blob: f265e9324c19d572d6fda481d1cfa03da3cad9cf [file] [log] [blame]
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02001/*
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
Willy Tarreaudcc048a2020-06-04 19:11:43 +020013#include <haproxy/acl.h>
Willy Tarreau122eba92020-06-04 10:15:32 +020014#include <haproxy/action-t.h>
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020015#include <haproxy/api.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020016#include <haproxy/backend.h>
Willy Tarreau8d366972020-05-27 16:10:29 +020017#include <haproxy/base64.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020018#include <haproxy/capture-t.h>
Amaury Denoyelle03517732021-05-07 14:25:01 +020019#include <haproxy/cfgparse.h>
Willy Tarreauf1d32c42020-06-04 21:07:02 +020020#include <haproxy/channel.h>
Willy Tarreau4aa573d2020-06-04 18:21:56 +020021#include <haproxy/check.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020022#include <haproxy/connection.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020023#include <haproxy/errors.h>
Willy Tarreauc7babd82020-06-04 21:29:29 +020024#include <haproxy/filters.h>
Willy Tarreaucd72d8c2020-06-02 19:11:26 +020025#include <haproxy/http.h>
Willy Tarreauc2b1ff02020-06-04 21:21:03 +020026#include <haproxy/http_ana.h>
Willy Tarreau87735332020-06-04 09:08:41 +020027#include <haproxy/http_htx.h>
Willy Tarreau16f958c2020-06-03 08:44:35 +020028#include <haproxy/htx.h>
Willy Tarreauaeed4a82020-06-04 22:01:04 +020029#include <haproxy/log.h>
Willy Tarreau6131d6a2020-06-02 16:48:09 +020030#include <haproxy/net_helper.h>
Willy Tarreaua264d962020-06-04 22:29:18 +020031#include <haproxy/proxy.h>
Willy Tarreau7cd8b6e2020-06-02 17:32:26 +020032#include <haproxy/regex.h>
Willy Tarreau1e56f922020-06-04 23:20:13 +020033#include <haproxy/server-t.h>
Willy Tarreau2eec9b52020-06-04 19:58:55 +020034#include <haproxy/stats.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020035#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020036#include <haproxy/stream_interface.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020037#include <haproxy/trace.h>
Willy Tarreau8c42b8a2020-06-04 19:27:34 +020038#include <haproxy/uri_auth-t.h>
Willy Tarreaua1718922020-06-04 16:25:31 +020039#include <haproxy/vars.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020040
Christopher Faulete0768eb2018-10-03 16:38:02 +020041
Christopher Fauleteea8fc72019-11-05 16:18:10 +010042#define TRACE_SOURCE &trace_strm
43
Christopher Faulet377c5a52018-10-24 21:21:30 +020044extern const char *stat_status_codes[];
Christopher Fauletf2824e62018-10-01 12:12:37 +020045
Willy Tarreauff882702021-04-10 17:23:00 +020046struct pool_head *pool_head_requri __read_mostly = NULL;
47struct pool_head *pool_head_capture __read_mostly = NULL;
Christopher Fauleta8a46e22019-07-16 14:53:09 +020048
49
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020050static void http_end_request(struct stream *s);
51static void http_end_response(struct stream *s);
Christopher Fauletf2824e62018-10-01 12:12:37 +020052
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020053static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr);
54static int http_del_hdr_value(char *start, char *end, char **from, char *next);
55static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len);
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020056static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl);
57static void http_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v);
Christopher Faulet0f226952018-10-22 09:29:56 +020058
Christopher Fauletb58f62b2020-01-13 16:40:13 +010059static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020060static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
Christopher Faulet79507152022-05-16 11:43:10 +020061static enum rule_result http_req_restrict_header_names(struct stream *s, struct htx *htx, struct proxy *px);
Christopher Faulet3e964192018-10-24 11:39:23 +020062
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020063static void http_manage_client_side_cookies(struct stream *s, struct channel *req);
64static void http_manage_server_side_cookies(struct stream *s, struct channel *res);
Christopher Fauletfcda7c62018-10-24 11:56:22 +020065
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020066static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend);
67static int http_handle_stats(struct stream *s, struct channel *req);
Christopher Faulet377c5a52018-10-24 21:21:30 +020068
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020069static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg);
70static int http_reply_100_continue(struct stream *s);
Christopher Faulet23a3c792018-11-28 10:01:23 +010071
Christopher Faulete0768eb2018-10-03 16:38:02 +020072/* This stream analyser waits for a complete HTTP request. It returns 1 if the
73 * processing can continue on next analysers, or zero if it either needs more
74 * data or wants to immediately abort the request (eg: timeout, error, ...). It
75 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req.analysers
76 * when it has nothing left to do, and may remove any analyser when it wants to
77 * abort.
78 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020079int http_wait_for_request(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +020080{
Christopher Faulet9768c262018-10-22 09:34:31 +020081
Christopher Faulete0768eb2018-10-03 16:38:02 +020082 /*
Christopher Faulet9768c262018-10-22 09:34:31 +020083 * We will analyze a complete HTTP request to check the its syntax.
Christopher Faulete0768eb2018-10-03 16:38:02 +020084 *
Christopher Faulet9768c262018-10-22 09:34:31 +020085 * Once the start line and all headers are received, we may perform a
86 * capture of the error (if any), and we will set a few fields. We also
87 * check for monitor-uri, logging and finally headers capture.
Christopher Faulete0768eb2018-10-03 16:38:02 +020088 */
Christopher Faulete0768eb2018-10-03 16:38:02 +020089 struct session *sess = s->sess;
90 struct http_txn *txn = s->txn;
91 struct http_msg *msg = &txn->req;
Christopher Faulet9768c262018-10-22 09:34:31 +020092 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +010093 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +020094
Christopher Fauleteea8fc72019-11-05 16:18:10 +010095 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +020096
Christopher Fauletda46a0d2021-01-21 17:32:58 +010097 if (unlikely(!IS_HTX_STRM(s))) {
98 /* It is only possible when a TCP stream is upgrade to HTTP.
99 * There is a transition period during which there is no
100 * data. The stream is still in raw mode and SF_IGNORE flag is
101 * still set. When this happens, the new mux is responsible to
Ilya Shipitsinacf84592021-02-06 22:29:08 +0500102 * handle all errors. Thus we may leave immediately.
Christopher Fauletda46a0d2021-01-21 17:32:58 +0100103 */
104 BUG_ON(!(s->flags & SF_IGNORE) || !c_empty(&s->req));
Christopher Faulet9768c262018-10-22 09:34:31 +0200105
Christopher Faulet97b3a612021-03-15 17:10:12 +0100106 /* Don't connect for now */
107 channel_dont_connect(req);
108
109 /* A SHUTR at this stage means we are performing a "destructive"
110 * HTTP upgrade (TCP>H2). In this case, we can leave.
111 */
112 if (req->flags & CF_SHUTR) {
113 s->logs.logwait = 0;
114 s->logs.level = 0;
115 channel_abort(&s->req);
116 channel_abort(&s->res);
117 req->analysers &= AN_REQ_FLT_END;
118 req->analyse_exp = TICK_ETERNITY;
119 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA, s);
120 return 1;
121 }
Christopher Fauletda46a0d2021-01-21 17:32:58 +0100122 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA, s);
123 return 0;
124 }
125
126 htx = htxbuf(&req->buf);
Christopher Faulet8bebd2f2020-10-06 17:54:56 +0200127
Willy Tarreau4236f032019-03-05 10:43:32 +0100128 /* Parsing errors are caught here */
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200129 if (htx->flags & (HTX_FL_PARSING_ERROR|HTX_FL_PROCESSING_ERROR)) {
Willy Tarreau4236f032019-03-05 10:43:32 +0100130 stream_inc_http_req_ctr(s);
Emeric Brun28976442020-10-07 08:50:09 +0200131 proxy_inc_fe_req_ctr(sess->listener, sess->fe);
Christopher Fauletbf7175f2021-02-10 14:58:01 +0100132 if (htx->flags & HTX_FL_PARSING_ERROR) {
133 stream_inc_http_err_ctr(s);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200134 goto return_bad_req;
Christopher Fauletbf7175f2021-02-10 14:58:01 +0100135 }
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200136 else
137 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +0100138 }
139
Christopher Faulete0768eb2018-10-03 16:38:02 +0200140 /* we're speaking HTTP here, so let's speak HTTP to the client */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200141 s->srv_error = http_return_srv_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200142
Christopher Faulet9768c262018-10-22 09:34:31 +0200143 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200144 stream_inc_http_req_ctr(s);
Emeric Brun28976442020-10-07 08:50:09 +0200145 proxy_inc_fe_req_ctr(sess->listener, sess->fe); /* one more valid request for this FE */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200146
Christopher Faulet9768c262018-10-22 09:34:31 +0200147 /* kill the pending keep-alive timeout */
Christopher Faulet9768c262018-10-22 09:34:31 +0200148 req->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200149
Christopher Faulet29f17582019-05-23 11:03:26 +0200150 BUG_ON(htx_get_first_type(htx) != HTX_BLK_REQ_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +0200151 sl = http_get_stline(htx);
Christopher Faulet03599112018-11-27 11:21:21 +0100152
Christopher Faulet9768c262018-10-22 09:34:31 +0200153 /* 0: we might have to print this header in debug mode */
154 if (unlikely((global.mode & MODE_DEBUG) &&
155 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
156 int32_t pos;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200157
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200158 http_debug_stline("clireq", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +0200159
Christopher Fauleta3f15502019-05-13 15:27:23 +0200160 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200161 struct htx_blk *blk = htx_get_blk(htx, pos);
162 enum htx_blk_type type = htx_get_blk_type(blk);
163
164 if (type == HTX_BLK_EOH)
165 break;
166 if (type != HTX_BLK_HDR)
167 continue;
168
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200169 http_debug_hdr("clihdr", s,
170 htx_get_blk_name(htx, blk),
171 htx_get_blk_value(htx, blk));
Christopher Faulet9768c262018-10-22 09:34:31 +0200172 }
173 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200174
175 /*
Christopher Faulet03599112018-11-27 11:21:21 +0100176 * 1: identify the method and the version. Also set HTTP flags
Christopher Faulete0768eb2018-10-03 16:38:02 +0200177 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100178 txn->meth = sl->info.req.meth;
Christopher Faulet03599112018-11-27 11:21:21 +0100179 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +0200180 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +0100181 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet2a408542020-11-20 14:22:37 +0100182 if (sl->flags & HTX_SL_F_CLEN)
183 msg->flags |= HTTP_MSGF_CNT_LEN;
184 else if (sl->flags & HTX_SL_F_CHNK)
185 msg->flags |= HTTP_MSGF_TE_CHNK;
Christopher Fauletb2db4fa2018-11-27 16:51:09 +0100186 if (sl->flags & HTX_SL_F_BODYLESS)
187 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulet576c3582021-01-08 15:53:01 +0100188 if (sl->flags & HTX_SL_F_CONN_UPG)
189 msg->flags |= HTTP_MSGF_CONN_UPG;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200190
191 /* we can make use of server redirect on GET and HEAD */
192 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
193 s->flags |= SF_REDIRECTABLE;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100194 else if (txn->meth == HTTP_METH_OTHER && isteqi(htx_sl_req_meth(sl), ist("PRI"))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200195 /* PRI is reserved for the HTTP/2 preface */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200196 goto return_bad_req;
197 }
198
199 /*
Christopher Faulet6072beb2020-02-18 15:34:58 +0100200 * 2: check if the URI matches the monitor_uri. We have to do this for
201 * every request which gets in, because the monitor-uri is defined by
202 * the frontend. If the monitor-uri starts with a '/', the matching is
203 * done against the request's path. Otherwise, the request's uri is
204 * used. It is a workaround to let HTTP/2 health-checks work as
205 * expected.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200206 */
207 if (unlikely((sess->fe->monitor_uri_len != 0) &&
Christopher Faulet6072beb2020-02-18 15:34:58 +0100208 ((*sess->fe->monitor_uri == '/' && isteq(http_get_path(htx_sl_req_uri(sl)),
209 ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))) ||
210 isteq(htx_sl_req_uri(sl), ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200211 /*
212 * We have found the monitor URI
213 */
214 struct acl_cond *cond;
215
216 s->flags |= SF_MONITOR;
Willy Tarreau4781b152021-04-06 13:53:36 +0200217 _HA_ATOMIC_INC(&sess->fe->fe_counters.intercepted_req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200218
219 /* Check if we want to fail this monitor request or not */
220 list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) {
221 int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
222
223 ret = acl_pass(ret);
224 if (cond->pol == ACL_COND_UNLESS)
225 ret = !ret;
226
227 if (ret) {
228 /* we fail this request, let's return 503 service unavail */
229 txn->status = 503;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200230 if (!(s->flags & SF_ERR_MASK))
231 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
232 goto return_prx_cond;
233 }
234 }
235
Joseph Herlantc42c0e92018-11-25 10:43:27 -0800236 /* nothing to fail, let's reply normally */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200237 txn->status = 200;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200238 if (!(s->flags & SF_ERR_MASK))
239 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
240 goto return_prx_cond;
241 }
242
243 /*
244 * 3: Maybe we have to copy the original REQURI for the logs ?
245 * Note: we cannot log anymore if the request has been
246 * classified as invalid.
247 */
248 if (unlikely(s->logs.logwait & LW_REQ)) {
249 /* we have a complete HTTP request that we must log */
250 if ((txn->uri = pool_alloc(pool_head_requri)) != NULL) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200251 size_t len;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200252
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200253 len = http_fmt_req_line(sl, txn->uri, global.tune.requri_len - 1);
Christopher Faulet9768c262018-10-22 09:34:31 +0200254 txn->uri[len] = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200255
256 if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT)))
257 s->do_log(s);
258 } else {
259 ha_alert("HTTP logging : out of memory.\n");
260 }
261 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200262
Christopher Faulete0768eb2018-10-03 16:38:02 +0200263 /* if the frontend has "option http-use-proxy-header", we'll check if
264 * we have what looks like a proxied connection instead of a connection,
265 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
266 * Note that this is *not* RFC-compliant, however browsers and proxies
267 * happen to do that despite being non-standard :-(
268 * We consider that a request not beginning with either '/' or '*' is
269 * a proxied connection, which covers both "scheme://location" and
270 * CONNECT ip:port.
271 */
272 if ((sess->fe->options2 & PR_O2_USE_PXHDR) &&
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100273 *HTX_SL_REQ_UPTR(sl) != '/' && *HTX_SL_REQ_UPTR(sl) != '*')
Christopher Faulete0768eb2018-10-03 16:38:02 +0200274 txn->flags |= TX_USE_PX_CONN;
275
Christopher Faulete0768eb2018-10-03 16:38:02 +0200276 /* 5: we may need to capture headers */
277 if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200278 http_capture_headers(htx, s->req_cap, sess->fe->req_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200279
Christopher Faulete0768eb2018-10-03 16:38:02 +0200280 /* we may have to wait for the request's body */
Christopher Faulet9768c262018-10-22 09:34:31 +0200281 if (s->be->options & PR_O_WREQ_BODY)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200282 req->analysers |= AN_REQ_HTTP_BODY;
283
284 /*
285 * RFC7234#4:
286 * A cache MUST write through requests with methods
287 * that are unsafe (Section 4.2.1 of [RFC7231]) to
288 * the origin server; i.e., a cache is not allowed
289 * to generate a reply to such a request before
290 * having forwarded the request and having received
291 * a corresponding response.
292 *
293 * RFC7231#4.2.1:
294 * Of the request methods defined by this
295 * specification, the GET, HEAD, OPTIONS, and TRACE
296 * methods are defined to be safe.
297 */
298 if (likely(txn->meth == HTTP_METH_GET ||
299 txn->meth == HTTP_METH_HEAD ||
300 txn->meth == HTTP_METH_OPTIONS ||
301 txn->meth == HTTP_METH_TRACE))
302 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
303
304 /* end of job, return OK */
305 req->analysers &= ~an_bit;
306 req->analyse_exp = TICK_ETERNITY;
Christopher Faulet9768c262018-10-22 09:34:31 +0200307
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100308 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200309 return 1;
310
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200311 return_int_err:
312 txn->status = 500;
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200313 if (!(s->flags & SF_ERR_MASK))
314 s->flags |= SF_ERR_INTERNAL;
Willy Tarreau4781b152021-04-06 13:53:36 +0200315 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +0100316 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200317 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200318 goto return_prx_cond;
319
Christopher Faulete0768eb2018-10-03 16:38:02 +0200320 return_bad_req:
Christopher Faulet9768c262018-10-22 09:34:31 +0200321 txn->status = 400;
Willy Tarreau4781b152021-04-06 13:53:36 +0200322 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
William Lallemand36119de2021-03-08 15:26:48 +0100323 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200324 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200325 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200326
327 return_prx_cond:
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200328 http_reply_and_close(s, txn->status, http_error_message(s));
329
Christopher Faulete0768eb2018-10-03 16:38:02 +0200330 if (!(s->flags & SF_ERR_MASK))
331 s->flags |= SF_ERR_PRXCOND;
332 if (!(s->flags & SF_FINST_MASK))
333 s->flags |= SF_FINST_R;
334
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100335 DBG_TRACE_DEVEL("leaving on error",
336 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200337 return 0;
338}
339
340
341/* This stream analyser runs all HTTP request processing which is common to
342 * frontends and backends, which means blocking ACLs, filters, connection-close,
343 * reqadd, stats and redirects. This is performed for the designated proxy.
344 * It returns 1 if the processing can continue on next analysers, or zero if it
345 * either needs more data or wants to immediately abort the request (eg: deny,
346 * error, ...).
347 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200348int http_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200349{
350 struct session *sess = s->sess;
351 struct http_txn *txn = s->txn;
352 struct http_msg *msg = &txn->req;
Christopher Fauletff2759f2018-10-24 11:13:16 +0200353 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200354 struct redirect_rule *rule;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200355 enum rule_result verdict;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200356 struct connection *conn = objt_conn(sess->origin);
357
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100358 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200359
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100360 htx = htxbuf(&req->buf);
Christopher Fauletff2759f2018-10-24 11:13:16 +0200361
Christopher Faulet1907ccc2019-04-29 13:12:02 +0200362 /* just in case we have some per-backend tracking. Only called the first
363 * execution of the analyser. */
364 if (!s->current_rule || s->current_rule_list != &px->http_req_rules)
365 stream_inc_be_http_req_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200366
367 /* evaluate http-request rules */
368 if (!LIST_ISEMPTY(&px->http_req_rules)) {
Christopher Fauletb58f62b2020-01-13 16:40:13 +0100369 verdict = http_req_get_intercept_rule(px, &px->http_req_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200370
371 switch (verdict) {
372 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
373 goto return_prx_yield;
374
375 case HTTP_RULE_RES_CONT:
376 case HTTP_RULE_RES_STOP: /* nothing to do */
377 break;
378
379 case HTTP_RULE_RES_DENY: /* deny or tarpit */
380 if (txn->flags & TX_CLTARPIT)
381 goto tarpit;
382 goto deny;
383
384 case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */
385 goto return_prx_cond;
386
387 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
388 goto done;
389
390 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
391 goto return_bad_req;
Christopher Faulet3a26bee2019-12-16 12:47:40 +0100392
393 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
394 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200395 }
396 }
397
Christopher Faulet79507152022-05-16 11:43:10 +0200398 if (px->options2 & (PR_O2_RSTRICT_REQ_HDR_NAMES_BLK|PR_O2_RSTRICT_REQ_HDR_NAMES_DEL)) {
399 verdict = http_req_restrict_header_names(s, htx, px);
400 if (verdict == HTTP_RULE_RES_DENY)
401 goto deny;
402 }
403
Christopher Faulete0768eb2018-10-03 16:38:02 +0200404 if (conn && (conn->flags & CO_FL_EARLY_DATA) &&
Olivier Houchard220a26c2020-01-23 14:57:36 +0100405 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_SSL_WAIT_HS))) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200406 struct http_hdr_ctx ctx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200407
Christopher Fauletff2759f2018-10-24 11:13:16 +0200408 ctx.blk = NULL;
409 if (!http_find_header(htx, ist("Early-Data"), &ctx, 0)) {
410 if (unlikely(!http_add_header(htx, ist("Early-Data"), ist("1"))))
Christopher Faulet028c1642022-06-01 17:42:35 +0200411 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200412 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200413 }
414
415 /* OK at this stage, we know that the request was accepted according to
416 * the http-request rules, we can check for the stats. Note that the
417 * URI is detected *before* the req* rules in order not to be affected
418 * by a possible reqrep, while they are processed *after* so that a
419 * reqdeny can still block them. This clearly needs to change in 1.6!
420 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200421 if (!s->target && http_stats_check_uri(s, txn, px)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200422 s->target = &http_stats_applet.obj_type;
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100423 if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200424 s->logs.tv_request = now;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200425 if (!(s->flags & SF_ERR_MASK))
426 s->flags |= SF_ERR_RESOURCE;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100427 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200428 }
429
430 /* parse the whole stats request and extract the relevant information */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200431 http_handle_stats(s, req);
Christopher Fauletb58f62b2020-01-13 16:40:13 +0100432 verdict = http_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200433 /* not all actions implemented: deny, allow, auth */
434
435 if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */
436 goto deny;
437
438 if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */
439 goto return_prx_cond;
Christopher Faulet3a26bee2019-12-16 12:47:40 +0100440
441 if (verdict == HTTP_RULE_RES_BADREQ) /* failed with a bad request */
442 goto return_bad_req;
443
444 if (verdict == HTTP_RULE_RES_ERROR) /* failed with a bad request */
445 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200446 }
447
Christopher Faulet2571bc62019-03-01 11:44:26 +0100448 /* Proceed with the applets now. */
449 if (unlikely(objt_applet(s->target))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200450 if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
Willy Tarreau4781b152021-04-06 13:53:36 +0200451 _HA_ATOMIC_INC(&sess->fe->fe_counters.intercepted_req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200452
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200453 if (http_handle_expect_hdr(s, htx, msg) == -1)
Christopher Fauletb8a53712019-12-16 11:29:38 +0100454 goto return_int_err;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100455
Christopher Faulete0768eb2018-10-03 16:38:02 +0200456 if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is
457 s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy
458 if (!(s->flags & SF_FINST_MASK))
459 s->flags |= SF_FINST_R;
460
Christopher Fauletc2ac5e42021-03-08 18:20:09 +0100461 if (HAS_FILTERS(s))
462 req->analysers |= AN_REQ_FLT_HTTP_HDRS;
463
Christopher Faulete0768eb2018-10-03 16:38:02 +0200464 /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */
465 req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END);
466 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
467 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100468
469 req->flags |= CF_SEND_DONTWAIT;
470 s->flags |= SF_ASSIGNED;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200471 goto done;
472 }
473
474 /* check whether we have some ACLs set to redirect this request */
475 list_for_each_entry(rule, &px->redirect_rules, list) {
476 if (rule->cond) {
477 int ret;
478
479 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
480 ret = acl_pass(ret);
481 if (rule->cond->pol == ACL_COND_UNLESS)
482 ret = !ret;
483 if (!ret)
484 continue;
485 }
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200486 if (!http_apply_redirect_rule(rule, s, txn))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100487 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200488 goto done;
489 }
490
491 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
492 * If this happens, then the data will not come immediately, so we must
493 * send all what we have without waiting. Note that due to the small gain
494 * in waiting for the body of the request, it's easier to simply put the
495 * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
496 * itself once used.
497 */
498 req->flags |= CF_SEND_DONTWAIT;
499
500 done: /* done with this analyser, continue with next ones that the calling
501 * points will have set, if any.
502 */
503 req->analyse_exp = TICK_ETERNITY;
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +0500504 done_without_exp: /* done with this analyser, but don't reset the analyse_exp. */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200505 req->analysers &= ~an_bit;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100506 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200507 return 1;
508
509 tarpit:
510 /* Allow cookie logging
511 */
512 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200513 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200514
515 /* When a connection is tarpitted, we use the tarpit timeout,
516 * which may be the same as the connect timeout if unspecified.
517 * If unset, then set it to zero because we really want it to
518 * eventually expire. We build the tarpit as an analyser.
519 */
Christopher Faulet202c6ce2019-01-07 14:57:35 +0100520 channel_htx_erase(&s->req, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200521
522 /* wipe the request out so that we can drop the connection early
523 * if the client closes first.
524 */
525 channel_dont_connect(req);
526
Christopher Faulete0768eb2018-10-03 16:38:02 +0200527 req->analysers &= AN_REQ_FLT_END; /* remove switching rules etc... */
528 req->analysers |= AN_REQ_HTTP_TARPIT;
529 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
530 if (!req->analyse_exp)
531 req->analyse_exp = tick_add(now_ms, 0);
532 stream_inc_http_err_ctr(s);
Willy Tarreau4781b152021-04-06 13:53:36 +0200533 _HA_ATOMIC_INC(&sess->fe->fe_counters.denied_req);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100534 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreau4781b152021-04-06 13:53:36 +0200535 _HA_ATOMIC_INC(&s->be->be_counters.denied_req);
William Lallemand36119de2021-03-08 15:26:48 +0100536 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200537 _HA_ATOMIC_INC(&sess->listener->counters->denied_req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200538 goto done_without_exp;
539
540 deny: /* this request was blocked (denied) */
541
542 /* Allow cookie logging
543 */
544 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200545 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200546
Christopher Faulete0768eb2018-10-03 16:38:02 +0200547 s->logs.tv_request = now;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200548 stream_inc_http_err_ctr(s);
Willy Tarreau4781b152021-04-06 13:53:36 +0200549 _HA_ATOMIC_INC(&sess->fe->fe_counters.denied_req);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100550 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreau4781b152021-04-06 13:53:36 +0200551 _HA_ATOMIC_INC(&s->be->be_counters.denied_req);
William Lallemand36119de2021-03-08 15:26:48 +0100552 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200553 _HA_ATOMIC_INC(&sess->listener->counters->denied_req);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100554 goto return_prx_err;
555
Christopher Faulet028c1642022-06-01 17:42:35 +0200556 return_fail_rewrite:
557 if (!(s->flags & SF_ERR_MASK))
558 s->flags |= SF_ERR_PRXCOND;
559 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_rewrites);
560 if (s->flags & SF_BE_ASSIGNED)
561 _HA_ATOMIC_INC(&s->be->be_counters.failed_rewrites);
562 if (sess->listener && sess->listener->counters)
563 _HA_ATOMIC_INC(&sess->listener->counters->failed_rewrites);
564 if (objt_server(s->target))
565 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_rewrites);
566 /* fall through */
567
Christopher Fauletb8a53712019-12-16 11:29:38 +0100568 return_int_err:
569 txn->status = 500;
570 if (!(s->flags & SF_ERR_MASK))
571 s->flags |= SF_ERR_INTERNAL;
Willy Tarreau4781b152021-04-06 13:53:36 +0200572 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100573 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreau4781b152021-04-06 13:53:36 +0200574 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +0100575 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200576 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100577 goto return_prx_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200578
579 return_bad_req:
Christopher Faulete0768eb2018-10-03 16:38:02 +0200580 txn->status = 400;
Willy Tarreau4781b152021-04-06 13:53:36 +0200581 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
William Lallemand36119de2021-03-08 15:26:48 +0100582 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200583 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100584 /* fall through */
585
586 return_prx_err:
587 http_reply_and_close(s, txn->status, http_error_message(s));
588 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200589
590 return_prx_cond:
591 if (!(s->flags & SF_ERR_MASK))
592 s->flags |= SF_ERR_PRXCOND;
593 if (!(s->flags & SF_FINST_MASK))
594 s->flags |= SF_FINST_R;
595
596 req->analysers &= AN_REQ_FLT_END;
597 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100598 DBG_TRACE_DEVEL("leaving on error",
599 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200600 return 0;
601
602 return_prx_yield:
603 channel_dont_connect(req);
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100604 DBG_TRACE_DEVEL("waiting for more data",
605 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200606 return 0;
607}
608
609/* This function performs all the processing enabled for the current request.
