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]3027 buffer_dont_close(rep);
3028 return 0;
3029 }
3030
3031 /* More interesting part now : we know that we have a complete
3032 * response which at least looks like HTTP. We have an indicator
3033 * of each header's length, so we can parse them quickly.
3034 */
3035
3036 if (unlikely(msg->err_pos >= 0))
3037 http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, s->fe);
3038
3039 /* ensure we keep this pointer to the beginning of the message */
3040 msg->sol = rep->data + msg->som;
3041
3042 /*
3043 * 1: get the status code
3044 */
3045 n = rep->data[msg->sl.st.c] - '0';
3046 if (n < 1 || n > 5)
3047 n = 0;
3048 s->srv->counters.p.http.rsp[n]++;
3049 s->be->counters.p.http.rsp[n]++;
3050
3051 txn->status = strl2ui(rep->data + msg->sl.st.c, msg->sl.st.c_l);
3052
3053 /*
3054 * 2: check for cacheability.
3055 */
3056
3057 switch (txn->status) {
3058 case 200:
3059 case 203:
3060 case 206:
3061 case 300:
3062 case 301:
3063 case 410:
3064 /* RFC2616 @13.4:
3065 * "A response received with a status code of
3066 * 200, 203, 206, 300, 301 or 410 MAY be stored
3067 * by a cache (...) unless a cache-control
3068 * directive prohibits caching."
3069 *
3070 * RFC2616 @9.5: POST method :
3071 * "Responses to this method are not cacheable,
3072 * unless the response includes appropriate
3073 * Cache-Control or Expires header fields."
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3074 */
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]3075 if (likely(txn->meth != HTTP_METH_POST) &&
3076 (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
3077 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
3078 break;
3079 default:
3080 break;
3081 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3082
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]3083 /*
3084 * 3: we may need to capture headers
3085 */
3086 s->logs.logwait &= ~LW_RESP;
3087 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap))
3088 capture_headers(rep->data + msg->som, &txn->hdr_idx,
3089 txn->rsp.cap, s->fe->rsp_cap);
3090
3091 /* end of job, return OK */
3092 rep->analysers &= ~an_bit;
3093 rep->analyse_exp = TICK_ETERNITY;
3094 return 1;
3095}
3096
3097/* This function performs all the processing enabled for the current response.
3098 * It normally returns zero, but may return 1 if it absolutely needs to be
3099 * called again after other functions. It relies on buffers flags, and updates
3100 * t->rep->analysers. It might make sense to explode it into several other
3101 * functions. It works like process_request (see indications above).
3102 */
3103int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px)
3104{
3105 struct http_txn *txn = &t->txn;
3106 struct buffer *req = t->req;
3107 struct http_msg *msg = &txn->rsp;
3108 struct proxy *cur_proxy;
3109 int cur_idx;
3110
3111 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
3112 now_ms, __FUNCTION__,
3113 t,
3114 rep,
3115 rep->rex, rep->wex,
3116 rep->flags,
3117 rep->l,
3118 rep->analysers);
3119
3120 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) /* we need more data */
3121 return 0;
3122
3123 rep->analysers &= ~an_bit;
3124 rep->analyse_exp = TICK_ETERNITY;
3125
3126 if (1) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3127 /*
3128 * 3: we will have to evaluate the filters.
3129 * As opposed to version 1.2, now they will be evaluated in the
3130 * filters order and not in the header order. This means that
3131 * each filter has to be validated among all headers.
3132 *
3133 * Filters are tried with ->be first, then with ->fe if it is
3134 * different from ->be.
3135 */
3136
3137 t->flags &= ~SN_CONN_CLOSED; /* prepare for inspection */
3138
3139 cur_proxy = t->be;
3140 while (1) {
3141 struct proxy *rule_set = cur_proxy;
3142
3143 /* try headers filters */
3144 if (rule_set->rsp_exp != NULL) {
3145 if (apply_filters_to_response(t, rep, rule_set->rsp_exp) < 0) {
3146 return_bad_resp:
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]3147 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3148 t->srv->counters.failed_resp++;
3149 cur_proxy->counters.failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3150 return_srv_prx_502:
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]3151 buffer_shutr_now(rep);
3152 buffer_shutw_now(req);
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]3153 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3154 txn->status = 502;
Willy Tarreau81acfab2008-11-30 19:22:53 +0100[diff] [blame]3155 stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3156 if (!(t->flags & SN_ERR_MASK))
3157 t->flags |= SN_ERR_PRXCOND;
3158 if (!(t->flags & SN_FINST_MASK))
3159 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3160 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3161 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3162 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3163
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3164 /* has the response been denied ? */
3165 if (txn->flags & TX_SVDENY) {
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]3166 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3167 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3168
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3169 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3170 if (t->listener->counters)
3171 t->listener->counters->denied_resp++;
3172
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3173 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]3174 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3175
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3176 /* We might have to check for "Connection:" */
3177 if (((t->fe->options | t->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3178 !(t->flags & SN_CONN_CLOSED) &&
3179 txn->status >= 200) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3180 char *cur_ptr, *cur_end, *cur_next;
3181 int cur_idx, old_idx, delta, val;
3182 struct hdr_idx_elem *cur_hdr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3183
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3184 cur_next = rep->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
3185 old_idx = 0;
Willy Tarreau541b5c22008-01-06 23:34:21 +0100[diff] [blame]3186
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3187 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
3188 cur_hdr = &txn->hdr_idx.v[cur_idx];
3189 cur_ptr = cur_next;
3190 cur_end = cur_ptr + cur_hdr->len;
3191 cur_next = cur_end + cur_hdr->cr + 1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3192
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3193 val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
3194 if (val) {
3195 /* 3 possibilities :
3196 * - we have already set Connection: close,
3197 * so we remove this line.
3198 * - we have not yet set Connection: close,
3199 * but this line indicates close. We leave
3200 * it untouched and set the flag.
3201 * - we have not yet set Connection: close,
3202 * and this line indicates non-close. We
3203 * replace it.
3204 */
3205 if (t->flags & SN_CONN_CLOSED) {
3206 delta = buffer_replace2(rep, cur_ptr, cur_next, NULL, 0);
3207 txn->rsp.eoh += delta;
3208 cur_next += delta;
3209 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
3210 txn->hdr_idx.used--;
3211 cur_hdr->len = 0;
3212 } else {
3213 if (strncasecmp(cur_ptr + val, "close", 5) != 0) {
3214 delta = buffer_replace2(rep, cur_ptr + val, cur_end,
3215 "close", 5);
3216 cur_next += delta;
3217 cur_hdr->len += delta;
3218 txn->rsp.eoh += delta;
3219 }
3220 t->flags |= SN_CONN_CLOSED;
3221 }
3222 }
3223 old_idx = cur_idx;
Willy Tarreau541b5c22008-01-06 23:34:21 +0100[diff] [blame]3224 }
3225 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3226
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3227 /* add response headers from the rule sets in the same order */
3228 for (cur_idx = 0; cur_idx < rule_set->nb_rspadd; cur_idx++) {
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3229 if (txn->status < 200)
3230 break;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3231 if (unlikely(http_header_add_tail(rep, &txn->rsp, &txn->hdr_idx,
3232 rule_set->rsp_add[cur_idx])) < 0)
3233 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]3234 }
3235
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3236 /* check whether we're already working on the frontend */
3237 if (cur_proxy == t->fe)
3238 break;
3239 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3240 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3241
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3242 /*
3243 * 4: check for server cookie.
3244 */
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3245 if ((t->be->cookie_name || t->be->appsession_name || t->fe->capture_name
3246 || (t->be->options & PR_O_CHK_CACHE)) && txn->status >= 200)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3247 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3248
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3249
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3250 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3251 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3252 */
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3253 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0 && txn->status >= 200)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3254 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3255
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3256 /*
3257 * 6: add server cookie in the response if needed
3258 */
3259 if ((t->srv) && !(t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_INS) &&
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3260 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) &&
3261 txn->status >= 200) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3262 int len;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3263
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3264 /* the server is known, it's not the one the client requested, we have to
3265 * insert a set-cookie here, except if we want to insert only on POST
3266 * requests and this one isn't. Note that servers which don't have cookies
3267 * (eg: some backup servers) will return a full cookie removal request.
3268 */
3269 len = sprintf(trash, "Set-Cookie: %s=%s; path=/",
3270 t->be->cookie_name,
3271 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]3272
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3273 if (t->be->cookie_domain)
3274 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3275
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3276 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
3277 trash, len)) < 0)
3278 goto return_bad_resp;
3279 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3280
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3281 /* Here, we will tell an eventual cache on the client side that we don't
3282 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
3283 * Some caches understand the correct form: 'no-cache="set-cookie"', but
3284 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
3285 */
3286 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3287
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3288 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3289
3290 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
3291 "Cache-control: private", 22)) < 0)
3292 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3293 }
3294 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3295
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3296
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3297 /*
3298 * 7: check if result will be cacheable with a cookie.
