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git01.mediatek.com / haproxy / b55932ddaf4342a7c43b257da5bd1f7be5806381 / . / src / proto_http.c
blob: 0fb759a323e30224dafb7b8be61a023dc96ee2d5 [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 Tarreau2d3d94c2008-11-30 20:20:08 +0100[diff] [blame]529 buffer_write_ena(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 */
643 if (rdr.len + s->srv->rdr_len > sizeof(trash))
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;
656 if (rdr.len + len > sizeof(trash) - 4) /* 4 for CRLF-CRLF */
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))) {
1398 if (likely(ptr == buf->data)) {
1399 msg->sol = ptr;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1400 msg->som = 0;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1401 } else {
1402#if PARSE_PRESERVE_EMPTY_LINES
1403 /* only skip empty leading lines, don't remove them */
1404 msg->sol = ptr;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1405 msg->som = ptr - buf->data;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1406#else
1407 /* Remove empty leading lines, as recommended by
1408 * RFC2616. This takes a lot of time because we
1409 * must move all the buffer backwards, but this
1410 * is rarely needed. The method above will be
1411 * cleaner when we'll be able to start sending
1412 * the request from any place in the buffer.
1413 */
1414 buf->lr = ptr;
1415 buffer_replace2(buf, buf->data, buf->lr, NULL, 0);
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1416 msg->som = 0;
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1417 msg->sol = buf->data;
1418 ptr = buf->data;
1419 end = buf->r;
1420#endif
1421 }
1422 hdr_idx_init(idx);
1423 state = HTTP_MSG_RPVER;
1424 goto http_msg_rpver;
1425 }
1426
1427 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1428 goto http_msg_invalid;
1429
1430 if (unlikely(*ptr == '\n'))
1431 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1432 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
1433 /* stop here */
1434
1435 http_msg_rpbefore_cr:
1436 case HTTP_MSG_RPBEFORE_CR:
1437 EXPECT_LF_HERE(ptr, http_msg_invalid);
1438 EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
1439 /* stop here */
1440
1441 http_msg_rpver:
1442 case HTTP_MSG_RPVER:
1443 case HTTP_MSG_RPVER_SP:
1444 case HTTP_MSG_RPCODE:
1445 case HTTP_MSG_RPCODE_SP:
1446 case HTTP_MSG_RPREASON:
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]1447 ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1448 &buf->lr, &msg->msg_state);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1449 if (unlikely(!ptr))
1450 return;
1451
1452 /* we have a full response and we know that we have either a CR
1453 * or an LF at <ptr>.
1454 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1455 //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]1456 hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
1457
1458 msg->sol = ptr;
1459 if (likely(*ptr == '\r'))
1460 EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
1461 goto http_msg_rpline_end;
1462
1463 http_msg_rpline_end:
1464 case HTTP_MSG_RPLINE_END:
1465 /* msg->sol must point to the first of CR or LF. */
1466 EXPECT_LF_HERE(ptr, http_msg_invalid);
1467 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
1468 /* stop here */
1469
1470 /*
1471 * Second, states that are specific to the request only
1472 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1473 http_msg_rqbefore:
1474 case HTTP_MSG_RQBEFORE:
1475 if (likely(HTTP_IS_TOKEN(*ptr))) {
1476 if (likely(ptr == buf->data)) {
1477 msg->sol = ptr;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1478 msg->som = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1479 } else {
1480#if PARSE_PRESERVE_EMPTY_LINES
1481 /* only skip empty leading lines, don't remove them */
1482 msg->sol = ptr;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1483 msg->som = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1484#else
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1485 /* Remove empty leading lines, as recommended by
1486 * RFC2616. This takes a lot of time because we
1487 * must move all the buffer backwards, but this
1488 * is rarely needed. The method above will be
1489 * cleaner when we'll be able to start sending
1490 * the request from any place in the buffer.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1491 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1492 buf->lr = ptr;
1493 buffer_replace2(buf, buf->data, buf->lr, NULL, 0);
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1494 msg->som = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1495 msg->sol = buf->data;
1496 ptr = buf->data;
1497 end = buf->r;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1498#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1499 }
Willy Tarreauf0d058e2007-01-25 12:03:42 +0100[diff] [blame]1500 /* we will need this when keep-alive will be supported
1501 hdr_idx_init(idx);
1502 */
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1503 state = HTTP_MSG_RQMETH;
1504 goto http_msg_rqmeth;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1505 }
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1506
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1507 if (unlikely(!HTTP_IS_CRLF(*ptr)))
1508 goto http_msg_invalid;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1509
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1510 if (unlikely(*ptr == '\n'))
1511 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
1512 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1513 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1514
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1515 http_msg_rqbefore_cr:
1516 case HTTP_MSG_RQBEFORE_CR:
1517 EXPECT_LF_HERE(ptr, http_msg_invalid);
1518 EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1519 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1520
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1521 http_msg_rqmeth:
1522 case HTTP_MSG_RQMETH:
1523 case HTTP_MSG_RQMETH_SP:
1524 case HTTP_MSG_RQURI:
1525 case HTTP_MSG_RQURI_SP:
1526 case HTTP_MSG_RQVER:
1527 ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1528 &buf->lr, &msg->msg_state);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1529 if (unlikely(!ptr))
1530 return;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1531
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1532 /* we have a full request and we know that we have either a CR
1533 * or an LF at <ptr>.
1534 */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1535 //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]1536 hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1537
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1538 msg->sol = ptr;
1539 if (likely(*ptr == '\r'))
1540 EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1541 goto http_msg_rqline_end;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1542
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1543 http_msg_rqline_end:
1544 case HTTP_MSG_RQLINE_END:
1545 /* check for HTTP/0.9 request : no version information available.
1546 * msg->sol must point to the first of CR or LF.
1547 */
1548 if (unlikely(msg->sl.rq.v_l == 0))
1549 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1550
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1551 EXPECT_LF_HERE(ptr, http_msg_invalid);
1552 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1553 /* stop here */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1554
Willy Tarreau8973c702007-01-21 23:58:29 +0100[diff] [blame]1555 /*
1556 * Common states below
1557 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1558 http_msg_hdr_first:
1559 case HTTP_MSG_HDR_FIRST:
1560 msg->sol = ptr;
1561 if (likely(!HTTP_IS_CRLF(*ptr))) {
1562 goto http_msg_hdr_name;
1563 }
1564
1565 if (likely(*ptr == '\r'))
1566 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1567 goto http_msg_last_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1568
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1569 http_msg_hdr_name:
1570 case HTTP_MSG_HDR_NAME:
1571 /* assumes msg->sol points to the first char */
1572 if (likely(HTTP_IS_TOKEN(*ptr)))
1573 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1574
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1575 if (likely(*ptr == ':')) {
1576 msg->col = ptr - buf->data;
1577 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
1578 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1579
Willy Tarreau32a4ec02009-04-02 11:35:18 +0200[diff] [blame]1580 if (likely(msg->err_pos < -1) || *ptr == '\n')
1581 goto http_msg_invalid;
1582
1583 if (msg->err_pos == -1) /* capture error pointer */
1584 msg->err_pos = ptr - buf->data; /* >= 0 now */
1585
1586 /* and we still accept this non-token character */
1587 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1588
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1589 http_msg_hdr_l1_sp:
1590 case HTTP_MSG_HDR_L1_SP:
1591 /* assumes msg->sol points to the first char and msg->col to the colon */
1592 if (likely(HTTP_IS_SPHT(*ptr)))
1593 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]1594
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1595 /* header value can be basically anything except CR/LF */
1596 msg->sov = ptr - buf->data;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1597
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1598 if (likely(!HTTP_IS_CRLF(*ptr))) {
1599 goto http_msg_hdr_val;
1600 }
1601
1602 if (likely(*ptr == '\r'))
1603 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
1604 goto http_msg_hdr_l1_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1605
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1606 http_msg_hdr_l1_lf:
1607 case HTTP_MSG_HDR_L1_LF:
1608 EXPECT_LF_HERE(ptr, http_msg_invalid);
1609 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]1610
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1611 http_msg_hdr_l1_lws:
1612 case HTTP_MSG_HDR_L1_LWS:
1613 if (likely(HTTP_IS_SPHT(*ptr))) {
1614 /* replace HT,CR,LF with spaces */
1615 for (; buf->data+msg->sov < ptr; msg->sov++)
1616 buf->data[msg->sov] = ' ';
1617 goto http_msg_hdr_l1_sp;
1618 }
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]1619 /* we had a header consisting only in spaces ! */
1620 msg->eol = buf->data + msg->sov;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1621 goto http_msg_complete_header;
1622
1623 http_msg_hdr_val:
1624 case HTTP_MSG_HDR_VAL:
1625 /* assumes msg->sol points to the first char, msg->col to the
1626 * colon, and msg->sov points to the first character of the
1627 * value.
1628 */
1629 if (likely(!HTTP_IS_CRLF(*ptr)))
1630 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1631
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1632 msg->eol = ptr;
1633 /* Note: we could also copy eol into ->eoh so that we have the
1634 * real header end in case it ends with lots of LWS, but is this
1635 * really needed ?
1636 */
1637 if (likely(*ptr == '\r'))
1638 EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
1639 goto http_msg_hdr_l2_lf;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1640
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1641 http_msg_hdr_l2_lf:
1642 case HTTP_MSG_HDR_L2_LF:
1643 EXPECT_LF_HERE(ptr, http_msg_invalid);
1644 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]1645
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1646 http_msg_hdr_l2_lws:
1647 case HTTP_MSG_HDR_L2_LWS:
1648 if (unlikely(HTTP_IS_SPHT(*ptr))) {
1649 /* LWS: replace HT,CR,LF with spaces */
1650 for (; msg->eol < ptr; msg->eol++)
1651 *msg->eol = ' ';
1652 goto http_msg_hdr_val;
1653 }
1654 http_msg_complete_header:
1655 /*
1656 * It was a new header, so the last one is finished.
1657 * Assumes msg->sol points to the first char, msg->col to the
1658 * colon, msg->sov points to the first character of the value
1659 * and msg->eol to the first CR or LF so we know how the line
1660 * ends. We insert last header into the index.
1661 */
1662 /*
1663 fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
1664 write(2, msg->sol, msg->eol-msg->sol);
1665 fprintf(stderr,"\n");
1666 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1667
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1668 if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
1669 idx, idx->tail) < 0))
1670 goto http_msg_invalid;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1671
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1672 msg->sol = ptr;
1673 if (likely(!HTTP_IS_CRLF(*ptr))) {
1674 goto http_msg_hdr_name;
1675 }
1676
1677 if (likely(*ptr == '\r'))
1678 EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
1679 goto http_msg_last_lf;
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1680
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1681 http_msg_last_lf:
1682 case HTTP_MSG_LAST_LF:
1683 /* Assumes msg->sol points to the first of either CR or LF */
1684 EXPECT_LF_HERE(ptr, http_msg_invalid);
1685 ptr++;
1686 buf->lr = ptr;
1687 msg->eoh = msg->sol - buf->data;
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1688 msg->msg_state = HTTP_MSG_BODY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1689 return;
1690#ifdef DEBUG_FULL
1691 default:
1692 fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
1693 exit(1);
Willy Tarreau230fd0b2006-12-17 12:05:00 +0100[diff] [blame]1694#endif
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1695 }
1696 http_msg_ood:
1697 /* out of data */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1698 msg->msg_state = state;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1699 buf->lr = ptr;
1700 return;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1701
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1702 http_msg_invalid:
1703 /* invalid message */
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]1704 msg->msg_state = HTTP_MSG_ERROR;
Willy Tarreau7552c032009-03-01 11:10:40 +0100[diff] [blame]1705 buf->lr = ptr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1706 return;
1707}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]1708
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1709/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
1710 * conversion succeeded, 0 in case of error. If the request was already 1.X,
1711 * nothing is done and 1 is returned.
1712 */
1713static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
1714{
1715 int delta;
1716 char *cur_end;
1717
1718 if (msg->sl.rq.v_l != 0)
1719 return 1;
1720
1721 msg->sol = req->data + msg->som;
1722 cur_end = msg->sol + msg->sl.rq.l;
1723 delta = 0;
1724
1725 if (msg->sl.rq.u_l == 0) {
1726 /* if no URI was set, add "/" */
1727 delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
1728 cur_end += delta;
1729 msg->eoh += delta;
1730 }
1731 /* add HTTP version */
1732 delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
1733 msg->eoh += delta;
1734 cur_end += delta;
1735 cur_end = (char *)http_parse_reqline(msg, req->data,
1736 HTTP_MSG_RQMETH,
1737 msg->sol, cur_end + 1,
1738 NULL, NULL);
1739 if (unlikely(!cur_end))
1740 return 0;
1741
1742 /* we have a full HTTP/1.0 request now and we know that
1743 * we have either a CR or an LF at <ptr>.
1744 */
1745 hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
1746 return 1;
1747}
1748
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1749/* This stream analyser waits for a complete HTTP request. It returns 1 if the
1750 * processing can continue on next analysers, or zero if it either needs more
1751 * data or wants to immediately abort the request (eg: timeout, error, ...). It
1752 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
1753 * when it has nothing left to do, and may remove any analyser when it wants to
1754 * abort.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1755 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]1756int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1757{
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1758 /*
1759 * We will parse the partial (or complete) lines.
1760 * We will check the request syntax, and also join multi-line
1761 * headers. An index of all the lines will be elaborated while
1762 * parsing.
1763 *
1764 * For the parsing, we use a 28 states FSM.
1765 *
1766 * Here is the information we currently have :
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]1767 * req->data + msg->som = beginning of request
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1768 * req->data + req->eoh = end of processed headers / start of current one
1769 * req->data + req->eol = end of current header or line (LF or CRLF)
1770 * req->lr = first non-visited byte
1771 * req->r = end of data
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1772 *
1773 * At end of parsing, we may perform a capture of the error (if any), and
1774 * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
1775 * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
1776 * finally headers capture.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1777 */
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1778
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1779 int cur_idx;
1780 struct http_txn *txn = &s->txn;
1781 struct http_msg *msg = &txn->req;
Willy Tarreau976f1ee2006-12-17 10:06:03 +0100[diff] [blame]1782
Willy Tarreau6bf17362009-02-24 10:48:35 +0100[diff] [blame]1783 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
1784 now_ms, __FUNCTION__,
1785 s,
1786 req,
1787 req->rex, req->wex,
1788 req->flags,
1789 req->l,
1790 req->analysers);
1791
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1792 if (likely(req->lr < req->r))
1793 http_msg_analyzer(req, msg, &txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1794
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1795 /* 1: we might have to print this header in debug mode */
1796 if (unlikely((global.mode & MODE_DEBUG) &&
1797 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
1798 (msg->msg_state == HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
1799 char *eol, *sol;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1800
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1801 sol = req->data + msg->som;
1802 eol = sol + msg->sl.rq.l;
1803 debug_hdr("clireq", s, sol, eol);
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]1804
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1805 sol += hdr_idx_first_pos(&txn->hdr_idx);
1806 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1807
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1808 while (cur_idx) {
1809 eol = sol + txn->hdr_idx.v[cur_idx].len;
1810 debug_hdr("clihdr", s, sol, eol);
1811 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
1812 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1813 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1814 }
1815
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1816
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1817 /*
1818 * Now we quickly check if we have found a full valid request.
1819 * If not so, we check the FD and buffer states before leaving.
1820 * A full request is indicated by the fact that we have seen
1821 * the double LF/CRLF, so the state is HTTP_MSG_BODY. Invalid
1822 * requests are checked first.
1823 *
1824 */
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_BODY)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1827 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1828 * First, let's catch bad requests.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1829 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1830 if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
1831 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1832
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1833 /* 1: Since we are in header mode, if there's no space
1834 * left for headers, we won't be able to free more
1835 * later, so the session will never terminate. We
1836 * must terminate it now.
1837 */
1838 if (unlikely(req->flags & BF_FULL)) {
1839 /* FIXME: check if URI is set and return Status
1840 * 414 Request URI too long instead.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1841 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1842 goto return_bad_req;
1843 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1844
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1845 /* 2: have we encountered a read error ? */
1846 else if (req->flags & BF_READ_ERROR) {
1847 /* we cannot return any message on error */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]1848 if (msg->err_pos >= 0)
1849 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1850 msg->msg_state = HTTP_MSG_ERROR;
1851 req->analysers = 0;
1852 s->fe->failed_req++;
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;
1869 s->fe->failed_req++;
1870 if (!(s->flags & SN_ERR_MASK))
1871 s->flags |= SN_ERR_CLITO;
1872 if (!(s->flags & SN_FINST_MASK))
1873 s->flags |= SN_FINST_R;
1874 return 0;
1875 }
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]1876
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1877 /* 4: have we encountered a close ? */
1878 else if (req->flags & BF_SHUTR) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]1879 if (msg->err_pos >= 0)
1880 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1881 txn->status = 400;
1882 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
1883 msg->msg_state = HTTP_MSG_ERROR;
1884 req->analysers = 0;
1885 s->fe->failed_req++;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]1886
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1887 if (!(s->flags & SN_ERR_MASK))
1888 s->flags |= SN_ERR_CLICL;
1889 if (!(s->flags & SN_FINST_MASK))
1890 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]1891 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1892 }
1893
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1894 buffer_write_dis(req);
Willy Tarreau1b194fe2009-03-21 21:10:04 +0100[diff] [blame]1895 req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
1896
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1897 /* just set the request timeout once at the beginning of the request */
1898 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]1899 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1900
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1901 /* we're not ready yet */
1902 return 0;
1903 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1904
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1905 /* OK now we have a complete HTTP request with indexed headers. Let's
1906 * complete the request parsing by setting a few fields we will need
1907 * later.