610 * It returns 1 if the processing can continue on next analysers, or zero if it
611 * needs more data, encounters an error, or wants to immediately abort the
612 * request. It relies on buffers flags, and updates s->req.analysers.
613 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200614int http_process_request(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200615{
616 struct session *sess = s->sess;
617 struct http_txn *txn = s->txn;
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200618 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200619 struct connection *cli_conn = objt_conn(strm_sess(s)->origin);
620
Christopher Faulet8bebd2f2020-10-06 17:54:56 +0200621 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200622
623 /*
624 * Right now, we know that we have processed the entire headers
625 * and that unwanted requests have been filtered out. We can do
626 * whatever we want with the remaining request. Also, now we
627 * may have separate values for ->fe, ->be.
628 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100629 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200630
631 /*
632 * If HTTP PROXY is set we simply get remote server address parsing
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200633 * incoming request.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200634 */
635 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100636 struct htx_sl *sl;
637 struct ist uri, path;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200638
Willy Tarreau9b7587a2020-10-15 07:32:10 +0200639 if (!sockaddr_alloc(&s->target_addr, NULL, 0)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200640 if (!(s->flags & SF_ERR_MASK))
641 s->flags |= SF_ERR_RESOURCE;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100642 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200643 }
Christopher Faulet297fbb42019-05-13 14:41:27 +0200644 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100645 uri = htx_sl_req_uri(sl);
646 path = http_get_path(uri);
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200647
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200648 if (url2sa(uri.ptr, uri.len - path.len, s->target_addr, NULL) == -1)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200649 goto return_bad_req;
650
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200651 s->target = &s->be->obj_type;
652 s->flags |= SF_ADDR_SET | SF_ASSIGNED;
653
Christopher Faulete0768eb2018-10-03 16:38:02 +0200654 /* if the path was found, we have to remove everything between
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200655 * uri.ptr and path.ptr (excluded). If it was not found, we need
656 * to replace from all the uri by a single "/".
657 *
Ilya Shipitsin46a030c2020-07-05 16:36:08 +0500658 * Instead of rewriting the whole start line, we just update
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100659 * the star-line URI. Some space will be lost but it should be
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200660 * insignificant.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200661 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100662 istcpy(&uri, (path.len ? path : ist("/")), uri.len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200663 }
664
665 /*
666 * 7: Now we can work with the cookies.
667 * Note that doing so might move headers in the request, but
668 * the fields will stay coherent and the URI will not move.
669 * This should only be performed in the backend.
670 */
671 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200672 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200673
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100674 /* 8: Generate unique ID if a "unique-id-format" is defined.
675 *
676 * A unique ID is generated even when it is not sent to ensure that the ID can make use of
677 * fetches only available in the HTTP request processing stage.
678 */
679 if (!LIST_ISEMPTY(&sess->fe->format_unique_id)) {
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100680 struct ist unique_id = stream_generate_unique_id(s, &sess->fe->format_unique_id);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200681
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100682 if (!isttest(unique_id)) {
Christopher Fauletb8a53712019-12-16 11:29:38 +0100683 if (!(s->flags & SF_ERR_MASK))
684 s->flags |= SF_ERR_RESOURCE;
685 goto return_int_err;
686 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200687
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100688 /* send unique ID if a "unique-id-header" is defined */
Tim Duesterhus0643b0e2020-03-05 17:56:35 +0100689 if (isttest(sess->fe->header_unique_id) &&
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100690 unlikely(!http_add_header(htx, sess->fe->header_unique_id, s->unique_id)))
Christopher Faulet028c1642022-06-01 17:42:35 +0200691 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200692 }
693
694 /*
695 * 9: add X-Forwarded-For if either the frontend or the backend
696 * asks for it.
697 */
698 if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200699 struct http_hdr_ctx ctx = { .blk = NULL };
700 struct ist hdr = ist2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name,
701 s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len);
702
Christopher Faulete0768eb2018-10-03 16:38:02 +0200703 if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200704 http_find_header(htx, hdr, &ctx, 0)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200705 /* The header is set to be added only if none is present
706 * and we found it, so don't do anything.
707 */
708 }
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200709 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200710 /* Add an X-Forwarded-For header unless the source IP is
711 * in the 'except' network range.
712 */
Christopher Faulet5d1def62021-02-26 09:19:15 +0100713 if (ipcmp2net(cli_conn->src, &sess->fe->except_xff_net) &&
714 ipcmp2net(cli_conn->src, &s->be->except_xff_net)) {
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200715 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->src)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200716
717 /* Note: we rely on the backend to get the header name to be used for
718 * x-forwarded-for, because the header is really meant for the backends.
719 * However, if the backend did not specify any option, we have to rely
720 * on the frontend's header name.
721 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200722 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
723 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulet028c1642022-06-01 17:42:35 +0200724 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200725 }
726 }
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200727 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET6) {
Christopher Faulet5d1def62021-02-26 09:19:15 +0100728 /* Add an X-Forwarded-For header unless the source IP is
729 * in the 'except' network range.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200730 */
Christopher Faulet5d1def62021-02-26 09:19:15 +0100731 if (ipcmp2net(cli_conn->src, &sess->fe->except_xff_net) &&
732 ipcmp2net(cli_conn->src, &s->be->except_xff_net)) {
733 char pn[INET6_ADDRSTRLEN];
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200734
Christopher Faulet5d1def62021-02-26 09:19:15 +0100735 inet_ntop(AF_INET6,
736 (const void *)&((struct sockaddr_in6 *)(cli_conn->src))->sin6_addr,
737 pn, sizeof(pn));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200738
Christopher Faulet5d1def62021-02-26 09:19:15 +0100739 /* Note: we rely on the backend to get the header name to be used for
740 * x-forwarded-for, because the header is really meant for the backends.
741 * However, if the backend did not specify any option, we have to rely
742 * on the frontend's header name.
743 */
744 chunk_printf(&trash, "%s", pn);
745 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulet028c1642022-06-01 17:42:35 +0200746 goto return_fail_rewrite;
Christopher Faulet5d1def62021-02-26 09:19:15 +0100747 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200748 }
749 }
750
751 /*
752 * 10: add X-Original-To if either the frontend or the backend
753 * asks for it.
754 */
755 if ((sess->fe->options | s->be->options) & PR_O_ORGTO) {
Christopher Faulet5d1def62021-02-26 09:19:15 +0100756 struct ist hdr = ist2(s->be->orgto_hdr_len ? s->be->orgto_hdr_name : sess->fe->orgto_hdr_name,
757 s->be->orgto_hdr_len ? s->be->orgto_hdr_len : sess->fe->orgto_hdr_len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200758
Christopher Fauletcccded92021-02-26 12:45:56 +0100759 if (cli_conn && conn_get_dst(cli_conn) && cli_conn->dst->ss_family == AF_INET) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200760 /* Add an X-Original-To header unless the destination IP is
761 * in the 'except' network range.
762 */
Christopher Faulet5d1def62021-02-26 09:19:15 +0100763 if (ipcmp2net(cli_conn->dst, &sess->fe->except_xot_net) &&
764 ipcmp2net(cli_conn->dst, &s->be->except_xot_net)) {
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200765 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200766
767 /* Note: we rely on the backend to get the header name to be used for
768 * x-original-to, because the header is really meant for the backends.
769 * However, if the backend did not specify any option, we have to rely
770 * on the frontend's header name.
771 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200772 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
773 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulet028c1642022-06-01 17:42:35 +0200774 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200775 }
776 }
Christopher Faulet5d1def62021-02-26 09:19:15 +0100777 else if (cli_conn && conn_get_dst(cli_conn) && cli_conn->dst->ss_family == AF_INET6) {
778 /* Add an X-Original-To header unless the source IP is
779 * in the 'except' network range.
780 */
781 if (ipcmp2net(cli_conn->dst, &sess->fe->except_xot_net) &&
782 ipcmp2net(cli_conn->dst, &s->be->except_xot_net)) {
783 char pn[INET6_ADDRSTRLEN];
784
785 inet_ntop(AF_INET6,
786 (const void *)&((struct sockaddr_in6 *)(cli_conn->dst))->sin6_addr,
787 pn, sizeof(pn));
788
789 /* Note: we rely on the backend to get the header name to be used for
790 * x-forwarded-for, because the header is really meant for the backends.
791 * However, if the backend did not specify any option, we have to rely
792 * on the frontend's header name.
793 */
794 chunk_printf(&trash, "%s", pn);
795 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulet028c1642022-06-01 17:42:35 +0200796 goto return_fail_rewrite;
Christopher Faulet5d1def62021-02-26 09:19:15 +0100797 }
798 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200799 }
800
Christopher Fauletc2ac5e42021-03-08 18:20:09 +0100801 /* Filter the request headers if there are filters attached to the
802 * stream.
803 */
804 if (HAS_FILTERS(s))
805 req->analysers |= AN_REQ_FLT_HTTP_HDRS;
806
Christopher Faulete0768eb2018-10-03 16:38:02 +0200807 /* If we have no server assigned yet and we're balancing on url_param
808 * with a POST request, we may be interested in checking the body for
809 * that parameter. This will be done in another analyser.
810 */
811 if (!(s->flags & (SF_ASSIGNED|SF_DIRECT)) &&
Willy Tarreau089eaa02019-01-14 15:17:46 +0100812 s->txn->meth == HTTP_METH_POST &&
813 (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200814 channel_dont_connect(req);
815 req->analysers |= AN_REQ_HTTP_BODY;
816 }
817
818 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
819 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau1a18b542018-12-11 16:37:42 +0100820
Christopher Faulete0768eb2018-10-03 16:38:02 +0200821 /* We expect some data from the client. Unless we know for sure
822 * we already have a full request, we have to re-enable quick-ack
823 * in case we previously disabled it, otherwise we might cause
824 * the client to delay further data.
825 */
William Lallemand36119de2021-03-08 15:26:48 +0100826 if ((sess->listener && (sess->listener->options & LI_O_NOQUICKACK)) && !(htx->flags & HTX_FL_EOM))
Willy Tarreau1a18b542018-12-11 16:37:42 +0100827 conn_set_quickack(cli_conn, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200828
829 /*************************************************************
830 * OK, that's finished for the headers. We have done what we *
831 * could. Let's switch to the DATA state. *
832 ************************************************************/
833 req->analyse_exp = TICK_ETERNITY;
834 req->analysers &= ~an_bit;
835
836 s->logs.tv_request = now;
837 /* OK let's go on with the BODY now */
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100838 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200839 return 1;
840
Christopher Faulet028c1642022-06-01 17:42:35 +0200841 return_fail_rewrite:
842 if (!(s->flags & SF_ERR_MASK))
843 s->flags |= SF_ERR_PRXCOND;
844 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_rewrites);
845 if (s->flags & SF_BE_ASSIGNED)
846 _HA_ATOMIC_INC(&s->be->be_counters.failed_rewrites);
847 if (sess->listener && sess->listener->counters)
848 _HA_ATOMIC_INC(&sess->listener->counters->failed_rewrites);
849 if (objt_server(s->target))
850 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_rewrites);
851 /* fall through */
852
Christopher Fauletb8a53712019-12-16 11:29:38 +0100853 return_int_err:
854 txn->status = 500;
855 if (!(s->flags & SF_ERR_MASK))
856 s->flags |= SF_ERR_INTERNAL;
Willy Tarreau4781b152021-04-06 13:53:36 +0200857 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100858 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreau4781b152021-04-06 13:53:36 +0200859 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +0100860 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200861 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100862 goto return_prx_cond;
863
Christopher Faulete0768eb2018-10-03 16:38:02 +0200864 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200865 txn->status = 400;
Willy Tarreau4781b152021-04-06 13:53:36 +0200866 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
William Lallemand36119de2021-03-08 15:26:48 +0100867 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200868 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100869 /* fall through */
870
871 return_prx_cond:
872 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200873
874 if (!(s->flags & SF_ERR_MASK))
875 s->flags |= SF_ERR_PRXCOND;
876 if (!(s->flags & SF_FINST_MASK))
877 s->flags |= SF_FINST_R;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100878
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100879 DBG_TRACE_DEVEL("leaving on error",
880 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200881 return 0;
882}
883
884/* This function is an analyser which processes the HTTP tarpit. It always
885 * returns zero, at the beginning because it prevents any other processing
886 * from occurring, and at the end because it terminates the request.
887 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200888int http_process_tarpit(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200889{
890 struct http_txn *txn = s->txn;
891
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100892 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, &txn->req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200893 /* This connection is being tarpitted. The CLIENT side has
894 * already set the connect expiration date to the right
895 * timeout. We just have to check that the client is still
896 * there and that the timeout has not expired.
897 */
898 channel_dont_connect(req);
899 if ((req->flags & (CF_SHUTR|CF_READ_ERROR)) == 0 &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100900 !tick_is_expired(req->analyse_exp, now_ms)) {
Christopher Fauletb02d5f02021-10-29 14:37:07 +0200901 /* Be sure to drain all data from the request channel */
902 channel_htx_erase(req, htxbuf(&req->buf));
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100903 DBG_TRACE_DEVEL("waiting for tarpit timeout expiry",
904 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200905 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100906 }
907
Christopher Faulete0768eb2018-10-03 16:38:02 +0200908
909 /* We will set the queue timer to the time spent, just for
910 * logging purposes. We fake a 500 server error, so that the
911 * attacker will not suspect his connection has been tarpitted.
912 * It will not cause trouble to the logs because we can exclude
913 * the tarpitted connections by filtering on the 'PT' status flags.
914 */
915 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
916
Christopher Faulet8dfeccf2020-05-15 14:16:29 +0200917 http_reply_and_close(s, txn->status, (!(req->flags & CF_READ_ERROR) ? http_error_message(s) : NULL));
Christopher Faulet5cb513a2020-05-13 17:56:56 +0200918
Christopher Faulete0768eb2018-10-03 16:38:02 +0200919 if (!(s->flags & SF_ERR_MASK))
920 s->flags |= SF_ERR_PRXCOND;
921 if (!(s->flags & SF_FINST_MASK))
922 s->flags |= SF_FINST_T;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100923
924 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200925 return 0;
926}
927
928/* This function is an analyser which waits for the HTTP request body. It waits
929 * for either the buffer to be full, or the full advertised contents to have
930 * reached the buffer. It must only be called after the standard HTTP request
931 * processing has occurred, because it expects the request to be parsed and will
932 * look for the Expect header. It may send a 100-Continue interim response. It
933 * takes in input any state starting from HTTP_MSG_BODY and leaves with one of
934 * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it
935 * needs to read more data, or 1 once it has completed its analysis.
936 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200937int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200938{
939 struct session *sess = s->sess;
940 struct http_txn *txn = s->txn;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200941
Christopher Faulet1a023fa2023-01-13 10:49:31 +0100942 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, &s->txn->req);
Christopher Fauletf76ebe82018-10-24 11:16:22 +0200943
Christopher Fauletf76ebe82018-10-24 11:16:22 +0200944
Christopher Faulet021a8e42021-03-29 10:46:38 +0200945 switch (http_wait_for_msg_body(s, req, s->be->timeout.httpreq, 0)) {
946 case HTTP_RULE_RES_CONT:
947 goto http_end;
948 case HTTP_RULE_RES_YIELD:
949 goto missing_data_or_waiting;
950 case HTTP_RULE_RES_BADREQ:
Willy Tarreau4236f032019-03-05 10:43:32 +0100951 goto return_bad_req;
Christopher Faulet021a8e42021-03-29 10:46:38 +0200952 case HTTP_RULE_RES_ERROR:
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200953 goto return_int_err;
Christopher Faulet021a8e42021-03-29 10:46:38 +0200954 case HTTP_RULE_RES_ABRT:
Christopher Fauletb8a53712019-12-16 11:29:38 +0100955 goto return_prx_cond;
Christopher Faulet021a8e42021-03-29 10:46:38 +0200956 default:
957 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200958 }
959
960 http_end:
961 /* The situation will not evolve, so let's give up on the analysis. */
962 s->logs.tv_request = now; /* update the request timer to reflect full request */
963 req->analysers &= ~an_bit;
964 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100965 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200966 return 1;
967
Christopher Faulet021a8e42021-03-29 10:46:38 +0200968 missing_data_or_waiting:
969 channel_dont_connect(req);
970 DBG_TRACE_DEVEL("waiting for more data",
971 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
972 return 0;
973
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200974 return_int_err:
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200975 txn->status = 500;
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200976 if (!(s->flags & SF_ERR_MASK))
977 s->flags |= SF_ERR_INTERNAL;
Willy Tarreau4781b152021-04-06 13:53:36 +0200978 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100979 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreau4781b152021-04-06 13:53:36 +0200980 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +0100981 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200982 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Faulet021a8e42021-03-29 10:46:38 +0200983 goto return_prx_err;
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200984
Christopher Faulete0768eb2018-10-03 16:38:02 +0200985 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200986 txn->status = 400;
Willy Tarreau4781b152021-04-06 13:53:36 +0200987 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
William Lallemand36119de2021-03-08 15:26:48 +0100988 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +0200989 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100990 /* fall through */
991
Christopher Faulet021a8e42021-03-29 10:46:38 +0200992 return_prx_err:
Christopher Fauletb8a53712019-12-16 11:29:38 +0100993 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet021a8e42021-03-29 10:46:38 +0200994 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200995
Christopher Faulet021a8e42021-03-29 10:46:38 +0200996 return_prx_cond:
Christopher Faulete0768eb2018-10-03 16:38:02 +0200997 if (!(s->flags & SF_ERR_MASK))
998 s->flags |= SF_ERR_PRXCOND;
999 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet1a023fa2023-01-13 10:49:31 +01001000 s->flags |= SF_FINST_R;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001001
Christopher Faulete0768eb2018-10-03 16:38:02 +02001002 req->analysers &= AN_REQ_FLT_END;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001003 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001004 DBG_TRACE_DEVEL("leaving on error",
1005 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001006 return 0;
1007}
1008
1009/* This function is an analyser which forwards request body (including chunk
1010 * sizes if any). It is called as soon as we must forward, even if we forward
1011 * zero byte. The only situation where it must not be called is when we're in
1012 * tunnel mode and we want to forward till the close. It's used both to forward
1013 * remaining data and to resync after end of body. It expects the msg_state to
1014 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
1015 * read more data, or 1 once we can go on with next request or end the stream.
1016 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
1017 * bytes of pending data + the headers if not already done.
1018 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001019int http_request_forward_body(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001020{
1021 struct session *sess = s->sess;
1022 struct http_txn *txn = s->txn;
Christopher Faulet9768c262018-10-22 09:34:31 +02001023 struct http_msg *msg = &txn->req;
1024 struct htx *htx;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001025 short status = 0;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001026 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001027
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001028 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001029
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001030 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001031
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001032 if (htx->flags & HTX_FL_PARSING_ERROR)
1033 goto return_bad_req;
1034 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1035 goto return_int_err;
1036
Christopher Faulete0768eb2018-10-03 16:38:02 +02001037 if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
1038 ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) {
1039 /* Output closed while we were sending data. We must abort and
1040 * wake the other side up.
Christopher Fauletf506d962021-04-27 10:56:28 +02001041 *
1042 * If we have finished to send the request and the response is
1043 * still in progress, don't catch write error on the request
1044 * side if it is in fact a read error on the server side.
Christopher Faulete0768eb2018-10-03 16:38:02 +02001045 */
Christopher Fauletf506d962021-04-27 10:56:28 +02001046 if (msg->msg_state == HTTP_MSG_DONE && (s->res.flags & CF_READ_ERROR) && s->res.analysers)
1047 return 0;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001048
Olivier Houchard29cac3c2019-07-12 15:48:58 +02001049 /* Don't abort yet if we had L7 retries activated and it
1050 * was a write error, we may recover.
1051 */
1052 if (!(req->flags & (CF_READ_ERROR | CF_READ_TIMEOUT)) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001053 (s->si[1].flags & SI_FL_L7_RETRY)) {
1054 DBG_TRACE_DEVEL("leaving on L7 retry",
1055 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Olivier Houchard29cac3c2019-07-12 15:48:58 +02001056 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001057 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001058 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001059 http_end_request(s);
1060 http_end_response(s);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001061 DBG_TRACE_DEVEL("leaving on error",
1062 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001063 return 1;
1064 }
1065
1066 /* Note that we don't have to send 100-continue back because we don't
1067 * need the data to complete our job, and it's up to the server to
1068 * decide whether to return 100, 417 or anything else in return of
1069 * an "Expect: 100-continue" header.
1070 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001071 if (msg->msg_state == HTTP_MSG_BODY)
1072 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001073
Christopher Faulete0768eb2018-10-03 16:38:02 +02001074 /* in most states, we should abort in case of early close */
1075 channel_auto_close(req);
1076
1077 if (req->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01001078 if (req->to_forward == CHN_INFINITE_FORWARD) {
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001079 if (req->flags & CF_EOI)
1080 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01001081 }
1082 else {
1083 /* We can't process the buffer's contents yet */
1084 req->flags |= CF_WAKE_WRITE;
1085 goto missing_data_or_waiting;
1086 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001087 }
1088
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001089 if (msg->msg_state >= HTTP_MSG_ENDING)
1090 goto ending;
1091
1092 if (txn->meth == HTTP_METH_CONNECT) {
1093 msg->msg_state = HTTP_MSG_ENDING;
1094 goto ending;
1095 }
1096
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001097 /* Forward input data. We get it by removing all outgoing data not
1098 * forwarded yet from HTX data size. If there are some data filters, we
1099 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02001100 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001101 if (HAS_REQ_DATA_FILTERS(s)) {
1102 ret = flt_http_payload(s, msg, htx->data);
1103 if (ret < 0)
1104 goto return_bad_req;
Christopher Faulet421e7692019-06-13 11:16:45 +02001105 c_adv(req, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001106 }
1107 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02001108 c_adv(req, htx->data - co_data(req));
Christopher Faulet66af0b22019-03-22 14:54:52 +01001109 if (msg->flags & HTTP_MSGF_XFER_LEN)
1110 channel_htx_forward_forever(req, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001111 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001112
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001113 if (htx->data != co_data(req))
1114 goto missing_data_or_waiting;
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001115
Christopher Faulet9768c262018-10-22 09:34:31 +02001116 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001117 * in HTTP_MSG_ENDING state. Then if all data was marked to be
1118 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02001119 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01001120 if (!(htx->flags & HTX_FL_EOM))
Christopher Faulet9768c262018-10-22 09:34:31 +02001121 goto missing_data_or_waiting;
1122
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001123 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02001124
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001125 ending:
Christopher Faulet2151cdd2020-07-22 16:34:59 +02001126 req->flags &= ~CF_EXPECT_MORE; /* no more data are expected */
1127
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001128 /* other states, ENDING...TUNNEL */
1129 if (msg->msg_state >= HTTP_MSG_DONE)
1130 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001131
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001132 if (HAS_REQ_DATA_FILTERS(s)) {
1133 ret = flt_http_end(s, msg);
1134 if (ret <= 0) {
1135 if (!ret)
1136 goto missing_data_or_waiting;
1137 goto return_bad_req;
1138 }
1139 }
1140
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001141 if (txn->meth == HTTP_METH_CONNECT)
1142 msg->msg_state = HTTP_MSG_TUNNEL;
1143 else {
1144 msg->msg_state = HTTP_MSG_DONE;
1145 req->to_forward = 0;
1146 }
1147
1148 done:
1149 /* we don't want to forward closes on DONE except in tunnel mode. */
1150 if (!(txn->flags & TX_CON_WANT_TUN))
1151 channel_dont_close(req);
1152
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001153 http_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001154 if (!(req->analysers & an_bit)) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001155 http_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001156 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
1157 if (req->flags & CF_SHUTW) {
1158 /* request errors are most likely due to the
1159 * server aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01001160 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001161 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001162 goto return_bad_req;
1163 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001164 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001165 return 1;
1166 }
1167
1168 /* If "option abortonclose" is set on the backend, we want to monitor
1169 * the client's connection and forward any shutdown notification to the
1170 * server, which will decide whether to close or to go on processing the
1171 * request. We only do that in tunnel mode, and not in other modes since
1172 * it can be abused to exhaust source ports. */
Christopher Faulet769d0e92019-03-22 14:23:18 +01001173 if (s->be->options & PR_O_ABRT_CLOSE) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001174 channel_auto_read(req);
Christopher Fauletc41547b2019-07-16 14:32:23 +02001175 if ((req->flags & (CF_SHUTR|CF_READ_NULL)) && !(txn->flags & TX_CON_WANT_TUN))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001176 s->si[1].flags |= SI_FL_NOLINGER;
1177 channel_auto_close(req);
1178 }
1179 else if (s->txn->meth == HTTP_METH_POST) {
1180 /* POST requests may require to read extra CRLF sent by broken
1181 * browsers and which could cause an RST to be sent upon close
1182 * on some systems (eg: Linux). */
1183 channel_auto_read(req);
1184 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001185 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
1186 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001187 return 0;
1188
1189 missing_data_or_waiting:
1190 /* stop waiting for data if the input is closed before the end */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001191 if (msg->msg_state < HTTP_MSG_ENDING && req->flags & CF_SHUTR)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001192 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001193
1194 waiting:
1195 /* waiting for the last bits to leave the buffer */
1196 if (req->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001197 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001198
1199 /* When TE: chunked is used, we need to get there again to parse remaining
1200 * chunks even if the client has closed, so we don't want to set CF_DONTCLOSE.
