blob: 2e2095b88c359ae34d7de1ca5b2cb657643f51ed [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 Fauletb1875342021-05-26 12:15:37 +02001393 /* Perform a L7 retry because server refuses the early data. */
1394 if ((si_b->flags & SI_FL_L7_RETRY) &&
1395 (s->be->retry_type & PR_RE_EARLY_ERROR) &&
1396 conn && conn->err_code == CO_ER_SSL_EARLY_FAILED &&
1397 do_l7_retry(s, si_b) == 0) {
1398 DBG_TRACE_DEVEL("leaving on L7 retry",
1399 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1400 return 0;
1401 }
1402
Olivier Houchard6db16992019-05-17 15:40:49 +02001403 if (txn->flags & TX_NOT_FIRST)
1404 goto abort_keep_alive;
1405
Willy Tarreau4781b152021-04-06 13:53:36 +02001406 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001407 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001408 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001409 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001410 }
1411
Christopher Fauletb1875342021-05-26 12:15:37 +02001412 /* if the server refused the early data, just send a 425 */
1413 if (conn && conn->err_code == CO_ER_SSL_EARLY_FAILED)
Olivier Houchard865d8392019-05-03 22:46:27 +02001414 txn->status = 425;
Christopher Fauletb1875342021-05-26 12:15:37 +02001415 else {
1416 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001417 stream_inc_http_fail_ctr(s);
Christopher Fauletb1875342021-05-26 12:15:37 +02001418 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001419
1420 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001421 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001422
1423 if (!(s->flags & SF_ERR_MASK))
1424 s->flags |= SF_ERR_SRVCL;
1425 if (!(s->flags & SF_FINST_MASK))
1426 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001427 DBG_TRACE_DEVEL("leaving on error",
1428 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001429 return 0;
1430 }
1431
Christopher Faulet9768c262018-10-22 09:34:31 +02001432 /* 2: read timeout : return a 504 to the client. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001433 else if (rep->flags & CF_READ_TIMEOUT) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001434 if ((si_b->flags & SI_FL_L7_RETRY) &&
1435 (s->be->retry_type & PR_RE_TIMEOUT)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001436 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1437 DBG_TRACE_DEVEL("leaving on L7 retry",
1438 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001439 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001440 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001441 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001442 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001443 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001444 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001445 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001446 }
1447
Christopher Faulete0768eb2018-10-03 16:38:02 +02001448 txn->status = 504;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001449 stream_inc_http_fail_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001450 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001451 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001452
1453 if (!(s->flags & SF_ERR_MASK))
1454 s->flags |= SF_ERR_SRVTO;
1455 if (!(s->flags & SF_FINST_MASK))
1456 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001457 DBG_TRACE_DEVEL("leaving on error",
1458 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001459 return 0;
1460 }
1461
Christopher Faulet9768c262018-10-22 09:34:31 +02001462 /* 3: client abort with an abortonclose */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001463 else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001464 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
1465 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01001466 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001467 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001468 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001469 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001470
Christopher Faulete0768eb2018-10-03 16:38:02 +02001471 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001472 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001473
1474 if (!(s->flags & SF_ERR_MASK))
1475 s->flags |= SF_ERR_CLICL;
1476 if (!(s->flags & SF_FINST_MASK))
1477 s->flags |= SF_FINST_H;
1478
1479 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001480 DBG_TRACE_DEVEL("leaving on error",
1481 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001482 return 0;
1483 }
1484
Christopher Faulet9768c262018-10-22 09:34:31 +02001485 /* 4: close from server, capture the response if the server has started to respond */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001486 else if (rep->flags & CF_SHUTR) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001487 if ((si_b->flags & SI_FL_L7_RETRY) &&
1488 (s->be->retry_type & PR_RE_DISCONNECTED)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001489 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1490 DBG_TRACE_DEVEL("leaving on L7 retry",
1491 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001492 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001493 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001494 }
1495
Olivier Houchard6db16992019-05-17 15:40:49 +02001496 if (txn->flags & TX_NOT_FIRST)
1497 goto abort_keep_alive;
1498
Willy Tarreau4781b152021-04-06 13:53:36 +02001499 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001500 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001501 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001502 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001503 }
1504
Christopher Faulete0768eb2018-10-03 16:38:02 +02001505 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001506 stream_inc_http_fail_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001507 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001508 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001509
1510 if (!(s->flags & SF_ERR_MASK))
1511 s->flags |= SF_ERR_SRVCL;
1512 if (!(s->flags & SF_FINST_MASK))
1513 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001514 DBG_TRACE_DEVEL("leaving on error",
1515 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001516 return 0;
1517 }
1518
Christopher Faulet9768c262018-10-22 09:34:31 +02001519 /* 5: write error to client (we don't send any message then) */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001520 else if (rep->flags & CF_WRITE_ERROR) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001521 if (txn->flags & TX_NOT_FIRST)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001522 goto abort_keep_alive;
1523
Willy Tarreau4781b152021-04-06 13:53:36 +02001524 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001525 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001526 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001527 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001528
1529 if (!(s->flags & SF_ERR_MASK))
1530 s->flags |= SF_ERR_CLICL;
1531 if (!(s->flags & SF_FINST_MASK))
1532 s->flags |= SF_FINST_H;
1533
1534 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001535 DBG_TRACE_DEVEL("leaving on error",
1536 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001537 return 0;
1538 }
1539
1540 channel_dont_close(rep);
1541 rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001542 DBG_TRACE_DEVEL("waiting for more data",
1543 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001544 return 0;
1545 }
1546
1547 /* More interesting part now : we know that we have a complete
1548 * response which at least looks like HTTP. We have an indicator
1549 * of each header's length, so we can parse them quickly.
1550 */
Christopher Faulet29f17582019-05-23 11:03:26 +02001551 BUG_ON(htx_get_first_type(htx) != HTX_BLK_RES_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +02001552 sl = http_get_stline(htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001553
Christopher Faulet0f66d552021-05-26 13:14:39 +02001554 /* Perform a L7 retry because of the status code */
1555 if ((si_b->flags & SI_FL_L7_RETRY) &&
1556 l7_status_match(s->be, sl->info.res.status) &&
1557 do_l7_retry(s, si_b) == 0) {
1558 DBG_TRACE_DEVEL("leaving on L7 retry", STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
1559 return 0;
1560 }
1561
1562 /* Now, L7 buffer is useless, it can be released */
1563 b_free(&s->si[1].l7_buffer);
1564
1565 msg->msg_state = HTTP_MSG_BODY;
1566
1567
Christopher Faulet9768c262018-10-22 09:34:31 +02001568 /* 0: we might have to print this header in debug mode */
1569 if (unlikely((global.mode & MODE_DEBUG) &&
1570 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
1571 int32_t pos;
1572
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001573 http_debug_stline("srvrep", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +02001574
Christopher Fauleta3f15502019-05-13 15:27:23 +02001575 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001576 struct htx_blk *blk = htx_get_blk(htx, pos);
1577 enum htx_blk_type type = htx_get_blk_type(blk);
1578
1579 if (type == HTX_BLK_EOH)
1580 break;
1581 if (type != HTX_BLK_HDR)
1582 continue;
1583
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001584 http_debug_hdr("srvhdr", s,
1585 htx_get_blk_name(htx, blk),
1586 htx_get_blk_value(htx, blk));
Christopher Faulet9768c262018-10-22 09:34:31 +02001587 }
1588 }
1589
Christopher Faulet03599112018-11-27 11:21:21 +01001590 /* 1: get the status code and the version. Also set HTTP flags */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001591 txn->status = sl->info.res.status;
Christopher Faulet03599112018-11-27 11:21:21 +01001592 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +02001593 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +01001594 if (sl->flags & HTX_SL_F_XFER_LEN) {
1595 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet2a408542020-11-20 14:22:37 +01001596 if (sl->flags & HTX_SL_F_CLEN)
1597 msg->flags |= HTTP_MSGF_CNT_LEN;
1598 else if (sl->flags & HTX_SL_F_CHNK)
1599 msg->flags |= HTTP_MSGF_TE_CHNK;
Christopher Faulet03599112018-11-27 11:21:21 +01001600 }
Christopher Faulet2a408542020-11-20 14:22:37 +01001601 if (sl->flags & HTX_SL_F_BODYLESS)
1602 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulet576c3582021-01-08 15:53:01 +01001603 if (sl->flags & HTX_SL_F_CONN_UPG)
1604 msg->flags |= HTTP_MSGF_CONN_UPG;
Christopher Faulet9768c262018-10-22 09:34:31 +02001605
1606 n = txn->status / 100;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001607 if (n < 1 || n > 5)
1608 n = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001609
Christopher Faulete0768eb2018-10-03 16:38:02 +02001610 /* when the client triggers a 4xx from the server, it's most often due
1611 * to a missing object or permission. These events should be tracked
1612 * because if they happen often, it may indicate a brute force or a
1613 * vulnerability scan.
1614 */
1615 if (n == 4)
1616 stream_inc_http_err_ctr(s);
1617
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001618 if (n == 5 && txn->status != 501 && txn->status != 505)
1619 stream_inc_http_fail_ctr(s);
1620
Marcin Deranek3c27dda2020-05-15 18:32:51 +02001621 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001622 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.p.http.rsp[n]);
1623 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.p.http.cum_req);
Marcin Deranek3c27dda2020-05-15 18:32:51 +02001624 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001625
Christopher Faulete0768eb2018-10-03 16:38:02 +02001626 /* Adjust server's health based on status code. Note: status codes 501
1627 * and 505 are triggered on demand by client request, so we must not
1628 * count them as server failures.
1629 */
1630 if (objt_server(s->target)) {
1631 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001632 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001633 else
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001634 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001635 }
1636
1637 /*
1638 * We may be facing a 100-continue response, or any other informational
1639 * 1xx response which is non-final, in which case this is not the right
1640 * response, and we're waiting for the next one. Let's allow this response
1641 * to go to the client and wait for the next one. There's an exception for
1642 * 101 which is used later in the code to switch protocols.
1643 */
1644 if (txn->status < 200 &&
1645 (txn->status == 100 || txn->status >= 102)) {
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001646 FLT_STRM_CB(s, flt_http_reset(s, msg));
Christopher Faulet421e7692019-06-13 11:16:45 +02001647 htx->first = channel_htx_fwd_headers(rep, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001648 msg->msg_state = HTTP_MSG_RPBEFORE;
Christopher Faulet3499f622019-09-03 15:23:54 +02001649 msg->flags = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001650 txn->status = 0;
1651 s->logs.t_data = -1; /* was not a response yet */
Christopher Faulet7d518452020-08-31 11:07:07 +02001652 rep->flags |= CF_SEND_DONTWAIT; /* Send ASAP informational messages */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001653 goto next_one;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001654 }
1655
Christopher Faulet6e6c7b12021-01-08 16:02:05 +01001656 /* A 101-switching-protocols must contains a Connection header with the
1657 * "upgrade" option and the request too. It means both are agree to
1658 * upgrade. It is not so strict because there is no test on the Upgrade
1659 * header content. But it is probably stronger enough for now.
1660 */
1661 if (txn->status == 101 &&
1662 (!(txn->req.flags & HTTP_MSGF_CONN_UPG) || !(txn->rsp.flags & HTTP_MSGF_CONN_UPG)))
1663 goto return_bad_res;
1664
Christopher Faulete0768eb2018-10-03 16:38:02 +02001665 /*
1666 * 2: check for cacheability.
1667 */
1668
1669 switch (txn->status) {
1670 case 200:
1671 case 203:
1672 case 204:
1673 case 206:
1674 case 300:
1675 case 301:
1676 case 404:
1677 case 405:
1678 case 410:
1679 case 414:
1680 case 501:
1681 break;
1682 default:
1683 /* RFC7231#6.1:
1684 * Responses with status codes that are defined as
1685 * cacheable by default (e.g., 200, 203, 204, 206,
1686 * 300, 301, 404, 405, 410, 414, and 501 in this
1687 * specification) can be reused by a cache with
1688 * heuristic expiration unless otherwise indicated
1689 * by the method definition or explicit cache
1690 * controls [RFC7234]; all other status codes are
1691 * not cacheable by default.