3299 * We'll block the response if security checks have caught
3300 * nasty things such as a cacheable cookie.
3301 */
3302 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) ==
3303 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) &&
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3304 (t->be->options & PR_O_CHK_CACHE) &&
3305 txn->status >= 200) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3306
3307 /* we're in presence of a cacheable response containing
3308 * a set-cookie header. We'll block it as requested by
3309 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3310 */
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]3311 if (t->srv)
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3312 t->srv->counters.failed_secu++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3313
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3314 cur_proxy->counters.denied_resp++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3315 if (t->listener->counters)
3316 t->listener->counters->denied_resp++;
3317
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3318 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
3319 t->be->id, t->srv?t->srv->id:"<dispatch>");
3320 send_log(t->be, LOG_ALERT,
3321 "Blocking cacheable cookie in response from instance %s, server %s.\n",
3322 t->be->id, t->srv?t->srv->id:"<dispatch>");
3323 goto return_srv_prx_502;
3324 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3325
3326 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3327 * 8: add "Connection: close" if needed and not yet set.
3328 * Note that we do not need to add it in case of HTTP/1.0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3329 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3330 if (!(t->flags & SN_CONN_CLOSED) &&
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3331 ((t->fe->options | t->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
3332 txn->status >= 200) {
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3333 if ((unlikely(msg->sl.st.v_l != 8) ||
3334 unlikely(req->data[msg->som + 7] != '0')) &&
3335 unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
3336 "Connection: close", 17)) < 0)
3337 goto return_bad_resp;
3338 t->flags |= SN_CONN_CLOSED;
3339 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3340
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3341 /*
3342 * 9: we may be facing a 1xx response (100 continue, 101 switching protocols),
3343 * in which case this is not the right response, and we're waiting for the
3344 * next one. Let's allow this response to go to the client and wait for the
3345 * next one.
3346 */
3347 if (txn->status < 200) {
3348 hdr_idx_init(&txn->hdr_idx);
3349 buffer_forward(rep, rep->lr - (rep->data + msg->som));
3350 msg->msg_state = HTTP_MSG_RPBEFORE;
3351 txn->status = 0;
Willy Tarreaub37c27e2009-10-18 22:53:08 +0200[diff] [blame^]3352 rep->analysers |= AN_RES_WAIT_HTTP | an_bit;
3353 return 1;
Willy Tarreau816b9792009-09-15 21:25:21 +0200[diff] [blame]3354 }
3355
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3356 /*************************************************************
3357 * OK, that's finished for the headers. We have done what we *
3358 * could. Let's switch to the DATA state. *
3359 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3360
Willy Tarreaua07a34e2009-08-16 23:27:46 +0200[diff] [blame]3361 buffer_set_rlim(rep, rep->size); /* no more rewrite needed */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3362 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3363
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3364 /* if the user wants to log as soon as possible, without counting
3365 * bytes from the server, then this is the right moment. We have
3366 * to temporarily assign bytes_out to log what we currently have.
3367 */
3368 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
3369 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
3370 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]3371 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3372 t->logs.bytes_out = 0;
3373 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3374
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3375 /* Note: we must not try to cheat by jumping directly to DATA,
3376 * otherwise we would not let the client side wake up.
3377 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3378
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3379 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3380 }
3381 return 0;
3382}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3383
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3384/* Iterate the same filter through all request headers.
3385 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3386 * Since it can manage the switch to another backend, it updates the per-proxy
3387 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3388 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3389int 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]3390{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3391 char term;
3392 char *cur_ptr, *cur_end, *cur_next;
3393 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3394 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3395 struct hdr_idx_elem *cur_hdr;
3396 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]3397
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3398 last_hdr = 0;
3399
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3400 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3401 old_idx = 0;
3402
3403 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3404 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3405 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3406 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3407 (exp->action == ACT_ALLOW ||
3408 exp->action == ACT_DENY ||
3409 exp->action == ACT_TARPIT))
3410 return 0;
3411
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3412 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3413 if (!cur_idx)
3414 break;
3415
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3416 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3417 cur_ptr = cur_next;
3418 cur_end = cur_ptr + cur_hdr->len;
3419 cur_next = cur_end + cur_hdr->cr + 1;
3420
3421 /* Now we have one header between cur_ptr and cur_end,
3422 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3423 */
3424
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3425 /* The annoying part is that pattern matching needs
3426 * that we modify the contents to null-terminate all
3427 * strings before testing them.
3428 */
3429
3430 term = *cur_end;
3431 *cur_end = '\0';
3432
3433 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
3434 switch (exp->action) {
3435 case ACT_SETBE:
3436 /* It is not possible to jump a second time.
3437 * FIXME: should we return an HTTP/500 here so that
3438 * the admin knows there's a problem ?
3439 */
3440 if (t->be != t->fe)
3441 break;
3442
3443 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3444 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3445 last_hdr = 1;
3446 break;
3447
3448 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3449 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3450 last_hdr = 1;
3451 break;
3452
3453 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3454 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3455 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3456
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3457 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3458 if (t->listener->counters)
3459 t->listener->counters->denied_resp++;
3460
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3461 break;
3462
3463 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3464 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3465 last_hdr = 1;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3466
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3467 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3468 if (t->listener->counters)
3469 t->listener->counters->denied_resp++;
3470
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3471 break;
3472
3473 case ACT_REPLACE:
3474 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
3475 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
3476 /* FIXME: if the user adds a newline in the replacement, the
3477 * index will not be recalculated for now, and the new line
3478 * will not be counted as a new header.
3479 */
3480
3481 cur_end += delta;
3482 cur_next += delta;
3483 cur_hdr->len += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3484 txn->req.eoh += delta;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3485 break;
3486
3487 case ACT_REMOVE:
3488 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
3489 cur_next += delta;
3490
3491 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3492 txn->req.eoh += delta;
3493 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
3494 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3495 cur_hdr->len = 0;
3496 cur_end = NULL; /* null-term has been rewritten */
3497 break;
3498
3499 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3500 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3501 if (cur_end)
3502 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3503
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3504 /* keep the link from this header to next one in case of later
3505 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3506 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3507 old_idx = cur_idx;
3508 }
3509 return 0;
3510}
3511
3512
3513/* Apply the filter to the request line.
3514 * Returns 0 if nothing has been done, 1 if the filter has been applied,
3515 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3516 * Since it can manage the switch to another backend, it updates the per-proxy
3517 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3518 */
3519int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
3520{
3521 char term;
3522 char *cur_ptr, *cur_end;
3523 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3524 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3525 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3526
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3527
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3528 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3529 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3530 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3531 (exp->action == ACT_ALLOW ||
3532 exp->action == ACT_DENY ||
3533 exp->action == ACT_TARPIT))
3534 return 0;
3535 else if (exp->action == ACT_REMOVE)
3536 return 0;
3537
3538 done = 0;
3539
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]3540 cur_ptr = req->data + txn->req.som; /* should be equal to txn->sol */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3541 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3542
3543 /* Now we have the request line between cur_ptr and cur_end */
3544
3545 /* The annoying part is that pattern matching needs
3546 * that we modify the contents to null-terminate all
3547 * strings before testing them.
3548 */
3549
3550 term = *cur_end;
3551 *cur_end = '\0';
3552
3553 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
3554 switch (exp->action) {
3555 case ACT_SETBE:
3556 /* It is not possible to jump a second time.
3557 * FIXME: should we return an HTTP/500 here so that
3558 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3559 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3560 if (t->be != t->fe)
3561 break;
3562
3563 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3564 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3565 done = 1;
3566 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3567
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3568 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3569 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3570 done = 1;
3571 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3572
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3573 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3574 txn->flags |= TX_CLDENY;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3575
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3576 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3577 if (t->listener->counters)
3578 t->listener->counters->denied_resp++;
3579
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3580 done = 1;
3581 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3582
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3583 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3584 txn->flags |= TX_CLTARPIT;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3585
Krzysztof Piotr Oledzki052d4fd2009-10-04 14:52:57 +0200[diff] [blame]3586 t->be->counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +0200[diff] [blame]3587 if (t->listener->counters)
3588 t->listener->counters->denied_resp++;
3589
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3590 done = 1;
3591 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3592
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3593 case ACT_REPLACE:
3594 *cur_end = term; /* restore the string terminator */
3595 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
3596 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
3597 /* FIXME: if the user adds a newline in the replacement, the
3598 * index will not be recalculated for now, and the new line
3599 * will not be counted as a new header.