1201 * And when content-length is used, we never want to let the possible
1202 * shutdown be forwarded to the other side, as the state machine will
1203 * take care of it once the client responds. It's also important to
1204 * prevent TIME_WAITs from accumulating on the backend side, and for
1205 * HTTP/2 where the last frame comes with a shutdown.
1206 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001207 if (msg->flags & HTTP_MSGF_XFER_LEN)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001208 channel_dont_close(req);
1209
1210 /* We know that more data are expected, but we couldn't send more that
1211 * what we did. So we always set the CF_EXPECT_MORE flag so that the
1212 * system knows it must not set a PUSH on this first part. Interactive
1213 * modes are already handled by the stream sock layer. We must not do
1214 * this in content-length mode because it could present the MSG_MORE
1215 * flag with the last block of forwarded data, which would cause an
1216 * additional delay to be observed by the receiver.
1217 */
Christopher Faulet2151cdd2020-07-22 16:34:59 +02001218 if (HAS_REQ_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001219 req->flags |= CF_EXPECT_MORE;
1220
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001221 DBG_TRACE_DEVEL("waiting for more data to forward",
1222 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001223 return 0;
1224
Christopher Faulet93e02d82019-03-08 14:18:50 +01001225 return_cli_abort:
Willy Tarreau4781b152021-04-06 13:53:36 +02001226 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
1227 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01001228 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001229 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001230 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001231 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001232 if (!(s->flags & SF_ERR_MASK))
1233 s->flags |= SF_ERR_CLICL;
1234 status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001235 goto return_prx_cond;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001236
1237 return_srv_abort:
Willy Tarreau4781b152021-04-06 13:53:36 +02001238 _HA_ATOMIC_INC(&sess->fe->fe_counters.srv_aborts);
1239 _HA_ATOMIC_INC(&s->be->be_counters.srv_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01001240 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001241 _HA_ATOMIC_INC(&sess->listener->counters->srv_aborts);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001242 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001243 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.srv_aborts);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001244 if (!(s->flags & SF_ERR_MASK))
1245 s->flags |= SF_ERR_SRVCL;
1246 status = 502;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001247 goto return_prx_cond;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001248
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001249 return_int_err:
1250 if (!(s->flags & SF_ERR_MASK))
1251 s->flags |= SF_ERR_INTERNAL;
Willy Tarreau4781b152021-04-06 13:53:36 +02001252 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
1253 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +01001254 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001255 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001256 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001257 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001258 status = 500;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001259 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001260
Christopher Faulet93e02d82019-03-08 14:18:50 +01001261 return_bad_req:
Willy Tarreau4781b152021-04-06 13:53:36 +02001262 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
William Lallemand36119de2021-03-08 15:26:48 +01001263 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001264 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001265 status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001266 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001267
Christopher Fauletb8a53712019-12-16 11:29:38 +01001268 return_prx_cond:
Christopher Faulet9768c262018-10-22 09:34:31 +02001269 if (txn->status > 0) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001270 /* Note: we don't send any error if some data were already sent */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001271 http_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001272 } else {
Christopher Faulet93e02d82019-03-08 14:18:50 +01001273 txn->status = status;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001274 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001275 }
Christopher Fauletb8a53712019-12-16 11:29:38 +01001276 if (!(s->flags & SF_ERR_MASK))
1277 s->flags |= SF_ERR_PRXCOND;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001278 if (!(s->flags & SF_FINST_MASK))
1279 s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001280 DBG_TRACE_DEVEL("leaving on error ",
1281 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001282 return 0;
1283}
1284
Olivier Houcharda254a372019-04-05 15:30:12 +02001285/* Reset the stream and the backend stream_interface to a situation suitable for attemption connection */
1286/* Returns 0 if we can attempt to retry, -1 otherwise */
1287static __inline int do_l7_retry(struct stream *s, struct stream_interface *si)
1288{
Christopher Faulet5bf85852021-05-21 13:46:14 +02001289 struct channel *req, *res;
1290 int co_data;
Olivier Houcharda254a372019-04-05 15:30:12 +02001291
1292 si->conn_retries--;
1293 if (si->conn_retries < 0)
Christopher Faulet043cdb22021-05-26 10:31:06 +02001294 return -1;
Christopher Faulet5b82cc52020-10-12 15:18:50 +02001295
Christopher Faulete763c8c2021-05-05 18:23:59 +02001296 if (objt_server(s->target)) {
1297 if (s->flags & SF_CURR_SESS) {
1298 s->flags &= ~SF_CURR_SESS;
1299 _HA_ATOMIC_DEC(&__objt_server(s->target)->cur_sess);
1300 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001301 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.retries);
Christopher Faulete763c8c2021-05-05 18:23:59 +02001302 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001303 _HA_ATOMIC_INC(&s->be->be_counters.retries);
Willy Tarreau223995e2019-05-04 10:38:31 +02001304
Christopher Faulet5bf85852021-05-21 13:46:14 +02001305 req = &s->req;
1306 res = &s->res;
Olivier Houcharda254a372019-04-05 15:30:12 +02001307 /* Remove any write error from the request, and read error from the response */
1308 req->flags &= ~(CF_WRITE_ERROR | CF_WRITE_TIMEOUT | CF_SHUTW | CF_SHUTW_NOW);
1309 res->flags &= ~(CF_READ_ERROR | CF_READ_TIMEOUT | CF_SHUTR | CF_EOI | CF_READ_NULL | CF_SHUTR_NOW);
Christopher Faulet42d4ee12022-01-04 10:56:03 +01001310 res->analysers &= AN_RES_FLT_END;
Olivier Houcharda254a372019-04-05 15:30:12 +02001311 si->flags &= ~(SI_FL_ERR | SI_FL_EXP | SI_FL_RXBLK_SHUT);
Christopher Faulet30aa0da2021-05-05 21:05:09 +02001312 si->err_type = SI_ET_NONE;
1313 s->flags &= ~(SF_ERR_MASK | SF_FINST_MASK);
Olivier Houchard4bd58672019-07-12 16:16:59 +02001314 stream_choose_redispatch(s);
Olivier Houcharda254a372019-04-05 15:30:12 +02001315 si->exp = TICK_ETERNITY;
1316 res->rex = TICK_ETERNITY;
1317 res->to_forward = 0;
1318 res->analyse_exp = TICK_ETERNITY;
1319 res->total = 0;
Olivier Houcharda254a372019-04-05 15:30:12 +02001320 si_release_endpoint(&s->si[1]);
Olivier Houcharda254a372019-04-05 15:30:12 +02001321
Christopher Faulet5bf85852021-05-21 13:46:14 +02001322 b_free(&req->buf);
1323 /* Swap the L7 buffer with the channel buffer */
1324 /* We know we stored the co_data as b_data, so get it there */
1325 co_data = b_data(&si->l7_buffer);
1326 b_set_data(&si->l7_buffer, b_size(&si->l7_buffer));
1327 b_xfer(&req->buf, &si->l7_buffer, b_data(&si->l7_buffer));
1328 co_set_data(req, co_data);
Christopher Faulet5b82cc52020-10-12 15:18:50 +02001329
Ilya Shipitsinacf84592021-02-06 22:29:08 +05001330 DBG_TRACE_DEVEL("perform a L7 retry", STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, s->txn);
Christopher Faulet5bf85852021-05-21 13:46:14 +02001331
Olivier Houcharda254a372019-04-05 15:30:12 +02001332 b_reset(&res->buf);
1333 co_set_data(res, 0);
1334 return 0;
1335}
1336
Christopher Faulete0768eb2018-10-03 16:38:02 +02001337/* This stream analyser waits for a complete HTTP response. It returns 1 if the
1338 * processing can continue on next analysers, or zero if it either needs more
1339 * data or wants to immediately abort the response (eg: timeout, error, ...). It
1340 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
1341 * when it has nothing left to do, and may remove any analyser when it wants to
1342 * abort.
1343 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001344int http_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001345{
Christopher Faulet9768c262018-10-22 09:34:31 +02001346 /*
1347 * We will analyze a complete HTTP response to check the its syntax.
1348 *
1349 * Once the start line and all headers are received, we may perform a
1350 * capture of the error (if any), and we will set a few fields. We also
1351 * logging and finally headers capture.
1352 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001353 struct session *sess = s->sess;
1354 struct http_txn *txn = s->txn;
1355 struct http_msg *msg = &txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02001356 struct htx *htx;
Olivier Houcharda254a372019-04-05 15:30:12 +02001357 struct stream_interface *si_b = &s->si[1];
Christopher Faulet61608322018-11-23 16:23:45 +01001358 struct connection *srv_conn;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001359 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001360 int n;
1361
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001362 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001363
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001364 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001365
Willy Tarreau4236f032019-03-05 10:43:32 +01001366 /* Parsing errors are caught here */
1367 if (htx->flags & HTX_FL_PARSING_ERROR)
1368 goto return_bad_res;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001369 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1370 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +01001371
Christopher Faulete0768eb2018-10-03 16:38:02 +02001372 /*
1373 * Now we quickly check if we have found a full valid response.
1374 * If not so, we check the FD and buffer states before leaving.
1375 * A full response is indicated by the fact that we have seen
1376 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
1377 * responses are checked first.
1378 *
1379 * Depending on whether the client is still there or not, we
1380 * may send an error response back or not. Note that normally
1381 * we should only check for HTTP status there, and check I/O
1382 * errors somewhere else.
1383 */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001384 next_one:
Christopher Faulet29f17582019-05-23 11:03:26 +02001385 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001386 /* 1: have we encountered a read error ? */
1387 if (rep->flags & CF_READ_ERROR) {
Olivier Houchard865d8392019-05-03 22:46:27 +02001388 struct connection *conn = NULL;
1389
Olivier Houchard865d8392019-05-03 22:46:27 +02001390 if (objt_cs(s->si[1].end))
Willy Tarreau66182592021-12-06 07:01:02 +00001391 conn = __objt_cs(s->si[1].end)->conn;
Olivier Houchard865d8392019-05-03 22:46:27 +02001392
Christopher Fauletb5265fe2023-03-01 15:47:18 +01001393 if ((si_b->flags & SI_FL_L7_RETRY) &&
1394 (s->be->retry_type & PR_RE_DISCONNECTED) &&
1395 (!conn || conn->err_code != CO_ER_SSL_EARLY_FAILED)) {
1396 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1397 return 0;
1398 }
1399
Christopher Fauletb1875342021-05-26 12:15:37 +02001400 /* Perform a L7 retry because server refuses the early data. */
1401 if ((si_b->flags & SI_FL_L7_RETRY) &&
1402 (s->be->retry_type & PR_RE_EARLY_ERROR) &&
1403 conn && conn->err_code == CO_ER_SSL_EARLY_FAILED &&
1404 do_l7_retry(s, si_b) == 0) {
1405 DBG_TRACE_DEVEL("leaving on L7 retry",
1406 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1407 return 0;
1408 }
1409
Olivier Houchard6db16992019-05-17 15:40:49 +02001410 if (txn->flags & TX_NOT_FIRST)
1411 goto abort_keep_alive;
1412
Willy Tarreau4781b152021-04-06 13:53:36 +02001413 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001414 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001415 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001416 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001417 }
1418
Christopher Fauletb1875342021-05-26 12:15:37 +02001419 /* if the server refused the early data, just send a 425 */
1420 if (conn && conn->err_code == CO_ER_SSL_EARLY_FAILED)
Olivier Houchard865d8392019-05-03 22:46:27 +02001421 txn->status = 425;
Christopher Fauletb1875342021-05-26 12:15:37 +02001422 else {
1423 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001424 stream_inc_http_fail_ctr(s);
Christopher Fauletb1875342021-05-26 12:15:37 +02001425 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001426
1427 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001428 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001429
1430 if (!(s->flags & SF_ERR_MASK))
1431 s->flags |= SF_ERR_SRVCL;
1432 if (!(s->flags & SF_FINST_MASK))
1433 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001434 DBG_TRACE_DEVEL("leaving on error",
1435 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001436 return 0;
1437 }
1438
Christopher Faulet9768c262018-10-22 09:34:31 +02001439 /* 2: read timeout : return a 504 to the client. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001440 else if (rep->flags & CF_READ_TIMEOUT) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001441 if ((si_b->flags & SI_FL_L7_RETRY) &&
1442 (s->be->retry_type & PR_RE_TIMEOUT)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001443 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1444 DBG_TRACE_DEVEL("leaving on L7 retry",
1445 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001446 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001447 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001448 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001449 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001450 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001451 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001452 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001453 }
1454
Christopher Faulete0768eb2018-10-03 16:38:02 +02001455 txn->status = 504;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001456 stream_inc_http_fail_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001457 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001458 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001459
1460 if (!(s->flags & SF_ERR_MASK))
1461 s->flags |= SF_ERR_SRVTO;
1462 if (!(s->flags & SF_FINST_MASK))
1463 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001464 DBG_TRACE_DEVEL("leaving on error",
1465 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001466 return 0;
1467 }
1468
Christopher Faulet9768c262018-10-22 09:34:31 +02001469 /* 3: client abort with an abortonclose */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001470 else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001471 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
1472 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01001473 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001474 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001475 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001476 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001477
Christopher Faulete0768eb2018-10-03 16:38:02 +02001478 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001479 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001480
1481 if (!(s->flags & SF_ERR_MASK))
1482 s->flags |= SF_ERR_CLICL;
1483 if (!(s->flags & SF_FINST_MASK))
1484 s->flags |= SF_FINST_H;
1485
1486 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001487 DBG_TRACE_DEVEL("leaving on error",
1488 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001489 return 0;
1490 }
1491
Christopher Faulet9768c262018-10-22 09:34:31 +02001492 /* 4: close from server, capture the response if the server has started to respond */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001493 else if (rep->flags & CF_SHUTR) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001494 if ((si_b->flags & SI_FL_L7_RETRY) &&
1495 (s->be->retry_type & PR_RE_DISCONNECTED)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001496 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1497 DBG_TRACE_DEVEL("leaving on L7 retry",
1498 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001499 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001500 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001501 }
1502
Olivier Houchard6db16992019-05-17 15:40:49 +02001503 if (txn->flags & TX_NOT_FIRST)
1504 goto abort_keep_alive;
1505
Willy Tarreau4781b152021-04-06 13:53:36 +02001506 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001507 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001508 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001509 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001510 }
1511
Christopher Faulete0768eb2018-10-03 16:38:02 +02001512 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001513 stream_inc_http_fail_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001514 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001515 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001516
1517 if (!(s->flags & SF_ERR_MASK))
1518 s->flags |= SF_ERR_SRVCL;
1519 if (!(s->flags & SF_FINST_MASK))
1520 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001521 DBG_TRACE_DEVEL("leaving on error",
1522 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001523 return 0;
1524 }
1525
Christopher Faulet9768c262018-10-22 09:34:31 +02001526 /* 5: write error to client (we don't send any message then) */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001527 else if (rep->flags & CF_WRITE_ERROR) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001528 if (txn->flags & TX_NOT_FIRST)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001529 goto abort_keep_alive;
1530
Willy Tarreau4781b152021-04-06 13:53:36 +02001531 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001532 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001533 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001534 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001535
1536 if (!(s->flags & SF_ERR_MASK))
1537 s->flags |= SF_ERR_CLICL;
1538 if (!(s->flags & SF_FINST_MASK))
1539 s->flags |= SF_FINST_H;
1540
1541 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001542 DBG_TRACE_DEVEL("leaving on error",
1543 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001544 return 0;
1545 }
1546
1547 channel_dont_close(rep);
1548 rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001549 DBG_TRACE_DEVEL("waiting for more data",
1550 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001551 return 0;
1552 }
1553
1554 /* More interesting part now : we know that we have a complete
1555 * response which at least looks like HTTP. We have an indicator
1556 * of each header's length, so we can parse them quickly.
1557 */
Christopher Faulet29f17582019-05-23 11:03:26 +02001558 BUG_ON(htx_get_first_type(htx) != HTX_BLK_RES_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +02001559 sl = http_get_stline(htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001560
Christopher Faulet0f66d552021-05-26 13:14:39 +02001561 /* Perform a L7 retry because of the status code */
1562 if ((si_b->flags & SI_FL_L7_RETRY) &&
1563 l7_status_match(s->be, sl->info.res.status) &&
1564 do_l7_retry(s, si_b) == 0) {
1565 DBG_TRACE_DEVEL("leaving on L7 retry", STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1566 return 0;
1567 }
1568
1569 /* Now, L7 buffer is useless, it can be released */
1570 b_free(&s->si[1].l7_buffer);
1571
1572 msg->msg_state = HTTP_MSG_BODY;
1573
1574
Christopher Faulet9768c262018-10-22 09:34:31 +02001575 /* 0: we might have to print this header in debug mode */
1576 if (unlikely((global.mode & MODE_DEBUG) &&
1577 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
1578 int32_t pos;
1579
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001580 http_debug_stline("srvrep", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +02001581
Christopher Fauleta3f15502019-05-13 15:27:23 +02001582 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001583 struct htx_blk *blk = htx_get_blk(htx, pos);
1584 enum htx_blk_type type = htx_get_blk_type(blk);
1585
1586 if (type == HTX_BLK_EOH)
1587 break;
1588 if (type != HTX_BLK_HDR)
1589 continue;
1590
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001591 http_debug_hdr("srvhdr", s,
1592 htx_get_blk_name(htx, blk),
1593 htx_get_blk_value(htx, blk));
Christopher Faulet9768c262018-10-22 09:34:31 +02001594 }
1595 }
1596
Christopher Faulet03599112018-11-27 11:21:21 +01001597 /* 1: get the status code and the version. Also set HTTP flags */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001598 txn->status = sl->info.res.status;
Christopher Faulet03599112018-11-27 11:21:21 +01001599 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +02001600 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +01001601 if (sl->flags & HTX_SL_F_XFER_LEN) {
1602 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet2a408542020-11-20 14:22:37 +01001603 if (sl->flags & HTX_SL_F_CLEN)
1604 msg->flags |= HTTP_MSGF_CNT_LEN;
1605 else if (sl->flags & HTX_SL_F_CHNK)
1606 msg->flags |= HTTP_MSGF_TE_CHNK;
Christopher Faulet03599112018-11-27 11:21:21 +01001607 }
Christopher Faulet2a408542020-11-20 14:22:37 +01001608 if (sl->flags & HTX_SL_F_BODYLESS)
1609 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulet576c3582021-01-08 15:53:01 +01001610 if (sl->flags & HTX_SL_F_CONN_UPG)
1611 msg->flags |= HTTP_MSGF_CONN_UPG;
Christopher Faulet9768c262018-10-22 09:34:31 +02001612
1613 n = txn->status / 100;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001614 if (n < 1 || n > 5)
1615 n = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001616
Christopher Faulete0768eb2018-10-03 16:38:02 +02001617 /* when the client triggers a 4xx from the server, it's most often due
1618 * to a missing object or permission. These events should be tracked
1619 * because if they happen often, it may indicate a brute force or a
1620 * vulnerability scan.
1621 */
1622 if (n == 4)
1623 stream_inc_http_err_ctr(s);
1624
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001625 if (n == 5 && txn->status != 501 && txn->status != 505)
1626 stream_inc_http_fail_ctr(s);
1627
Marcin Deranek3c27dda2020-05-15 18:32:51 +02001628 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001629 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.p.http.rsp[n]);
1630 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.p.http.cum_req);
Marcin Deranek3c27dda2020-05-15 18:32:51 +02001631 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001632
Christopher Faulete0768eb2018-10-03 16:38:02 +02001633 /* Adjust server's health based on status code. Note: status codes 501
1634 * and 505 are triggered on demand by client request, so we must not
1635 * count them as server failures.
1636 */
1637 if (objt_server(s->target)) {
1638 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001639 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001640 else
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001641 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001642 }
1643
1644 /*
1645 * We may be facing a 100-continue response, or any other informational
1646 * 1xx response which is non-final, in which case this is not the right
1647 * response, and we're waiting for the next one. Let's allow this response
1648 * to go to the client and wait for the next one. There's an exception for
1649 * 101 which is used later in the code to switch protocols.
1650 */
1651 if (txn->status < 200 &&
1652 (txn->status == 100 || txn->status >= 102)) {
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001653 FLT_STRM_CB(s, flt_http_reset(s, msg));
Christopher Faulet421e7692019-06-13 11:16:45 +02001654 htx->first = channel_htx_fwd_headers(rep, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001655 msg->msg_state = HTTP_MSG_RPBEFORE;
Christopher Faulet3499f622019-09-03 15:23:54 +02001656 msg->flags = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001657 txn->status = 0;
1658 s->logs.t_data = -1; /* was not a response yet */
Christopher Faulet7d518452020-08-31 11:07:07 +02001659 rep->flags |= CF_SEND_DONTWAIT; /* Send ASAP informational messages */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001660 goto next_one;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001661 }
1662
Christopher Faulet6e6c7b12021-01-08 16:02:05 +01001663 /* A 101-switching-protocols must contains a Connection header with the
1664 * "upgrade" option and the request too. It means both are agree to
1665 * upgrade. It is not so strict because there is no test on the Upgrade
1666 * header content. But it is probably stronger enough for now.
1667 */
1668 if (txn->status == 101 &&
1669 (!(txn->req.flags & HTTP_MSGF_CONN_UPG) || !(txn->rsp.flags & HTTP_MSGF_CONN_UPG)))
1670 goto return_bad_res;
1671
Christopher Faulete0768eb2018-10-03 16:38:02 +02001672 /*
1673 * 2: check for cacheability.
1674 */
1675
1676 switch (txn->status) {
1677 case 200:
1678 case 203:
1679 case 204:
1680 case 206:
1681 case 300:
1682 case 301:
1683 case 404:
1684 case 405:
1685 case 410:
1686 case 414:
1687 case 501:
1688 break;
1689 default:
1690 /* RFC7231#6.1:
1691 * Responses with status codes that are defined as
1692 * cacheable by default (e.g., 200, 203, 204, 206,
1693 * 300, 301, 404, 405, 410, 414, and 501 in this
1694 * specification) can be reused by a cache with
1695 * heuristic expiration unless otherwise indicated
1696 * by the method definition or explicit cache
1697 * controls [RFC7234]; all other status codes are
1698 * not cacheable by default.
1699 */
1700 txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
1701 break;
1702 }
1703
1704 /*
1705 * 3: we may need to capture headers
1706 */
1707 s->logs.logwait &= ~LW_RESP;
1708 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001709 http_capture_headers(htx, s->res_cap, sess->fe->rsp_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001710
Christopher Faulet9768c262018-10-22 09:34:31 +02001711 /* Skip parsing if no content length is possible. */
Christopher Fauletc75668e2020-12-07 18:10:32 +01001712 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) ||
Christopher Faulete0768eb2018-10-03 16:38:02 +02001713 txn->status == 101)) {
1714 /* Either we've established an explicit tunnel, or we're
1715 * switching the protocol. In both cases, we're very unlikely
1716 * to understand the next protocols. We have to switch to tunnel
1717 * mode, so that we transfer the request and responses then let
1718 * this protocol pass unmodified. When we later implement specific
1719 * parsers for such protocols, we'll want to check the Upgrade
1720 * header which contains information about that protocol for
1721 * responses with status 101 (eg: see RFC2817 about TLS).
1722 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02001723 txn->flags |= TX_CON_WANT_TUN;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001724 }
1725
Christopher Faulet61608322018-11-23 16:23:45 +01001726 /* check for NTML authentication headers in 401 (WWW-Authenticate) and
1727 * 407 (Proxy-Authenticate) responses and set the connection to private
1728 */
1729 srv_conn = cs_conn(objt_cs(s->si[1].end));
1730 if (srv_conn) {
1731 struct ist hdr;
1732 struct http_hdr_ctx ctx;
1733
1734 if (txn->status == 401)
1735 hdr = ist("WWW-Authenticate");
1736 else if (txn->status == 407)
1737 hdr = ist("Proxy-Authenticate");
1738 else
1739 goto end;
1740
1741 ctx.blk = NULL;
1742 while (http_find_header(htx, hdr, &ctx, 0)) {
Willy Tarreauf1dcced2020-05-07 19:27:02 +02001743 /* If www-authenticate contains "Negotiate", "Nego2", or "NTLM",
1744 * possibly followed by blanks and a base64 string, the connection
1745 * is private. Since it's a mess to deal with, we only check for
1746 * values starting with "NTLM" or "Nego". Note that often multiple
1747 * headers are sent by the server there.
1748 */
1749 if ((ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "Nego", 4) == 0) ||
Willy Tarreau49a1d282020-05-07 19:10:15 +02001750 (ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "NTLM", 4) == 0)) {
Olivier Houchard250031e2019-05-29 15:01:50 +02001751 sess->flags |= SESS_FL_PREFER_LAST;
Christopher Faulet08016ab2020-07-01 16:10:06 +02001752 conn_set_owner(srv_conn, sess, NULL);
Christopher Faulet21ddc742020-07-01 15:26:14 +02001753 conn_set_private(srv_conn);
Ilya Shipitsin6b79f382020-07-23 00:32:55 +05001754 /* If it fail now, the same will be done in mux->detach() callback */
Christopher Faulet08016ab2020-07-01 16:10:06 +02001755 session_add_conn(srv_conn->owner, srv_conn, srv_conn->target);
Willy Tarreauf1dcced2020-05-07 19:27:02 +02001756 break;
Olivier Houchard250031e2019-05-29 15:01:50 +02001757 }
Christopher Faulet61608322018-11-23 16:23:45 +01001758 }
1759 }
1760
1761 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001762 /* we want to have the response time before we start processing it */
1763 s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
1764
1765 /* end of job, return OK */
1766 rep->analysers &= ~an_bit;
1767 rep->analyse_exp = TICK_ETERNITY;
1768 channel_auto_close(rep);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001769 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001770 return 1;
1771
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001772 return_int_err:
Willy Tarreau4781b152021-04-06 13:53:36 +02001773 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
1774 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +01001775 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001776 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001777 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001778 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001779 txn->status = 500;
1780 if (!(s->flags & SF_ERR_MASK))
1781 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001782 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001783
1784 return_bad_res:
Willy Tarreau4781b152021-04-06 13:53:36 +02001785 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulet47365272018-10-31 17:40:50 +01001786 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001787 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001788 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
Christopher Faulet47365272018-10-31 17:40:50 +01001789 }
Olivier Houcharde3249a92019-05-03 23:01:47 +02001790 if ((s->be->retry_type & PR_RE_JUNK_REQUEST) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001791 (si_b->flags & SI_FL_L7_RETRY) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001792 do_l7_retry(s, si_b) == 0) {
1793 DBG_TRACE_DEVEL("leaving on L7 retry",
1794 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharde3249a92019-05-03 23:01:47 +02001795 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001796 }
Christopher Faulet47365272018-10-31 17:40:50 +01001797 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001798 stream_inc_http_fail_ctr(s);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001799 /* fall through */
1800
Christopher Fauletb8a53712019-12-16 11:29:38 +01001801 return_prx_cond:
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001802 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet47365272018-10-31 17:40:50 +01001803
1804 if (!(s->flags & SF_ERR_MASK))
1805 s->flags |= SF_ERR_PRXCOND;
1806 if (!(s->flags & SF_FINST_MASK))
1807 s->flags |= SF_FINST_H;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001808
1809 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001810 DBG_TRACE_DEVEL("leaving on error",
1811 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulet47365272018-10-31 17:40:50 +01001812 return 0;
1813
Christopher Faulete0768eb2018-10-03 16:38:02 +02001814 abort_keep_alive:
1815 /* A keep-alive request to the server failed on a network error.
