1 /*
2 * HTTP protocol analyzer
3 *
4 * Copyright (C) 2018 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com>
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 <haproxy/acl.h>
14 #include <haproxy/action-t.h>
15 #include <haproxy/api.h>
16 #include <haproxy/backend.h>
17 #include <haproxy/base64.h>
18 #include <haproxy/capture-t.h>
19 #include <haproxy/cfgparse.h>
20 #include <haproxy/channel.h>
21 #include <haproxy/check.h>
22 #include <haproxy/connection.h>
23 #include <haproxy/errors.h>
24 #include <haproxy/filters.h>
25 #include <haproxy/http.h>
26 #include <haproxy/http_ana.h>
27 #include <haproxy/http_htx.h>
28 #include <haproxy/htx.h>
29 #include <haproxy/log.h>
30 #include <haproxy/net_helper.h>
31 #include <haproxy/proxy.h>
32 #include <haproxy/regex.h>
33 #include <haproxy/server-t.h>
34 #include <haproxy/stats.h>
35 #include <haproxy/stream.h>
36 #include <haproxy/stream_interface.h>
37 #include <haproxy/trace.h>
38 #include <haproxy/uri_auth-t.h>
39 #include <haproxy/vars.h>
40
41
42 #define TRACE_SOURCE &trace_strm
43
44 extern const char *stat_status_codes[];
45
46 struct pool_head *pool_head_requri __read_mostly = NULL;
47 struct pool_head *pool_head_capture __read_mostly = NULL;
48
49
50 static void http_end_request(struct stream *s);
51 static void http_end_response(struct stream *s);
52
53 static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr);
54 static int http_del_hdr_value(char *start, char *end, char **from, char *next);
55 static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len);
56 static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl);
57 static void http_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v);
58
59 static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
60 static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
61
62 static void http_manage_client_side_cookies(struct stream *s, struct channel *req);
63 static void http_manage_server_side_cookies(struct stream *s, struct channel *res);
64
65 static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend);
66 static int http_handle_stats(struct stream *s, struct channel *req);
67
68 static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg);
69 static int http_reply_100_continue(struct stream *s);
70
71 /* This stream analyser waits for a complete HTTP request. It returns 1 if the
72 * processing can continue on next analysers, or zero if it either needs more
73 * data or wants to immediately abort the request (eg: timeout, error, ...). It
74 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req.analysers
75 * when it has nothing left to do, and may remove any analyser when it wants to
76 * abort.
77 */
http_wait_for_request(struct stream * s,struct channel * req,int an_bit)78 int http_wait_for_request(struct stream *s, struct channel *req, int an_bit)
79 {
80
81 /*
82 * We will analyze a complete HTTP request to check the its syntax.
83 *
84 * Once the start line and all headers are received, we may perform a
85 * capture of the error (if any), and we will set a few fields. We also
86 * check for monitor-uri, logging and finally headers capture.
87 */
88 struct session *sess = s->sess;
89 struct http_txn *txn = s->txn;
90 struct http_msg *msg = &txn->req;
91 struct htx *htx;
92 struct htx_sl *sl;
93
94 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
95
96 if (unlikely(!IS_HTX_STRM(s))) {
97 /* It is only possible when a TCP stream is upgrade to HTTP.
98 * There is a transition period during which there is no
99 * data. The stream is still in raw mode and SF_IGNORE flag is
100 * still set. When this happens, the new mux is responsible to
101 * handle all errors. Thus we may leave immediately.
102 */
103 BUG_ON(!(s->flags & SF_IGNORE) || !c_empty(&s->req));
104
105 /* Don't connect for now */
106 channel_dont_connect(req);
107
108 /* A SHUTR at this stage means we are performing a "destructive"
109 * HTTP upgrade (TCP>H2). In this case, we can leave.
110 */
111 if (req->flags & CF_SHUTR) {
112 s->logs.logwait = 0;
113 s->logs.level = 0;
114 channel_abort(&s->req);
115 channel_abort(&s->res);
116 req->analysers &= AN_REQ_FLT_END;
117 req->analyse_exp = TICK_ETERNITY;
118 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA, s);
119 return 1;
120 }
121 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA, s);
122 return 0;
123 }
124
125 htx = htxbuf(&req->buf);
126
127 /* Parsing errors are caught here */
128 if (htx->flags & (HTX_FL_PARSING_ERROR|HTX_FL_PROCESSING_ERROR)) {
129 stream_inc_http_req_ctr(s);
130 proxy_inc_fe_req_ctr(sess->listener, sess->fe);
131 if (htx->flags & HTX_FL_PARSING_ERROR) {
132 stream_inc_http_err_ctr(s);
133 goto return_bad_req;
134 }
135 else
136 goto return_int_err;
137 }
138
139 /* we're speaking HTTP here, so let's speak HTTP to the client */
140 s->srv_error = http_return_srv_error;
141
142 msg->msg_state = HTTP_MSG_BODY;
143 stream_inc_http_req_ctr(s);
144 proxy_inc_fe_req_ctr(sess->listener, sess->fe); /* one more valid request for this FE */
145
146 /* kill the pending keep-alive timeout */
147 req->analyse_exp = TICK_ETERNITY;
148
149 BUG_ON(htx_get_first_type(htx) != HTX_BLK_REQ_SL);
150 sl = http_get_stline(htx);
151
152 /* 0: we might have to print this header in debug mode */
153 if (unlikely((global.mode & MODE_DEBUG) &&
154 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
155 int32_t pos;
156
157 http_debug_stline("clireq", s, sl);
158
159 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
160 struct htx_blk *blk = htx_get_blk(htx, pos);
161 enum htx_blk_type type = htx_get_blk_type(blk);
162
163 if (type == HTX_BLK_EOH)
164 break;
165 if (type != HTX_BLK_HDR)
166 continue;
167
168 http_debug_hdr("clihdr", s,
169 htx_get_blk_name(htx, blk),
170 htx_get_blk_value(htx, blk));
171 }
172 }
173
174 /*
175 * 1: identify the method and the version. Also set HTTP flags
176 */
177 txn->meth = sl->info.req.meth;
178 if (sl->flags & HTX_SL_F_VER_11)
179 msg->flags |= HTTP_MSGF_VER_11;
180 msg->flags |= HTTP_MSGF_XFER_LEN;
181 if (sl->flags & HTX_SL_F_CLEN)
182 msg->flags |= HTTP_MSGF_CNT_LEN;
183 else if (sl->flags & HTX_SL_F_CHNK)
184 msg->flags |= HTTP_MSGF_TE_CHNK;
185 if (sl->flags & HTX_SL_F_BODYLESS)
186 msg->flags |= HTTP_MSGF_BODYLESS;
187 if (sl->flags & HTX_SL_F_CONN_UPG)
188 msg->flags |= HTTP_MSGF_CONN_UPG;
189
190 /* we can make use of server redirect on GET and HEAD */
191 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
192 s->flags |= SF_REDIRECTABLE;
193 else if (txn->meth == HTTP_METH_OTHER && isteqi(htx_sl_req_meth(sl), ist("PRI"))) {
194 /* PRI is reserved for the HTTP/2 preface */
195 goto return_bad_req;
196 }
197
198 /*
199 * 2: check if the URI matches the monitor_uri. We have to do this for
200 * every request which gets in, because the monitor-uri is defined by
201 * the frontend. If the monitor-uri starts with a '/', the matching is
202 * done against the request's path. Otherwise, the request's uri is
203 * used. It is a workaround to let HTTP/2 health-checks work as
204 * expected.
205 */
206 if (unlikely((sess->fe->monitor_uri_len != 0) &&
207 ((*sess->fe->monitor_uri == '/' && isteq(http_get_path(htx_sl_req_uri(sl)),
208 ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))) ||
209 isteq(htx_sl_req_uri(sl), ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))))) {
210 /*
211 * We have found the monitor URI
212 */
213 struct acl_cond *cond;
214
215 s->flags |= SF_MONITOR;
216 _HA_ATOMIC_INC(&sess->fe->fe_counters.intercepted_req);
217
218 /* Check if we want to fail this monitor request or not */
219 list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) {
220 int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
221
222 ret = acl_pass(ret);
223 if (cond->pol == ACL_COND_UNLESS)
224 ret = !ret;
225
226 if (ret) {
227 /* we fail this request, let's return 503 service unavail */
228 txn->status = 503;
229 if (!(s->flags & SF_ERR_MASK))
230 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
231 goto return_prx_cond;
232 }
233 }
234
235 /* nothing to fail, let's reply normally */
236 txn->status = 200;
237 if (!(s->flags & SF_ERR_MASK))
238 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
239 goto return_prx_cond;
240 }
241
242 /*
243 * 3: Maybe we have to copy the original REQURI for the logs ?
244 * Note: we cannot log anymore if the request has been
245 * classified as invalid.
246 */
247 if (unlikely(s->logs.logwait & LW_REQ)) {
248 /* we have a complete HTTP request that we must log */
249 if ((txn->uri = pool_alloc(pool_head_requri)) != NULL) {
250 size_t len;
251
252 len = http_fmt_req_line(sl, txn->uri, global.tune.requri_len - 1);
253 txn->uri[len] = 0;
254
255 if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT)))
256 s->do_log(s);
257 } else {
258 ha_alert("HTTP logging : out of memory.\n");
259 }
260 }
261
262 /* if the frontend has "option http-use-proxy-header", we'll check if
263 * we have what looks like a proxied connection instead of a connection,
264 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
265 * Note that this is *not* RFC-compliant, however browsers and proxies
266 * happen to do that despite being non-standard :-(
267 * We consider that a request not beginning with either '/' or '*' is
268 * a proxied connection, which covers both "scheme://location" and
269 * CONNECT ip:port.
270 */
271 if ((sess->fe->options2 & PR_O2_USE_PXHDR) &&
272 *HTX_SL_REQ_UPTR(sl) != '/' && *HTX_SL_REQ_UPTR(sl) != '*')
273 txn->flags |= TX_USE_PX_CONN;
274
275 /* 5: we may need to capture headers */
276 if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
277 http_capture_headers(htx, s->req_cap, sess->fe->req_cap);
278
279 /* we may have to wait for the request's body */
280 if (s->be->options & PR_O_WREQ_BODY)
281 req->analysers |= AN_REQ_HTTP_BODY;
282
283 /*
284 * RFC7234#4:
285 * A cache MUST write through requests with methods
286 * that are unsafe (Section 4.2.1 of [RFC7231]) to
287 * the origin server; i.e., a cache is not allowed
288 * to generate a reply to such a request before
289 * having forwarded the request and having received
290 * a corresponding response.
291 *
292 * RFC7231#4.2.1:
293 * Of the request methods defined by this
294 * specification, the GET, HEAD, OPTIONS, and TRACE
295 * methods are defined to be safe.
296 */
297 if (likely(txn->meth == HTTP_METH_GET ||
298 txn->meth == HTTP_METH_HEAD ||
299 txn->meth == HTTP_METH_OPTIONS ||
300 txn->meth == HTTP_METH_TRACE))
301 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
302
303 /* end of job, return OK */
304 req->analysers &= ~an_bit;
305 req->analyse_exp = TICK_ETERNITY;
306
307 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
308 return 1;
309
310 return_int_err:
311 txn->status = 500;
312 if (!(s->flags & SF_ERR_MASK))
313 s->flags |= SF_ERR_INTERNAL;
314 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
315 if (sess->listener && sess->listener->counters)
316 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
317 goto return_prx_cond;
318
319 return_bad_req:
320 txn->status = 400;
321 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
322 if (sess->listener && sess->listener->counters)
323 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
324 /* fall through */
325
326 return_prx_cond:
327 http_reply_and_close(s, txn->status, http_error_message(s));
328
329 if (!(s->flags & SF_ERR_MASK))
330 s->flags |= SF_ERR_PRXCOND;
331 if (!(s->flags & SF_FINST_MASK))
332 s->flags |= SF_FINST_R;
333
334 DBG_TRACE_DEVEL("leaving on error",
335 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
336 return 0;
337 }
338
339
340 /* This stream analyser runs all HTTP request processing which is common to
341 * frontends and backends, which means blocking ACLs, filters, connection-close,
342 * reqadd, stats and redirects. This is performed for the designated proxy.
343 * It returns 1 if the processing can continue on next analysers, or zero if it
344 * either needs more data or wants to immediately abort the request (eg: deny,
345 * error, ...).
346 */
http_process_req_common(struct stream * s,struct channel * req,int an_bit,struct proxy * px)347 int http_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px)
348 {
349 struct session *sess = s->sess;
350 struct http_txn *txn = s->txn;
351 struct http_msg *msg = &txn->req;
352 struct htx *htx;
353 struct redirect_rule *rule;
354 enum rule_result verdict;
355 struct connection *conn = objt_conn(sess->origin);
356
357 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
358
359 htx = htxbuf(&req->buf);
360
361 /* just in case we have some per-backend tracking. Only called the first
362 * execution of the analyser. */
363 if (!s->current_rule || s->current_rule_list != &px->http_req_rules)
364 stream_inc_be_http_req_ctr(s);
365
366 /* evaluate http-request rules */
367 if (!LIST_ISEMPTY(&px->http_req_rules)) {
368 verdict = http_req_get_intercept_rule(px, &px->http_req_rules, s);
369
370 switch (verdict) {
371 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
372 goto return_prx_yield;
373
374 case HTTP_RULE_RES_CONT:
375 case HTTP_RULE_RES_STOP: /* nothing to do */
376 break;
377
378 case HTTP_RULE_RES_DENY: /* deny or tarpit */
379 if (txn->flags & TX_CLTARPIT)
380 goto tarpit;
381 goto deny;
382
383 case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */
384 goto return_prx_cond;
385
386 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
387 goto done;
388
389 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
390 goto return_bad_req;
391
392 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
393 goto return_int_err;
394 }
395 }
396
397 if (conn && (conn->flags & CO_FL_EARLY_DATA) &&
398 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_SSL_WAIT_HS))) {
399 struct http_hdr_ctx ctx;
400
401 ctx.blk = NULL;
402 if (!http_find_header(htx, ist("Early-Data"), &ctx, 0)) {
403 if (unlikely(!http_add_header(htx, ist("Early-Data"), ist("1"))))
404 goto return_int_err;
405 }
406 }
407
408 /* OK at this stage, we know that the request was accepted according to
409 * the http-request rules, we can check for the stats. Note that the
410 * URI is detected *before* the req* rules in order not to be affected
411 * by a possible reqrep, while they are processed *after* so that a
412 * reqdeny can still block them. This clearly needs to change in 1.6!
413 */
414 if (!s->target && http_stats_check_uri(s, txn, px)) {
415 s->target = &http_stats_applet.obj_type;
416 if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) {
417 s->logs.tv_request = now;
418 if (!(s->flags & SF_ERR_MASK))
419 s->flags |= SF_ERR_RESOURCE;
420 goto return_int_err;
421 }
422
423 /* parse the whole stats request and extract the relevant information */
424 http_handle_stats(s, req);
425 verdict = http_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s);
426 /* not all actions implemented: deny, allow, auth */
427
428 if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */
429 goto deny;
430
431 if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */
432 goto return_prx_cond;
433
434 if (verdict == HTTP_RULE_RES_BADREQ) /* failed with a bad request */
435 goto return_bad_req;
436
437 if (verdict == HTTP_RULE_RES_ERROR) /* failed with a bad request */
438 goto return_int_err;
439 }
440
441 /* Proceed with the applets now. */
442 if (unlikely(objt_applet(s->target))) {
443 if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
444 _HA_ATOMIC_INC(&sess->fe->fe_counters.intercepted_req);
445
446 if (http_handle_expect_hdr(s, htx, msg) == -1)
447 goto return_int_err;
448
449 if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is
450 s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy
451 if (!(s->flags & SF_FINST_MASK))
452 s->flags |= SF_FINST_R;
453
454 if (HAS_FILTERS(s))
455 req->analysers |= AN_REQ_FLT_HTTP_HDRS;
456
457 /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */
458 req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END);
459 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
460 req->analysers |= AN_REQ_HTTP_XFER_BODY;
461
462 req->flags |= CF_SEND_DONTWAIT;
463 s->flags |= SF_ASSIGNED;
464 goto done;
465 }
466
467 /* check whether we have some ACLs set to redirect this request */
468 list_for_each_entry(rule, &px->redirect_rules, list) {
469 if (rule->cond) {
470 int ret;
471
472 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
473 ret = acl_pass(ret);
474 if (rule->cond->pol == ACL_COND_UNLESS)
475 ret = !ret;
476 if (!ret)
477 continue;
478 }
479 if (!http_apply_redirect_rule(rule, s, txn))
480 goto return_int_err;
481 goto done;
482 }
483
484 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
485 * If this happens, then the data will not come immediately, so we must
486 * send all what we have without waiting. Note that due to the small gain
487 * in waiting for the body of the request, it's easier to simply put the
488 * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
489 * itself once used.
490 */
491 req->flags |= CF_SEND_DONTWAIT;
492
493 done: /* done with this analyser, continue with next ones that the calling
494 * points will have set, if any.
495 */
496 req->analyse_exp = TICK_ETERNITY;
497 done_without_exp: /* done with this analyser, but don't reset the analyse_exp. */
498 req->analysers &= ~an_bit;
499 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
500 return 1;
501
502 tarpit:
503 /* Allow cookie logging
504 */
505 if (s->be->cookie_name || sess->fe->capture_name)
506 http_manage_client_side_cookies(s, req);
507
508 /* When a connection is tarpitted, we use the tarpit timeout,
509 * which may be the same as the connect timeout if unspecified.
510 * If unset, then set it to zero because we really want it to
511 * eventually expire. We build the tarpit as an analyser.
512 */
513 channel_htx_erase(&s->req, htx);
514
515 /* wipe the request out so that we can drop the connection early
516 * if the client closes first.
517 */
518 channel_dont_connect(req);
519
520 req->analysers &= AN_REQ_FLT_END; /* remove switching rules etc... */
521 req->analysers |= AN_REQ_HTTP_TARPIT;
522 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
523 if (!req->analyse_exp)
524 req->analyse_exp = tick_add(now_ms, 0);
525 stream_inc_http_err_ctr(s);
526 _HA_ATOMIC_INC(&sess->fe->fe_counters.denied_req);
527 if (s->flags & SF_BE_ASSIGNED)
528 _HA_ATOMIC_INC(&s->be->be_counters.denied_req);
529 if (sess->listener && sess->listener->counters)
530 _HA_ATOMIC_INC(&sess->listener->counters->denied_req);
531 goto done_without_exp;
532
533 deny: /* this request was blocked (denied) */
534
535 /* Allow cookie logging
536 */
537 if (s->be->cookie_name || sess->fe->capture_name)
538 http_manage_client_side_cookies(s, req);
539
540 s->logs.tv_request = now;
541 stream_inc_http_err_ctr(s);
542 _HA_ATOMIC_INC(&sess->fe->fe_counters.denied_req);
543 if (s->flags & SF_BE_ASSIGNED)
544 _HA_ATOMIC_INC(&s->be->be_counters.denied_req);
545 if (sess->listener && sess->listener->counters)
546 _HA_ATOMIC_INC(&sess->listener->counters->denied_req);
547 goto return_prx_err;
548
549 return_int_err:
550 txn->status = 500;
551 if (!(s->flags & SF_ERR_MASK))
552 s->flags |= SF_ERR_INTERNAL;
553 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
554 if (s->flags & SF_BE_ASSIGNED)
555 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
556 if (sess->listener && sess->listener->counters)
557 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
558 goto return_prx_err;
559
560 return_bad_req:
561 txn->status = 400;
562 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
563 if (sess->listener && sess->listener->counters)
564 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
565 /* fall through */
566
567 return_prx_err:
568 http_reply_and_close(s, txn->status, http_error_message(s));
569 /* fall through */
570
571 return_prx_cond:
572 if (!(s->flags & SF_ERR_MASK))
573 s->flags |= SF_ERR_PRXCOND;
574 if (!(s->flags & SF_FINST_MASK))
575 s->flags |= SF_FINST_R;
576
577 req->analysers &= AN_REQ_FLT_END;
578 req->analyse_exp = TICK_ETERNITY;
579 DBG_TRACE_DEVEL("leaving on error",
580 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
581 return 0;
582
583 return_prx_yield:
584 channel_dont_connect(req);
585 DBG_TRACE_DEVEL("waiting for more data",
586 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
587 return 0;
588 }
589
590 /* This function performs all the processing enabled for the current request.
591 * It returns 1 if the processing can continue on next analysers, or zero if it
592 * needs more data, encounters an error, or wants to immediately abort the
593 * request. It relies on buffers flags, and updates s->req.analysers.
594 */
http_process_request(struct stream * s,struct channel * req,int an_bit)595 int http_process_request(struct stream *s, struct channel *req, int an_bit)
596 {
597 struct session *sess = s->sess;
598 struct http_txn *txn = s->txn;
599 struct htx *htx;
600 struct connection *cli_conn = objt_conn(strm_sess(s)->origin);
601
602 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
603
604 /*
605 * Right now, we know that we have processed the entire headers
606 * and that unwanted requests have been filtered out. We can do
607 * whatever we want with the remaining request. Also, now we
608 * may have separate values for ->fe, ->be.
609 */
610 htx = htxbuf(&req->buf);
611
612 /*
613 * If HTTP PROXY is set we simply get remote server address parsing
614 * incoming request.
615 */
616 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
617 struct htx_sl *sl;
618 struct ist uri, path;
619
620 if (!sockaddr_alloc(&s->target_addr, NULL, 0)) {
621 if (!(s->flags & SF_ERR_MASK))
622 s->flags |= SF_ERR_RESOURCE;
623 goto return_int_err;
624 }
625 sl = http_get_stline(htx);
626 uri = htx_sl_req_uri(sl);
627 path = http_get_path(uri);
628
629 if (url2sa(uri.ptr, uri.len - path.len, s->target_addr, NULL) == -1)
630 goto return_bad_req;
631
632 s->target = &s->be->obj_type;
633 s->flags |= SF_ADDR_SET | SF_ASSIGNED;
634
635 /* if the path was found, we have to remove everything between
636 * uri.ptr and path.ptr (excluded). If it was not found, we need
637 * to replace from all the uri by a single "/".
638 *
639 * Instead of rewriting the whole start line, we just update
640 * the star-line URI. Some space will be lost but it should be
641 * insignificant.
642 */
643 istcpy(&uri, (path.len ? path : ist("/")), uri.len);
644 }
645
646 /*
647 * 7: Now we can work with the cookies.
648 * Note that doing so might move headers in the request, but
649 * the fields will stay coherent and the URI will not move.
650 * This should only be performed in the backend.
651 */
652 if (s->be->cookie_name || sess->fe->capture_name)
653 http_manage_client_side_cookies(s, req);
654
655 /* 8: Generate unique ID if a "unique-id-format" is defined.
656 *
657 * A unique ID is generated even when it is not sent to ensure that the ID can make use of
658 * fetches only available in the HTTP request processing stage.