3600 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3601
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3602 txn->req.eoh += delta;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3603 cur_end += delta;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3604
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]3605 txn->req.sol = req->data + txn->req.som; /* should be equal to txn->sol */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3606 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3607 HTTP_MSG_RQMETH,
3608 cur_ptr, cur_end + 1,
3609 NULL, NULL);
3610 if (unlikely(!cur_end))
3611 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3612
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3613 /* we have a full request and we know that we have either a CR
3614 * or an LF at <ptr>.
3615 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3616 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
3617 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]3618 /* there is no point trying this regex on headers */
3619 return 1;
3620 }
3621 }
3622 *cur_end = term; /* restore the string terminator */
3623 return done;
3624}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]3625
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3626
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3627
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3628/*
3629 * Apply all the req filters <exp> to all headers in buffer <req> of session <t>.
3630 * 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]3631 * unparsable request. Since it can manage the switch to another backend, it
3632 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3633 */
3634int apply_filters_to_request(struct session *t, struct buffer *req, struct hdr_exp *exp)
3635{
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3636 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3637 /* iterate through the filters in the outer loop */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3638 while (exp && !(txn->flags & (TX_CLDENY|TX_CLTARPIT))) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3639 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3640
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3641 /*
3642 * The interleaving of transformations and verdicts
3643 * makes it difficult to decide to continue or stop
3644 * the evaluation.
3645 */
3646
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3647 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3648 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
3649 exp->action == ACT_TARPIT || exp->action == ACT_PASS)) {
3650 exp = exp->next;
3651 continue;
3652 }
3653
3654 /* Apply the filter to the request line. */
3655 ret = apply_filter_to_req_line(t, req, exp);
3656 if (unlikely(ret < 0))
3657 return -1;
3658
3659 if (likely(ret == 0)) {
3660 /* The filter did not match the request, it can be
3661 * iterated through all headers.
3662 */
3663 apply_filter_to_req_headers(t, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3664 }
3665 exp = exp->next;
3666 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3667 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3668}
3669
3670
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3671
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3672/*
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]3673 * Try to retrieve the server associated to the appsession.
3674 * If the server is found, it's assigned to the session.
3675 */
3676void manage_client_side_appsession(struct session *t, const char *buf) {
3677 struct http_txn *txn = &t->txn;
3678 appsess *asession = NULL;
3679 char *sessid_temp = NULL;
3680
3681 if (t->be->options2 & PR_O2_AS_REQL) {
3682 /* request-learn option is enabled : store the sessid in the session for future use */
3683 if (t->sessid != NULL) {
3684 /* free previously allocated memory as we don't need the session id found in the URL anymore */
3685 pool_free2(apools.sessid, t->sessid);
3686 }
3687
3688 if ((t->sessid = pool_alloc2(apools.sessid)) == NULL) {
3689 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
3690 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
3691 return;
3692 }
3693
3694 memcpy(t->sessid, buf, t->be->appsession_len);
3695 t->sessid[t->be->appsession_len] = 0;
3696 }
3697
3698 if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
3699 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
3700 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
3701 return;
3702 }
3703
3704 memcpy(sessid_temp, buf, t->be->appsession_len);
3705 sessid_temp[t->be->appsession_len] = 0;
3706
3707 asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
3708 /* free previously allocated memory */
3709 pool_free2(apools.sessid, sessid_temp);
3710
3711 if (asession != NULL) {
3712 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
3713 if (!(t->be->options2 & PR_O2_AS_REQL))
3714 asession->request_count++;
3715
3716 if (asession->serverid != NULL) {
3717 struct server *srv = t->be->srv;
3718 while (srv) {
3719 if (strcmp(srv->id, asession->serverid) == 0) {
3720 if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
3721 /* we found the server and it's usable */
3722 txn->flags &= ~TX_CK_MASK;
3723 txn->flags |= TX_CK_VALID;
3724 t->flags |= SN_DIRECT | SN_ASSIGNED;
3725 t->srv = srv;
3726 break;
3727 } else {
3728 txn->flags &= ~TX_CK_MASK;
3729 txn->flags |= TX_CK_DOWN;
3730 }
3731 }
3732 srv = srv->next;
3733 }
3734 }
3735 }
3736}
3737
3738/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]3739 * Manage client-side cookie. It can impact performance by about 2% so it is
3740 * desirable to call it only when needed.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3741 */
3742void manage_client_side_cookies(struct session *t, struct buffer *req)
3743{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3744 struct http_txn *txn = &t->txn;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3745 char *p1, *p2, *p3, *p4;
3746 char *del_colon, *del_cookie, *colon;
3747 int app_cookies;
3748
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3749 char *cur_ptr, *cur_end, *cur_next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3750 int cur_idx, old_idx;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3751
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3752 /* Iterate through the headers.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3753 * we start with the start line.
3754 */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]3755 old_idx = 0;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3756 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3757
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3758 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3759 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]3760 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3761
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3762 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3763 cur_ptr = cur_next;
3764 cur_end = cur_ptr + cur_hdr->len;
3765 cur_next = cur_end + cur_hdr->cr + 1;
3766
3767 /* We have one full header between cur_ptr and cur_end, and the
3768 * next header starts at cur_next. We're only interested in
3769 * "Cookie:" headers.
3770 */
3771
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]3772 val = http_header_match2(cur_ptr, cur_end, "Cookie", 6);
3773 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3774 old_idx = cur_idx;
3775 continue;
3776 }
3777
3778 /* Now look for cookies. Conforming to RFC2109, we have to support
3779 * attributes whose name begin with a '$', and associate them with
3780 * the right cookie, if we want to delete this cookie.
3781 * So there are 3 cases for each cookie read :
3782 * 1) it's a special attribute, beginning with a '$' : ignore it.
3783 * 2) it's a server id cookie that we *MAY* want to delete : save
3784 * some pointers on it (last semi-colon, beginning of cookie...)
3785 * 3) it's an application cookie : we *MAY* have to delete a previous
3786 * "special" cookie.
3787 * At the end of loop, if a "special" cookie remains, we may have to
3788 * remove it. If no application cookie persists in the header, we
3789 * *MUST* delete it
3790 */
3791
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]3792 colon = p1 = cur_ptr + val; /* first non-space char after 'Cookie:' */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3793
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3794 /* del_cookie == NULL => nothing to be deleted */
3795 del_colon = del_cookie = NULL;
3796 app_cookies = 0;
3797
3798 while (p1 < cur_end) {
3799 /* skip spaces and colons, but keep an eye on these ones */
3800 while (p1 < cur_end) {
3801 if (*p1 == ';' || *p1 == ',')
3802 colon = p1;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]3803 else if (!isspace((unsigned char)*p1))
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3804 break;
3805 p1++;
3806 }
3807
3808 if (p1 == cur_end)
3809 break;
3810
3811 /* p1 is at the beginning of the cookie name */
3812 p2 = p1;
3813 while (p2 < cur_end && *p2 != '=')
3814 p2++;
3815
3816 if (p2 == cur_end)
3817 break;
3818
3819 p3 = p2 + 1; /* skips the '=' sign */
3820 if (p3 == cur_end)
3821 break;
3822
3823 p4 = p3;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]3824 while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';' && *p4 != ',')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3825 p4++;
3826
3827 /* here, we have the cookie name between p1 and p2,
3828 * and its value between p3 and p4.
3829 * we can process it :
3830 *
3831 * Cookie: NAME=VALUE;
3832 * | || || |
3833 * | || || +--> p4
3834 * | || |+-------> p3
3835 * | || +--------> p2
3836 * | |+------------> p1
3837 * | +-------------> colon
3838 * +--------------------> cur_ptr
3839 */
3840
3841 if (*p1 == '$') {
3842 /* skip this one */
3843 }
3844 else {
3845 /* first, let's see if we want to capture it */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3846 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]3847 txn->cli_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3848 (p4 - p1 >= t->fe->capture_namelen) &&
3849 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3850 int log_len = p4 - p1;
3851
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]3852 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3853 Alert("HTTP logging : out of memory.\n");
3854 } else {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3855 if (log_len > t->fe->capture_len)
3856 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]3857 memcpy(txn->cli_cookie, p1, log_len);
3858 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3859 }
3860 }
3861
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3862 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
3863 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3864 /* Cool... it's the right one */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3865 struct server *srv = t->be->srv;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3866 char *delim;
3867
3868 /* if we're in cookie prefix mode, we'll search the delimitor so that we
3869 * have the server ID betweek p3 and delim, and the original cookie between
3870 * delim+1 and p4. Otherwise, delim==p4 :
3871 *
3872 * Cookie: NAME=SRV~VALUE;
3873 * | || || | |
3874 * | || || | +--> p4
3875 * | || || +--------> delim
3876 * | || |+-----------> p3
3877 * | || +------------> p2
3878 * | |+----------------> p1
3879 * | +-----------------> colon
3880 * +------------------------> cur_ptr
3881 */
3882
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3883 if (t->be->options & PR_O_COOK_PFX) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3884 for (delim = p3; delim < p4; delim++)
3885 if (*delim == COOKIE_DELIM)
3886 break;
3887 }
3888 else
3889 delim = p4;
3890
3891
3892 /* Here, we'll look for the first running server which supports the cookie.