1692 */
1693 txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
1694 break;
1695 }
1696
1697 /*
1698 * 3: we may need to capture headers
1699 */
1700 s->logs.logwait &= ~LW_RESP;
1701 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001702 http_capture_headers(htx, s->res_cap, sess->fe->rsp_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001703
Christopher Faulet9768c262018-10-22 09:34:31 +02001704 /* Skip parsing if no content length is possible. */
Christopher Fauletc75668e2020-12-07 18:10:32 +01001705 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) ||
Christopher Faulete0768eb2018-10-03 16:38:02 +02001706 txn->status == 101)) {
1707 /* Either we've established an explicit tunnel, or we're
1708 * switching the protocol. In both cases, we're very unlikely
1709 * to understand the next protocols. We have to switch to tunnel
1710 * mode, so that we transfer the request and responses then let
1711 * this protocol pass unmodified. When we later implement specific
1712 * parsers for such protocols, we'll want to check the Upgrade
1713 * header which contains information about that protocol for
1714 * responses with status 101 (eg: see RFC2817 about TLS).
1715 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02001716 txn->flags |= TX_CON_WANT_TUN;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001717 }
1718
Christopher Faulet61608322018-11-23 16:23:45 +01001719 /* check for NTML authentication headers in 401 (WWW-Authenticate) and
1720 * 407 (Proxy-Authenticate) responses and set the connection to private
1721 */
1722 srv_conn = cs_conn(objt_cs(s->si[1].end));
1723 if (srv_conn) {
1724 struct ist hdr;
1725 struct http_hdr_ctx ctx;
1726
1727 if (txn->status == 401)
1728 hdr = ist("WWW-Authenticate");
1729 else if (txn->status == 407)
1730 hdr = ist("Proxy-Authenticate");
1731 else
1732 goto end;
1733
1734 ctx.blk = NULL;
1735 while (http_find_header(htx, hdr, &ctx, 0)) {
Willy Tarreauf1dcced2020-05-07 19:27:02 +02001736 /* If www-authenticate contains "Negotiate", "Nego2", or "NTLM",
1737 * possibly followed by blanks and a base64 string, the connection
1738 * is private. Since it's a mess to deal with, we only check for
1739 * values starting with "NTLM" or "Nego". Note that often multiple
1740 * headers are sent by the server there.
1741 */
1742 if ((ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "Nego", 4) == 0) ||
Willy Tarreau49a1d282020-05-07 19:10:15 +02001743 (ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "NTLM", 4) == 0)) {
Olivier Houchard250031e2019-05-29 15:01:50 +02001744 sess->flags |= SESS_FL_PREFER_LAST;
Christopher Faulet08016ab2020-07-01 16:10:06 +02001745 conn_set_owner(srv_conn, sess, NULL);
Christopher Faulet21ddc742020-07-01 15:26:14 +02001746 conn_set_private(srv_conn);
Ilya Shipitsin6b79f382020-07-23 00:32:55 +05001747 /* If it fail now, the same will be done in mux->detach() callback */
Christopher Faulet08016ab2020-07-01 16:10:06 +02001748 session_add_conn(srv_conn->owner, srv_conn, srv_conn->target);
Willy Tarreauf1dcced2020-05-07 19:27:02 +02001749 break;
Olivier Houchard250031e2019-05-29 15:01:50 +02001750 }
Christopher Faulet61608322018-11-23 16:23:45 +01001751 }
1752 }
1753
1754 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001755 /* we want to have the response time before we start processing it */
1756 s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
1757
1758 /* end of job, return OK */
1759 rep->analysers &= ~an_bit;
1760 rep->analyse_exp = TICK_ETERNITY;
1761 channel_auto_close(rep);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001762 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001763 return 1;
1764
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001765 return_int_err:
Willy Tarreau4781b152021-04-06 13:53:36 +02001766 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
1767 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +01001768 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02001769 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001770 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02001771 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001772 txn->status = 500;
1773 if (!(s->flags & SF_ERR_MASK))
1774 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001775 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001776
1777 return_bad_res:
Willy Tarreau4781b152021-04-06 13:53:36 +02001778 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulet47365272018-10-31 17:40:50 +01001779 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02001780 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001781 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
Christopher Faulet47365272018-10-31 17:40:50 +01001782 }
Olivier Houcharde3249a92019-05-03 23:01:47 +02001783 if ((s->be->retry_type & PR_RE_JUNK_REQUEST) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001784 (si_b->flags & SI_FL_L7_RETRY) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001785 do_l7_retry(s, si_b) == 0) {
1786 DBG_TRACE_DEVEL("leaving on L7 retry",
1787 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharde3249a92019-05-03 23:01:47 +02001788 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001789 }
Christopher Faulet47365272018-10-31 17:40:50 +01001790 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01001791 stream_inc_http_fail_ctr(s);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001792 /* fall through */
1793
Christopher Fauletb8a53712019-12-16 11:29:38 +01001794 return_prx_cond:
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001795 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet47365272018-10-31 17:40:50 +01001796
1797 if (!(s->flags & SF_ERR_MASK))
1798 s->flags |= SF_ERR_PRXCOND;
1799 if (!(s->flags & SF_FINST_MASK))
1800 s->flags |= SF_FINST_H;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001801
1802 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001803 DBG_TRACE_DEVEL("leaving on error",
1804 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulet47365272018-10-31 17:40:50 +01001805 return 0;
1806
Christopher Faulete0768eb2018-10-03 16:38:02 +02001807 abort_keep_alive:
1808 /* A keep-alive request to the server failed on a network error.
1809 * The client is required to retry. We need to close without returning
1810 * any other information so that the client retries.
1811 */
1812 txn->status = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001813 s->logs.logwait = 0;
1814 s->logs.level = 0;
1815 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001816 http_reply_and_close(s, txn->status, NULL);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001817 DBG_TRACE_DEVEL("leaving by closing K/A connection",
1818 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001819 return 0;
1820}
1821
1822/* This function performs all the processing enabled for the current response.
1823 * It normally returns 1 unless it wants to break. It relies on buffers flags,
1824 * and updates s->res.analysers. It might make sense to explode it into several
1825 * other functions. It works like process_request (see indications above).
1826 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001827int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001828{
1829 struct session *sess = s->sess;
1830 struct http_txn *txn = s->txn;
1831 struct http_msg *msg = &txn->rsp;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001832 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001833 struct proxy *cur_proxy;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001834 enum rule_result ret = HTTP_RULE_RES_CONT;
1835
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001836 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
1837 return 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001838
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001839 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001840
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001841 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001842
1843 /* The stats applet needs to adjust the Connection header but we don't
1844 * apply any filter there.
1845 */
1846 if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
1847 rep->analysers &= ~an_bit;
1848 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001849 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001850 }
1851
1852 /*
1853 * We will have to evaluate the filters.
1854 * As opposed to version 1.2, now they will be evaluated in the
1855 * filters order and not in the header order. This means that
1856 * each filter has to be validated among all headers.
1857 *
1858 * Filters are tried with ->be first, then with ->fe if it is
1859 * different from ->be.
1860 *
1861 * Maybe we are in resume condiion. In this case I choose the
1862 * "struct proxy" which contains the rule list matching the resume
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001863 * pointer. If none of these "struct proxy" match, I initialise
Christopher Faulete0768eb2018-10-03 16:38:02 +02001864 * the process with the first one.
1865 *
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001866 * In fact, I check only correspondence between the current list
Christopher Faulete0768eb2018-10-03 16:38:02 +02001867 * pointer and the ->fe rule list. If it doesn't match, I initialize
1868 * the loop with the ->be.
1869 */
1870 if (s->current_rule_list == &sess->fe->http_res_rules)
1871 cur_proxy = sess->fe;
1872 else
1873 cur_proxy = s->be;
1874 while (1) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001875 /* evaluate http-response rules */
Christopher Fauletb4c4a972021-11-09 16:33:25 +01001876 if (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001877 ret = http_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001878
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001879 switch (ret) {
1880 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
1881 goto return_prx_yield;
1882
1883 case HTTP_RULE_RES_CONT:
1884 case HTTP_RULE_RES_STOP: /* nothing to do */
1885 break;
1886
1887 case HTTP_RULE_RES_DENY: /* deny or tarpit */
1888 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001889
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001890 case HTTP_RULE_RES_ABRT: /* abort request, response already sent */
1891 goto return_prx_cond;
1892
1893 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
Christopher Fauletb8a53712019-12-16 11:29:38 +01001894 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001895
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001896 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
1897 goto return_bad_res;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001898
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001899 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
1900 goto return_int_err;
1901 }
1902
1903 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001904
Christopher Faulete0768eb2018-10-03 16:38:02 +02001905 /* check whether we're already working on the frontend */
1906 if (cur_proxy == sess->fe)
1907 break;
1908 cur_proxy = sess->fe;
1909 }
1910
Christopher Faulete0768eb2018-10-03 16:38:02 +02001911 /* OK that's all we can do for 1xx responses */
1912 if (unlikely(txn->status < 200 && txn->status != 101))
Christopher Fauletf2824e62018-10-01 12:12:37 +02001913 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001914
1915 /*
1916 * Now check for a server cookie.
1917 */
1918 if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001919 http_manage_server_side_cookies(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001920
1921 /*
1922 * Check for cache-control or pragma headers if required.
1923 */
1924 if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001925 http_check_response_for_cacheability(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001926
1927 /*
1928 * Add server cookie in the response if needed
1929 */
1930 if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
1931 !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
1932 (!(s->flags & SF_DIRECT) ||
1933 ((s->be->cookie_maxidle || txn->cookie_last_date) &&
1934 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
1935 (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
1936 (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
1937 (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
1938 !(s->flags & SF_IGNORE_PRST)) {
1939 /* the server is known, it's not the one the client requested, or the
1940 * cookie's last seen date needs to be refreshed. We have to
1941 * insert a set-cookie here, except if we want to insert only on POST
1942 * requests and this one isn't. Note that servers which don't have cookies
1943 * (eg: some backup servers) will return a full cookie removal request.
1944 */
Willy Tarreau66182592021-12-06 07:01:02 +00001945 if (!__objt_server(s->target)->cookie) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001946 chunk_printf(&trash,
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001947 "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
Christopher Faulete0768eb2018-10-03 16:38:02 +02001948 s->be->cookie_name);
1949 }
1950 else {
Willy Tarreau66182592021-12-06 07:01:02 +00001951 chunk_printf(&trash, "%s=%s", s->be->cookie_name, __objt_server(s->target)->cookie);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001952
1953 if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
1954 /* emit last_date, which is mandatory */
1955 trash.area[trash.data++] = COOKIE_DELIM_DATE;
1956 s30tob64((date.tv_sec+3) >> 2,
1957 trash.area + trash.data);
1958 trash.data += 5;
1959
1960 if (s->be->cookie_maxlife) {
1961 /* emit first_date, which is either the original one or
1962 * the current date.
1963 */
1964 trash.area[trash.data++] = COOKIE_DELIM_DATE;
1965 s30tob64(txn->cookie_first_date ?
1966 txn->cookie_first_date >> 2 :
1967 (date.tv_sec+3) >> 2,
1968 trash.area + trash.data);
1969 trash.data += 5;
1970 }
1971 }
1972 chunk_appendf(&trash, "; path=/");
1973 }
1974
1975 if (s->be->cookie_domain)
1976 chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
1977
1978 if (s->be->ck_opts & PR_CK_HTTPONLY)
1979 chunk_appendf(&trash, "; HttpOnly");
1980
1981 if (s->be->ck_opts & PR_CK_SECURE)
1982 chunk_appendf(&trash, "; Secure");
1983
Christopher Faulet2f533902020-01-21 11:06:48 +01001984 if (s->be->cookie_attrs)
1985 chunk_appendf(&trash, "; %s", s->be->cookie_attrs);
1986
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001987 if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data))))
Christopher Faulet028c1642022-06-01 17:42:35 +02001988 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001989
1990 txn->flags &= ~TX_SCK_MASK;
1991 if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
1992 /* the server did not change, only the date was updated */
1993 txn->flags |= TX_SCK_UPDATED;
1994 else
1995 txn->flags |= TX_SCK_INSERTED;
1996
1997 /* Here, we will tell an eventual cache on the client side that we don't
1998 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
1999 * Some caches understand the correct form: 'no-cache="set-cookie"', but
2000 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
2001 */
2002 if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
2003
2004 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
2005
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002006 if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private"))))
Christopher Faulet028c1642022-06-01 17:42:35 +02002007 goto return_fail_rewrite;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002008 }
2009 }
2010
2011 /*
2012 * Check if result will be cacheable with a cookie.