659 */
660 if (!LIST_ISEMPTY(&sess->fe->format_unique_id)) {
661 struct ist unique_id = stream_generate_unique_id(s, &sess->fe->format_unique_id);
662
663 if (!isttest(unique_id)) {
664 if (!(s->flags & SF_ERR_MASK))
665 s->flags |= SF_ERR_RESOURCE;
666 goto return_int_err;
667 }
668
669 /* send unique ID if a "unique-id-header" is defined */
670 if (isttest(sess->fe->header_unique_id) &&
671 unlikely(!http_add_header(htx, sess->fe->header_unique_id, s->unique_id)))
672 goto return_int_err;
673 }
674
675 /*
676 * 9: add X-Forwarded-For if either the frontend or the backend
677 * asks for it.
678 */
679 if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) {
680 struct http_hdr_ctx ctx = { .blk = NULL };
681 struct ist hdr = ist2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name,
682 s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len);
683
684 if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
685 http_find_header(htx, hdr, &ctx, 0)) {
686 /* The header is set to be added only if none is present
687 * and we found it, so don't do anything.
688 */
689 }
690 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET) {
691 /* Add an X-Forwarded-For header unless the source IP is
692 * in the 'except' network range.
693 */
694 if (ipcmp2net(cli_conn->src, &sess->fe->except_xff_net) &&
695 ipcmp2net(cli_conn->src, &s->be->except_xff_net)) {
696 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->src)->sin_addr;
697
698 /* Note: we rely on the backend to get the header name to be used for
699 * x-forwarded-for, because the header is really meant for the backends.
700 * However, if the backend did not specify any option, we have to rely
701 * on the frontend's header name.
702 */
703 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
704 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
705 goto return_int_err;
706 }
707 }
708 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET6) {
709 /* Add an X-Forwarded-For header unless the source IP is
710 * in the 'except' network range.
711 */
712 if (ipcmp2net(cli_conn->src, &sess->fe->except_xff_net) &&
713 ipcmp2net(cli_conn->src, &s->be->except_xff_net)) {
714 char pn[INET6_ADDRSTRLEN];
715
716 inet_ntop(AF_INET6,
717 (const void *)&((struct sockaddr_in6 *)(cli_conn->src))->sin6_addr,
718 pn, sizeof(pn));
719
720 /* Note: we rely on the backend to get the header name to be used for
721 * x-forwarded-for, because the header is really meant for the backends.
722 * However, if the backend did not specify any option, we have to rely
723 * on the frontend's header name.
724 */
725 chunk_printf(&trash, "%s", pn);
726 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
727 goto return_int_err;
728 }
729 }
730 }
731
732 /*
733 * 10: add X-Original-To if either the frontend or the backend
734 * asks for it.
735 */
736 if ((sess->fe->options | s->be->options) & PR_O_ORGTO) {
737 struct ist hdr = ist2(s->be->orgto_hdr_len ? s->be->orgto_hdr_name : sess->fe->orgto_hdr_name,
738 s->be->orgto_hdr_len ? s->be->orgto_hdr_len : sess->fe->orgto_hdr_len);
739
740 if (cli_conn && conn_get_dst(cli_conn) && cli_conn->dst->ss_family == AF_INET) {
741 /* Add an X-Original-To header unless the destination IP is
742 * in the 'except' network range.
743 */
744 if (ipcmp2net(cli_conn->dst, &sess->fe->except_xot_net) &&
745 ipcmp2net(cli_conn->dst, &s->be->except_xot_net)) {
746 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->dst)->sin_addr;
747
748 /* Note: we rely on the backend to get the header name to be used for
749 * x-original-to, because the header is really meant for the backends.
750 * However, if the backend did not specify any option, we have to rely
751 * on the frontend's header name.
752 */
753 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
754 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
755 goto return_int_err;
756 }
757 }
758 else if (cli_conn && conn_get_dst(cli_conn) && cli_conn->dst->ss_family == AF_INET6) {
759 /* Add an X-Original-To header unless the source IP is
760 * in the 'except' network range.
761 */
762 if (ipcmp2net(cli_conn->dst, &sess->fe->except_xot_net) &&
763 ipcmp2net(cli_conn->dst, &s->be->except_xot_net)) {
764 char pn[INET6_ADDRSTRLEN];
765
766 inet_ntop(AF_INET6,
767 (const void *)&((struct sockaddr_in6 *)(cli_conn->dst))->sin6_addr,
768 pn, sizeof(pn));
769
770 /* Note: we rely on the backend to get the header name to be used for
771 * x-forwarded-for, because the header is really meant for the backends.
772 * However, if the backend did not specify any option, we have to rely
773 * on the frontend's header name.
774 */
775 chunk_printf(&trash, "%s", pn);
776 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
777 goto return_int_err;
778 }
779 }
780 }
781
782 /* Filter the request headers if there are filters attached to the
783 * stream.
784 */
785 if (HAS_FILTERS(s))
786 req->analysers |= AN_REQ_FLT_HTTP_HDRS;
787
788 /* If we have no server assigned yet and we're balancing on url_param
789 * with a POST request, we may be interested in checking the body for
790 * that parameter. This will be done in another analyser.
791 */
792 if (!(s->flags & (SF_ASSIGNED|SF_DIRECT)) &&
793 s->txn->meth == HTTP_METH_POST &&
794 (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH) {
795 channel_dont_connect(req);
796 req->analysers |= AN_REQ_HTTP_BODY;
797 }
798
799 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
800 req->analysers |= AN_REQ_HTTP_XFER_BODY;
801
802 /* We expect some data from the client. Unless we know for sure
803 * we already have a full request, we have to re-enable quick-ack
804 * in case we previously disabled it, otherwise we might cause
805 * the client to delay further data.
806 */
807 if ((sess->listener && (sess->listener->options & LI_O_NOQUICKACK)) && !(htx->flags & HTX_FL_EOM))
808 conn_set_quickack(cli_conn, 1);
809
810 /*************************************************************
811 * OK, that's finished for the headers. We have done what we *
812 * could. Let's switch to the DATA state. *
813 ************************************************************/
814 req->analyse_exp = TICK_ETERNITY;
815 req->analysers &= ~an_bit;
816
817 s->logs.tv_request = now;
818 /* OK let's go on with the BODY now */
819 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
820 return 1;
821
822 return_int_err:
823 txn->status = 500;
824 if (!(s->flags & SF_ERR_MASK))
825 s->flags |= SF_ERR_INTERNAL;
826 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
827 if (s->flags & SF_BE_ASSIGNED)
828 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
829 if (sess->listener && sess->listener->counters)
830 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
831 goto return_prx_cond;
832
833 return_bad_req: /* let's centralize all bad requests */
834 txn->status = 400;
835 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
836 if (sess->listener && sess->listener->counters)
837 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
838 /* fall through */
839
840 return_prx_cond:
841 http_reply_and_close(s, txn->status, http_error_message(s));
842
843 if (!(s->flags & SF_ERR_MASK))
844 s->flags |= SF_ERR_PRXCOND;
845 if (!(s->flags & SF_FINST_MASK))
846 s->flags |= SF_FINST_R;
847
848 DBG_TRACE_DEVEL("leaving on error",
849 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
850 return 0;
851 }
852
853 /* This function is an analyser which processes the HTTP tarpit. It always
854 * returns zero, at the beginning because it prevents any other processing
855 * from occurring, and at the end because it terminates the request.
856 */
http_process_tarpit(struct stream * s,struct channel * req,int an_bit)857 int http_process_tarpit(struct stream *s, struct channel *req, int an_bit)
858 {
859 struct http_txn *txn = s->txn;
860
861 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, &txn->req);
862 /* This connection is being tarpitted. The CLIENT side has
863 * already set the connect expiration date to the right
864 * timeout. We just have to check that the client is still
865 * there and that the timeout has not expired.
866 */
867 channel_dont_connect(req);
868 if ((req->flags & (CF_SHUTR|CF_READ_ERROR)) == 0 &&
869 !tick_is_expired(req->analyse_exp, now_ms)) {
870 /* Be sure to drain all data from the request channel */
871 channel_htx_erase(req, htxbuf(&req->buf));
872 DBG_TRACE_DEVEL("waiting for tarpit timeout expiry",
873 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
874 return 0;
875 }
876
877
878 /* We will set the queue timer to the time spent, just for
879 * logging purposes. We fake a 500 server error, so that the
880 * attacker will not suspect his connection has been tarpitted.
881 * It will not cause trouble to the logs because we can exclude
882 * the tarpitted connections by filtering on the 'PT' status flags.
883 */
884 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
885
886 http_reply_and_close(s, txn->status, (!(req->flags & CF_READ_ERROR) ? http_error_message(s) : NULL));
887
888 if (!(s->flags & SF_ERR_MASK))
889 s->flags |= SF_ERR_PRXCOND;
890 if (!(s->flags & SF_FINST_MASK))
891 s->flags |= SF_FINST_T;
892
893 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
894 return 0;
895 }
896
897 /* This function is an analyser which waits for the HTTP request body. It waits
898 * for either the buffer to be full, or the full advertised contents to have
899 * reached the buffer. It must only be called after the standard HTTP request
900 * processing has occurred, because it expects the request to be parsed and will
901 * look for the Expect header. It may send a 100-Continue interim response. It
902 * takes in input any state starting from HTTP_MSG_BODY and leaves with one of
903 * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it
904 * needs to read more data, or 1 once it has completed its analysis.
905 */
http_wait_for_request_body(struct stream * s,struct channel * req,int an_bit)906 int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit)
907 {
908 struct session *sess = s->sess;
909 struct http_txn *txn = s->txn;
910 struct http_msg *msg = &s->txn->req;
911
912 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
913
914
915 switch (http_wait_for_msg_body(s, req, s->be->timeout.httpreq, 0)) {
916 case HTTP_RULE_RES_CONT:
917 goto http_end;
918 case HTTP_RULE_RES_YIELD:
919 goto missing_data_or_waiting;
920 case HTTP_RULE_RES_BADREQ:
921 goto return_bad_req;
922 case HTTP_RULE_RES_ERROR:
923 goto return_int_err;
924 case HTTP_RULE_RES_ABRT:
925 goto return_prx_cond;
926 default:
927 goto return_int_err;
928 }
929
930 http_end:
931 /* The situation will not evolve, so let's give up on the analysis. */
932 s->logs.tv_request = now; /* update the request timer to reflect full request */
933 req->analysers &= ~an_bit;
934 req->analyse_exp = TICK_ETERNITY;
935 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
936 return 1;
937
938 missing_data_or_waiting:
939 channel_dont_connect(req);
940 DBG_TRACE_DEVEL("waiting for more data",
941 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
942 return 0;
943
944 return_int_err:
945 txn->status = 500;
946 if (!(s->flags & SF_ERR_MASK))
947 s->flags |= SF_ERR_INTERNAL;
948 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
949 if (s->flags & SF_BE_ASSIGNED)
950 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
951 if (sess->listener && sess->listener->counters)
952 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
953 goto return_prx_err;
954
955 return_bad_req: /* let's centralize all bad requests */
956 txn->status = 400;
957 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
958 if (sess->listener && sess->listener->counters)
959 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
960 /* fall through */
961
962 return_prx_err:
963 http_reply_and_close(s, txn->status, http_error_message(s));
964 /* fall through */
965
966 return_prx_cond:
967 if (!(s->flags & SF_ERR_MASK))
968 s->flags |= SF_ERR_PRXCOND;
969 if (!(s->flags & SF_FINST_MASK))
970 s->flags |= (msg->msg_state < HTTP_MSG_DATA ? SF_FINST_R : SF_FINST_D);
971
972 req->analysers &= AN_REQ_FLT_END;
973 req->analyse_exp = TICK_ETERNITY;
974 DBG_TRACE_DEVEL("leaving on error",
975 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
976 return 0;
977 }
978
979 /* This function is an analyser which forwards request body (including chunk
980 * sizes if any). It is called as soon as we must forward, even if we forward
981 * zero byte. The only situation where it must not be called is when we're in
982 * tunnel mode and we want to forward till the close. It's used both to forward
983 * remaining data and to resync after end of body. It expects the msg_state to
984 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
985 * read more data, or 1 once we can go on with next request or end the stream.
986 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
987 * bytes of pending data + the headers if not already done.
988 */
http_request_forward_body(struct stream * s,struct channel * req,int an_bit)989 int http_request_forward_body(struct stream *s, struct channel *req, int an_bit)
990 {
991 struct session *sess = s->sess;
992 struct http_txn *txn = s->txn;
993 struct http_msg *msg = &txn->req;
994 struct htx *htx;
995 short status = 0;
996 int ret;
997
998 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
999
1000 htx = htxbuf(&req->buf);
1001
1002 if (htx->flags & HTX_FL_PARSING_ERROR)
1003 goto return_bad_req;
1004 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1005 goto return_int_err;
1006
1007 if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
1008 ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) {
1009 /* Output closed while we were sending data. We must abort and
1010 * wake the other side up.
1011 *
1012 * If we have finished to send the request and the response is
1013 * still in progress, don't catch write error on the request
1014 * side if it is in fact a read error on the server side.
1015 */
1016 if (msg->msg_state == HTTP_MSG_DONE && (s->res.flags & CF_READ_ERROR) && s->res.analysers)
1017 return 0;
1018
1019 /* Don't abort yet if we had L7 retries activated and it
1020 * was a write error, we may recover.
1021 */
1022 if (!(req->flags & (CF_READ_ERROR | CF_READ_TIMEOUT)) &&
1023 (s->si[1].flags & SI_FL_L7_RETRY)) {
1024 DBG_TRACE_DEVEL("leaving on L7 retry",
1025 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1026 return 0;
1027 }
1028 msg->msg_state = HTTP_MSG_ERROR;
1029 http_end_request(s);
1030 http_end_response(s);
1031 DBG_TRACE_DEVEL("leaving on error",
1032 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1033 return 1;
1034 }
1035
1036 /* Note that we don't have to send 100-continue back because we don't
1037 * need the data to complete our job, and it's up to the server to
1038 * decide whether to return 100, 417 or anything else in return of
1039 * an "Expect: 100-continue" header.
1040 */
1041 if (msg->msg_state == HTTP_MSG_BODY)
1042 msg->msg_state = HTTP_MSG_DATA;
1043
1044 /* in most states, we should abort in case of early close */
1045 channel_auto_close(req);
1046
1047 if (req->to_forward) {
1048 if (req->to_forward == CHN_INFINITE_FORWARD) {
1049 if (req->flags & CF_EOI)
1050 msg->msg_state = HTTP_MSG_ENDING;
1051 }
1052 else {
1053 /* We can't process the buffer's contents yet */
1054 req->flags |= CF_WAKE_WRITE;
1055 goto missing_data_or_waiting;
1056 }
1057 }
1058
1059 if (msg->msg_state >= HTTP_MSG_ENDING)
1060 goto ending;
1061
1062 if (txn->meth == HTTP_METH_CONNECT) {
1063 msg->msg_state = HTTP_MSG_ENDING;
1064 goto ending;
1065 }
1066
1067 /* Forward input data. We get it by removing all outgoing data not
1068 * forwarded yet from HTX data size. If there are some data filters, we
1069 * let them decide the amount of data to forward.
1070 */
1071 if (HAS_REQ_DATA_FILTERS(s)) {
1072 ret = flt_http_payload(s, msg, htx->data);
1073 if (ret < 0)
1074 goto return_bad_req;
1075 c_adv(req, ret);
1076 }
1077 else {
1078 c_adv(req, htx->data - co_data(req));
1079 if (msg->flags & HTTP_MSGF_XFER_LEN)
1080 channel_htx_forward_forever(req, htx);
1081 }
1082
1083 if (htx->data != co_data(req))
1084 goto missing_data_or_waiting;
1085
1086 /* Check if the end-of-message is reached and if so, switch the message
1087 * in HTTP_MSG_ENDING state. Then if all data was marked to be
1088 * forwarded, set the state to HTTP_MSG_DONE.
1089 */
1090 if (!(htx->flags & HTX_FL_EOM))
1091 goto missing_data_or_waiting;
1092
1093 msg->msg_state = HTTP_MSG_ENDING;
1094
1095 ending:
1096 req->flags &= ~CF_EXPECT_MORE; /* no more data are expected */
1097
1098 /* other states, ENDING...TUNNEL */
1099 if (msg->msg_state >= HTTP_MSG_DONE)
1100 goto done;
1101
1102 if (HAS_REQ_DATA_FILTERS(s)) {
1103 ret = flt_http_end(s, msg);
1104 if (ret <= 0) {
1105 if (!ret)
1106 goto missing_data_or_waiting;
1107 goto return_bad_req;
1108 }
1109 }
1110
1111 if (txn->meth == HTTP_METH_CONNECT)
1112 msg->msg_state = HTTP_MSG_TUNNEL;
1113 else {
1114 msg->msg_state = HTTP_MSG_DONE;
1115 req->to_forward = 0;
1116 }
1117
1118 done:
1119 /* we don't want to forward closes on DONE except in tunnel mode. */
1120 if (!(txn->flags & TX_CON_WANT_TUN))
1121 channel_dont_close(req);
1122
1123 http_end_request(s);
1124 if (!(req->analysers & an_bit)) {
1125 http_end_response(s);
1126 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
1127 if (req->flags & CF_SHUTW) {
1128 /* request errors are most likely due to the
1129 * server aborting the transfer. */
1130 goto return_srv_abort;
1131 }
1132 goto return_bad_req;
1133 }
1134 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1135 return 1;
1136 }
1137
1138 /* If "option abortonclose" is set on the backend, we want to monitor
1139 * the client's connection and forward any shutdown notification to the
1140 * server, which will decide whether to close or to go on processing the
1141 * request. We only do that in tunnel mode, and not in other modes since
1142 * it can be abused to exhaust source ports. */
1143 if (s->be->options & PR_O_ABRT_CLOSE) {
1144 channel_auto_read(req);
1145 if ((req->flags & (CF_SHUTR|CF_READ_NULL)) && !(txn->flags & TX_CON_WANT_TUN))
1146 s->si[1].flags |= SI_FL_NOLINGER;
1147 channel_auto_close(req);
1148 }
1149 else if (s->txn->meth == HTTP_METH_POST) {
1150 /* POST requests may require to read extra CRLF sent by broken
1151 * browsers and which could cause an RST to be sent upon close
1152 * on some systems (eg: Linux). */
1153 channel_auto_read(req);
1154 }
1155 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
1156 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1157 return 0;
1158
1159 missing_data_or_waiting:
1160 /* stop waiting for data if the input is closed before the end */
1161 if (msg->msg_state < HTTP_MSG_ENDING && req->flags & CF_SHUTR)
1162 goto return_cli_abort;
1163
1164 waiting:
1165 /* waiting for the last bits to leave the buffer */
1166 if (req->flags & CF_SHUTW)
1167 goto return_srv_abort;
1168
1169 /* When TE: chunked is used, we need to get there again to parse remaining
1170 * chunks even if the client has closed, so we don't want to set CF_DONTCLOSE.
1171 * And when content-length is used, we never want to let the possible
1172 * shutdown be forwarded to the other side, as the state machine will
1173 * take care of it once the client responds. It's also important to
1174 * prevent TIME_WAITs from accumulating on the backend side, and for
1175 * HTTP/2 where the last frame comes with a shutdown.
1176 */
1177 if (msg->flags & HTTP_MSGF_XFER_LEN)
1178 channel_dont_close(req);
1179
1180 /* We know that more data are expected, but we couldn't send more that
1181 * what we did. So we always set the CF_EXPECT_MORE flag so that the
1182 * system knows it must not set a PUSH on this first part. Interactive
1183 * modes are already handled by the stream sock layer. We must not do
1184 * this in content-length mode because it could present the MSG_MORE
1185 * flag with the last block of forwarded data, which would cause an
1186 * additional delay to be observed by the receiver.
1187 */
1188 if (HAS_REQ_DATA_FILTERS(s))
1189 req->flags |= CF_EXPECT_MORE;
1190
1191 DBG_TRACE_DEVEL("waiting for more data to forward",
1192 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1193 return 0;
1194
1195 return_cli_abort:
1196 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
1197 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
1198 if (sess->listener && sess->listener->counters)
1199 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
1200 if (objt_server(s->target))
1201 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
1202 if (!(s->flags & SF_ERR_MASK))
1203 s->flags |= SF_ERR_CLICL;
1204 status = 400;
1205 goto return_prx_cond;
1206
1207 return_srv_abort:
1208 _HA_ATOMIC_INC(&sess->fe->fe_counters.srv_aborts);
1209 _HA_ATOMIC_INC(&s->be->be_counters.srv_aborts);
1210 if (sess->listener && sess->listener->counters)
1211 _HA_ATOMIC_INC(&sess->listener->counters->srv_aborts);
1212 if (objt_server(s->target))
1213 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.srv_aborts);
1214 if (!(s->flags & SF_ERR_MASK))
1215 s->flags |= SF_ERR_SRVCL;
1216 status = 502;
1217 goto return_prx_cond;
1218
1219 return_int_err:
1220 if (!(s->flags & SF_ERR_MASK))
1221 s->flags |= SF_ERR_INTERNAL;
1222 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
1223 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
1224 if (sess->listener && sess->listener->counters)
1225 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
1226 if (objt_server(s->target))
1227 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
1228 status = 500;
1229 goto return_prx_cond;
1230
1231 return_bad_req:
1232 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
1233 if (sess->listener && sess->listener->counters)
1234 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
1235 status = 400;
1236 /* fall through */
1237
1238 return_prx_cond:
1239 if (txn->status > 0) {
1240 /* Note: we don't send any error if some data were already sent */
1241 http_reply_and_close(s, txn->status, NULL);
1242 } else {
1243 txn->status = status;
1244 http_reply_and_close(s, txn->status, http_error_message(s));
1245 }
1246 if (!(s->flags & SF_ERR_MASK))
1247 s->flags |= SF_ERR_PRXCOND;
1248 if (!(s->flags & SF_FINST_MASK))
1249 s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D);
1250 DBG_TRACE_DEVEL("leaving on error ",
1251 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1252 return 0;
1253 }
1254
1255 /* Reset the stream and the backend stream_interface to a situation suitable for attemption connection */
1256 /* Returns 0 if we can attempt to retry, -1 otherwise */
do_l7_retry(struct stream * s,struct stream_interface * si)1257 static __inline int do_l7_retry(struct stream *s, struct stream_interface *si)
1258 {
1259 struct channel *req, *res;
1260 int co_data;
1261
1262 si->conn_retries--;
1263 if (si->conn_retries < 0)
1264 return -1;
1265
1266 if (objt_server(s->target)) {
1267 if (s->flags & SF_CURR_SESS) {
1268 s->flags &= ~SF_CURR_SESS;
1269 _HA_ATOMIC_DEC(&__objt_server(s->target)->cur_sess);
1270 }
1271 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.retries);
1272 }
1273 _HA_ATOMIC_INC(&s->be->be_counters.retries);
1274
1275 req = &s->req;
1276 res = &s->res;
1277 /* Remove any write error from the request, and read error from the response */
1278 req->flags &= ~(CF_WRITE_ERROR | CF_WRITE_TIMEOUT | CF_SHUTW | CF_SHUTW_NOW);
1279 res->flags &= ~(CF_READ_ERROR | CF_READ_TIMEOUT | CF_SHUTR | CF_EOI | CF_READ_NULL | CF_SHUTR_NOW);
1280 res->analysers = 0;
1281 si->flags &= ~(SI_FL_ERR | SI_FL_EXP | SI_FL_RXBLK_SHUT);
1282 si->err_type = SI_ET_NONE;
1283 s->flags &= ~(SF_ERR_MASK | SF_FINST_MASK);
1284 stream_choose_redispatch(s);
1285 si->exp = TICK_ETERNITY;
1286 res->rex = TICK_ETERNITY;
1287 res->to_forward = 0;
1288 res->analyse_exp = TICK_ETERNITY;
1289 res->total = 0;
1290 si_release_endpoint(&s->si[1]);
1291
1292 b_free(&req->buf);
1293 /* Swap the L7 buffer with the channel buffer */
1294 /* We know we stored the co_data as b_data, so get it there */
1295 co_data = b_data(&si->l7_buffer);
1296 b_set_data(&si->l7_buffer, b_size(&si->l7_buffer));
1297 b_xfer(&req->buf, &si->l7_buffer, b_data(&si->l7_buffer));
1298 co_set_data(req, co_data);
1299
1300 DBG_TRACE_DEVEL("perform a L7 retry", STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, s->txn);
1301
1302 b_reset(&res->buf);
1303 co_set_data(res, 0);
1304 return 0;
1305 }
1306
1307 /* This stream analyser waits for a complete HTTP response. It returns 1 if the
1308 * processing can continue on next analysers, or zero if it either needs more
1309 * data or wants to immediately abort the response (eg: timeout, error, ...). It
1310 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
1311 * when it has nothing left to do, and may remove any analyser when it wants to
1312 * abort.