3893 * This allows to share a same cookie between several servers, for example
3894 * to dedicate backup servers to specific servers only.
3895 * However, to prevent clients from sticking to cookie-less backup server
3896 * when they have incidentely learned an empty cookie, we simply ignore
3897 * empty cookies and mark them as invalid.
3898 */
3899 if (delim == p3)
3900 srv = NULL;
3901
3902 while (srv) {
Willy Tarreau92f2ab12007-02-02 22:14:47 +0100[diff] [blame]3903 if (srv->cookie && (srv->cklen == delim - p3) &&
3904 !memcmp(p3, srv->cookie, delim - p3)) {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3905 if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3906 /* we found the server and it's usable */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3907 txn->flags &= ~TX_CK_MASK;
3908 txn->flags |= TX_CK_VALID;
3909 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3910 t->srv = srv;
3911 break;
3912 } else {
3913 /* we found a server, but it's down */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3914 txn->flags &= ~TX_CK_MASK;
3915 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3916 }
3917 }
3918 srv = srv->next;
3919 }
3920
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3921 if (!srv && !(txn->flags & TX_CK_DOWN)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3922 /* no server matched this cookie */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3923 txn->flags &= ~TX_CK_MASK;
3924 txn->flags |= TX_CK_INVALID;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3925 }
3926
3927 /* depending on the cookie mode, we may have to either :
3928 * - delete the complete cookie if we're in insert+indirect mode, so that
3929 * the server never sees it ;
3930 * - remove the server id from the cookie value, and tag the cookie as an
3931 * application cookie so that it does not get accidentely removed later,
3932 * if we're in cookie prefix mode
3933 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3934 if ((t->be->options & PR_O_COOK_PFX) && (delim != p4)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3935 int delta; /* negative */
3936
3937 delta = buffer_replace2(req, p3, delim + 1, NULL, 0);
3938 p4 += delta;
3939 cur_end += delta;
3940 cur_next += delta;
3941 cur_hdr->len += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3942 txn->req.eoh += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3943
3944 del_cookie = del_colon = NULL;
3945 app_cookies++; /* protect the header from deletion */
3946 }
3947 else if (del_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3948 (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]3949 del_cookie = p1;
3950 del_colon = colon;
3951 }
3952 } else {
3953 /* now we know that we must keep this cookie since it's
3954 * not ours. But if we wanted to delete our cookie
3955 * earlier, we cannot remove the complete header, but we
3956 * can remove the previous block itself.
3957 */
3958 app_cookies++;
3959
3960 if (del_cookie != NULL) {
3961 int delta; /* negative */
3962
3963 delta = buffer_replace2(req, del_cookie, p1, NULL, 0);
3964 p4 += delta;
3965 cur_end += delta;
3966 cur_next += delta;
3967 cur_hdr->len += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3968 txn->req.eoh += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3969 del_cookie = del_colon = NULL;
3970 }
3971 }
3972
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3973 if ((t->be->appsession_name != NULL) &&
3974 (memcmp(p1, t->be->appsession_name, p2 - p1) == 0)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3975 /* first, let's see if the cookie is our appcookie*/
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]3976
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3977 /* Cool... it's the right one */
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]3978 manage_client_side_appsession(t, p3);
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]3979#if defined(DEBUG_HASH)
3980 Alert("manage_client_side_cookies\n");
3981 appsession_hash_dump(&(t->be->htbl_proxy));
3982#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3983 }/* end if ((t->proxy->appsession_name != NULL) ... */
3984 }
3985
3986 /* we'll have to look for another cookie ... */
3987 p1 = p4;
3988 } /* while (p1 < cur_end) */
3989
3990 /* There's no more cookie on this line.
3991 * We may have marked the last one(s) for deletion.
3992 * We must do this now in two ways :
3993 * - if there is no app cookie, we simply delete the header ;
3994 * - if there are app cookies, we must delete the end of the
3995 * string properly, including the colon/semi-colon before
3996 * the cookie name.
3997 */
3998 if (del_cookie != NULL) {
3999 int delta;
4000 if (app_cookies) {
4001 delta = buffer_replace2(req, del_colon, cur_end, NULL, 0);
4002 cur_end = del_colon;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4003 cur_hdr->len += delta;
4004 } else {
4005 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4006
4007 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4008 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
4009 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4010 cur_hdr->len = 0;
4011 }
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]4012 cur_next += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4013 txn->req.eoh += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4014 }
4015
4016 /* keep the link from this header to next one */
4017 old_idx = cur_idx;
4018 } /* end of cookie processing on this header */
4019}
4020
4021
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4022/* Iterate the same filter through all response headers contained in <rtr>.
4023 * Returns 1 if this filter can be stopped upon return, otherwise 0.
4024 */
4025int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
4026{
4027 char term;
4028 char *cur_ptr, *cur_end, *cur_next;
4029 int cur_idx, old_idx, last_hdr;
4030 struct http_txn *txn = &t->txn;
4031 struct hdr_idx_elem *cur_hdr;
4032 int len, delta;
4033
4034 last_hdr = 0;
4035
4036 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
4037 old_idx = 0;
4038
4039 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4040 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4041 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4042 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4043 (exp->action == ACT_ALLOW ||
4044 exp->action == ACT_DENY))
4045 return 0;
4046
4047 cur_idx = txn->hdr_idx.v[old_idx].next;
4048 if (!cur_idx)
4049 break;
4050
4051 cur_hdr = &txn->hdr_idx.v[cur_idx];
4052 cur_ptr = cur_next;
4053 cur_end = cur_ptr + cur_hdr->len;
4054 cur_next = cur_end + cur_hdr->cr + 1;
4055
4056 /* Now we have one header between cur_ptr and cur_end,
4057 * and the next header starts at cur_next.
4058 */
4059
4060 /* The annoying part is that pattern matching needs
4061 * that we modify the contents to null-terminate all
4062 * strings before testing them.
4063 */
4064
4065 term = *cur_end;
4066 *cur_end = '\0';
4067
4068 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
4069 switch (exp->action) {
4070 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4071 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4072 last_hdr = 1;
4073 break;
4074
4075 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4076 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4077 last_hdr = 1;
4078 break;
4079
4080 case ACT_REPLACE:
4081 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
4082 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
4083 /* FIXME: if the user adds a newline in the replacement, the
4084 * index will not be recalculated for now, and the new line
4085 * will not be counted as a new header.
4086 */
4087
4088 cur_end += delta;
4089 cur_next += delta;
4090 cur_hdr->len += delta;
4091 txn->rsp.eoh += delta;
4092 break;
4093
4094 case ACT_REMOVE:
4095 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
4096 cur_next += delta;
4097
4098 /* FIXME: this should be a separate function */
4099 txn->rsp.eoh += delta;
4100 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
4101 txn->hdr_idx.used--;
4102 cur_hdr->len = 0;
4103 cur_end = NULL; /* null-term has been rewritten */
4104 break;
4105
4106 }
4107 }
4108 if (cur_end)
4109 *cur_end = term; /* restore the string terminator */
4110
4111 /* keep the link from this header to next one in case of later
4112 * removal of next header.
4113 */
4114 old_idx = cur_idx;
4115 }
4116 return 0;
4117}
4118
4119
4120/* Apply the filter to the status line in the response buffer <rtr>.
4121 * Returns 0 if nothing has been done, 1 if the filter has been applied,
4122 * or -1 if a replacement resulted in an invalid status line.
4123 */
4124int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
4125{
4126 char term;
4127 char *cur_ptr, *cur_end;
4128 int done;
4129 struct http_txn *txn = &t->txn;
4130 int len, delta;
4131
4132
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4133 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4134 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4135 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4136 (exp->action == ACT_ALLOW ||
4137 exp->action == ACT_DENY))
4138 return 0;
4139 else if (exp->action == ACT_REMOVE)
4140 return 0;
4141
4142 done = 0;
4143
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]4144 cur_ptr = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4145 cur_end = cur_ptr + txn->rsp.sl.rq.l;
4146
4147 /* Now we have the status line between cur_ptr and cur_end */
4148
4149 /* The annoying part is that pattern matching needs
4150 * that we modify the contents to null-terminate all
4151 * strings before testing them.