1908 */
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]1909
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1910 /* Maybe we found in invalid header name while we were configured not
1911 * to block on that, so we have to capture it now.
1912 */
1913 if (unlikely(msg->err_pos >= 0))
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]1914 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
1915
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1916 /* ensure we keep this pointer to the beginning of the message */
1917 msg->sol = req->data + msg->som;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1918
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1919 /*
1920 * 1: identify the method
1921 */
1922 txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
1923
1924 /* we can make use of server redirect on GET and HEAD */
1925 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
1926 s->flags |= SN_REDIRECTABLE;
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]1927
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1928 /*
1929 * 2: check if the URI matches the monitor_uri.
1930 * We have to do this for every request which gets in, because
1931 * the monitor-uri is defined by the frontend.
1932 */
1933 if (unlikely((s->fe->monitor_uri_len != 0) &&
1934 (s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
1935 !memcmp(&req->data[msg->sl.rq.u],
1936 s->fe->monitor_uri,
1937 s->fe->monitor_uri_len))) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1938 /*
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1939 * We have found the monitor URI
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1940 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1941 struct acl_cond *cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1942
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1943 s->flags |= SN_MONITOR;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1944
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1945 /* Check if we want to fail this monitor request or not */
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1946 list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
1947 int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1948
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1949 ret = acl_pass(ret);
1950 if (cond->pol == ACL_COND_UNLESS)
1951 ret = !ret;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1952
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1953 if (ret) {
1954 /* we fail this request, let's return 503 service unavail */
1955 txn->status = 503;
1956 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
1957 goto return_prx_cond;
Willy Tarreaub80c2302007-11-30 20:51:32 +0100[diff] [blame]1958 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1959 }
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]1960
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1961 /* nothing to fail, let's reply normaly */
1962 txn->status = 200;
1963 stream_int_retnclose(req->prod, &http_200_chunk);
1964 goto return_prx_cond;
1965 }
1966
1967 /*
1968 * 3: Maybe we have to copy the original REQURI for the logs ?
1969 * Note: we cannot log anymore if the request has been
1970 * classified as invalid.
1971 */
1972 if (unlikely(s->logs.logwait & LW_REQ)) {
1973 /* we have a complete HTTP request that we must log */
1974 if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
1975 int urilen = msg->sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1976
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1977 if (urilen >= REQURI_LEN)
1978 urilen = REQURI_LEN - 1;
1979 memcpy(txn->uri, &req->data[msg->som], urilen);
1980 txn->uri[urilen] = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1981
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1982 if (!(s->logs.logwait &= ~LW_REQ))
1983 s->do_log(s);
1984 } else {
1985 Alert("HTTP logging : out of memory.\n");
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]1986 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1987 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]1988
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1989 /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]1990 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
1991 goto return_bad_req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]1992
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]1993 /* 5: we may need to capture headers */
1994 if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
1995 capture_headers(req->data + msg->som, &txn->hdr_idx,
1996 txn->req.cap, s->fe->req_cap);
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1997
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]1998 /* end of job, return OK */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]1999 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2000 req->analyse_exp = TICK_ETERNITY;
2001 return 1;
2002
2003 return_bad_req:
2004 /* We centralize bad requests processing here */
2005 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2006 /* we detected a parsing error. We want to archive this request
2007 * in the dedicated proxy area for later troubleshooting.
2008 */
2009 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2010 }
2011
2012 txn->req.msg_state = HTTP_MSG_ERROR;
2013 txn->status = 400;
2014 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2015 s->fe->failed_req++;
2016
2017 return_prx_cond:
2018 if (!(s->flags & SN_ERR_MASK))
2019 s->flags |= SN_ERR_PRXCOND;
2020 if (!(s->flags & SN_FINST_MASK))
2021 s->flags |= SN_FINST_R;
2022
2023 req->analysers = 0;
2024 req->analyse_exp = TICK_ETERNITY;
2025 return 0;
2026}
2027
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2028/* This stream analyser runs all HTTP request processing which is common to
2029 * frontends and backends, which means blocking ACLs, filters, connection-close,
2030 * reqadd, stats and redirects. This is performed for the designated proxy.
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2031 * 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]2032 * either needs more data or wants to immediately abort the request (eg: deny,
2033 * error, ...).
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2034 */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2035int 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]2036{
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2037 struct http_txn *txn = &s->txn;
2038 struct http_msg *msg = &txn->req;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2039 struct acl_cond *cond;
2040 struct redirect_rule *rule;
2041 int cur_idx;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2042
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2043 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
2044 /* we need more data */
2045 buffer_write_dis(req);
2046 return 0;
2047 }
2048
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2049 req->analysers &= ~an_bit;
Willy Tarreaud787e662009-07-07 10:14:51 +0200[diff] [blame]2050 req->analyse_exp = TICK_ETERNITY;
2051
2052 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2053 now_ms, __FUNCTION__,
2054 s,
2055 req,
2056 req->rex, req->wex,
2057 req->flags,
2058 req->l,
2059 req->analysers);
2060
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2061 /* first check whether we have some ACLs set to block this request */
2062 list_for_each_entry(cond, &px->block_cond, list) {
2063 int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreaub463dfb2008-06-07 23:08:56 +0200[diff] [blame]2064
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2065 ret = acl_pass(ret);
2066 if (cond->pol == ACL_COND_UNLESS)
2067 ret = !ret;
Willy Tarreau53b6c742006-12-17 13:37:46 +0100[diff] [blame]2068
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2069 if (ret) {
2070 txn->status = 403;
2071 /* let's log the request time */
2072 s->logs.tv_request = now;
2073 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2074 goto return_prx_cond;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2075 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2076 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2077
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2078 /* try headers filters */
2079 if (px->req_exp != NULL) {
2080 if (apply_filters_to_request(s, req, px->req_exp) < 0)
2081 goto return_bad_req;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2082
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2083 /* has the request been denied ? */
2084 if (txn->flags & TX_CLDENY) {
2085 /* no need to go further */
2086 txn->status = 403;
2087 /* let's log the request time */
2088 s->logs.tv_request = now;
2089 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
2090 goto return_prx_cond;
2091 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2092 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2093
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2094 /* We might have to check for "Connection:" */
2095 if (((s->fe->options | s->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
2096 !(s->flags & SN_CONN_CLOSED)) {
2097 char *cur_ptr, *cur_end, *cur_next;
2098 int old_idx, delta, val;
2099 struct hdr_idx_elem *cur_hdr;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2100
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2101 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
2102 old_idx = 0;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2103
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2104 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
2105 cur_hdr = &txn->hdr_idx.v[cur_idx];
2106 cur_ptr = cur_next;
2107 cur_end = cur_ptr + cur_hdr->len;
2108 cur_next = cur_end + cur_hdr->cr + 1;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2109
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2110 val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
2111 if (val) {
2112 /* 3 possibilities :
2113 * - we have already set Connection: close,
2114 * so we remove this line.
2115 * - we have not yet set Connection: close,
2116 * but this line indicates close. We leave
2117 * it untouched and set the flag.
2118 * - we have not yet set Connection: close,
2119 * and this line indicates non-close. We
2120 * replace it.
2121 */
2122 if (s->flags & SN_CONN_CLOSED) {
2123 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
2124 txn->req.eoh += delta;
2125 cur_next += delta;
2126 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
2127 txn->hdr_idx.used--;
2128 cur_hdr->len = 0;
2129 } else {
2130 if (strncasecmp(cur_ptr + val, "close", 5) != 0) {
2131 delta = buffer_replace2(req, cur_ptr + val, cur_end,
2132 "close", 5);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2133 cur_next += delta;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2134 cur_hdr->len += delta;
2135 txn->req.eoh += delta;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2136 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2137 s->flags |= SN_CONN_CLOSED;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]2138 }
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2139 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2140 old_idx = cur_idx;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2141 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2142 }
2143 /* add request headers from the rule sets in the same order */
2144 for (cur_idx = 0; cur_idx < px->nb_reqadd; cur_idx++) {
2145 if (unlikely(http_header_add_tail(req,
2146 &txn->req,
2147 &txn->hdr_idx,
2148 px->req_add[cur_idx])) < 0)
2149 goto return_bad_req;
2150 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]2151
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2152 /* check if stats URI was requested, and if an auth is needed */
2153 if (px->uri_auth != NULL &&
2154 (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)) {
2155 /* we have to check the URI and auth for this request.
2156 * FIXME!!! that one is rather dangerous, we want to
2157 * make it follow standard rules (eg: clear req->analysers).
2158 */
2159 if (stats_check_uri_auth(s, px)) {
2160 req->analysers = 0;
2161 return 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2162 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2163 }
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]2164
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2165 /* check whether we have some ACLs set to redirect this request */
2166 list_for_each_entry(rule, &px->redirect_rules, list) {
2167 int ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2168
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2169 ret = acl_pass(ret);
2170 if (rule->cond->pol == ACL_COND_UNLESS)
2171 ret = !ret;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2172
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2173 if (ret) {
2174 struct chunk rdr = { trash, 0 };
2175 const char *msg_fmt;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2176
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2177 /* build redirect message */
2178 switch(rule->code) {
2179 case 303:
2180 rdr.len = strlen(HTTP_303);
2181 msg_fmt = HTTP_303;
2182 break;
2183 case 301:
2184 rdr.len = strlen(HTTP_301);
2185 msg_fmt = HTTP_301;
2186 break;
2187 case 302:
2188 default:
2189 rdr.len = strlen(HTTP_302);
2190 msg_fmt = HTTP_302;
2191 break;
2192 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2193
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2194 if (unlikely(rdr.len > sizeof(trash)))
2195 goto return_bad_req;
2196 memcpy(rdr.str, msg_fmt, rdr.len);
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2197
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2198 switch(rule->type) {
2199 case REDIRECT_TYPE_PREFIX: {
2200 const char *path;
2201 int pathlen;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2202
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2203 path = http_get_path(txn);
2204 /* build message using path */
2205 if (path) {
2206 pathlen = txn->req.sl.rq.u_l + (txn->req.sol+txn->req.sl.rq.u) - path;
2207 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2208 int qs = 0;
2209 while (qs < pathlen) {
2210 if (path[qs] == '?') {
2211 pathlen = qs;
2212 break;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2213 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2214 qs++;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2215 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2216 }
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2217 } else {
2218 path = "/";
2219 pathlen = 1;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2220 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2221
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2222 if (rdr.len + rule->rdr_len + pathlen > sizeof(trash) - 4)
2223 goto return_bad_req;
2224
2225 /* add prefix. Note that if prefix == "/", we don't want to
2226 * add anything, otherwise it makes it hard for the user to
2227 * configure a self-redirection.
2228 */
2229 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2230 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
2231 rdr.len += rule->rdr_len;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2232 }
2233
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2234 /* add path */
2235 memcpy(rdr.str + rdr.len, path, pathlen);
2236 rdr.len += pathlen;
2237 break;
2238 }
2239 case REDIRECT_TYPE_LOCATION:
2240 default:
2241 if (rdr.len + rule->rdr_len > sizeof(trash) - 4)
2242 goto return_bad_req;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2243
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2244 /* add location */
2245 memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
2246 rdr.len += rule->rdr_len;
2247 break;
2248 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2249
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2250 if (rule->cookie_len) {
2251 memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
2252 rdr.len += 14;
2253 memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
2254 rdr.len += rule->cookie_len;
2255 memcpy(rdr.str + rdr.len, "\r\n", 2);
2256 rdr.len += 2;
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2257 }
Willy Tarreau06b917c2009-07-06 16:34:52 +0200[diff] [blame]2258
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2259 /* add end of headers */
2260 memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
2261 rdr.len += 4;
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2262
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2263 txn->status = rule->code;
2264 /* let's log the request time */
2265 s->logs.tv_request = now;
2266 stream_int_retnclose(req->prod, &rdr);
2267 goto return_prx_cond;
2268 }
2269 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2270
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2271 /* that's OK for us now, let's move on to next analysers */
2272 return 1;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]2273
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2274 return_bad_req:
2275 /* We centralize bad requests processing here */
2276 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
2277 /* we detected a parsing error. We want to archive this request
2278 * in the dedicated proxy area for later troubleshooting.
2279 */
2280 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
2281 }
Willy Tarreau55ea7572007-06-17 19:56:27 +0200[diff] [blame]2282
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2283 txn->req.msg_state = HTTP_MSG_ERROR;
2284 txn->status = 400;
2285 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2286 s->fe->failed_req++;
Willy Tarreau6e4261e2007-09-18 18:36:05 +0200[diff] [blame]2287
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2288 return_prx_cond:
2289 if (!(s->flags & SN_ERR_MASK))
2290 s->flags |= SN_ERR_PRXCOND;
2291 if (!(s->flags & SN_FINST_MASK))
2292 s->flags |= SN_FINST_R;
Willy Tarreauf1221aa2006-12-17 22:14:12 +0100[diff] [blame]2293
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2294 req->analysers = 0;
2295 req->analyse_exp = TICK_ETERNITY;
2296 return 0;
2297}
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2298
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2299/* This function performs all the processing enabled for the current request.
2300 * It returns 1 if the processing can continue on next analysers, or zero if it
2301 * needs more data, encounters an error, or wants to immediately abort the
2302 * request. It relies on buffers flags, and updates s->req->analysers.
2303 */
2304int http_process_request(struct session *s, struct buffer *req, int an_bit)
2305{
2306 struct http_txn *txn = &s->txn;
2307 struct http_msg *msg = &txn->req;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2308
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2309 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
2310 /* we need more data */
2311 buffer_write_dis(req);
2312 return 0;
2313 }
2314
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]2315 req->analysers &= ~an_bit;
2316 req->analyse_exp = TICK_ETERNITY;
2317
2318 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
2319 now_ms, __FUNCTION__,
2320 s,
2321 req,
2322 req->rex, req->wex,
2323 req->flags,
2324 req->l,
2325 req->analysers);
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2326
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2327 /*
2328 * Right now, we know that we have processed the entire headers
2329 * and that unwanted requests have been filtered out. We can do
2330 * whatever we want with the remaining request. Also, now we
2331 * may have separate values for ->fe, ->be.
2332 */
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2333
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2334 /*
2335 * If HTTP PROXY is set we simply get remote server address
2336 * parsing incoming request.
2337 */
2338 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
2339 url2sa(req->data + msg->sl.rq.u, msg->sl.rq.u_l, &s->srv_addr);
2340 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2341
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2342 /*
2343 * 7: the appsession cookie was looked up very early in 1.2,
2344 * so let's do the same now.
2345 */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]2346
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2347 /* It needs to look into the URI */
2348 if (s->be->appsession_name) {
2349 get_srv_from_appsession(s, &req->data[msg->som], msg->sl.rq.l);
2350 }
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]2351
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2352 /*
2353 * 8: Now we can work with the cookies.
2354 * Note that doing so might move headers in the request, but
2355 * the fields will stay coherent and the URI will not move.
2356 * This should only be performed in the backend.
2357 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]2358 if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2359 && !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
2360 manage_client_side_cookies(s, req);
Willy Tarreau7ac51f62007-03-25 16:00:04 +0200[diff] [blame]2361
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2362 /*
2363 * 9: add X-Forwarded-For if either the frontend or the backend
2364 * asks for it.
2365 */
2366 if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
2367 if (s->cli_addr.ss_family == AF_INET) {
2368 /* Add an X-Forwarded-For header unless the source IP is
2369 * in the 'except' network range.
2370 */
2371 if ((!s->fe->except_mask.s_addr ||
2372 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr)
2373 != s->fe->except_net.s_addr) &&
2374 (!s->be->except_mask.s_addr ||
2375 (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr)
2376 != s->be->except_net.s_addr)) {
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]2377 int len;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2378 unsigned char *pn;
2379 pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr;
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]2380
2381 /* Note: we rely on the backend to get the header name to be used for
2382 * x-forwarded-for, because the header is really meant for the backends.
2383 * However, if the backend did not specify any option, we have to rely
2384 * on the frontend's header name.