1313 */
http_wait_for_response(struct stream * s,struct channel * rep,int an_bit)1314 int http_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
1315 {
1316 /*
1317 * We will analyze a complete HTTP response to check the its syntax.
1318 *
1319 * Once the start line and all headers are received, we may perform a
1320 * capture of the error (if any), and we will set a few fields. We also
1321 * logging and finally headers capture.
1322 */
1323 struct session *sess = s->sess;
1324 struct http_txn *txn = s->txn;
1325 struct http_msg *msg = &txn->rsp;
1326 struct htx *htx;
1327 struct stream_interface *si_b = &s->si[1];
1328 struct connection *srv_conn;
1329 struct htx_sl *sl;
1330 int n;
1331
1332 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
1333
1334 htx = htxbuf(&rep->buf);
1335
1336 /* Parsing errors are caught here */
1337 if (htx->flags & HTX_FL_PARSING_ERROR)
1338 goto return_bad_res;
1339 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1340 goto return_int_err;
1341
1342 /*
1343 * Now we quickly check if we have found a full valid response.
1344 * If not so, we check the FD and buffer states before leaving.
1345 * A full response is indicated by the fact that we have seen
1346 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
1347 * responses are checked first.
1348 *
1349 * Depending on whether the client is still there or not, we
1350 * may send an error response back or not. Note that normally
1351 * we should only check for HTTP status there, and check I/O
1352 * errors somewhere else.
1353 */
1354 next_one:
1355 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
1356 /* 1: have we encountered a read error ? */
1357 if (rep->flags & CF_READ_ERROR) {
1358 struct connection *conn = NULL;
1359
1360 if (objt_cs(s->si[1].end))
1361 conn = __objt_cs(s->si[1].end)->conn;
1362
1363 /* Perform a L7 retry because server refuses the early data. */
1364 if ((si_b->flags & SI_FL_L7_RETRY) &&
1365 (s->be->retry_type & PR_RE_EARLY_ERROR) &&
1366 conn && conn->err_code == CO_ER_SSL_EARLY_FAILED &&
1367 do_l7_retry(s, si_b) == 0) {
1368 DBG_TRACE_DEVEL("leaving on L7 retry",
1369 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1370 return 0;
1371 }
1372
1373 if (txn->flags & TX_NOT_FIRST)
1374 goto abort_keep_alive;
1375
1376 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
1377 if (objt_server(s->target)) {
1378 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
1379 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
1380 }
1381
1382 /* if the server refused the early data, just send a 425 */
1383 if (conn && conn->err_code == CO_ER_SSL_EARLY_FAILED)
1384 txn->status = 425;
1385 else {
1386 txn->status = 502;
1387 stream_inc_http_fail_ctr(s);
1388 }
1389
1390 s->si[1].flags |= SI_FL_NOLINGER;
1391 http_reply_and_close(s, txn->status, http_error_message(s));
1392
1393 if (!(s->flags & SF_ERR_MASK))
1394 s->flags |= SF_ERR_SRVCL;
1395 if (!(s->flags & SF_FINST_MASK))
1396 s->flags |= SF_FINST_H;
1397 DBG_TRACE_DEVEL("leaving on error",
1398 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1399 return 0;
1400 }
1401
1402 /* 2: read timeout : return a 504 to the client. */
1403 else if (rep->flags & CF_READ_TIMEOUT) {
1404 if ((si_b->flags & SI_FL_L7_RETRY) &&
1405 (s->be->retry_type & PR_RE_TIMEOUT)) {
1406 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1407 DBG_TRACE_DEVEL("leaving on L7 retry",
1408 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1409 return 0;
1410 }
1411 }
1412 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
1413 if (objt_server(s->target)) {
1414 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
1415 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
1416 }
1417
1418 txn->status = 504;
1419 stream_inc_http_fail_ctr(s);
1420 s->si[1].flags |= SI_FL_NOLINGER;
1421 http_reply_and_close(s, txn->status, http_error_message(s));
1422
1423 if (!(s->flags & SF_ERR_MASK))
1424 s->flags |= SF_ERR_SRVTO;
1425 if (!(s->flags & SF_FINST_MASK))
1426 s->flags |= SF_FINST_H;
1427 DBG_TRACE_DEVEL("leaving on error",
1428 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1429 return 0;
1430 }
1431
1432 /* 3: client abort with an abortonclose */
1433 else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
1434 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
1435 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
1436 if (sess->listener && sess->listener->counters)
1437 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
1438 if (objt_server(s->target))
1439 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
1440
1441 txn->status = 400;
1442 http_reply_and_close(s, txn->status, http_error_message(s));
1443
1444 if (!(s->flags & SF_ERR_MASK))
1445 s->flags |= SF_ERR_CLICL;
1446 if (!(s->flags & SF_FINST_MASK))
1447 s->flags |= SF_FINST_H;
1448
1449 /* process_stream() will take care of the error */
1450 DBG_TRACE_DEVEL("leaving on error",
1451 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1452 return 0;
1453 }
1454
1455 /* 4: close from server, capture the response if the server has started to respond */
1456 else if (rep->flags & CF_SHUTR) {
1457 if ((si_b->flags & SI_FL_L7_RETRY) &&
1458 (s->be->retry_type & PR_RE_DISCONNECTED)) {
1459 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1460 DBG_TRACE_DEVEL("leaving on L7 retry",
1461 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1462 return 0;
1463 }
1464 }
1465
1466 if (txn->flags & TX_NOT_FIRST)
1467 goto abort_keep_alive;
1468
1469 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
1470 if (objt_server(s->target)) {
1471 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
1472 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
1473 }
1474
1475 txn->status = 502;
1476 stream_inc_http_fail_ctr(s);
1477 s->si[1].flags |= SI_FL_NOLINGER;
1478 http_reply_and_close(s, txn->status, http_error_message(s));
1479
1480 if (!(s->flags & SF_ERR_MASK))
1481 s->flags |= SF_ERR_SRVCL;
1482 if (!(s->flags & SF_FINST_MASK))
1483 s->flags |= SF_FINST_H;
1484 DBG_TRACE_DEVEL("leaving on error",
1485 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1486 return 0;
1487 }
1488
1489 /* 5: write error to client (we don't send any message then) */
1490 else if (rep->flags & CF_WRITE_ERROR) {
1491 if (txn->flags & TX_NOT_FIRST)
1492 goto abort_keep_alive;
1493
1494 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
1495 if (objt_server(s->target))
1496 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
1497 rep->analysers &= AN_RES_FLT_END;
1498
1499 if (!(s->flags & SF_ERR_MASK))
1500 s->flags |= SF_ERR_CLICL;
1501 if (!(s->flags & SF_FINST_MASK))
1502 s->flags |= SF_FINST_H;
1503
1504 /* process_stream() will take care of the error */
1505 DBG_TRACE_DEVEL("leaving on error",
1506 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1507 return 0;
1508 }
1509
1510 channel_dont_close(rep);
1511 rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
1512 DBG_TRACE_DEVEL("waiting for more data",
1513 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1514 return 0;
1515 }
1516
1517 /* More interesting part now : we know that we have a complete
1518 * response which at least looks like HTTP. We have an indicator
1519 * of each header's length, so we can parse them quickly.
1520 */
1521 BUG_ON(htx_get_first_type(htx) != HTX_BLK_RES_SL);
1522 sl = http_get_stline(htx);
1523
1524 /* Perform a L7 retry because of the status code */
1525 if ((si_b->flags & SI_FL_L7_RETRY) &&
1526 l7_status_match(s->be, sl->info.res.status) &&
1527 do_l7_retry(s, si_b) == 0) {
1528 DBG_TRACE_DEVEL("leaving on L7 retry", STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1529 return 0;
1530 }
1531
1532 /* Now, L7 buffer is useless, it can be released */
1533 b_free(&s->si[1].l7_buffer);
1534
1535 msg->msg_state = HTTP_MSG_BODY;
1536
1537
1538 /* 0: we might have to print this header in debug mode */
1539 if (unlikely((global.mode & MODE_DEBUG) &&
1540 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
1541 int32_t pos;
1542
1543 http_debug_stline("srvrep", s, sl);
1544
1545 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
1546 struct htx_blk *blk = htx_get_blk(htx, pos);
1547 enum htx_blk_type type = htx_get_blk_type(blk);
1548
1549 if (type == HTX_BLK_EOH)
1550 break;
1551 if (type != HTX_BLK_HDR)
1552 continue;
1553
1554 http_debug_hdr("srvhdr", s,
1555 htx_get_blk_name(htx, blk),
1556 htx_get_blk_value(htx, blk));
1557 }
1558 }
1559
1560 /* 1: get the status code and the version. Also set HTTP flags */
1561 txn->status = sl->info.res.status;
1562 if (sl->flags & HTX_SL_F_VER_11)
1563 msg->flags |= HTTP_MSGF_VER_11;
1564 if (sl->flags & HTX_SL_F_XFER_LEN) {
1565 msg->flags |= HTTP_MSGF_XFER_LEN;
1566 if (sl->flags & HTX_SL_F_CLEN)
1567 msg->flags |= HTTP_MSGF_CNT_LEN;
1568 else if (sl->flags & HTX_SL_F_CHNK)
1569 msg->flags |= HTTP_MSGF_TE_CHNK;
1570 }
1571 if (sl->flags & HTX_SL_F_BODYLESS)
1572 msg->flags |= HTTP_MSGF_BODYLESS;
1573 if (sl->flags & HTX_SL_F_CONN_UPG)
1574 msg->flags |= HTTP_MSGF_CONN_UPG;
1575
1576 n = txn->status / 100;
1577 if (n < 1 || n > 5)
1578 n = 0;
1579
1580 /* when the client triggers a 4xx from the server, it's most often due
1581 * to a missing object or permission. These events should be tracked
1582 * because if they happen often, it may indicate a brute force or a
1583 * vulnerability scan.
1584 */
1585 if (n == 4)
1586 stream_inc_http_err_ctr(s);
1587
1588 if (n == 5 && txn->status != 501 && txn->status != 505)
1589 stream_inc_http_fail_ctr(s);
1590
1591 if (objt_server(s->target)) {
1592 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.p.http.rsp[n]);
1593 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.p.http.cum_req);
1594 }
1595
1596 /* Adjust server's health based on status code. Note: status codes 501
1597 * and 505 are triggered on demand by client request, so we must not
1598 * count them as server failures.
1599 */
1600 if (objt_server(s->target)) {
1601 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
1602 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
1603 else
1604 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
1605 }
1606
1607 /*
1608 * We may be facing a 100-continue response, or any other informational
1609 * 1xx response which is non-final, in which case this is not the right
1610 * response, and we're waiting for the next one. Let's allow this response
1611 * to go to the client and wait for the next one. There's an exception for
1612 * 101 which is used later in the code to switch protocols.
1613 */
1614 if (txn->status < 200 &&
1615 (txn->status == 100 || txn->status >= 102)) {
1616 FLT_STRM_CB(s, flt_http_reset(s, msg));
1617 htx->first = channel_htx_fwd_headers(rep, htx);
1618 msg->msg_state = HTTP_MSG_RPBEFORE;
1619 msg->flags = 0;
1620 txn->status = 0;
1621 s->logs.t_data = -1; /* was not a response yet */
1622 rep->flags |= CF_SEND_DONTWAIT; /* Send ASAP informational messages */
1623 goto next_one;
1624 }
1625
1626 /* A 101-switching-protocols must contains a Connection header with the
1627 * "upgrade" option and the request too. It means both are agree to
1628 * upgrade. It is not so strict because there is no test on the Upgrade
1629 * header content. But it is probably stronger enough for now.
1630 */
1631 if (txn->status == 101 &&
1632 (!(txn->req.flags & HTTP_MSGF_CONN_UPG) || !(txn->rsp.flags & HTTP_MSGF_CONN_UPG)))
1633 goto return_bad_res;
1634
1635 /*
1636 * 2: check for cacheability.
1637 */
1638
1639 switch (txn->status) {
1640 case 200:
1641 case 203:
1642 case 204:
1643 case 206:
1644 case 300:
1645 case 301:
1646 case 404:
1647 case 405:
1648 case 410:
1649 case 414:
1650 case 501:
1651 break;
1652 default:
1653 /* RFC7231#6.1:
1654 * Responses with status codes that are defined as
1655 * cacheable by default (e.g., 200, 203, 204, 206,
1656 * 300, 301, 404, 405, 410, 414, and 501 in this
1657 * specification) can be reused by a cache with
1658 * heuristic expiration unless otherwise indicated
1659 * by the method definition or explicit cache
1660 * controls [RFC7234]; all other status codes are
1661 * not cacheable by default.
1662 */
1663 txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
1664 break;
1665 }
1666
1667 /*
1668 * 3: we may need to capture headers
1669 */
1670 s->logs.logwait &= ~LW_RESP;
1671 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
1672 http_capture_headers(htx, s->res_cap, sess->fe->rsp_cap);
1673
1674 /* Skip parsing if no content length is possible. */
1675 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) ||
1676 txn->status == 101)) {
1677 /* Either we've established an explicit tunnel, or we're
1678 * switching the protocol. In both cases, we're very unlikely
1679 * to understand the next protocols. We have to switch to tunnel
1680 * mode, so that we transfer the request and responses then let
1681 * this protocol pass unmodified. When we later implement specific
1682 * parsers for such protocols, we'll want to check the Upgrade
1683 * header which contains information about that protocol for
1684 * responses with status 101 (eg: see RFC2817 about TLS).
1685 */
1686 txn->flags |= TX_CON_WANT_TUN;
1687 }
1688
1689 /* check for NTML authentication headers in 401 (WWW-Authenticate) and
1690 * 407 (Proxy-Authenticate) responses and set the connection to private
1691 */
1692 srv_conn = cs_conn(objt_cs(s->si[1].end));
1693 if (srv_conn) {
1694 struct ist hdr;
1695 struct http_hdr_ctx ctx;
1696
1697 if (txn->status == 401)
1698 hdr = ist("WWW-Authenticate");
1699 else if (txn->status == 407)
1700 hdr = ist("Proxy-Authenticate");
1701 else
1702 goto end;
1703
1704 ctx.blk = NULL;
1705 while (http_find_header(htx, hdr, &ctx, 0)) {
1706 /* If www-authenticate contains "Negotiate", "Nego2", or "NTLM",
1707 * possibly followed by blanks and a base64 string, the connection
1708 * is private. Since it's a mess to deal with, we only check for
1709 * values starting with "NTLM" or "Nego". Note that often multiple
1710 * headers are sent by the server there.
1711 */
1712 if ((ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "Nego", 4) == 0) ||
1713 (ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "NTLM", 4) == 0)) {
1714 sess->flags |= SESS_FL_PREFER_LAST;
1715 conn_set_owner(srv_conn, sess, NULL);
1716 conn_set_private(srv_conn);
1717 /* If it fail now, the same will be done in mux->detach() callback */
1718 session_add_conn(srv_conn->owner, srv_conn, srv_conn->target);
1719 break;
1720 }
1721 }
1722 }
1723
1724 end:
1725 /* we want to have the response time before we start processing it */
1726 s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
1727
1728 /* end of job, return OK */
1729 rep->analysers &= ~an_bit;
1730 rep->analyse_exp = TICK_ETERNITY;
1731 channel_auto_close(rep);
1732 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1733 return 1;
1734
1735 return_int_err:
1736 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
1737 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
1738 if (sess->listener && sess->listener->counters)
1739 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
1740 if (objt_server(s->target))
1741 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
1742 txn->status = 500;
1743 if (!(s->flags & SF_ERR_MASK))
1744 s->flags |= SF_ERR_INTERNAL;
1745 goto return_prx_cond;
1746
1747 return_bad_res:
1748 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
1749 if (objt_server(s->target)) {
1750 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
1751 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
1752 }
1753 if ((s->be->retry_type & PR_RE_JUNK_REQUEST) &&
1754 (si_b->flags & SI_FL_L7_RETRY) &&
1755 do_l7_retry(s, si_b) == 0) {
1756 DBG_TRACE_DEVEL("leaving on L7 retry",
1757 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1758 return 0;
1759 }
1760 txn->status = 502;
1761 stream_inc_http_fail_ctr(s);
1762 /* fall through */
1763
1764 return_prx_cond:
1765 http_reply_and_close(s, txn->status, http_error_message(s));
1766
1767 if (!(s->flags & SF_ERR_MASK))
1768 s->flags |= SF_ERR_PRXCOND;
1769 if (!(s->flags & SF_FINST_MASK))
1770 s->flags |= SF_FINST_H;
1771
1772 s->si[1].flags |= SI_FL_NOLINGER;
1773 DBG_TRACE_DEVEL("leaving on error",
1774 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
1775 return 0;
1776
1777 abort_keep_alive:
1778 /* A keep-alive request to the server failed on a network error.
1779 * The client is required to retry. We need to close without returning
1780 * any other information so that the client retries.
1781 */
1782 txn->status = 0;
1783 s->logs.logwait = 0;
1784 s->logs.level = 0;
1785 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
1786 http_reply_and_close(s, txn->status, NULL);
1787 DBG_TRACE_DEVEL("leaving by closing K/A connection",
1788 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1789 return 0;
1790 }
1791
1792 /* This function performs all the processing enabled for the current response.
1793 * It normally returns 1 unless it wants to break. It relies on buffers flags,
1794 * and updates s->res.analysers. It might make sense to explode it into several
1795 * other functions. It works like process_request (see indications above).
1796 */
http_process_res_common(struct stream * s,struct channel * rep,int an_bit,struct proxy * px)1797 int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
1798 {
1799 struct session *sess = s->sess;
1800 struct http_txn *txn = s->txn;
1801 struct http_msg *msg = &txn->rsp;
1802 struct htx *htx;
1803 struct proxy *cur_proxy;
1804 enum rule_result ret = HTTP_RULE_RES_CONT;
1805
1806 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
1807 return 0;
1808
1809 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
1810
1811 htx = htxbuf(&rep->buf);
1812
1813 /* The stats applet needs to adjust the Connection header but we don't
1814 * apply any filter there.
1815 */
1816 if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
1817 rep->analysers &= ~an_bit;
1818 rep->analyse_exp = TICK_ETERNITY;
1819 goto end;
1820 }
1821
1822 /*
1823 * We will have to evaluate the filters.
1824 * As opposed to version 1.2, now they will be evaluated in the
1825 * filters order and not in the header order. This means that
1826 * each filter has to be validated among all headers.
1827 *
1828 * Filters are tried with ->be first, then with ->fe if it is
1829 * different from ->be.
1830 *
1831 * Maybe we are in resume condiion. In this case I choose the
1832 * "struct proxy" which contains the rule list matching the resume
1833 * pointer. If none of these "struct proxy" match, I initialise
1834 * the process with the first one.
1835 *
1836 * In fact, I check only correspondence between the current list
1837 * pointer and the ->fe rule list. If it doesn't match, I initialize
1838 * the loop with the ->be.
1839 */
1840 if (s->current_rule_list == &sess->fe->http_res_rules)
1841 cur_proxy = sess->fe;
1842 else
1843 cur_proxy = s->be;
1844 while (1) {
1845 /* evaluate http-response rules */
1846 if (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) {
1847 ret = http_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
1848
1849 switch (ret) {
1850 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
1851 goto return_prx_yield;
1852
1853 case HTTP_RULE_RES_CONT:
1854 case HTTP_RULE_RES_STOP: /* nothing to do */
1855 break;
1856
1857 case HTTP_RULE_RES_DENY: /* deny or tarpit */
1858 goto deny;
1859
1860 case HTTP_RULE_RES_ABRT: /* abort request, response already sent */
1861 goto return_prx_cond;
1862
1863 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
1864 goto done;
1865
1866 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
1867 goto return_bad_res;
1868
1869 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
1870 goto return_int_err;
1871 }
1872
1873 }
1874
1875 /* check whether we're already working on the frontend */
1876 if (cur_proxy == sess->fe)
1877 break;
1878 cur_proxy = sess->fe;
1879 }
1880
1881 /* OK that's all we can do for 1xx responses */
1882 if (unlikely(txn->status < 200 && txn->status != 101))
1883 goto end;
1884
1885 /*
1886 * Now check for a server cookie.
1887 */
1888 if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
1889 http_manage_server_side_cookies(s, rep);
1890
1891 /*
1892 * Check for cache-control or pragma headers if required.
1893 */
1894 if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
1895 http_check_response_for_cacheability(s, rep);
1896
1897 /*
1898 * Add server cookie in the response if needed
1899 */
1900 if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
1901 !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
1902 (!(s->flags & SF_DIRECT) ||
1903 ((s->be->cookie_maxidle || txn->cookie_last_date) &&
1904 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
1905 (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
1906 (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
1907 (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
1908 !(s->flags & SF_IGNORE_PRST)) {
1909 /* the server is known, it's not the one the client requested, or the
1910 * cookie's last seen date needs to be refreshed. We have to
1911 * insert a set-cookie here, except if we want to insert only on POST
1912 * requests and this one isn't. Note that servers which don't have cookies
1913 * (eg: some backup servers) will return a full cookie removal request.