4152 */
4153
4154 term = *cur_end;
4155 *cur_end = '\0';
4156
4157 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
4158 switch (exp->action) {
4159 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4160 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4161 done = 1;
4162 break;
4163
4164 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4165 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4166 done = 1;
4167 break;
4168
4169 case ACT_REPLACE:
4170 *cur_end = term; /* restore the string terminator */
4171 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
4172 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
4173 /* FIXME: if the user adds a newline in the replacement, the
4174 * index will not be recalculated for now, and the new line
4175 * will not be counted as a new header.
4176 */
4177
4178 txn->rsp.eoh += delta;
4179 cur_end += delta;
4180
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]4181 txn->rsp.sol = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4182 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]4183 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4184 cur_ptr, cur_end + 1,
4185 NULL, NULL);
4186 if (unlikely(!cur_end))
4187 return -1;
4188
4189 /* we have a full respnse and we know that we have either a CR
4190 * or an LF at <ptr>.
4191 */
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4192 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]4193 hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.rq.l, *cur_end == '\r');
4194 /* there is no point trying this regex on headers */
4195 return 1;
4196 }
4197 }
4198 *cur_end = term; /* restore the string terminator */
4199 return done;
4200}
4201
4202
4203
4204/*
4205 * Apply all the resp filters <exp> to all headers in buffer <rtr> of session <t>.
4206 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
4207 * unparsable response.
4208 */
4209int apply_filters_to_response(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
4210{
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4211 struct http_txn *txn = &t->txn;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4212 /* iterate through the filters in the outer loop */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4213 while (exp && !(txn->flags & TX_SVDENY)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4214 int ret;
4215
4216 /*
4217 * The interleaving of transformations and verdicts
4218 * makes it difficult to decide to continue or stop
4219 * the evaluation.
4220 */
4221
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4222 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4223 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
4224 exp->action == ACT_PASS)) {
4225 exp = exp->next;
4226 continue;
4227 }
4228
4229 /* Apply the filter to the status line. */
4230 ret = apply_filter_to_sts_line(t, rtr, exp);
4231 if (unlikely(ret < 0))
4232 return -1;
4233
4234 if (likely(ret == 0)) {
4235 /* The filter did not match the response, it can be
4236 * iterated through all headers.
4237 */
4238 apply_filter_to_resp_headers(t, rtr, exp);
4239 }
4240 exp = exp->next;
4241 }
4242 return 0;
4243}
4244
4245
4246
4247/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]4248 * Manage server-side cookies. It can impact performance by about 2% so it is
4249 * desirable to call it only when needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4250 */
4251void manage_server_side_cookies(struct session *t, struct buffer *rtr)
4252{
4253 struct http_txn *txn = &t->txn;
4254 char *p1, *p2, *p3, *p4;
4255
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4256 char *cur_ptr, *cur_end, *cur_next;
4257 int cur_idx, old_idx, delta;
4258
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4259 /* Iterate through the headers.
4260 * we start with the start line.
4261 */
4262 old_idx = 0;
4263 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
4264
4265 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
4266 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4267 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4268
4269 cur_hdr = &txn->hdr_idx.v[cur_idx];
4270 cur_ptr = cur_next;
4271 cur_end = cur_ptr + cur_hdr->len;
4272 cur_next = cur_end + cur_hdr->cr + 1;
4273
4274 /* We have one full header between cur_ptr and cur_end, and the
4275 * next header starts at cur_next. We're only interested in
4276 * "Cookie:" headers.
4277 */
4278
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4279 val = http_header_match2(cur_ptr, cur_end, "Set-Cookie", 10);
4280 if (!val) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4281 old_idx = cur_idx;
4282 continue;
4283 }
4284
4285 /* OK, right now we know we have a set-cookie at cur_ptr */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4286 txn->flags |= TX_SCK_ANY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4287
4288
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4289 /* maybe we only wanted to see if there was a set-cookie. Note that
4290 * the cookie capture is declared in the fronend.
4291 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4292 if (t->be->cookie_name == NULL &&
4293 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4294 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4295 return;
4296
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4297 p1 = cur_ptr + val; /* first non-space char after 'Set-Cookie:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4298
4299 while (p1 < cur_end) { /* in fact, we'll break after the first cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4300 if (p1 == cur_end || *p1 == ';') /* end of cookie */
4301 break;
4302
4303 /* p1 is at the beginning of the cookie name */
4304 p2 = p1;
4305
4306 while (p2 < cur_end && *p2 != '=' && *p2 != ';')
4307 p2++;
4308
4309 if (p2 == cur_end || *p2 == ';') /* next cookie */
4310 break;
4311
4312 p3 = p2 + 1; /* skip the '=' sign */
4313 if (p3 == cur_end)
4314 break;
4315
4316 p4 = p3;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]4317 while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';')
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4318 p4++;
4319
4320 /* here, we have the cookie name between p1 and p2,
4321 * and its value between p3 and p4.
4322 * we can process it.
4323 */
4324
4325 /* first, let's see if we want to capture it */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4326 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4327 txn->srv_cookie == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4328 (p4 - p1 >= t->fe->capture_namelen) &&
4329 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4330 int log_len = p4 - p1;
4331
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]4332 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4333 Alert("HTTP logging : out of memory.\n");
4334 }
4335
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4336 if (log_len > t->fe->capture_len)
4337 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4338 memcpy(txn->srv_cookie, p1, log_len);
4339 txn->srv_cookie[log_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4340 }
4341
4342 /* now check if we need to process it for persistence */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4343 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
4344 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4345 /* Cool... it's the right one */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4346 txn->flags |= TX_SCK_SEEN;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4347
4348 /* If the cookie is in insert mode on a known server, we'll delete
4349 * this occurrence because we'll insert another one later.
4350 * We'll delete it too if the "indirect" option is set and we're in
4351 * a direct access. */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4352 if (((t->srv) && (t->be->options & PR_O_COOK_INS)) ||
4353 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4354 /* this header must be deleted */
4355 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
4356 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
4357 txn->hdr_idx.used--;
4358 cur_hdr->len = 0;
4359 cur_next += delta;
4360 txn->rsp.eoh += delta;
4361
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4362 txn->flags |= TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4363 }
4364 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4365 (t->be->options & PR_O_COOK_RW)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4366 /* replace bytes p3->p4 with the cookie name associated
4367 * with this server since we know it.
4368 */
4369 delta = buffer_replace2(rtr, p3, p4, t->srv->cookie, t->srv->cklen);
4370 cur_hdr->len += delta;
4371 cur_next += delta;
4372 txn->rsp.eoh += delta;
4373
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4374 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4375 }
4376 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4377 (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4378 /* insert the cookie name associated with this server
4379 * before existing cookie, and insert a delimitor between them..
4380 */
4381 delta = buffer_replace2(rtr, p3, p3, t->srv->cookie, t->srv->cklen + 1);
4382 cur_hdr->len += delta;
4383 cur_next += delta;
4384 txn->rsp.eoh += delta;
4385
4386 p3[t->srv->cklen] = COOKIE_DELIM;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4387 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4388 }
4389 }
4390 /* next, let's see if the cookie is our appcookie */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4391 else if ((t->be->appsession_name != NULL) &&
4392 (memcmp(p1, t->be->appsession_name, p2 - p1) == 0)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4393
4394 /* Cool... it's the right one */
4395
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4396 if (t->sessid != NULL) {
4397 /* free previously allocated memory as we don't need it anymore */
4398 pool_free2(apools.sessid, t->sessid);
4399 }
4400 /* Store the sessid in the session for future use */
4401 if ((t->sessid = pool_alloc2(apools.sessid)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4402 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
4403 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
4404 return;
4405 }
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4406 memcpy(t->sessid, p3, t->be->appsession_len);
4407 t->sessid[t->be->appsession_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4408 }/* end if ((t->proxy->appsession_name != NULL) ... */
4409 break; /* we don't want to loop again since there cannot be another cookie on the same line */
4410 } /* we're now at the end of the cookie value */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4411 /* keep the link from this header to next one */
4412 old_idx = cur_idx;
4413 } /* end of cookie processing on this header */
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4414
4415 if (t->sessid != NULL) {
4416 appsess *asession = NULL;
4417 /* only do insert, if lookup fails */
4418 asession = appsession_hash_lookup(&(t->be->htbl_proxy), t->sessid);
4419 if (asession == NULL) {
4420 if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
4421 Alert("Not enough Memory process_srv():asession:calloc().\n");
4422 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
4423 return;
4424 }
4425 if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
4426 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
4427 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
4428 return;
4429 }
4430 memcpy(asession->sessid, t->sessid, t->be->appsession_len);
4431 asession->sessid[t->be->appsession_len] = 0;
4432
4433 size_t server_id_len = strlen(t->srv->id) + 1;
4434 if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
4435 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
4436 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
4437 return;
4438 }
4439 asession->serverid[0] = '\0';
4440 memcpy(asession->serverid, t->srv->id, server_id_len);
4441
4442 asession->request_count = 0;
4443 appsession_hash_insert(&(t->be->htbl_proxy), asession);
4444 }
4445
4446 asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
4447 asession->request_count++;
4448 }
4449
4450#if defined(DEBUG_HASH)
4451 Alert("manage_server_side_cookies\n");
4452 appsession_hash_dump(&(t->be->htbl_proxy));
4453#endif
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4454}
4455
4456
4457
4458/*
4459 * Check if response is cacheable or not. Updates t->flags.