2013 * We'll block the response if security checks have caught
2014 * nasty things such as a cacheable cookie.
2015 */
2016 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
2017 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
2018 (s->be->options & PR_O_CHK_CACHE)) {
2019 /* we're in presence of a cacheable response containing
2020 * a set-cookie header. We'll block it as requested by
2021 * the 'checkcache' option, and send an alert.
2022 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002023 ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau66182592021-12-06 07:01:02 +00002024 s->be->id, objt_server(s->target) ? __objt_server(s->target)->id : "<dispatch>");
Christopher Faulete0768eb2018-10-03 16:38:02 +02002025 send_log(s->be, LOG_ALERT,
2026 "Blocking cacheable cookie in response from instance %s, server %s.\n",
Willy Tarreau66182592021-12-06 07:01:02 +00002027 s->be->id, objt_server(s->target) ? __objt_server(s->target)->id : "<dispatch>");
Christopher Fauletb8a53712019-12-16 11:29:38 +01002028 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002029 }
2030
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002031 end:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002032 /*
2033 * Evaluate after-response rules before forwarding the response. rules
2034 * from the backend are evaluated first, then one from the frontend if
2035 * it differs.
2036 */
2037 if (!http_eval_after_res_rules(s))
2038 goto return_int_err;
2039
Christopher Fauletc2ac5e42021-03-08 18:20:09 +01002040 /* Filter the response headers if there are filters attached to the
2041 * stream.
2042 */
2043 if (HAS_FILTERS(s))
2044 rep->analysers |= AN_RES_FLT_HTTP_HDRS;
2045
Christopher Faulete0768eb2018-10-03 16:38:02 +02002046 /* Always enter in the body analyzer */
2047 rep->analysers &= ~AN_RES_FLT_XFER_DATA;
2048 rep->analysers |= AN_RES_HTTP_XFER_BODY;
2049
2050 /* if the user wants to log as soon as possible, without counting
2051 * bytes from the server, then this is the right moment. We have
2052 * to temporarily assign bytes_out to log what we currently have.
2053 */
2054 if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
2055 s->logs.t_close = s->logs.t_data; /* to get a valid end date */
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002056 s->logs.bytes_out = htx->data;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002057 s->do_log(s);
2058 s->logs.bytes_out = 0;
2059 }
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002060
Christopher Fauletb8a53712019-12-16 11:29:38 +01002061 done:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002062 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002063 rep->analysers &= ~an_bit;
2064 rep->analyse_exp = TICK_ETERNITY;
2065 return 1;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002066
Christopher Fauletb8a53712019-12-16 11:29:38 +01002067 deny:
Willy Tarreau4781b152021-04-06 13:53:36 +02002068 _HA_ATOMIC_INC(&sess->fe->fe_counters.denied_resp);
2069 _HA_ATOMIC_INC(&s->be->be_counters.denied_resp);
William Lallemand36119de2021-03-08 15:26:48 +01002070 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002071 _HA_ATOMIC_INC(&sess->listener->counters->denied_resp);
Christopher Fauleta08546b2019-12-16 16:07:34 +01002072 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002073 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.denied_resp);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002074 goto return_prx_err;
2075
Christopher Faulet028c1642022-06-01 17:42:35 +02002076 return_fail_rewrite:
2077 if (!(s->flags & SF_ERR_MASK))
2078 s->flags |= SF_ERR_PRXCOND;
2079 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_rewrites);
2080 _HA_ATOMIC_INC(&s->be->be_counters.failed_rewrites);
2081 if (sess->listener && sess->listener->counters)
2082 _HA_ATOMIC_INC(&sess->listener->counters->failed_rewrites);
2083 if (objt_server(s->target))
2084 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_rewrites);
2085 /* fall through */
2086
Christopher Fauletb8a53712019-12-16 11:29:38 +01002087 return_int_err:
2088 txn->status = 500;
2089 if (!(s->flags & SF_ERR_MASK))
2090 s->flags |= SF_ERR_INTERNAL;
Willy Tarreau4781b152021-04-06 13:53:36 +02002091 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
2092 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
Dragan Dosen84426cd2021-09-21 13:02:09 +02002093 if (sess->listener && sess->listener->counters)
2094 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002095 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002096 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002097 goto return_prx_err;
2098
2099 return_bad_res:
2100 txn->status = 502;
Willy Tarreau826f3ab2021-02-10 12:07:15 +01002101 stream_inc_http_fail_ctr(s);
Willy Tarreau4781b152021-04-06 13:53:36 +02002102 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Fauleta20a6532020-02-05 10:16:41 +01002103 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02002104 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Christopher Fauleta20a6532020-02-05 10:16:41 +01002105 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2106 }
Christopher Fauletb8a53712019-12-16 11:29:38 +01002107 /* fall through */
2108
2109 return_prx_err:
2110 http_reply_and_close(s, txn->status, http_error_message(s));
2111 /* fall through */
2112
2113 return_prx_cond:
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002114 s->logs.t_data = -1; /* was not a valid response */
2115 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002116
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002117 if (!(s->flags & SF_ERR_MASK))
2118 s->flags |= SF_ERR_PRXCOND;
2119 if (!(s->flags & SF_FINST_MASK))
2120 s->flags |= SF_FINST_H;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002121
Christopher Faulete58c0002020-03-02 16:21:01 +01002122 rep->analysers &= AN_RES_FLT_END;
2123 s->req.analysers &= AN_REQ_FLT_END;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002124 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002125 DBG_TRACE_DEVEL("leaving on error",
2126 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002127 return 0;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002128
2129 return_prx_yield:
2130 channel_dont_close(rep);
2131 DBG_TRACE_DEVEL("waiting for more data",
2132 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2133 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002134}
2135
2136/* This function is an analyser which forwards response body (including chunk
2137 * sizes if any). It is called as soon as we must forward, even if we forward
2138 * zero byte. The only situation where it must not be called is when we're in
2139 * tunnel mode and we want to forward till the close. It's used both to forward
2140 * remaining data and to resync after end of body. It expects the msg_state to
2141 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
2142 * read more data, or 1 once we can go on with next request or end the stream.
2143 *
2144 * It is capable of compressing response data both in content-length mode and
2145 * in chunked mode. The state machines follows different flows depending on
2146 * whether content-length and chunked modes are used, since there are no
2147 * trailers in content-length :
2148 *
2149 * chk-mode cl-mode
2150 * ,----- BODY -----.
2151 * / \
2152 * V size > 0 V chk-mode
2153 * .--> SIZE -------------> DATA -------------> CRLF
2154 * | | size == 0 | last byte |
2155 * | v final crlf v inspected |
2156 * | TRAILERS -----------> DONE |
2157 * | |
2158 * `----------------------------------------------'
2159 *
2160 * Compression only happens in the DATA state, and must be flushed in final
2161 * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
2162 * is performed at once on final states for all bytes parsed, or when leaving
2163 * on missing data.
2164 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002165int http_response_forward_body(struct stream *s, struct channel *res, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02002166{
2167 struct session *sess = s->sess;
2168 struct http_txn *txn = s->txn;
2169 struct http_msg *msg = &s->txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02002170 struct htx *htx;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002171 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002172
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002173 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002174
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002175 htx = htxbuf(&res->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002176
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002177 if (htx->flags & HTX_FL_PARSING_ERROR)
2178 goto return_bad_res;
2179 if (htx->flags & HTX_FL_PROCESSING_ERROR)
2180 goto return_int_err;
2181
Christopher Faulete0768eb2018-10-03 16:38:02 +02002182 if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
Christopher Fauletf2824e62018-10-01 12:12:37 +02002183 ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002184 /* Output closed while we were sending data. We must abort and
2185 * wake the other side up.
2186 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002187 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002188 http_end_response(s);
2189 http_end_request(s);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002190 DBG_TRACE_DEVEL("leaving on error",
2191 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002192 return 1;
2193 }
2194
Christopher Faulet9768c262018-10-22 09:34:31 +02002195 if (msg->msg_state == HTTP_MSG_BODY)
2196 msg->msg_state = HTTP_MSG_DATA;
2197
Christopher Faulete0768eb2018-10-03 16:38:02 +02002198 /* in most states, we should abort in case of early close */
2199 channel_auto_close(res);
2200
Christopher Faulete0768eb2018-10-03 16:38:02 +02002201 if (res->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01002202 if (res->to_forward == CHN_INFINITE_FORWARD) {
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002203 if (res->flags & CF_EOI)
2204 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01002205 }
2206 else {
2207 /* We can't process the buffer's contents yet */
2208 res->flags |= CF_WAKE_WRITE;
2209 goto missing_data_or_waiting;
2210 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002211 }
2212
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002213 if (msg->msg_state >= HTTP_MSG_ENDING)
2214 goto ending;
2215
Christopher Fauletc75668e2020-12-07 18:10:32 +01002216 if ((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) || txn->status == 101 ||
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002217 (!(msg->flags & HTTP_MSGF_XFER_LEN) && !HAS_RSP_DATA_FILTERS(s))) {
2218 msg->msg_state = HTTP_MSG_ENDING;
2219 goto ending;
2220 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002221
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002222 /* Forward input data. We get it by removing all outgoing data not
2223 * forwarded yet from HTX data size. If there are some data filters, we
2224 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02002225 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002226 if (HAS_RSP_DATA_FILTERS(s)) {
2227 ret = flt_http_payload(s, msg, htx->data);
2228 if (ret < 0)
2229 goto return_bad_res;
Christopher Faulet421e7692019-06-13 11:16:45 +02002230 c_adv(res, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002231 }
2232 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02002233 c_adv(res, htx->data - co_data(res));
Christopher Faulet66af0b22019-03-22 14:54:52 +01002234 if (msg->flags & HTTP_MSGF_XFER_LEN)
2235 channel_htx_forward_forever(res, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002236 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002237
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002238 if (htx->data != co_data(res))
2239 goto missing_data_or_waiting;
2240
2241 if (!(msg->flags & HTTP_MSGF_XFER_LEN) && res->flags & CF_SHUTR) {
2242 msg->msg_state = HTTP_MSG_ENDING;
2243 goto ending;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002244 }
2245
Christopher Faulet9768c262018-10-22 09:34:31 +02002246 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002247 * in HTTP_MSG_ENDING state. Then if all data was marked to be
2248 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02002249 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01002250 if (!(htx->flags & HTX_FL_EOM))
Christopher Faulet9768c262018-10-22 09:34:31 +02002251 goto missing_data_or_waiting;
2252
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002253 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02002254
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002255 ending:
Christopher Faulet2151cdd2020-07-22 16:34:59 +02002256 res->flags &= ~CF_EXPECT_MORE; /* no more data are expected */
2257
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002258 /* other states, ENDING...TUNNEL */
2259 if (msg->msg_state >= HTTP_MSG_DONE)
2260 goto done;
Christopher Faulet9768c262018-10-22 09:34:31 +02002261
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002262 if (HAS_RSP_DATA_FILTERS(s)) {
2263 ret = flt_http_end(s, msg);
2264 if (ret <= 0) {
2265 if (!ret)
2266 goto missing_data_or_waiting;
2267 goto return_bad_res;
2268 }
2269 }
2270
Christopher Fauletc75668e2020-12-07 18:10:32 +01002271 if ((txn->meth == HTTP_METH_CONNECT && txn->status >= 200 && txn->status < 300) || txn->status == 101 ||
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002272 !(msg->flags & HTTP_MSGF_XFER_LEN)) {
2273 msg->msg_state = HTTP_MSG_TUNNEL;
2274 goto ending;
2275 }
2276 else {
2277 msg->msg_state = HTTP_MSG_DONE;
2278 res->to_forward = 0;
2279 }
2280
2281 done:
2282
2283 channel_dont_close(res);
2284
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002285 http_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002286 if (!(res->analysers & an_bit)) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002287 http_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002288 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2289 if (res->flags & CF_SHUTW) {
2290 /* response errors are most likely due to the
2291 * client aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002292 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002293 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002294 goto return_bad_res;
2295 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002296 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002297 return 1;
2298 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002299 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
2300 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002301 return 0;
2302
2303 missing_data_or_waiting:
2304 if (res->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01002305 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002306
2307 /* stop waiting for data if the input is closed before the end. If the
2308 * client side was already closed, it means that the client has aborted,
2309 * so we don't want to count this as a server abort. Otherwise it's a
2310 * server abort.