1914 */
1915 if (!__objt_server(s->target)->cookie) {
1916 chunk_printf(&trash,
1917 "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
1918 s->be->cookie_name);
1919 }
1920 else {
1921 chunk_printf(&trash, "%s=%s", s->be->cookie_name, __objt_server(s->target)->cookie);
1922
1923 if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
1924 /* emit last_date, which is mandatory */
1925 trash.area[trash.data++] = COOKIE_DELIM_DATE;
1926 s30tob64((date.tv_sec+3) >> 2,
1927 trash.area + trash.data);
1928 trash.data += 5;
1929
1930 if (s->be->cookie_maxlife) {
1931 /* emit first_date, which is either the original one or
1932 * the current date.
1933 */
1934 trash.area[trash.data++] = COOKIE_DELIM_DATE;
1935 s30tob64(txn->cookie_first_date ?
1936 txn->cookie_first_date >> 2 :
1937 (date.tv_sec+3) >> 2,
1938 trash.area + trash.data);
1939 trash.data += 5;
1940 }
1941 }
1942 chunk_appendf(&trash, "; path=/");
1943 }
1944
1945 if (s->be->cookie_domain)
1946 chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
1947
1948 if (s->be->ck_opts & PR_CK_HTTPONLY)
1949 chunk_appendf(&trash, "; HttpOnly");
1950
1951 if (s->be->ck_opts & PR_CK_SECURE)
1952 chunk_appendf(&trash, "; Secure");
1953
1954 if (s->be->cookie_attrs)
1955 chunk_appendf(&trash, "; %s", s->be->cookie_attrs);
1956
1957 if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data))))
1958 goto return_int_err;
1959
1960 txn->flags &= ~TX_SCK_MASK;
1961 if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
1962 /* the server did not change, only the date was updated */
1963 txn->flags |= TX_SCK_UPDATED;
1964 else
1965 txn->flags |= TX_SCK_INSERTED;
1966
1967 /* Here, we will tell an eventual cache on the client side that we don't
1968 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
1969 * Some caches understand the correct form: 'no-cache="set-cookie"', but
1970 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
1971 */
1972 if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
1973
1974 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
1975
1976 if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private"))))
1977 goto return_int_err;
1978 }
1979 }
1980
1981 /*
1982 * Check if result will be cacheable with a cookie.
1983 * We'll block the response if security checks have caught
1984 * nasty things such as a cacheable cookie.
1985 */
1986 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
1987 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
1988 (s->be->options & PR_O_CHK_CACHE)) {
1989 /* we're in presence of a cacheable response containing
1990 * a set-cookie header. We'll block it as requested by
1991 * the 'checkcache' option, and send an alert.
1992 */
1993 ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
1994 s->be->id, objt_server(s->target) ? __objt_server(s->target)->id : "<dispatch>");
1995 send_log(s->be, LOG_ALERT,
1996 "Blocking cacheable cookie in response from instance %s, server %s.\n",
1997 s->be->id, objt_server(s->target) ? __objt_server(s->target)->id : "<dispatch>");
1998 goto deny;
1999 }
2000
2001 end:
2002 /*
2003 * Evaluate after-response rules before forwarding the response. rules
2004 * from the backend are evaluated first, then one from the frontend if
2005 * it differs.
2006 */
2007 if (!http_eval_after_res_rules(s))
2008 goto return_int_err;
2009
2010 /* Filter the response headers if there are filters attached to the
2011 * stream.
2012 */
2013 if (HAS_FILTERS(s))
2014 rep->analysers |= AN_RES_FLT_HTTP_HDRS;
2015
2016 /* Always enter in the body analyzer */
2017 rep->analysers &= ~AN_RES_FLT_XFER_DATA;
2018 rep->analysers |= AN_RES_HTTP_XFER_BODY;
2019
2020 /* if the user wants to log as soon as possible, without counting
2021 * bytes from the server, then this is the right moment. We have
2022 * to temporarily assign bytes_out to log what we currently have.
2023 */
2024 if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
2025 s->logs.t_close = s->logs.t_data; /* to get a valid end date */
2026 s->logs.bytes_out = htx->data;
2027 s->do_log(s);
2028 s->logs.bytes_out = 0;
2029 }
2030
2031 done:
2032 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2033 rep->analysers &= ~an_bit;
2034 rep->analyse_exp = TICK_ETERNITY;
2035 return 1;
2036
2037 deny:
2038 _HA_ATOMIC_INC(&sess->fe->fe_counters.denied_resp);
2039 _HA_ATOMIC_INC(&s->be->be_counters.denied_resp);
2040 if (sess->listener && sess->listener->counters)
2041 _HA_ATOMIC_INC(&sess->listener->counters->denied_resp);
2042 if (objt_server(s->target))
2043 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.denied_resp);
2044 goto return_prx_err;
2045
2046 return_int_err:
2047 txn->status = 500;
2048 if (!(s->flags & SF_ERR_MASK))
2049 s->flags |= SF_ERR_INTERNAL;
2050 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
2051 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
2052 if (sess->listener && sess->listener->counters)
2053 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
2054 if (objt_server(s->target))
2055 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
2056 goto return_prx_err;
2057
2058 return_bad_res:
2059 txn->status = 502;
2060 stream_inc_http_fail_ctr(s);
2061 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
2062 if (objt_server(s->target)) {
2063 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
2064 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2065 }
2066 /* fall through */
2067
2068 return_prx_err:
2069 http_reply_and_close(s, txn->status, http_error_message(s));
2070 /* fall through */
2071
2072 return_prx_cond:
2073 s->logs.t_data = -1; /* was not a valid response */
2074 s->si[1].flags |= SI_FL_NOLINGER;
2075
2076 if (!(s->flags & SF_ERR_MASK))
2077 s->flags |= SF_ERR_PRXCOND;
2078 if (!(s->flags & SF_FINST_MASK))
2079 s->flags |= SF_FINST_H;
2080
2081 rep->analysers &= AN_RES_FLT_END;
2082 s->req.analysers &= AN_REQ_FLT_END;
2083 rep->analyse_exp = TICK_ETERNITY;
2084 DBG_TRACE_DEVEL("leaving on error",
2085 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
2086 return 0;
2087
2088 return_prx_yield:
2089 channel_dont_close(rep);
2090 DBG_TRACE_DEVEL("waiting for more data",
2091 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2092 return 0;
2093 }
2094
2095 /* This function is an analyser which forwards response body (including chunk
2096 * sizes if any). It is called as soon as we must forward, even if we forward
2097 * zero byte. The only situation where it must not be called is when we're in
2098 * tunnel mode and we want to forward till the close. It's used both to forward
2099 * remaining data and to resync after end of body. It expects the msg_state to
2100 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
2101 * read more data, or 1 once we can go on with next request or end the stream.
2102 *
2103 * It is capable of compressing response data both in content-length mode and
2104 * in chunked mode. The state machines follows different flows depending on
2105 * whether content-length and chunked modes are used, since there are no
2106 * trailers in content-length :
2107 *
2108 * chk-mode cl-mode
2109 * ,----- BODY -----.
2110 * / \
2111 * V size > 0 V chk-mode
2112 * .--> SIZE -------------> DATA -------------> CRLF
2113 * | | size == 0 | last byte |
2114 * | v final crlf v inspected |
2115 * | TRAILERS -----------> DONE |
2116 * | |
2117 * `----------------------------------------------'
2118 *
2119 * Compression only happens in the DATA state, and must be flushed in final
2120 * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
2121 * is performed at once on final states for all bytes parsed, or when leaving
2122 * on missing data.
2123 */
http_response_forward_body(struct stream * s,struct channel * res,int an_bit)2124 int http_response_forward_body(struct stream *s, struct channel *res, int an_bit)
2125 {
2126 struct session *sess = s->sess;
2127 struct http_txn *txn = s->txn;
2128 struct http_msg *msg = &s->txn->rsp;
2129 struct htx *htx;
2130 int ret;
2131
2132 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
2133
2134 htx = htxbuf(&res->buf);
2135
2136 if (htx->flags & HTX_FL_PARSING_ERROR)
2137 goto return_bad_res;
2138 if (htx->flags & HTX_FL_PROCESSING_ERROR)
2139 goto return_int_err;
2140
2141 if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
2142 ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) {
2143 /* Output closed while we were sending data. We must abort and
2144 * wake the other side up.
2145 */
2146 msg->msg_state = HTTP_MSG_ERROR;
2147 http_end_response(s);
2148 http_end_request(s);
2149 DBG_TRACE_DEVEL("leaving on error",
2150 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
2151 return 1;
2152 }
2153
2154 if (msg->msg_state == HTTP_MSG_BODY)
2155 msg->msg_state = HTTP_MSG_DATA;
2156
2157 /* in most states, we should abort in case of early close */
2158 channel_auto_close(res);
2159
2160 if (res->to_forward) {
2161 if (res->to_forward == CHN_INFINITE_FORWARD) {
2162 if (res->flags & CF_EOI)
2163 msg->msg_state = HTTP_MSG_ENDING;
2164 }
2165 else {
2166 /* We can't process the buffer's contents yet */
2167 res->flags |= CF_WAKE_WRITE;
2168 goto missing_data_or_waiting;
2169 }
2170 }
2171
2172 if (msg->msg_state >= HTTP_MSG_ENDING)
2173 goto ending;
2174
2175 if ((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) || txn->status == 101 ||
2176 (!(msg->flags & HTTP_MSGF_XFER_LEN) && !HAS_RSP_DATA_FILTERS(s))) {
2177 msg->msg_state = HTTP_MSG_ENDING;
2178 goto ending;
2179 }
2180
2181 /* Forward input data. We get it by removing all outgoing data not
2182 * forwarded yet from HTX data size. If there are some data filters, we
2183 * let them decide the amount of data to forward.
2184 */
2185 if (HAS_RSP_DATA_FILTERS(s)) {
2186 ret = flt_http_payload(s, msg, htx->data);
2187 if (ret < 0)
2188 goto return_bad_res;
2189 c_adv(res, ret);
2190 }
2191 else {
2192 c_adv(res, htx->data - co_data(res));
2193 if (msg->flags & HTTP_MSGF_XFER_LEN)
2194 channel_htx_forward_forever(res, htx);
2195 }
2196
2197 if (htx->data != co_data(res))
2198 goto missing_data_or_waiting;
2199
2200 if (!(msg->flags & HTTP_MSGF_XFER_LEN) && res->flags & CF_SHUTR) {
2201 msg->msg_state = HTTP_MSG_ENDING;
2202 goto ending;
2203 }
2204
2205 /* Check if the end-of-message is reached and if so, switch the message
2206 * in HTTP_MSG_ENDING state. Then if all data was marked to be
2207 * forwarded, set the state to HTTP_MSG_DONE.
2208 */
2209 if (!(htx->flags & HTX_FL_EOM))
2210 goto missing_data_or_waiting;
2211
2212 msg->msg_state = HTTP_MSG_ENDING;
2213
2214 ending:
2215 res->flags &= ~CF_EXPECT_MORE; /* no more data are expected */
2216
2217 /* other states, ENDING...TUNNEL */
2218 if (msg->msg_state >= HTTP_MSG_DONE)
2219 goto done;
2220
2221 if (HAS_RSP_DATA_FILTERS(s)) {
2222 ret = flt_http_end(s, msg);
2223 if (ret <= 0) {
2224 if (!ret)
2225 goto missing_data_or_waiting;
2226 goto return_bad_res;
2227 }
2228 }
2229
2230 if ((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) || txn->status == 101 ||
2231 !(msg->flags & HTTP_MSGF_XFER_LEN)) {
2232 msg->msg_state = HTTP_MSG_TUNNEL;
2233 goto ending;
2234 }
2235 else {
2236 msg->msg_state = HTTP_MSG_DONE;
2237 res->to_forward = 0;
2238 }
2239
2240 done:
2241
2242 channel_dont_close(res);
2243
2244 http_end_response(s);
2245 if (!(res->analysers & an_bit)) {
2246 http_end_request(s);
2247 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2248 if (res->flags & CF_SHUTW) {
2249 /* response errors are most likely due to the
2250 * client aborting the transfer. */
2251 goto return_cli_abort;
2252 }
2253 goto return_bad_res;
2254 }
2255 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2256 return 1;
2257 }
2258 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
2259 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2260 return 0;
2261
2262 missing_data_or_waiting:
2263 if (res->flags & CF_SHUTW)
2264 goto return_cli_abort;
2265
2266 /* stop waiting for data if the input is closed before the end. If the
2267 * client side was already closed, it means that the client has aborted,
2268 * so we don't want to count this as a server abort. Otherwise it's a
2269 * server abort.
2270 */
2271 if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) {
2272 if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
2273 goto return_cli_abort;
2274 /* If we have some pending data, we continue the processing */
2275 if (htx_is_empty(htx))
2276 goto return_srv_abort;
2277 }
2278
2279 /* When TE: chunked is used, we need to get there again to parse
2280 * remaining chunks even if the server has closed, so we don't want to
2281 * set CF_DONTCLOSE. Similarly when there is a content-leng or if there
2282 * are filters registered on the stream, we don't want to forward a
2283 * close
2284 */
2285 if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s))
2286 channel_dont_close(res);
2287
2288 /* We know that more data are expected, but we couldn't send more that
2289 * what we did. So we always set the CF_EXPECT_MORE flag so that the
2290 * system knows it must not set a PUSH on this first part. Interactive
2291 * modes are already handled by the stream sock layer. We must not do
2292 * this in content-length mode because it could present the MSG_MORE
2293 * flag with the last block of forwarded data, which would cause an
2294 * additional delay to be observed by the receiver.
2295 */
2296 if (HAS_RSP_DATA_FILTERS(s))
2297 res->flags |= CF_EXPECT_MORE;
2298
2299 /* the stream handler will take care of timeouts and errors */
2300 DBG_TRACE_DEVEL("waiting for more data to forward",
2301 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2302 return 0;
2303
2304 return_srv_abort:
2305 _HA_ATOMIC_INC(&sess->fe->fe_counters.srv_aborts);
2306 _HA_ATOMIC_INC(&s->be->be_counters.srv_aborts);
2307 if (sess->listener && sess->listener->counters)
2308 _HA_ATOMIC_INC(&sess->listener->counters->srv_aborts);
2309 if (objt_server(s->target))
2310 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.srv_aborts);
2311 stream_inc_http_fail_ctr(s);
2312 if (!(s->flags & SF_ERR_MASK))
2313 s->flags |= SF_ERR_SRVCL;
2314 goto return_error;
2315
2316 return_cli_abort:
2317 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
2318 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
2319 if (sess->listener && sess->listener->counters)
2320 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
2321 if (objt_server(s->target))
2322 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
2323 if (!(s->flags & SF_ERR_MASK))
2324 s->flags |= SF_ERR_CLICL;
2325 goto return_error;
2326
2327 return_int_err:
2328 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
2329 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
2330 if (sess->listener && sess->listener->counters)
2331 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
2332 if (objt_server(s->target))
2333 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
2334 if (!(s->flags & SF_ERR_MASK))
2335 s->flags |= SF_ERR_INTERNAL;
2336 goto return_error;
2337
2338 return_bad_res:
2339 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
2340 if (objt_server(s->target)) {
2341 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
2342 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2343 }
2344 stream_inc_http_fail_ctr(s);
2345 if (!(s->flags & SF_ERR_MASK))
2346 s->flags |= SF_ERR_SRVCL;
2347 /* fall through */
2348
2349 return_error:
2350 /* don't send any error message as we're in the body */
2351 http_reply_and_close(s, txn->status, NULL);
2352 if (!(s->flags & SF_FINST_MASK))
2353 s->flags |= SF_FINST_D;
2354 DBG_TRACE_DEVEL("leaving on error",
2355 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
2356 return 0;
2357 }
2358
2359 /* Perform an HTTP redirect based on the information in <rule>. The function
2360 * returns zero on success, or zero in case of a, irrecoverable error such
2361 * as too large a request to build a valid response.
2362 */
http_apply_redirect_rule(struct redirect_rule * rule,struct stream * s,struct http_txn * txn)2363 int http_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
2364 {
2365 struct channel *req = &s->req;
2366 struct channel *res = &s->res;
2367 struct htx *htx;
2368 struct htx_sl *sl;
2369 struct buffer *chunk;
2370 struct ist status, reason, location;
2371 unsigned int flags;
2372 int close = 0; /* Try to keep the connection alive byt default */
2373
2374 chunk = alloc_trash_chunk();
2375 if (!chunk) {
2376 if (!(s->flags & SF_ERR_MASK))
2377 s->flags |= SF_ERR_RESOURCE;
2378 goto fail;
2379 }
2380
2381 /*
2382 * Create the location
2383 */
2384 htx = htxbuf(&req->buf);
2385 switch(rule->type) {
2386 case REDIRECT_TYPE_SCHEME: {
2387 struct http_hdr_ctx ctx;
2388 struct ist path, host;
2389
2390 host = ist("");
2391 ctx.blk = NULL;
2392 if (http_find_header(htx, ist("Host"), &ctx, 0))
2393 host = ctx.value;
2394
2395 sl = http_get_stline(htx);
2396 path = http_get_path(htx_sl_req_uri(sl));
2397 /* build message using path */
2398 if (isttest(path)) {
2399 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2400 int qs = 0;
2401 while (qs < path.len) {
2402 if (*(path.ptr + qs) == '?') {
2403 path.len = qs;
2404 break;
2405 }
2406 qs++;
2407 }
2408 }
2409 }
2410 else
2411 path = ist("/");
2412
2413 if (rule->rdr_str) { /* this is an old "redirect" rule */
2414 /* add scheme */
2415 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2416 goto fail;
2417 }
2418 else {
2419 /* add scheme with executing log format */
2420 chunk->data += build_logline(s, chunk->area + chunk->data,
2421 chunk->size - chunk->data,
2422 &rule->rdr_fmt);
2423 }
2424 /* add "://" + host + path */
2425 if (!chunk_memcat(chunk, "://", 3) ||
2426 !chunk_memcat(chunk, host.ptr, host.len) ||
2427 !chunk_memcat(chunk, path.ptr, path.len))
2428 goto fail;
2429
2430 /* append a slash at the end of the location if needed and missing */
2431 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2432 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2433 if (chunk->data + 1 >= chunk->size)
2434 goto fail;
2435 chunk->area[chunk->data++] = '/';
2436 }
2437 break;
2438 }
2439
2440 case REDIRECT_TYPE_PREFIX: {
2441 struct ist path;
2442
2443 sl = http_get_stline(htx);
2444 path = http_get_path(htx_sl_req_uri(sl));
2445 /* build message using path */
2446 if (isttest(path)) {
2447 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2448 int qs = 0;
2449 while (qs < path.len) {
2450 if (*(path.ptr + qs) == '?') {
2451 path.len = qs;
2452 break;
2453 }
2454 qs++;
2455 }
2456 }
2457 }
2458 else
2459 path = ist("/");
2460
2461 if (rule->rdr_str) { /* this is an old "redirect" rule */
2462 /* add prefix. Note that if prefix == "/", we don't want to
2463 * add anything, otherwise it makes it hard for the user to
2464 * configure a self-redirection.
2465 */
2466 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
2467 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2468 goto fail;
2469 }
2470 }
2471 else {
2472 /* add prefix with executing log format */
2473 chunk->data += build_logline(s, chunk->area + chunk->data,
2474 chunk->size - chunk->data,
2475 &rule->rdr_fmt);
2476 }
2477
2478 /* add path */
2479 if (!chunk_memcat(chunk, path.ptr, path.len))
2480 goto fail;
2481
2482 /* append a slash at the end of the location if needed and missing */
2483 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2484 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2485 if (chunk->data + 1 >= chunk->size)
2486 goto fail;
2487 chunk->area[chunk->data++] = '/';
2488 }
2489 break;
2490 }
2491 case REDIRECT_TYPE_LOCATION:
2492 default:
2493 if (rule->rdr_str) { /* this is an old "redirect" rule */
2494 /* add location */
2495 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2496 goto fail;
2497 }
2498 else {
2499 /* add location with executing log format */
2500 chunk->data += build_logline(s, chunk->area + chunk->data,
2501 chunk->size - chunk->data,
2502 &rule->rdr_fmt);
2503 }
2504 break;
2505 }
2506 location = ist2(chunk->area, chunk->data);
2507
2508 /*
2509 * Create the 30x response
2510 */
2511 switch (rule->code) {
2512 case 308:
2513 status = ist("308");
2514 reason = ist("Permanent Redirect");
2515 break;
2516 case 307:
2517 status = ist("307");
2518 reason = ist("Temporary Redirect");
2519 break;
2520 case 303:
2521 status = ist("303");
2522 reason = ist("See Other");
2523 break;
2524 case 301:
2525 status = ist("301");
2526 reason = ist("Moved Permanently");
2527 break;
2528 case 302:
2529 default:
2530 status = ist("302");
2531 reason = ist("Found");
2532 break;
2533 }
2534
2535 if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE)
2536 close = 1;
2537
2538 htx = htx_from_buf(&res->buf);
2539 /* Trim any possible response */
2540 channel_htx_truncate(&s->res, htx);
2541 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2542 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason);
2543 if (!sl)
2544 goto fail;
2545 sl->info.res.status = rule->code;
2546 s->txn->status = rule->code;
2547
2548 if (close && !htx_add_header(htx, ist("Connection"), ist("close")))
2549 goto fail;
2550
2551 if (!htx_add_header(htx, ist("Content-length"), ist("0")) ||
2552 !htx_add_header(htx, ist("Location"), location))
2553 goto fail;
2554
2555 if (rule->code == 302 || rule->code == 303 || rule->code == 307) {
2556 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")))
2557 goto fail;
2558 }
2559
2560 if (rule->cookie_len) {
2561 if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len)))
2562 goto fail;
2563 }
2564
2565 if (!htx_add_endof(htx, HTX_BLK_EOH))
2566 goto fail;
2567
2568 htx->flags |= HTX_FL_EOM;
2569 htx_to_buf(htx, &res->buf);
2570 if (!http_forward_proxy_resp(s, 1))
2571 goto fail;
2572
2573 if (rule->flags & REDIRECT_FLAG_FROM_REQ) {
2574 /* let's log the request time */
2575 s->logs.tv_request = now;
2576 req->analysers &= AN_REQ_FLT_END;
2577
2578 if (s->sess->fe == s->be) /* report it if the request was intercepted by the frontend */
2579 _HA_ATOMIC_INC(&s->sess->fe->fe_counters.intercepted_req);
2580 }
2581
2582 if (!(s->flags & SF_ERR_MASK))
2583 s->flags |= SF_ERR_LOCAL;
2584 if (!(s->flags & SF_FINST_MASK))
2585 s->flags |= ((rule->flags & REDIRECT_FLAG_FROM_REQ) ? SF_FINST_R : SF_FINST_H);
2586
2587 free_trash_chunk(chunk);
2588 return 1;
2589
2590 fail:
2591 /* If an error occurred, remove the incomplete HTTP response from the
2592 * buffer */
2593 channel_htx_truncate(res, htxbuf(&res->buf));
2594 free_trash_chunk(chunk);
2595 return 0;
2596 }
2597
2598 /* Replace all headers matching the name <name>. The header value is replaced if
2599 * it matches the regex <re>. <str> is used for the replacement. If <full> is
2600 * set to 1, the full-line is matched and replaced. Otherwise, comma-separated
2601 * values are evaluated one by one. It returns 0 on success and -1 on error.