4460 */
4461void check_response_for_cacheability(struct session *t, struct buffer *rtr)
4462{
4463 struct http_txn *txn = &t->txn;
4464 char *p1, *p2;
4465
4466 char *cur_ptr, *cur_end, *cur_next;
4467 int cur_idx;
4468
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]4469 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4470 return;
4471
4472 /* Iterate through the headers.
4473 * we start with the start line.
4474 */
4475 cur_idx = 0;
4476 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
4477
4478 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
4479 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4480 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4481
4482 cur_hdr = &txn->hdr_idx.v[cur_idx];
4483 cur_ptr = cur_next;
4484 cur_end = cur_ptr + cur_hdr->len;
4485 cur_next = cur_end + cur_hdr->cr + 1;
4486
4487 /* We have one full header between cur_ptr and cur_end, and the
4488 * next header starts at cur_next. We're only interested in
4489 * "Cookie:" headers.
4490 */
4491
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4492 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
4493 if (val) {
4494 if ((cur_end - (cur_ptr + val) >= 8) &&
4495 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
4496 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4497 return;
4498 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4499 }
4500
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4501 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
4502 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4503 continue;
4504
4505 /* OK, right now we know we have a cache-control header at cur_ptr */
4506
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4507 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4508
4509 if (p1 >= cur_end) /* no more info */
4510 continue;
4511
4512 /* p1 is at the beginning of the value */
4513 p2 = p1;
4514
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]4515 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4516 p2++;
4517
4518 /* we have a complete value between p1 and p2 */
4519 if (p2 < cur_end && *p2 == '=') {
4520 /* we have something of the form no-cache="set-cookie" */
4521 if ((cur_end - p1 >= 21) &&
4522 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
4523 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4524 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4525 continue;
4526 }
4527
4528 /* OK, so we know that either p2 points to the end of string or to a comma */
4529 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
4530 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
4531 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
4532 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4533 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4534 return;
4535 }
4536
4537 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4538 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4539 continue;
4540 }
4541 }
4542}
4543
4544
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4545/*
4546 * Try to retrieve a known appsession in the URI, then the associated server.
4547 * If the server is found, it's assigned to the session.
4548 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4549void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4550{
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4551 char *request_line;
4552
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4553 if (t->be->appsession_name == NULL ||
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]4554 (t->txn.meth != HTTP_METH_GET && t->txn.meth != HTTP_METH_POST) ||
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4555 (request_line = memchr(begin, ';', len)) == NULL ||
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4556 ((1 + t->be->appsession_name_len + 1 + t->be->appsession_len) > (begin + len - request_line)))
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4557 return;
4558
4559 /* skip ';' */
4560 request_line++;
4561
4562 /* look if we have a jsessionid */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4563 if (strncasecmp(request_line, t->be->appsession_name, t->be->appsession_name_len) != 0)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4564 return;
4565
4566 /* skip jsessionid= */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4567 request_line += t->be->appsession_name_len + 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4568
Cyril Bontébf47aeb2009-10-15 00:15:40 +0200[diff] [blame]4569 manage_client_side_appsession(t, request_line);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4570#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]4571 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4572 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4573#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4574}
4575
4576
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4577/*
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]4578 * In a GET or HEAD request, check if the requested URI matches the stats uri
4579 * for the current backend, and if an authorization has been passed and is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4580 *
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]4581 * 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]4582 * 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]4583 * the stats I/O handler will be registered to start sending data.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4584 *
4585 * Returns 1 if the session's state changes, otherwise 0.
4586 */
4587int stats_check_uri_auth(struct session *t, struct proxy *backend)
4588{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4589 struct http_txn *txn = &t->txn;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4590 struct uri_auth *uri_auth = backend->uri_auth;
4591 struct user_auth *user;
4592 int authenticated, cur_idx;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4593 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4594
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4595 memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats));
4596
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4597 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4598 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4599 return 0;
4600
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4601 h = t->req->data + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4602
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]4603 /* the URI is in h */
4604 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4605 return 0;
4606
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]4607 h += uri_auth->uri_len;
4608 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 3) {
4609 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4610 t->data_ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]4611 break;
4612 }
4613 h++;
4614 }
4615
4616 if (uri_auth->refresh) {
4617 h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
4618 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 10) {
4619 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4620 t->data_ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]4621 break;
4622 }
4623 h++;
4624 }
4625 }
4626
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]4627 h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
4628 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 4) {
4629 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4630 t->data_ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]4631 break;
4632 }
4633 h++;
4634 }
4635
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4636 t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
4637
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4638 /* we are in front of a interceptable URI. Let's check
4639 * if there's an authentication and if it's valid.
4640 */
4641 user = uri_auth->users;
4642 if (!user) {
4643 /* no user auth required, it's OK */
4644 authenticated = 1;
4645 } else {
4646 authenticated = 0;
4647
4648 /* a user list is defined, we have to check.
4649 * skip 21 chars for "Authorization: Basic ".
4650 */
4651
4652 /* FIXME: this should move to an earlier place */
4653 cur_idx = 0;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4654 h = t->req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
4655 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
4656 int len = txn->hdr_idx.v[cur_idx].len;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4657 if (len > 14 &&
4658 !strncasecmp("Authorization:", h, 14)) {
Krzysztof Piotr Oledzki6f61b212009-10-04 23:34:15 +0200[diff] [blame]4659 chunk_initlen(&txn->auth_hdr, h, 0, len);
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4660 break;
4661 }
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4662 h += len + txn->hdr_idx.v[cur_idx].cr + 1;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4663 }
4664
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4665 if (txn->auth_hdr.len < 21 ||
4666 memcmp(txn->auth_hdr.str + 14, " Basic ", 7))
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4667 user = NULL;
4668
4669 while (user) {
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4670 if ((txn->auth_hdr.len == user->user_len + 14 + 7)
4671 && !memcmp(txn->auth_hdr.str + 14 + 7,
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4672 user->user_pwd, user->user_len)) {
4673 authenticated = 1;
4674 break;
4675 }
4676 user = user->next;
4677 }
4678 }
4679
4680 if (!authenticated) {
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]4681 struct chunk msg;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4682
4683 /* no need to go further */
Krzysztof Piotr Oledzki78abe612009-09-27 13:23:20 +0200[diff] [blame]4684 sprintf(trash, HTTP_401_fmt, uri_auth->auth_realm);
4685 chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4686 txn->status = 401;
Willy Tarreaudded32d2008-11-30 19:48:07 +0100[diff] [blame]4687 stream_int_retnclose(t->req->prod, &msg);
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]4688 t->req->analysers = 0;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4689 if (!(t->flags & SN_ERR_MASK))
4690 t->flags |= SN_ERR_PRXCOND;
4691 if (!(t->flags & SN_FINST_MASK))
4692 t->flags |= SN_FINST_R;
4693 return 1;
4694 }
4695
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4696 /* The request is valid, the user is authenticated. Let's start sending
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4697 * data.
4698 */
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]4699 t->logs.tv_request = now;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4700 t->data_source = DATA_SRC_STATS;
4701 t->data_state = DATA_ST_INIT;
Willy Tarreau91e99932008-06-30 07:51:00 +0200[diff] [blame]4702 t->task->nice = -32; /* small boost for HTTP statistics */
Willy Tarreaub0c9bc42009-10-04 15:56:38 +0200[diff] [blame]4703 stream_int_register_handler(t->rep->prod, http_stats_io_handler);
4704 t->rep->prod->private = t;
4705 t->rep->prod->st0 = t->rep->prod->st1 = 0;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4706 return 1;
4707}
4708
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4709/*
4710 * Capture a bad request or response and archive it in the proxy's structure.