1816 * The client is required to retry. We need to close without returning
1817 * any other information so that the client retries.
1818 */
1819 txn->status = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001820 s->logs.logwait = 0;
1821 s->logs.level = 0;
1822 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001823 http_reply_and_close(s, txn->status, NULL);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001824 DBG_TRACE_DEVEL("leaving by closing K/A connection",
1825 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001826 return 0;
1827}
1828
1829/* This function performs all the processing enabled for the current response.
1830 * It normally returns 1 unless it wants to break. It relies on buffers flags,
1831 * and updates s->res.analysers. It might make sense to explode it into several
1832 * other functions. It works like process_request (see indications above).
1833 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001834int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001835{
1836 struct session *sess = s->sess;
1837 struct http_txn *txn = s->txn;
1838 struct http_msg *msg = &txn->rsp;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001839 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001840 struct proxy *cur_proxy;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001841 enum rule_result ret = HTTP_RULE_RES_CONT;
1842
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001843 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
1844 return 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001845
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001846 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001847
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001848 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001849
1850 /* The stats applet needs to adjust the Connection header but we don't
1851 * apply any filter there.
1852 */
1853 if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
1854 rep->analysers &= ~an_bit;
1855 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001856 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001857 }
1858
1859 /*
1860 * We will have to evaluate the filters.
1861 * As opposed to version 1.2, now they will be evaluated in the
1862 * filters order and not in the header order. This means that
1863 * each filter has to be validated among all headers.
1864 *
1865 * Filters are tried with ->be first, then with ->fe if it is
1866 * different from ->be.
1867 *
1868 * Maybe we are in resume condiion. In this case I choose the
1869 * "struct proxy" which contains the rule list matching the resume
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001870 * pointer. If none of these "struct proxy" match, I initialise
Christopher Faulete0768eb2018-10-03 16:38:02 +02001871 * the process with the first one.
1872 *
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001873 * In fact, I check only correspondence between the current list
Christopher Faulete0768eb2018-10-03 16:38:02 +02001874 * pointer and the ->fe rule list. If it doesn't match, I initialize
1875 * the loop with the ->be.
1876 */
1877 if (s->current_rule_list == &sess->fe->http_res_rules)
1878 cur_proxy = sess->fe;
1879 else
1880 cur_proxy = s->be;
1881 while (1) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001882 /* evaluate http-response rules */
Christopher Fauletb4c4a972021-11-09 16:33:25 +01001883 if (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001884 ret = http_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001885
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001886 switch (ret) {
1887 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
1888 goto return_prx_yield;
1889
1890 case HTTP_RULE_RES_CONT:
1891 case HTTP_RULE_RES_STOP: /* nothing to do */
1892 break;
1893
1894 case HTTP_RULE_RES_DENY: /* deny or tarpit */
1895 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001896
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001897 case HTTP_RULE_RES_ABRT: /* abort request, response already sent */
1898 goto return_prx_cond;
1899
1900 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
Christopher Fauletb8a53712019-12-16 11:29:38 +01001901 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001902
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001903 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
1904 goto return_bad_res;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001905
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001906 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
1907 goto return_int_err;
1908 }
1909
1910 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001911
Christopher Faulete0768eb2018-10-03 16:38:02 +02001912 /* check whether we're already working on the frontend */
1913 if (cur_proxy == sess->fe)
1914 break;
1915 cur_proxy = sess->fe;
1916 }
1917
Christopher Faulete0768eb2018-10-03 16:38:02 +02001918 /* OK that's all we can do for 1xx responses */
1919 if (unlikely(txn->status < 200 && txn->status != 101))
Christopher Fauletf2824e62018-10-01 12:12:37 +02001920 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001921
1922 /*
1923 * Now check for a server cookie.
1924 */
1925 if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001926 http_manage_server_side_cookies(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001927
1928 /*
1929 * Check for cache-control or pragma headers if required.
1930 */
1931 if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001932 http_check_response_for_cacheability(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001933
1934 /*
1935 * Add server cookie in the response if needed
1936 */
1937 if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
1938 !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
1939 (!(s->flags & SF_DIRECT) ||
1940 ((s->be->cookie_maxidle || txn->cookie_last_date) &&
1941 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
1942 (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
1943 (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
1944 (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
1945 !(s->flags & SF_IGNORE_PRST)) {
1946 /* the server is known, it's not the one the client requested, or the
1947 * cookie's last seen date needs to be refreshed. We have to
1948 * insert a set-cookie here, except if we want to insert only on POST
1949 * requests and this one isn't. Note that servers which don't have cookies
1950 * (eg: some backup servers) will return a full cookie removal request.
1951 */
Willy Tarreau66182592021-12-06 07:01:02 +00001952 if (!__objt_server(s->target)->cookie) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001953 chunk_printf(&trash,
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001954 "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
Christopher Faulete0768eb2018-10-03 16:38:02 +02001955 s->be->cookie_name);
1956 }
1957 else {
Willy Tarreau66182592021-12-06 07:01:02 +00001958 chunk_printf(&trash, "%s=%s", s->be->cookie_name, __objt_server(s->target)->cookie);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001959
1960 if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
1961 /* emit last_date, which is mandatory */
1962 trash.area[trash.data++] = COOKIE_DELIM_DATE;
1963 s30tob64((date.tv_sec+3) >> 2,
1964 trash.area + trash.data);
1965 trash.data += 5;
1966
1967 if (s->be->cookie_maxlife) {
1968 /* emit first_date, which is either the original one or
1969 * the current date.
1970 */
1971 trash.area[trash.data++] = COOKIE_DELIM_DATE;
1972 s30tob64(txn->cookie_first_date ?
1973 txn->cookie_first_date >> 2 :
1974 (date.tv_sec+3) >> 2,
1975 trash.area + trash.data);
1976 trash.data += 5;
1977 }
1978 }
1979 chunk_appendf(&trash, "; path=/");
1980 }
1981
1982 if (s->be->cookie_domain)
1983 chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
1984
1985 if (s->be->ck_opts & PR_CK_HTTPONLY)
1986 chunk_appendf(&trash, "; HttpOnly");
1987
1988 if (s->be->ck_opts & PR_CK_SECURE)
1989 chunk_appendf(&trash, "; Secure");
1990
Christopher Faulet2f533902020-01-21 11:06:48 +01001991 if (s->be->cookie_attrs)
1992 chunk_appendf(&trash, "; %s", s->be->cookie_attrs);
1993
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001994 if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data))))
Christopher Faulet028c1642022-06-01 17:42:35 +02001995 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001996
1997 txn->flags &= ~TX_SCK_MASK;
1998 if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
1999 /* the server did not change, only the date was updated */
2000 txn->flags |= TX_SCK_UPDATED;
2001 else
2002 txn->flags |= TX_SCK_INSERTED;
2003
2004 /* Here, we will tell an eventual cache on the client side that we don't
2005 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
2006 * Some caches understand the correct form: 'no-cache="set-cookie"', but
2007 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
2008 */
2009 if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
2010
2011 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
2012
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002013 if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private"))))
Christopher Faulet028c1642022-06-01 17:42:35 +02002014 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002015 }
2016 }
2017
2018 /*
2019 * Check if result will be cacheable with a cookie.
2020 * We'll block the response if security checks have caught
2021 * nasty things such as a cacheable cookie.
2022 */
2023 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
2024 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
2025 (s->be->options & PR_O_CHK_CACHE)) {
2026 /* we're in presence of a cacheable response containing
2027 * a set-cookie header. We'll block it as requested by
2028 * the 'checkcache' option, and send an alert.
2029 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002030 ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau66182592021-12-06 07:01:02 +00002031 s->be->id, objt_server(s->target) ? __objt_server(s->target)->id : "<dispatch>");
Christopher Faulete0768eb2018-10-03 16:38:02 +02002032 send_log(s->be, LOG_ALERT,
2033 "Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau66182592021-12-06 07:01:02 +00002034 s->be->id, objt_server(s->target) ? __objt_server(s->target)->id : "<dispatch>");
Christopher Fauletb8a53712019-12-16 11:29:38 +01002035 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002036 }
2037
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002038 end:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002039 /*
2040 * Evaluate after-response rules before forwarding the response. rules
2041 * from the backend are evaluated first, then one from the frontend if
2042 * it differs.
2043 */
2044 if (!http_eval_after_res_rules(s))
2045 goto return_int_err;
2046
Christopher Fauletc2ac5e42021-03-08 18:20:09 +01002047 /* Filter the response headers if there are filters attached to the
2048 * stream.
2049 */
2050 if (HAS_FILTERS(s))
2051 rep->analysers |= AN_RES_FLT_HTTP_HDRS;
2052
Christopher Faulete0768eb2018-10-03 16:38:02 +02002053 /* Always enter in the body analyzer */
2054 rep->analysers &= ~AN_RES_FLT_XFER_DATA;
2055 rep->analysers |= AN_RES_HTTP_XFER_BODY;
2056
2057 /* if the user wants to log as soon as possible, without counting
2058 * bytes from the server, then this is the right moment. We have
2059 * to temporarily assign bytes_out to log what we currently have.
2060 */
2061 if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
2062 s->logs.t_close = s->logs.t_data; /* to get a valid end date */
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002063 s->logs.bytes_out = htx->data;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002064 s->do_log(s);
2065 s->logs.bytes_out = 0;
2066 }
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002067
Christopher Fauletb8a53712019-12-16 11:29:38 +01002068 done:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002069 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002070 rep->analysers &= ~an_bit;
2071 rep->analyse_exp = TICK_ETERNITY;
2072 return 1;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002073
Christopher Fauletb8a53712019-12-16 11:29:38 +01002074 deny:
Willy Tarreau4781b152021-04-06 13:53:36 +02002075 _HA_ATOMIC_INC(&sess->fe->fe_counters.denied_resp);
2076 _HA_ATOMIC_INC(&s->be->be_counters.denied_resp);
William Lallemand36119de2021-03-08 15:26:48 +01002077 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002078 _HA_ATOMIC_INC(&sess->listener->counters->denied_resp);
Christopher Fauleta08546b2019-12-16 16:07:34 +01002079 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002080 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.denied_resp);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002081 goto return_prx_err;
2082
Christopher Faulet028c1642022-06-01 17:42:35 +02002083 return_fail_rewrite:
2084 if (!(s->flags & SF_ERR_MASK))
2085 s->flags |= SF_ERR_PRXCOND;
2086 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_rewrites);
2087 _HA_ATOMIC_INC(&s->be->be_counters.failed_rewrites);
2088 if (sess->listener && sess->listener->counters)
2089 _HA_ATOMIC_INC(&sess->listener->counters->failed_rewrites);
2090 if (objt_server(s->target))
2091 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_rewrites);
2092 /* fall through */
2093
Christopher Fauletb8a53712019-12-16 11:29:38 +01002094 return_int_err:
2095 txn->status = 500;
2096 if (!(s->flags & SF_ERR_MASK))
2097 s->flags |= SF_ERR_INTERNAL;
Willy Tarreau4781b152021-04-06 13:53:36 +02002098 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
2099 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
Dragan Dosen84426cd2021-09-21 13:02:09 +02002100 if (sess->listener && sess->listener->counters)
2101 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002102 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002103 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002104 goto return_prx_err;
2105
2106 return_bad_res:
2107 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01002108 stream_inc_http_fail_ctr(s);
Willy Tarreau4781b152021-04-06 13:53:36 +02002109 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Fauleta20a6532020-02-05 10:16:41 +01002110 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02002111 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Christopher Fauleta20a6532020-02-05 10:16:41 +01002112 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2113 }
Christopher Fauletb8a53712019-12-16 11:29:38 +01002114 /* fall through */
2115
2116 return_prx_err:
2117 http_reply_and_close(s, txn->status, http_error_message(s));
2118 /* fall through */
2119
2120 return_prx_cond:
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002121 s->logs.t_data = -1; /* was not a valid response */
2122 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002123
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002124 if (!(s->flags & SF_ERR_MASK))
2125 s->flags |= SF_ERR_PRXCOND;
2126 if (!(s->flags & SF_FINST_MASK))
2127 s->flags |= SF_FINST_H;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002128
Christopher Faulete58c0002020-03-02 16:21:01 +01002129 rep->analysers &= AN_RES_FLT_END;
2130 s->req.analysers &= AN_REQ_FLT_END;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002131 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002132 DBG_TRACE_DEVEL("leaving on error",
2133 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002134 return 0;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002135
2136 return_prx_yield:
2137 channel_dont_close(rep);
2138 DBG_TRACE_DEVEL("waiting for more data",
2139 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2140 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002141}
2142
2143/* This function is an analyser which forwards response body (including chunk
2144 * sizes if any). It is called as soon as we must forward, even if we forward
2145 * zero byte. The only situation where it must not be called is when we're in
2146 * tunnel mode and we want to forward till the close. It's used both to forward
2147 * remaining data and to resync after end of body. It expects the msg_state to
2148 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
2149 * read more data, or 1 once we can go on with next request or end the stream.
2150 *
2151 * It is capable of compressing response data both in content-length mode and
2152 * in chunked mode. The state machines follows different flows depending on
2153 * whether content-length and chunked modes are used, since there are no
2154 * trailers in content-length :
2155 *
2156 * chk-mode cl-mode
2157 * ,----- BODY -----.
2158 * / \
2159 * V size > 0 V chk-mode
2160 * .--> SIZE -------------> DATA -------------> CRLF
2161 * | | size == 0 | last byte |
2162 * | v final crlf v inspected |
2163 * | TRAILERS -----------> DONE |
2164 * | |
2165 * `----------------------------------------------'
2166 *
2167 * Compression only happens in the DATA state, and must be flushed in final
2168 * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
2169 * is performed at once on final states for all bytes parsed, or when leaving
2170 * on missing data.
2171 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002172int http_response_forward_body(struct stream *s, struct channel *res, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02002173{
2174 struct session *sess = s->sess;
2175 struct http_txn *txn = s->txn;
2176 struct http_msg *msg = &s->txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02002177 struct htx *htx;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002178 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002179
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002180 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002181
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002182 htx = htxbuf(&res->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002183
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002184 if (htx->flags & HTX_FL_PARSING_ERROR)
2185 goto return_bad_res;
2186 if (htx->flags & HTX_FL_PROCESSING_ERROR)
2187 goto return_int_err;
2188
Christopher Faulete0768eb2018-10-03 16:38:02 +02002189 if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
Christopher Fauletf2824e62018-10-01 12:12:37 +02002190 ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002191 /* Output closed while we were sending data. We must abort and
2192 * wake the other side up.
2193 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002194 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002195 http_end_response(s);
2196 http_end_request(s);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002197 DBG_TRACE_DEVEL("leaving on error",
2198 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002199 return 1;
2200 }
2201
Christopher Faulet9768c262018-10-22 09:34:31 +02002202 if (msg->msg_state == HTTP_MSG_BODY)
2203 msg->msg_state = HTTP_MSG_DATA;
2204
Christopher Faulete0768eb2018-10-03 16:38:02 +02002205 /* in most states, we should abort in case of early close */
2206 channel_auto_close(res);
2207
Christopher Faulete0768eb2018-10-03 16:38:02 +02002208 if (res->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01002209 if (res->to_forward == CHN_INFINITE_FORWARD) {
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002210 if (res->flags & CF_EOI)
2211 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01002212 }
2213 else {
2214 /* We can't process the buffer's contents yet */
2215 res->flags |= CF_WAKE_WRITE;
2216 goto missing_data_or_waiting;
2217 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002218 }
2219
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002220 if (msg->msg_state >= HTTP_MSG_ENDING)
2221 goto ending;
2222
Christopher Fauletc75668e2020-12-07 18:10:32 +01002223 if ((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) || txn->status == 101 ||
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002224 (!(msg->flags & HTTP_MSGF_XFER_LEN) && !HAS_RSP_DATA_FILTERS(s))) {
2225 msg->msg_state = HTTP_MSG_ENDING;
2226 goto ending;
2227 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002228
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002229 /* Forward input data. We get it by removing all outgoing data not
2230 * forwarded yet from HTX data size. If there are some data filters, we
2231 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02002232 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002233 if (HAS_RSP_DATA_FILTERS(s)) {
2234 ret = flt_http_payload(s, msg, htx->data);
2235 if (ret < 0)
2236 goto return_bad_res;
Christopher Faulet421e7692019-06-13 11:16:45 +02002237 c_adv(res, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002238 }
2239 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02002240 c_adv(res, htx->data - co_data(res));
Christopher Faulet66af0b22019-03-22 14:54:52 +01002241 if (msg->flags & HTTP_MSGF_XFER_LEN)
2242 channel_htx_forward_forever(res, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002243 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002244
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002245 if (htx->data != co_data(res))
2246 goto missing_data_or_waiting;
2247
2248 if (!(msg->flags & HTTP_MSGF_XFER_LEN) && res->flags & CF_SHUTR) {
2249 msg->msg_state = HTTP_MSG_ENDING;
2250 goto ending;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002251 }
2252
Christopher Faulet9768c262018-10-22 09:34:31 +02002253 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002254 * in HTTP_MSG_ENDING state. Then if all data was marked to be
2255 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02002256 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01002257 if (!(htx->flags & HTX_FL_EOM))
Christopher Faulet9768c262018-10-22 09:34:31 +02002258 goto missing_data_or_waiting;
2259
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002260 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02002261
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002262 ending:
Christopher Faulet2151cdd2020-07-22 16:34:59 +02002263 res->flags &= ~CF_EXPECT_MORE; /* no more data are expected */
2264
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002265 /* other states, ENDING...TUNNEL */
2266 if (msg->msg_state >= HTTP_MSG_DONE)
2267 goto done;
Christopher Faulet9768c262018-10-22 09:34:31 +02002268
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002269 if (HAS_RSP_DATA_FILTERS(s)) {
2270 ret = flt_http_end(s, msg);
2271 if (ret <= 0) {
2272 if (!ret)
2273 goto missing_data_or_waiting;
2274 goto return_bad_res;
2275 }
2276 }
2277
Christopher Fauletc75668e2020-12-07 18:10:32 +01002278 if ((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) || txn->status == 101 ||
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002279 !(msg->flags & HTTP_MSGF_XFER_LEN)) {
2280 msg->msg_state = HTTP_MSG_TUNNEL;
2281 goto ending;
2282 }
2283 else {
2284 msg->msg_state = HTTP_MSG_DONE;
2285 res->to_forward = 0;
2286 }
2287
2288 done:
2289
2290 channel_dont_close(res);
2291
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002292 http_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002293 if (!(res->analysers & an_bit)) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002294 http_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002295 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2296 if (res->flags & CF_SHUTW) {
2297 /* response errors are most likely due to the
2298 * client aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002299 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002300 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002301 goto return_bad_res;
2302 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002303 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002304 return 1;
2305 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002306 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
2307 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002308 return 0;
2309
2310 missing_data_or_waiting:
2311 if (res->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01002312 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002313
2314 /* stop waiting for data if the input is closed before the end. If the
2315 * client side was already closed, it means that the client has aborted,
2316 * so we don't want to count this as a server abort. Otherwise it's a
2317 * server abort.
2318 */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002319 if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002320 if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002321 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002322 /* If we have some pending data, we continue the processing */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002323 if (htx_is_empty(htx))
2324 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002325 }
2326
Christopher Faulete0768eb2018-10-03 16:38:02 +02002327 /* When TE: chunked is used, we need to get there again to parse
2328 * remaining chunks even if the server has closed, so we don't want to
Christopher Faulet9768c262018-10-22 09:34:31 +02002329 * set CF_DONTCLOSE. Similarly when there is a content-leng or if there
2330 * are filters registered on the stream, we don't want to forward a
2331 * close
Christopher Faulete0768eb2018-10-03 16:38:02 +02002332 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002333 if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002334 channel_dont_close(res);
2335
2336 /* We know that more data are expected, but we couldn't send more that
2337 * what we did. So we always set the CF_EXPECT_MORE flag so that the
2338 * system knows it must not set a PUSH on this first part. Interactive
2339 * modes are already handled by the stream sock layer. We must not do
2340 * this in content-length mode because it could present the MSG_MORE
2341 * flag with the last block of forwarded data, which would cause an
2342 * additional delay to be observed by the receiver.
2343 */
Christopher Faulet2151cdd2020-07-22 16:34:59 +02002344 if (HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002345 res->flags |= CF_EXPECT_MORE;
2346
2347 /* the stream handler will take care of timeouts and errors */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002348 DBG_TRACE_DEVEL("waiting for more data to forward",
2349 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002350 return 0;
2351
Christopher Faulet93e02d82019-03-08 14:18:50 +01002352 return_srv_abort:
Willy Tarreau4781b152021-04-06 13:53:36 +02002353 _HA_ATOMIC_INC(&sess->fe->fe_counters.srv_aborts);
2354 _HA_ATOMIC_INC(&s->be->be_counters.srv_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01002355 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002356 _HA_ATOMIC_INC(&sess->listener->counters->srv_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002357 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002358 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.srv_aborts);
Willy Tarreau826f3ab2021-02-10 12:07:15 +01002359 stream_inc_http_fail_ctr(s);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002360 if (!(s->flags & SF_ERR_MASK))
2361 s->flags |= SF_ERR_SRVCL;
2362 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002363
Christopher Faulet93e02d82019-03-08 14:18:50 +01002364 return_cli_abort:
Willy Tarreau4781b152021-04-06 13:53:36 +02002365 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
2366 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01002367 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002368 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002369 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002370 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002371 if (!(s->flags & SF_ERR_MASK))
2372 s->flags |= SF_ERR_CLICL;
2373 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002374
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002375 return_int_err:
Willy Tarreau4781b152021-04-06 13:53:36 +02002376 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
2377 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +01002378 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002379 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002380 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002381 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002382 if (!(s->flags & SF_ERR_MASK))
2383 s->flags |= SF_ERR_INTERNAL;
2384 goto return_error;
2385
Christopher Faulet93e02d82019-03-08 14:18:50 +01002386 return_bad_res:
Willy Tarreau4781b152021-04-06 13:53:36 +02002387 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002388 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02002389 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002390 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2391 }
Willy Tarreau826f3ab2021-02-10 12:07:15 +01002392 stream_inc_http_fail_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002393 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002394 s->flags |= SF_ERR_SRVCL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002395 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002396
Christopher Faulet93e02d82019-03-08 14:18:50 +01002397 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002398 /* don't send any error message as we're in the body */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002399 http_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002400 if (!(s->flags & SF_FINST_MASK))
2401 s->flags |= SF_FINST_D;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002402 DBG_TRACE_DEVEL("leaving on error",
2403 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002404 return 0;
2405}
2406
Christopher Fauletf2824e62018-10-01 12:12:37 +02002407/* Perform an HTTP redirect based on the information in <rule>. The function
Christopher Faulet99daf282018-11-28 22:58:13 +01002408 * returns zero on success, or zero in case of a, irrecoverable error such
Christopher Fauletf2824e62018-10-01 12:12:37 +02002409 * as too large a request to build a valid response.
2410 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002411int http_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
Christopher Fauletf2824e62018-10-01 12:12:37 +02002412{
Christopher Faulet99daf282018-11-28 22:58:13 +01002413 struct channel *req = &s->req;
2414 struct channel *res = &s->res;
2415 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01002416 struct htx_sl *sl;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002417 struct buffer *chunk;
Christopher Faulet99daf282018-11-28 22:58:13 +01002418 struct ist status, reason, location;
2419 unsigned int flags;
Christopher Faulet08e66462019-05-23 16:44:59 +02002420 int close = 0; /* Try to keep the connection alive byt default */
Christopher Fauletf2824e62018-10-01 12:12:37 +02002421
2422 chunk = alloc_trash_chunk();
Christopher Fauletb8a53712019-12-16 11:29:38 +01002423 if (!chunk) {
2424 if (!(s->flags & SF_ERR_MASK))
2425 s->flags |= SF_ERR_RESOURCE;
Christopher Faulet99daf282018-11-28 22:58:13 +01002426 goto fail;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002427 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002428
Christopher Faulet99daf282018-11-28 22:58:13 +01002429 /*
2430 * Create the location
2431 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002432 htx = htxbuf(&req->buf);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002433 switch(rule->type) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002434 case REDIRECT_TYPE_SCHEME: {
2435 struct http_hdr_ctx ctx;
2436 struct ist path, host;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002437
Christopher Faulet99daf282018-11-28 22:58:13 +01002438 host = ist("");
2439 ctx.blk = NULL;
2440 if (http_find_header(htx, ist("Host"), &ctx, 0))
2441 host = ctx.value;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002442
Christopher Faulet297fbb42019-05-13 14:41:27 +02002443 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002444 path = http_get_path(htx_sl_req_uri(sl));
2445 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002446 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002447 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++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002455 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002456 }
2457 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002458 else
2459 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002460
Christopher Faulet99daf282018-11-28 22:58:13 +01002461 if (rule->rdr_str) { /* this is an old "redirect" rule */
2462 /* add scheme */
2463 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2464 goto fail;
2465 }
2466 else {
2467 /* add scheme with executing log format */
2468 chunk->data += build_logline(s, chunk->area + chunk->data,
2469 chunk->size - chunk->data,
2470 &rule->rdr_fmt);
2471 }
2472 /* add "://" + host + path */
2473 if (!chunk_memcat(chunk, "://", 3) ||
2474 !chunk_memcat(chunk, host.ptr, host.len) ||
2475 !chunk_memcat(chunk, path.ptr, path.len))
2476 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002477
Christopher Faulet99daf282018-11-28 22:58:13 +01002478 /* append a slash at the end of the location if needed and missing */
2479 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2480 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2481 if (chunk->data + 1 >= chunk->size)
2482 goto fail;
2483 chunk->area[chunk->data++] = '/';
2484 }
2485 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002486 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002487
Christopher Faulet99daf282018-11-28 22:58:13 +01002488 case REDIRECT_TYPE_PREFIX: {
2489 struct ist path;
2490
Christopher Faulet297fbb42019-05-13 14:41:27 +02002491 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002492 path = http_get_path(htx_sl_req_uri(sl));
2493 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002494 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002495 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2496 int qs = 0;
2497 while (qs < path.len) {
2498 if (*(path.ptr + qs) == '?') {
2499 path.len = qs;
2500 break;
2501 }
2502 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002503 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002504 }
2505 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002506 else
2507 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002508
Christopher Faulet99daf282018-11-28 22:58:13 +01002509 if (rule->rdr_str) { /* this is an old "redirect" rule */
2510 /* add prefix. Note that if prefix == "/", we don't want to
2511 * add anything, otherwise it makes it hard for the user to
2512 * configure a self-redirection.