2602 */
http_replace_hdrs(struct stream * s,struct htx * htx,struct ist name,const char * str,struct my_regex * re,int full)2603 int http_replace_hdrs(struct stream* s, struct htx *htx, struct ist name,
2604 const char *str, struct my_regex *re, int full)
2605 {
2606 struct http_hdr_ctx ctx;
2607 struct buffer *output = get_trash_chunk();
2608
2609 ctx.blk = NULL;
2610 while (http_find_header(htx, name, &ctx, full)) {
2611 if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0))
2612 continue;
2613
2614 output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch);
2615 if (output->data == -1)
2616 return -1;
2617 if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data)))
2618 return -1;
2619 }
2620 return 0;
2621 }
2622
2623 /* This function executes one of the set-{method,path,query,uri} actions. It
2624 * takes the string from the variable 'replace' with length 'len', then modifies
2625 * the relevant part of the request line accordingly. Then it updates various
2626 * pointers to the next elements which were moved, and the total buffer length.
2627 * It finds the action to be performed in p[2], previously filled by function
2628 * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
2629 * error, though this can be revisited when this code is finally exploited.
2630 *
2631 * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
2632 * query string, 3 to replace uri or 4 to replace the path+query.
2633 *
2634 * In query string case, the mark question '?' must be set at the start of the
2635 * string by the caller, event if the replacement query string is empty.
2636 */
http_req_replace_stline(int action,const char * replace,int len,struct proxy * px,struct stream * s)2637 int http_req_replace_stline(int action, const char *replace, int len,
2638 struct proxy *px, struct stream *s)
2639 {
2640 struct htx *htx = htxbuf(&s->req.buf);
2641
2642 switch (action) {
2643 case 0: // method
2644 if (!http_replace_req_meth(htx, ist2(replace, len)))
2645 return -1;
2646 break;
2647
2648 case 1: // path
2649 if (!http_replace_req_path(htx, ist2(replace, len), 0))
2650 return -1;
2651 break;
2652
2653 case 2: // query
2654 if (!http_replace_req_query(htx, ist2(replace, len)))
2655 return -1;
2656 break;
2657
2658 case 3: // uri
2659 if (!http_replace_req_uri(htx, ist2(replace, len)))
2660 return -1;
2661 break;
2662
2663 case 4: // path + query
2664 if (!http_replace_req_path(htx, ist2(replace, len), 1))
2665 return -1;
2666 break;
2667
2668 default:
2669 return -1;
2670 }
2671 return 0;
2672 }
2673
2674 /* This function replace the HTTP status code and the associated message. The
2675 * variable <status> contains the new status code. This function never fails. It
2676 * returns 0 in case of success, -1 in case of internal error.
2677 */
http_res_set_status(unsigned int status,struct ist reason,struct stream * s)2678 int http_res_set_status(unsigned int status, struct ist reason, struct stream *s)
2679 {
2680 struct htx *htx = htxbuf(&s->res.buf);
2681 char *res;
2682
2683 chunk_reset(&trash);
2684 res = ultoa_o(status, trash.area, trash.size);
2685 trash.data = res - trash.area;
2686
2687 /* Do we have a custom reason format string? */
2688 if (!isttest(reason)) {
2689 const char *str = http_get_reason(status);
2690 reason = ist(str);
2691 }
2692
2693 if (!http_replace_res_status(htx, ist2(trash.area, trash.data), reason))
2694 return -1;
2695 return 0;
2696 }
2697
2698 /* Executes the http-request rules <rules> for stream <s>, proxy <px> and
2699 * transaction <txn>. Returns the verdict of the first rule that prevents
2700 * further processing of the request (auth, deny, ...), and defaults to
2701 * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
2702 * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
2703 * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
2704 * and a deny/tarpit rule is matched, it will be filled with this rule's deny
2705 * status.
2706 */
http_req_get_intercept_rule(struct proxy * px,struct list * rules,struct stream * s)2707 static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules,
2708 struct stream *s)
2709 {
2710 struct session *sess = strm_sess(s);
2711 struct http_txn *txn = s->txn;
2712 struct act_rule *rule;
2713 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
2714 int act_opts = 0;
2715
2716 /* If "the current_rule_list" match the executed rule list, we are in
2717 * resume condition. If a resume is needed it is always in the action
2718 * and never in the ACL or converters. In this case, we initialise the
2719 * current rule, and go to the action execution point.
2720 */
2721 if (s->current_rule) {
2722 rule = s->current_rule;
2723 s->current_rule = NULL;
2724 if (s->current_rule_list == rules)
2725 goto resume_execution;
2726 }
2727 s->current_rule_list = rules;
2728
2729 /* start the ruleset evaluation in strict mode */
2730 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
2731
2732 list_for_each_entry(rule, rules, list) {
2733 /* check optional condition */
2734 if (rule->cond) {
2735 int ret;
2736
2737 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
2738 ret = acl_pass(ret);
2739
2740 if (rule->cond->pol == ACL_COND_UNLESS)
2741 ret = !ret;
2742
2743 if (!ret) /* condition not matched */
2744 continue;
2745 }
2746
2747 act_opts |= ACT_OPT_FIRST;
2748 resume_execution:
2749 if (rule->kw->flags & KWF_EXPERIMENTAL)
2750 mark_tainted(TAINTED_ACTION_EXP_EXECUTED);
2751
2752 /* Always call the action function if defined */
2753 if (rule->action_ptr) {
2754 if ((s->req.flags & CF_READ_ERROR) ||
2755 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
2756 (px->options & PR_O_ABRT_CLOSE)))
2757 act_opts |= ACT_OPT_FINAL;
2758
2759 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
2760 case ACT_RET_CONT:
2761 break;
2762 case ACT_RET_STOP:
2763 rule_ret = HTTP_RULE_RES_STOP;
2764 goto end;
2765 case ACT_RET_YIELD:
2766 s->current_rule = rule;
2767 rule_ret = HTTP_RULE_RES_YIELD;
2768 goto end;
2769 case ACT_RET_ERR:
2770 rule_ret = HTTP_RULE_RES_ERROR;
2771 goto end;
2772 case ACT_RET_DONE:
2773 rule_ret = HTTP_RULE_RES_DONE;
2774 goto end;
2775 case ACT_RET_DENY:
2776 if (txn->status == -1)
2777 txn->status = 403;
2778 rule_ret = HTTP_RULE_RES_DENY;
2779 goto end;
2780 case ACT_RET_ABRT:
2781 rule_ret = HTTP_RULE_RES_ABRT;
2782 goto end;
2783 case ACT_RET_INV:
2784 rule_ret = HTTP_RULE_RES_BADREQ;
2785 goto end;
2786 }
2787 continue; /* eval the next rule */
2788 }
2789
2790 /* If not action function defined, check for known actions */
2791 switch (rule->action) {
2792 case ACT_ACTION_ALLOW:
2793 rule_ret = HTTP_RULE_RES_STOP;
2794 goto end;
2795
2796 case ACT_ACTION_DENY:
2797 txn->status = rule->arg.http_reply->status;
2798 txn->http_reply = rule->arg.http_reply;
2799 rule_ret = HTTP_RULE_RES_DENY;
2800 goto end;
2801
2802 case ACT_HTTP_REQ_TARPIT:
2803 txn->flags |= TX_CLTARPIT;
2804 txn->status = rule->arg.http_reply->status;
2805 txn->http_reply = rule->arg.http_reply;
2806 rule_ret = HTTP_RULE_RES_DENY;
2807 goto end;
2808
2809 case ACT_HTTP_REDIR:
2810 rule_ret = HTTP_RULE_RES_ABRT;
2811 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
2812 rule_ret = HTTP_RULE_RES_ERROR;
2813 goto end;
2814
2815 case ACT_HTTP_SET_NICE:
2816 s->task->nice = rule->arg.http.i;
2817 break;
2818
2819 case ACT_HTTP_SET_TOS:
2820 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
2821 break;
2822
2823 case ACT_HTTP_SET_MARK:
2824 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
2825 break;
2826
2827 case ACT_HTTP_SET_LOGL:
2828 s->logs.level = rule->arg.http.i;
2829 break;
2830
2831 /* other flags exists, but normally, they never be matched. */
2832 default:
2833 break;
2834 }
2835 }
2836
2837 end:
2838 /* if the ruleset evaluation is finished reset the strict mode */
2839 if (rule_ret != HTTP_RULE_RES_YIELD)
2840 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
2841
2842 /* we reached the end of the rules, nothing to report */
2843 return rule_ret;
2844 }
2845
2846 /* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
2847 * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
2848 * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
2849 * is returned, the process can continue the evaluation of next rule list. If
2850 * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
2851 * is returned, it means the operation could not be processed and a server error
2852 * must be returned. If *YIELD is returned, the caller must call again the
2853 * function with the same context.
2854 */
http_res_get_intercept_rule(struct proxy * px,struct list * rules,struct stream * s)2855 static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules,
2856 struct stream *s)
2857 {
2858 struct session *sess = strm_sess(s);
2859 struct http_txn *txn = s->txn;
2860 struct act_rule *rule;
2861 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
2862 int act_opts = 0;
2863
2864 /* If "the current_rule_list" match the executed rule list, we are in
2865 * resume condition. If a resume is needed it is always in the action
2866 * and never in the ACL or converters. In this case, we initialise the
2867 * current rule, and go to the action execution point.
2868 */
2869 if (s->current_rule) {
2870 rule = s->current_rule;
2871 s->current_rule = NULL;
2872 if (s->current_rule_list == rules)
2873 goto resume_execution;
2874 }
2875 s->current_rule_list = rules;
2876
2877 /* start the ruleset evaluation in strict mode */
2878 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
2879
2880 list_for_each_entry(rule, rules, list) {
2881 /* check optional condition */
2882 if (rule->cond) {
2883 int ret;
2884
2885 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
2886 ret = acl_pass(ret);
2887
2888 if (rule->cond->pol == ACL_COND_UNLESS)
2889 ret = !ret;
2890
2891 if (!ret) /* condition not matched */
2892 continue;
2893 }
2894
2895 act_opts |= ACT_OPT_FIRST;
2896 resume_execution:
2897 if (rule->kw->flags & KWF_EXPERIMENTAL)
2898 mark_tainted(TAINTED_ACTION_EXP_EXECUTED);
2899
2900 /* Always call the action function if defined */
2901 if (rule->action_ptr) {
2902 if ((s->req.flags & CF_READ_ERROR) ||
2903 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
2904 (px->options & PR_O_ABRT_CLOSE)))
2905 act_opts |= ACT_OPT_FINAL;
2906
2907 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
2908 case ACT_RET_CONT:
2909 break;
2910 case ACT_RET_STOP:
2911 rule_ret = HTTP_RULE_RES_STOP;
2912 goto end;
2913 case ACT_RET_YIELD:
2914 s->current_rule = rule;
2915 rule_ret = HTTP_RULE_RES_YIELD;
2916 goto end;
2917 case ACT_RET_ERR:
2918 rule_ret = HTTP_RULE_RES_ERROR;
2919 goto end;
2920 case ACT_RET_DONE:
2921 rule_ret = HTTP_RULE_RES_DONE;
2922 goto end;
2923 case ACT_RET_DENY:
2924 if (txn->status == -1)
2925 txn->status = 502;
2926 rule_ret = HTTP_RULE_RES_DENY;
2927 goto end;
2928 case ACT_RET_ABRT:
2929 rule_ret = HTTP_RULE_RES_ABRT;
2930 goto end;
2931 case ACT_RET_INV:
2932 rule_ret = HTTP_RULE_RES_BADREQ;
2933 goto end;
2934 }
2935 continue; /* eval the next rule */
2936 }
2937
2938 /* If not action function defined, check for known actions */
2939 switch (rule->action) {
2940 case ACT_ACTION_ALLOW:
2941 rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
2942 goto end;
2943
2944 case ACT_ACTION_DENY:
2945 txn->status = rule->arg.http_reply->status;
2946 txn->http_reply = rule->arg.http_reply;
2947 rule_ret = HTTP_RULE_RES_DENY;
2948 goto end;
2949
2950 case ACT_HTTP_SET_NICE:
2951 s->task->nice = rule->arg.http.i;
2952 break;
2953
2954 case ACT_HTTP_SET_TOS:
2955 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
2956 break;
2957
2958 case ACT_HTTP_SET_MARK:
2959 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
2960 break;
2961
2962 case ACT_HTTP_SET_LOGL:
2963 s->logs.level = rule->arg.http.i;
2964 break;
2965
2966 case ACT_HTTP_REDIR:
2967 rule_ret = HTTP_RULE_RES_ABRT;
2968 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
2969 rule_ret = HTTP_RULE_RES_ERROR;
2970 goto end;
2971
2972 /* other flags exists, but normally, they never be matched. */
2973 default:
2974 break;
2975 }
2976 }
2977
2978 end:
2979 /* if the ruleset evaluation is finished reset the strict mode */
2980 if (rule_ret != HTTP_RULE_RES_YIELD)
2981 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
2982
2983 /* we reached the end of the rules, nothing to report */
2984 return rule_ret;
2985 }
2986
2987 /* Executes backend and frontend http-after-response rules for the stream <s>,
2988 * in that order. it return 1 on success and 0 on error. It is the caller
2989 * responsibility to catch error or ignore it. If it catches it, this function
2990 * may be called a second time, for the internal error.
2991 */
http_eval_after_res_rules(struct stream * s)2992 int http_eval_after_res_rules(struct stream *s)
2993 {
2994 struct session *sess = s->sess;
2995 enum rule_result ret = HTTP_RULE_RES_CONT;
2996
2997 /* Eval after-response ruleset only if the reply is not const */
2998 if (s->txn->flags & TX_CONST_REPLY)
2999 goto end;
3000
3001 /* prune the request variables if not already done and swap to the response variables. */
3002 if (s->vars_reqres.scope != SCOPE_RES) {
3003 if (!LIST_ISEMPTY(&s->vars_reqres.head))
3004 vars_prune(&s->vars_reqres, s->sess, s);
3005 vars_init(&s->vars_reqres, SCOPE_RES);
3006 }
3007
3008 ret = http_res_get_intercept_rule(s->be, &s->be->http_after_res_rules, s);
3009 if ((ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) && sess->fe != s->be)
3010 ret = http_res_get_intercept_rule(sess->fe, &sess->fe->http_after_res_rules, s);
3011
3012 end:
3013 /* All other codes than CONTINUE, STOP or DONE are forbidden */
3014 return (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP || ret == HTTP_RULE_RES_DONE);
3015 }
3016
3017 /*
3018 * Manage client-side cookie. It can impact performance by about 2% so it is
3019 * desirable to call it only when needed. This code is quite complex because
3020 * of the multiple very crappy and ambiguous syntaxes we have to support. it
3021 * highly recommended not to touch this part without a good reason !
3022 */
http_manage_client_side_cookies(struct stream * s,struct channel * req)3023 static void http_manage_client_side_cookies(struct stream *s, struct channel *req)
3024 {
3025 struct session *sess = s->sess;
3026 struct http_txn *txn = s->txn;
3027 struct htx *htx;
3028 struct http_hdr_ctx ctx;
3029 char *hdr_beg, *hdr_end, *del_from;
3030 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
3031 int preserve_hdr;
3032
3033 htx = htxbuf(&req->buf);
3034 ctx.blk = NULL;
3035 while (http_find_header(htx, ist("Cookie"), &ctx, 1)) {
3036 int is_first = 1;
3037 del_from = NULL; /* nothing to be deleted */
3038 preserve_hdr = 0; /* assume we may kill the whole header */
3039
3040 /* Now look for cookies. Conforming to RFC2109, we have to support
3041 * attributes whose name begin with a '$', and associate them with
3042 * the right cookie, if we want to delete this cookie.
3043 * So there are 3 cases for each cookie read :
3044 * 1) it's a special attribute, beginning with a '$' : ignore it.
3045 * 2) it's a server id cookie that we *MAY* want to delete : save
3046 * some pointers on it (last semi-colon, beginning of cookie...)
3047 * 3) it's an application cookie : we *MAY* have to delete a previous
3048 * "special" cookie.
3049 * At the end of loop, if a "special" cookie remains, we may have to
3050 * remove it. If no application cookie persists in the header, we
3051 * *MUST* delete it.
3052 *
3053 * Note: RFC2965 is unclear about the processing of spaces around
3054 * the equal sign in the ATTR=VALUE form. A careful inspection of
3055 * the RFC explicitly allows spaces before it, and not within the
3056 * tokens (attrs or values). An inspection of RFC2109 allows that
3057 * too but section 10.1.3 lets one think that spaces may be allowed
3058 * after the equal sign too, resulting in some (rare) buggy
3059 * implementations trying to do that. So let's do what servers do.
3060 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
3061 * allowed quoted strings in values, with any possible character
3062 * after a backslash, including control chars and delimiters, which
3063 * causes parsing to become ambiguous. Browsers also allow spaces
3064 * within values even without quotes.
3065 *
3066 * We have to keep multiple pointers in order to support cookie
3067 * removal at the beginning, middle or end of header without
3068 * corrupting the header. All of these headers are valid :
3069 *
3070 * hdr_beg hdr_end
3071 * | |
3072 * v |
3073 * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 |
3074 * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v
3075 * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3
3076 * | | | | | | |
3077 * | | | | | | |
3078 * | | | | | | +--> next
3079 * | | | | | +----> val_end
3080 * | | | | +-----------> val_beg
3081 * | | | +--------------> equal
3082 * | | +----------------> att_end
3083 * | +---------------------> att_beg
3084 * +--------------------------> prev
3085 *
3086 */
3087 hdr_beg = ctx.value.ptr;
3088 hdr_end = hdr_beg + ctx.value.len;
3089 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3090 /* Iterate through all cookies on this line */
3091
3092 /* find att_beg */
3093 att_beg = prev;
3094 if (!is_first)
3095 att_beg++;
3096 is_first = 0;
3097
3098 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3099 att_beg++;
3100
3101 /* find att_end : this is the first character after the last non
3102 * space before the equal. It may be equal to hdr_end.
3103 */
3104 equal = att_end = att_beg;
3105 while (equal < hdr_end) {
3106 if (*equal == '=' || *equal == ',' || *equal == ';')
3107 break;
3108 if (HTTP_IS_SPHT(*equal++))
3109 continue;
3110 att_end = equal;
3111 }
3112
3113 /* here, <equal> points to '=', a delimiter or the end. <att_end>
3114 * is between <att_beg> and <equal>, both may be identical.
3115 */
3116 /* look for end of cookie if there is an equal sign */
3117 if (equal < hdr_end && *equal == '=') {
3118 /* look for the beginning of the value */
3119 val_beg = equal + 1;
3120 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3121 val_beg++;
3122
3123 /* find the end of the value, respecting quotes */
3124 next = http_find_cookie_value_end(val_beg, hdr_end);
3125
3126 /* make val_end point to the first white space or delimiter after the value */
3127 val_end = next;
3128 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3129 val_end--;
3130 }
3131 else
3132 val_beg = val_end = next = equal;
3133
3134 /* We have nothing to do with attributes beginning with
3135 * '$'. However, they will automatically be removed if a
3136 * header before them is removed, since they're supposed
3137 * to be linked together.
3138 */
3139 if (*att_beg == '$')
3140 continue;
3141
3142 /* Ignore cookies with no equal sign */
3143 if (equal == next) {
3144 /* This is not our cookie, so we must preserve it. But if we already
3145 * scheduled another cookie for removal, we cannot remove the
3146 * complete header, but we can remove the previous block itself.
3147 */
3148 preserve_hdr = 1;
3149 if (del_from != NULL) {
3150 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
3151 val_end += delta;
3152 next += delta;
3153 hdr_end += delta;
3154 prev = del_from;
3155 del_from = NULL;
3156 }
3157 continue;
3158 }
3159
3160 /* if there are spaces around the equal sign, we need to
3161 * strip them otherwise we'll get trouble for cookie captures,
3162 * or even for rewrites. Since this happens extremely rarely,
3163 * it does not hurt performance.
3164 */
3165 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3166 int stripped_before = 0;
3167 int stripped_after = 0;
3168
3169 if (att_end != equal) {
3170 memmove(att_end, equal, hdr_end - equal);
3171 stripped_before = (att_end - equal);
3172 equal += stripped_before;
3173 val_beg += stripped_before;
3174 }
3175
3176 if (val_beg > equal + 1) {
3177 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3178 stripped_after = (equal + 1) - val_beg;
3179 val_beg += stripped_after;
3180 stripped_before += stripped_after;
3181 }
3182
3183 val_end += stripped_before;
3184 next += stripped_before;
3185 hdr_end += stripped_before;
3186 }
3187 /* now everything is as on the diagram above */
3188
3189 /* First, let's see if we want to capture this cookie. We check
3190 * that we don't already have a client side cookie, because we
3191 * can only capture one. Also as an optimisation, we ignore
3192 * cookies shorter than the declared name.
3193 */
3194 if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
3195 (val_end - att_beg >= sess->fe->capture_namelen) &&
3196 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3197 int log_len = val_end - att_beg;
3198
3199 if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
3200 ha_alert("HTTP logging : out of memory.\n");
3201 } else {
3202 if (log_len > sess->fe->capture_len)
3203 log_len = sess->fe->capture_len;
3204 memcpy(txn->cli_cookie, att_beg, log_len);
3205 txn->cli_cookie[log_len] = 0;
3206 }
3207 }
3208
3209 /* Persistence cookies in passive, rewrite or insert mode have the
3210 * following form :
3211 *
3212 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
3213 *
3214 * For cookies in prefix mode, the form is :
3215 *
3216 * Cookie: NAME=SRV~VALUE
3217 */
3218 if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3219 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3220 struct server *srv = s->be->srv;
3221 char *delim;
3222
3223 /* if we're in cookie prefix mode, we'll search the delimiter so that we
3224 * have the server ID between val_beg and delim, and the original cookie between
3225 * delim+1 and val_end. Otherwise, delim==val_end :
3226 *
3227 * hdr_beg
3228 * |
3229 * v
3230 * NAME=SRV; # in all but prefix modes
3231 * NAME=SRV~OPAQUE ; # in prefix mode
3232 * || || | |+-> next
3233 * || || | +--> val_end
3234 * || || +---------> delim
3235 * || |+------------> val_beg
3236 * || +-------------> att_end = equal
3237 * |+-----------------> att_beg
3238 * +------------------> prev
3239 *
3240 */
3241 if (s->be->ck_opts & PR_CK_PFX) {
3242 for (delim = val_beg; delim < val_end; delim++)
3243 if (*delim == COOKIE_DELIM)
3244 break;
3245 }
3246 else {
3247 char *vbar1;
3248 delim = val_end;
3249 /* Now check if the cookie contains a date field, which would
3250 * appear after a vertical bar ('|') just after the server name
3251 * and before the delimiter.