2385 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2386 if (s->be->fwdfor_hdr_len) {
2387 len = s->be->fwdfor_hdr_len;
2388 memcpy(trash, s->be->fwdfor_hdr_name, len);
Ross Westaf72a1d2008-08-03 10:51:45 +0200[diff] [blame]2389 } else {
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2390 len = s->fe->fwdfor_hdr_len;
2391 memcpy(trash, s->fe->fwdfor_hdr_name, len);
2392 }
2393 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]2394
Willy Tarreau4af6f3a2007-03-18 22:36:26 +0100[diff] [blame]2395 if (unlikely(http_header_add_tail2(req, &txn->req,
2396 &txn->hdr_idx, trash, len)) < 0)
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2397 goto return_bad_req;
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]2398 }
2399 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2400 else if (s->cli_addr.ss_family == AF_INET6) {
2401 /* FIXME: for the sake of completeness, we should also support
2402 * 'except' here, although it is mostly useless in this case.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2403 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2404 int len;
2405 char pn[INET6_ADDRSTRLEN];
2406 inet_ntop(AF_INET6,
2407 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
2408 pn, sizeof(pn));
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2409
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2410 /* Note: we rely on the backend to get the header name to be used for
2411 * x-forwarded-for, because the header is really meant for the backends.
2412 * However, if the backend did not specify any option, we have to rely
2413 * on the frontend's header name.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2414 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2415 if (s->be->fwdfor_hdr_len) {
2416 len = s->be->fwdfor_hdr_len;
2417 memcpy(trash, s->be->fwdfor_hdr_name, len);
2418 } else {
2419 len = s->fe->fwdfor_hdr_len;
2420 memcpy(trash, s->fe->fwdfor_hdr_name, len);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2421 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2422 len += sprintf(trash + len, ": %s", pn);
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2423
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2424 if (unlikely(http_header_add_tail2(req, &txn->req,
2425 &txn->hdr_idx, trash, len)) < 0)
2426 goto return_bad_req;
2427 }
2428 }
2429
2430 /*
Maik Broemme2850cb42009-04-17 18:53:21 +0200[diff] [blame]2431 * 10: add X-Original-To if either the frontend or the backend
2432 * asks for it.
2433 */
2434 if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
2435
2436 /* FIXME: don't know if IPv6 can handle that case too. */
2437 if (s->cli_addr.ss_family == AF_INET) {
2438 /* Add an X-Original-To header unless the destination IP is
2439 * in the 'except' network range.
2440 */
2441 if (!(s->flags & SN_FRT_ADDR_SET))
2442 get_frt_addr(s);
2443
2444 if ((!s->fe->except_mask_to.s_addr ||
2445 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
2446 != s->fe->except_to.s_addr) &&
2447 (!s->be->except_mask_to.s_addr ||
2448 (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
2449 != s->be->except_to.s_addr)) {
2450 int len;
2451 unsigned char *pn;
2452 pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr;
2453
2454 /* Note: we rely on the backend to get the header name to be used for
2455 * x-original-to, because the header is really meant for the backends.
2456 * However, if the backend did not specify any option, we have to rely
2457 * on the frontend's header name.
2458 */
2459 if (s->be->orgto_hdr_len) {
2460 len = s->be->orgto_hdr_len;
2461 memcpy(trash, s->be->orgto_hdr_name, len);
2462 } else {
2463 len = s->fe->orgto_hdr_len;
2464 memcpy(trash, s->fe->orgto_hdr_name, len);
2465 }
2466 len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
2467
2468 if (unlikely(http_header_add_tail2(req, &txn->req,
2469 &txn->hdr_idx, trash, len)) < 0)
2470 goto return_bad_req;
2471 }
2472 }
2473 }
2474
2475 /*
2476 * 11: add "Connection: close" if needed and not yet set.
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2477 * Note that we do not need to add it in case of HTTP/1.0.
2478 */
2479 if (!(s->flags & SN_CONN_CLOSED) &&
2480 ((s->fe->options | s->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) {
2481 if ((unlikely(msg->sl.rq.v_l != 8) ||
2482 unlikely(req->data[msg->som + msg->sl.rq.v + 7] != '0')) &&
2483 unlikely(http_header_add_tail2(req, &txn->req, &txn->hdr_idx,
2484 "Connection: close", 17)) < 0)
2485 goto return_bad_req;
2486 s->flags |= SN_CONN_CLOSED;
2487 }
2488 /* Before we switch to data, was assignment set in manage_client_side_cookie?
2489 * If not assigned, perhaps we are balancing on url_param, but this is a
2490 * POST; and the parameters are in the body, maybe scan there to find our server.
2491 * (unless headers overflowed the buffer?)
2492 */
2493 if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
2494 s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
2495 s->be->url_param_post_limit != 0 && !(req->flags & BF_FULL) &&
2496 memchr(msg->sol + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) {
2497 /* are there enough bytes here? total == l || r || rlim ?
2498 * len is unsigned, but eoh is int,
2499 * how many bytes of body have we received?
2500 * eoh is the first empty line of the header
2501 */
2502 /* already established CRLF or LF at eoh, move to start of message, find message length in buffer */
2503 unsigned long len = req->l - (msg->sol[msg->eoh] == '\r' ? msg->eoh + 2 : msg->eoh + 1);
2504
2505 /* If we have HTTP/1.1 and Expect: 100-continue, then abort.
2506 * We can't assume responsibility for the server's decision,
2507 * on this URI and header set. See rfc2616: 14.20, 8.2.3,
2508 * We also can't change our mind later, about which server to choose, so round robin.
2509 */
2510 if ((likely(msg->sl.rq.v_l == 8) && req->data[msg->som + msg->sl.rq.v + 7] == '1')) {
2511 struct hdr_ctx ctx;
2512 ctx.idx = 0;
2513 /* Expect is allowed in 1.1, look for it */
2514 http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx);
2515 if (ctx.idx != 0 &&
2516 unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0))
2517 /* We can't reliablly stall and wait for data, because of
2518 * .NET clients that don't conform to rfc2616; so, no need for
2519 * the next block to check length expectations.
2520 * We could send 100 status back to the client, but then we need to
2521 * re-write headers, and send the message. And this isn't the right
2522 * place for that action.
2523 * TODO: support Expect elsewhere and delete this block.
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2524 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2525 goto end_check_maybe_wait_for_body;
2526 }
2527
2528 if (likely(len > s->be->url_param_post_limit)) {
2529 /* nothing to do, we got enough */
2530 } else {
2531 /* limit implies we are supposed to need this many bytes
2532 * to find the parameter. Let's see how many bytes we can wait for.
2533 */
2534 long long hint = len;
2535 struct hdr_ctx ctx;
2536 ctx.idx = 0;
2537 http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx);
2538 if (ctx.idx && ctx.vlen >= 7 && strncasecmp(ctx.line+ctx.val, "chunked", 7) == 0) {
2539 buffer_write_dis(req);
2540 req->analysers |= AN_REQ_HTTP_BODY;
2541 }
2542 else {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2543 ctx.idx = 0;
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2544 http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx);
2545 /* now if we have a length, we'll take the hint */
2546 if (ctx.idx) {
2547 /* We have Content-Length */
2548 if (strl2llrc(ctx.line+ctx.val,ctx.vlen, &hint))
2549 hint = 0; /* parse failure, untrusted client */
2550 else {
2551 if (hint > 0)
2552 msg->hdr_content_len = hint;
2553 else
2554 hint = 0; /* bad client, sent negative length */
2555 }
2556 }
2557 /* but limited to what we care about, maybe we don't expect any entity data (hint == 0) */
2558 if (s->be->url_param_post_limit < hint)
2559 hint = s->be->url_param_post_limit;
2560 /* now do we really need to buffer more data? */
2561 if (len < hint) {
Willy Tarreau3da77c52008-08-29 09:58:42 +0200[diff] [blame]2562 buffer_write_dis(req);
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2563 req->analysers |= AN_REQ_HTTP_BODY;
Willy Tarreau41f40ed2008-08-21 10:05:00 +0200[diff] [blame]2564 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2565 /* else... There are no body bytes to wait for */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200[diff] [blame]2566 }
2567 }
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2568 }
2569 end_check_maybe_wait_for_body:
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2570
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2571 /*************************************************************
2572 * OK, that's finished for the headers. We have done what we *
2573 * could. Let's switch to the DATA state. *
2574 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2575
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2576 buffer_set_rlim(req, BUFSIZE); /* no more rewrite needed */
2577 s->logs.tv_request = now;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2578
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2579 /* When a connection is tarpitted, we use the tarpit timeout,
2580 * which may be the same as the connect timeout if unspecified.
2581 * If unset, then set it to zero because we really want it to
2582 * eventually expire. We build the tarpit as an analyser.
2583 */
2584 if (txn->flags & TX_CLTARPIT) {
Willy Tarreau6f0aa472009-03-08 20:33:29 +0100[diff] [blame]2585 buffer_erase(s->req);
2586 /* wipe the request out so that we can drop the connection early
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2587 * if the client closes first.
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]2588 */
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2589 buffer_write_dis(req);
2590 req->analysers |= AN_REQ_HTTP_TARPIT;
2591 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
2592 if (!req->analyse_exp)
Willy Tarreau2ab85e62009-03-29 10:24:15 +0200[diff] [blame]2593 req->analyse_exp = tick_add(now_ms, 0);
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2594 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2595
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2596 /* OK let's go on with the BODY now */
2597 return 1;
Willy Tarreau06619262006-12-17 08:37:22 +0100[diff] [blame]2598
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2599 return_bad_req: /* let's centralize all bad requests */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2600 if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2601 /* we detected a parsing error. We want to archive this request
2602 * in the dedicated proxy area for later troubleshooting.
2603 */
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2604 http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2605 }
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2606
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2607 txn->req.msg_state = HTTP_MSG_ERROR;
2608 txn->status = 400;
2609 req->analysers = 0;
2610 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
2611 s->fe->failed_req++;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2612
Willy Tarreau59234e92008-11-30 23:51:27 +0100[diff] [blame]2613 if (!(s->flags & SN_ERR_MASK))
2614 s->flags |= SN_ERR_PRXCOND;
2615 if (!(s->flags & SN_FINST_MASK))
2616 s->flags |= SN_FINST_R;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2617 return 0;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2618}
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2619
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2620/* This function is an analyser which processes the HTTP tarpit. It always
2621 * returns zero, at the beginning because it prevents any other processing
2622 * from occurring, and at the end because it terminates the request.
2623 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2624int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2625{
2626 struct http_txn *txn = &s->txn;
2627
2628 /* This connection is being tarpitted. The CLIENT side has
2629 * already set the connect expiration date to the right
2630 * timeout. We just have to check that the client is still
2631 * there and that the timeout has not expired.
2632 */
2633 if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
2634 !tick_is_expired(req->analyse_exp, now_ms))
2635 return 0;
2636
2637 /* We will set the queue timer to the time spent, just for
2638 * logging purposes. We fake a 500 server error, so that the
2639 * attacker will not suspect his connection has been tarpitted.
2640 * It will not cause trouble to the logs because we can exclude
2641 * the tarpitted connections by filtering on the 'PT' status flags.
2642 */
Willy Tarreau60b85b02008-11-30 23:28:40 +0100[diff] [blame]2643 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
2644
2645 txn->status = 500;
2646 if (req->flags != BF_READ_ERROR)
2647 stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
2648
2649 req->analysers = 0;
2650 req->analyse_exp = TICK_ETERNITY;
2651
2652 s->fe->failed_req++;
2653 if (!(s->flags & SN_ERR_MASK))
2654 s->flags |= SN_ERR_PRXCOND;
2655 if (!(s->flags & SN_FINST_MASK))
2656 s->flags |= SN_FINST_T;
2657 return 0;
2658}
2659
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2660/* This function is an analyser which processes the HTTP request body. It looks
2661 * for parameters to be used for the load balancing algorithm (url_param). It
2662 * must only be called after the standard HTTP request processing has occurred,
2663 * because it expects the request to be parsed. It returns zero if it needs to
2664 * read more data, or 1 once it has completed its analysis.
2665 */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2666int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2667{
2668 struct http_msg *msg = &s->txn.req;
2669 unsigned long body = msg->sol[msg->eoh] == '\r' ? msg->eoh + 2 : msg->eoh + 1;
2670 long long limit = s->be->url_param_post_limit;
2671 struct hdr_ctx ctx;
2672
Willy Tarreau51aecc72009-07-12 09:47:04 +0200[diff] [blame]2673 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
2674 /* we need more data */
2675 buffer_write_dis(req);
2676 return 0;
2677 }
2678
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2679 /* We have to parse the HTTP request body to find any required data.
2680 * "balance url_param check_post" should have been the only way to get
2681 * into this. We were brought here after HTTP header analysis, so all
2682 * related structures are ready.
2683 */
2684
2685 ctx.idx = 0;
2686
2687 /* now if we have a length, we'll take the hint */
2688 http_find_header2("Transfer-Encoding", 17, msg->sol, &s->txn.hdr_idx, &ctx);
2689 if (ctx.idx && ctx.vlen >= 7 && strncasecmp(ctx.line+ctx.val, "chunked", 7) == 0) {
2690 unsigned int chunk = 0;
2691 while (body < req->l && !HTTP_IS_CRLF(msg->sol[body])) {
2692 char c = msg->sol[body];
2693 if (ishex(c)) {
2694 unsigned int hex = toupper(c) - '0';
2695 if (hex > 9)
2696 hex -= 'A' - '9' - 1;
2697 chunk = (chunk << 4) | hex;
2698 } else
2699 break;
2700 body++;
2701 }
2702 if (body + 2 >= req->l) /* we want CRLF too */
2703 goto http_body_end; /* end of buffer? data missing! */
2704
2705 if (memcmp(msg->sol+body, "\r\n", 2) != 0)
2706 goto http_body_end; /* chunked encoding len ends with CRLF, and we don't have it yet */
2707
2708 body += 2; // skip CRLF
2709
2710 /* if we support more then one chunk here, we have to do it again when assigning server
2711 * 1. how much entity data do we have? new var
2712 * 2. should save entity_start, entity_cursor, elen & rlen in req; so we don't repeat scanning here
2713 * 3. test if elen > limit, or set new limit to elen if 0 (end of entity found)
2714 */
2715
2716 if (chunk < limit)
2717 limit = chunk; /* only reading one chunk */
2718 } else {
2719 if (msg->hdr_content_len < limit)
2720 limit = msg->hdr_content_len;
2721 }
2722
2723 http_body_end:
2724 /* we leave once we know we have nothing left to do. This means that we have
2725 * enough bytes, or that we know we'll not get any more (buffer full, read
2726 * buffer closed).
2727 */
2728 if (req->l - body >= limit || /* enough bytes! */
2729 req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR | BF_READ_TIMEOUT) ||
2730 tick_is_expired(req->analyse_exp, now_ms)) {
2731 /* The situation will not evolve, so let's give up on the analysis. */
2732 s->logs.tv_request = now; /* update the request timer to reflect full request */
Willy Tarreau3a816292009-07-07 10:55:49 +0200[diff] [blame]2733 req->analysers &= ~an_bit;
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2734 req->analyse_exp = TICK_ETERNITY;
2735 return 1;
2736 }
2737 else {
2738 /* Not enough data. We'll re-use the http-request
2739 * timeout here. Ideally, we should set the timeout
2740 * relative to the accept() date. We just set the
2741 * request timeout once at the beginning of the
2742 * request.
2743 */
2744 buffer_write_dis(req);
2745 if (!tick_isset(req->analyse_exp))
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200[diff] [blame]2746 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Willy Tarreaud34af782008-11-30 23:36:37 +0100[diff] [blame]2747 return 0;
2748 }
2749}
2750
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2751/* This function performs all the processing enabled for the current response.
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2752 * It normally returns zero, but may return 1 if it absolutely needs to be
2753 * called again after other functions. It relies on buffers flags, and updates
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2754 * t->rep->analysers. It might make sense to explode it into several other
Willy Tarreau41f40ed2008-08-21 10:05:00 +0200[diff] [blame]2755 * functions. It works like process_request (see indications above).
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2756 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2757int process_response(struct session *t)
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2758{
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2759 struct http_txn *txn = &t->txn;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2760 struct buffer *req = t->req;
2761 struct buffer *rep = t->rep;
Willy Tarreauadfb8562008-08-11 15:24:42 +0200[diff] [blame]2762
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]2763 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]2764 now_ms, __FUNCTION__,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]2765 t,
2766 rep,
2767 rep->rex, rep->wex,
2768 rep->flags,
2769 rep->l,
2770 rep->analysers);
Willy Tarreau67f0eea2008-08-10 22:55:22 +0200[diff] [blame]2771
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2772 if (rep->analysers & AN_RTR_HTTP_HDR) { /* receiving server headers */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2773 /*
2774 * Now parse the partial (or complete) lines.
2775 * We will check the response syntax, and also join multi-line
2776 * headers. An index of all the lines will be elaborated while
2777 * parsing.
2778 *
2779 * For the parsing, we use a 28 states FSM.