4711 */
4712void http_capture_bad_message(struct error_snapshot *es, struct session *s,
4713 struct buffer *buf, struct http_msg *msg,
4714 struct proxy *other_end)
4715{
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]4716 es->len = buf->r - (buf->data + msg->som);
4717 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4718 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]4719 es->pos = msg->err_pos - msg->som;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4720 else
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]4721 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4722 es->when = date; // user-visible date
4723 es->sid = s->uniq_id;
4724 es->srv = s->srv;
4725 es->oe = other_end;
4726 es->src = s->cli_addr;
4727}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4728
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4729/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4730 * Print a debug line with a header
4731 */
4732void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
4733{
4734 int len, max;
4735 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4736 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4737 max = end - start;
4738 UBOUND(max, sizeof(trash) - len - 1);
4739 len += strlcpy2(trash + len, start, max + 1);
4740 trash[len++] = '\n';
4741 write(1, trash, len);
4742}
4743
4744
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4745/************************************************************************/
4746/* The code below is dedicated to ACL parsing and matching */
4747/************************************************************************/
4748
4749
4750
4751
4752/* 1. Check on METHOD
4753 * We use the pre-parsed method if it is known, and store its number as an
4754 * integer. If it is unknown, we use the pointer and the length.
4755 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4756static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4757{
4758 int len, meth;
4759
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4760 len = strlen(*text);
4761 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4762
4763 pattern->val.i = meth;
4764 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4765 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4766 if (!pattern->ptr.str)
4767 return 0;
4768 pattern->len = len;
4769 }
4770 return 1;
4771}
4772
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4773static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4774acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
4775 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4776{
4777 int meth;
4778 struct http_txn *txn = l7;
4779
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4780 if (!txn)
4781 return 0;
4782
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4783 if (txn->req.msg_state != HTTP_MSG_BODY)
4784 return 0;
4785
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4786 meth = txn->meth;
4787 test->i = meth;
4788 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4789 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4790 /* ensure the indexes are not affected */
4791 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4792 test->len = txn->req.sl.rq.m_l;
4793 test->ptr = txn->req.sol;
4794 }
4795 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
4796 return 1;
4797}
4798
4799static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
4800{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]4801 int icase;
4802
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4803 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4804 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4805
4806 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4807 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4808
4809 /* Other method, we must compare the strings */
4810 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4811 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]4812
4813 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
4814 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
4815 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4816 return ACL_PAT_FAIL;
4817 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4818}
4819
4820/* 2. Check on Request/Status Version
4821 * We simply compare strings here.
4822 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4823static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4824{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4825 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4826 if (!pattern->ptr.str)
4827 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4828 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4829 return 1;
4830}
4831
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4832static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4833acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
4834 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4835{
4836 struct http_txn *txn = l7;
4837 char *ptr;
4838 int len;
4839
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4840 if (!txn)
4841 return 0;
4842
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4843 if (txn->req.msg_state != HTTP_MSG_BODY)
4844 return 0;
4845
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4846 len = txn->req.sl.rq.v_l;
4847 ptr = txn->req.sol + txn->req.sl.rq.v - txn->req.som;
4848
4849 while ((len-- > 0) && (*ptr++ != '/'));
4850 if (len <= 0)
4851 return 0;
4852
4853 test->ptr = ptr;
4854 test->len = len;
4855
4856 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
4857 return 1;
4858}
4859
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4860static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4861acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
4862 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4863{
4864 struct http_txn *txn = l7;
4865 char *ptr;
4866 int len;
4867
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4868 if (!txn)
4869 return 0;
4870
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4871 if (txn->rsp.msg_state != HTTP_MSG_BODY)
4872 return 0;
4873
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4874 len = txn->rsp.sl.st.v_l;
4875 ptr = txn->rsp.sol;
4876
4877 while ((len-- > 0) && (*ptr++ != '/'));
4878 if (len <= 0)
4879 return 0;
4880
4881 test->ptr = ptr;
4882 test->len = len;
4883
4884 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
4885 return 1;
4886}
4887
4888/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4889static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4890acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
4891 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4892{
4893 struct http_txn *txn = l7;
4894 char *ptr;
4895 int len;
4896
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4897 if (!txn)
4898 return 0;
4899
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4900 if (txn->rsp.msg_state != HTTP_MSG_BODY)
4901 return 0;
4902
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4903 len = txn->rsp.sl.st.c_l;
4904 ptr = txn->rsp.sol + txn->rsp.sl.st.c - txn->rsp.som;
4905
4906 test->i = __strl2ui(ptr, len);
4907 test->flags = ACL_TEST_F_VOL_1ST;
4908 return 1;
4909}
4910
4911/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4912static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4913acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
4914 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4915{
4916 struct http_txn *txn = l7;
4917
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4918 if (!txn)
4919 return 0;
4920
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4921 if (txn->req.msg_state != HTTP_MSG_BODY)
4922 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4923
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4924 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4925 /* ensure the indexes are not affected */
4926 return 0;
4927
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4928 test->len = txn->req.sl.rq.u_l;
4929 test->ptr = txn->req.sol + txn->req.sl.rq.u;
4930
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]4931 /* we do not need to set READ_ONLY because the data is in a buffer */
4932 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4933 return 1;
4934}
4935
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4936static int
4937acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
4938 struct acl_expr *expr, struct acl_test *test)
4939{
4940 struct http_txn *txn = l7;
4941
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4942 if (!txn)
4943 return 0;
4944
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4945 if (txn->req.msg_state != HTTP_MSG_BODY)
4946 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4947
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4948 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4949 /* ensure the indexes are not affected */
4950 return 0;
4951
4952 /* Parse HTTP request */
4953 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
4954 test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr;
4955 test->i = AF_INET;
4956
4957 /*
4958 * If we are parsing url in frontend space, we prepare backend stage
4959 * to not parse again the same url ! optimization lazyness...
4960 */
4961 if (px->options & PR_O_HTTP_PROXY)
4962 l4->flags |= SN_ADDR_SET;
4963
4964 test->flags = ACL_TEST_F_READ_ONLY;
4965 return 1;
4966}
4967
4968static int
4969acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
4970 struct acl_expr *expr, struct acl_test *test)
4971{
4972 struct http_txn *txn = l7;
4973
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4974 if (!txn)
4975 return 0;
4976
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4977 if (txn->req.msg_state != HTTP_MSG_BODY)
4978 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4979
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4980 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4981 /* ensure the indexes are not affected */
4982 return 0;
4983
4984 /* Same optimization as url_ip */
4985 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
4986 test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port);
4987
4988 if (px->options & PR_O_HTTP_PROXY)
4989 l4->flags |= SN_ADDR_SET;
4990
4991 test->flags = ACL_TEST_F_READ_ONLY;
4992 return 1;
4993}
4994
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4995/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
4996 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
4997 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4998static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4999acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5000 struct acl_expr *expr, struct acl_test *test)
5001{
5002 struct http_txn *txn = l7;
5003 struct hdr_idx *idx = &txn->hdr_idx;
5004 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5005
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5006 if (!txn)
5007 return 0;
5008
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5009 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
5010 /* search for header from the beginning */
5011 ctx->idx = 0;
5012
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5013 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
5014 test->flags |= ACL_TEST_F_FETCH_MORE;
5015 test->flags |= ACL_TEST_F_VOL_HDR;
5016 test->len = ctx->vlen;
5017 test->ptr = (char *)ctx->line + ctx->val;
5018 return 1;
5019 }
5020
5021 test->flags &= ~ACL_TEST_F_FETCH_MORE;
5022 test->flags |= ACL_TEST_F_VOL_HDR;
5023 return 0;
5024}
5025
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5026static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5027acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
5028 struct acl_expr *expr, struct acl_test *test)
5029{
5030 struct http_txn *txn = l7;
5031
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5032 if (!txn)
5033 return 0;
5034
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5035 if (txn->req.msg_state != HTTP_MSG_BODY)
5036 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5037
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5038 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5039 /* ensure the indexes are not affected */
5040 return 0;
5041
5042 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
5043}
5044
5045static int
5046acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
5047 struct acl_expr *expr, struct acl_test *test)
5048{
5049 struct http_txn *txn = l7;
5050
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5051 if (!txn)
5052 return 0;
5053
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5054 if (txn->rsp.msg_state != HTTP_MSG_BODY)
5055 return 0;
5056
5057 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
5058}
5059
5060/* 6. Check on HTTP header count. The number of occurrences is returned.
5061 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
5062 */
5063static int
5064acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5065 struct acl_expr *expr, struct acl_test *test)
5066{
5067 struct http_txn *txn = l7;
5068 struct hdr_idx *idx = &txn->hdr_idx;
5069 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5070 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5071
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5072 if (!txn)
5073 return 0;
5074
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5075 ctx.idx = 0;
5076 cnt = 0;
5077 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
5078 cnt++;
5079
5080 test->i = cnt;
5081 test->flags = ACL_TEST_F_VOL_HDR;
5082 return 1;
5083}
5084
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5085static int
5086acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
5087 struct acl_expr *expr, struct acl_test *test)
5088{
5089 struct http_txn *txn = l7;
5090
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5091 if (!txn)
5092 return 0;
5093
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5094 if (txn->req.msg_state != HTTP_MSG_BODY)
5095 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5096
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5097 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5098 /* ensure the indexes are not affected */
5099 return 0;
5100
5101 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
5102}
5103
5104static int
5105acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
5106 struct acl_expr *expr, struct acl_test *test)
5107{
5108 struct http_txn *txn = l7;
5109
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5110 if (!txn)
5111 return 0;
5112
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5113 if (txn->rsp.msg_state != HTTP_MSG_BODY)
5114 return 0;
5115
5116 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
5117}
5118
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5119/* 7. Check on HTTP header's integer value. The integer value is returned.