2311 */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002312 if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002313 if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002314 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002315 /* If we have some pending data, we continue the processing */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002316 if (htx_is_empty(htx))
2317 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002318 }
2319
Christopher Faulete0768eb2018-10-03 16:38:02 +02002320 /* When TE: chunked is used, we need to get there again to parse
2321 * remaining chunks even if the server has closed, so we don't want to
Christopher Faulet9768c262018-10-22 09:34:31 +02002322 * set CF_DONTCLOSE. Similarly when there is a content-leng or if there
2323 * are filters registered on the stream, we don't want to forward a
2324 * close
Christopher Faulete0768eb2018-10-03 16:38:02 +02002325 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002326 if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002327 channel_dont_close(res);
2328
2329 /* We know that more data are expected, but we couldn't send more that
2330 * what we did. So we always set the CF_EXPECT_MORE flag so that the
2331 * system knows it must not set a PUSH on this first part. Interactive
2332 * modes are already handled by the stream sock layer. We must not do
2333 * this in content-length mode because it could present the MSG_MORE
2334 * flag with the last block of forwarded data, which would cause an
2335 * additional delay to be observed by the receiver.
2336 */
Christopher Faulet2151cdd2020-07-22 16:34:59 +02002337 if (HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002338 res->flags |= CF_EXPECT_MORE;
2339
2340 /* the stream handler will take care of timeouts and errors */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002341 DBG_TRACE_DEVEL("waiting for more data to forward",
2342 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002343 return 0;
2344
Christopher Faulet93e02d82019-03-08 14:18:50 +01002345 return_srv_abort:
Willy Tarreau4781b152021-04-06 13:53:36 +02002346 _HA_ATOMIC_INC(&sess->fe->fe_counters.srv_aborts);
2347 _HA_ATOMIC_INC(&s->be->be_counters.srv_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01002348 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002349 _HA_ATOMIC_INC(&sess->listener->counters->srv_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002350 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002351 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.srv_aborts);
Willy Tarreau826f3ab2021-02-10 12:07:15 +01002352 stream_inc_http_fail_ctr(s);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002353 if (!(s->flags & SF_ERR_MASK))
2354 s->flags |= SF_ERR_SRVCL;
2355 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002356
Christopher Faulet93e02d82019-03-08 14:18:50 +01002357 return_cli_abort:
Willy Tarreau4781b152021-04-06 13:53:36 +02002358 _HA_ATOMIC_INC(&sess->fe->fe_counters.cli_aborts);
2359 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01002360 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002361 _HA_ATOMIC_INC(&sess->listener->counters->cli_aborts);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002362 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002363 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002364 if (!(s->flags & SF_ERR_MASK))
2365 s->flags |= SF_ERR_CLICL;
2366 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002367
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002368 return_int_err:
Willy Tarreau4781b152021-04-06 13:53:36 +02002369 _HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
2370 _HA_ATOMIC_INC(&s->be->be_counters.internal_errors);
William Lallemand36119de2021-03-08 15:26:48 +01002371 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02002372 _HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002373 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02002374 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.internal_errors);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002375 if (!(s->flags & SF_ERR_MASK))
2376 s->flags |= SF_ERR_INTERNAL;
2377 goto return_error;
2378
Christopher Faulet93e02d82019-03-08 14:18:50 +01002379 return_bad_res:
Willy Tarreau4781b152021-04-06 13:53:36 +02002380 _HA_ATOMIC_INC(&s->be->be_counters.failed_resp);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002381 if (objt_server(s->target)) {
Willy Tarreau4781b152021-04-06 13:53:36 +02002382 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.failed_resp);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002383 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2384 }
Willy Tarreau826f3ab2021-02-10 12:07:15 +01002385 stream_inc_http_fail_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002386 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002387 s->flags |= SF_ERR_SRVCL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002388 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002389
Christopher Faulet93e02d82019-03-08 14:18:50 +01002390 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002391 /* don't send any error message as we're in the body */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002392 http_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002393 if (!(s->flags & SF_FINST_MASK))
2394 s->flags |= SF_FINST_D;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002395 DBG_TRACE_DEVEL("leaving on error",
2396 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002397 return 0;
2398}
2399
Christopher Fauletf2824e62018-10-01 12:12:37 +02002400/* Perform an HTTP redirect based on the information in <rule>. The function
Christopher Faulet99daf282018-11-28 22:58:13 +01002401 * returns zero on success, or zero in case of a, irrecoverable error such
Christopher Fauletf2824e62018-10-01 12:12:37 +02002402 * as too large a request to build a valid response.
2403 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002404int http_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
Christopher Fauletf2824e62018-10-01 12:12:37 +02002405{
Christopher Faulet99daf282018-11-28 22:58:13 +01002406 struct channel *req = &s->req;
2407 struct channel *res = &s->res;
2408 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01002409 struct htx_sl *sl;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002410 struct buffer *chunk;
Christopher Faulet99daf282018-11-28 22:58:13 +01002411 struct ist status, reason, location;
2412 unsigned int flags;
Christopher Faulet08e66462019-05-23 16:44:59 +02002413 int close = 0; /* Try to keep the connection alive byt default */
Christopher Fauletf2824e62018-10-01 12:12:37 +02002414
2415 chunk = alloc_trash_chunk();
Christopher Fauletb8a53712019-12-16 11:29:38 +01002416 if (!chunk) {
2417 if (!(s->flags & SF_ERR_MASK))
2418 s->flags |= SF_ERR_RESOURCE;
Christopher Faulet99daf282018-11-28 22:58:13 +01002419 goto fail;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002420 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002421
Christopher Faulet99daf282018-11-28 22:58:13 +01002422 /*
2423 * Create the location
2424 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002425 htx = htxbuf(&req->buf);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002426 switch(rule->type) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002427 case REDIRECT_TYPE_SCHEME: {
2428 struct http_hdr_ctx ctx;
2429 struct ist path, host;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002430
Christopher Faulet99daf282018-11-28 22:58:13 +01002431 host = ist("");
2432 ctx.blk = NULL;
2433 if (http_find_header(htx, ist("Host"), &ctx, 0))
2434 host = ctx.value;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002435
Christopher Faulet297fbb42019-05-13 14:41:27 +02002436 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002437 path = http_get_path(htx_sl_req_uri(sl));
2438 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002439 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002440 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2441 int qs = 0;
2442 while (qs < path.len) {
2443 if (*(path.ptr + qs) == '?') {
2444 path.len = qs;
2445 break;
2446 }
2447 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002448 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002449 }
2450 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002451 else
2452 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002453
Christopher Faulet99daf282018-11-28 22:58:13 +01002454 if (rule->rdr_str) { /* this is an old "redirect" rule */
2455 /* add scheme */
2456 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2457 goto fail;
2458 }
2459 else {
2460 /* add scheme with executing log format */
2461 chunk->data += build_logline(s, chunk->area + chunk->data,
2462 chunk->size - chunk->data,
2463 &rule->rdr_fmt);
2464 }
2465 /* add "://" + host + path */
2466 if (!chunk_memcat(chunk, "://", 3) ||
2467 !chunk_memcat(chunk, host.ptr, host.len) ||
2468 !chunk_memcat(chunk, path.ptr, path.len))
2469 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002470
Christopher Faulet99daf282018-11-28 22:58:13 +01002471 /* append a slash at the end of the location if needed and missing */
2472 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2473 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2474 if (chunk->data + 1 >= chunk->size)
2475 goto fail;
2476 chunk->area[chunk->data++] = '/';
2477 }
2478 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002479 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002480
Christopher Faulet99daf282018-11-28 22:58:13 +01002481 case REDIRECT_TYPE_PREFIX: {
2482 struct ist path;
2483
Christopher Faulet297fbb42019-05-13 14:41:27 +02002484 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002485 path = http_get_path(htx_sl_req_uri(sl));
2486 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002487 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002488 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2489 int qs = 0;
2490 while (qs < path.len) {
2491 if (*(path.ptr + qs) == '?') {
2492 path.len = qs;
2493 break;
2494 }
2495 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002496 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002497 }
2498 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002499 else
2500 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002501
Christopher Faulet99daf282018-11-28 22:58:13 +01002502 if (rule->rdr_str) { /* this is an old "redirect" rule */
2503 /* add prefix. Note that if prefix == "/", we don't want to
2504 * add anything, otherwise it makes it hard for the user to
2505 * configure a self-redirection.
2506 */
2507 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
2508 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2509 goto fail;
2510 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002511 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002512 else {
2513 /* add prefix with executing log format */
2514 chunk->data += build_logline(s, chunk->area + chunk->data,
2515 chunk->size - chunk->data,
2516 &rule->rdr_fmt);
2517 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002518
Christopher Faulet99daf282018-11-28 22:58:13 +01002519 /* add path */
2520 if (!chunk_memcat(chunk, path.ptr, path.len))
2521 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002522
Christopher Faulet99daf282018-11-28 22:58:13 +01002523 /* append a slash at the end of the location if needed and missing */
2524 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2525 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2526 if (chunk->data + 1 >= chunk->size)
2527 goto fail;
2528 chunk->area[chunk->data++] = '/';
2529 }
2530 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002531 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002532 case REDIRECT_TYPE_LOCATION:
2533 default:
2534 if (rule->rdr_str) { /* this is an old "redirect" rule */
2535 /* add location */
2536 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2537 goto fail;
2538 }
2539 else {
2540 /* add location with executing log format */
2541 chunk->data += build_logline(s, chunk->area + chunk->data,
2542 chunk->size - chunk->data,
2543 &rule->rdr_fmt);
2544 }
2545 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002546 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002547 location = ist2(chunk->area, chunk->data);
2548
2549 /*
2550 * Create the 30x response
2551 */
2552 switch (rule->code) {
2553 case 308:
2554 status = ist("308");
2555 reason = ist("Permanent Redirect");
2556 break;
2557 case 307:
2558 status = ist("307");
2559 reason = ist("Temporary Redirect");
2560 break;
2561 case 303:
2562 status = ist("303");
2563 reason = ist("See Other");
2564 break;
2565 case 301:
2566 status = ist("301");
2567 reason = ist("Moved Permanently");
2568 break;
2569 case 302:
2570 default:
2571 status = ist("302");
2572 reason = ist("Found");
2573 break;
2574 }
2575
Christopher Faulet08e66462019-05-23 16:44:59 +02002576 if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE)
2577 close = 1;
2578
Christopher Faulet99daf282018-11-28 22:58:13 +01002579 htx = htx_from_buf(&res->buf);
Kevin Zhu96b36392020-01-07 09:42:55 +01002580 /* Trim any possible response */
2581 channel_htx_truncate(&s->res, htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002582 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2583 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason);
2584 if (!sl)
2585 goto fail;
2586 sl->info.res.status = rule->code;
2587 s->txn->status = rule->code;
2588
Christopher Faulet08e66462019-05-23 16:44:59 +02002589 if (close && !htx_add_header(htx, ist("Connection"), ist("close")))
2590 goto fail;
2591
2592 if (!htx_add_header(htx, ist("Content-length"), ist("0")) ||
Christopher Faulet99daf282018-11-28 22:58:13 +01002593 !htx_add_header(htx, ist("Location"), location))
2594 goto fail;
2595
2596 if (rule->code == 302 || rule->code == 303 || rule->code == 307) {
2597 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")))
2598 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002599 }
2600
2601 if (rule->cookie_len) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002602 if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len)))
2603 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002604 }
2605
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01002606 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet99daf282018-11-28 22:58:13 +01002607 goto fail;
2608
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01002609 htx->flags |= HTX_FL_EOM;
Kevin Zhu96b36392020-01-07 09:42:55 +01002610 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01002611 if (!http_forward_proxy_resp(s, 1))
2612 goto fail;
Christopher Faulet99daf282018-11-28 22:58:13 +01002613
Christopher Faulet60b33a52020-01-28 09:18:10 +01002614 if (rule->flags & REDIRECT_FLAG_FROM_REQ) {
2615 /* let's log the request time */
2616 s->logs.tv_request = now;
Christopher Faulet91322272021-10-04 14:16:46 +02002617 req->analysers &= AN_REQ_FLT_END;
Christopher Faulet99daf282018-11-28 22:58:13 +01002618
Christopher Faulet60b33a52020-01-28 09:18:10 +01002619 if (s->sess->fe == s->be) /* report it if the request was intercepted by the frontend */
Willy Tarreau4781b152021-04-06 13:53:36 +02002620 _HA_ATOMIC_INC(&s->sess->fe->fe_counters.intercepted_req);
Christopher Faulet60b33a52020-01-28 09:18:10 +01002621 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002622
2623 if (!(s->flags & SF_ERR_MASK))
2624 s->flags |= SF_ERR_LOCAL;
2625 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet60b33a52020-01-28 09:18:10 +01002626 s->flags |= ((rule->flags & REDIRECT_FLAG_FROM_REQ) ? SF_FINST_R : SF_FINST_H);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002627
Christopher Faulet99daf282018-11-28 22:58:13 +01002628 free_trash_chunk(chunk);
2629 return 1;
2630
2631 fail:
2632 /* If an error occurred, remove the incomplete HTTP response from the
2633 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002634 channel_htx_truncate(res, htxbuf(&res->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02002635 free_trash_chunk(chunk);
Christopher Faulet99daf282018-11-28 22:58:13 +01002636 return 0;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002637}
2638
Christopher Faulet79507152022-05-16 11:43:10 +02002639/* This function filters the request header names to only allow [0-9a-zA-Z-]
2640 * characters. Depending on the proxy configuration, headers with a name not
2641 * matching this charset are removed or the request is rejected with a
2642 * 403-Forbidden response if such name are found. It returns HTTP_RULE_RES_CONT
2643 * to continue the request processing or HTTP_RULE_RES_DENY if the request is
2644 * rejected.