2513 */
2514 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
2515 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2516 goto fail;
2517 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002518 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002519 else {
2520 /* add prefix with executing log format */
2521 chunk->data += build_logline(s, chunk->area + chunk->data,
2522 chunk->size - chunk->data,
2523 &rule->rdr_fmt);
2524 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002525
Christopher Faulet99daf282018-11-28 22:58:13 +01002526 /* add path */
2527 if (!chunk_memcat(chunk, path.ptr, path.len))
2528 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002529
Christopher Faulet99daf282018-11-28 22:58:13 +01002530 /* append a slash at the end of the location if needed and missing */
2531 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2532 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2533 if (chunk->data + 1 >= chunk->size)
2534 goto fail;
2535 chunk->area[chunk->data++] = '/';
2536 }
2537 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002538 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002539 case REDIRECT_TYPE_LOCATION:
2540 default:
2541 if (rule->rdr_str) { /* this is an old "redirect" rule */
2542 /* add location */
2543 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2544 goto fail;
2545 }
2546 else {
2547 /* add location with executing log format */
2548 chunk->data += build_logline(s, chunk->area + chunk->data,
2549 chunk->size - chunk->data,
2550 &rule->rdr_fmt);
2551 }
2552 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002553 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002554 location = ist2(chunk->area, chunk->data);
2555
2556 /*
2557 * Create the 30x response
2558 */
2559 switch (rule->code) {
2560 case 308:
2561 status = ist("308");
2562 reason = ist("Permanent Redirect");
2563 break;
2564 case 307:
2565 status = ist("307");
2566 reason = ist("Temporary Redirect");
2567 break;
2568 case 303:
2569 status = ist("303");
2570 reason = ist("See Other");
2571 break;
2572 case 301:
2573 status = ist("301");
2574 reason = ist("Moved Permanently");
2575 break;
2576 case 302:
2577 default:
2578 status = ist("302");
2579 reason = ist("Found");
2580 break;
2581 }
2582
Christopher Faulet08e66462019-05-23 16:44:59 +02002583 if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE)
2584 close = 1;
2585
Christopher Faulet99daf282018-11-28 22:58:13 +01002586 htx = htx_from_buf(&res->buf);
Kevin Zhu96b36392020-01-07 09:42:55 +01002587 /* Trim any possible response */
2588 channel_htx_truncate(&s->res, htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002589 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2590 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason);
2591 if (!sl)
2592 goto fail;
2593 sl->info.res.status = rule->code;
2594 s->txn->status = rule->code;
2595
Christopher Faulet08e66462019-05-23 16:44:59 +02002596 if (close && !htx_add_header(htx, ist("Connection"), ist("close")))
2597 goto fail;
2598
2599 if (!htx_add_header(htx, ist("Content-length"), ist("0")) ||
Christopher Faulet99daf282018-11-28 22:58:13 +01002600 !htx_add_header(htx, ist("Location"), location))
2601 goto fail;
2602
2603 if (rule->code == 302 || rule->code == 303 || rule->code == 307) {
2604 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")))
2605 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002606 }
2607
2608 if (rule->cookie_len) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002609 if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len)))
2610 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002611 }
2612
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01002613 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet99daf282018-11-28 22:58:13 +01002614 goto fail;
2615
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01002616 htx->flags |= HTX_FL_EOM;
Kevin Zhu96b36392020-01-07 09:42:55 +01002617 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01002618 if (!http_forward_proxy_resp(s, 1))
2619 goto fail;
Christopher Faulet99daf282018-11-28 22:58:13 +01002620
Christopher Faulet60b33a52020-01-28 09:18:10 +01002621 if (rule->flags & REDIRECT_FLAG_FROM_REQ) {
2622 /* let's log the request time */
2623 s->logs.tv_request = now;
Christopher Faulet91322272021-10-04 14:16:46 +02002624 req->analysers &= AN_REQ_FLT_END;
Christopher Faulet99daf282018-11-28 22:58:13 +01002625
Christopher Faulet60b33a52020-01-28 09:18:10 +01002626 if (s->sess->fe == s->be) /* report it if the request was intercepted by the frontend */
Willy Tarreau4781b152021-04-06 13:53:36 +02002627 _HA_ATOMIC_INC(&s->sess->fe->fe_counters.intercepted_req);
Christopher Faulet60b33a52020-01-28 09:18:10 +01002628 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002629
2630 if (!(s->flags & SF_ERR_MASK))
2631 s->flags |= SF_ERR_LOCAL;
2632 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet60b33a52020-01-28 09:18:10 +01002633 s->flags |= ((rule->flags & REDIRECT_FLAG_FROM_REQ) ? SF_FINST_R : SF_FINST_H);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002634
Christopher Faulet99daf282018-11-28 22:58:13 +01002635 free_trash_chunk(chunk);
2636 return 1;
2637
2638 fail:
2639 /* If an error occurred, remove the incomplete HTTP response from the
2640 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002641 channel_htx_truncate(res, htxbuf(&res->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02002642 free_trash_chunk(chunk);
Christopher Faulet99daf282018-11-28 22:58:13 +01002643 return 0;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002644}
2645
Christopher Faulet79507152022-05-16 11:43:10 +02002646/* This function filters the request header names to only allow [0-9a-zA-Z-]
2647 * characters. Depending on the proxy configuration, headers with a name not
2648 * matching this charset are removed or the request is rejected with a
2649 * 403-Forbidden response if such name are found. It returns HTTP_RULE_RES_CONT
2650 * to continue the request processing or HTTP_RULE_RES_DENY if the request is
2651 * rejected.
2652 */
2653static enum rule_result http_req_restrict_header_names(struct stream *s, struct htx *htx, struct proxy *px)
2654{
2655 struct htx_blk *blk;
2656 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
2657
2658 blk = htx_get_first_blk(htx);
2659 while (blk) {
2660 enum htx_blk_type type = htx_get_blk_type(blk);
2661
2662 if (type == HTX_BLK_HDR) {
2663 struct ist n = htx_get_blk_name(htx, blk);
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002664 int i, end = istlen(n);
Christopher Faulet79507152022-05-16 11:43:10 +02002665
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002666 for (i = 0; i < end; i++) {
Christopher Faulet79507152022-05-16 11:43:10 +02002667 if (!isalnum((unsigned char)n.ptr[i]) && n.ptr[i] != '-') {
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002668 break;
Christopher Faulet79507152022-05-16 11:43:10 +02002669 }
2670 }
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002671
2672 if (i < end) {
2673 /* Disallowed character found - block the request or remove the header */
2674 if (px->options2 & PR_O2_RSTRICT_REQ_HDR_NAMES_BLK)
2675 goto block;
2676 blk = htx_remove_blk(htx, blk);
2677 continue;
2678 }
Christopher Faulet79507152022-05-16 11:43:10 +02002679 }
2680 if (type == HTX_BLK_EOH)
2681 break;
2682
2683 blk = htx_get_next_blk(htx, blk);
2684 }
2685 out:
2686 return rule_ret;
2687 block:
2688 /* Block the request returning a 403-Forbidden response */
2689 s->txn->status = 403;
2690 rule_ret = HTTP_RULE_RES_DENY;
2691 goto out;
2692}
2693
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002694/* Replace all headers matching the name <name>. The header value is replaced if
2695 * it matches the regex <re>. <str> is used for the replacement. If <full> is
2696 * set to 1, the full-line is matched and replaced. Otherwise, comma-separated
2697 * values are evaluated one by one. It returns 0 on success and -1 on error.
2698 */
2699int http_replace_hdrs(struct stream* s, struct htx *htx, struct ist name,
2700 const char *str, struct my_regex *re, int full)
Christopher Faulet72333522018-10-24 11:25:02 +02002701{
2702 struct http_hdr_ctx ctx;
2703 struct buffer *output = get_trash_chunk();
2704
Christopher Faulet72333522018-10-24 11:25:02 +02002705 ctx.blk = NULL;
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002706 while (http_find_header(htx, name, &ctx, full)) {
Christopher Faulet72333522018-10-24 11:25:02 +02002707 if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0))
2708 continue;
2709
2710 output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch);
2711 if (output->data == -1)
2712 return -1;
2713 if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data)))
2714 return -1;
2715 }
2716 return 0;
2717}
2718
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002719/* This function executes one of the set-{method,path,query,uri} actions. It
2720 * takes the string from the variable 'replace' with length 'len', then modifies
2721 * the relevant part of the request line accordingly. Then it updates various
2722 * pointers to the next elements which were moved, and the total buffer length.
2723 * It finds the action to be performed in p[2], previously filled by function
2724 * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
2725 * error, though this can be revisited when this code is finally exploited.
2726 *
2727 * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
Christopher Faulet312294f2020-09-02 17:17:44 +02002728 * query string, 3 to replace uri or 4 to replace the path+query.
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002729 *
2730 * In query string case, the mark question '?' must be set at the start of the
2731 * string by the caller, event if the replacement query string is empty.
2732 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002733int http_req_replace_stline(int action, const char *replace, int len,
2734 struct proxy *px, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002735{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002736 struct htx *htx = htxbuf(&s->req.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002737
2738 switch (action) {
2739 case 0: // method
2740 if (!http_replace_req_meth(htx, ist2(replace, len)))
2741 return -1;
2742 break;
2743
2744 case 1: // path
Christopher Fauletb8ce5052020-08-31 16:11:57 +02002745 if (!http_replace_req_path(htx, ist2(replace, len), 0))
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002746 return -1;
2747 break;
2748
2749 case 2: // query
2750 if (!http_replace_req_query(htx, ist2(replace, len)))
2751 return -1;
2752 break;
2753
2754 case 3: // uri
2755 if (!http_replace_req_uri(htx, ist2(replace, len)))
2756 return -1;
2757 break;
2758
Christopher Faulet312294f2020-09-02 17:17:44 +02002759 case 4: // path + query
2760 if (!http_replace_req_path(htx, ist2(replace, len), 1))
2761 return -1;
2762 break;
2763
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002764 default:
2765 return -1;
2766 }
2767 return 0;
2768}
2769
2770/* This function replace the HTTP status code and the associated message. The
Christopher Faulete00d06c2019-12-16 17:18:42 +01002771 * variable <status> contains the new status code. This function never fails. It
2772 * returns 0 in case of success, -1 in case of internal error.
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002773 */
Christopher Faulet96bff762019-12-17 13:46:18 +01002774int http_res_set_status(unsigned int status, struct ist reason, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002775{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002776 struct htx *htx = htxbuf(&s->res.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002777 char *res;
2778
2779 chunk_reset(&trash);
2780 res = ultoa_o(status, trash.area, trash.size);
2781 trash.data = res - trash.area;
2782
2783 /* Do we have a custom reason format string? */
Tim Duesterhuse296d3e2020-03-05 17:56:31 +01002784 if (!isttest(reason)) {
Christopher Faulet96bff762019-12-17 13:46:18 +01002785 const char *str = http_get_reason(status);
Tim Duesterhusdcf753a2021-03-04 17:31:47 +01002786 reason = ist(str);
Christopher Faulet96bff762019-12-17 13:46:18 +01002787 }
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002788
Christopher Fauletbde2c4c2020-08-31 16:43:34 +02002789 if (!http_replace_res_status(htx, ist2(trash.area, trash.data), reason))
Christopher Faulete00d06c2019-12-16 17:18:42 +01002790 return -1;
Willy Tarreaubed299a2023-01-10 14:50:44 +01002791 s->txn->status = status;
Christopher Faulete00d06c2019-12-16 17:18:42 +01002792 return 0;
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002793}
2794
Christopher Faulet3e964192018-10-24 11:39:23 +02002795/* Executes the http-request rules <rules> for stream <s>, proxy <px> and
2796 * transaction <txn>. Returns the verdict of the first rule that prevents
2797 * further processing of the request (auth, deny, ...), and defaults to
2798 * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
2799 * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
2800 * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
2801 * and a deny/tarpit rule is matched, it will be filled with this rule's deny
2802 * status.
2803 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002804static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules,
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002805 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002806{
2807 struct session *sess = strm_sess(s);
2808 struct http_txn *txn = s->txn;
Christopher Faulet3e964192018-10-24 11:39:23 +02002809 struct act_rule *rule;
Christopher Faulet3e964192018-10-24 11:39:23 +02002810 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002811 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002812
Christopher Faulet3e964192018-10-24 11:39:23 +02002813 /* If "the current_rule_list" match the executed rule list, we are in
2814 * resume condition. If a resume is needed it is always in the action
2815 * and never in the ACL or converters. In this case, we initialise the
2816 * current rule, and go to the action execution point.
2817 */
2818 if (s->current_rule) {
2819 rule = s->current_rule;
2820 s->current_rule = NULL;
2821 if (s->current_rule_list == rules)
2822 goto resume_execution;
2823 }
2824 s->current_rule_list = rules;
2825
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002826 /* start the ruleset evaluation in strict mode */
2827 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002828
Christopher Faulet3e964192018-10-24 11:39:23 +02002829 list_for_each_entry(rule, rules, list) {
2830 /* check optional condition */
2831 if (rule->cond) {
2832 int ret;
2833
2834 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
2835 ret = acl_pass(ret);
2836
2837 if (rule->cond->pol == ACL_COND_UNLESS)
2838 ret = !ret;
2839
2840 if (!ret) /* condition not matched */
2841 continue;
2842 }
2843
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002844 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02002845 resume_execution:
Amaury Denoyelle03517732021-05-07 14:25:01 +02002846 if (rule->kw->flags & KWF_EXPERIMENTAL)
2847 mark_tainted(TAINTED_ACTION_EXP_EXECUTED);
2848
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002849 /* Always call the action function if defined */
2850 if (rule->action_ptr) {
2851 if ((s->req.flags & CF_READ_ERROR) ||
2852 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
2853 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002854 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002855
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002856 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002857 case ACT_RET_CONT:
2858 break;
2859 case ACT_RET_STOP:
2860 rule_ret = HTTP_RULE_RES_STOP;
2861 goto end;
2862 case ACT_RET_YIELD:
2863 s->current_rule = rule;
2864 rule_ret = HTTP_RULE_RES_YIELD;
2865 goto end;
2866 case ACT_RET_ERR:
2867 rule_ret = HTTP_RULE_RES_ERROR;
2868 goto end;
2869 case ACT_RET_DONE:
2870 rule_ret = HTTP_RULE_RES_DONE;
2871 goto end;
2872 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002873 if (txn->status == -1)
2874 txn->status = 403;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002875 rule_ret = HTTP_RULE_RES_DENY;
2876 goto end;
2877 case ACT_RET_ABRT:
2878 rule_ret = HTTP_RULE_RES_ABRT;
2879 goto end;
2880 case ACT_RET_INV:
2881 rule_ret = HTTP_RULE_RES_BADREQ;
2882 goto end;
2883 }
2884 continue; /* eval the next rule */
2885 }
2886
2887 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02002888 switch (rule->action) {
2889 case ACT_ACTION_ALLOW:
2890 rule_ret = HTTP_RULE_RES_STOP;
2891 goto end;
2892
2893 case ACT_ACTION_DENY:
Christopher Faulet5cb513a2020-05-13 17:56:56 +02002894 txn->status = rule->arg.http_reply->status;
2895 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3e964192018-10-24 11:39:23 +02002896 rule_ret = HTTP_RULE_RES_DENY;
2897 goto end;
2898
2899 case ACT_HTTP_REQ_TARPIT:
2900 txn->flags |= TX_CLTARPIT;
Christopher Faulet5cb513a2020-05-13 17:56:56 +02002901 txn->status = rule->arg.http_reply->status;
2902 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3e964192018-10-24 11:39:23 +02002903 rule_ret = HTTP_RULE_RES_DENY;
2904 goto end;
2905
Christopher Faulet3e964192018-10-24 11:39:23 +02002906 case ACT_HTTP_REDIR:
Christopher Faulet90d22a82020-03-06 11:18:39 +01002907 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002908 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01002909 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02002910 goto end;
2911
2912 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01002913 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002914 break;
2915
2916 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01002917 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002918 break;
2919
2920 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01002921 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002922 break;
2923
2924 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01002925 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002926 break;
2927
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002928 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02002929 default:
2930 break;
2931 }
2932 }
2933
2934 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002935 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01002936 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002937 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002938
Christopher Faulet3e964192018-10-24 11:39:23 +02002939 /* we reached the end of the rules, nothing to report */
2940 return rule_ret;
2941}
2942
2943/* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
2944 * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
2945 * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
2946 * is returned, the process can continue the evaluation of next rule list. If
2947 * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
2948 * is returned, it means the operation could not be processed and a server error
Christopher Fauleta53abad2020-05-13 08:12:22 +02002949 * must be returned. If *YIELD is returned, the caller must call again the
2950 * function with the same context.
Christopher Faulet3e964192018-10-24 11:39:23 +02002951 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002952static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules,
2953 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002954{
2955 struct session *sess = strm_sess(s);
2956 struct http_txn *txn = s->txn;
Christopher Faulet3e964192018-10-24 11:39:23 +02002957 struct act_rule *rule;
Christopher Faulet3e964192018-10-24 11:39:23 +02002958 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002959 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002960
Christopher Faulet3e964192018-10-24 11:39:23 +02002961 /* If "the current_rule_list" match the executed rule list, we are in
2962 * resume condition. If a resume is needed it is always in the action
2963 * and never in the ACL or converters. In this case, we initialise the
2964 * current rule, and go to the action execution point.
2965 */
2966 if (s->current_rule) {
2967 rule = s->current_rule;
2968 s->current_rule = NULL;
2969 if (s->current_rule_list == rules)
2970 goto resume_execution;
2971 }
2972 s->current_rule_list = rules;
2973
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002974 /* start the ruleset evaluation in strict mode */
2975 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002976
Christopher Faulet3e964192018-10-24 11:39:23 +02002977 list_for_each_entry(rule, rules, list) {
2978 /* check optional condition */
2979 if (rule->cond) {
2980 int ret;
2981
2982 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
2983 ret = acl_pass(ret);
2984
2985 if (rule->cond->pol == ACL_COND_UNLESS)
2986 ret = !ret;
2987
2988 if (!ret) /* condition not matched */
2989 continue;
2990 }
2991
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002992 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02002993resume_execution:
Amaury Denoyelle03517732021-05-07 14:25:01 +02002994 if (rule->kw->flags & KWF_EXPERIMENTAL)
2995 mark_tainted(TAINTED_ACTION_EXP_EXECUTED);
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002996
2997 /* Always call the action function if defined */
2998 if (rule->action_ptr) {
2999 if ((s->req.flags & CF_READ_ERROR) ||
3000 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
3001 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003002 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003003
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003004 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003005 case ACT_RET_CONT:
3006 break;
3007 case ACT_RET_STOP:
3008 rule_ret = HTTP_RULE_RES_STOP;
3009 goto end;
3010 case ACT_RET_YIELD:
3011 s->current_rule = rule;
3012 rule_ret = HTTP_RULE_RES_YIELD;
3013 goto end;
3014 case ACT_RET_ERR:
3015 rule_ret = HTTP_RULE_RES_ERROR;
3016 goto end;
3017 case ACT_RET_DONE:
3018 rule_ret = HTTP_RULE_RES_DONE;
3019 goto end;
3020 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01003021 if (txn->status == -1)
3022 txn->status = 502;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003023 rule_ret = HTTP_RULE_RES_DENY;
3024 goto end;
3025 case ACT_RET_ABRT:
3026 rule_ret = HTTP_RULE_RES_ABRT;
3027 goto end;
3028 case ACT_RET_INV:
3029 rule_ret = HTTP_RULE_RES_BADREQ;
3030 goto end;
3031 }
3032 continue; /* eval the next rule */
3033 }
3034
3035 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02003036 switch (rule->action) {
3037 case ACT_ACTION_ALLOW:
3038 rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
3039 goto end;
3040
3041 case ACT_ACTION_DENY:
Christopher Faulet5cb513a2020-05-13 17:56:56 +02003042 txn->status = rule->arg.http_reply->status;
3043 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003044 rule_ret = HTTP_RULE_RES_DENY;
Christopher Faulet3e964192018-10-24 11:39:23 +02003045 goto end;
3046
3047 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01003048 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003049 break;
3050
3051 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01003052 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003053 break;
3054
3055 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01003056 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003057 break;
3058
3059 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01003060 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003061 break;
3062
Christopher Faulet3e964192018-10-24 11:39:23 +02003063 case ACT_HTTP_REDIR:
Christopher Faulet49c2a702020-03-06 15:44:37 +01003064 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003065 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003066 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02003067 goto end;
3068
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003069 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003070 default:
3071 break;
3072 }
3073 }
3074
3075 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003076 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01003077 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003078 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01003079
Christopher Faulet3e964192018-10-24 11:39:23 +02003080 /* we reached the end of the rules, nothing to report */
3081 return rule_ret;
3082}
3083
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003084/* Executes backend and frontend http-after-response rules for the stream <s>,
3085 * in that order. it return 1 on success and 0 on error. It is the caller
3086 * responsibility to catch error or ignore it. If it catches it, this function
3087 * may be called a second time, for the internal error.
3088 */
3089int http_eval_after_res_rules(struct stream *s)
3090{
3091 struct session *sess = s->sess;
3092 enum rule_result ret = HTTP_RULE_RES_CONT;
3093
Christopher Faulet507479b2020-05-15 12:29:46 +02003094 /* Eval after-response ruleset only if the reply is not const */
3095 if (s->txn->flags & TX_CONST_REPLY)
3096 goto end;
3097
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003098 /* prune the request variables if not already done and swap to the response variables. */
3099 if (s->vars_reqres.scope != SCOPE_RES) {
3100 if (!LIST_ISEMPTY(&s->vars_reqres.head))
3101 vars_prune(&s->vars_reqres, s->sess, s);
3102 vars_init(&s->vars_reqres, SCOPE_RES);
3103 }
3104
3105 ret = http_res_get_intercept_rule(s->be, &s->be->http_after_res_rules, s);
Christopher Fauletf5db0fc2021-11-09 17:48:39 +01003106 if ((ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) && sess->fe != s->be)
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003107 ret = http_res_get_intercept_rule(sess->fe, &sess->fe->http_after_res_rules, s);
3108
Christopher Faulet507479b2020-05-15 12:29:46 +02003109 end:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003110 /* All other codes than CONTINUE, STOP or DONE are forbidden */
3111 return (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP || ret == HTTP_RULE_RES_DONE);
3112}
3113
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003114/*
3115 * Manage client-side cookie. It can impact performance by about 2% so it is
3116 * desirable to call it only when needed. This code is quite complex because
3117 * of the multiple very crappy and ambiguous syntaxes we have to support. it
3118 * highly recommended not to touch this part without a good reason !
3119 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003120static void http_manage_client_side_cookies(struct stream *s, struct channel *req)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003121{
3122 struct session *sess = s->sess;
3123 struct http_txn *txn = s->txn;
3124 struct htx *htx;
3125 struct http_hdr_ctx ctx;
3126 char *hdr_beg, *hdr_end, *del_from;
3127 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
3128 int preserve_hdr;
3129
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003130 htx = htxbuf(&req->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003131 ctx.blk = NULL;
3132 while (http_find_header(htx, ist("Cookie"), &ctx, 1)) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003133 int is_first = 1;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003134 del_from = NULL; /* nothing to be deleted */
3135 preserve_hdr = 0; /* assume we may kill the whole header */
3136
3137 /* Now look for cookies. Conforming to RFC2109, we have to support
3138 * attributes whose name begin with a '$', and associate them with
3139 * the right cookie, if we want to delete this cookie.
3140 * So there are 3 cases for each cookie read :
3141 * 1) it's a special attribute, beginning with a '$' : ignore it.
3142 * 2) it's a server id cookie that we *MAY* want to delete : save
3143 * some pointers on it (last semi-colon, beginning of cookie...)
3144 * 3) it's an application cookie : we *MAY* have to delete a previous
3145 * "special" cookie.
3146 * At the end of loop, if a "special" cookie remains, we may have to
3147 * remove it. If no application cookie persists in the header, we
3148 * *MUST* delete it.
3149 *
3150 * Note: RFC2965 is unclear about the processing of spaces around
3151 * the equal sign in the ATTR=VALUE form. A careful inspection of
3152 * the RFC explicitly allows spaces before it, and not within the
3153 * tokens (attrs or values). An inspection of RFC2109 allows that
3154 * too but section 10.1.3 lets one think that spaces may be allowed
3155 * after the equal sign too, resulting in some (rare) buggy
3156 * implementations trying to do that. So let's do what servers do.
3157 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
3158 * allowed quoted strings in values, with any possible character
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003159 * after a backslash, including control chars and delimiters, which
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003160 * causes parsing to become ambiguous. Browsers also allow spaces
3161 * within values even without quotes.