3252 */
3253 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
3254 if (vbar1) {
3255 /* OK, so left of the bar is the server's cookie and
3256 * right is the last seen date. It is a base64 encoded
3257 * 30-bit value representing the UNIX date since the
3258 * epoch in 4-second quantities.
3259 */
3260 int val;
3261 delim = vbar1++;
3262 if (val_end - vbar1 >= 5) {
3263 val = b64tos30(vbar1);
3264 if (val > 0)
3265 txn->cookie_last_date = val << 2;
3266 }
3267 /* look for a second vertical bar */
3268 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
3269 if (vbar1 && (val_end - vbar1 > 5)) {
3270 val = b64tos30(vbar1 + 1);
3271 if (val > 0)
3272 txn->cookie_first_date = val << 2;
3273 }
3274 }
3275 }
3276
3277 /* if the cookie has an expiration date and the proxy wants to check
3278 * it, then we do that now. We first check if the cookie is too old,
3279 * then only if it has expired. We detect strict overflow because the
3280 * time resolution here is not great (4 seconds). Cookies with dates
3281 * in the future are ignored if their offset is beyond one day. This
3282 * allows an admin to fix timezone issues without expiring everyone
3283 * and at the same time avoids keeping unwanted side effects for too
3284 * long.
3285 */
3286 if (txn->cookie_first_date && s->be->cookie_maxlife &&
3287 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
3288 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
3289 txn->flags &= ~TX_CK_MASK;
3290 txn->flags |= TX_CK_OLD;
3291 delim = val_beg; // let's pretend we have not found the cookie
3292 txn->cookie_first_date = 0;
3293 txn->cookie_last_date = 0;
3294 }
3295 else if (txn->cookie_last_date && s->be->cookie_maxidle &&
3296 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
3297 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
3298 txn->flags &= ~TX_CK_MASK;
3299 txn->flags |= TX_CK_EXPIRED;
3300 delim = val_beg; // let's pretend we have not found the cookie
3301 txn->cookie_first_date = 0;
3302 txn->cookie_last_date = 0;
3303 }
3304
3305 /* Here, we'll look for the first running server which supports the cookie.
3306 * This allows to share a same cookie between several servers, for example
3307 * to dedicate backup servers to specific servers only.
3308 * However, to prevent clients from sticking to cookie-less backup server
3309 * when they have incidentely learned an empty cookie, we simply ignore
3310 * empty cookies and mark them as invalid.
3311 * The same behaviour is applied when persistence must be ignored.
3312 */
3313 if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3314 srv = NULL;
3315
3316 while (srv) {
3317 if (srv->cookie && (srv->cklen == delim - val_beg) &&
3318 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
3319 if ((srv->cur_state != SRV_ST_STOPPED) ||
3320 (s->be->options & PR_O_PERSIST) ||
3321 (s->flags & SF_FORCE_PRST)) {
3322 /* we found the server and we can use it */
3323 txn->flags &= ~TX_CK_MASK;
3324 txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
3325 s->flags |= SF_DIRECT | SF_ASSIGNED;
3326 s->target = &srv->obj_type;
3327 break;
3328 } else {
3329 /* we found a server, but it's down,
3330 * mark it as such and go on in case
3331 * another one is available.
3332 */
3333 txn->flags &= ~TX_CK_MASK;
3334 txn->flags |= TX_CK_DOWN;
3335 }
3336 }
3337 srv = srv->next;
3338 }
3339
3340 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
3341 /* no server matched this cookie or we deliberately skipped it */
3342 txn->flags &= ~TX_CK_MASK;
3343 if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3344 txn->flags |= TX_CK_UNUSED;
3345 else
3346 txn->flags |= TX_CK_INVALID;
3347 }
3348
3349 /* depending on the cookie mode, we may have to either :
3350 * - delete the complete cookie if we're in insert+indirect mode, so that
3351 * the server never sees it ;
3352 * - remove the server id from the cookie value, and tag the cookie as an
3353 * application cookie so that it does not get accidentally removed later,
3354 * if we're in cookie prefix mode
3355 */
3356 if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
3357 int delta; /* negative */
3358
3359 memmove(val_beg, delim + 1, hdr_end - (delim + 1));
3360 delta = val_beg - (delim + 1);
3361 val_end += delta;
3362 next += delta;
3363 hdr_end += delta;
3364 del_from = NULL;
3365 preserve_hdr = 1; /* we want to keep this cookie */
3366 }
3367 else if (del_from == NULL &&
3368 (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
3369 del_from = prev;
3370 }
3371 }
3372 else {
3373 /* This is not our cookie, so we must preserve it. But if we already
3374 * scheduled another cookie for removal, we cannot remove the
3375 * complete header, but we can remove the previous block itself.
3376 */
3377 preserve_hdr = 1;
3378
3379 if (del_from != NULL) {
3380 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
3381 if (att_beg >= del_from)
3382 att_beg += delta;
3383 if (att_end >= del_from)
3384 att_end += delta;
3385 val_beg += delta;
3386 val_end += delta;
3387 next += delta;
3388 hdr_end += delta;
3389 prev = del_from;
3390 del_from = NULL;
3391 }
3392 }
3393
3394 } /* for each cookie */
3395
3396
3397 /* There are no more cookies on this line.
3398 * We may still have one (or several) marked for deletion at the
3399 * end of the line. We must do this now in two ways :
3400 * - if some cookies must be preserved, we only delete from the
3401 * mark to the end of line ;
3402 * - if nothing needs to be preserved, simply delete the whole header
3403 */
3404 if (del_from) {
3405 hdr_end = (preserve_hdr ? del_from : hdr_beg);
3406 }
3407 if ((hdr_end - hdr_beg) != ctx.value.len) {
3408 if (hdr_beg != hdr_end)
3409 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
3410 else
3411 http_remove_header(htx, &ctx);
3412 }
3413 } /* for each "Cookie header */
3414 }
3415
3416 /*
3417 * Manage server-side cookies. It can impact performance by about 2% so it is
3418 * desirable to call it only when needed. This function is also used when we
3419 * just need to know if there is a cookie (eg: for check-cache).
3420 */
http_manage_server_side_cookies(struct stream * s,struct channel * res)3421 static void http_manage_server_side_cookies(struct stream *s, struct channel *res)
3422 {
3423 struct session *sess = s->sess;
3424 struct http_txn *txn = s->txn;
3425 struct htx *htx;
3426 struct http_hdr_ctx ctx;
3427 struct server *srv;
3428 char *hdr_beg, *hdr_end;
3429 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
3430 int is_cookie2 = 0;
3431
3432 htx = htxbuf(&res->buf);
3433
3434 ctx.blk = NULL;
3435 while (1) {
3436 int is_first = 1;
3437
3438 if (!http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) {
3439 if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1))
3440 break;
3441 is_cookie2 = 1;
3442 }
3443
3444 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
3445 * <prev> points to the colon.
3446 */
3447 txn->flags |= TX_SCK_PRESENT;
3448
3449 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
3450 * check-cache is enabled) and we are not interested in checking
3451 * them. Warning, the cookie capture is declared in the frontend.
3452 */
3453 if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
3454 break;
3455
3456 /* OK so now we know we have to process this response cookie.
3457 * The format of the Set-Cookie header is slightly different
3458 * from the format of the Cookie header in that it does not
3459 * support the comma as a cookie delimiter (thus the header
3460 * cannot be folded) because the Expires attribute described in
3461 * the original Netscape's spec may contain an unquoted date
3462 * with a comma inside. We have to live with this because
3463 * many browsers don't support Max-Age and some browsers don't
3464 * support quoted strings. However the Set-Cookie2 header is
3465 * clean.
3466 *
3467 * We have to keep multiple pointers in order to support cookie
3468 * removal at the beginning, middle or end of header without
3469 * corrupting the header (in case of set-cookie2). A special
3470 * pointer, <scav> points to the beginning of the set-cookie-av
3471 * fields after the first semi-colon. The <next> pointer points
3472 * either to the end of line (set-cookie) or next unquoted comma
3473 * (set-cookie2). All of these headers are valid :
3474 *
3475 * hdr_beg hdr_end
3476 * | |
3477 * v |
3478 * NAME1 = VALUE 1 ; Secure; Path="/" |
3479 * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v
3480 * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT
3481 * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard
3482 * | | | | | | | |
3483 * | | | | | | | +-> next
3484 * | | | | | | +------------> scav
3485 * | | | | | +--------------> val_end
3486 * | | | | +--------------------> val_beg
3487 * | | | +----------------------> equal
3488 * | | +------------------------> att_end
3489 * | +----------------------------> att_beg
3490 * +------------------------------> prev
3491 * -------------------------------> hdr_beg
3492 */
3493 hdr_beg = ctx.value.ptr;
3494 hdr_end = hdr_beg + ctx.value.len;
3495 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3496
3497 /* Iterate through all cookies on this line */
3498
3499 /* find att_beg */
3500 att_beg = prev;
3501 if (!is_first)
3502 att_beg++;
3503 is_first = 0;
3504
3505 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3506 att_beg++;
3507
3508 /* find att_end : this is the first character after the last non
3509 * space before the equal. It may be equal to hdr_end.
3510 */
3511 equal = att_end = att_beg;
3512
3513 while (equal < hdr_end) {
3514 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
3515 break;
3516 if (HTTP_IS_SPHT(*equal++))
3517 continue;
3518 att_end = equal;
3519 }
3520
3521 /* here, <equal> points to '=', a delimiter or the end. <att_end>
3522 * is between <att_beg> and <equal>, both may be identical.
3523 */
3524
3525 /* look for end of cookie if there is an equal sign */
3526 if (equal < hdr_end && *equal == '=') {
3527 /* look for the beginning of the value */
3528 val_beg = equal + 1;
3529 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3530 val_beg++;
3531
3532 /* find the end of the value, respecting quotes */
3533 next = http_find_cookie_value_end(val_beg, hdr_end);
3534
3535 /* make val_end point to the first white space or delimiter after the value */
3536 val_end = next;
3537 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3538 val_end--;
3539 }
3540 else {
3541 /* <equal> points to next comma, semi-colon or EOL */
3542 val_beg = val_end = next = equal;
3543 }
3544
3545 if (next < hdr_end) {
3546 /* Set-Cookie2 supports multiple cookies, and <next> points to
3547 * a colon or semi-colon before the end. So skip all attr-value
3548 * pairs and look for the next comma. For Set-Cookie, since
3549 * commas are permitted in values, skip to the end.
3550 */
3551 if (is_cookie2)
3552 next = http_find_hdr_value_end(next, hdr_end);
3553 else
3554 next = hdr_end;
3555 }
3556
3557 /* Now everything is as on the diagram above */
3558
3559 /* Ignore cookies with no equal sign */
3560 if (equal == val_end)
3561 continue;
3562
3563 /* If there are spaces around the equal sign, we need to
3564 * strip them otherwise we'll get trouble for cookie captures,
3565 * or even for rewrites. Since this happens extremely rarely,
3566 * it does not hurt performance.
3567 */
3568 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3569 int stripped_before = 0;
3570 int stripped_after = 0;
3571
3572 if (att_end != equal) {
3573 memmove(att_end, equal, hdr_end - equal);
3574 stripped_before = (att_end - equal);
3575 equal += stripped_before;
3576 val_beg += stripped_before;
3577 }
3578
3579 if (val_beg > equal + 1) {
3580 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3581 stripped_after = (equal + 1) - val_beg;
3582 val_beg += stripped_after;
3583 stripped_before += stripped_after;
3584 }
3585
3586 val_end += stripped_before;
3587 next += stripped_before;
3588 hdr_end += stripped_before;
3589
3590 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
3591 ctx.value.len = hdr_end - hdr_beg;
3592 }
3593
3594 /* First, let's see if we want to capture this cookie. We check
3595 * that we don't already have a server side cookie, because we
3596 * can only capture one. Also as an optimisation, we ignore
3597 * cookies shorter than the declared name.
3598 */
3599 if (sess->fe->capture_name != NULL &&
3600 txn->srv_cookie == NULL &&
3601 (val_end - att_beg >= sess->fe->capture_namelen) &&
3602 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3603 int log_len = val_end - att_beg;
3604 if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
3605 ha_alert("HTTP logging : out of memory.\n");
3606 }
3607 else {
3608 if (log_len > sess->fe->capture_len)
3609 log_len = sess->fe->capture_len;
3610 memcpy(txn->srv_cookie, att_beg, log_len);
3611 txn->srv_cookie[log_len] = 0;
3612 }
3613 }
3614
3615 srv = objt_server(s->target);
3616 /* now check if we need to process it for persistence */
3617 if (!(s->flags & SF_IGNORE_PRST) &&
3618 (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3619 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3620 /* assume passive cookie by default */
3621 txn->flags &= ~TX_SCK_MASK;
3622 txn->flags |= TX_SCK_FOUND;
3623
3624 /* If the cookie is in insert mode on a known server, we'll delete
3625 * this occurrence because we'll insert another one later.
3626 * We'll delete it too if the "indirect" option is set and we're in
3627 * a direct access.
3628 */
3629 if (s->be->ck_opts & PR_CK_PSV) {
3630 /* The "preserve" flag was set, we don't want to touch the
3631 * server's cookie.
3632 */
3633 }
3634 else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
3635 ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
3636 /* this cookie must be deleted */
3637 if (prev == hdr_beg && next == hdr_end) {
3638 /* whole header */
3639 http_remove_header(htx, &ctx);
3640 /* note: while both invalid now, <next> and <hdr_end>
3641 * are still equal, so the for() will stop as expected.
3642 */
3643 } else {
3644 /* just remove the value */
3645 int delta = http_del_hdr_value(hdr_beg, hdr_end, &prev, next);
3646 next = prev;
3647 hdr_end += delta;
3648 }
3649 txn->flags &= ~TX_SCK_MASK;
3650 txn->flags |= TX_SCK_DELETED;
3651 /* and go on with next cookie */
3652 }
3653 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
3654 /* replace bytes val_beg->val_end with the cookie name associated
3655 * with this server since we know it.
3656 */
3657 int sliding, delta;
3658
3659 ctx.value = ist2(val_beg, val_end - val_beg);
3660 ctx.lws_before = ctx.lws_after = 0;
3661 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen));
3662 delta = srv->cklen - (val_end - val_beg);
3663 sliding = (ctx.value.ptr - val_beg);
3664 hdr_beg += sliding;
3665 val_beg += sliding;
3666 next += sliding + delta;
3667 hdr_end += sliding + delta;
3668
3669 txn->flags &= ~TX_SCK_MASK;
3670 txn->flags |= TX_SCK_REPLACED;
3671 }
3672 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
3673 /* insert the cookie name associated with this server
3674 * before existing cookie, and insert a delimiter between them..
3675 */
3676 int sliding, delta;
3677 ctx.value = ist2(val_beg, 0);
3678 ctx.lws_before = ctx.lws_after = 0;
3679 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1));
3680 delta = srv->cklen + 1;
3681 sliding = (ctx.value.ptr - val_beg);
3682 hdr_beg += sliding;
3683 val_beg += sliding;
3684 next += sliding + delta;
3685 hdr_end += sliding + delta;
3686
3687 val_beg[srv->cklen] = COOKIE_DELIM;
3688 txn->flags &= ~TX_SCK_MASK;
3689 txn->flags |= TX_SCK_REPLACED;
3690 }
3691 }
3692 /* that's done for this cookie, check the next one on the same
3693 * line when next != hdr_end (only if is_cookie2).
3694 */
3695 }
3696 }
3697 }
3698
3699 /*
3700 * Parses the Cache-Control and Pragma request header fields to determine if
3701 * the request may be served from the cache and/or if it is cacheable. Updates
3702 * s->txn->flags.
3703 */
http_check_request_for_cacheability(struct stream * s,struct channel * req)3704 void http_check_request_for_cacheability(struct stream *s, struct channel *req)
3705 {
3706 struct http_txn *txn = s->txn;
3707 struct htx *htx;
3708 struct http_hdr_ctx ctx = { .blk = NULL };
3709 int pragma_found, cc_found;
3710
3711 if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
3712 return; /* nothing more to do here */
3713
3714 htx = htxbuf(&req->buf);
3715 pragma_found = cc_found = 0;
3716
3717 /* Check "pragma" header for HTTP/1.0 compatibility. */
3718 if (http_find_header(htx, ist("pragma"), &ctx, 1)) {
3719 if (isteqi(ctx.value, ist("no-cache"))) {
3720 pragma_found = 1;
3721 }
3722 }
3723
3724 ctx.blk = NULL;
3725 /* Don't use the cache and don't try to store if we found the
3726 * Authorization header */
3727 if (http_find_header(htx, ist("authorization"), &ctx, 1)) {
3728 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3729 txn->flags |= TX_CACHE_IGNORE;
3730 }
3731
3732
3733 /* Look for "cache-control" header and iterate over all the values
3734 * until we find one that specifies that caching is possible or not. */
3735 ctx.blk = NULL;
3736 while (http_find_header(htx, ist("cache-control"), &ctx, 0)) {
3737 cc_found = 1;
3738 /* We don't check the values after max-age, max-stale nor min-fresh,
3739 * we simply don't use the cache when they're specified. */
3740 if (istmatchi(ctx.value, ist("max-age")) ||
3741 istmatchi(ctx.value, ist("no-cache")) ||
3742 istmatchi(ctx.value, ist("max-stale")) ||
3743 istmatchi(ctx.value, ist("min-fresh"))) {
3744 txn->flags |= TX_CACHE_IGNORE;
3745 continue;
3746 }
3747 if (istmatchi(ctx.value, ist("no-store"))) {
3748 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3749 continue;
3750 }
3751 }
3752
3753 /* RFC7234#5.4:
3754 * When the Cache-Control header field is also present and
3755 * understood in a request, Pragma is ignored.
3756 * When the Cache-Control header field is not present in a
3757 * request, caches MUST consider the no-cache request
3758 * pragma-directive as having the same effect as if
3759 * "Cache-Control: no-cache" were present.
3760 */
3761 if (!cc_found && pragma_found)
3762 txn->flags |= TX_CACHE_IGNORE;
3763 }
3764
3765 /*
3766 * Check if response is cacheable or not. Updates s->txn->flags.
3767 */
http_check_response_for_cacheability(struct stream * s,struct channel * res)3768 void http_check_response_for_cacheability(struct stream *s, struct channel *res)
3769 {
3770 struct http_txn *txn = s->txn;
3771 struct http_hdr_ctx ctx = { .blk = NULL };
3772 struct htx *htx;
3773 int has_freshness_info = 0;
3774 int has_validator = 0;
3775
3776 if (txn->status < 200) {
3777 /* do not try to cache interim responses! */
3778 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3779 return;
3780 }
3781
3782 htx = htxbuf(&res->buf);
3783 /* Check "pragma" header for HTTP/1.0 compatibility. */
3784 if (http_find_header(htx, ist("pragma"), &ctx, 1)) {
3785 if (isteqi(ctx.value, ist("no-cache"))) {
3786 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3787 return;
3788 }
3789 }
3790
3791 /* Look for "cache-control" header and iterate over all the values
3792 * until we find one that specifies that caching is possible or not. */
3793 ctx.blk = NULL;
3794 while (http_find_header(htx, ist("cache-control"), &ctx, 0)) {
3795 if (isteqi(ctx.value, ist("public"))) {
3796 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
3797 continue;
3798 }
3799 if (isteqi(ctx.value, ist("private")) ||
3800 isteqi(ctx.value, ist("no-cache")) ||
3801 isteqi(ctx.value, ist("no-store")) ||
3802 isteqi(ctx.value, ist("max-age=0")) ||
3803 isteqi(ctx.value, ist("s-maxage=0"))) {
3804 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3805 continue;
3806 }
3807 /* We might have a no-cache="set-cookie" form. */
3808 if (istmatchi(ctx.value, ist("no-cache=\"set-cookie"))) {
3809 txn->flags &= ~TX_CACHE_COOK;
3810 continue;
3811 }
3812
3813 if (istmatchi(ctx.value, ist("s-maxage")) ||
3814 istmatchi(ctx.value, ist("max-age"))) {
3815 has_freshness_info = 1;
3816 continue;
3817 }
3818 }
3819
3820 /* If no freshness information could be found in Cache-Control values,
3821 * look for an Expires header. */
3822 if (!has_freshness_info) {
3823 ctx.blk = NULL;
3824 has_freshness_info = http_find_header(htx, ist("expires"), &ctx, 0);
3825 }
3826
3827 /* If no freshness information could be found in Cache-Control or Expires
3828 * values, look for an explicit validator. */
3829 if (!has_freshness_info) {
3830 ctx.blk = NULL;
3831 has_validator = 1;
3832 if (!http_find_header(htx, ist("etag"), &ctx, 0)) {
3833 ctx.blk = NULL;
3834 if (!http_find_header(htx, ist("last-modified"), &ctx, 0))
3835 has_validator = 0;
3836 }
3837 }
3838
3839 /* We won't store an entry that has neither a cache validator nor an
3840 * explicit expiration time, as suggested in RFC 7234#3. */
3841 if (!has_freshness_info && !has_validator)
3842 txn->flags |= TX_CACHE_IGNORE;
3843 }
3844
3845 /*
3846 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
3847 * for the current backend.
3848 *
3849 * It is assumed that the request is either a HEAD, GET, or POST and that the
3850 * uri_auth field is valid.
3851 *
3852 * Returns 1 if stats should be provided, otherwise 0.
3853 */
http_stats_check_uri(struct stream * s,struct http_txn * txn,struct proxy * backend)3854 static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend)
3855 {
3856 struct uri_auth *uri_auth = backend->uri_auth;
3857 struct htx *htx;
3858 struct htx_sl *sl;
3859 struct ist uri;
3860
3861 if (!uri_auth)
3862 return 0;
3863
3864 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
3865 return 0;
3866
3867 htx = htxbuf(&s->req.buf);
3868 sl = http_get_stline(htx);
3869 uri = htx_sl_req_uri(sl);
3870 if (*uri_auth->uri_prefix == '/')
3871 uri = http_get_path(uri);
3872
3873 /* check URI size */
3874 if (uri_auth->uri_len > uri.len)
3875 return 0;
3876
3877 if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
3878 return 0;
3879
3880 return 1;
3881 }
3882
3883 /* This function prepares an applet to handle the stats. It can deal with the
3884 * "100-continue" expectation, check that admin rules are met for POST requests,
3885 * and program a response message if something was unexpected. It cannot fail
3886 * and always relies on the stats applet to complete the job. It does not touch
3887 * analysers nor counters, which are left to the caller. It does not touch
3888 * s->target which is supposed to already point to the stats applet. The caller
3889 * is expected to have already assigned an appctx to the stream.