2645 */
2646static enum rule_result http_req_restrict_header_names(struct stream *s, struct htx *htx, struct proxy *px)
2647{
2648 struct htx_blk *blk;
2649 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
2650
2651 blk = htx_get_first_blk(htx);
2652 while (blk) {
2653 enum htx_blk_type type = htx_get_blk_type(blk);
2654
2655 if (type == HTX_BLK_HDR) {
2656 struct ist n = htx_get_blk_name(htx, blk);
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002657 int i, end = istlen(n);
Christopher Faulet79507152022-05-16 11:43:10 +02002658
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002659 for (i = 0; i < end; i++) {
Christopher Faulet79507152022-05-16 11:43:10 +02002660 if (!isalnum((unsigned char)n.ptr[i]) && n.ptr[i] != '-') {
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002661 break;
Christopher Faulet79507152022-05-16 11:43:10 +02002662 }
2663 }
Mateusz Malek4360b9a2022-08-17 14:22:09 +02002664
2665 if (i < end) {
2666 /* Disallowed character found - block the request or remove the header */
2667 if (px->options2 & PR_O2_RSTRICT_REQ_HDR_NAMES_BLK)
2668 goto block;
2669 blk = htx_remove_blk(htx, blk);
2670 continue;
2671 }
Christopher Faulet79507152022-05-16 11:43:10 +02002672 }
2673 if (type == HTX_BLK_EOH)
2674 break;
2675
2676 blk = htx_get_next_blk(htx, blk);
2677 }
2678 out:
2679 return rule_ret;
2680 block:
2681 /* Block the request returning a 403-Forbidden response */
2682 s->txn->status = 403;
2683 rule_ret = HTTP_RULE_RES_DENY;
2684 goto out;
2685}
2686
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002687/* Replace all headers matching the name <name>. The header value is replaced if
2688 * it matches the regex <re>. <str> is used for the replacement. If <full> is
2689 * set to 1, the full-line is matched and replaced. Otherwise, comma-separated
2690 * values are evaluated one by one. It returns 0 on success and -1 on error.
2691 */
2692int http_replace_hdrs(struct stream* s, struct htx *htx, struct ist name,
2693 const char *str, struct my_regex *re, int full)
Christopher Faulet72333522018-10-24 11:25:02 +02002694{
2695 struct http_hdr_ctx ctx;
2696 struct buffer *output = get_trash_chunk();
2697
Christopher Faulet72333522018-10-24 11:25:02 +02002698 ctx.blk = NULL;
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002699 while (http_find_header(htx, name, &ctx, full)) {
Christopher Faulet72333522018-10-24 11:25:02 +02002700 if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0))
2701 continue;
2702
2703 output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch);
2704 if (output->data == -1)
2705 return -1;
2706 if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data)))
2707 return -1;
2708 }
2709 return 0;
2710}
2711
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002712/* This function executes one of the set-{method,path,query,uri} actions. It
2713 * takes the string from the variable 'replace' with length 'len', then modifies
2714 * the relevant part of the request line accordingly. Then it updates various
2715 * pointers to the next elements which were moved, and the total buffer length.
2716 * It finds the action to be performed in p[2], previously filled by function
2717 * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
2718 * error, though this can be revisited when this code is finally exploited.
2719 *
2720 * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
Christopher Faulet312294f2020-09-02 17:17:44 +02002721 * query string, 3 to replace uri or 4 to replace the path+query.
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002722 *
2723 * In query string case, the mark question '?' must be set at the start of the
2724 * string by the caller, event if the replacement query string is empty.
2725 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002726int http_req_replace_stline(int action, const char *replace, int len,
2727 struct proxy *px, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002728{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002729 struct htx *htx = htxbuf(&s->req.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002730
2731 switch (action) {
2732 case 0: // method
2733 if (!http_replace_req_meth(htx, ist2(replace, len)))
2734 return -1;
2735 break;
2736
2737 case 1: // path
Christopher Fauletb8ce5052020-08-31 16:11:57 +02002738 if (!http_replace_req_path(htx, ist2(replace, len), 0))
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002739 return -1;
2740 break;
2741
2742 case 2: // query
2743 if (!http_replace_req_query(htx, ist2(replace, len)))
2744 return -1;
2745 break;
2746
2747 case 3: // uri
2748 if (!http_replace_req_uri(htx, ist2(replace, len)))
2749 return -1;
2750 break;
2751
Christopher Faulet312294f2020-09-02 17:17:44 +02002752 case 4: // path + query
2753 if (!http_replace_req_path(htx, ist2(replace, len), 1))
2754 return -1;
2755 break;
2756
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002757 default:
2758 return -1;
2759 }
2760 return 0;
2761}
2762
2763/* This function replace the HTTP status code and the associated message. The
Christopher Faulete00d06c2019-12-16 17:18:42 +01002764 * variable <status> contains the new status code. This function never fails. It
2765 * returns 0 in case of success, -1 in case of internal error.
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002766 */
Christopher Faulet96bff762019-12-17 13:46:18 +01002767int http_res_set_status(unsigned int status, struct ist reason, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002768{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002769 struct htx *htx = htxbuf(&s->res.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002770 char *res;
2771
2772 chunk_reset(&trash);
2773 res = ultoa_o(status, trash.area, trash.size);
2774 trash.data = res - trash.area;
2775
2776 /* Do we have a custom reason format string? */
Tim Duesterhuse296d3e2020-03-05 17:56:31 +01002777 if (!isttest(reason)) {
Christopher Faulet96bff762019-12-17 13:46:18 +01002778 const char *str = http_get_reason(status);
Tim Duesterhusdcf753a2021-03-04 17:31:47 +01002779 reason = ist(str);
Christopher Faulet96bff762019-12-17 13:46:18 +01002780 }
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002781
Christopher Fauletbde2c4c2020-08-31 16:43:34 +02002782 if (!http_replace_res_status(htx, ist2(trash.area, trash.data), reason))
Christopher Faulete00d06c2019-12-16 17:18:42 +01002783 return -1;
Willy Tarreaubed299a2023-01-10 14:50:44 +01002784 s->txn->status = status;
Christopher Faulete00d06c2019-12-16 17:18:42 +01002785 return 0;
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002786}
2787
Christopher Faulet3e964192018-10-24 11:39:23 +02002788/* Executes the http-request rules <rules> for stream <s>, proxy <px> and
2789 * transaction <txn>. Returns the verdict of the first rule that prevents
2790 * further processing of the request (auth, deny, ...), and defaults to
2791 * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
2792 * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
2793 * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
2794 * and a deny/tarpit rule is matched, it will be filled with this rule's deny
2795 * status.
2796 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002797static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules,
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002798 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002799{
2800 struct session *sess = strm_sess(s);
2801 struct http_txn *txn = s->txn;
Christopher Faulet3e964192018-10-24 11:39:23 +02002802 struct act_rule *rule;
Christopher Faulet3e964192018-10-24 11:39:23 +02002803 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002804 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002805
Christopher Faulet3e964192018-10-24 11:39:23 +02002806 /* If "the current_rule_list" match the executed rule list, we are in
2807 * resume condition. If a resume is needed it is always in the action
2808 * and never in the ACL or converters. In this case, we initialise the
2809 * current rule, and go to the action execution point.
2810 */
2811 if (s->current_rule) {
2812 rule = s->current_rule;
2813 s->current_rule = NULL;
2814 if (s->current_rule_list == rules)
2815 goto resume_execution;
2816 }
2817 s->current_rule_list = rules;
2818
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002819 /* start the ruleset evaluation in strict mode */
2820 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002821
Christopher Faulet3e964192018-10-24 11:39:23 +02002822 list_for_each_entry(rule, rules, list) {
2823 /* check optional condition */
2824 if (rule->cond) {
2825 int ret;
2826
2827 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
2828 ret = acl_pass(ret);
2829
2830 if (rule->cond->pol == ACL_COND_UNLESS)
2831 ret = !ret;
2832
2833 if (!ret) /* condition not matched */
2834 continue;
2835 }
2836
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002837 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02002838 resume_execution:
Amaury Denoyelle03517732021-05-07 14:25:01 +02002839 if (rule->kw->flags & KWF_EXPERIMENTAL)
2840 mark_tainted(TAINTED_ACTION_EXP_EXECUTED);
2841
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002842 /* Always call the action function if defined */
2843 if (rule->action_ptr) {
2844 if ((s->req.flags & CF_READ_ERROR) ||
2845 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
2846 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002847 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002848
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002849 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002850 case ACT_RET_CONT:
2851 break;
2852 case ACT_RET_STOP:
2853 rule_ret = HTTP_RULE_RES_STOP;
2854 goto end;
2855 case ACT_RET_YIELD:
2856 s->current_rule = rule;
2857 rule_ret = HTTP_RULE_RES_YIELD;
2858 goto end;
2859 case ACT_RET_ERR:
2860 rule_ret = HTTP_RULE_RES_ERROR;
2861 goto end;
2862 case ACT_RET_DONE:
2863 rule_ret = HTTP_RULE_RES_DONE;
2864 goto end;
2865 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002866 if (txn->status == -1)
2867 txn->status = 403;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002868 rule_ret = HTTP_RULE_RES_DENY;
2869 goto end;
2870 case ACT_RET_ABRT:
2871 rule_ret = HTTP_RULE_RES_ABRT;
2872 goto end;
2873 case ACT_RET_INV:
2874 rule_ret = HTTP_RULE_RES_BADREQ;
2875 goto end;
2876 }
2877 continue; /* eval the next rule */
2878 }
2879
2880 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02002881 switch (rule->action) {
2882 case ACT_ACTION_ALLOW:
2883 rule_ret = HTTP_RULE_RES_STOP;
2884 goto end;
2885
2886 case ACT_ACTION_DENY:
Christopher Faulet5cb513a2020-05-13 17:56:56 +02002887 txn->status = rule->arg.http_reply->status;
2888 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3e964192018-10-24 11:39:23 +02002889 rule_ret = HTTP_RULE_RES_DENY;
2890 goto end;
2891
2892 case ACT_HTTP_REQ_TARPIT:
2893 txn->flags |= TX_CLTARPIT;
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
Christopher Faulet3e964192018-10-24 11:39:23 +02002899 case ACT_HTTP_REDIR:
Christopher Faulet90d22a82020-03-06 11:18:39 +01002900 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002901 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01002902 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02002903 goto end;
2904
2905 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01002906 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002907 break;
2908
2909 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01002910 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002911 break;
2912
2913 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01002914 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002915 break;
2916
2917 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01002918 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002919 break;
2920
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002921 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02002922 default:
2923 break;
2924 }
2925 }
2926
2927 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002928 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01002929 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002930 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002931
Christopher Faulet3e964192018-10-24 11:39:23 +02002932 /* we reached the end of the rules, nothing to report */
2933 return rule_ret;
2934}
2935
2936/* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
2937 * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
2938 * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
2939 * is returned, the process can continue the evaluation of next rule list. If
2940 * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
2941 * is returned, it means the operation could not be processed and a server error
Christopher Fauleta53abad2020-05-13 08:12:22 +02002942 * must be returned. If *YIELD is returned, the caller must call again the
2943 * function with the same context.