2780 *
2781 * Here is the information we currently have :
Willy Tarreaue393fe22008-08-16 22:18:07 +0200[diff] [blame]2782 * rep->data + rep->som = beginning of response
2783 * rep->data + rep->eoh = end of processed headers / start of current one
2784 * rep->data + rep->eol = end of current header or line (LF or CRLF)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2785 * rep->lr = first non-visited byte
2786 * rep->r = end of data
2787 */
Willy Tarreau7f875f62008-08-11 17:35:01 +0200[diff] [blame]2788
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2789 int cur_idx;
2790 struct http_msg *msg = &txn->rsp;
2791 struct proxy *cur_proxy;
2792
2793 if (likely(rep->lr < rep->r))
2794 http_msg_analyzer(rep, msg, &txn->hdr_idx);
2795
2796 /* 1: we might have to print this header in debug mode */
2797 if (unlikely((global.mode & MODE_DEBUG) &&
2798 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
2799 (msg->msg_state == HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
2800 char *eol, *sol;
2801
2802 sol = rep->data + msg->som;
2803 eol = sol + msg->sl.rq.l;
2804 debug_hdr("srvrep", t, sol, eol);
2805
2806 sol += hdr_idx_first_pos(&txn->hdr_idx);
2807 cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
2808
2809 while (cur_idx) {
2810 eol = sol + txn->hdr_idx.v[cur_idx].len;
2811 debug_hdr("srvhdr", t, sol, eol);
2812 sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
2813 cur_idx = txn->hdr_idx.v[cur_idx].next;
Willy Tarreauc65a3ba2008-08-11 23:42:50 +0200[diff] [blame]2814 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2815 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2816
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2817 /*
2818 * Now we quickly check if we have found a full valid response.
2819 * If not so, we check the FD and buffer states before leaving.
2820 * A full response is indicated by the fact that we have seen
2821 * the double LF/CRLF, so the state is HTTP_MSG_BODY. Invalid
2822 * responses are checked first.
2823 *
2824 * Depending on whether the client is still there or not, we
2825 * may send an error response back or not. Note that normally
2826 * we should only check for HTTP status there, and check I/O
2827 * errors somewhere else.
2828 */
2829
2830 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2831 /* Invalid response */
2832 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
Willy Tarreauf073a832009-03-01 23:21:47 +0100[diff] [blame]2833 /* we detected a parsing error. We want to archive this response
2834 * in the dedicated proxy area for later troubleshooting.
2835 */
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2836 hdr_response_bad:
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2837 if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
2838 http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
2839
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2840 buffer_shutr_now(rep);
2841 buffer_shutw_now(req);
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]2842 if (t->srv)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2843 t->srv->failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2844 t->be->failed_resp++;
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2845 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2846 txn->status = 502;
Willy Tarreau81acfab2008-11-30 19:22:53 +0100[diff] [blame]2847 stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2848 if (!(t->flags & SN_ERR_MASK))
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2849 t->flags |= SN_ERR_PRXCOND;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2850 if (!(t->flags & SN_FINST_MASK))
2851 t->flags |= SN_FINST_H;
Willy Tarreau461f6622008-08-15 23:43:19 +0200[diff] [blame]2852
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2853 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2854 }
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2855 /* too large response does not fit in buffer. */
2856 else if (rep->flags & BF_FULL) {
2857 goto hdr_response_bad;
2858 }
2859 /* read error */
2860 else if (rep->flags & BF_READ_ERROR) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2861 if (msg->err_pos >= 0)
2862 http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2863 buffer_shutr_now(rep);
2864 buffer_shutw_now(req);
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]2865 if (t->srv)
2866 t->srv->failed_resp++;
2867 t->be->failed_resp++;
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2868 rep->analysers = 0;
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2869 txn->status = 502;
Willy Tarreau81acfab2008-11-30 19:22:53 +0100[diff] [blame]2870 stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2871 if (!(t->flags & SN_ERR_MASK))
2872 t->flags |= SN_ERR_SRVCL;
2873 if (!(t->flags & SN_FINST_MASK))
2874 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2875 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2876 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2877 /* read timeout : return a 504 to the client. */
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2878 else if (rep->flags & BF_READ_TIMEOUT) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2879 if (msg->err_pos >= 0)
2880 http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]2881 buffer_shutr_now(rep);
2882 buffer_shutw_now(req);
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]2883 if (t->srv)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2884 t->srv->failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2885 t->be->failed_resp++;
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2886 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2887 txn->status = 504;
Willy Tarreau81acfab2008-11-30 19:22:53 +0100[diff] [blame]2888 stream_int_return(rep->cons, error_message(t, HTTP_ERR_504));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2889 if (!(t->flags & SN_ERR_MASK))
2890 t->flags |= SN_ERR_SRVTO;
2891 if (!(t->flags & SN_FINST_MASK))
2892 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]2893 return 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2894 }
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]2895 /* close from server */
2896 else if (rep->flags & BF_SHUTR) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2897 if (msg->err_pos >= 0)
2898 http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2899 buffer_shutw_now(req);
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]2900 if (t->srv)
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2901 t->srv->failed_resp++;
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2902 t->be->failed_resp++;
2903 rep->analysers = 0;
2904 txn->status = 502;
Willy Tarreau81acfab2008-11-30 19:22:53 +0100[diff] [blame]2905 stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2906 if (!(t->flags & SN_ERR_MASK))
2907 t->flags |= SN_ERR_SRVCL;
2908 if (!(t->flags & SN_FINST_MASK))
2909 t->flags |= SN_FINST_H;
Willy Tarreauf9839bd2008-08-27 23:57:16 +0200[diff] [blame]2910 return 0;
2911 }
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]2912 /* write error to client (we don't send any message then) */
2913 else if (rep->flags & BF_WRITE_ERROR) {
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2914 if (msg->err_pos >= 0)
2915 http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]2916 buffer_shutr_now(rep);
2917 t->be->failed_resp++;
2918 rep->analysers = 0;
2919 if (!(t->flags & SN_ERR_MASK))
2920 t->flags |= SN_ERR_CLICL;
2921 if (!(t->flags & SN_FINST_MASK))
2922 t->flags |= SN_FINST_H;
2923 return 0;
2924 }
Willy Tarreau3da77c52008-08-29 09:58:42 +0200[diff] [blame]2925 buffer_write_dis(rep);
Willy Tarreaucebf57e2008-08-15 18:16:37 +0200[diff] [blame]2926 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2927 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]2928
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2929
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2930 /*****************************************************************
2931 * More interesting part now : we know that we have a complete *
2932 * response which at least looks like HTTP. We have an indicator *
2933 * of each header's length, so we can parse them quickly. *
2934 ****************************************************************/
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2935
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]2936 if (msg->err_pos >= 0)
2937 http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
2938
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]2939 rep->analysers &= ~AN_RTR_HTTP_HDR;
Willy Tarreaua7c52762008-08-16 18:40:18 +0200[diff] [blame]2940
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2941 /* ensure we keep this pointer to the beginning of the message */
2942 msg->sol = rep->data + msg->som;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2943
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2944 /*
2945 * 1: get the status code and check for cacheability.
2946 */
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2947
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2948 t->logs.logwait &= ~LW_RESP;
2949 txn->status = strl2ui(rep->data + msg->sl.st.c, msg->sl.st.c_l);
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2950
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2951 switch (txn->status) {
2952 case 200:
2953 case 203:
2954 case 206:
2955 case 300:
2956 case 301:
2957 case 410:
2958 /* RFC2616 @13.4:
2959 * "A response received with a status code of
2960 * 200, 203, 206, 300, 301 or 410 MAY be stored
2961 * by a cache (...) unless a cache-control
2962 * directive prohibits caching."
2963 *
2964 * RFC2616 @9.5: POST method :
2965 * "Responses to this method are not cacheable,
2966 * unless the response includes appropriate
2967 * Cache-Control or Expires header fields."
2968 */
2969 if (likely(txn->meth != HTTP_METH_POST) &&
2970 (t->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
2971 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
2972 break;
2973 default:
2974 break;
2975 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]2976
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]2977 /*
2978 * 2: we may need to capture headers
2979 */
2980 if (unlikely((t->logs.logwait & LW_RSPHDR) && t->fe->rsp_cap))
2981 capture_headers(rep->data + msg->som, &txn->hdr_idx,
2982 txn->rsp.cap, t->fe->rsp_cap);
2983
2984 /*
2985 * 3: we will have to evaluate the filters.
2986 * As opposed to version 1.2, now they will be evaluated in the
2987 * filters order and not in the header order. This means that
2988 * each filter has to be validated among all headers.
2989 *
2990 * Filters are tried with ->be first, then with ->fe if it is
2991 * different from ->be.
2992 */
2993
2994 t->flags &= ~SN_CONN_CLOSED; /* prepare for inspection */
2995
2996 cur_proxy = t->be;
2997 while (1) {
2998 struct proxy *rule_set = cur_proxy;
2999
3000 /* try headers filters */
3001 if (rule_set->rsp_exp != NULL) {
3002 if (apply_filters_to_response(t, rep, rule_set->rsp_exp) < 0) {
3003 return_bad_resp:
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]3004 if (t->srv)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3005 t->srv->failed_resp++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3006 cur_proxy->failed_resp++;
3007 return_srv_prx_502:
Willy Tarreaufa7e1022008-10-19 07:30:41 +0200[diff] [blame]3008 buffer_shutr_now(rep);
3009 buffer_shutw_now(req);
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]3010 rep->analysers = 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3011 txn->status = 502;
Willy Tarreau81acfab2008-11-30 19:22:53 +0100[diff] [blame]3012 stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3013 if (!(t->flags & SN_ERR_MASK))
3014 t->flags |= SN_ERR_PRXCOND;
3015 if (!(t->flags & SN_FINST_MASK))
3016 t->flags |= SN_FINST_H;
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3017 return 0;
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3018 }
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3019 }
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]3020
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3021 /* has the response been denied ? */
3022 if (txn->flags & TX_SVDENY) {
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]3023 if (t->srv)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3024 t->srv->failed_secu++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3025 cur_proxy->denied_resp++;
3026 goto return_srv_prx_502;
Willy Tarreau51406232008-03-10 22:04:20 +0100[diff] [blame]3027 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3028
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3029 /* We might have to check for "Connection:" */
3030 if (((t->fe->options | t->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
3031 !(t->flags & SN_CONN_CLOSED)) {
3032 char *cur_ptr, *cur_end, *cur_next;
3033 int cur_idx, old_idx, delta, val;
3034 struct hdr_idx_elem *cur_hdr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3035
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3036 cur_next = rep->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
3037 old_idx = 0;
Willy Tarreau541b5c22008-01-06 23:34:21 +0100[diff] [blame]3038
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3039 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
3040 cur_hdr = &txn->hdr_idx.v[cur_idx];
3041 cur_ptr = cur_next;
3042 cur_end = cur_ptr + cur_hdr->len;
3043 cur_next = cur_end + cur_hdr->cr + 1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3044
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3045 val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
3046 if (val) {
3047 /* 3 possibilities :
3048 * - we have already set Connection: close,
3049 * so we remove this line.
3050 * - we have not yet set Connection: close,
3051 * but this line indicates close. We leave
3052 * it untouched and set the flag.
3053 * - we have not yet set Connection: close,
3054 * and this line indicates non-close. We
3055 * replace it.
3056 */
3057 if (t->flags & SN_CONN_CLOSED) {
3058 delta = buffer_replace2(rep, cur_ptr, cur_next, NULL, 0);
3059 txn->rsp.eoh += delta;
3060 cur_next += delta;
3061 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
3062 txn->hdr_idx.used--;
3063 cur_hdr->len = 0;
3064 } else {
3065 if (strncasecmp(cur_ptr + val, "close", 5) != 0) {
3066 delta = buffer_replace2(rep, cur_ptr + val, cur_end,
3067 "close", 5);
3068 cur_next += delta;
3069 cur_hdr->len += delta;
3070 txn->rsp.eoh += delta;
3071 }
3072 t->flags |= SN_CONN_CLOSED;
3073 }
3074 }
3075 old_idx = cur_idx;
Willy Tarreau541b5c22008-01-06 23:34:21 +0100[diff] [blame]3076 }
3077 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3078
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3079 /* add response headers from the rule sets in the same order */
3080 for (cur_idx = 0; cur_idx < rule_set->nb_rspadd; cur_idx++) {
3081 if (unlikely(http_header_add_tail(rep, &txn->rsp, &txn->hdr_idx,
3082 rule_set->rsp_add[cur_idx])) < 0)
3083 goto return_bad_resp;
Willy Tarreau0bbc3cf2006-10-15 14:26:02 +0200[diff] [blame]3084 }
3085
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3086 /* check whether we're already working on the frontend */
3087 if (cur_proxy == t->fe)
3088 break;
3089 cur_proxy = t->fe;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3090 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3091
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3092 /*
3093 * 4: check for server cookie.
3094 */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]3095 if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3096 || (t->be->options & PR_O_CHK_CACHE))
3097 manage_server_side_cookies(t, rep);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3098
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3099
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3100 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3101 * 5: check for cache-control or pragma headers if required.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3102 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3103 if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0)
3104 check_response_for_cacheability(t, rep);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3105
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3106 /*
3107 * 6: add server cookie in the response if needed
3108 */
3109 if ((t->srv) && !(t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_INS) &&
3110 (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST))) {
3111 int len;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3112
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3113 /* the server is known, it's not the one the client requested, we have to
3114 * insert a set-cookie here, except if we want to insert only on POST
3115 * requests and this one isn't. Note that servers which don't have cookies
3116 * (eg: some backup servers) will return a full cookie removal request.
3117 */
3118 len = sprintf(trash, "Set-Cookie: %s=%s; path=/",
3119 t->be->cookie_name,
3120 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]3121
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3122 if (t->be->cookie_domain)
3123 len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3124
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3125 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
3126 trash, len)) < 0)
3127 goto return_bad_resp;
3128 txn->flags |= TX_SCK_INSERTED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3129
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3130 /* Here, we will tell an eventual cache on the client side that we don't
3131 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
3132 * Some caches understand the correct form: 'no-cache="set-cookie"', but
3133 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
3134 */
3135 if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3136
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3137 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3138
3139 if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
3140 "Cache-control: private", 22)) < 0)
3141 goto return_bad_resp;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3142 }
3143 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3144
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3145
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3146 /*
3147 * 7: check if result will be cacheable with a cookie.
3148 * We'll block the response if security checks have caught
3149 * nasty things such as a cacheable cookie.
3150 */
3151 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) ==
3152 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) &&
3153 (t->be->options & PR_O_CHK_CACHE)) {
3154
3155 /* we're in presence of a cacheable response containing
3156 * a set-cookie header. We'll block it as requested by
3157 * the 'checkcache' option, and send an alert.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3158 */
Willy Tarreau8365f932009-03-15 23:11:49 +0100[diff] [blame]3159 if (t->srv)
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3160 t->srv->failed_secu++;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3161 t->be->denied_resp++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3162
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3163 Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
3164 t->be->id, t->srv?t->srv->id:"<dispatch>");
3165 send_log(t->be, LOG_ALERT,
3166 "Blocking cacheable cookie in response from instance %s, server %s.\n",
3167 t->be->id, t->srv?t->srv->id:"<dispatch>");
3168 goto return_srv_prx_502;
3169 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3170
3171 /*
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3172 * 8: add "Connection: close" if needed and not yet set.
3173 * 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]3174 */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3175 if (!(t->flags & SN_CONN_CLOSED) &&
3176 ((t->fe->options | t->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) {
3177 if ((unlikely(msg->sl.st.v_l != 8) ||
3178 unlikely(req->data[msg->som + 7] != '0')) &&
3179 unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
3180 "Connection: close", 17)) < 0)
3181 goto return_bad_resp;
3182 t->flags |= SN_CONN_CLOSED;
3183 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3184
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3185 /*************************************************************
3186 * OK, that's finished for the headers. We have done what we *
3187 * could. Let's switch to the DATA state. *
3188 ************************************************************/
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3189
Willy Tarreaue393fe22008-08-16 22:18:07 +0200[diff] [blame]3190 buffer_set_rlim(rep, BUFSIZE); /* no more rewrite needed */
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3191 t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3192
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3193 /* if the user wants to log as soon as possible, without counting
3194 * bytes from the server, then this is the right moment. We have
3195 * to temporarily assign bytes_out to log what we currently have.
3196 */
3197 if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
3198 t->logs.t_close = t->logs.t_data; /* to get a valid end date */
3199 t->logs.bytes_out = txn->rsp.eoh;
Willy Tarreaua5555ec2008-11-30 19:02:32 +0100[diff] [blame]3200 t->do_log(t);
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3201 t->logs.bytes_out = 0;
3202 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3203
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3204 /* Note: we must not try to cheat by jumping directly to DATA,
3205 * otherwise we would not let the client side wake up.
3206 */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3207
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3208 return 0;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3209 }
Willy Tarreaudafde432008-08-17 01:00:46 +0200[diff] [blame]3210
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]3211 /* Note: eventhough nobody should set an unknown flag, clearing them right now will
3212 * probably reduce one day's debugging session.