3890 */
http_handle_stats(struct stream * s,struct channel * req)3891 static int http_handle_stats(struct stream *s, struct channel *req)
3892 {
3893 struct stats_admin_rule *stats_admin_rule;
3894 struct stream_interface *si = &s->si[1];
3895 struct session *sess = s->sess;
3896 struct http_txn *txn = s->txn;
3897 struct http_msg *msg = &txn->req;
3898 struct uri_auth *uri_auth = s->be->uri_auth;
3899 const char *h, *lookup, *end;
3900 struct appctx *appctx;
3901 struct htx *htx;
3902 struct htx_sl *sl;
3903
3904 appctx = si_appctx(si);
3905 memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
3906 appctx->st1 = appctx->st2 = 0;
3907 appctx->ctx.stats.st_code = STAT_STATUS_INIT;
3908 appctx->ctx.stats.flags |= uri_auth->flags;
3909 appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
3910 if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD))
3911 appctx->ctx.stats.flags |= STAT_CHUNKED;
3912
3913 htx = htxbuf(&req->buf);
3914 sl = http_get_stline(htx);
3915 lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len;
3916 end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
3917
3918 for (h = lookup; h <= end - 3; h++) {
3919 if (memcmp(h, ";up", 3) == 0) {
3920 appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
3921 break;
3922 }
3923 }
3924
3925 for (h = lookup; h <= end - 9; h++) {
3926 if (memcmp(h, ";no-maint", 9) == 0) {
3927 appctx->ctx.stats.flags |= STAT_HIDE_MAINT;
3928 break;
3929 }
3930 }
3931
3932 if (uri_auth->refresh) {
3933 for (h = lookup; h <= end - 10; h++) {
3934 if (memcmp(h, ";norefresh", 10) == 0) {
3935 appctx->ctx.stats.flags |= STAT_NO_REFRESH;
3936 break;
3937 }
3938 }
3939 }
3940
3941 for (h = lookup; h <= end - 4; h++) {
3942 if (memcmp(h, ";csv", 4) == 0) {
3943 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
3944 break;
3945 }
3946 }
3947
3948 for (h = lookup; h <= end - 6; h++) {
3949 if (memcmp(h, ";typed", 6) == 0) {
3950 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
3951 appctx->ctx.stats.flags |= STAT_FMT_TYPED;
3952 break;
3953 }
3954 }
3955
3956 for (h = lookup; h <= end - 5; h++) {
3957 if (memcmp(h, ";json", 5) == 0) {
3958 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
3959 appctx->ctx.stats.flags |= STAT_FMT_JSON;
3960 break;
3961 }
3962 }
3963
3964 for (h = lookup; h <= end - 12; h++) {
3965 if (memcmp(h, ";json-schema", 12) == 0) {
3966 appctx->ctx.stats.flags &= ~STAT_FMT_MASK;
3967 appctx->ctx.stats.flags |= STAT_JSON_SCHM;
3968 break;
3969 }
3970 }
3971
3972 for (h = lookup; h <= end - 8; h++) {
3973 if (memcmp(h, ";st=", 4) == 0) {
3974 int i;
3975 h += 4;
3976 appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
3977 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
3978 if (strncmp(stat_status_codes[i], h, 4) == 0) {
3979 appctx->ctx.stats.st_code = i;
3980 break;
3981 }
3982 }
3983 break;
3984 }
3985 }
3986
3987 appctx->ctx.stats.scope_str = 0;
3988 appctx->ctx.stats.scope_len = 0;
3989 for (h = lookup; h <= end - 8; h++) {
3990 if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
3991 int itx = 0;
3992 const char *h2;
3993 char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
3994 const char *err;
3995
3996 h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
3997 h2 = h;
3998 appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl);
3999 while (h < end) {
4000 if (*h == ';' || *h == '&' || *h == ' ')
4001 break;
4002 itx++;
4003 h++;
4004 }
4005
4006 if (itx > STAT_SCOPE_TXT_MAXLEN)
4007 itx = STAT_SCOPE_TXT_MAXLEN;
4008 appctx->ctx.stats.scope_len = itx;
4009
4010 /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
4011 memcpy(scope_txt, h2, itx);
4012 scope_txt[itx] = '\0';
4013 err = invalid_char(scope_txt);
4014 if (err) {
4015 /* bad char in search text => clear scope */
4016 appctx->ctx.stats.scope_str = 0;
4017 appctx->ctx.stats.scope_len = 0;
4018 }
4019 break;
4020 }
4021 }
4022
4023 /* now check whether we have some admin rules for this request */
4024 list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
4025 int ret = 1;
4026
4027 if (stats_admin_rule->cond) {
4028 ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
4029 ret = acl_pass(ret);
4030 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
4031 ret = !ret;
4032 }
4033
4034 if (ret) {
4035 /* no rule, or the rule matches */
4036 appctx->ctx.stats.flags |= STAT_ADMIN;
4037 break;
4038 }
4039 }
4040
4041 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
4042 appctx->st0 = STAT_HTTP_HEAD;
4043 else if (txn->meth == HTTP_METH_POST) {
4044 if (appctx->ctx.stats.flags & STAT_ADMIN) {
4045 appctx->st0 = STAT_HTTP_POST;
4046 if (msg->msg_state < HTTP_MSG_DATA)
4047 req->analysers |= AN_REQ_HTTP_BODY;
4048 }
4049 else {
4050 /* POST without admin level */
4051 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4052 appctx->ctx.stats.st_code = STAT_STATUS_DENY;
4053 appctx->st0 = STAT_HTTP_LAST;
4054 }
4055 }
4056 else {
4057 /* Unsupported method */
4058 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4059 appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
4060 appctx->st0 = STAT_HTTP_LAST;
4061 }
4062
4063 s->task->nice = -32; /* small boost for HTTP statistics */
4064 return 1;
4065 }
4066
4067 /* This function waits for the message payload at most <time> milliseconds (may
4068 * be set to TICK_ETERNITY). It stops to wait if at least <bytes> bytes of the
4069 * payload are received (0 means no limit). It returns HTTP_RULE_* depending on
4070 * the result:
4071 *
4072 * - HTTP_RULE_RES_CONT when conditions are met to stop waiting
4073 * - HTTP_RULE_RES_YIELD to wait for more data
4074 * - HTTP_RULE_RES_ABRT when a timeout occurred.
4075 * - HTTP_RULE_RES_BADREQ if a parsing error is raised by lower level
4076 * - HTTP_RULE_RES_ERROR if an internal error occurred
4077 *
4078 * If a timeout occurred, this function is responsible to emit the right response
4079 * to the client, depending on the channel (408 on request side, 504 on response
4080 * side). All other errors must be handled by the caller.
4081 */
http_wait_for_msg_body(struct stream * s,struct channel * chn,unsigned int time,unsigned int bytes)4082 enum rule_result http_wait_for_msg_body(struct stream *s, struct channel *chn,
4083 unsigned int time, unsigned int bytes)
4084 {
4085 struct session *sess = s->sess;
4086 struct http_txn *txn = s->txn;
4087 struct http_msg *msg = ((chn->flags & CF_ISRESP) ? &txn->rsp : &txn->req);
4088 struct htx *htx;
4089 enum rule_result ret = HTTP_RULE_RES_CONT;
4090
4091 htx = htxbuf(&chn->buf);
4092
4093 if (htx->flags & HTX_FL_PARSING_ERROR) {
4094 ret = HTTP_RULE_RES_BADREQ;
4095 goto end;
4096 }
4097 if (htx->flags & HTX_FL_PROCESSING_ERROR) {
4098 ret = HTTP_RULE_RES_ERROR;
4099 goto end;
4100 }
4101
4102 /* Do nothing for bodyless and CONNECT requests */
4103 if (txn->meth == HTTP_METH_CONNECT || (msg->flags & HTTP_MSGF_BODYLESS))
4104 goto end;
4105
4106 if (!(chn->flags & CF_ISRESP) && msg->msg_state < HTTP_MSG_DATA) {
4107 if (http_handle_expect_hdr(s, htx, msg) == -1) {
4108 ret = HTTP_RULE_RES_ERROR;
4109 goto end;
4110 }
4111 }
4112
4113 msg->msg_state = HTTP_MSG_DATA;
4114
4115 /* Now we're in HTTP_MSG_DATA. We just need to know if all data have
4116 * been received or if the buffer is full.
4117 */
4118 if ((htx->flags & HTX_FL_EOM) ||
4119 htx_get_tail_type(htx) > HTX_BLK_DATA ||
4120 channel_htx_full(chn, htx, global.tune.maxrewrite) ||
4121 si_rx_blocked_room(chn_prod(chn)))
4122 goto end;
4123
4124 if (bytes) {
4125 struct htx_blk *blk;
4126 unsigned int len = 0;
4127
4128 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
4129 if (htx_get_blk_type(blk) != HTX_BLK_DATA)
4130 continue;
4131 len += htx_get_blksz(blk);
4132 if (len >= bytes)
4133 goto end;
4134 }
4135 }
4136
4137 if ((chn->flags & CF_READ_TIMEOUT) || tick_is_expired(chn->analyse_exp, now_ms)) {
4138 if (!(chn->flags & CF_ISRESP))
4139 goto abort_req;
4140 goto abort_res;
4141 }
4142
4143 /* we get here if we need to wait for more data */
4144 if (!(chn->flags & (CF_SHUTR | CF_READ_ERROR))) {
4145 if (!tick_isset(chn->analyse_exp))
4146 chn->analyse_exp = tick_add_ifset(now_ms, time);
4147 ret = HTTP_RULE_RES_YIELD;
4148 }
4149
4150 end:
4151 return ret;
4152
4153 abort_req:
4154 txn->status = 408;
4155 if (!(s->flags & SF_ERR_MASK))
4156 s->flags |= SF_ERR_CLITO;
4157 if (!(s->flags & SF_FINST_MASK))
4158 s->flags |= SF_FINST_D;
4159 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
4160 if (sess->listener && sess->listener->counters)
4161 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
4162 http_reply_and_close(s, txn->status, http_error_message(s));
4163 ret = HTTP_RULE_RES_ABRT;
4164 goto end;
4165
4166 abort_res:
4167 txn->status = 504;
4168 if (!(s->flags & SF_ERR_MASK))
4169 s->flags |= SF_ERR_SRVTO;
4170 if (!(s->flags & SF_FINST_MASK))
4171 s->flags |= SF_FINST_D;
4172 stream_inc_http_fail_ctr(s);
4173 http_reply_and_close(s, txn->status, http_error_message(s));
4174 ret = HTTP_RULE_RES_ABRT;
4175 goto end;
4176 }
4177
http_perform_server_redirect(struct stream * s,struct stream_interface * si)4178 void http_perform_server_redirect(struct stream *s, struct stream_interface *si)
4179 {
4180 struct channel *req = &s->req;
4181 struct channel *res = &s->res;
4182 struct server *srv;
4183 struct htx *htx;
4184 struct htx_sl *sl;
4185 struct ist path, location;
4186 unsigned int flags;
4187
4188 /*
4189 * Create the location
4190 */
4191 chunk_reset(&trash);
4192
4193 /* 1: add the server's prefix */
4194 /* special prefix "/" means don't change URL */
4195 srv = __objt_server(s->target);
4196 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
4197 if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len))
4198 return;
4199 }
4200
4201 /* 2: add the request Path */
4202 htx = htxbuf(&req->buf);
4203 sl = http_get_stline(htx);
4204 path = http_get_path(htx_sl_req_uri(sl));
4205 if (!isttest(path))
4206 return;
4207
4208 if (!chunk_memcat(&trash, path.ptr, path.len))
4209 return;
4210 location = ist2(trash.area, trash.data);
4211
4212 /*
4213 * Create the 302 respone
4214 */
4215 htx = htx_from_buf(&res->buf);
4216 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
4217 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4218 ist("HTTP/1.1"), ist("302"), ist("Found"));
4219 if (!sl)
4220 goto fail;
4221 sl->info.res.status = 302;
4222 s->txn->status = 302;
4223
4224 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
4225 !htx_add_header(htx, ist("Connection"), ist("close")) ||
4226 !htx_add_header(htx, ist("Content-length"), ist("0")) ||
4227 !htx_add_header(htx, ist("Location"), location))
4228 goto fail;
4229
4230 if (!htx_add_endof(htx, HTX_BLK_EOH))
4231 goto fail;
4232
4233 htx->flags |= HTX_FL_EOM;
4234 htx_to_buf(htx, &res->buf);
4235 if (!http_forward_proxy_resp(s, 1))
4236 goto fail;
4237
4238 /* return without error. */
4239 si_shutr(si);
4240 si_shutw(si);
4241 si->err_type = SI_ET_NONE;
4242 si->state = SI_ST_CLO;
4243
4244 if (!(s->flags & SF_ERR_MASK))
4245 s->flags |= SF_ERR_LOCAL;
4246 if (!(s->flags & SF_FINST_MASK))
4247 s->flags |= SF_FINST_C;
4248
4249 /* FIXME: we should increase a counter of redirects per server and per backend. */
4250 srv_inc_sess_ctr(srv);
4251 srv_set_sess_last(srv);
4252 return;
4253
4254 fail:
4255 /* If an error occurred, remove the incomplete HTTP response from the
4256 * buffer */
4257 channel_htx_truncate(res, htx);
4258 }
4259
4260 /* This function terminates the request because it was completely analyzed or
4261 * because an error was triggered during the body forwarding.
4262 */
http_end_request(struct stream * s)4263 static void http_end_request(struct stream *s)
4264 {
4265 struct channel *chn = &s->req;
4266 struct http_txn *txn = s->txn;
4267
4268 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
4269
4270 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4271 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
4272 channel_abort(chn);
4273 channel_htx_truncate(chn, htxbuf(&chn->buf));
4274 goto end;
4275 }
4276
4277 if (unlikely(txn->req.msg_state < HTTP_MSG_DONE)) {
4278 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
4279 return;
4280 }
4281
4282 if (txn->req.msg_state == HTTP_MSG_DONE) {
4283 /* No need to read anymore, the request was completely parsed.
4284 * We can shut the read side unless we want to abort_on_close,
4285 * or we have a POST request. The issue with POST requests is
4286 * that some browsers still send a CRLF after the request, and
4287 * this CRLF must be read so that it does not remain in the kernel
4288 * buffers, otherwise a close could cause an RST on some systems
4289 * (eg: Linux).
4290 */
4291 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
4292 channel_dont_read(chn);
4293
4294 /* if the server closes the connection, we want to immediately react
4295 * and close the socket to save packets and syscalls.
4296 */
4297 s->si[1].flags |= SI_FL_NOHALF;
4298
4299 /* In any case we've finished parsing the request so we must
4300 * disable Nagle when sending data because 1) we're not going
4301 * to shut this side, and 2) the server is waiting for us to
4302 * send pending data.
4303 */
4304 chn->flags |= CF_NEVER_WAIT;
4305
4306 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
4307 /* The server has not finished to respond, so we
4308 * don't want to move in order not to upset it.
4309 */
4310 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
4311 return;
4312 }
4313
4314 /* When we get here, it means that both the request and the
4315 * response have finished receiving. Depending on the connection
4316 * mode, we'll have to wait for the last bytes to leave in either
4317 * direction, and sometimes for a close to be effective.
4318 */
4319 if (txn->flags & TX_CON_WANT_TUN) {
4320 /* Tunnel mode will not have any analyser so it needs to
4321 * poll for reads.
4322 */
4323 channel_auto_read(chn);
4324 if (b_data(&chn->buf)) {
4325 DBG_TRACE_DEVEL("waiting to flush the request", STRM_EV_HTTP_ANA, s, txn);
4326 return;
4327 }
4328 txn->req.msg_state = HTTP_MSG_TUNNEL;
4329 }
4330 else {
4331 /* we're not expecting any new data to come for this
4332 * transaction, so we can close it.
4333 *
4334 * However, there is an exception if the response
4335 * length is undefined. In this case, we need to wait
4336 * the close from the server. The response will be
4337 * switched in TUNNEL mode until the end.
4338 */
4339 if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
4340 txn->rsp.msg_state != HTTP_MSG_CLOSED)
4341 goto check_channel_flags;
4342
4343 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4344 channel_shutr_now(chn);
4345 channel_shutw_now(chn);
4346 }
4347 }
4348 goto check_channel_flags;
4349 }
4350
4351 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4352 http_msg_closing:
4353 /* nothing else to forward, just waiting for the output buffer
4354 * to be empty and for the shutw_now to take effect.
4355 */
4356 if (channel_is_empty(chn)) {
4357 txn->req.msg_state = HTTP_MSG_CLOSED;
4358 goto http_msg_closed;
4359 }
4360 else if (chn->flags & CF_SHUTW) {
4361 txn->req.msg_state = HTTP_MSG_ERROR;
4362 goto end;
4363 }
4364 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
4365 return;
4366 }
4367
4368 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4369 http_msg_closed:
4370 /* if we don't know whether the server will close, we need to hard close */
4371 if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
4372 s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
4373 /* see above in MSG_DONE why we only do this in these states */
4374 if (!(s->be->options & PR_O_ABRT_CLOSE))
4375 channel_dont_read(chn);
4376 goto end;
4377 }
4378
4379 check_channel_flags:
4380 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4381 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4382 /* if we've just closed an output, let's switch */
4383 txn->req.msg_state = HTTP_MSG_CLOSING;
4384 goto http_msg_closing;
4385 }
4386
4387 end:
4388 chn->analysers &= AN_REQ_FLT_END;
4389 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
4390 chn->flags |= CF_NEVER_WAIT;
4391 if (HAS_REQ_DATA_FILTERS(s))
4392 chn->analysers |= AN_REQ_FLT_XFER_DATA;
4393 }
4394 channel_auto_close(chn);
4395 channel_auto_read(chn);
4396 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
4397 }
4398
4399
4400 /* This function terminates the response because it was completely analyzed or
4401 * because an error was triggered during the body forwarding.
4402 */
http_end_response(struct stream * s)4403 static void http_end_response(struct stream *s)
4404 {
4405 struct channel *chn = &s->res;
4406 struct http_txn *txn = s->txn;
4407
4408 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
4409
4410 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4411 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
4412 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
4413 channel_abort(&s->req);
4414 goto end;
4415 }
4416
4417 if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE)) {
4418 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
4419 return;
4420 }
4421
4422 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4423 /* In theory, we don't need to read anymore, but we must
4424 * still monitor the server connection for a possible close
4425 * while the request is being uploaded, so we don't disable
4426 * reading.
4427 */
4428 /* channel_dont_read(chn); */
4429
4430 if (txn->req.msg_state < HTTP_MSG_DONE) {
4431 /* The client seems to still be sending data, probably
4432 * because we got an error response during an upload.
4433 * We have the choice of either breaking the connection
4434 * or letting it pass through. Let's do the later.
4435 */
4436 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
4437 return;
4438 }
4439
4440 /* When we get here, it means that both the request and the
4441 * response have finished receiving. Depending on the connection
4442 * mode, we'll have to wait for the last bytes to leave in either
4443 * direction, and sometimes for a close to be effective.
4444 */
4445 if (txn->flags & TX_CON_WANT_TUN) {
4446 channel_auto_read(chn);
4447 if (b_data(&chn->buf)) {
4448 DBG_TRACE_DEVEL("waiting to flush the respone", STRM_EV_HTTP_ANA, s, txn);
4449 return;
4450 }
4451 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4452 }
4453 else {
4454 /* we're not expecting any new data to come for this
4455 * transaction, so we can close it.
4456 */
4457 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4458 channel_shutr_now(chn);
4459 channel_shutw_now(chn);
4460 }
4461 }
4462 goto check_channel_flags;
4463 }
4464
4465 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4466 http_msg_closing:
4467 /* nothing else to forward, just waiting for the output buffer
4468 * to be empty and for the shutw_now to take effect.
4469 */
4470 if (channel_is_empty(chn)) {
4471 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4472 goto http_msg_closed;
4473 }
4474 else if (chn->flags & CF_SHUTW) {
4475 txn->rsp.msg_state = HTTP_MSG_ERROR;
4476 _HA_ATOMIC_INC(&strm_sess(s)->fe->fe_counters.cli_aborts);
4477 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
4478 if (strm_sess(s)->listener && strm_sess(s)->listener->counters)
4479 _HA_ATOMIC_INC(&strm_sess(s)->listener->counters->cli_aborts);
4480 if (objt_server(s->target))
4481 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
4482 goto end;
4483 }
4484 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
4485 return;
4486 }
4487
4488 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4489 http_msg_closed:
4490 /* drop any pending data */
4491 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
4492 channel_abort(&s->req);
4493 goto end;
4494 }
4495
4496 check_channel_flags:
4497 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4498 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4499 /* if we've just closed an output, let's switch */
4500 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4501 goto http_msg_closing;
4502 }
4503
4504 end:
4505 chn->analysers &= AN_RES_FLT_END;
4506 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
4507 chn->flags |= CF_NEVER_WAIT;
4508 if (HAS_RSP_DATA_FILTERS(s))
4509 chn->analysers |= AN_RES_FLT_XFER_DATA;
4510 }
4511 channel_auto_close(chn);
4512 channel_auto_read(chn);
4513 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
4514 }
4515
4516 /* Forward a response generated by HAProxy (error/redirect/return). This
4517 * function forwards all pending incoming data. If <final> is set to 0, nothing
4518 * more is performed. It is used for 1xx informational messages. Otherwise, the
4519 * transaction is terminated and the request is emptied. On success 1 is
4520 * returned. If an error occurred, 0 is returned. If it fails, this function
4521 * only exits. It is the caller responsibility to do the cleanup.
4522 */
http_forward_proxy_resp(struct stream * s,int final)4523 int http_forward_proxy_resp(struct stream *s, int final)
4524 {
4525 struct channel *req = &s->req;
4526 struct channel *res = &s->res;
4527 struct htx *htx = htxbuf(&res->buf);
4528 size_t data;
4529
4530 if (final) {
4531 htx->flags |= HTX_FL_PROXY_RESP;
4532
4533 if (!htx_is_empty(htx) && !http_eval_after_res_rules(s))
4534 return 0;
4535
4536 if (s->txn->meth == HTTP_METH_HEAD)
4537 htx_skip_msg_payload(htx);
4538
4539 channel_auto_read(req);
4540 channel_abort(req);
4541 channel_auto_close(req);
4542 channel_htx_erase(req, htxbuf(&req->buf));
4543
4544 res->wex = tick_add_ifset(now_ms, res->wto);
4545 channel_auto_read(res);
4546 channel_auto_close(res);
4547 channel_shutr_now(res);
4548 res->flags |= CF_EOI; /* The response is terminated, add EOI */
4549 htxbuf(&res->buf)->flags |= HTX_FL_EOM; /* no more data are expected */
4550 }
4551 else {
4552 /* Send ASAP informational messages. Rely on CF_EOI for final
4553 * response.