Christopher Faulet3e964192018-10-24 11:39:23 +02002944 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002945static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules,
2946 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002947{
2948 struct session *sess = strm_sess(s);
2949 struct http_txn *txn = s->txn;
Christopher Faulet3e964192018-10-24 11:39:23 +02002950 struct act_rule *rule;
Christopher Faulet3e964192018-10-24 11:39:23 +02002951 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002952 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002953
Christopher Faulet3e964192018-10-24 11:39:23 +02002954 /* If "the current_rule_list" match the executed rule list, we are in
2955 * resume condition. If a resume is needed it is always in the action
2956 * and never in the ACL or converters. In this case, we initialise the
2957 * current rule, and go to the action execution point.
2958 */
2959 if (s->current_rule) {
2960 rule = s->current_rule;
2961 s->current_rule = NULL;
2962 if (s->current_rule_list == rules)
2963 goto resume_execution;
2964 }
2965 s->current_rule_list = rules;
2966
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002967 /* start the ruleset evaluation in strict mode */
2968 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002969
Christopher Faulet3e964192018-10-24 11:39:23 +02002970 list_for_each_entry(rule, rules, list) {
2971 /* check optional condition */
2972 if (rule->cond) {
2973 int ret;
2974
2975 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
2976 ret = acl_pass(ret);
2977
2978 if (rule->cond->pol == ACL_COND_UNLESS)
2979 ret = !ret;
2980
2981 if (!ret) /* condition not matched */
2982 continue;
2983 }
2984
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002985 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02002986resume_execution:
Amaury Denoyelle03517732021-05-07 14:25:01 +02002987 if (rule->kw->flags & KWF_EXPERIMENTAL)
2988 mark_tainted(TAINTED_ACTION_EXP_EXECUTED);
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002989
2990 /* Always call the action function if defined */
2991 if (rule->action_ptr) {
2992 if ((s->req.flags & CF_READ_ERROR) ||
2993 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
2994 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002995 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002996
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002997 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002998 case ACT_RET_CONT:
2999 break;
3000 case ACT_RET_STOP:
3001 rule_ret = HTTP_RULE_RES_STOP;
3002 goto end;
3003 case ACT_RET_YIELD:
3004 s->current_rule = rule;
3005 rule_ret = HTTP_RULE_RES_YIELD;
3006 goto end;
3007 case ACT_RET_ERR:
3008 rule_ret = HTTP_RULE_RES_ERROR;
3009 goto end;
3010 case ACT_RET_DONE:
3011 rule_ret = HTTP_RULE_RES_DONE;
3012 goto end;
3013 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01003014 if (txn->status == -1)
3015 txn->status = 502;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003016 rule_ret = HTTP_RULE_RES_DENY;
3017 goto end;
3018 case ACT_RET_ABRT:
3019 rule_ret = HTTP_RULE_RES_ABRT;
3020 goto end;
3021 case ACT_RET_INV:
3022 rule_ret = HTTP_RULE_RES_BADREQ;
3023 goto end;
3024 }
3025 continue; /* eval the next rule */
3026 }
3027
3028 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02003029 switch (rule->action) {
3030 case ACT_ACTION_ALLOW:
3031 rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
3032 goto end;
3033
3034 case ACT_ACTION_DENY:
Christopher Faulet5cb513a2020-05-13 17:56:56 +02003035 txn->status = rule->arg.http_reply->status;
3036 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003037 rule_ret = HTTP_RULE_RES_DENY;
Christopher Faulet3e964192018-10-24 11:39:23 +02003038 goto end;
3039
3040 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01003041 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003042 break;
3043
3044 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01003045 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003046 break;
3047
3048 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01003049 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003050 break;
3051
3052 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01003053 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003054 break;
3055
Christopher Faulet3e964192018-10-24 11:39:23 +02003056 case ACT_HTTP_REDIR:
Christopher Faulet49c2a702020-03-06 15:44:37 +01003057 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003058 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003059 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02003060 goto end;
3061
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003062 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003063 default:
3064 break;
3065 }
3066 }
3067
3068 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003069 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01003070 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003071 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01003072
Christopher Faulet3e964192018-10-24 11:39:23 +02003073 /* we reached the end of the rules, nothing to report */
3074 return rule_ret;
3075}
3076
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003077/* Executes backend and frontend http-after-response rules for the stream <s>,
3078 * in that order. it return 1 on success and 0 on error. It is the caller
3079 * responsibility to catch error or ignore it. If it catches it, this function
3080 * may be called a second time, for the internal error.
3081 */
3082int http_eval_after_res_rules(struct stream *s)
3083{
3084 struct session *sess = s->sess;
3085 enum rule_result ret = HTTP_RULE_RES_CONT;
3086
Christopher Faulet507479b2020-05-15 12:29:46 +02003087 /* Eval after-response ruleset only if the reply is not const */
3088 if (s->txn->flags & TX_CONST_REPLY)
3089 goto end;
3090
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003091 /* prune the request variables if not already done and swap to the response variables. */
3092 if (s->vars_reqres.scope != SCOPE_RES) {
3093 if (!LIST_ISEMPTY(&s->vars_reqres.head))
3094 vars_prune(&s->vars_reqres, s->sess, s);
3095 vars_init(&s->vars_reqres, SCOPE_RES);
3096 }
3097
3098 ret = http_res_get_intercept_rule(s->be, &s->be->http_after_res_rules, s);
Christopher Fauletf5db0fc2021-11-09 17:48:39 +01003099 if ((ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) && sess->fe != s->be)
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003100 ret = http_res_get_intercept_rule(sess->fe, &sess->fe->http_after_res_rules, s);
3101
Christopher Faulet507479b2020-05-15 12:29:46 +02003102 end:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003103 /* All other codes than CONTINUE, STOP or DONE are forbidden */
3104 return (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP || ret == HTTP_RULE_RES_DONE);
3105}
3106
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003107/*
3108 * Manage client-side cookie. It can impact performance by about 2% so it is
3109 * desirable to call it only when needed. This code is quite complex because
3110 * of the multiple very crappy and ambiguous syntaxes we have to support. it
3111 * highly recommended not to touch this part without a good reason !
3112 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003113static void http_manage_client_side_cookies(struct stream *s, struct channel *req)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003114{
3115 struct session *sess = s->sess;
3116 struct http_txn *txn = s->txn;
3117 struct htx *htx;
3118 struct http_hdr_ctx ctx;
3119 char *hdr_beg, *hdr_end, *del_from;
3120 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
3121 int preserve_hdr;
3122
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003123 htx = htxbuf(&req->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003124 ctx.blk = NULL;
3125 while (http_find_header(htx, ist("Cookie"), &ctx, 1)) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003126 int is_first = 1;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003127 del_from = NULL; /* nothing to be deleted */
3128 preserve_hdr = 0; /* assume we may kill the whole header */
3129
3130 /* Now look for cookies. Conforming to RFC2109, we have to support
3131 * attributes whose name begin with a '$', and associate them with
3132 * the right cookie, if we want to delete this cookie.
3133 * So there are 3 cases for each cookie read :
3134 * 1) it's a special attribute, beginning with a '$' : ignore it.
3135 * 2) it's a server id cookie that we *MAY* want to delete : save
3136 * some pointers on it (last semi-colon, beginning of cookie...)
3137 * 3) it's an application cookie : we *MAY* have to delete a previous
3138 * "special" cookie.
3139 * At the end of loop, if a "special" cookie remains, we may have to
3140 * remove it. If no application cookie persists in the header, we
3141 * *MUST* delete it.
3142 *
3143 * Note: RFC2965 is unclear about the processing of spaces around
3144 * the equal sign in the ATTR=VALUE form. A careful inspection of
3145 * the RFC explicitly allows spaces before it, and not within the
3146 * tokens (attrs or values). An inspection of RFC2109 allows that
3147 * too but section 10.1.3 lets one think that spaces may be allowed
3148 * after the equal sign too, resulting in some (rare) buggy
3149 * implementations trying to do that. So let's do what servers do.
3150 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
3151 * allowed quoted strings in values, with any possible character
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003152 * after a backslash, including control chars and delimiters, which
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003153 * causes parsing to become ambiguous. Browsers also allow spaces
3154 * within values even without quotes.
3155 *
3156 * We have to keep multiple pointers in order to support cookie
3157 * removal at the beginning, middle or end of header without
3158 * corrupting the header. All of these headers are valid :
3159 *
3160 * hdr_beg hdr_end
3161 * | |
3162 * v |
3163 * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 |
3164 * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v
3165 * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3
3166 * | | | | | | |
3167 * | | | | | | |
3168 * | | | | | | +--> next
3169 * | | | | | +----> val_end
3170 * | | | | +-----------> val_beg
3171 * | | | +--------------> equal
3172 * | | +----------------> att_end
3173 * | +---------------------> att_beg
3174 * +--------------------------> prev
3175 *
3176 */
3177 hdr_beg = ctx.value.ptr;
3178 hdr_end = hdr_beg + ctx.value.len;
3179 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3180 /* Iterate through all cookies on this line */
3181
3182 /* find att_beg */
3183 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003184 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003185 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003186 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003187
3188 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3189 att_beg++;
3190
3191 /* find att_end : this is the first character after the last non
3192 * space before the equal. It may be equal to hdr_end.
3193 */
3194 equal = att_end = att_beg;
3195 while (equal < hdr_end) {
3196 if (*equal == '=' || *equal == ',' || *equal == ';')
3197 break;
3198 if (HTTP_IS_SPHT(*equal++))
3199 continue;
3200 att_end = equal;
3201 }
3202
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003203 /* here, <equal> points to '=', a delimiter or the end. <att_end>
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003204 * is between <att_beg> and <equal>, both may be identical.
3205 */
3206 /* look for end of cookie if there is an equal sign */
3207 if (equal < hdr_end && *equal == '=') {
3208 /* look for the beginning of the value */
3209 val_beg = equal + 1;
3210 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3211 val_beg++;
3212
3213 /* find the end of the value, respecting quotes */
3214 next = http_find_cookie_value_end(val_beg, hdr_end);
3215
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003216 /* make val_end point to the first white space or delimiter after the value */
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003217 val_end = next;
3218 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3219 val_end--;
3220 }
3221 else
3222 val_beg = val_end = next = equal;
3223
3224 /* We have nothing to do with attributes beginning with
3225 * '$'. However, they will automatically be removed if a
3226 * header before them is removed, since they're supposed
3227 * to be linked together.
3228 */
3229 if (*att_beg == '$')
3230 continue;
3231
3232 /* Ignore cookies with no equal sign */
3233 if (equal == next) {
3234 /* This is not our cookie, so we must preserve it. But if we already
3235 * scheduled another cookie for removal, we cannot remove the
3236 * complete header, but we can remove the previous block itself.
3237 */
3238 preserve_hdr = 1;
3239 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003240 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003241 val_end += delta;
3242 next += delta;
3243 hdr_end += delta;
3244 prev = del_from;
3245 del_from = NULL;
3246 }
3247 continue;
3248 }
3249
3250 /* if there are spaces around the equal sign, we need to
3251 * strip them otherwise we'll get trouble for cookie captures,
3252 * or even for rewrites. Since this happens extremely rarely,
3253 * it does not hurt performance.
3254 */
3255 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3256 int stripped_before = 0;
3257 int stripped_after = 0;
3258
3259 if (att_end != equal) {
3260 memmove(att_end, equal, hdr_end - equal);
3261 stripped_before = (att_end - equal);
3262 equal += stripped_before;
3263 val_beg += stripped_before;
3264 }
3265
3266 if (val_beg > equal + 1) {
3267 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3268 stripped_after = (equal + 1) - val_beg;
3269 val_beg += stripped_after;
3270 stripped_before += stripped_after;
3271 }
3272
3273 val_end += stripped_before;
3274 next += stripped_before;
3275 hdr_end += stripped_before;
3276 }
3277 /* now everything is as on the diagram above */
3278
3279 /* First, let's see if we want to capture this cookie. We check
3280 * that we don't already have a client side cookie, because we
3281 * can only capture one. Also as an optimisation, we ignore
3282 * cookies shorter than the declared name.