3213 */
3214#ifdef DEBUG_DEV
3215 if (rep->analysers & ~(AN_RTR_HTTP_HDR)) {
3216 fprintf(stderr, "FIXME !!!! unknown analysers flags %s:%d = 0x%08X\n",
3217 __FILE__, __LINE__, rep->analysers);
3218 ABORT_NOW();
3219 }
3220#endif
3221 rep->analysers &= AN_RTR_HTTP_HDR;
Willy Tarreauf5483bf2008-08-14 18:35:40 +0200[diff] [blame]3222 return 0;
3223}
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3224
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3225/*
3226 * Produces data for the session <s> depending on its source. Expects to be
Willy Tarreau1ae3a052008-08-16 10:56:30 +0200[diff] [blame]3227 * called with client socket shut down on input. Right now, only statistics can
Willy Tarreau72b179a2008-08-28 16:01:32 +0200[diff] [blame]3228 * be produced. It stops by itself by unsetting the BF_HIJACK flag from the
3229 * buffer, which it uses to keep on being called when there is free space in
Willy Tarreau01bf8672008-12-07 18:03:29 +0100[diff] [blame]3230 * the buffer, or simply by letting an empty buffer upon return.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3231 */
Willy Tarreau01bf8672008-12-07 18:03:29 +0100[diff] [blame]3232void produce_content(struct session *s, struct buffer *rep)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3233{
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3234 if (s->data_source == DATA_SRC_NONE) {
Willy Tarreau01bf8672008-12-07 18:03:29 +0100[diff] [blame]3235 buffer_stop_hijack(rep);
3236 return;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3237 }
3238 else if (s->data_source == DATA_SRC_STATS) {
Willy Tarreauc0dde7a2007-01-01 21:38:07 +0100[diff] [blame]3239 /* dump server statistics */
Willy Tarreau0a464892008-12-07 18:30:00 +0100[diff] [blame]3240 int ret = stats_dump_http(s, rep, s->be->uri_auth);
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]3241 if (ret >= 0)
Willy Tarreau01bf8672008-12-07 18:03:29 +0100[diff] [blame]3242 return;
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]3243 /* -1 indicates an error */
Willy Tarreauc0dde7a2007-01-01 21:38:07 +0100[diff] [blame]3244 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3245
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]3246 /* unknown data source or internal error */
3247 s->txn.status = 500;
Willy Tarreau01bf8672008-12-07 18:03:29 +0100[diff] [blame]3248 stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_500));
Willy Tarreau91861262007-10-17 17:06:05 +0200[diff] [blame]3249 if (!(s->flags & SN_ERR_MASK))
3250 s->flags |= SN_ERR_PRXCOND;
3251 if (!(s->flags & SN_FINST_MASK))
3252 s->flags |= SN_FINST_R;
Willy Tarreau01bf8672008-12-07 18:03:29 +0100[diff] [blame]3253 buffer_stop_hijack(rep);
3254 return;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]3255}
3256
3257
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3258/* Iterate the same filter through all request headers.
3259 * Returns 1 if this filter can be stopped upon return, otherwise 0.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3260 * Since it can manage the switch to another backend, it updates the per-proxy
3261 * DENY stats.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3262 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3263int 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]3264{
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3265 char term;
3266 char *cur_ptr, *cur_end, *cur_next;
3267 int cur_idx, old_idx, last_hdr;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3268 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3269 struct hdr_idx_elem *cur_hdr;
3270 int len, delta;
Willy Tarreau0f7562b2007-01-07 15:46:13 +0100[diff] [blame]3271
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3272 last_hdr = 0;
3273
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3274 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3275 old_idx = 0;
3276
3277 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3278 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3279 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3280 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3281 (exp->action == ACT_ALLOW ||
3282 exp->action == ACT_DENY ||
3283 exp->action == ACT_TARPIT))
3284 return 0;
3285
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3286 cur_idx = txn->hdr_idx.v[old_idx].next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3287 if (!cur_idx)
3288 break;
3289
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3290 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3291 cur_ptr = cur_next;
3292 cur_end = cur_ptr + cur_hdr->len;
3293 cur_next = cur_end + cur_hdr->cr + 1;
3294
3295 /* Now we have one header between cur_ptr and cur_end,
3296 * and the next header starts at cur_next.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3297 */
3298
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3299 /* The annoying part is that pattern matching needs
3300 * that we modify the contents to null-terminate all
3301 * strings before testing them.
3302 */
3303
3304 term = *cur_end;
3305 *cur_end = '\0';
3306
3307 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
3308 switch (exp->action) {
3309 case ACT_SETBE:
3310 /* It is not possible to jump a second time.
3311 * FIXME: should we return an HTTP/500 here so that
3312 * the admin knows there's a problem ?
3313 */
3314 if (t->be != t->fe)
3315 break;
3316
3317 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3318 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3319 last_hdr = 1;
3320 break;
3321
3322 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3323 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3324 last_hdr = 1;
3325 break;
3326
3327 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3328 txn->flags |= TX_CLDENY;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3329 last_hdr = 1;
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3330 t->be->denied_req++;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3331 break;
3332
3333 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3334 txn->flags |= TX_CLTARPIT;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3335 last_hdr = 1;
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3336 t->be->denied_req++;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3337 break;
3338
3339 case ACT_REPLACE:
3340 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
3341 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
3342 /* FIXME: if the user adds a newline in the replacement, the
3343 * index will not be recalculated for now, and the new line
3344 * will not be counted as a new header.
3345 */
3346
3347 cur_end += delta;
3348 cur_next += delta;
3349 cur_hdr->len += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3350 txn->req.eoh += delta;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3351 break;
3352
3353 case ACT_REMOVE:
3354 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
3355 cur_next += delta;
3356
3357 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3358 txn->req.eoh += delta;
3359 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
3360 txn->hdr_idx.used--;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3361 cur_hdr->len = 0;
3362 cur_end = NULL; /* null-term has been rewritten */
3363 break;
3364
3365 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3366 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3367 if (cur_end)
3368 *cur_end = term; /* restore the string terminator */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3369
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3370 /* keep the link from this header to next one in case of later
3371 * removal of next header.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3372 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3373 old_idx = cur_idx;
3374 }
3375 return 0;
3376}
3377
3378
3379/* Apply the filter to the request line.
3380 * Returns 0 if nothing has been done, 1 if the filter has been applied,
3381 * or -1 if a replacement resulted in an invalid request line.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3382 * Since it can manage the switch to another backend, it updates the per-proxy
3383 * DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3384 */
3385int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
3386{
3387 char term;
3388 char *cur_ptr, *cur_end;
3389 int done;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3390 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3391 int len, delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3392
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3393
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3394 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3395 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3396 else if (unlikely(txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3397 (exp->action == ACT_ALLOW ||
3398 exp->action == ACT_DENY ||
3399 exp->action == ACT_TARPIT))
3400 return 0;
3401 else if (exp->action == ACT_REMOVE)
3402 return 0;
3403
3404 done = 0;
3405
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]3406 cur_ptr = req->data + txn->req.som; /* should be equal to txn->sol */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3407 cur_end = cur_ptr + txn->req.sl.rq.l;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3408
3409 /* Now we have the request line between cur_ptr and cur_end */
3410
3411 /* The annoying part is that pattern matching needs
3412 * that we modify the contents to null-terminate all
3413 * strings before testing them.
3414 */
3415
3416 term = *cur_end;
3417 *cur_end = '\0';
3418
3419 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
3420 switch (exp->action) {
3421 case ACT_SETBE:
3422 /* It is not possible to jump a second time.
3423 * FIXME: should we return an HTTP/500 here so that
3424 * the admin knows there's a problem ?
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3425 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3426 if (t->be != t->fe)
3427 break;
3428
3429 /* Swithing Proxy */
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200[diff] [blame]3430 session_set_backend(t, (struct proxy *)exp->replace);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3431 done = 1;
3432 break;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3433
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3434 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3435 txn->flags |= TX_CLALLOW;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3436 done = 1;
3437 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3438
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3439 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3440 txn->flags |= TX_CLDENY;
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3441 t->be->denied_req++;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3442 done = 1;
3443 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3444
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3445 case ACT_TARPIT:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3446 txn->flags |= TX_CLTARPIT;
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3447 t->be->denied_req++;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3448 done = 1;
3449 break;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3450
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3451 case ACT_REPLACE:
3452 *cur_end = term; /* restore the string terminator */
3453 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
3454 delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
3455 /* FIXME: if the user adds a newline in the replacement, the
3456 * index will not be recalculated for now, and the new line
3457 * will not be counted as a new header.
3458 */
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3459
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3460 txn->req.eoh += delta;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3461 cur_end += delta;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3462
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]3463 txn->req.sol = req->data + txn->req.som; /* should be equal to txn->sol */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3464 cur_end = (char *)http_parse_reqline(&txn->req, req->data,
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3465 HTTP_MSG_RQMETH,
3466 cur_ptr, cur_end + 1,
3467 NULL, NULL);
3468 if (unlikely(!cur_end))
3469 return -1;
Willy Tarreaua496b602006-12-17 23:15:24 +0100[diff] [blame]3470
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3471 /* we have a full request and we know that we have either a CR
3472 * or an LF at <ptr>.
3473 */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3474 txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
3475 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]3476 /* there is no point trying this regex on headers */
3477 return 1;
3478 }
3479 }
3480 *cur_end = term; /* restore the string terminator */
3481 return done;
3482}
Willy Tarreau97de6242006-12-27 17:18:38 +0100[diff] [blame]3483
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3484
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3485
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3486/*
3487 * Apply all the req filters <exp> to all headers in buffer <req> of session <t>.
3488 * 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]3489 * unparsable request. Since it can manage the switch to another backend, it
3490 * updates the per-proxy DENY stats.
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3491 */
3492int apply_filters_to_request(struct session *t, struct buffer *req, struct hdr_exp *exp)
3493{
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3494 struct http_txn *txn = &t->txn;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3495 /* iterate through the filters in the outer loop */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3496 while (exp && !(txn->flags & (TX_CLDENY|TX_CLTARPIT))) {
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3497 int ret;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3498
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3499 /*
3500 * The interleaving of transformations and verdicts
3501 * makes it difficult to decide to continue or stop
3502 * the evaluation.
3503 */
3504
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3505 if ((txn->flags & TX_CLALLOW) &&
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3506 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
3507 exp->action == ACT_TARPIT || exp->action == ACT_PASS)) {
3508 exp = exp->next;
3509 continue;
3510 }
3511
3512 /* Apply the filter to the request line. */
3513 ret = apply_filter_to_req_line(t, req, exp);
3514 if (unlikely(ret < 0))
3515 return -1;
3516
3517 if (likely(ret == 0)) {
3518 /* The filter did not match the request, it can be
3519 * iterated through all headers.
3520 */
3521 apply_filter_to_req_headers(t, req, exp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3522 }
3523 exp = exp->next;
3524 }
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3525 return 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3526}
3527
3528
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3529
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3530/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]3531 * Manage client-side cookie. It can impact performance by about 2% so it is
3532 * desirable to call it only when needed.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3533 */
3534void manage_client_side_cookies(struct session *t, struct buffer *req)
3535{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3536 struct http_txn *txn = &t->txn;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3537 char *p1, *p2, *p3, *p4;
3538 char *del_colon, *del_cookie, *colon;
3539 int app_cookies;
3540
3541 appsess *asession_temp = NULL;
3542 appsess local_asession;
3543
3544 char *cur_ptr, *cur_end, *cur_next;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]3545 int cur_idx, old_idx;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3546
Willy Tarreau2a324282006-12-05 00:05:46 +0100[diff] [blame]3547 /* Iterate through the headers.
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3548 * we start with the start line.
3549 */
Willy Tarreau83969f42007-01-22 08:55:47 +0100[diff] [blame]3550 old_idx = 0;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3551 cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3552
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3553 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3554 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]3555 int val;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3556
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3557 cur_hdr = &txn->hdr_idx.v[cur_idx];
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3558 cur_ptr = cur_next;
3559 cur_end = cur_ptr + cur_hdr->len;
3560 cur_next = cur_end + cur_hdr->cr + 1;
3561
3562 /* We have one full header between cur_ptr and cur_end, and the
3563 * next header starts at cur_next. We're only interested in
3564 * "Cookie:" headers.
3565 */
3566
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]3567 val = http_header_match2(cur_ptr, cur_end, "Cookie", 6);
3568 if (!val) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3569 old_idx = cur_idx;
3570 continue;
3571 }
3572
3573 /* Now look for cookies. Conforming to RFC2109, we have to support
3574 * attributes whose name begin with a '$', and associate them with
3575 * the right cookie, if we want to delete this cookie.
3576 * So there are 3 cases for each cookie read :
3577 * 1) it's a special attribute, beginning with a '$' : ignore it.
3578 * 2) it's a server id cookie that we *MAY* want to delete : save
3579 * some pointers on it (last semi-colon, beginning of cookie...)
3580 * 3) it's an application cookie : we *MAY* have to delete a previous
3581 * "special" cookie.
3582 * At the end of loop, if a "special" cookie remains, we may have to
3583 * remove it. If no application cookie persists in the header, we
3584 * *MUST* delete it
3585 */
3586
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]3587 colon = p1 = cur_ptr + val; /* first non-space char after 'Cookie:' */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3588
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3589 /* del_cookie == NULL => nothing to be deleted */
3590 del_colon = del_cookie = NULL;
3591 app_cookies = 0;
3592
3593 while (p1 < cur_end) {
3594 /* skip spaces and colons, but keep an eye on these ones */
3595 while (p1 < cur_end) {
3596 if (*p1 == ';' || *p1 == ',')
3597 colon = p1;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]3598 else if (!isspace((unsigned char)*p1))
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3599 break;
3600 p1++;
3601 }
3602
3603 if (p1 == cur_end)
3604 break;
3605
3606 /* p1 is at the beginning of the cookie name */
3607 p2 = p1;
3608 while (p2 < cur_end && *p2 != '=')
3609 p2++;
3610
3611 if (p2 == cur_end)
3612 break;
3613
3614 p3 = p2 + 1; /* skips the '=' sign */
3615 if (p3 == cur_end)
3616 break;
3617
3618 p4 = p3;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]3619 while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';' && *p4 != ',')
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3620 p4++;
3621
3622 /* here, we have the cookie name between p1 and p2,
3623 * and its value between p3 and p4.
3624 * we can process it :
3625 *
3626 * Cookie: NAME=VALUE;
3627 * | || || |
3628 * | || || +--> p4
3629 * | || |+-------> p3
3630 * | || +--------> p2
3631 * | |+------------> p1
3632 * | +-------------> colon
3633 * +--------------------> cur_ptr
3634 */
3635
3636 if (*p1 == '$') {
3637 /* skip this one */
3638 }
3639 else {
3640 /* first, let's see if we want to capture it */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3641 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]3642 txn->cli_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3643 (p4 - p1 >= t->fe->capture_namelen) &&
3644 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3645 int log_len = p4 - p1;
3646
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]3647 if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3648 Alert("HTTP logging : out of memory.\n");
3649 } else {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3650 if (log_len > t->fe->capture_len)
3651 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]3652 memcpy(txn->cli_cookie, p1, log_len);
3653 txn->cli_cookie[log_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3654 }
3655 }
3656
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3657 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
3658 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3659 /* Cool... it's the right one */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3660 struct server *srv = t->be->srv;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3661 char *delim;
3662
3663 /* if we're in cookie prefix mode, we'll search the delimitor so that we
3664 * have the server ID betweek p3 and delim, and the original cookie between
3665 * delim+1 and p4. Otherwise, delim==p4 :
3666 *
3667 * Cookie: NAME=SRV~VALUE;
3668 * | || || | |
3669 * | || || | +--> p4
3670 * | || || +--------> delim
3671 * | || |+-----------> p3
3672 * | || +------------> p2
3673 * | |+----------------> p1
3674 * | +-----------------> colon
3675 * +------------------------> cur_ptr
3676 */
3677
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3678 if (t->be->options & PR_O_COOK_PFX) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3679 for (delim = p3; delim < p4; delim++)
3680 if (*delim == COOKIE_DELIM)
3681 break;
3682 }
3683 else
3684 delim = p4;
3685
3686
3687 /* Here, we'll look for the first running server which supports the cookie.
3688 * This allows to share a same cookie between several servers, for example
3689 * to dedicate backup servers to specific servers only.
3690 * However, to prevent clients from sticking to cookie-less backup server
3691 * when they have incidentely learned an empty cookie, we simply ignore
3692 * empty cookies and mark them as invalid.