4554 */
4555 res->flags |= CF_SEND_DONTWAIT;
4556 }
4557
4558 data = htx->data - co_data(res);
4559 c_adv(res, data);
4560 htx->first = -1;
4561 res->total += data;
4562 return 1;
4563 }
4564
http_server_error(struct stream * s,struct stream_interface * si,int err,int finst,struct http_reply * msg)4565 void http_server_error(struct stream *s, struct stream_interface *si, int err,
4566 int finst, struct http_reply *msg)
4567 {
4568 http_reply_and_close(s, s->txn->status, msg);
4569 if (!(s->flags & SF_ERR_MASK))
4570 s->flags |= err;
4571 if (!(s->flags & SF_FINST_MASK))
4572 s->flags |= finst;
4573 }
4574
http_reply_and_close(struct stream * s,short status,struct http_reply * msg)4575 void http_reply_and_close(struct stream *s, short status, struct http_reply *msg)
4576 {
4577 if (!msg) {
4578 channel_htx_truncate(&s->res, htxbuf(&s->res.buf));
4579 goto end;
4580 }
4581
4582 if (http_reply_message(s, msg) == -1) {
4583 /* On error, return a 500 error message, but don't rewrite it if
4584 * it is already an internal error. If it was already a "const"
4585 * 500 error, just fail.
4586 */
4587 if (s->txn->status == 500) {
4588 if (s->txn->flags & TX_CONST_REPLY)
4589 goto end;
4590 s->txn->flags |= TX_CONST_REPLY;
4591 }
4592 s->txn->status = 500;
4593 s->txn->http_reply = NULL;
4594 return http_reply_and_close(s, s->txn->status, http_error_message(s));
4595 }
4596
4597 end:
4598 s->res.wex = tick_add_ifset(now_ms, s->res.wto);
4599
4600 /* At this staged, HTTP analysis is finished */
4601 s->req.analysers &= AN_REQ_FLT_END;
4602 s->req.analyse_exp = TICK_ETERNITY;
4603
4604 s->res.analysers &= AN_RES_FLT_END;
4605 s->res.analyse_exp = TICK_ETERNITY;
4606
4607 channel_auto_read(&s->req);
4608 channel_abort(&s->req);
4609 channel_auto_close(&s->req);
4610 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
4611 channel_auto_read(&s->res);
4612 channel_auto_close(&s->res);
4613 channel_shutr_now(&s->res);
4614 }
4615
http_error_message(struct stream * s)4616 struct http_reply *http_error_message(struct stream *s)
4617 {
4618 const int msgnum = http_get_status_idx(s->txn->status);
4619
4620 if (s->txn->http_reply)
4621 return s->txn->http_reply;
4622 else if (s->be->replies[msgnum])
4623 return s->be->replies[msgnum];
4624 else if (strm_fe(s)->replies[msgnum])
4625 return strm_fe(s)->replies[msgnum];
4626 else
4627 return &http_err_replies[msgnum];
4628 }
4629
4630 /* Produces an HTX message from an http reply. Depending on the http reply type,
4631 * a, errorfile, an raw file or a log-format string is used. On success, it
4632 * returns 0. If an error occurs -1 is returned. If it fails, this function only
4633 * exits. It is the caller responsibility to do the cleanup.
4634 */
http_reply_to_htx(struct stream * s,struct htx * htx,struct http_reply * reply)4635 int http_reply_to_htx(struct stream *s, struct htx *htx, struct http_reply *reply)
4636 {
4637 struct buffer *errmsg;
4638 struct htx_sl *sl;
4639 struct buffer *body = NULL;
4640 const char *status, *reason, *clen, *ctype;
4641 unsigned int slflags;
4642 int ret = 0;
4643
4644 /*
4645 * - HTTP_REPLY_ERRFILES unexpected here. handled as no payload if so
4646 *
4647 * - HTTP_REPLY_INDIRECT: switch on another reply if defined or handled
4648 * as no payload if NULL. the TXN status code is set with the status
4649 * of the original reply.
4650 */
4651
4652 if (reply->type == HTTP_REPLY_INDIRECT) {
4653 if (reply->body.reply)
4654 reply = reply->body.reply;
4655 }
4656 if (reply->type == HTTP_REPLY_ERRMSG && !reply->body.errmsg) {
4657 /* get default error message */
4658 if (reply == s->txn->http_reply)
4659 s->txn->http_reply = NULL;
4660 reply = http_error_message(s);
4661 if (reply->type == HTTP_REPLY_INDIRECT) {
4662 if (reply->body.reply)
4663 reply = reply->body.reply;
4664 }
4665 }
4666
4667 if (reply->type == HTTP_REPLY_ERRMSG) {
4668 /* implicit or explicit error message*/
4669 errmsg = reply->body.errmsg;
4670 if (errmsg && !b_is_null(errmsg)) {
4671 if (!htx_copy_msg(htx, errmsg))
4672 goto fail;
4673 }
4674 }
4675 else {
4676 /* no payload, file or log-format string */
4677 if (reply->type == HTTP_REPLY_RAW) {
4678 /* file */
4679 body = &reply->body.obj;
4680 }
4681 else if (reply->type == HTTP_REPLY_LOGFMT) {
4682 /* log-format string */
4683 body = alloc_trash_chunk();
4684 if (!body)
4685 goto fail_alloc;
4686 body->data = build_logline(s, body->area, body->size, &reply->body.fmt);
4687 }
4688 /* else no payload */
4689
4690 status = ultoa(reply->status);
4691 reason = http_get_reason(reply->status);
4692 slflags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_CLEN);
4693 if (!body || !b_data(body))
4694 slflags |= HTX_SL_F_BODYLESS;
4695 sl = htx_add_stline(htx, HTX_BLK_RES_SL, slflags, ist("HTTP/1.1"), ist(status), ist(reason));
4696 if (!sl)
4697 goto fail;
4698 sl->info.res.status = reply->status;
4699
4700 clen = (body ? ultoa(b_data(body)) : "0");
4701 ctype = reply->ctype;
4702
4703 if (!LIST_ISEMPTY(&reply->hdrs)) {
4704 struct http_reply_hdr *hdr;
4705 struct buffer *value = alloc_trash_chunk();
4706
4707 if (!value)
4708 goto fail;
4709
4710 list_for_each_entry(hdr, &reply->hdrs, list) {
4711 chunk_reset(value);
4712 value->data = build_logline(s, value->area, value->size, &hdr->value);
4713 if (b_data(value) && !htx_add_header(htx, hdr->name, ist2(b_head(value), b_data(value)))) {
4714 free_trash_chunk(value);
4715 goto fail;
4716 }
4717 chunk_reset(value);
4718 }
4719 free_trash_chunk(value);
4720 }
4721
4722 if (!htx_add_header(htx, ist("content-length"), ist(clen)) ||
4723 (body && b_data(body) && ctype && !htx_add_header(htx, ist("content-type"), ist(ctype))) ||
4724 !htx_add_endof(htx, HTX_BLK_EOH) ||
4725 (body && b_data(body) && !htx_add_data_atonce(htx, ist2(b_head(body), b_data(body)))))
4726 goto fail;
4727
4728 htx->flags |= HTX_FL_EOM;
4729 }
4730
4731 leave:
4732 if (reply->type == HTTP_REPLY_LOGFMT)
4733 free_trash_chunk(body);
4734 return ret;
4735
4736 fail_alloc:
4737 if (!(s->flags & SF_ERR_MASK))
4738 s->flags |= SF_ERR_RESOURCE;
4739 /* fall through */
4740 fail:
4741 ret = -1;
4742 goto leave;
4743 }
4744
4745 /* Send an http reply to the client. On success, it returns 0. If an error
4746 * occurs -1 is returned and the response channel is truncated, removing this
4747 * way the faulty reply. This function may fail when the reply is formatted
4748 * (http_reply_to_htx) or when the reply is forwarded
4749 * (http_forward_proxy_resp). On the last case, it is because a
4750 * http-after-response rule fails.
4751 */
http_reply_message(struct stream * s,struct http_reply * reply)4752 int http_reply_message(struct stream *s, struct http_reply *reply)
4753 {
4754 struct channel *res = &s->res;
4755 struct htx *htx = htx_from_buf(&res->buf);
4756
4757 if (s->txn->status == -1)
4758 s->txn->status = reply->status;
4759 channel_htx_truncate(res, htx);
4760
4761 if (http_reply_to_htx(s, htx, reply) == -1)
4762 goto fail;
4763
4764 htx_to_buf(htx, &s->res.buf);
4765 if (!http_forward_proxy_resp(s, 1))
4766 goto fail;
4767 return 0;
4768
4769 fail:
4770 channel_htx_truncate(res, htx);
4771 if (!(s->flags & SF_ERR_MASK))
4772 s->flags |= SF_ERR_PRXCOND;
4773 return -1;
4774 }
4775
4776 /* Return the error message corresponding to si->err_type. It is assumed
4777 * that the server side is closed. Note that err_type is actually a
4778 * bitmask, where almost only aborts may be cumulated with other
4779 * values. We consider that aborted operations are more important
4780 * than timeouts or errors due to the fact that nobody else in the
4781 * logs might explain incomplete retries. All others should avoid
4782 * being cumulated. It should normally not be possible to have multiple
4783 * aborts at once, but just in case, the first one in sequence is reported.
4784 * Note that connection errors appearing on the second request of a keep-alive
4785 * connection are not reported since this allows the client to retry.
4786 */
http_return_srv_error(struct stream * s,struct stream_interface * si)4787 void http_return_srv_error(struct stream *s, struct stream_interface *si)
4788 {
4789 int err_type = si->err_type;
4790
4791 /* set s->txn->status for http_error_message(s) */
4792 s->txn->status = 503;
4793
4794 if (err_type & SI_ET_QUEUE_ABRT)
4795 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_Q,
4796 http_error_message(s));
4797 else if (err_type & SI_ET_CONN_ABRT)
4798 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_C,
4799 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4800 http_error_message(s));
4801 else if (err_type & SI_ET_QUEUE_TO)
4802 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_Q,
4803 http_error_message(s));
4804 else if (err_type & SI_ET_QUEUE_ERR)
4805 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_Q,
4806 http_error_message(s));
4807 else if (err_type & SI_ET_CONN_TO)
4808 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_C,
4809 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4810 http_error_message(s));
4811 else if (err_type & SI_ET_CONN_ERR)
4812 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_C,
4813 (s->flags & SF_SRV_REUSED) ? NULL :
4814 http_error_message(s));
4815 else if (err_type & SI_ET_CONN_RES)
4816 http_server_error(s, si, SF_ERR_RESOURCE, SF_FINST_C,
4817 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4818 http_error_message(s));
4819 else { /* SI_ET_CONN_OTHER and others */
4820 s->txn->status = 500;
4821 http_server_error(s, si, SF_ERR_INTERNAL, SF_FINST_C,
4822 http_error_message(s));
4823 }
4824 }
4825
4826
4827 /* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0
4828 * on success and -1 on error.
4829 */
http_handle_expect_hdr(struct stream * s,struct htx * htx,struct http_msg * msg)4830 static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg)
4831 {
4832 /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
4833 * then we must send an HTTP/1.1 100 Continue intermediate response.
4834 */
4835 if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
4836 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
4837 struct ist hdr = { .ptr = "Expect", .len = 6 };
4838 struct http_hdr_ctx ctx;
4839
4840 ctx.blk = NULL;
4841 /* Expect is allowed in 1.1, look for it */
4842 if (http_find_header(htx, hdr, &ctx, 0) &&
4843 unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) {
4844 if (http_reply_100_continue(s) == -1)
4845 return -1;
4846 http_remove_header(htx, &ctx);
4847 }
4848 }
4849 return 0;
4850 }
4851
4852 /* Send a 100-Continue response to the client. It returns 0 on success and -1
4853 * on error. The response channel is updated accordingly.
4854 */
http_reply_100_continue(struct stream * s)4855 static int http_reply_100_continue(struct stream *s)
4856 {
4857 struct channel *res = &s->res;
4858 struct htx *htx = htx_from_buf(&res->buf);
4859 struct htx_sl *sl;
4860 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
4861 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
4862
4863 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4864 ist("HTTP/1.1"), ist("100"), ist("Continue"));
4865 if (!sl)
4866 goto fail;
4867 sl->info.res.status = 100;
4868
4869 if (!htx_add_endof(htx, HTX_BLK_EOH))
4870 goto fail;
4871
4872 if (!http_forward_proxy_resp(s, 0))
4873 goto fail;
4874 return 0;
4875
4876 fail:
4877 /* If an error occurred, remove the incomplete HTTP response from the
4878 * buffer */
4879 channel_htx_truncate(res, htx);
4880 return -1;
4881 }
4882
4883
4884 /*
4885 * Capture headers from message <htx> according to header list <cap_hdr>, and
4886 * fill the <cap> pointers appropriately.
4887 */
http_capture_headers(struct htx * htx,char ** cap,struct cap_hdr * cap_hdr)4888 static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
4889 {
4890 struct cap_hdr *h;
4891 int32_t pos;
4892
4893 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
4894 struct htx_blk *blk = htx_get_blk(htx, pos);
4895 enum htx_blk_type type = htx_get_blk_type(blk);
4896 struct ist n, v;
4897
4898 if (type == HTX_BLK_EOH)
4899 break;
4900 if (type != HTX_BLK_HDR)
4901 continue;
4902
4903 n = htx_get_blk_name(htx, blk);
4904
4905 for (h = cap_hdr; h; h = h->next) {
4906 if (h->namelen && (h->namelen == n.len) &&
4907 (strncasecmp(n.ptr, h->name, h->namelen) == 0)) {
4908 if (cap[h->index] == NULL)
4909 cap[h->index] =
4910 pool_alloc(h->pool);
4911
4912 if (cap[h->index] == NULL) {
4913 ha_alert("HTTP capture : out of memory.\n");
4914 break;
4915 }
4916
4917 v = htx_get_blk_value(htx, blk);
4918 if (v.len > h->len)
4919 v.len = h->len;
4920
4921 memcpy(cap[h->index], v.ptr, v.len);
4922 cap[h->index][v.len]=0;
4923 }
4924 }
4925 }
4926 }
4927
4928 /* Delete a value in a header between delimiters <from> and <next>. The header
4929 * itself is delimited by <start> and <end> pointers. The number of characters
4930 * displaced is returned, and the pointer to the first delimiter is updated if
4931 * required. The function tries as much as possible to respect the following
4932 * principles :
4933 * - replace <from> delimiter by the <next> one unless <from> points to <start>,
4934 * in which case <next> is simply removed
4935 * - set exactly one space character after the new first delimiter, unless there
4936 * are not enough characters in the block being moved to do so.
4937 * - remove unneeded spaces before the previous delimiter and after the new
4938 * one.
4939 *
4940 * It is the caller's responsibility to ensure that :
4941 * - <from> points to a valid delimiter or <start> ;
4942 * - <next> points to a valid delimiter or <end> ;
4943 * - there are non-space chars before <from>.
4944 */
http_del_hdr_value(char * start,char * end,char ** from,char * next)4945 static int http_del_hdr_value(char *start, char *end, char **from, char *next)
4946 {
4947 char *prev = *from;
4948
4949 if (prev == start) {
4950 /* We're removing the first value. eat the semicolon, if <next>
4951 * is lower than <end> */
4952 if (next < end)
4953 next++;
4954
4955 while (next < end && HTTP_IS_SPHT(*next))
4956 next++;
4957 }
4958 else {
4959 /* Remove useless spaces before the old delimiter. */
4960 while (HTTP_IS_SPHT(*(prev-1)))
4961 prev--;
4962 *from = prev;
4963
4964 /* copy the delimiter and if possible a space if we're
4965 * not at the end of the line.
4966 */
4967 if (next < end) {
4968 *prev++ = *next++;
4969 if (prev + 1 < next)
4970 *prev++ = ' ';
4971 while (next < end && HTTP_IS_SPHT(*next))
4972 next++;
4973 }
4974 }
4975 memmove(prev, next, end - next);
4976 return (prev - next);
4977 }
4978
4979
4980 /* Formats the start line of the request (without CRLF) and puts it in <str> and
4981 * return the written length. The line can be truncated if it exceeds <len>.
4982 */
http_fmt_req_line(const struct htx_sl * sl,char * str,size_t len)4983 static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len)
4984 {
4985 struct ist dst = ist2(str, 0);
4986
4987 if (istcat(&dst, htx_sl_req_meth(sl), len) == -1)
4988 goto end;
4989 if (dst.len + 1 > len)
4990 goto end;
4991 dst.ptr[dst.len++] = ' ';
4992
4993 if (istcat(&dst, htx_sl_req_uri(sl), len) == -1)
4994 goto end;
4995 if (dst.len + 1 > len)
4996 goto end;
4997 dst.ptr[dst.len++] = ' ';
4998
4999 istcat(&dst, htx_sl_req_vsn(sl), len);
5000 end:
5001 return dst.len;
5002 }
5003
5004 /*
5005 * Print a debug line with a start line.
5006 */
http_debug_stline(const char * dir,struct stream * s,const struct htx_sl * sl)5007 static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl)
5008 {
5009 struct session *sess = strm_sess(s);
5010 int max;
5011
5012 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5013 dir,
5014 objt_conn(sess->origin) ? (unsigned short)__objt_conn(sess->origin)->handle.fd : -1,
5015 objt_cs(s->si[1].end) ? (unsigned short)__objt_cs(s->si[1].end)->conn->handle.fd : -1);
5016
5017 max = HTX_SL_P1_LEN(sl);
5018 UBOUND(max, trash.size - trash.data - 3);
5019 chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max);
5020 trash.area[trash.data++] = ' ';
5021
5022 max = HTX_SL_P2_LEN(sl);
5023 UBOUND(max, trash.size - trash.data - 2);
5024 chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max);
5025 trash.area[trash.data++] = ' ';
5026
5027 max = HTX_SL_P3_LEN(sl);
5028 UBOUND(max, trash.size - trash.data - 1);
5029 chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max);
5030 trash.area[trash.data++] = '\n';
5031
5032 DISGUISE(write(1, trash.area, trash.data));
5033 }
5034
5035 /*
5036 * Print a debug line with a header.
5037 */
http_debug_hdr(const char * dir,struct stream * s,const struct ist n,const struct ist v)5038 static void http_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v)
5039 {
5040 struct session *sess = strm_sess(s);
5041 int max;
5042
5043 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5044 dir,
5045 objt_conn(sess->origin) ? (unsigned short)__objt_conn(sess->origin)->handle.fd : -1,
5046 objt_cs(s->si[1].end) ? (unsigned short)__objt_cs(s->si[1].end)->conn->handle.fd : -1);
5047
5048 max = n.len;
5049 UBOUND(max, trash.size - trash.data - 3);
5050 chunk_memcat(&trash, n.ptr, max);
5051 trash.area[trash.data++] = ':';
5052 trash.area[trash.data++] = ' ';
5053
5054 max = v.len;
5055 UBOUND(max, trash.size - trash.data - 1);
5056 chunk_memcat(&trash, v.ptr, max);
5057 trash.area[trash.data++] = '\n';
5058
5059 DISGUISE(write(1, trash.area, trash.data));
5060 }
5061
5062 /* Allocate a new HTTP transaction for stream <s> unless there is one already.
5063 * In case of allocation failure, everything allocated is freed and NULL is
5064 * returned. Otherwise the new transaction is assigned to the stream and
5065 * returned.
5066 */
http_alloc_txn(struct stream * s)5067 struct http_txn *http_alloc_txn(struct stream *s)
5068 {
5069 struct http_txn *txn = s->txn;
5070
5071 if (txn)
5072 return txn;
5073
5074 txn = pool_alloc(pool_head_http_txn);
5075 if (!txn)
5076 return txn;
5077
5078 s->txn = txn;
5079 return txn;
5080 }
5081
http_txn_reset_req(struct http_txn * txn)5082 void http_txn_reset_req(struct http_txn *txn)
5083 {
5084 txn->req.flags = 0;
5085 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
5086 }
5087
http_txn_reset_res(struct http_txn * txn)5088 void http_txn_reset_res(struct http_txn *txn)
5089 {
5090 txn->rsp.flags = 0;
5091 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
5092 }
5093
5094 /*
5095 * Create and initialize a new HTTP transaction for stream <s>. This should be
5096 * used before processing any new request. It returns the transaction or NLULL
5097 * on error.
5098 */
http_create_txn(struct stream * s)5099 struct http_txn *http_create_txn(struct stream *s)
5100 {
5101 struct http_txn *txn;
5102 struct conn_stream *cs = objt_cs(s->si[0].end);
5103
5104 txn = pool_alloc(pool_head_http_txn);
5105 if (!txn)
5106 return NULL;
5107 s->txn = txn;
5108
5109 txn->flags = ((cs && cs->flags & CS_FL_NOT_FIRST) ? TX_NOT_FIRST : 0);
5110 txn->status = -1;
5111 txn->http_reply = NULL;
5112 write_u32(txn->cache_hash, 0);
5113
5114 txn->cookie_first_date = 0;
5115 txn->cookie_last_date = 0;
5116
5117 txn->srv_cookie = NULL;
5118 txn->cli_cookie = NULL;
5119 txn->uri = NULL;
5120
5121 http_txn_reset_req(txn);
5122 http_txn_reset_res(txn);
5123
5124 txn->req.chn = &s->req;
5125 txn->rsp.chn = &s->res;
5126
5127 txn->auth.method = HTTP_AUTH_UNKNOWN;
5128
5129 vars_init(&s->vars_txn, SCOPE_TXN);
5130 vars_init(&s->vars_reqres, SCOPE_REQ);
5131
5132 return txn;
5133 }
5134
5135 /* to be used at the end of a transaction */
http_destroy_txn(struct stream * s)5136 void http_destroy_txn(struct stream *s)
5137 {
5138 struct http_txn *txn = s->txn;
5139
5140 /* these ones will have been dynamically allocated */
5141 pool_free(pool_head_requri, txn->uri);
5142 pool_free(pool_head_capture, txn->cli_cookie);
5143 pool_free(pool_head_capture, txn->srv_cookie);
5144 pool_free(pool_head_uniqueid, s->unique_id.ptr);
5145
5146 s->unique_id = IST_NULL;
5147 txn->uri = NULL;
5148 txn->srv_cookie = NULL;
5149 txn->cli_cookie = NULL;
5150
5151 if (!LIST_ISEMPTY(&s->vars_txn.head))
5152 vars_prune(&s->vars_txn, s->sess, s);
5153 if (!LIST_ISEMPTY(&s->vars_reqres.head))
5154 vars_prune(&s->vars_reqres, s->sess, s);
5155
5156 pool_free(pool_head_http_txn, txn);
5157 s->txn = NULL;
5158 }
5159
5160
5161 DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn));
5162
5163 __attribute__((constructor))
__http_protocol_init(void)5164 static void __http_protocol_init(void)
5165 {
5166 }
5167
5168
5169 /*
5170 * Local variables:
5171 * c-indent-level: 8
5172 * c-basic-offset: 8
5173 * End:
5174 */
5175