5120 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5121 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5122 */
5123static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5124acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5125 struct acl_expr *expr, struct acl_test *test)
5126{
5127 struct http_txn *txn = l7;
5128 struct hdr_idx *idx = &txn->hdr_idx;
5129 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5130
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5131 if (!txn)
5132 return 0;
5133
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5134 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
5135 /* search for header from the beginning */
5136 ctx->idx = 0;
5137
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5138 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
5139 test->flags |= ACL_TEST_F_FETCH_MORE;
5140 test->flags |= ACL_TEST_F_VOL_HDR;
5141 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
5142 return 1;
5143 }
5144
5145 test->flags &= ~ACL_TEST_F_FETCH_MORE;
5146 test->flags |= ACL_TEST_F_VOL_HDR;
5147 return 0;
5148}
5149
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5150static int
5151acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
5152 struct acl_expr *expr, struct acl_test *test)
5153{
5154 struct http_txn *txn = l7;
5155
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5156 if (!txn)
5157 return 0;
5158
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5159 if (txn->req.msg_state != HTTP_MSG_BODY)
5160 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5161
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5162 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5163 /* ensure the indexes are not affected */
5164 return 0;
5165
5166 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
5167}
5168
5169static int
5170acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
5171 struct acl_expr *expr, struct acl_test *test)
5172{
5173 struct http_txn *txn = l7;
5174
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5175 if (!txn)
5176 return 0;
5177
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5178 if (txn->rsp.msg_state != HTTP_MSG_BODY)
5179 return 0;
5180
5181 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
5182}
5183
Willy Tarreau106f9792009-09-19 07:54:16 +0200[diff] [blame]5184/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
5185 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
5186 */
5187static int
5188acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
5189 struct acl_expr *expr, struct acl_test *test)
5190{
5191 struct http_txn *txn = l7;
5192 struct hdr_idx *idx = &txn->hdr_idx;
5193 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
5194
5195 if (!txn)
5196 return 0;
5197
5198 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
5199 /* search for header from the beginning */
5200 ctx->idx = 0;
5201
5202 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
5203 test->flags |= ACL_TEST_F_FETCH_MORE;
5204 test->flags |= ACL_TEST_F_VOL_HDR;
5205 /* Same optimization as url_ip */
5206 memset(&l4->srv_addr.sin_addr, 0, sizeof(l4->srv_addr.sin_addr));
5207 url2ip((char *)ctx->line + ctx->val, &l4->srv_addr.sin_addr);
5208 test->ptr = (void *)&l4->srv_addr.sin_addr;
5209 test->i = AF_INET;
5210 return 1;
5211 }
5212
5213 test->flags &= ~ACL_TEST_F_FETCH_MORE;
5214 test->flags |= ACL_TEST_F_VOL_HDR;
5215 return 0;
5216}
5217
5218static int
5219acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
5220 struct acl_expr *expr, struct acl_test *test)
5221{
5222 struct http_txn *txn = l7;
5223
5224 if (!txn)
5225 return 0;
5226
5227 if (txn->req.msg_state != HTTP_MSG_BODY)
5228 return 0;
5229
5230 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5231 /* ensure the indexes are not affected */
5232 return 0;
5233
5234 return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
5235}
5236
5237static int
5238acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
5239 struct acl_expr *expr, struct acl_test *test)
5240{
5241 struct http_txn *txn = l7;
5242
5243 if (!txn)
5244 return 0;
5245
5246 if (txn->rsp.msg_state != HTTP_MSG_BODY)
5247 return 0;
5248
5249 return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
5250}
5251
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]5252/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
5253 * the first '/' after the possible hostname, and ends before the possible '?'.
5254 */
5255static int
5256acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
5257 struct acl_expr *expr, struct acl_test *test)
5258{
5259 struct http_txn *txn = l7;
5260 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5261
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5262 if (!txn)
5263 return 0;
5264
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5265 if (txn->req.msg_state != HTTP_MSG_BODY)
5266 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5267
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5268 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5269 /* ensure the indexes are not affected */
5270 return 0;
5271
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5272 end = txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l;
5273 ptr = http_get_path(txn);
5274 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]5275 return 0;
5276
5277 /* OK, we got the '/' ! */
5278 test->ptr = ptr;
5279
5280 while (ptr < end && *ptr != '?')
5281 ptr++;
5282
5283 test->len = ptr - test->ptr;
5284
5285 /* we do not need to set READ_ONLY because the data is in a buffer */
5286 test->flags = ACL_TEST_F_VOL_1ST;
5287 return 1;
5288}
5289
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]5290static int
5291acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
5292 struct acl_expr *expr, struct acl_test *test)
5293{
5294 struct buffer *req = s->req;
5295 struct http_txn *txn = &s->txn;
5296 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]5297
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]5298 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
5299 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
5300 */
5301
5302 if (!s || !req)
5303 return 0;
5304
5305 if (unlikely(msg->msg_state == HTTP_MSG_BODY)) {
5306 /* Already decoded as OK */
5307 test->flags |= ACL_TEST_F_SET_RES_PASS;
5308 return 1;
5309 }
5310
5311 /* Try to decode HTTP request */
5312 if (likely(req->lr < req->r))
5313 http_msg_analyzer(req, msg, &txn->hdr_idx);
5314
5315 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
5316 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
5317 test->flags |= ACL_TEST_F_SET_RES_FAIL;
5318 return 1;
5319 }
5320 /* wait for final state */
5321 test->flags |= ACL_TEST_F_MAY_CHANGE;
5322 return 0;
5323 }
5324
5325 /* OK we got a valid HTTP request. We have some minor preparation to
5326 * perform so that further checks can rely on HTTP tests.
5327 */
5328 msg->sol = req->data + msg->som;
5329 txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
5330 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
5331 s->flags |= SN_REDIRECTABLE;
5332
5333 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
5334 test->flags |= ACL_TEST_F_SET_RES_FAIL;
5335 return 1;
5336 }
5337
5338 test->flags |= ACL_TEST_F_SET_RES_PASS;
5339 return 1;
5340}
5341
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5342
5343/************************************************************************/
5344/* All supported keywords must be declared here. */
5345/************************************************************************/
5346
5347/* Note: must not be declared <const> as its list will be overwritten */
5348static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]5349 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
5350
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5351 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
5352 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5353 { "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE },
5354 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5355
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5356 { "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5357 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
5358 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
5359 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
5360 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
5361 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
5362 { "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
5363 { "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE },
5364 { "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]5365
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5366 /* note: we should set hdr* to use ACL_USE_HDR_VOLATILE, and chdr* to use L7REQ_VOLATILE */
5367 { "hdr", acl_parse_str, acl_fetch_chdr, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5368 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
5369 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
5370 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
5371 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
5372 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
5373 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
5374 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
5375 { "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]5376 { "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]5377
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5378 { "shdr", acl_parse_str, acl_fetch_shdr, acl_match_str, ACL_USE_L7RTR_VOLATILE },
5379 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
5380 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
5381 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
5382 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
5383 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
5384 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
5385 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
5386 { "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]5387 { "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]5388
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5389 { "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5390 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
5391 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
5392 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
5393 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
5394 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
5395 { "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]5396
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]5397 { NULL, NULL, NULL, NULL },
5398
5399#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5400 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
5401 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
5402 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
5403 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
5404 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
5405 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
5406 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
5407
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5408 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
5409 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
5410 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
5411 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
5412 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
5413 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
5414 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
5415 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
5416
5417 { "auth_user", acl_parse_str, acl_fetch_user, acl_match_str },
5418 { "auth_regex", acl_parse_reg, acl_fetch_user, acl_match_reg },
5419 { "auth_clear", acl_parse_str, acl_fetch_auth, acl_match_str },
5420 { "auth_md5", acl_parse_str, acl_fetch_auth, acl_match_md5 },
5421 { NULL, NULL, NULL, NULL },
5422#endif
5423}};
5424
5425
5426__attribute__((constructor))
5427static void __http_protocol_init(void)
5428{
5429 acl_register_keywords(&acl_kws);
5430}
5431
5432
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5433/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5434 * Local variables:
5435 * c-indent-level: 8
5436 * c-basic-offset: 8
5437 * End:
5438 */