3693 */
3694 if (delim == p3)
3695 srv = NULL;
3696
3697 while (srv) {
Willy Tarreau92f2ab12007-02-02 22:14:47 +0100[diff] [blame]3698 if (srv->cookie && (srv->cklen == delim - p3) &&
3699 !memcmp(p3, srv->cookie, delim - p3)) {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3700 if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3701 /* we found the server and it's usable */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3702 txn->flags &= ~TX_CK_MASK;
3703 txn->flags |= TX_CK_VALID;
3704 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3705 t->srv = srv;
3706 break;
3707 } else {
3708 /* we found a server, but it's down */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3709 txn->flags &= ~TX_CK_MASK;
3710 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3711 }
3712 }
3713 srv = srv->next;
3714 }
3715
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3716 if (!srv && !(txn->flags & TX_CK_DOWN)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3717 /* no server matched this cookie */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3718 txn->flags &= ~TX_CK_MASK;
3719 txn->flags |= TX_CK_INVALID;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3720 }
3721
3722 /* depending on the cookie mode, we may have to either :
3723 * - delete the complete cookie if we're in insert+indirect mode, so that
3724 * the server never sees it ;
3725 * - remove the server id from the cookie value, and tag the cookie as an
3726 * application cookie so that it does not get accidentely removed later,
3727 * if we're in cookie prefix mode
3728 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3729 if ((t->be->options & PR_O_COOK_PFX) && (delim != p4)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3730 int delta; /* negative */
3731
3732 delta = buffer_replace2(req, p3, delim + 1, NULL, 0);
3733 p4 += delta;
3734 cur_end += delta;
3735 cur_next += delta;
3736 cur_hdr->len += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3737 txn->req.eoh += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3738
3739 del_cookie = del_colon = NULL;
3740 app_cookies++; /* protect the header from deletion */
3741 }
3742 else if (del_cookie == NULL &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3743 (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]3744 del_cookie = p1;
3745 del_colon = colon;
3746 }
3747 } else {
3748 /* now we know that we must keep this cookie since it's
3749 * not ours. But if we wanted to delete our cookie
3750 * earlier, we cannot remove the complete header, but we
3751 * can remove the previous block itself.
3752 */
3753 app_cookies++;
3754
3755 if (del_cookie != NULL) {
3756 int delta; /* negative */
3757
3758 delta = buffer_replace2(req, del_cookie, p1, NULL, 0);
3759 p4 += delta;
3760 cur_end += delta;
3761 cur_next += delta;
3762 cur_hdr->len += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3763 txn->req.eoh += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3764 del_cookie = del_colon = NULL;
3765 }
3766 }
3767
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3768 if ((t->be->appsession_name != NULL) &&
3769 (memcmp(p1, t->be->appsession_name, p2 - p1) == 0)) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3770 /* first, let's see if the cookie is our appcookie*/
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]3771
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3772 /* Cool... it's the right one */
3773
3774 asession_temp = &local_asession;
3775
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]3776 if ((asession_temp->sessid = pool_alloc2(apools.sessid)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3777 Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
3778 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
3779 return;
3780 }
3781
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3782 memcpy(asession_temp->sessid, p3, t->be->appsession_len);
3783 asession_temp->sessid[t->be->appsession_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3784 asession_temp->serverid = NULL;
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]3785
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3786 /* only do insert, if lookup fails */
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]3787 asession_temp = appsession_hash_lookup(&(t->be->htbl_proxy), asession_temp->sessid);
3788 if (asession_temp == NULL) {
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]3789 if ((asession_temp = pool_alloc2(pool2_appsess)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3790 /* free previously allocated memory */
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]3791 pool_free2(apools.sessid, local_asession.sessid);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3792 Alert("Not enough memory process_cli():asession:calloc().\n");
3793 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession:calloc().\n");
3794 return;
3795 }
3796
3797 asession_temp->sessid = local_asession.sessid;
3798 asession_temp->serverid = local_asession.serverid;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]3799 asession_temp->request_count = 0;
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]3800 appsession_hash_insert(&(t->be->htbl_proxy), asession_temp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3801 } else {
3802 /* free previously allocated memory */
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]3803 pool_free2(apools.sessid, local_asession.sessid);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3804 }
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3805 if (asession_temp->serverid == NULL) {
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]3806 /* TODO redispatch request */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3807 Alert("Found Application Session without matching server.\n");
3808 } else {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3809 struct server *srv = t->be->srv;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3810 while (srv) {
3811 if (strcmp(srv->id, asession_temp->serverid) == 0) {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]3812 if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3813 /* we found the server and it's usable */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3814 txn->flags &= ~TX_CK_MASK;
3815 txn->flags |= TX_CK_VALID;
3816 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3817 t->srv = srv;
3818 break;
3819 } else {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3820 txn->flags &= ~TX_CK_MASK;
3821 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3822 }
3823 }
3824 srv = srv->next;
3825 }/* end while(srv) */
3826 }/* end else if server == NULL */
3827
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200[diff] [blame]3828 asession_temp->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]3829 asession_temp->request_count++;
3830#if defined(DEBUG_HASH)
3831 Alert("manage_client_side_cookies\n");
3832 appsession_hash_dump(&(t->be->htbl_proxy));
3833#endif
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3834 }/* end if ((t->proxy->appsession_name != NULL) ... */
3835 }
3836
3837 /* we'll have to look for another cookie ... */
3838 p1 = p4;
3839 } /* while (p1 < cur_end) */
3840
3841 /* There's no more cookie on this line.
3842 * We may have marked the last one(s) for deletion.
3843 * We must do this now in two ways :
3844 * - if there is no app cookie, we simply delete the header ;
3845 * - if there are app cookies, we must delete the end of the
3846 * string properly, including the colon/semi-colon before
3847 * the cookie name.
3848 */
3849 if (del_cookie != NULL) {
3850 int delta;
3851 if (app_cookies) {
3852 delta = buffer_replace2(req, del_colon, cur_end, NULL, 0);
3853 cur_end = del_colon;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3854 cur_hdr->len += delta;
3855 } else {
3856 delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3857
3858 /* FIXME: this should be a separate function */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3859 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
3860 txn->hdr_idx.used--;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3861 cur_hdr->len = 0;
3862 }
Willy Tarreau45e73e32006-12-17 00:05:15 +0100[diff] [blame]3863 cur_next += delta;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]3864 txn->req.eoh += delta;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]3865 }
3866
3867 /* keep the link from this header to next one */
3868 old_idx = cur_idx;
3869 } /* end of cookie processing on this header */
3870}
3871
3872
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3873/* Iterate the same filter through all response headers contained in <rtr>.
3874 * Returns 1 if this filter can be stopped upon return, otherwise 0.
3875 */
3876int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
3877{
3878 char term;
3879 char *cur_ptr, *cur_end, *cur_next;
3880 int cur_idx, old_idx, last_hdr;
3881 struct http_txn *txn = &t->txn;
3882 struct hdr_idx_elem *cur_hdr;
3883 int len, delta;
3884
3885 last_hdr = 0;
3886
3887 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
3888 old_idx = 0;
3889
3890 while (!last_hdr) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3891 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3892 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3893 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3894 (exp->action == ACT_ALLOW ||
3895 exp->action == ACT_DENY))
3896 return 0;
3897
3898 cur_idx = txn->hdr_idx.v[old_idx].next;
3899 if (!cur_idx)
3900 break;
3901
3902 cur_hdr = &txn->hdr_idx.v[cur_idx];
3903 cur_ptr = cur_next;
3904 cur_end = cur_ptr + cur_hdr->len;
3905 cur_next = cur_end + cur_hdr->cr + 1;
3906
3907 /* Now we have one header between cur_ptr and cur_end,
3908 * and the next header starts at cur_next.
3909 */
3910
3911 /* The annoying part is that pattern matching needs
3912 * that we modify the contents to null-terminate all
3913 * strings before testing them.
3914 */
3915
3916 term = *cur_end;
3917 *cur_end = '\0';
3918
3919 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
3920 switch (exp->action) {
3921 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3922 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3923 last_hdr = 1;
3924 break;
3925
3926 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3927 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3928 last_hdr = 1;
3929 break;
3930
3931 case ACT_REPLACE:
3932 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
3933 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
3934 /* FIXME: if the user adds a newline in the replacement, the
3935 * index will not be recalculated for now, and the new line
3936 * will not be counted as a new header.
3937 */
3938
3939 cur_end += delta;
3940 cur_next += delta;
3941 cur_hdr->len += delta;
3942 txn->rsp.eoh += delta;
3943 break;
3944
3945 case ACT_REMOVE:
3946 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
3947 cur_next += delta;
3948
3949 /* FIXME: this should be a separate function */
3950 txn->rsp.eoh += delta;
3951 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
3952 txn->hdr_idx.used--;
3953 cur_hdr->len = 0;
3954 cur_end = NULL; /* null-term has been rewritten */
3955 break;
3956
3957 }
3958 }
3959 if (cur_end)
3960 *cur_end = term; /* restore the string terminator */
3961
3962 /* keep the link from this header to next one in case of later
3963 * removal of next header.
3964 */
3965 old_idx = cur_idx;
3966 }
3967 return 0;
3968}
3969
3970
3971/* Apply the filter to the status line in the response buffer <rtr>.
3972 * Returns 0 if nothing has been done, 1 if the filter has been applied,
3973 * or -1 if a replacement resulted in an invalid status line.
3974 */
3975int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
3976{
3977 char term;
3978 char *cur_ptr, *cur_end;
3979 int done;
3980 struct http_txn *txn = &t->txn;
3981 int len, delta;
3982
3983
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3984 if (unlikely(txn->flags & TX_SVDENY))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3985 return 1;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]3986 else if (unlikely(txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3987 (exp->action == ACT_ALLOW ||
3988 exp->action == ACT_DENY))
3989 return 0;
3990 else if (exp->action == ACT_REMOVE)
3991 return 0;
3992
3993 done = 0;
3994
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]3995 cur_ptr = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]3996 cur_end = cur_ptr + txn->rsp.sl.rq.l;
3997
3998 /* Now we have the status line between cur_ptr and cur_end */
3999
4000 /* The annoying part is that pattern matching needs
4001 * that we modify the contents to null-terminate all
4002 * strings before testing them.
4003 */
4004
4005 term = *cur_end;
4006 *cur_end = '\0';
4007
4008 if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
4009 switch (exp->action) {
4010 case ACT_ALLOW:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4011 txn->flags |= TX_SVALLOW;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4012 done = 1;
4013 break;
4014
4015 case ACT_DENY:
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4016 txn->flags |= TX_SVDENY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4017 done = 1;
4018 break;
4019
4020 case ACT_REPLACE:
4021 *cur_end = term; /* restore the string terminator */
4022 len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
4023 delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
4024 /* FIXME: if the user adds a newline in the replacement, the
4025 * index will not be recalculated for now, and the new line
4026 * will not be counted as a new header.
4027 */
4028
4029 txn->rsp.eoh += delta;
4030 cur_end += delta;
4031
Willy Tarreau9cdde232007-05-02 20:58:19 +0200[diff] [blame]4032 txn->rsp.sol = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4033 cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
Willy Tarreau02785762007-04-03 14:45:44 +0200[diff] [blame]4034 HTTP_MSG_RPVER,
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4035 cur_ptr, cur_end + 1,
4036 NULL, NULL);
4037 if (unlikely(!cur_end))
4038 return -1;
4039
4040 /* we have a full respnse and we know that we have either a CR
4041 * or an LF at <ptr>.
4042 */
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4043 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]4044 hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.rq.l, *cur_end == '\r');
4045 /* there is no point trying this regex on headers */
4046 return 1;
4047 }
4048 }
4049 *cur_end = term; /* restore the string terminator */
4050 return done;
4051}
4052
4053
4054
4055/*
4056 * Apply all the resp filters <exp> to all headers in buffer <rtr> of session <t>.
4057 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
4058 * unparsable response.
4059 */
4060int apply_filters_to_response(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
4061{
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4062 struct http_txn *txn = &t->txn;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4063 /* iterate through the filters in the outer loop */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4064 while (exp && !(txn->flags & TX_SVDENY)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4065 int ret;
4066
4067 /*
4068 * The interleaving of transformations and verdicts
4069 * makes it difficult to decide to continue or stop
4070 * the evaluation.
4071 */
4072
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4073 if ((txn->flags & TX_SVALLOW) &&
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4074 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
4075 exp->action == ACT_PASS)) {
4076 exp = exp->next;
4077 continue;
4078 }
4079
4080 /* Apply the filter to the status line. */
4081 ret = apply_filter_to_sts_line(t, rtr, exp);
4082 if (unlikely(ret < 0))
4083 return -1;
4084
4085 if (likely(ret == 0)) {
4086 /* The filter did not match the response, it can be
4087 * iterated through all headers.
4088 */
4089 apply_filter_to_resp_headers(t, rtr, exp);
4090 }
4091 exp = exp->next;
4092 }
4093 return 0;
4094}
4095
4096
4097
4098/*
Willy Tarreau396d2c62007-11-04 19:30:00 +0100[diff] [blame]4099 * Manage server-side cookies. It can impact performance by about 2% so it is
4100 * desirable to call it only when needed.
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4101 */
4102void manage_server_side_cookies(struct session *t, struct buffer *rtr)
4103{
4104 struct http_txn *txn = &t->txn;
4105 char *p1, *p2, *p3, *p4;
4106
4107 appsess *asession_temp = NULL;
4108 appsess local_asession;
4109
4110 char *cur_ptr, *cur_end, *cur_next;
4111 int cur_idx, old_idx, delta;
4112
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4113 /* Iterate through the headers.
4114 * we start with the start line.
4115 */
4116 old_idx = 0;
4117 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
4118
4119 while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
4120 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4121 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4122
4123 cur_hdr = &txn->hdr_idx.v[cur_idx];
4124 cur_ptr = cur_next;
4125 cur_end = cur_ptr + cur_hdr->len;
4126 cur_next = cur_end + cur_hdr->cr + 1;
4127
4128 /* We have one full header between cur_ptr and cur_end, and the
4129 * next header starts at cur_next. We're only interested in
4130 * "Cookie:" headers.
4131 */
4132
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4133 val = http_header_match2(cur_ptr, cur_end, "Set-Cookie", 10);
4134 if (!val) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4135 old_idx = cur_idx;
4136 continue;
4137 }
4138
4139 /* OK, right now we know we have a set-cookie at cur_ptr */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4140 txn->flags |= TX_SCK_ANY;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4141
4142
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4143 /* maybe we only wanted to see if there was a set-cookie. Note that
4144 * the cookie capture is declared in the fronend.
4145 */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4146 if (t->be->cookie_name == NULL &&
4147 t->be->appsession_name == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4148 t->fe->capture_name == NULL)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4149 return;
4150
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4151 p1 = cur_ptr + val; /* first non-space char after 'Set-Cookie:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4152
4153 while (p1 < cur_end) { /* in fact, we'll break after the first cookie */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4154 if (p1 == cur_end || *p1 == ';') /* end of cookie */
4155 break;
4156
4157 /* p1 is at the beginning of the cookie name */
4158 p2 = p1;
4159
4160 while (p2 < cur_end && *p2 != '=' && *p2 != ';')
4161 p2++;
4162
4163 if (p2 == cur_end || *p2 == ';') /* next cookie */
4164 break;
4165
4166 p3 = p2 + 1; /* skip the '=' sign */
4167 if (p3 == cur_end)
4168 break;
4169
4170 p4 = p3;
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]4171 while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';')
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4172 p4++;
4173
4174 /* here, we have the cookie name between p1 and p2,
4175 * and its value between p3 and p4.
4176 * we can process it.
4177 */
4178
4179 /* first, let's see if we want to capture it */
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4180 if (t->fe->capture_name != NULL &&
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4181 txn->srv_cookie == NULL &&
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4182 (p4 - p1 >= t->fe->capture_namelen) &&
4183 memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4184 int log_len = p4 - p1;
4185
Willy Tarreau086b3b42007-05-13 21:45:51 +0200[diff] [blame]4186 if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4187 Alert("HTTP logging : out of memory.\n");
4188 }
4189
Willy Tarreaufd39dda2008-10-17 12:01:58 +0200[diff] [blame]4190 if (log_len > t->fe->capture_len)
4191 log_len = t->fe->capture_len;
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4192 memcpy(txn->srv_cookie, p1, log_len);
4193 txn->srv_cookie[log_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4194 }
4195
4196 /* now check if we need to process it for persistence */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4197 if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
4198 (memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4199 /* Cool... it's the right one */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4200 txn->flags |= TX_SCK_SEEN;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4201
4202 /* If the cookie is in insert mode on a known server, we'll delete
4203 * this occurrence because we'll insert another one later.
4204 * We'll delete it too if the "indirect" option is set and we're in
4205 * a direct access. */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4206 if (((t->srv) && (t->be->options & PR_O_COOK_INS)) ||
4207 ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4208 /* this header must be deleted */
4209 delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
4210 txn->hdr_idx.v[old_idx].next = cur_hdr->next;
4211 txn->hdr_idx.used--;
4212 cur_hdr->len = 0;
4213 cur_next += delta;
4214 txn->rsp.eoh += delta;
4215
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4216 txn->flags |= TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4217 }
4218 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4219 (t->be->options & PR_O_COOK_RW)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4220 /* replace bytes p3->p4 with the cookie name associated
4221 * with this server since we know it.
4222 */
4223 delta = buffer_replace2(rtr, p3, p4, t->srv->cookie, t->srv->cklen);
4224 cur_hdr->len += delta;
4225 cur_next += delta;
4226 txn->rsp.eoh += delta;
4227
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4228 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4229 }
4230 else if ((t->srv) && (t->srv->cookie) &&
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4231 (t->be->options & PR_O_COOK_PFX)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4232 /* insert the cookie name associated with this server
4233 * before existing cookie, and insert a delimitor between them..