3162 *
3163 * We have to keep multiple pointers in order to support cookie
3164 * removal at the beginning, middle or end of header without
3165 * corrupting the header. All of these headers are valid :
3166 *
3167 * hdr_beg hdr_end
3168 * | |
3169 * v |
3170 * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 |
3171 * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v
3172 * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3
3173 * | | | | | | |
3174 * | | | | | | |
3175 * | | | | | | +--> next
3176 * | | | | | +----> val_end
3177 * | | | | +-----------> val_beg
3178 * | | | +--------------> equal
3179 * | | +----------------> att_end
3180 * | +---------------------> att_beg
3181 * +--------------------------> prev
3182 *
3183 */
3184 hdr_beg = ctx.value.ptr;
3185 hdr_end = hdr_beg + ctx.value.len;
3186 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3187 /* Iterate through all cookies on this line */
3188
3189 /* find att_beg */
3190 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003191 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003192 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003193 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003194
3195 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3196 att_beg++;
3197
3198 /* find att_end : this is the first character after the last non
3199 * space before the equal. It may be equal to hdr_end.
3200 */
3201 equal = att_end = att_beg;
3202 while (equal < hdr_end) {
3203 if (*equal == '=' || *equal == ',' || *equal == ';')
3204 break;
3205 if (HTTP_IS_SPHT(*equal++))
3206 continue;
3207 att_end = equal;
3208 }
3209
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003210 /* here, <equal> points to '=', a delimiter or the end. <att_end>
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003211 * is between <att_beg> and <equal>, both may be identical.
3212 */
3213 /* look for end of cookie if there is an equal sign */
3214 if (equal < hdr_end && *equal == '=') {
3215 /* look for the beginning of the value */
3216 val_beg = equal + 1;
3217 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3218 val_beg++;
3219
3220 /* find the end of the value, respecting quotes */
3221 next = http_find_cookie_value_end(val_beg, hdr_end);
3222
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003223 /* make val_end point to the first white space or delimiter after the value */
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003224 val_end = next;
3225 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3226 val_end--;
3227 }
3228 else
3229 val_beg = val_end = next = equal;
3230
3231 /* We have nothing to do with attributes beginning with
3232 * '$'. However, they will automatically be removed if a
3233 * header before them is removed, since they're supposed
3234 * to be linked together.
3235 */
3236 if (*att_beg == '$')
3237 continue;
3238
3239 /* Ignore cookies with no equal sign */
3240 if (equal == next) {
3241 /* This is not our cookie, so we must preserve it. But if we already
3242 * scheduled another cookie for removal, we cannot remove the
3243 * complete header, but we can remove the previous block itself.
3244 */
3245 preserve_hdr = 1;
3246 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003247 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003248 val_end += delta;
3249 next += delta;
3250 hdr_end += delta;
3251 prev = del_from;
3252 del_from = NULL;
3253 }
3254 continue;
3255 }
3256
3257 /* if there are spaces around the equal sign, we need to
3258 * strip them otherwise we'll get trouble for cookie captures,
3259 * or even for rewrites. Since this happens extremely rarely,
3260 * it does not hurt performance.
3261 */
3262 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3263 int stripped_before = 0;
3264 int stripped_after = 0;
3265
3266 if (att_end != equal) {
3267 memmove(att_end, equal, hdr_end - equal);
3268 stripped_before = (att_end - equal);
3269 equal += stripped_before;
3270 val_beg += stripped_before;
3271 }
3272
3273 if (val_beg > equal + 1) {
3274 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3275 stripped_after = (equal + 1) - val_beg;
3276 val_beg += stripped_after;
3277 stripped_before += stripped_after;
3278 }
3279
3280 val_end += stripped_before;
3281 next += stripped_before;
3282 hdr_end += stripped_before;
3283 }
3284 /* now everything is as on the diagram above */
3285
3286 /* First, let's see if we want to capture this cookie. We check
3287 * that we don't already have a client side cookie, because we
3288 * can only capture one. Also as an optimisation, we ignore
3289 * cookies shorter than the declared name.
3290 */
3291 if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
3292 (val_end - att_beg >= sess->fe->capture_namelen) &&
3293 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3294 int log_len = val_end - att_beg;
3295
3296 if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
3297 ha_alert("HTTP logging : out of memory.\n");
3298 } else {
3299 if (log_len > sess->fe->capture_len)
3300 log_len = sess->fe->capture_len;
3301 memcpy(txn->cli_cookie, att_beg, log_len);
3302 txn->cli_cookie[log_len] = 0;
3303 }
3304 }
3305
3306 /* Persistence cookies in passive, rewrite or insert mode have the
3307 * following form :
3308 *
3309 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
3310 *
3311 * For cookies in prefix mode, the form is :
3312 *
3313 * Cookie: NAME=SRV~VALUE
3314 */
3315 if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3316 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3317 struct server *srv = s->be->srv;
3318 char *delim;
3319
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003320 /* if we're in cookie prefix mode, we'll search the delimiter so that we
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003321 * have the server ID between val_beg and delim, and the original cookie between
3322 * delim+1 and val_end. Otherwise, delim==val_end :
3323 *
3324 * hdr_beg
3325 * |
3326 * v
3327 * NAME=SRV; # in all but prefix modes
3328 * NAME=SRV~OPAQUE ; # in prefix mode
3329 * || || | |+-> next
3330 * || || | +--> val_end
3331 * || || +---------> delim
3332 * || |+------------> val_beg
3333 * || +-------------> att_end = equal
3334 * |+-----------------> att_beg
3335 * +------------------> prev
3336 *
3337 */
3338 if (s->be->ck_opts & PR_CK_PFX) {
3339 for (delim = val_beg; delim < val_end; delim++)
3340 if (*delim == COOKIE_DELIM)
3341 break;
3342 }
3343 else {
3344 char *vbar1;
3345 delim = val_end;
3346 /* Now check if the cookie contains a date field, which would
3347 * appear after a vertical bar ('|') just after the server name
3348 * and before the delimiter.
3349 */
3350 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
3351 if (vbar1) {
3352 /* OK, so left of the bar is the server's cookie and
3353 * right is the last seen date. It is a base64 encoded
3354 * 30-bit value representing the UNIX date since the
3355 * epoch in 4-second quantities.
3356 */
3357 int val;
3358 delim = vbar1++;
3359 if (val_end - vbar1 >= 5) {
3360 val = b64tos30(vbar1);
3361 if (val > 0)
3362 txn->cookie_last_date = val << 2;
3363 }
3364 /* look for a second vertical bar */
3365 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
3366 if (vbar1 && (val_end - vbar1 > 5)) {
3367 val = b64tos30(vbar1 + 1);
3368 if (val > 0)
3369 txn->cookie_first_date = val << 2;
3370 }
3371 }
3372 }
3373
3374 /* if the cookie has an expiration date and the proxy wants to check
3375 * it, then we do that now. We first check if the cookie is too old,
3376 * then only if it has expired. We detect strict overflow because the
3377 * time resolution here is not great (4 seconds). Cookies with dates
3378 * in the future are ignored if their offset is beyond one day. This
3379 * allows an admin to fix timezone issues without expiring everyone
3380 * and at the same time avoids keeping unwanted side effects for too
3381 * long.
3382 */
3383 if (txn->cookie_first_date && s->be->cookie_maxlife &&
3384 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
3385 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
3386 txn->flags &= ~TX_CK_MASK;
3387 txn->flags |= TX_CK_OLD;
3388 delim = val_beg; // let's pretend we have not found the cookie
3389 txn->cookie_first_date = 0;
3390 txn->cookie_last_date = 0;
3391 }
3392 else if (txn->cookie_last_date && s->be->cookie_maxidle &&
3393 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
3394 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
3395 txn->flags &= ~TX_CK_MASK;
3396 txn->flags |= TX_CK_EXPIRED;
3397 delim = val_beg; // let's pretend we have not found the cookie
3398 txn->cookie_first_date = 0;
3399 txn->cookie_last_date = 0;
3400 }
3401
3402 /* Here, we'll look for the first running server which supports the cookie.
3403 * This allows to share a same cookie between several servers, for example
3404 * to dedicate backup servers to specific servers only.
3405 * However, to prevent clients from sticking to cookie-less backup server
3406 * when they have incidentely learned an empty cookie, we simply ignore
3407 * empty cookies and mark them as invalid.
3408 * The same behaviour is applied when persistence must be ignored.
3409 */
3410 if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3411 srv = NULL;
3412
3413 while (srv) {
3414 if (srv->cookie && (srv->cklen == delim - val_beg) &&
3415 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
3416 if ((srv->cur_state != SRV_ST_STOPPED) ||
3417 (s->be->options & PR_O_PERSIST) ||
3418 (s->flags & SF_FORCE_PRST)) {
3419 /* we found the server and we can use it */
3420 txn->flags &= ~TX_CK_MASK;
3421 txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
3422 s->flags |= SF_DIRECT | SF_ASSIGNED;
3423 s->target = &srv->obj_type;
3424 break;
3425 } else {
3426 /* we found a server, but it's down,
3427 * mark it as such and go on in case
3428 * another one is available.
3429 */
3430 txn->flags &= ~TX_CK_MASK;
3431 txn->flags |= TX_CK_DOWN;
3432 }
3433 }
3434 srv = srv->next;
3435 }
3436
3437 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
3438 /* no server matched this cookie or we deliberately skipped it */
3439 txn->flags &= ~TX_CK_MASK;
3440 if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3441 txn->flags |= TX_CK_UNUSED;
3442 else
3443 txn->flags |= TX_CK_INVALID;
3444 }
3445
3446 /* depending on the cookie mode, we may have to either :
3447 * - delete the complete cookie if we're in insert+indirect mode, so that
3448 * the server never sees it ;
3449 * - remove the server id from the cookie value, and tag the cookie as an
Joseph Herlante9d5c722018-11-25 11:00:25 -08003450 * application cookie so that it does not get accidentally removed later,
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003451 * if we're in cookie prefix mode
3452 */
3453 if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
3454 int delta; /* negative */
3455
3456 memmove(val_beg, delim + 1, hdr_end - (delim + 1));
3457 delta = val_beg - (delim + 1);
3458 val_end += delta;
3459 next += delta;
3460 hdr_end += delta;
3461 del_from = NULL;
3462 preserve_hdr = 1; /* we want to keep this cookie */
3463 }
3464 else if (del_from == NULL &&
3465 (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
3466 del_from = prev;
3467 }
3468 }
3469 else {
3470 /* This is not our cookie, so we must preserve it. But if we already
3471 * scheduled another cookie for removal, we cannot remove the
3472 * complete header, but we can remove the previous block itself.
3473 */
3474 preserve_hdr = 1;
3475
3476 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003477 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003478 if (att_beg >= del_from)
3479 att_beg += delta;
3480 if (att_end >= del_from)
3481 att_end += delta;
3482 val_beg += delta;
3483 val_end += delta;
3484 next += delta;
3485 hdr_end += delta;
3486 prev = del_from;
3487 del_from = NULL;
3488 }
3489 }
3490
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003491 } /* for each cookie */
3492
3493
3494 /* There are no more cookies on this line.
3495 * We may still have one (or several) marked for deletion at the
3496 * end of the line. We must do this now in two ways :
3497 * - if some cookies must be preserved, we only delete from the
3498 * mark to the end of line ;
3499 * - if nothing needs to be preserved, simply delete the whole header
3500 */
3501 if (del_from) {
3502 hdr_end = (preserve_hdr ? del_from : hdr_beg);
3503 }
3504 if ((hdr_end - hdr_beg) != ctx.value.len) {
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003505 if (hdr_beg != hdr_end)
3506 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003507 else
3508 http_remove_header(htx, &ctx);
3509 }
3510 } /* for each "Cookie header */
3511}
3512
3513/*
3514 * Manage server-side cookies. It can impact performance by about 2% so it is
3515 * desirable to call it only when needed. This function is also used when we
3516 * just need to know if there is a cookie (eg: for check-cache).
3517 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003518static void http_manage_server_side_cookies(struct stream *s, struct channel *res)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003519{
3520 struct session *sess = s->sess;
3521 struct http_txn *txn = s->txn;
3522 struct htx *htx;
3523 struct http_hdr_ctx ctx;
3524 struct server *srv;
3525 char *hdr_beg, *hdr_end;
3526 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau6f7a02a2019-04-15 21:49:49 +02003527 int is_cookie2 = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003528
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003529 htx = htxbuf(&res->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003530
3531 ctx.blk = NULL;
3532 while (1) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003533 int is_first = 1;
3534
Andrew McDermott86032c32022-02-11 18:26:49 +00003535 if (is_cookie2 || !http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) {
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003536 if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1))
3537 break;
3538 is_cookie2 = 1;
3539 }
3540
3541 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
3542 * <prev> points to the colon.
3543 */
3544 txn->flags |= TX_SCK_PRESENT;
3545
3546 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
3547 * check-cache is enabled) and we are not interested in checking
3548 * them. Warning, the cookie capture is declared in the frontend.
3549 */
3550 if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
3551 break;
3552
3553 /* OK so now we know we have to process this response cookie.
3554 * The format of the Set-Cookie header is slightly different
3555 * from the format of the Cookie header in that it does not
3556 * support the comma as a cookie delimiter (thus the header
3557 * cannot be folded) because the Expires attribute described in
3558 * the original Netscape's spec may contain an unquoted date
3559 * with a comma inside. We have to live with this because
3560 * many browsers don't support Max-Age and some browsers don't
3561 * support quoted strings. However the Set-Cookie2 header is
3562 * clean.
3563 *
3564 * We have to keep multiple pointers in order to support cookie
3565 * removal at the beginning, middle or end of header without
3566 * corrupting the header (in case of set-cookie2). A special
3567 * pointer, <scav> points to the beginning of the set-cookie-av
3568 * fields after the first semi-colon. The <next> pointer points
3569 * either to the end of line (set-cookie) or next unquoted comma
3570 * (set-cookie2). All of these headers are valid :
3571 *
3572 * hdr_beg hdr_end
3573 * | |
3574 * v |
3575 * NAME1 = VALUE 1 ; Secure; Path="/" |
3576 * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v
3577 * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT
3578 * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard
3579 * | | | | | | | |
3580 * | | | | | | | +-> next
3581 * | | | | | | +------------> scav
3582 * | | | | | +--------------> val_end
3583 * | | | | +--------------------> val_beg
3584 * | | | +----------------------> equal
3585 * | | +------------------------> att_end
3586 * | +----------------------------> att_beg
3587 * +------------------------------> prev
3588 * -------------------------------> hdr_beg
3589 */
3590 hdr_beg = ctx.value.ptr;
3591 hdr_end = hdr_beg + ctx.value.len;
3592 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3593
3594 /* Iterate through all cookies on this line */
3595
3596 /* find att_beg */
3597 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003598 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003599 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003600 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003601
3602 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3603 att_beg++;
3604
3605 /* find att_end : this is the first character after the last non
3606 * space before the equal. It may be equal to hdr_end.
3607 */
3608 equal = att_end = att_beg;
3609
3610 while (equal < hdr_end) {
3611 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
3612 break;
3613 if (HTTP_IS_SPHT(*equal++))
3614 continue;
3615 att_end = equal;
3616 }
3617
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003618 /* here, <equal> points to '=', a delimiter or the end. <att_end>
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003619 * is between <att_beg> and <equal>, both may be identical.
3620 */
3621
3622 /* look for end of cookie if there is an equal sign */
3623 if (equal < hdr_end && *equal == '=') {
3624 /* look for the beginning of the value */
3625 val_beg = equal + 1;
3626 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3627 val_beg++;
3628
3629 /* find the end of the value, respecting quotes */
3630 next = http_find_cookie_value_end(val_beg, hdr_end);
3631
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003632 /* make val_end point to the first white space or delimiter after the value */
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003633 val_end = next;
3634 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3635 val_end--;
3636 }
3637 else {
3638 /* <equal> points to next comma, semi-colon or EOL */
3639 val_beg = val_end = next = equal;
3640 }
3641
3642 if (next < hdr_end) {
3643 /* Set-Cookie2 supports multiple cookies, and <next> points to
3644 * a colon or semi-colon before the end. So skip all attr-value
3645 * pairs and look for the next comma. For Set-Cookie, since
3646 * commas are permitted in values, skip to the end.
3647 */
3648 if (is_cookie2)
3649 next = http_find_hdr_value_end(next, hdr_end);
3650 else
3651 next = hdr_end;
3652 }
3653
3654 /* Now everything is as on the diagram above */
3655
3656 /* Ignore cookies with no equal sign */
3657 if (equal == val_end)
3658 continue;
3659
3660 /* If there are spaces around the equal sign, we need to
3661 * strip them otherwise we'll get trouble for cookie captures,
3662 * or even for rewrites. Since this happens extremely rarely,
3663 * it does not hurt performance.
3664 */
3665 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3666 int stripped_before = 0;
3667 int stripped_after = 0;
3668
3669 if (att_end != equal) {
3670 memmove(att_end, equal, hdr_end - equal);
3671 stripped_before = (att_end - equal);
3672 equal += stripped_before;
3673 val_beg += stripped_before;
3674 }
3675
3676 if (val_beg > equal + 1) {
3677 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3678 stripped_after = (equal + 1) - val_beg;
3679 val_beg += stripped_after;
3680 stripped_before += stripped_after;
3681 }
3682
3683 val_end += stripped_before;
3684 next += stripped_before;
3685 hdr_end += stripped_before;
3686
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003687 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003688 ctx.value.len = hdr_end - hdr_beg;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003689 }
3690
3691 /* First, let's see if we want to capture this cookie. We check
3692 * that we don't already have a server side cookie, because we
3693 * can only capture one. Also as an optimisation, we ignore
3694 * cookies shorter than the declared name.
3695 */
3696 if (sess->fe->capture_name != NULL &&
3697 txn->srv_cookie == NULL &&
3698 (val_end - att_beg >= sess->fe->capture_namelen) &&
3699 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3700 int log_len = val_end - att_beg;
3701 if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
3702 ha_alert("HTTP logging : out of memory.\n");
3703 }
3704 else {
3705 if (log_len > sess->fe->capture_len)
3706 log_len = sess->fe->capture_len;
3707 memcpy(txn->srv_cookie, att_beg, log_len);
3708 txn->srv_cookie[log_len] = 0;
3709 }
3710 }
3711
3712 srv = objt_server(s->target);
3713 /* now check if we need to process it for persistence */
3714 if (!(s->flags & SF_IGNORE_PRST) &&
3715 (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3716 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3717 /* assume passive cookie by default */
3718 txn->flags &= ~TX_SCK_MASK;
3719 txn->flags |= TX_SCK_FOUND;
3720
3721 /* If the cookie is in insert mode on a known server, we'll delete
3722 * this occurrence because we'll insert another one later.
3723 * We'll delete it too if the "indirect" option is set and we're in
3724 * a direct access.
3725 */
3726 if (s->be->ck_opts & PR_CK_PSV) {
3727 /* The "preserve" flag was set, we don't want to touch the
3728 * server's cookie.
3729 */
3730 }
3731 else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
3732 ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
3733 /* this cookie must be deleted */
3734 if (prev == hdr_beg && next == hdr_end) {
3735 /* whole header */
3736 http_remove_header(htx, &ctx);
3737 /* note: while both invalid now, <next> and <hdr_end>
3738 * are still equal, so the for() will stop as expected.
3739 */
3740 } else {
3741 /* just remove the value */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003742 int delta = http_del_hdr_value(hdr_beg, hdr_end, &prev, next);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003743 next = prev;
3744 hdr_end += delta;
3745 }
3746 txn->flags &= ~TX_SCK_MASK;
3747 txn->flags |= TX_SCK_DELETED;
3748 /* and go on with next cookie */
3749 }
3750 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
3751 /* replace bytes val_beg->val_end with the cookie name associated
3752 * with this server since we know it.
3753 */
3754 int sliding, delta;
3755
3756 ctx.value = ist2(val_beg, val_end - val_beg);
3757 ctx.lws_before = ctx.lws_after = 0;
3758 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen));
3759 delta = srv->cklen - (val_end - val_beg);
3760 sliding = (ctx.value.ptr - val_beg);
3761 hdr_beg += sliding;
3762 val_beg += sliding;
3763 next += sliding + delta;
3764 hdr_end += sliding + delta;
3765
3766 txn->flags &= ~TX_SCK_MASK;
3767 txn->flags |= TX_SCK_REPLACED;
3768 }
3769 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
3770 /* insert the cookie name associated with this server
3771 * before existing cookie, and insert a delimiter between them..
3772 */
3773 int sliding, delta;
3774 ctx.value = ist2(val_beg, 0);
3775 ctx.lws_before = ctx.lws_after = 0;
3776 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1));
3777 delta = srv->cklen + 1;
3778 sliding = (ctx.value.ptr - val_beg);
3779 hdr_beg += sliding;
3780 val_beg += sliding;
3781 next += sliding + delta;
3782 hdr_end += sliding + delta;
3783
3784 val_beg[srv->cklen] = COOKIE_DELIM;
3785 txn->flags &= ~TX_SCK_MASK;
3786 txn->flags |= TX_SCK_REPLACED;
3787 }
3788 }
3789 /* that's done for this cookie, check the next one on the same
3790 * line when next != hdr_end (only if is_cookie2).
3791 */
3792 }
3793 }
3794}
3795
Christopher Faulet25a02f62018-10-24 12:00:25 +02003796/*
3797 * Parses the Cache-Control and Pragma request header fields to determine if
3798 * the request may be served from the cache and/or if it is cacheable. Updates
3799 * s->txn->flags.
3800 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003801void http_check_request_for_cacheability(struct stream *s, struct channel *req)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003802{
3803 struct http_txn *txn = s->txn;
3804 struct htx *htx;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003805 struct http_hdr_ctx ctx = { .blk = NULL };
3806 int pragma_found, cc_found;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003807
3808 if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
3809 return; /* nothing more to do here */
3810
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003811 htx = htxbuf(&req->buf);
Christopher Faulet25a02f62018-10-24 12:00:25 +02003812 pragma_found = cc_found = 0;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003813
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003814 /* Check "pragma" header for HTTP/1.0 compatibility. */
3815 if (http_find_header(htx, ist("pragma"), &ctx, 1)) {
3816 if (isteqi(ctx.value, ist("no-cache"))) {
3817 pragma_found = 1;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003818 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003819 }
Christopher Faulet25a02f62018-10-24 12:00:25 +02003820
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003821 ctx.blk = NULL;
3822 /* Don't use the cache and don't try to store if we found the
3823 * Authorization header */
3824 if (http_find_header(htx, ist("authorization"), &ctx, 1)) {
3825 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3826 txn->flags |= TX_CACHE_IGNORE;
3827 }
Christopher Faulet25a02f62018-10-24 12:00:25 +02003828
Christopher Faulet25a02f62018-10-24 12:00:25 +02003829
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003830 /* Look for "cache-control" header and iterate over all the values
3831 * until we find one that specifies that caching is possible or not. */
3832 ctx.blk = NULL;
3833 while (http_find_header(htx, ist("cache-control"), &ctx, 0)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003834 cc_found = 1;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003835 /* We don't check the values after max-age, max-stale nor min-fresh,
3836 * we simply don't use the cache when they're specified. */
3837 if (istmatchi(ctx.value, ist("max-age")) ||
3838 istmatchi(ctx.value, ist("no-cache")) ||
3839 istmatchi(ctx.value, ist("max-stale")) ||
3840 istmatchi(ctx.value, ist("min-fresh"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003841 txn->flags |= TX_CACHE_IGNORE;
3842 continue;
3843 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003844 if (istmatchi(ctx.value, ist("no-store"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003845 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3846 continue;
3847 }
3848 }
3849
3850 /* RFC7234#5.4:
3851 * When the Cache-Control header field is also present and
3852 * understood in a request, Pragma is ignored.
3853 * When the Cache-Control header field is not present in a
3854 * request, caches MUST consider the no-cache request
3855 * pragma-directive as having the same effect as if
3856 * "Cache-Control: no-cache" were present.
3857 */
3858 if (!cc_found && pragma_found)
3859 txn->flags |= TX_CACHE_IGNORE;
3860}
3861
3862/*
3863 * Check if response is cacheable or not. Updates s->txn->flags.
3864 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003865void http_check_response_for_cacheability(struct stream *s, struct channel *res)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003866{
3867 struct http_txn *txn = s->txn;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003868 struct http_hdr_ctx ctx = { .blk = NULL };
Christopher Faulet25a02f62018-10-24 12:00:25 +02003869 struct htx *htx;
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003870 int has_freshness_info = 0;
3871 int has_validator = 0;
Remi Tricot-Le Bretondd270e02023-07-04 17:13:28 +02003872 int has_null_maxage = 0;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003873
3874 if (txn->status < 200) {
3875 /* do not try to cache interim responses! */
3876 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3877 return;
3878 }
3879
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003880 htx = htxbuf(&res->buf);
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003881 /* Check "pragma" header for HTTP/1.0 compatibility. */
3882 if (http_find_header(htx, ist("pragma"), &ctx, 1)) {
3883 if (isteqi(ctx.value, ist("no-cache"))) {
3884 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3885 return;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003886 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003887 }
Christopher Faulet25a02f62018-10-24 12:00:25 +02003888
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003889 /* Look for "cache-control" header and iterate over all the values
3890 * until we find one that specifies that caching is possible or not. */
3891 ctx.blk = NULL;
3892 while (http_find_header(htx, ist("cache-control"), &ctx, 0)) {
3893 if (isteqi(ctx.value, ist("public"))) {
3894 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003895 continue;
3896 }
Remi Tricot-Le Bretondd270e02023-07-04 17:13:28 +02003897 /* This max-age might be overridden by a s-maxage directive, do
3898 * not unset the TX_CACHEABLE yet. */
3899 if (isteqi(ctx.value, ist("max-age=0"))) {
3900 has_null_maxage = 1;
3901 continue;
3902 }
3903
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003904 if (isteqi(ctx.value, ist("private")) ||
3905 isteqi(ctx.value, ist("no-cache")) ||
3906 isteqi(ctx.value, ist("no-store")) ||
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003907 isteqi(ctx.value, ist("s-maxage=0"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003908 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003909 continue;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003910 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003911 /* We might have a no-cache="set-cookie" form. */
3912 if (istmatchi(ctx.value, ist("no-cache=\"set-cookie"))) {
3913 txn->flags &= ~TX_CACHE_COOK;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003914 continue;
3915 }
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003916
Remi Tricot-Le Bretondd270e02023-07-04 17:13:28 +02003917 if (istmatchi(ctx.value, ist("s-maxage"))) {
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003918 has_freshness_info = 1;
Remi Tricot-Le Bretondd270e02023-07-04 17:13:28 +02003919 has_null_maxage = 0; /* The null max-age is overridden, ignore it */
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003920 continue;
3921 }
Remi Tricot-Le Bretondd270e02023-07-04 17:13:28 +02003922 if (istmatchi(ctx.value, ist("max-age"))) {
3923 has_freshness_info = 1;
3924 continue;
3925 }
3926 }
3927
3928 /* We had a 'max-age=0' directive but no extra s-maxage, do not cache
3929 * the response. */
3930 if (has_null_maxage) {
3931 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003932 }
3933
3934 /* If no freshness information could be found in Cache-Control values,
3935 * look for an Expires header. */
3936 if (!has_freshness_info) {
3937 ctx.blk = NULL;
3938 has_freshness_info = http_find_header(htx, ist("expires"), &ctx, 0);
Christopher Faulet25a02f62018-10-24 12:00:25 +02003939 }
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003940
3941 /* If no freshness information could be found in Cache-Control or Expires
3942 * values, look for an explicit validator. */
3943 if (!has_freshness_info) {
3944 ctx.blk = NULL;
3945 has_validator = 1;
3946 if (!http_find_header(htx, ist("etag"), &ctx, 0)) {
3947 ctx.blk = NULL;
3948 if (!http_find_header(htx, ist("last-modified"), &ctx, 0))
3949 has_validator = 0;
3950 }
3951 }
3952
3953 /* We won't store an entry that has neither a cache validator nor an
3954 * explicit expiration time, as suggested in RFC 7234#3. */
3955 if (!has_freshness_info && !has_validator)
Remi Tricot-Le Bretona59ce4f2023-02-21 11:47:17 +01003956 txn->flags &= ~TX_CACHEABLE;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003957}
3958
Christopher Faulet377c5a52018-10-24 21:21:30 +02003959/*
3960 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
3961 * for the current backend.