3283 */
3284 if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
3285 (val_end - att_beg >= sess->fe->capture_namelen) &&
3286 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3287 int log_len = val_end - att_beg;
3288
3289 if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
3290 ha_alert("HTTP logging : out of memory.\n");
3291 } else {
3292 if (log_len > sess->fe->capture_len)
3293 log_len = sess->fe->capture_len;
3294 memcpy(txn->cli_cookie, att_beg, log_len);
3295 txn->cli_cookie[log_len] = 0;
3296 }
3297 }
3298
3299 /* Persistence cookies in passive, rewrite or insert mode have the
3300 * following form :
3301 *
3302 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
3303 *
3304 * For cookies in prefix mode, the form is :
3305 *
3306 * Cookie: NAME=SRV~VALUE
3307 */
3308 if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3309 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3310 struct server *srv = s->be->srv;
3311 char *delim;
3312
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003313 /* if we're in cookie prefix mode, we'll search the delimiter so that we
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003314 * have the server ID between val_beg and delim, and the original cookie between
3315 * delim+1 and val_end. Otherwise, delim==val_end :
3316 *
3317 * hdr_beg
3318 * |
3319 * v
3320 * NAME=SRV; # in all but prefix modes
3321 * NAME=SRV~OPAQUE ; # in prefix mode
3322 * || || | |+-> next
3323 * || || | +--> val_end
3324 * || || +---------> delim
3325 * || |+------------> val_beg
3326 * || +-------------> att_end = equal
3327 * |+-----------------> att_beg
3328 * +------------------> prev
3329 *
3330 */
3331 if (s->be->ck_opts & PR_CK_PFX) {
3332 for (delim = val_beg; delim < val_end; delim++)
3333 if (*delim == COOKIE_DELIM)
3334 break;
3335 }
3336 else {
3337 char *vbar1;
3338 delim = val_end;
3339 /* Now check if the cookie contains a date field, which would
3340 * appear after a vertical bar ('|') just after the server name
3341 * and before the delimiter.
3342 */
3343 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
3344 if (vbar1) {
3345 /* OK, so left of the bar is the server's cookie and
3346 * right is the last seen date. It is a base64 encoded
3347 * 30-bit value representing the UNIX date since the
3348 * epoch in 4-second quantities.
3349 */
3350 int val;
3351 delim = vbar1++;
3352 if (val_end - vbar1 >= 5) {
3353 val = b64tos30(vbar1);
3354 if (val > 0)
3355 txn->cookie_last_date = val << 2;
3356 }
3357 /* look for a second vertical bar */
3358 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
3359 if (vbar1 && (val_end - vbar1 > 5)) {
3360 val = b64tos30(vbar1 + 1);
3361 if (val > 0)
3362 txn->cookie_first_date = val << 2;
3363 }
3364 }
3365 }
3366
3367 /* if the cookie has an expiration date and the proxy wants to check
3368 * it, then we do that now. We first check if the cookie is too old,
3369 * then only if it has expired. We detect strict overflow because the
3370 * time resolution here is not great (4 seconds). Cookies with dates
3371 * in the future are ignored if their offset is beyond one day. This
3372 * allows an admin to fix timezone issues without expiring everyone
3373 * and at the same time avoids keeping unwanted side effects for too
3374 * long.
3375 */
3376 if (txn->cookie_first_date && s->be->cookie_maxlife &&
3377 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
3378 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
3379 txn->flags &= ~TX_CK_MASK;
3380 txn->flags |= TX_CK_OLD;
3381 delim = val_beg; // let's pretend we have not found the cookie
3382 txn->cookie_first_date = 0;
3383 txn->cookie_last_date = 0;
3384 }
3385 else if (txn->cookie_last_date && s->be->cookie_maxidle &&
3386 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
3387 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
3388 txn->flags &= ~TX_CK_MASK;
3389 txn->flags |= TX_CK_EXPIRED;
3390 delim = val_beg; // let's pretend we have not found the cookie
3391 txn->cookie_first_date = 0;
3392 txn->cookie_last_date = 0;
3393 }
3394
3395 /* Here, we'll look for the first running server which supports the cookie.
3396 * This allows to share a same cookie between several servers, for example
3397 * to dedicate backup servers to specific servers only.
3398 * However, to prevent clients from sticking to cookie-less backup server
3399 * when they have incidentely learned an empty cookie, we simply ignore
3400 * empty cookies and mark them as invalid.
3401 * The same behaviour is applied when persistence must be ignored.
3402 */
3403 if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3404 srv = NULL;
3405
3406 while (srv) {
3407 if (srv->cookie && (srv->cklen == delim - val_beg) &&
3408 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
3409 if ((srv->cur_state != SRV_ST_STOPPED) ||
3410 (s->be->options & PR_O_PERSIST) ||
3411 (s->flags & SF_FORCE_PRST)) {
3412 /* we found the server and we can use it */
3413 txn->flags &= ~TX_CK_MASK;
3414 txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
3415 s->flags |= SF_DIRECT | SF_ASSIGNED;
3416 s->target = &srv->obj_type;
3417 break;
3418 } else {
3419 /* we found a server, but it's down,
3420 * mark it as such and go on in case
3421 * another one is available.
3422 */
3423 txn->flags &= ~TX_CK_MASK;
3424 txn->flags |= TX_CK_DOWN;
3425 }
3426 }
3427 srv = srv->next;
3428 }
3429
3430 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
3431 /* no server matched this cookie or we deliberately skipped it */
3432 txn->flags &= ~TX_CK_MASK;
3433 if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3434 txn->flags |= TX_CK_UNUSED;
3435 else
3436 txn->flags |= TX_CK_INVALID;
3437 }
3438
3439 /* depending on the cookie mode, we may have to either :
3440 * - delete the complete cookie if we're in insert+indirect mode, so that
3441 * the server never sees it ;
3442 * - remove the server id from the cookie value, and tag the cookie as an
Joseph Herlante9d5c722018-11-25 11:00:25 -08003443 * application cookie so that it does not get accidentally removed later,
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003444 * if we're in cookie prefix mode
3445 */
3446 if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
3447 int delta; /* negative */
3448
3449 memmove(val_beg, delim + 1, hdr_end - (delim + 1));
3450 delta = val_beg - (delim + 1);
3451 val_end += delta;
3452 next += delta;
3453 hdr_end += delta;
3454 del_from = NULL;
3455 preserve_hdr = 1; /* we want to keep this cookie */
3456 }
3457 else if (del_from == NULL &&
3458 (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
3459 del_from = prev;
3460 }
3461 }
3462 else {
3463 /* This is not our cookie, so we must preserve it. But if we already
3464 * scheduled another cookie for removal, we cannot remove the
3465 * complete header, but we can remove the previous block itself.
3466 */
3467 preserve_hdr = 1;
3468
3469 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003470 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003471 if (att_beg >= del_from)
3472 att_beg += delta;
3473 if (att_end >= del_from)
3474 att_end += delta;
3475 val_beg += delta;
3476 val_end += delta;
3477 next += delta;
3478 hdr_end += delta;
3479 prev = del_from;
3480 del_from = NULL;
3481 }
3482 }
3483
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003484 } /* for each cookie */
3485
3486
3487 /* There are no more cookies on this line.
3488 * We may still have one (or several) marked for deletion at the
3489 * end of the line. We must do this now in two ways :
3490 * - if some cookies must be preserved, we only delete from the
3491 * mark to the end of line ;
3492 * - if nothing needs to be preserved, simply delete the whole header
3493 */
3494 if (del_from) {
3495 hdr_end = (preserve_hdr ? del_from : hdr_beg);
3496 }
3497 if ((hdr_end - hdr_beg) != ctx.value.len) {
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003498 if (hdr_beg != hdr_end)
3499 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003500 else
3501 http_remove_header(htx, &ctx);
3502 }
3503 } /* for each "Cookie header */
3504}
3505
3506/*
3507 * Manage server-side cookies. It can impact performance by about 2% so it is
3508 * desirable to call it only when needed. This function is also used when we
3509 * just need to know if there is a cookie (eg: for check-cache).
3510 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003511static void http_manage_server_side_cookies(struct stream *s, struct channel *res)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003512{
3513 struct session *sess = s->sess;
3514 struct http_txn *txn = s->txn;
3515 struct htx *htx;
3516 struct http_hdr_ctx ctx;
3517 struct server *srv;
3518 char *hdr_beg, *hdr_end;
3519 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau6f7a02a2019-04-15 21:49:49 +02003520 int is_cookie2 = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003521
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003522 htx = htxbuf(&res->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003523
3524 ctx.blk = NULL;
3525 while (1) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003526 int is_first = 1;
3527
Andrew McDermott86032c32022-02-11 18:26:49 +00003528 if (is_cookie2 || !http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) {
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003529 if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1))
3530 break;
3531 is_cookie2 = 1;
3532 }
3533
3534 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
3535 * <prev> points to the colon.
3536 */
3537 txn->flags |= TX_SCK_PRESENT;
3538
3539 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
3540 * check-cache is enabled) and we are not interested in checking
3541 * them. Warning, the cookie capture is declared in the frontend.
3542 */
3543 if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
3544 break;
3545
3546 /* OK so now we know we have to process this response cookie.
3547 * The format of the Set-Cookie header is slightly different
3548 * from the format of the Cookie header in that it does not
3549 * support the comma as a cookie delimiter (thus the header
3550 * cannot be folded) because the Expires attribute described in
3551 * the original Netscape's spec may contain an unquoted date
3552 * with a comma inside. We have to live with this because
3553 * many browsers don't support Max-Age and some browsers don't
3554 * support quoted strings. However the Set-Cookie2 header is
3555 * clean.
3556 *
3557 * We have to keep multiple pointers in order to support cookie
3558 * removal at the beginning, middle or end of header without
3559 * corrupting the header (in case of set-cookie2). A special
3560 * pointer, <scav> points to the beginning of the set-cookie-av
3561 * fields after the first semi-colon. The <next> pointer points
3562 * either to the end of line (set-cookie) or next unquoted comma
3563 * (set-cookie2). All of these headers are valid :
3564 *
3565 * hdr_beg hdr_end
3566 * | |
3567 * v |
3568 * NAME1 = VALUE 1 ; Secure; Path="/" |
3569 * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v
3570 * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT
3571 * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard
3572 * | | | | | | | |
3573 * | | | | | | | +-> next
3574 * | | | | | | +------------> scav
3575 * | | | | | +--------------> val_end
3576 * | | | | +--------------------> val_beg
3577 * | | | +----------------------> equal
3578 * | | +------------------------> att_end
3579 * | +----------------------------> att_beg
3580 * +------------------------------> prev
3581 * -------------------------------> hdr_beg
3582 */
3583 hdr_beg = ctx.value.ptr;
3584 hdr_end = hdr_beg + ctx.value.len;
3585 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3586
3587 /* Iterate through all cookies on this line */
3588
3589 /* find att_beg */
3590 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003591 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003592 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003593 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003594
3595 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3596 att_beg++;
3597
3598 /* find att_end : this is the first character after the last non
3599 * space before the equal. It may be equal to hdr_end.
3600 */
3601 equal = att_end = att_beg;
3602
3603 while (equal < hdr_end) {
3604 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
3605 break;
3606 if (HTTP_IS_SPHT(*equal++))
3607 continue;
3608 att_end = equal;
3609 }
3610
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003611 /* here, <equal> points to '=', a delimiter or the end. <att_end>
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003612 * is between <att_beg> and <equal>, both may be identical.
3613 */
3614
3615 /* look for end of cookie if there is an equal sign */
3616 if (equal < hdr_end && *equal == '=') {
3617 /* look for the beginning of the value */
3618 val_beg = equal + 1;
3619 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3620 val_beg++;
3621
3622 /* find the end of the value, respecting quotes */
3623 next = http_find_cookie_value_end(val_beg, hdr_end);
3624
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003625 /* make val_end point to the first white space or delimiter after the value */
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003626 val_end = next;
3627 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3628 val_end--;
3629 }
3630 else {
3631 /* <equal> points to next comma, semi-colon or EOL */
3632 val_beg = val_end = next = equal;
3633 }
3634
3635 if (next < hdr_end) {
3636 /* Set-Cookie2 supports multiple cookies, and <next> points to
3637 * a colon or semi-colon before the end. So skip all attr-value
3638 * pairs and look for the next comma. For Set-Cookie, since
3639 * commas are permitted in values, skip to the end.