4234 */
4235 delta = buffer_replace2(rtr, p3, p3, t->srv->cookie, t->srv->cklen + 1);
4236 cur_hdr->len += delta;
4237 cur_next += delta;
4238 txn->rsp.eoh += delta;
4239
4240 p3[t->srv->cklen] = COOKIE_DELIM;
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4241 txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4242 }
4243 }
4244 /* next, let's see if the cookie is our appcookie */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4245 else if ((t->be->appsession_name != NULL) &&
4246 (memcmp(p1, t->be->appsession_name, p2 - p1) == 0)) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4247
4248 /* Cool... it's the right one */
4249
4250 size_t server_id_len = strlen(t->srv->id) + 1;
4251 asession_temp = &local_asession;
4252
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4253 if ((asession_temp->sessid = pool_alloc2(apools.sessid)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4254 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
4255 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
4256 return;
4257 }
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4258 memcpy(asession_temp->sessid, p3, t->be->appsession_len);
4259 asession_temp->sessid[t->be->appsession_len] = 0;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4260 asession_temp->serverid = NULL;
4261
4262 /* only do insert, if lookup fails */
Ryan Warnick6d0b1fa2008-02-17 11:24:35 +0100[diff] [blame]4263 asession_temp = appsession_hash_lookup(&(t->be->htbl_proxy), asession_temp->sessid);
4264 if (asession_temp == NULL) {
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4265 if ((asession_temp = pool_alloc2(pool2_appsess)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4266 Alert("Not enough Memory process_srv():asession:calloc().\n");
4267 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
4268 return;
4269 }
4270 asession_temp->sessid = local_asession.sessid;
4271 asession_temp->serverid = local_asession.serverid;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]4272 asession_temp->request_count = 0;
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4273 appsession_hash_insert(&(t->be->htbl_proxy), asession_temp);
4274 } else {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4275 /* free wasted memory */
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4276 pool_free2(apools.sessid, local_asession.sessid);
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4277 }
4278
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4279 if (asession_temp->serverid == NULL) {
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4280 if ((asession_temp->serverid = pool_alloc2(apools.serverid)) == NULL) {
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4281 Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
4282 send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
4283 return;
4284 }
4285 asession_temp->serverid[0] = '\0';
4286 }
4287
4288 if (asession_temp->serverid[0] == '\0')
4289 memcpy(asession_temp->serverid, t->srv->id, server_id_len);
4290
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200[diff] [blame]4291 asession_temp->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]4292 asession_temp->request_count++;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4293#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]4294 Alert("manage_server_side_cookies\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4295 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4296#endif
4297 }/* end if ((t->proxy->appsession_name != NULL) ... */
4298 break; /* we don't want to loop again since there cannot be another cookie on the same line */
4299 } /* we're now at the end of the cookie value */
4300
4301 /* keep the link from this header to next one */
4302 old_idx = cur_idx;
4303 } /* end of cookie processing on this header */
4304}
4305
4306
4307
4308/*
4309 * Check if response is cacheable or not. Updates t->flags.
4310 */
4311void check_response_for_cacheability(struct session *t, struct buffer *rtr)
4312{
4313 struct http_txn *txn = &t->txn;
4314 char *p1, *p2;
4315
4316 char *cur_ptr, *cur_end, *cur_next;
4317 int cur_idx;
4318
Willy Tarreau5df51872007-11-25 16:20:08 +0100[diff] [blame]4319 if (!(txn->flags & TX_CACHEABLE))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4320 return;
4321
4322 /* Iterate through the headers.
4323 * we start with the start line.
4324 */
4325 cur_idx = 0;
4326 cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
4327
4328 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
4329 struct hdr_idx_elem *cur_hdr;
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4330 int val;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4331
4332 cur_hdr = &txn->hdr_idx.v[cur_idx];
4333 cur_ptr = cur_next;
4334 cur_end = cur_ptr + cur_hdr->len;
4335 cur_next = cur_end + cur_hdr->cr + 1;
4336
4337 /* We have one full header between cur_ptr and cur_end, and the
4338 * next header starts at cur_next. We're only interested in
4339 * "Cookie:" headers.
4340 */
4341
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4342 val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
4343 if (val) {
4344 if ((cur_end - (cur_ptr + val) >= 8) &&
4345 strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
4346 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4347 return;
4348 }
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4349 }
4350
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4351 val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
4352 if (!val)
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4353 continue;
4354
4355 /* OK, right now we know we have a cache-control header at cur_ptr */
4356
Willy Tarreauaa9dce32007-03-18 23:50:16 +0100[diff] [blame]4357 p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4358
4359 if (p1 >= cur_end) /* no more info */
4360 continue;
4361
4362 /* p1 is at the beginning of the value */
4363 p2 = p1;
4364
Willy Tarreau8f8e6452007-06-17 21:51:38 +0200[diff] [blame]4365 while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4366 p2++;
4367
4368 /* we have a complete value between p1 and p2 */
4369 if (p2 < cur_end && *p2 == '=') {
4370 /* we have something of the form no-cache="set-cookie" */
4371 if ((cur_end - p1 >= 21) &&
4372 strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
4373 && (p1[20] == '"' || p1[20] == ','))
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4374 txn->flags &= ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4375 continue;
4376 }
4377
4378 /* OK, so we know that either p2 points to the end of string or to a comma */
4379 if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
4380 ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
4381 ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
4382 ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4383 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4384 return;
4385 }
4386
4387 if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4388 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Willy Tarreaua15645d2007-03-18 16:22:39 +0100[diff] [blame]4389 continue;
4390 }
4391 }
4392}
4393
4394
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4395/*
4396 * Try to retrieve a known appsession in the URI, then the associated server.
4397 * If the server is found, it's assigned to the session.
4398 */
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4399void get_srv_from_appsession(struct session *t, const char *begin, int len)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4400{
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4401 struct http_txn *txn = &t->txn;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4402 appsess *asession_temp = NULL;
4403 appsess local_asession;
4404 char *request_line;
4405
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4406 if (t->be->appsession_name == NULL ||
Willy Tarreaub326fcc2007-03-03 13:54:32 +0100[diff] [blame]4407 (t->txn.meth != HTTP_METH_GET && t->txn.meth != HTTP_METH_POST) ||
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4408 (request_line = memchr(begin, ';', len)) == NULL ||
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4409 ((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]4410 return;
4411
4412 /* skip ';' */
4413 request_line++;
4414
4415 /* look if we have a jsessionid */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4416 if (strncasecmp(request_line, t->be->appsession_name, t->be->appsession_name_len) != 0)
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4417 return;
4418
4419 /* skip jsessionid= */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4420 request_line += t->be->appsession_name_len + 1;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4421
4422 /* First try if we already have an appsession */
4423 asession_temp = &local_asession;
4424
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4425 if ((asession_temp->sessid = pool_alloc2(apools.sessid)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4426 Alert("Not enough memory process_cli():asession_temp->sessid:calloc().\n");
4427 send_log(t->be, LOG_ALERT, "Not enough Memory process_cli():asession_temp->sessid:calloc().\n");
4428 return;
4429 }
4430
4431 /* Copy the sessionid */
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4432 memcpy(asession_temp->sessid, request_line, t->be->appsession_len);
4433 asession_temp->sessid[t->be->appsession_len] = 0;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4434 asession_temp->serverid = NULL;
4435
4436 /* only do insert, if lookup fails */
Ryan Warnick6d0b1fa2008-02-17 11:24:35 +0100[diff] [blame]4437 asession_temp = appsession_hash_lookup(&(t->be->htbl_proxy), asession_temp->sessid);
4438 if (asession_temp == NULL) {
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4439 if ((asession_temp = pool_alloc2(pool2_appsess)) == NULL) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4440 /* free previously allocated memory */
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4441 pool_free2(apools.sessid, local_asession.sessid);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4442 Alert("Not enough memory process_cli():asession:calloc().\n");
4443 send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession:calloc().\n");
4444 return;
4445 }
4446 asession_temp->sessid = local_asession.sessid;
4447 asession_temp->serverid = local_asession.serverid;
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]4448 asession_temp->request_count=0;
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4449 appsession_hash_insert(&(t->be->htbl_proxy), asession_temp);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4450 }
4451 else {
4452 /* free previously allocated memory */
Willy Tarreau63963c62007-05-13 21:29:55 +0200[diff] [blame]4453 pool_free2(apools.sessid, local_asession.sessid);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4454 }
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4455
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200[diff] [blame]4456 asession_temp->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4457 asession_temp->request_count++;
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4458
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4459#if defined(DEBUG_HASH)
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]4460 Alert("get_srv_from_appsession\n");
Willy Tarreau51041c72007-09-09 21:56:53 +0200[diff] [blame]4461 appsession_hash_dump(&(t->be->htbl_proxy));
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4462#endif
4463 if (asession_temp->serverid == NULL) {
Aleksandar Lazic697bbb02008-08-13 19:57:02 +0200[diff] [blame]4464 /* TODO redispatch request */
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4465 Alert("Found Application Session without matching server.\n");
4466 } else {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4467 struct server *srv = t->be->srv;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4468 while (srv) {
4469 if (strcmp(srv->id, asession_temp->serverid) == 0) {
Willy Tarreaue2e27a52007-04-01 00:01:37 +0200[diff] [blame]4470 if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4471 /* we found the server and it's usable */
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4472 txn->flags &= ~TX_CK_MASK;
4473 txn->flags |= TX_CK_VALID;
4474 t->flags |= SN_DIRECT | SN_ASSIGNED;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4475 t->srv = srv;
4476 break;
4477 } else {
Willy Tarreau3d300592007-03-18 18:34:41 +0100[diff] [blame]4478 txn->flags &= ~TX_CK_MASK;
4479 txn->flags |= TX_CK_DOWN;
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4480 }
4481 }
4482 srv = srv->next;
4483 }
4484 }
4485}
4486
4487
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4488/*
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]4489 * In a GET or HEAD request, check if the requested URI matches the stats uri
4490 * for the current backend, and if an authorization has been passed and is valid.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4491 *
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]4492 * 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]4493 * t->be->uri_auth field is valid. An HTTP/401 response may be sent, or
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]4494 * produce_content() can be called to start sending data.
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4495 *
4496 * Returns 1 if the session's state changes, otherwise 0.
4497 */
4498int stats_check_uri_auth(struct session *t, struct proxy *backend)
4499{
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4500 struct http_txn *txn = &t->txn;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4501 struct uri_auth *uri_auth = backend->uri_auth;
4502 struct user_auth *user;
4503 int authenticated, cur_idx;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4504 char *h;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4505
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4506 memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats));
4507
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4508 /* check URI size */
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4509 if (uri_auth->uri_len > txn->req.sl.rq.u_l)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4510 return 0;
4511
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4512 h = t->req->data + txn->req.sl.rq.u;
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100[diff] [blame]4513
Willy Tarreau0214c3a2007-01-07 13:47:30 +0100[diff] [blame]4514 /* the URI is in h */
4515 if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4516 return 0;
4517
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]4518 h += uri_auth->uri_len;
4519 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 3) {
4520 if (memcmp(h, ";up", 3) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4521 t->data_ctx.stats.flags |= STAT_HIDE_DOWN;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]4522 break;
4523 }
4524 h++;
4525 }
4526
4527 if (uri_auth->refresh) {
4528 h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
4529 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 10) {
4530 if (memcmp(h, ";norefresh", 10) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4531 t->data_ctx.stats.flags |= STAT_NO_REFRESH;
Willy Tarreaue7150cd2007-07-25 14:43:32 +0200[diff] [blame]4532 break;
4533 }
4534 h++;
4535 }
4536 }
4537
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]4538 h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
4539 while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 4) {
4540 if (memcmp(h, ";csv", 4) == 0) {
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4541 t->data_ctx.stats.flags |= STAT_FMT_CSV;
Willy Tarreau55bb8452007-10-17 18:44:57 +0200[diff] [blame]4542 break;
4543 }
4544 h++;
4545 }
4546
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4547 t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
4548
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4549 /* we are in front of a interceptable URI. Let's check
4550 * if there's an authentication and if it's valid.
4551 */
4552 user = uri_auth->users;
4553 if (!user) {
4554 /* no user auth required, it's OK */
4555 authenticated = 1;
4556 } else {
4557 authenticated = 0;
4558
4559 /* a user list is defined, we have to check.
4560 * skip 21 chars for "Authorization: Basic ".
4561 */
4562
4563 /* FIXME: this should move to an earlier place */
4564 cur_idx = 0;
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4565 h = t->req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
4566 while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
4567 int len = txn->hdr_idx.v[cur_idx].len;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4568 if (len > 14 &&
4569 !strncasecmp("Authorization:", h, 14)) {
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4570 txn->auth_hdr.str = h;
4571 txn->auth_hdr.len = len;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4572 break;
4573 }
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4574 h += len + txn->hdr_idx.v[cur_idx].cr + 1;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4575 }
4576
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4577 if (txn->auth_hdr.len < 21 ||
4578 memcmp(txn->auth_hdr.str + 14, " Basic ", 7))
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4579 user = NULL;
4580
4581 while (user) {
Willy Tarreau4dbc4a22007-03-03 16:23:22 +0100[diff] [blame]4582 if ((txn->auth_hdr.len == user->user_len + 14 + 7)
4583 && !memcmp(txn->auth_hdr.str + 14 + 7,
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4584 user->user_pwd, user->user_len)) {
4585 authenticated = 1;
4586 break;
4587 }
4588 user = user->next;
4589 }
4590 }
4591
4592 if (!authenticated) {
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]4593 struct chunk msg;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4594
4595 /* no need to go further */
Willy Tarreau0f772532006-12-23 20:51:41 +0100[diff] [blame]4596 msg.str = trash;
4597 msg.len = sprintf(trash, HTTP_401_fmt, uri_auth->auth_realm);
Willy Tarreau3bac9ff2007-03-18 17:31:28 +0100[diff] [blame]4598 txn->status = 401;
Willy Tarreaudded32d2008-11-30 19:48:07 +0100[diff] [blame]4599 stream_int_retnclose(t->req->prod, &msg);
Willy Tarreau2df28e82008-08-17 15:20:19 +0200[diff] [blame]4600 t->req->analysers = 0;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4601 if (!(t->flags & SN_ERR_MASK))
4602 t->flags |= SN_ERR_PRXCOND;
4603 if (!(t->flags & SN_FINST_MASK))
4604 t->flags |= SN_FINST_R;
4605 return 1;
4606 }
4607
Willy Tarreau39f7e6d2008-03-17 21:38:24 +0100[diff] [blame]4608 /* The request is valid, the user is authenticated. Let's start sending
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4609 * data.
4610 */
Willy Tarreauefb453c2008-10-26 20:49:47 +0100[diff] [blame]4611 buffer_write_dis(t->req);
Willy Tarreau72b179a2008-08-28 16:01:32 +0200[diff] [blame]4612 buffer_shutw_now(t->req);
4613 buffer_shutr_now(t->rep);
Willy Tarreau70089872008-06-13 21:12:51 +0200[diff] [blame]4614 t->logs.tv_request = now;
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4615 t->data_source = DATA_SRC_STATS;
4616 t->data_state = DATA_ST_INIT;
Willy Tarreau91e99932008-06-30 07:51:00 +0200[diff] [blame]4617 t->task->nice = -32; /* small boost for HTTP statistics */
Willy Tarreau01bf8672008-12-07 18:03:29 +0100[diff] [blame]4618 buffer_install_hijacker(t, t->rep, produce_content);
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4619 return 1;
4620}
4621
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4622/*
4623 * Capture a bad request or response and archive it in the proxy's structure.
4624 */
4625void http_capture_bad_message(struct error_snapshot *es, struct session *s,
4626 struct buffer *buf, struct http_msg *msg,
4627 struct proxy *other_end)
4628{
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]4629 es->len = buf->r - (buf->data + msg->som);
4630 memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4631 if (msg->err_pos >= 0)
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]4632 es->pos = msg->err_pos - msg->som;
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4633 else
Willy Tarreau2df8d712009-05-01 11:33:17 +0200[diff] [blame]4634 es->pos = buf->lr - (buf->data + msg->som);
Willy Tarreau4076a152009-04-02 15:18:36 +0200[diff] [blame]4635 es->when = date; // user-visible date
4636 es->sid = s->uniq_id;
4637 es->srv = s->srv;
4638 es->oe = other_end;
4639 es->src = s->cli_addr;
4640}
Willy Tarreaub2513902006-12-17 14:52:38 +0100[diff] [blame]4641
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]4642/*
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4643 * Print a debug line with a header
4644 */
4645void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
4646{
4647 int len, max;
4648 len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
Willy Tarreau3a16b2c2008-08-28 08:54:27 +0200[diff] [blame]4649 dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]4650 max = end - start;
4651 UBOUND(max, sizeof(trash) - len - 1);
4652 len += strlcpy2(trash + len, start, max + 1);
4653 trash[len++] = '\n';
4654 write(1, trash, len);
4655}
4656
4657
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4658/************************************************************************/
4659/* The code below is dedicated to ACL parsing and matching */
4660/************************************************************************/
4661
4662
4663
4664
4665/* 1. Check on METHOD
4666 * We use the pre-parsed method if it is known, and store its number as an
4667 * integer. If it is unknown, we use the pointer and the length.