3962 *
3963 * It is assumed that the request is either a HEAD, GET, or POST and that the
3964 * uri_auth field is valid.
3965 *
3966 * Returns 1 if stats should be provided, otherwise 0.
3967 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003968static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend)
Christopher Faulet377c5a52018-10-24 21:21:30 +02003969{
3970 struct uri_auth *uri_auth = backend->uri_auth;
3971 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003972 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02003973 struct ist uri;
Christopher Faulet377c5a52018-10-24 21:21:30 +02003974
3975 if (!uri_auth)
3976 return 0;
3977
3978 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
3979 return 0;
3980
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003981 htx = htxbuf(&s->req.buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02003982 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003983 uri = htx_sl_req_uri(sl);
Willy Tarreau1eb3b482019-10-31 15:50:28 +01003984 if (*uri_auth->uri_prefix == '/')
3985 uri = http_get_path(uri);
Christopher Faulet377c5a52018-10-24 21:21:30 +02003986
3987 /* check URI size */
3988 if (uri_auth->uri_len > uri.len)
3989 return 0;
3990
3991 if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
3992 return 0;
3993
3994 return 1;
3995}
3996
3997/* This function prepares an applet to handle the stats. It can deal with the
3998 * "100-continue" expectation, check that admin rules are met for POST requests,
3999 * and program a response message if something was unexpected. It cannot fail
4000 * and always relies on the stats applet to complete the job. It does not touch
4001 * analysers nor counters, which are left to the caller. It does not touch
4002 * s->target which is supposed to already point to the stats applet. The caller
4003 * is expected to have already assigned an appctx to the stream.
4004 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004005static int http_handle_stats(struct stream *s, struct channel *req)
Christopher Faulet377c5a52018-10-24 21:21:30 +02004006{
4007 struct stats_admin_rule *stats_admin_rule;
4008 struct stream_interface *si = &s->si[1];
4009 struct session *sess = s->sess;
4010 struct http_txn *txn = s->txn;
4011 struct http_msg *msg = &txn->req;
4012 struct uri_auth *uri_auth = s->be->uri_auth;
4013 const char *h, *lookup, *end;
4014 struct appctx *appctx;
4015 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004016 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004017
4018 appctx = si_appctx(si);
4019 memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
4020 appctx->st1 = appctx->st2 = 0;
4021 appctx->ctx.stats.st_code = STAT_STATUS_INIT;
Willy Tarreau676c29e2019-10-09 10:50:01 +02004022 appctx->ctx.stats.flags |= uri_auth->flags;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004023 appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
4024 if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD))
4025 appctx->ctx.stats.flags |= STAT_CHUNKED;
4026
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004027 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004028 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004029 lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len;
4030 end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004031
4032 for (h = lookup; h <= end - 3; h++) {
4033 if (memcmp(h, ";up", 3) == 0) {
4034 appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
4035 break;
4036 }
Amaury Denoyelle91e55ea2021-02-25 14:46:08 +01004037 }
4038
4039 for (h = lookup; h <= end - 9; h++) {
4040 if (memcmp(h, ";no-maint", 9) == 0) {
Willy Tarreau3e320362020-10-23 17:28:57 +02004041 appctx->ctx.stats.flags |= STAT_HIDE_MAINT;
4042 break;
4043 }
Christopher Faulet377c5a52018-10-24 21:21:30 +02004044 }
4045
4046 if (uri_auth->refresh) {
4047 for (h = lookup; h <= end - 10; h++) {
4048 if (memcmp(h, ";norefresh", 10) == 0) {
4049 appctx->ctx.stats.flags |= STAT_NO_REFRESH;
4050 break;
4051 }
4052 }
4053 }
4054
4055 for (h = lookup; h <= end - 4; h++) {
4056 if (memcmp(h, ";csv", 4) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004057 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004058 break;
4059 }
4060 }
4061
4062 for (h = lookup; h <= end - 6; h++) {
4063 if (memcmp(h, ";typed", 6) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004064 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004065 appctx->ctx.stats.flags |= STAT_FMT_TYPED;
4066 break;
4067 }
4068 }
4069
Christopher Faulet6338a082019-09-09 15:50:54 +02004070 for (h = lookup; h <= end - 5; h++) {
4071 if (memcmp(h, ";json", 5) == 0) {
4072 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
4073 appctx->ctx.stats.flags |= STAT_FMT_JSON;
4074 break;
4075 }
4076 }
4077
4078 for (h = lookup; h <= end - 12; h++) {
4079 if (memcmp(h, ";json-schema", 12) == 0) {
4080 appctx->ctx.stats.flags &= ~STAT_FMT_MASK;
4081 appctx->ctx.stats.flags |= STAT_JSON_SCHM;
4082 break;
4083 }
4084 }
4085
Christopher Faulet377c5a52018-10-24 21:21:30 +02004086 for (h = lookup; h <= end - 8; h++) {
4087 if (memcmp(h, ";st=", 4) == 0) {
4088 int i;
4089 h += 4;
4090 appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
4091 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
4092 if (strncmp(stat_status_codes[i], h, 4) == 0) {
4093 appctx->ctx.stats.st_code = i;
4094 break;
4095 }
4096 }
4097 break;
4098 }
4099 }
4100
4101 appctx->ctx.stats.scope_str = 0;
4102 appctx->ctx.stats.scope_len = 0;
4103 for (h = lookup; h <= end - 8; h++) {
4104 if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
4105 int itx = 0;
4106 const char *h2;
4107 char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
4108 const char *err;
4109
4110 h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
4111 h2 = h;
Christopher Fauleted7a0662019-01-14 11:07:34 +01004112 appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl);
4113 while (h < end) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004114 if (*h == ';' || *h == '&' || *h == ' ')
4115 break;
4116 itx++;
4117 h++;
4118 }
4119
4120 if (itx > STAT_SCOPE_TXT_MAXLEN)
4121 itx = STAT_SCOPE_TXT_MAXLEN;
4122 appctx->ctx.stats.scope_len = itx;
4123
4124 /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
4125 memcpy(scope_txt, h2, itx);
4126 scope_txt[itx] = '\0';
4127 err = invalid_char(scope_txt);
4128 if (err) {
4129 /* bad char in search text => clear scope */
4130 appctx->ctx.stats.scope_str = 0;
4131 appctx->ctx.stats.scope_len = 0;
4132 }
4133 break;
4134 }
4135 }
4136
4137 /* now check whether we have some admin rules for this request */
4138 list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
4139 int ret = 1;
4140
4141 if (stats_admin_rule->cond) {
4142 ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
4143 ret = acl_pass(ret);
4144 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
4145 ret = !ret;
4146 }
4147
4148 if (ret) {
4149 /* no rule, or the rule matches */
4150 appctx->ctx.stats.flags |= STAT_ADMIN;
4151 break;
4152 }
4153 }
4154
Christopher Faulet5d45e382019-02-27 15:15:23 +01004155 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
4156 appctx->st0 = STAT_HTTP_HEAD;
4157 else if (txn->meth == HTTP_METH_POST) {
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004158 if (appctx->ctx.stats.flags & STAT_ADMIN) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004159 appctx->st0 = STAT_HTTP_POST;
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004160 if (msg->msg_state < HTTP_MSG_DATA)
4161 req->analysers |= AN_REQ_HTTP_BODY;
4162 }
Christopher Faulet377c5a52018-10-24 21:21:30 +02004163 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004164 /* POST without admin level */
Christopher Faulet377c5a52018-10-24 21:21:30 +02004165 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4166 appctx->ctx.stats.st_code = STAT_STATUS_DENY;
4167 appctx->st0 = STAT_HTTP_LAST;
4168 }
4169 }
4170 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004171 /* Unsupported method */
4172 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4173 appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
4174 appctx->st0 = STAT_HTTP_LAST;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004175 }
4176
4177 s->task->nice = -32; /* small boost for HTTP statistics */
4178 return 1;
4179}
4180
Christopher Faulet021a8e42021-03-29 10:46:38 +02004181/* This function waits for the message payload at most <time> milliseconds (may
4182 * be set to TICK_ETERNITY). It stops to wait if at least <bytes> bytes of the
4183 * payload are received (0 means no limit). It returns HTTP_RULE_* depending on
4184 * the result:
4185 *
4186 * - HTTP_RULE_RES_CONT when conditions are met to stop waiting
4187 * - HTTP_RULE_RES_YIELD to wait for more data
Ilya Shipitsinb2be9a12021-04-24 13:25:42 +05004188 * - HTTP_RULE_RES_ABRT when a timeout occurred.
Christopher Faulet021a8e42021-03-29 10:46:38 +02004189 * - HTTP_RULE_RES_BADREQ if a parsing error is raised by lower level
Ilya Shipitsinb2be9a12021-04-24 13:25:42 +05004190 * - HTTP_RULE_RES_ERROR if an internal error occurred
Christopher Faulet021a8e42021-03-29 10:46:38 +02004191 *
Ilya Shipitsinb2be9a12021-04-24 13:25:42 +05004192 * If a timeout occurred, this function is responsible to emit the right response
Christopher Faulet021a8e42021-03-29 10:46:38 +02004193 * to the client, depending on the channel (408 on request side, 504 on response
4194 * side). All other errors must be handled by the caller.
4195 */
4196enum rule_result http_wait_for_msg_body(struct stream *s, struct channel *chn,
4197 unsigned int time, unsigned int bytes)
4198{
4199 struct session *sess = s->sess;
4200 struct http_txn *txn = s->txn;
4201 struct http_msg *msg = ((chn->flags & CF_ISRESP) ? &txn->rsp : &txn->req);
4202 struct htx *htx;
4203 enum rule_result ret = HTTP_RULE_RES_CONT;
4204
4205 htx = htxbuf(&chn->buf);
4206
4207 if (htx->flags & HTX_FL_PARSING_ERROR) {
4208 ret = HTTP_RULE_RES_BADREQ;
4209 goto end;
4210 }
4211 if (htx->flags & HTX_FL_PROCESSING_ERROR) {
4212 ret = HTTP_RULE_RES_ERROR;
4213 goto end;
4214 }
4215
4216 /* Do nothing for bodyless and CONNECT requests */
4217 if (txn->meth == HTTP_METH_CONNECT || (msg->flags & HTTP_MSGF_BODYLESS))
4218 goto end;
4219
4220 if (!(chn->flags & CF_ISRESP) && msg->msg_state < HTTP_MSG_DATA) {
4221 if (http_handle_expect_hdr(s, htx, msg) == -1) {
4222 ret = HTTP_RULE_RES_ERROR;
4223 goto end;
4224 }
4225 }
4226
4227 msg->msg_state = HTTP_MSG_DATA;
4228
4229 /* Now we're in HTTP_MSG_DATA. We just need to know if all data have
4230 * been received or if the buffer is full.
4231 */
Christopher Faulet59df8122021-09-23 14:46:32 +02004232 if ((htx->flags & HTX_FL_EOM) ||
4233 htx_get_tail_type(htx) > HTX_BLK_DATA ||
4234 channel_htx_full(chn, htx, global.tune.maxrewrite) ||
4235 si_rx_blocked_room(chn_prod(chn)))
Christopher Faulet021a8e42021-03-29 10:46:38 +02004236 goto end;
4237
4238 if (bytes) {
4239 struct htx_blk *blk;
4240 unsigned int len = 0;
4241
4242 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
4243 if (htx_get_blk_type(blk) != HTX_BLK_DATA)
4244 continue;
4245 len += htx_get_blksz(blk);
4246 if (len >= bytes)
4247 goto end;
4248 }
4249 }
4250
4251 if ((chn->flags & CF_READ_TIMEOUT) || tick_is_expired(chn->analyse_exp, now_ms)) {
4252 if (!(chn->flags & CF_ISRESP))
4253 goto abort_req;
4254 goto abort_res;
4255 }
4256
4257 /* we get here if we need to wait for more data */
4258 if (!(chn->flags & (CF_SHUTR | CF_READ_ERROR))) {
4259 if (!tick_isset(chn->analyse_exp))
4260 chn->analyse_exp = tick_add_ifset(now_ms, time);
4261 ret = HTTP_RULE_RES_YIELD;
4262 }
4263
4264 end:
4265 return ret;
4266
4267 abort_req:
4268 txn->status = 408;
4269 if (!(s->flags & SF_ERR_MASK))
4270 s->flags |= SF_ERR_CLITO;
4271 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet1a023fa2023-01-13 10:49:31 +01004272 s->flags |= SF_FINST_R;
Willy Tarreau4781b152021-04-06 13:53:36 +02004273 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
Christopher Faulet021a8e42021-03-29 10:46:38 +02004274 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02004275 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
Christopher Faulet021a8e42021-03-29 10:46:38 +02004276 http_reply_and_close(s, txn->status, http_error_message(s));
4277 ret = HTTP_RULE_RES_ABRT;
4278 goto end;
4279
4280 abort_res:
4281 txn->status = 504;
4282 if (!(s->flags & SF_ERR_MASK))
4283 s->flags |= SF_ERR_SRVTO;
4284 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet1a023fa2023-01-13 10:49:31 +01004285 s->flags |= SF_FINST_R;
Christopher Faulet021a8e42021-03-29 10:46:38 +02004286 stream_inc_http_fail_ctr(s);
4287 http_reply_and_close(s, txn->status, http_error_message(s));
4288 ret = HTTP_RULE_RES_ABRT;
4289 goto end;
4290}
4291
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004292void http_perform_server_redirect(struct stream *s, struct stream_interface *si)
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004293{
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004294 struct channel *req = &s->req;
4295 struct channel *res = &s->res;
4296 struct server *srv;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004297 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004298 struct htx_sl *sl;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004299 struct ist path, location;
4300 unsigned int flags;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004301
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004302 /*
4303 * Create the location
4304 */
4305 chunk_reset(&trash);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004306
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004307 /* 1: add the server's prefix */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004308 /* special prefix "/" means don't change URL */
4309 srv = __objt_server(s->target);
4310 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
4311 if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len))
4312 return;
4313 }
4314
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004315 /* 2: add the request Path */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004316 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004317 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004318 path = http_get_path(htx_sl_req_uri(sl));
Tim Duesterhused526372020-03-05 17:56:33 +01004319 if (!isttest(path))
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004320 return;
4321
4322 if (!chunk_memcat(&trash, path.ptr, path.len))
4323 return;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004324 location = ist2(trash.area, trash.data);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004325
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004326 /*
4327 * Create the 302 respone
4328 */
4329 htx = htx_from_buf(&res->buf);
4330 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
4331 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4332 ist("HTTP/1.1"), ist("302"), ist("Found"));
4333 if (!sl)
4334 goto fail;
4335 sl->info.res.status = 302;
4336 s->txn->status = 302;
4337
4338 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
4339 !htx_add_header(htx, ist("Connection"), ist("close")) ||
4340 !htx_add_header(htx, ist("Content-length"), ist("0")) ||
4341 !htx_add_header(htx, ist("Location"), location))
4342 goto fail;
4343
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004344 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004345 goto fail;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004346
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004347 htx->flags |= HTX_FL_EOM;
Christopher Fauletc20afb82020-01-24 19:16:26 +01004348 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004349 if (!http_forward_proxy_resp(s, 1))
4350 goto fail;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004351
4352 /* return without error. */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004353 si_shutr(si);
4354 si_shutw(si);
4355 si->err_type = SI_ET_NONE;
4356 si->state = SI_ST_CLO;
4357
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004358 if (!(s->flags & SF_ERR_MASK))
4359 s->flags |= SF_ERR_LOCAL;
4360 if (!(s->flags & SF_FINST_MASK))
4361 s->flags |= SF_FINST_C;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004362
4363 /* FIXME: we should increase a counter of redirects per server and per backend. */
4364 srv_inc_sess_ctr(srv);
4365 srv_set_sess_last(srv);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004366 return;
4367
4368 fail:
4369 /* If an error occurred, remove the incomplete HTTP response from the
4370 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004371 channel_htx_truncate(res, htx);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004372}
4373
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05004374/* This function terminates the request because it was completely analyzed or
Christopher Fauletf2824e62018-10-01 12:12:37 +02004375 * because an error was triggered during the body forwarding.
4376 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004377static void http_end_request(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004378{
4379 struct channel *chn = &s->req;
4380 struct http_txn *txn = s->txn;
4381
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004382 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004383
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004384 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4385 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004386 channel_abort(chn);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004387 channel_htx_truncate(chn, htxbuf(&chn->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02004388 goto end;
4389 }
4390
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004391 if (unlikely(txn->req.msg_state < HTTP_MSG_DONE)) {
4392 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004393 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004394 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004395
4396 if (txn->req.msg_state == HTTP_MSG_DONE) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004397 /* No need to read anymore, the request was completely parsed.
4398 * We can shut the read side unless we want to abort_on_close,
4399 * or we have a POST request. The issue with POST requests is
4400 * that some browsers still send a CRLF after the request, and
4401 * this CRLF must be read so that it does not remain in the kernel
4402 * buffers, otherwise a close could cause an RST on some systems
4403 * (eg: Linux).
4404 */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004405 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004406 channel_dont_read(chn);
4407
4408 /* if the server closes the connection, we want to immediately react
4409 * and close the socket to save packets and syscalls.
4410 */
4411 s->si[1].flags |= SI_FL_NOHALF;
4412
4413 /* In any case we've finished parsing the request so we must
4414 * disable Nagle when sending data because 1) we're not going
4415 * to shut this side, and 2) the server is waiting for us to
4416 * send pending data.
4417 */
4418 chn->flags |= CF_NEVER_WAIT;
4419
Christopher Fauletd01ce402019-01-02 17:44:13 +01004420 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
4421 /* The server has not finished to respond, so we
4422 * don't want to move in order not to upset it.
4423 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004424 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletd01ce402019-01-02 17:44:13 +01004425 return;
4426 }
4427
Christopher Fauletf2824e62018-10-01 12:12:37 +02004428 /* When we get here, it means that both the request and the
4429 * response have finished receiving. Depending on the connection
4430 * mode, we'll have to wait for the last bytes to leave in either
4431 * direction, and sometimes for a close to be effective.
4432 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004433 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004434 /* Tunnel mode will not have any analyser so it needs to
4435 * poll for reads.
4436 */
4437 channel_auto_read(chn);
4438 txn->req.msg_state = HTTP_MSG_TUNNEL;
4439 }
4440 else {
4441 /* we're not expecting any new data to come for this
4442 * transaction, so we can close it.
Christopher Faulet9768c262018-10-22 09:34:31 +02004443 *
4444 * However, there is an exception if the response
4445 * length is undefined. In this case, we need to wait
4446 * the close from the server. The response will be
4447 * switched in TUNNEL mode until the end.
Christopher Fauletf2824e62018-10-01 12:12:37 +02004448 */
4449 if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
4450 txn->rsp.msg_state != HTTP_MSG_CLOSED)
Christopher Faulet9768c262018-10-22 09:34:31 +02004451 goto check_channel_flags;
Christopher Fauletf2824e62018-10-01 12:12:37 +02004452
4453 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4454 channel_shutr_now(chn);
4455 channel_shutw_now(chn);
4456 }
4457 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004458 goto check_channel_flags;
4459 }
4460
4461 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4462 http_msg_closing:
4463 /* nothing else to forward, just waiting for the output buffer
4464 * to be empty and for the shutw_now to take effect.
4465 */
4466 if (channel_is_empty(chn)) {
4467 txn->req.msg_state = HTTP_MSG_CLOSED;
4468 goto http_msg_closed;
4469 }
4470 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004471 txn->req.msg_state = HTTP_MSG_ERROR;
4472 goto end;
4473 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004474 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004475 return;
4476 }
4477
4478 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4479 http_msg_closed:
Christopher Fauletf2824e62018-10-01 12:12:37 +02004480 /* if we don't know whether the server will close, we need to hard close */
4481 if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
4482 s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
Christopher Fauletf2824e62018-10-01 12:12:37 +02004483 /* see above in MSG_DONE why we only do this in these states */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004484 if (!(s->be->options & PR_O_ABRT_CLOSE))
Christopher Fauletf2824e62018-10-01 12:12:37 +02004485 channel_dont_read(chn);
4486 goto end;
4487 }
4488
4489 check_channel_flags:
4490 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4491 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4492 /* if we've just closed an output, let's switch */
4493 txn->req.msg_state = HTTP_MSG_CLOSING;
4494 goto http_msg_closing;
4495 }
4496
4497 end:
4498 chn->analysers &= AN_REQ_FLT_END;
Christopher Faulet198ef8b2020-12-15 13:32:55 +01004499 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
4500 chn->flags |= CF_NEVER_WAIT;
4501 if (HAS_REQ_DATA_FILTERS(s))
Christopher Fauletf2824e62018-10-01 12:12:37 +02004502 chn->analysers |= AN_REQ_FLT_XFER_DATA;
Christopher Faulet198ef8b2020-12-15 13:32:55 +01004503 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004504 channel_auto_close(chn);
4505 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004506 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004507}
4508
4509
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05004510/* This function terminates the response because it was completely analyzed or
Christopher Fauletf2824e62018-10-01 12:12:37 +02004511 * because an error was triggered during the body forwarding.
4512 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004513static void http_end_response(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004514{
4515 struct channel *chn = &s->res;
4516 struct http_txn *txn = s->txn;
4517
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004518 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004519
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004520 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4521 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004522 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004523 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004524 goto end;
4525 }
4526
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004527 if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE)) {
4528 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004529 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004530 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004531
4532 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4533 /* In theory, we don't need to read anymore, but we must
4534 * still monitor the server connection for a possible close
4535 * while the request is being uploaded, so we don't disable
4536 * reading.
4537 */
4538 /* channel_dont_read(chn); */
4539
4540 if (txn->req.msg_state < HTTP_MSG_DONE) {
4541 /* The client seems to still be sending data, probably
4542 * because we got an error response during an upload.
4543 * We have the choice of either breaking the connection
4544 * or letting it pass through. Let's do the later.
4545 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004546 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004547 return;
4548 }
4549
4550 /* When we get here, it means that both the request and the
4551 * response have finished receiving. Depending on the connection
4552 * mode, we'll have to wait for the last bytes to leave in either
4553 * direction, and sometimes for a close to be effective.
4554 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004555 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004556 channel_auto_read(chn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004557 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4558 }
4559 else {
4560 /* we're not expecting any new data to come for this
4561 * transaction, so we can close it.
4562 */
4563 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4564 channel_shutr_now(chn);
4565 channel_shutw_now(chn);
4566 }
4567 }
4568 goto check_channel_flags;
4569 }
4570
4571 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4572 http_msg_closing:
4573 /* nothing else to forward, just waiting for the output buffer
4574 * to be empty and for the shutw_now to take effect.
4575 */
4576 if (channel_is_empty(chn)) {
4577 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4578 goto http_msg_closed;
4579 }
4580 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004581 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02004582 _HA_ATOMIC_INC(&strm_sess(s)->fe->fe_counters.cli_aborts);
4583 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01004584 if (strm_sess(s)->listener && strm_sess(s)->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02004585 _HA_ATOMIC_INC(&strm_sess(s)->listener->counters->cli_aborts);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004586 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02004587 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004588 goto end;
4589 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004590 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004591 return;
4592 }
4593
4594 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4595 http_msg_closed:
4596 /* drop any pending data */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004597 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004598 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004599 goto end;
4600 }
4601
4602 check_channel_flags:
4603 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4604 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4605 /* if we've just closed an output, let's switch */
4606 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4607 goto http_msg_closing;
4608 }
4609
4610 end:
4611 chn->analysers &= AN_RES_FLT_END;
Christopher Faulet198ef8b2020-12-15 13:32:55 +01004612 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
4613 chn->flags |= CF_NEVER_WAIT;
4614 if (HAS_RSP_DATA_FILTERS(s))
4615 chn->analysers |= AN_RES_FLT_XFER_DATA;
4616 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004617 channel_auto_close(chn);
4618 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004619 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004620}
4621
Christopher Fauletef70e252020-01-28 09:26:19 +01004622/* Forward a response generated by HAProxy (error/redirect/return). This
4623 * function forwards all pending incoming data. If <final> is set to 0, nothing
4624 * more is performed. It is used for 1xx informational messages. Otherwise, the
Christopher Faulet507479b2020-05-15 12:29:46 +02004625 * transaction is terminated and the request is emptied. On success 1 is
Christopher Faulet40e6b552020-06-25 16:04:50 +02004626 * returned. If an error occurred, 0 is returned. If it fails, this function
4627 * only exits. It is the caller responsibility to do the cleanup.