4668 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4669static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4670{
4671 int len, meth;
4672
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4673 len = strlen(*text);
4674 meth = find_http_meth(*text, len);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4675
4676 pattern->val.i = meth;
4677 if (meth == HTTP_METH_OTHER) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4678 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4679 if (!pattern->ptr.str)
4680 return 0;
4681 pattern->len = len;
4682 }
4683 return 1;
4684}
4685
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4686static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4687acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
4688 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4689{
4690 int meth;
4691 struct http_txn *txn = l7;
4692
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4693 if (!txn)
4694 return 0;
4695
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4696 if (txn->req.msg_state != HTTP_MSG_BODY)
4697 return 0;
4698
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4699 meth = txn->meth;
4700 test->i = meth;
4701 if (meth == HTTP_METH_OTHER) {
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4702 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4703 /* ensure the indexes are not affected */
4704 return 0;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4705 test->len = txn->req.sl.rq.m_l;
4706 test->ptr = txn->req.sol;
4707 }
4708 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
4709 return 1;
4710}
4711
4712static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
4713{
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]4714 int icase;
4715
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4716 if (test->i != pattern->val.i)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4717 return ACL_PAT_FAIL;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4718
4719 if (test->i != HTTP_METH_OTHER)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4720 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4721
4722 /* Other method, we must compare the strings */
4723 if (pattern->len != test->len)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4724 return ACL_PAT_FAIL;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]4725
4726 icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
4727 if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
4728 (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]4729 return ACL_PAT_FAIL;
4730 return ACL_PAT_PASS;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4731}
4732
4733/* 2. Check on Request/Status Version
4734 * We simply compare strings here.
4735 */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4736static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4737{
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4738 pattern->ptr.str = strdup(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4739 if (!pattern->ptr.str)
4740 return 0;
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]4741 pattern->len = strlen(*text);
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4742 return 1;
4743}
4744
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4745static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4746acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
4747 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4748{
4749 struct http_txn *txn = l7;
4750 char *ptr;
4751 int len;
4752
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4753 if (!txn)
4754 return 0;
4755
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4756 if (txn->req.msg_state != HTTP_MSG_BODY)
4757 return 0;
4758
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4759 len = txn->req.sl.rq.v_l;
4760 ptr = txn->req.sol + txn->req.sl.rq.v - txn->req.som;
4761
4762 while ((len-- > 0) && (*ptr++ != '/'));
4763 if (len <= 0)
4764 return 0;
4765
4766 test->ptr = ptr;
4767 test->len = len;
4768
4769 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
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_stver(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 struct http_txn *txn = l7;
4778 char *ptr;
4779 int len;
4780
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4781 if (!txn)
4782 return 0;
4783
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4784 if (txn->rsp.msg_state != HTTP_MSG_BODY)
4785 return 0;
4786
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4787 len = txn->rsp.sl.st.v_l;
4788 ptr = txn->rsp.sol;
4789
4790 while ((len-- > 0) && (*ptr++ != '/'));
4791 if (len <= 0)
4792 return 0;
4793
4794 test->ptr = ptr;
4795 test->len = len;
4796
4797 test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
4798 return 1;
4799}
4800
4801/* 3. Check on Status Code. We manipulate integers here. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4802static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4803acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
4804 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4805{
4806 struct http_txn *txn = l7;
4807 char *ptr;
4808 int len;
4809
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4810 if (!txn)
4811 return 0;
4812
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4813 if (txn->rsp.msg_state != HTTP_MSG_BODY)
4814 return 0;
4815
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4816 len = txn->rsp.sl.st.c_l;
4817 ptr = txn->rsp.sol + txn->rsp.sl.st.c - txn->rsp.som;
4818
4819 test->i = __strl2ui(ptr, len);
4820 test->flags = ACL_TEST_F_VOL_1ST;
4821 return 1;
4822}
4823
4824/* 4. Check on URL/URI. A pointer to the URI is stored. */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]4825static int
Willy Tarreau97be1452007-06-10 11:47:14 +0200[diff] [blame]4826acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
4827 struct acl_expr *expr, struct acl_test *test)
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4828{
4829 struct http_txn *txn = l7;
4830
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4831 if (!txn)
4832 return 0;
4833
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4834 if (txn->req.msg_state != HTTP_MSG_BODY)
4835 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4836
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4837 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4838 /* ensure the indexes are not affected */
4839 return 0;
4840
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4841 test->len = txn->req.sl.rq.u_l;
4842 test->ptr = txn->req.sol + txn->req.sl.rq.u;
4843
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]4844 /* we do not need to set READ_ONLY because the data is in a buffer */
4845 test->flags = ACL_TEST_F_VOL_1ST;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4846 return 1;
4847}
4848
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4849static int
4850acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
4851 struct acl_expr *expr, struct acl_test *test)
4852{
4853 struct http_txn *txn = l7;
4854
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4855 if (!txn)
4856 return 0;
4857
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4858 if (txn->req.msg_state != HTTP_MSG_BODY)
4859 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4860
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4861 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4862 /* ensure the indexes are not affected */
4863 return 0;
4864
4865 /* Parse HTTP request */
4866 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
4867 test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr;
4868 test->i = AF_INET;
4869
4870 /*
4871 * If we are parsing url in frontend space, we prepare backend stage
4872 * to not parse again the same url ! optimization lazyness...
4873 */
4874 if (px->options & PR_O_HTTP_PROXY)
4875 l4->flags |= SN_ADDR_SET;
4876
4877 test->flags = ACL_TEST_F_READ_ONLY;
4878 return 1;
4879}
4880
4881static int
4882acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
4883 struct acl_expr *expr, struct acl_test *test)
4884{
4885 struct http_txn *txn = l7;
4886
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4887 if (!txn)
4888 return 0;
4889
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4890 if (txn->req.msg_state != HTTP_MSG_BODY)
4891 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4892
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100[diff] [blame]4893 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4894 /* ensure the indexes are not affected */
4895 return 0;
4896
4897 /* Same optimization as url_ip */
4898 url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
4899 test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port);
4900
4901 if (px->options & PR_O_HTTP_PROXY)
4902 l4->flags |= SN_ADDR_SET;
4903
4904 test->flags = ACL_TEST_F_READ_ONLY;
4905 return 1;
4906}
4907
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4908/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
4909 * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
4910 */
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4911static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4912acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4913 struct acl_expr *expr, struct acl_test *test)
4914{
4915 struct http_txn *txn = l7;
4916 struct hdr_idx *idx = &txn->hdr_idx;
4917 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4918
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4919 if (!txn)
4920 return 0;
4921
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4922 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
4923 /* search for header from the beginning */
4924 ctx->idx = 0;
4925
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4926 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
4927 test->flags |= ACL_TEST_F_FETCH_MORE;
4928 test->flags |= ACL_TEST_F_VOL_HDR;
4929 test->len = ctx->vlen;
4930 test->ptr = (char *)ctx->line + ctx->val;
4931 return 1;
4932 }
4933
4934 test->flags &= ~ACL_TEST_F_FETCH_MORE;
4935 test->flags |= ACL_TEST_F_VOL_HDR;
4936 return 0;
4937}
4938
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4939static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4940acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
4941 struct acl_expr *expr, struct acl_test *test)
4942{
4943 struct http_txn *txn = l7;
4944
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4945 if (!txn)
4946 return 0;
4947
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4948 if (txn->req.msg_state != HTTP_MSG_BODY)
4949 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4950
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4951 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
4952 /* ensure the indexes are not affected */
4953 return 0;
4954
4955 return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
4956}
4957
4958static int
4959acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
4960 struct acl_expr *expr, struct acl_test *test)
4961{
4962 struct http_txn *txn = l7;
4963
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4964 if (!txn)
4965 return 0;
4966
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4967 if (txn->rsp.msg_state != HTTP_MSG_BODY)
4968 return 0;
4969
4970 return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
4971}
4972
4973/* 6. Check on HTTP header count. The number of occurrences is returned.
4974 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
4975 */
4976static int
4977acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4978 struct acl_expr *expr, struct acl_test *test)
4979{
4980 struct http_txn *txn = l7;
4981 struct hdr_idx *idx = &txn->hdr_idx;
4982 struct hdr_ctx ctx;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4983 int cnt;
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]4984
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]4985 if (!txn)
4986 return 0;
4987
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]4988 ctx.idx = 0;
4989 cnt = 0;
4990 while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
4991 cnt++;
4992
4993 test->i = cnt;
4994 test->flags = ACL_TEST_F_VOL_HDR;
4995 return 1;
4996}
4997
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]4998static int
4999acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
5000 struct acl_expr *expr, struct acl_test *test)
5001{
5002 struct http_txn *txn = l7;
5003
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5004 if (!txn)
5005 return 0;
5006
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5007 if (txn->req.msg_state != HTTP_MSG_BODY)
5008 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5009
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5010 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5011 /* ensure the indexes are not affected */
5012 return 0;
5013
5014 return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
5015}
5016
5017static int
5018acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
5019 struct acl_expr *expr, struct acl_test *test)
5020{
5021 struct http_txn *txn = l7;
5022
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5023 if (!txn)
5024 return 0;
5025
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5026 if (txn->rsp.msg_state != HTTP_MSG_BODY)
5027 return 0;
5028
5029 return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
5030}
5031
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5032/* 7. Check on HTTP header's integer value. The integer value is returned.
5033 * FIXME: the type is 'int', it may not be appropriate for everything.
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5034 * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5035 */
5036static int
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5037acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5038 struct acl_expr *expr, struct acl_test *test)
5039{
5040 struct http_txn *txn = l7;
5041 struct hdr_idx *idx = &txn->hdr_idx;
5042 struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5043
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5044 if (!txn)
5045 return 0;
5046
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5047 if (!(test->flags & ACL_TEST_F_FETCH_MORE))
5048 /* search for header from the beginning */
5049 ctx->idx = 0;
5050
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5051 if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
5052 test->flags |= ACL_TEST_F_FETCH_MORE;
5053 test->flags |= ACL_TEST_F_VOL_HDR;
5054 test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
5055 return 1;
5056 }
5057
5058 test->flags &= ~ACL_TEST_F_FETCH_MORE;
5059 test->flags |= ACL_TEST_F_VOL_HDR;
5060 return 0;
5061}
5062
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5063static int
5064acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
5065 struct acl_expr *expr, struct acl_test *test)
5066{
5067 struct http_txn *txn = l7;
5068
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5069 if (!txn)
5070 return 0;
5071
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5072 if (txn->req.msg_state != HTTP_MSG_BODY)
5073 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5074
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5075 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5076 /* ensure the indexes are not affected */
5077 return 0;
5078
5079 return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
5080}
5081
5082static int
5083acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
5084 struct acl_expr *expr, struct acl_test *test)
5085{
5086 struct http_txn *txn = l7;
5087
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5088 if (!txn)
5089 return 0;
5090
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5091 if (txn->rsp.msg_state != HTTP_MSG_BODY)
5092 return 0;
5093
5094 return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
5095}
5096
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]5097/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
5098 * the first '/' after the possible hostname, and ends before the possible '?'.
5099 */
5100static int
5101acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
5102 struct acl_expr *expr, struct acl_test *test)
5103{
5104 struct http_txn *txn = l7;
5105 char *ptr, *end;
Willy Tarreau33a7e692007-06-10 19:45:56 +0200[diff] [blame]5106
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5107 if (!txn)
5108 return 0;
5109
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5110 if (txn->req.msg_state != HTTP_MSG_BODY)
5111 return 0;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]5112
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5113 if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
5114 /* ensure the indexes are not affected */
5115 return 0;
5116
Willy Tarreau21d2af32008-02-14 20:25:24 +0100[diff] [blame]5117 end = txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l;
5118 ptr = http_get_path(txn);
5119 if (!ptr)
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]5120 return 0;
5121
5122 /* OK, we got the '/' ! */
5123 test->ptr = ptr;
5124
5125 while (ptr < end && *ptr != '?')
5126 ptr++;
5127
5128 test->len = ptr - test->ptr;
5129
5130 /* we do not need to set READ_ONLY because the data is in a buffer */
5131 test->flags = ACL_TEST_F_VOL_1ST;
5132 return 1;
5133}
5134
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]5135static int
5136acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
5137 struct acl_expr *expr, struct acl_test *test)
5138{
5139 struct buffer *req = s->req;
5140 struct http_txn *txn = &s->txn;
5141 struct http_msg *msg = &txn->req;
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]5142
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]5143 /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
5144 * as a layer7 ACL, which involves automatic allocation of hdr_idx.
5145 */
5146
5147 if (!s || !req)
5148 return 0;
5149
5150 if (unlikely(msg->msg_state == HTTP_MSG_BODY)) {
5151 /* Already decoded as OK */
5152 test->flags |= ACL_TEST_F_SET_RES_PASS;
5153 return 1;
5154 }
5155
5156 /* Try to decode HTTP request */
5157 if (likely(req->lr < req->r))
5158 http_msg_analyzer(req, msg, &txn->hdr_idx);
5159
5160 if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
5161 if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
5162 test->flags |= ACL_TEST_F_SET_RES_FAIL;
5163 return 1;
5164 }
5165 /* wait for final state */
5166 test->flags |= ACL_TEST_F_MAY_CHANGE;
5167 return 0;
5168 }
5169
5170 /* OK we got a valid HTTP request. We have some minor preparation to
5171 * perform so that further checks can rely on HTTP tests.
5172 */
5173 msg->sol = req->data + msg->som;
5174 txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
5175 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
5176 s->flags |= SN_REDIRECTABLE;
5177
5178 if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
5179 test->flags |= ACL_TEST_F_SET_RES_FAIL;
5180 return 1;
5181 }
5182
5183 test->flags |= ACL_TEST_F_SET_RES_PASS;
5184 return 1;
5185}
5186
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5187
5188/************************************************************************/
5189/* All supported keywords must be declared here. */
5190/************************************************************************/
5191
5192/* Note: must not be declared <const> as its list will be overwritten */
5193static struct acl_kw_list acl_kws = {{ },{
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]5194 { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
5195
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5196 { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
5197 { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5198 { "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE },
5199 { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5200
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5201 { "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5202 { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
5203 { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
5204 { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
5205 { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
5206 { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
5207 { "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
5208 { "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE },
5209 { "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]5210
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5211 /* note: we should set hdr* to use ACL_USE_HDR_VOLATILE, and chdr* to use L7REQ_VOLATILE */
5212 { "hdr", acl_parse_str, acl_fetch_chdr, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5213 { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
5214 { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
5215 { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
5216 { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
5217 { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
5218 { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
5219 { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
5220 { "hdr_val", acl_parse_int, acl_fetch_chdr_val,acl_match_int, ACL_USE_L7REQ_VOLATILE },
Willy Tarreauc11416f2007-06-17 16:58:38 +0200[diff] [blame]5221
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5222 { "shdr", acl_parse_str, acl_fetch_shdr, acl_match_str, ACL_USE_L7RTR_VOLATILE },
5223 { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
5224 { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
5225 { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
5226 { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
5227 { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
5228 { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
5229 { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
5230 { "shdr_val", acl_parse_int, acl_fetch_shdr_val,acl_match_int, ACL_USE_L7RTR_VOLATILE },
Willy Tarreau737b0c12007-06-10 21:28:46 +0200[diff] [blame]5231
Willy Tarreau0ceba5a2008-07-25 19:31:03 +0200[diff] [blame]5232 { "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE },
5233 { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
5234 { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
5235 { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
5236 { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
5237 { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
5238 { "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]5239
Willy Tarreauf3d25982007-05-08 22:45:09 +0200[diff] [blame]5240 { NULL, NULL, NULL, NULL },
5241
5242#if 0
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5243 { "line", acl_parse_str, acl_fetch_line, acl_match_str },
5244 { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
5245 { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
5246 { "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
5247 { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
5248 { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
5249 { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
5250
Willy Tarreau8797c062007-05-07 00:55:35 +0200[diff] [blame]5251 { "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
5252 { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
5253 { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
5254 { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
5255 { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
5256 { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
5257 { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
5258 { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
5259
5260 { "auth_user", acl_parse_str, acl_fetch_user, acl_match_str },
5261 { "auth_regex", acl_parse_reg, acl_fetch_user, acl_match_reg },
5262 { "auth_clear", acl_parse_str, acl_fetch_auth, acl_match_str },
5263 { "auth_md5", acl_parse_str, acl_fetch_auth, acl_match_md5 },
5264 { NULL, NULL, NULL, NULL },
5265#endif
5266}};
5267
5268
5269__attribute__((constructor))
5270static void __http_protocol_init(void)
5271{
5272 acl_register_keywords(&acl_kws);
5273}
5274
5275
Willy Tarreau58f10d72006-12-04 02:26:12 +0100[diff] [blame]5276/*
Willy Tarreaubaaee002006-06-26 02:48:02 +0200[diff] [blame]5277 * Local variables:
5278 * c-indent-level: 8
5279 * c-basic-offset: 8
5280 * End:
5281 */