Christopher Fauletef70e252020-01-28 09:26:19 +01004628 */
4629int http_forward_proxy_resp(struct stream *s, int final)
4630{
4631 struct channel *req = &s->req;
4632 struct channel *res = &s->res;
4633 struct htx *htx = htxbuf(&res->buf);
4634 size_t data;
4635
4636 if (final) {
4637 htx->flags |= HTX_FL_PROXY_RESP;
Christopher Faulet507479b2020-05-15 12:29:46 +02004638
Christopher Fauletaab1b672020-11-18 16:44:02 +01004639 if (!htx_is_empty(htx) && !http_eval_after_res_rules(s))
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01004640 return 0;
Christopher Fauletef70e252020-01-28 09:26:19 +01004641
Christopher Fauletd6c48362020-10-19 18:01:38 +02004642 if (s->txn->meth == HTTP_METH_HEAD)
4643 htx_skip_msg_payload(htx);
4644
Christopher Fauletef70e252020-01-28 09:26:19 +01004645 channel_auto_read(req);
4646 channel_abort(req);
4647 channel_auto_close(req);
4648 channel_htx_erase(req, htxbuf(&req->buf));
4649
4650 res->wex = tick_add_ifset(now_ms, res->wto);
4651 channel_auto_read(res);
4652 channel_auto_close(res);
4653 channel_shutr_now(res);
Christopher Faulet1a9db7c2020-06-25 15:36:45 +02004654 res->flags |= CF_EOI; /* The response is terminated, add EOI */
Christopher Faulet42432f32020-11-20 17:43:16 +01004655 htxbuf(&res->buf)->flags |= HTX_FL_EOM; /* no more data are expected */
Christopher Fauletef70e252020-01-28 09:26:19 +01004656 }
Christopher Fauletcf6898c2020-06-25 15:55:11 +02004657 else {
4658 /* Send ASAP informational messages. Rely on CF_EOI for final
4659 * response.
4660 */
4661 res->flags |= CF_SEND_DONTWAIT;
4662 }
Christopher Fauletef70e252020-01-28 09:26:19 +01004663
4664 data = htx->data - co_data(res);
4665 c_adv(res, data);
4666 htx->first = -1;
4667 res->total += data;
4668 return 1;
4669}
4670
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004671void http_server_error(struct stream *s, struct stream_interface *si, int err,
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004672 int finst, struct http_reply *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004673{
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004674 http_reply_and_close(s, s->txn->status, msg);
Christopher Faulet0f226952018-10-22 09:29:56 +02004675 if (!(s->flags & SF_ERR_MASK))
4676 s->flags |= err;
4677 if (!(s->flags & SF_FINST_MASK))
4678 s->flags |= finst;
4679}
4680
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004681void http_reply_and_close(struct stream *s, short status, struct http_reply *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004682{
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004683 if (!msg) {
4684 channel_htx_truncate(&s->res, htxbuf(&s->res.buf));
4685 goto end;
4686 }
4687
4688 if (http_reply_message(s, msg) == -1) {
4689 /* On error, return a 500 error message, but don't rewrite it if
Christopher Faulet40e6b552020-06-25 16:04:50 +02004690 * it is already an internal error. If it was already a "const"
4691 * 500 error, just fail.
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004692 */
Christopher Faulet40e6b552020-06-25 16:04:50 +02004693 if (s->txn->status == 500) {
4694 if (s->txn->flags & TX_CONST_REPLY)
4695 goto end;
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004696 s->txn->flags |= TX_CONST_REPLY;
Christopher Faulet40e6b552020-06-25 16:04:50 +02004697 }
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004698 s->txn->status = 500;
4699 s->txn->http_reply = NULL;
4700 return http_reply_and_close(s, s->txn->status, http_error_message(s));
4701 }
4702
4703end:
4704 s->res.wex = tick_add_ifset(now_ms, s->res.wto);
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004705
Christopher Fauletdb8ba102021-09-10 09:17:50 +02004706 /* At this staged, HTTP analysis is finished */
4707 s->req.analysers &= AN_REQ_FLT_END;
4708 s->req.analyse_exp = TICK_ETERNITY;
4709
4710 s->res.analysers &= AN_RES_FLT_END;
4711 s->res.analyse_exp = TICK_ETERNITY;
4712
Christopher Faulet0f226952018-10-22 09:29:56 +02004713 channel_auto_read(&s->req);
4714 channel_abort(&s->req);
4715 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004716 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004717 channel_auto_read(&s->res);
4718 channel_auto_close(&s->res);
4719 channel_shutr_now(&s->res);
Christopher Faulet0f226952018-10-22 09:29:56 +02004720}
4721
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004722struct http_reply *http_error_message(struct stream *s)
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004723{
4724 const int msgnum = http_get_status_idx(s->txn->status);
4725
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004726 if (s->txn->http_reply)
4727 return s->txn->http_reply;
4728 else if (s->be->replies[msgnum])
4729 return s->be->replies[msgnum];
4730 else if (strm_fe(s)->replies[msgnum])
4731 return strm_fe(s)->replies[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004732 else
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004733 return &http_err_replies[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004734}
4735
Christopher Faulet40e6b552020-06-25 16:04:50 +02004736/* Produces an HTX message from an http reply. Depending on the http reply type,
4737 * a, errorfile, an raw file or a log-format string is used. On success, it
4738 * returns 0. If an error occurs -1 is returned. If it fails, this function only
4739 * exits. It is the caller responsibility to do the cleanup.
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004740 */
Christopher Fauletae43b6c2020-05-27 15:24:22 +02004741int http_reply_to_htx(struct stream *s, struct htx *htx, struct http_reply *reply)
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004742{
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004743 struct buffer *errmsg;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004744 struct htx_sl *sl;
4745 struct buffer *body = NULL;
4746 const char *status, *reason, *clen, *ctype;
4747 unsigned int slflags;
4748 int ret = 0;
4749
Christopher Faulete29a97e2020-05-14 14:49:25 +02004750 /*
4751 * - HTTP_REPLY_ERRFILES unexpected here. handled as no payload if so
4752 *
4753 * - HTTP_REPLY_INDIRECT: switch on another reply if defined or handled
4754 * as no payload if NULL. the TXN status code is set with the status
4755 * of the original reply.
4756 */
4757
4758 if (reply->type == HTTP_REPLY_INDIRECT) {
4759 if (reply->body.reply)
4760 reply = reply->body.reply;
4761 }
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004762 if (reply->type == HTTP_REPLY_ERRMSG && !reply->body.errmsg) {
4763 /* get default error message */
4764 if (reply == s->txn->http_reply)
4765 s->txn->http_reply = NULL;
4766 reply = http_error_message(s);
4767 if (reply->type == HTTP_REPLY_INDIRECT) {
4768 if (reply->body.reply)
4769 reply = reply->body.reply;
4770 }
4771 }
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004772
4773 if (reply->type == HTTP_REPLY_ERRMSG) {
4774 /* implicit or explicit error message*/
4775 errmsg = reply->body.errmsg;
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004776 if (errmsg && !b_is_null(errmsg)) {
Christopher Faulet20567362020-05-15 14:52:49 +02004777 if (!htx_copy_msg(htx, errmsg))
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004778 goto fail;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004779 }
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004780 }
4781 else {
4782 /* no payload, file or log-format string */
4783 if (reply->type == HTTP_REPLY_RAW) {
4784 /* file */
4785 body = &reply->body.obj;
4786 }
4787 else if (reply->type == HTTP_REPLY_LOGFMT) {
4788 /* log-format string */
4789 body = alloc_trash_chunk();
4790 if (!body)
4791 goto fail_alloc;
4792 body->data = build_logline(s, body->area, body->size, &reply->body.fmt);
4793 }
4794 /* else no payload */
4795
4796 status = ultoa(reply->status);
4797 reason = http_get_reason(reply->status);
4798 slflags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_CLEN);
4799 if (!body || !b_data(body))
4800 slflags |= HTX_SL_F_BODYLESS;
4801 sl = htx_add_stline(htx, HTX_BLK_RES_SL, slflags, ist("HTTP/1.1"), ist(status), ist(reason));
4802 if (!sl)
4803 goto fail;
4804 sl->info.res.status = reply->status;
4805
4806 clen = (body ? ultoa(b_data(body)) : "0");
4807 ctype = reply->ctype;
4808
4809 if (!LIST_ISEMPTY(&reply->hdrs)) {
4810 struct http_reply_hdr *hdr;
4811 struct buffer *value = alloc_trash_chunk();
4812
4813 if (!value)
4814 goto fail;
4815
4816 list_for_each_entry(hdr, &reply->hdrs, list) {
4817 chunk_reset(value);
4818 value->data = build_logline(s, value->area, value->size, &hdr->value);
4819 if (b_data(value) && !htx_add_header(htx, hdr->name, ist2(b_head(value), b_data(value)))) {
4820 free_trash_chunk(value);
4821 goto fail;
4822 }
4823 chunk_reset(value);
4824 }
4825 free_trash_chunk(value);
4826 }
4827
4828 if (!htx_add_header(htx, ist("content-length"), ist(clen)) ||
4829 (body && b_data(body) && ctype && !htx_add_header(htx, ist("content-type"), ist(ctype))) ||
4830 !htx_add_endof(htx, HTX_BLK_EOH) ||
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004831 (body && b_data(body) && !htx_add_data_atonce(htx, ist2(b_head(body), b_data(body)))))
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004832 goto fail;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004833
4834 htx->flags |= HTX_FL_EOM;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004835 }
4836
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004837 leave:
4838 if (reply->type == HTTP_REPLY_LOGFMT)
4839 free_trash_chunk(body);
4840 return ret;
4841
4842 fail_alloc:
4843 if (!(s->flags & SF_ERR_MASK))
4844 s->flags |= SF_ERR_RESOURCE;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004845 /* fall through */
4846 fail:
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004847 ret = -1;
4848 goto leave;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004849}
4850
4851/* Send an http reply to the client. On success, it returns 0. If an error
Christopher Faulet40e6b552020-06-25 16:04:50 +02004852 * occurs -1 is returned and the response channel is truncated, removing this
4853 * way the faulty reply. This function may fail when the reply is formatted
4854 * (http_reply_to_htx) or when the reply is forwarded
4855 * (http_forward_proxy_resp). On the last case, it is because a
4856 * http-after-response rule fails.
Christopher Faulet97e466c2020-05-15 15:12:47 +02004857 */
4858int http_reply_message(struct stream *s, struct http_reply *reply)
4859{
4860 struct channel *res = &s->res;
4861 struct htx *htx = htx_from_buf(&res->buf);
4862
4863 if (s->txn->status == -1)
4864 s->txn->status = reply->status;
4865 channel_htx_truncate(res, htx);
4866
4867 if (http_reply_to_htx(s, htx, reply) == -1)
4868 goto fail;
4869
4870 htx_to_buf(htx, &s->res.buf);
4871 if (!http_forward_proxy_resp(s, 1))
4872 goto fail;
4873 return 0;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004874
4875 fail:
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004876 channel_htx_truncate(res, htx);
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004877 if (!(s->flags & SF_ERR_MASK))
4878 s->flags |= SF_ERR_PRXCOND;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004879 return -1;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004880}
4881
Christopher Faulet304cc402019-07-15 15:46:28 +02004882/* Return the error message corresponding to si->err_type. It is assumed
4883 * that the server side is closed. Note that err_type is actually a
4884 * bitmask, where almost only aborts may be cumulated with other
4885 * values. We consider that aborted operations are more important
4886 * than timeouts or errors due to the fact that nobody else in the
4887 * logs might explain incomplete retries. All others should avoid
4888 * being cumulated. It should normally not be possible to have multiple
4889 * aborts at once, but just in case, the first one in sequence is reported.
4890 * Note that connection errors appearing on the second request of a keep-alive
4891 * connection are not reported since this allows the client to retry.
4892 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004893void http_return_srv_error(struct stream *s, struct stream_interface *si)
Christopher Faulet304cc402019-07-15 15:46:28 +02004894{
4895 int err_type = si->err_type;
4896
4897 /* set s->txn->status for http_error_message(s) */
4898 s->txn->status = 503;
4899
4900 if (err_type & SI_ET_QUEUE_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004901 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_Q,
4902 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004903 else if (err_type & SI_ET_CONN_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004904 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_C,
4905 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4906 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004907 else if (err_type & SI_ET_QUEUE_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004908 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_Q,
4909 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004910 else if (err_type & SI_ET_QUEUE_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004911 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_Q,
4912 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004913 else if (err_type & SI_ET_CONN_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004914 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_C,
4915 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4916 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004917 else if (err_type & SI_ET_CONN_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004918 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_C,
4919 (s->flags & SF_SRV_REUSED) ? NULL :
4920 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004921 else if (err_type & SI_ET_CONN_RES)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004922 http_server_error(s, si, SF_ERR_RESOURCE, SF_FINST_C,
4923 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4924 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004925 else { /* SI_ET_CONN_OTHER and others */
4926 s->txn->status = 500;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004927 http_server_error(s, si, SF_ERR_INTERNAL, SF_FINST_C,
4928 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004929 }
4930}
4931
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004932
Christopher Faulet4a28a532019-03-01 11:19:40 +01004933/* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0
4934 * on success and -1 on error.
4935 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004936static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004937{
4938 /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
4939 * then we must send an HTTP/1.1 100 Continue intermediate response.
4940 */
4941 if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
4942 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
4943 struct ist hdr = { .ptr = "Expect", .len = 6 };
4944 struct http_hdr_ctx ctx;
4945
4946 ctx.blk = NULL;
4947 /* Expect is allowed in 1.1, look for it */
4948 if (http_find_header(htx, hdr, &ctx, 0) &&
4949 unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004950 if (http_reply_100_continue(s) == -1)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004951 return -1;
4952 http_remove_header(htx, &ctx);
4953 }
4954 }
4955 return 0;
4956}
4957
Christopher Faulet23a3c792018-11-28 10:01:23 +01004958/* Send a 100-Continue response to the client. It returns 0 on success and -1
4959 * on error. The response channel is updated accordingly.
4960 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004961static int http_reply_100_continue(struct stream *s)
Christopher Faulet23a3c792018-11-28 10:01:23 +01004962{
4963 struct channel *res = &s->res;
4964 struct htx *htx = htx_from_buf(&res->buf);
4965 struct htx_sl *sl;
4966 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
4967 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004968
4969 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4970 ist("HTTP/1.1"), ist("100"), ist("Continue"));
4971 if (!sl)
4972 goto fail;
4973 sl->info.res.status = 100;
4974
Christopher Faulet1d5ec092019-06-26 14:23:54 +02004975 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet23a3c792018-11-28 10:01:23 +01004976 goto fail;
4977
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004978 if (!http_forward_proxy_resp(s, 0))
4979 goto fail;
Christopher Faulet23a3c792018-11-28 10:01:23 +01004980 return 0;
4981
4982 fail:
4983 /* If an error occurred, remove the incomplete HTTP response from the
4984 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004985 channel_htx_truncate(res, htx);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004986 return -1;
4987}
4988
Christopher Faulet12c51e22018-11-28 15:59:42 +01004989
Christopher Faulet0f226952018-10-22 09:29:56 +02004990/*
4991 * Capture headers from message <htx> according to header list <cap_hdr>, and
4992 * fill the <cap> pointers appropriately.
4993 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004994static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
Christopher Faulet0f226952018-10-22 09:29:56 +02004995{
4996 struct cap_hdr *h;
4997 int32_t pos;
4998
Christopher Fauleta3f15502019-05-13 15:27:23 +02004999 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02005000 struct htx_blk *blk = htx_get_blk(htx, pos);
5001 enum htx_blk_type type = htx_get_blk_type(blk);
5002 struct ist n, v;
5003
5004 if (type == HTX_BLK_EOH)
5005 break;
5006 if (type != HTX_BLK_HDR)
5007 continue;
5008
5009 n = htx_get_blk_name(htx, blk);
5010
5011 for (h = cap_hdr; h; h = h->next) {
5012 if (h->namelen && (h->namelen == n.len) &&
5013 (strncasecmp(n.ptr, h->name, h->namelen) == 0)) {
5014 if (cap[h->index] == NULL)
5015 cap[h->index] =
5016 pool_alloc(h->pool);
5017
5018 if (cap[h->index] == NULL) {
5019 ha_alert("HTTP capture : out of memory.\n");
5020 break;
5021 }
5022
5023 v = htx_get_blk_value(htx, blk);
5024 if (v.len > h->len)
5025 v.len = h->len;
5026
5027 memcpy(cap[h->index], v.ptr, v.len);
5028 cap[h->index][v.len]=0;
5029 }
5030 }
5031 }
5032}
5033
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02005034/* Delete a value in a header between delimiters <from> and <next>. The header
5035 * itself is delimited by <start> and <end> pointers. The number of characters
5036 * displaced is returned, and the pointer to the first delimiter is updated if
5037 * required. The function tries as much as possible to respect the following
5038 * principles :
5039 * - replace <from> delimiter by the <next> one unless <from> points to <start>,
5040 * in which case <next> is simply removed
5041 * - set exactly one space character after the new first delimiter, unless there
5042 * are not enough characters in the block being moved to do so.
5043 * - remove unneeded spaces before the previous delimiter and after the new
5044 * one.
5045 *
5046 * It is the caller's responsibility to ensure that :
5047 * - <from> points to a valid delimiter or <start> ;
5048 * - <next> points to a valid delimiter or <end> ;
5049 * - there are non-space chars before <from>.
5050 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005051static int http_del_hdr_value(char *start, char *end, char **from, char *next)
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02005052{
5053 char *prev = *from;
5054
5055 if (prev == start) {
5056 /* We're removing the first value. eat the semicolon, if <next>
5057 * is lower than <end> */
5058 if (next < end)
5059 next++;
5060
5061 while (next < end && HTTP_IS_SPHT(*next))
5062 next++;
5063 }
5064 else {
5065 /* Remove useless spaces before the old delimiter. */
5066 while (HTTP_IS_SPHT(*(prev-1)))
5067 prev--;
5068 *from = prev;
5069
5070 /* copy the delimiter and if possible a space if we're
5071 * not at the end of the line.
5072 */
5073 if (next < end) {
5074 *prev++ = *next++;
5075 if (prev + 1 < next)
5076 *prev++ = ' ';
5077 while (next < end && HTTP_IS_SPHT(*next))
5078 next++;
5079 }
5080 }
5081 memmove(prev, next, end - next);
5082 return (prev - next);
5083}
5084
Christopher Faulet0f226952018-10-22 09:29:56 +02005085
5086/* Formats the start line of the request (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08005087 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Faulet0f226952018-10-22 09:29:56 +02005088 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005089static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Faulet0f226952018-10-22 09:29:56 +02005090{
5091 struct ist dst = ist2(str, 0);
5092
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005093 if (istcat(&dst, htx_sl_req_meth(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005094 goto end;
5095 if (dst.len + 1 > len)
5096 goto end;
5097 dst.ptr[dst.len++] = ' ';
5098
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005099 if (istcat(&dst, htx_sl_req_uri(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005100 goto end;
5101 if (dst.len + 1 > len)
5102 goto end;
5103 dst.ptr[dst.len++] = ' ';
5104
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005105 istcat(&dst, htx_sl_req_vsn(sl), len);
Christopher Faulet0f226952018-10-22 09:29:56 +02005106 end:
5107 return dst.len;
5108}
5109
5110/*
5111 * Print a debug line with a start line.
5112 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005113static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl)
Christopher Faulet0f226952018-10-22 09:29:56 +02005114{
5115 struct session *sess = strm_sess(s);
5116 int max;
5117
5118 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5119 dir,
Willy Tarreau66182592021-12-06 07:01:02 +00005120 objt_conn(sess->origin) ? (unsigned short)__objt_conn(sess->origin)->handle.fd : -1,
5121 objt_cs(s->si[1].end) ? (unsigned short)__objt_cs(s->si[1].end)->conn->handle.fd : -1);
Christopher Faulet0f226952018-10-22 09:29:56 +02005122
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005123 max = HTX_SL_P1_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005124 UBOUND(max, trash.size - trash.data - 3);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005125 chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005126 trash.area[trash.data++] = ' ';
5127
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005128 max = HTX_SL_P2_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005129 UBOUND(max, trash.size - trash.data - 2);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005130 chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005131 trash.area[trash.data++] = ' ';
5132
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005133 max = HTX_SL_P3_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005134 UBOUND(max, trash.size - trash.data - 1);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005135 chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005136 trash.area[trash.data++] = '\n';
5137
Willy Tarreau2e8ab6b2020-03-14 11:03:20 +01005138 DISGUISE(write(1, trash.area, trash.data));
Christopher Faulet0f226952018-10-22 09:29:56 +02005139}
5140
5141/*
5142 * Print a debug line with a header.
5143 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005144static void http_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v)
Christopher Faulet0f226952018-10-22 09:29:56 +02005145{
5146 struct session *sess = strm_sess(s);
5147 int max;
5148
5149 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5150 dir,
Willy Tarreau66182592021-12-06 07:01:02 +00005151 objt_conn(sess->origin) ? (unsigned short)__objt_conn(sess->origin)->handle.fd : -1,
5152 objt_cs(s->si[1].end) ? (unsigned short)__objt_cs(s->si[1].end)->conn->handle.fd : -1);
Christopher Faulet0f226952018-10-22 09:29:56 +02005153
5154 max = n.len;
5155 UBOUND(max, trash.size - trash.data - 3);
5156 chunk_memcat(&trash, n.ptr, max);
5157 trash.area[trash.data++] = ':';
5158 trash.area[trash.data++] = ' ';
5159
5160 max = v.len;
5161 UBOUND(max, trash.size - trash.data - 1);
5162 chunk_memcat(&trash, v.ptr, max);
5163 trash.area[trash.data++] = '\n';
5164
Willy Tarreau2e8ab6b2020-03-14 11:03:20 +01005165 DISGUISE(write(1, trash.area, trash.data));
Christopher Faulet0f226952018-10-22 09:29:56 +02005166}
5167
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005168/* Allocate a new HTTP transaction for stream <s> unless there is one already.
5169 * In case of allocation failure, everything allocated is freed and NULL is
5170 * returned. Otherwise the new transaction is assigned to the stream and
5171 * returned.
5172 */
5173struct http_txn *http_alloc_txn(struct stream *s)
5174{
5175 struct http_txn *txn = s->txn;
5176
5177 if (txn)
5178 return txn;
5179
5180 txn = pool_alloc(pool_head_http_txn);
5181 if (!txn)
5182 return txn;
5183
5184 s->txn = txn;
5185 return txn;
5186}
5187
5188void http_txn_reset_req(struct http_txn *txn)
5189{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005190 txn->req.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005191 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
5192}
5193
5194void http_txn_reset_res(struct http_txn *txn)
5195{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005196 txn->rsp.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005197 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
5198}
5199
5200/*
Christopher Faulet75f619a2021-03-08 19:12:58 +01005201 * Create and initialize a new HTTP transaction for stream <s>. This should be
5202 * used before processing any new request. It returns the transaction or NLULL
5203 * on error.
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005204 */
Christopher Faulet75f619a2021-03-08 19:12:58 +01005205struct http_txn *http_create_txn(struct stream *s)
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005206{
Christopher Faulet75f619a2021-03-08 19:12:58 +01005207 struct http_txn *txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005208 struct conn_stream *cs = objt_cs(s->si[0].end);
5209
Christopher Faulet75f619a2021-03-08 19:12:58 +01005210 txn = pool_alloc(pool_head_http_txn);
5211 if (!txn)
5212 return NULL;
5213 s->txn = txn;
5214
Christopher Fauletdb7ced02022-06-22 17:12:05 +02005215 txn->meth = HTTP_METH_OTHER;
Christopher Fauletda831fa2020-10-06 17:58:43 +02005216 txn->flags = ((cs && cs->flags & CS_FL_NOT_FIRST) ? TX_NOT_FIRST : 0);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005217 txn->status = -1;
Christopher Faulet5cb513a2020-05-13 17:56:56 +02005218 txn->http_reply = NULL;
Willy Tarreau8b507582020-02-25 09:35:07 +01005219 write_u32(txn->cache_hash, 0);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005220
5221 txn->cookie_first_date = 0;
5222 txn->cookie_last_date = 0;
5223
5224 txn->srv_cookie = NULL;
5225 txn->cli_cookie = NULL;
5226 txn->uri = NULL;
5227
5228 http_txn_reset_req(txn);
5229 http_txn_reset_res(txn);
5230
5231 txn->req.chn = &s->req;
5232 txn->rsp.chn = &s->res;
5233
5234 txn->auth.method = HTTP_AUTH_UNKNOWN;
5235
Aurelien DARRAGON32e8e9b2022-11-18 09:17:29 +01005236 /* here we don't want to re-initialize s->vars_txn and s->vars_reqres
5237 * variable lists, because they were already initialized upon stream
5238 * creation in stream_new(), and thus may already contain some variables
5239 */
Christopher Faulet75f619a2021-03-08 19:12:58 +01005240
5241 return txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005242}
5243
5244/* to be used at the end of a transaction */
Christopher Faulet75f619a2021-03-08 19:12:58 +01005245void http_destroy_txn(struct stream *s)
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005246{
5247 struct http_txn *txn = s->txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005248
5249 /* these ones will have been dynamically allocated */
5250 pool_free(pool_head_requri, txn->uri);
5251 pool_free(pool_head_capture, txn->cli_cookie);
5252 pool_free(pool_head_capture, txn->srv_cookie);
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005253 pool_free(pool_head_uniqueid, s->unique_id.ptr);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005254
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005255 s->unique_id = IST_NULL;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005256 txn->uri = NULL;
5257 txn->srv_cookie = NULL;
5258 txn->cli_cookie = NULL;
5259
Christopher Faulet59399252019-11-07 14:27:52 +01005260 if (!LIST_ISEMPTY(&s->vars_txn.head))
5261 vars_prune(&s->vars_txn, s->sess, s);
5262 if (!LIST_ISEMPTY(&s->vars_reqres.head))
5263 vars_prune(&s->vars_reqres, s->sess, s);
Christopher Faulet75f619a2021-03-08 19:12:58 +01005264
5265 pool_free(pool_head_http_txn, txn);
5266 s->txn = NULL;
Christopher Faulet59399252019-11-07 14:27:52 +01005267}
5268
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005269
5270DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn));
Christopher Faulet0f226952018-10-22 09:29:56 +02005271
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005272__attribute__((constructor))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005273static void __http_protocol_init(void)
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005274{
5275}
5276
5277
5278/*
5279 * Local variables:
5280 * c-indent-level: 8
5281 * c-basic-offset: 8
5282 * End:
5283 */