3640 */
3641 if (is_cookie2)
3642 next = http_find_hdr_value_end(next, hdr_end);
3643 else
3644 next = hdr_end;
3645 }
3646
3647 /* Now everything is as on the diagram above */
3648
3649 /* Ignore cookies with no equal sign */
3650 if (equal == val_end)
3651 continue;
3652
3653 /* If there are spaces around the equal sign, we need to
3654 * strip them otherwise we'll get trouble for cookie captures,
3655 * or even for rewrites. Since this happens extremely rarely,
3656 * it does not hurt performance.
3657 */
3658 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3659 int stripped_before = 0;
3660 int stripped_after = 0;
3661
3662 if (att_end != equal) {
3663 memmove(att_end, equal, hdr_end - equal);
3664 stripped_before = (att_end - equal);
3665 equal += stripped_before;
3666 val_beg += stripped_before;
3667 }
3668
3669 if (val_beg > equal + 1) {
3670 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3671 stripped_after = (equal + 1) - val_beg;
3672 val_beg += stripped_after;
3673 stripped_before += stripped_after;
3674 }
3675
3676 val_end += stripped_before;
3677 next += stripped_before;
3678 hdr_end += stripped_before;
3679
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003680 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003681 ctx.value.len = hdr_end - hdr_beg;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003682 }
3683
3684 /* First, let's see if we want to capture this cookie. We check
3685 * that we don't already have a server side cookie, because we
3686 * can only capture one. Also as an optimisation, we ignore
3687 * cookies shorter than the declared name.
3688 */
3689 if (sess->fe->capture_name != NULL &&
3690 txn->srv_cookie == NULL &&
3691 (val_end - att_beg >= sess->fe->capture_namelen) &&
3692 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3693 int log_len = val_end - att_beg;
3694 if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
3695 ha_alert("HTTP logging : out of memory.\n");
3696 }
3697 else {
3698 if (log_len > sess->fe->capture_len)
3699 log_len = sess->fe->capture_len;
3700 memcpy(txn->srv_cookie, att_beg, log_len);
3701 txn->srv_cookie[log_len] = 0;
3702 }
3703 }
3704
3705 srv = objt_server(s->target);
3706 /* now check if we need to process it for persistence */
3707 if (!(s->flags & SF_IGNORE_PRST) &&
3708 (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3709 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3710 /* assume passive cookie by default */
3711 txn->flags &= ~TX_SCK_MASK;
3712 txn->flags |= TX_SCK_FOUND;
3713
3714 /* If the cookie is in insert mode on a known server, we'll delete
3715 * this occurrence because we'll insert another one later.
3716 * We'll delete it too if the "indirect" option is set and we're in
3717 * a direct access.
3718 */
3719 if (s->be->ck_opts & PR_CK_PSV) {
3720 /* The "preserve" flag was set, we don't want to touch the
3721 * server's cookie.
3722 */
3723 }
3724 else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
3725 ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
3726 /* this cookie must be deleted */
3727 if (prev == hdr_beg && next == hdr_end) {
3728 /* whole header */
3729 http_remove_header(htx, &ctx);
3730 /* note: while both invalid now, <next> and <hdr_end>
3731 * are still equal, so the for() will stop as expected.
3732 */
3733 } else {
3734 /* just remove the value */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003735 int delta = http_del_hdr_value(hdr_beg, hdr_end, &prev, next);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003736 next = prev;
3737 hdr_end += delta;
3738 }
3739 txn->flags &= ~TX_SCK_MASK;
3740 txn->flags |= TX_SCK_DELETED;
3741 /* and go on with next cookie */
3742 }
3743 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
3744 /* replace bytes val_beg->val_end with the cookie name associated
3745 * with this server since we know it.
3746 */
3747 int sliding, delta;
3748
3749 ctx.value = ist2(val_beg, val_end - val_beg);
3750 ctx.lws_before = ctx.lws_after = 0;
3751 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen));
3752 delta = srv->cklen - (val_end - val_beg);
3753 sliding = (ctx.value.ptr - val_beg);
3754 hdr_beg += sliding;
3755 val_beg += sliding;
3756 next += sliding + delta;
3757 hdr_end += sliding + delta;
3758
3759 txn->flags &= ~TX_SCK_MASK;
3760 txn->flags |= TX_SCK_REPLACED;
3761 }
3762 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
3763 /* insert the cookie name associated with this server
3764 * before existing cookie, and insert a delimiter between them..
3765 */
3766 int sliding, delta;
3767 ctx.value = ist2(val_beg, 0);
3768 ctx.lws_before = ctx.lws_after = 0;
3769 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1));
3770 delta = srv->cklen + 1;
3771 sliding = (ctx.value.ptr - val_beg);
3772 hdr_beg += sliding;
3773 val_beg += sliding;
3774 next += sliding + delta;
3775 hdr_end += sliding + delta;
3776
3777 val_beg[srv->cklen] = COOKIE_DELIM;
3778 txn->flags &= ~TX_SCK_MASK;
3779 txn->flags |= TX_SCK_REPLACED;
3780 }
3781 }
3782 /* that's done for this cookie, check the next one on the same
3783 * line when next != hdr_end (only if is_cookie2).
3784 */
3785 }
3786 }
3787}
3788
Christopher Faulet25a02f62018-10-24 12:00:25 +02003789/*
3790 * Parses the Cache-Control and Pragma request header fields to determine if
3791 * the request may be served from the cache and/or if it is cacheable. Updates
3792 * s->txn->flags.
3793 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003794void http_check_request_for_cacheability(struct stream *s, struct channel *req)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003795{
3796 struct http_txn *txn = s->txn;
3797 struct htx *htx;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003798 struct http_hdr_ctx ctx = { .blk = NULL };
3799 int pragma_found, cc_found;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003800
3801 if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
3802 return; /* nothing more to do here */
3803
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003804 htx = htxbuf(&req->buf);
Christopher Faulet25a02f62018-10-24 12:00:25 +02003805 pragma_found = cc_found = 0;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003806
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003807 /* Check "pragma" header for HTTP/1.0 compatibility. */
3808 if (http_find_header(htx, ist("pragma"), &ctx, 1)) {
3809 if (isteqi(ctx.value, ist("no-cache"))) {
3810 pragma_found = 1;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003811 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003812 }
Christopher Faulet25a02f62018-10-24 12:00:25 +02003813
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003814 ctx.blk = NULL;
3815 /* Don't use the cache and don't try to store if we found the
3816 * Authorization header */
3817 if (http_find_header(htx, ist("authorization"), &ctx, 1)) {
3818 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3819 txn->flags |= TX_CACHE_IGNORE;
3820 }
Christopher Faulet25a02f62018-10-24 12:00:25 +02003821
Christopher Faulet25a02f62018-10-24 12:00:25 +02003822
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003823 /* Look for "cache-control" header and iterate over all the values
3824 * until we find one that specifies that caching is possible or not. */
3825 ctx.blk = NULL;
3826 while (http_find_header(htx, ist("cache-control"), &ctx, 0)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003827 cc_found = 1;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003828 /* We don't check the values after max-age, max-stale nor min-fresh,
3829 * we simply don't use the cache when they're specified. */
3830 if (istmatchi(ctx.value, ist("max-age")) ||
3831 istmatchi(ctx.value, ist("no-cache")) ||
3832 istmatchi(ctx.value, ist("max-stale")) ||
3833 istmatchi(ctx.value, ist("min-fresh"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003834 txn->flags |= TX_CACHE_IGNORE;
3835 continue;
3836 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003837 if (istmatchi(ctx.value, ist("no-store"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003838 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3839 continue;
3840 }
3841 }
3842
3843 /* RFC7234#5.4:
3844 * When the Cache-Control header field is also present and
3845 * understood in a request, Pragma is ignored.
3846 * When the Cache-Control header field is not present in a
3847 * request, caches MUST consider the no-cache request
3848 * pragma-directive as having the same effect as if
3849 * "Cache-Control: no-cache" were present.
3850 */
3851 if (!cc_found && pragma_found)
3852 txn->flags |= TX_CACHE_IGNORE;
3853}
3854
3855/*
3856 * Check if response is cacheable or not. Updates s->txn->flags.
3857 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003858void http_check_response_for_cacheability(struct stream *s, struct channel *res)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003859{
3860 struct http_txn *txn = s->txn;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003861 struct http_hdr_ctx ctx = { .blk = NULL };
Christopher Faulet25a02f62018-10-24 12:00:25 +02003862 struct htx *htx;
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003863 int has_freshness_info = 0;
3864 int has_validator = 0;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003865
3866 if (txn->status < 200) {
3867 /* do not try to cache interim responses! */
3868 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3869 return;
3870 }
3871
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003872 htx = htxbuf(&res->buf);
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003873 /* Check "pragma" header for HTTP/1.0 compatibility. */
3874 if (http_find_header(htx, ist("pragma"), &ctx, 1)) {
3875 if (isteqi(ctx.value, ist("no-cache"))) {
3876 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3877 return;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003878 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003879 }
Christopher Faulet25a02f62018-10-24 12:00:25 +02003880
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003881 /* Look for "cache-control" header and iterate over all the values
3882 * until we find one that specifies that caching is possible or not. */
3883 ctx.blk = NULL;
3884 while (http_find_header(htx, ist("cache-control"), &ctx, 0)) {
3885 if (isteqi(ctx.value, ist("public"))) {
3886 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003887 continue;
3888 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003889 if (isteqi(ctx.value, ist("private")) ||
3890 isteqi(ctx.value, ist("no-cache")) ||
3891 isteqi(ctx.value, ist("no-store")) ||
3892 isteqi(ctx.value, ist("max-age=0")) ||
3893 isteqi(ctx.value, ist("s-maxage=0"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003894 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003895 continue;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003896 }
Remi Tricot-Le Breton40ed97b2020-10-28 11:35:15 +01003897 /* We might have a no-cache="set-cookie" form. */
3898 if (istmatchi(ctx.value, ist("no-cache=\"set-cookie"))) {
3899 txn->flags &= ~TX_CACHE_COOK;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003900 continue;
3901 }
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003902
3903 if (istmatchi(ctx.value, ist("s-maxage")) ||
3904 istmatchi(ctx.value, ist("max-age"))) {
3905 has_freshness_info = 1;
3906 continue;
3907 }
3908 }
3909
3910 /* If no freshness information could be found in Cache-Control values,
3911 * look for an Expires header. */
3912 if (!has_freshness_info) {
3913 ctx.blk = NULL;
3914 has_freshness_info = http_find_header(htx, ist("expires"), &ctx, 0);
Christopher Faulet25a02f62018-10-24 12:00:25 +02003915 }
Remi Tricot-Le Bretoncc9bf2e2020-11-12 11:14:41 +01003916
3917 /* If no freshness information could be found in Cache-Control or Expires
3918 * values, look for an explicit validator. */
3919 if (!has_freshness_info) {
3920 ctx.blk = NULL;
3921 has_validator = 1;
3922 if (!http_find_header(htx, ist("etag"), &ctx, 0)) {
3923 ctx.blk = NULL;
3924 if (!http_find_header(htx, ist("last-modified"), &ctx, 0))
3925 has_validator = 0;
3926 }
3927 }
3928
3929 /* We won't store an entry that has neither a cache validator nor an
3930 * explicit expiration time, as suggested in RFC 7234#3. */
3931 if (!has_freshness_info && !has_validator)
3932 txn->flags |= TX_CACHE_IGNORE;
Christopher Faulet25a02f62018-10-24 12:00:25 +02003933}
3934
Christopher Faulet377c5a52018-10-24 21:21:30 +02003935/*
3936 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
3937 * for the current backend.
3938 *
3939 * It is assumed that the request is either a HEAD, GET, or POST and that the
3940 * uri_auth field is valid.
3941 *
3942 * Returns 1 if stats should be provided, otherwise 0.
3943 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003944static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend)
Christopher Faulet377c5a52018-10-24 21:21:30 +02003945{
3946 struct uri_auth *uri_auth = backend->uri_auth;
3947 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003948 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02003949 struct ist uri;
Christopher Faulet377c5a52018-10-24 21:21:30 +02003950
3951 if (!uri_auth)
3952 return 0;
3953
3954 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
3955 return 0;
3956
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003957 htx = htxbuf(&s->req.buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02003958 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003959 uri = htx_sl_req_uri(sl);
Willy Tarreau1eb3b482019-10-31 15:50:28 +01003960 if (*uri_auth->uri_prefix == '/')
3961 uri = http_get_path(uri);
Christopher Faulet377c5a52018-10-24 21:21:30 +02003962
3963 /* check URI size */
3964 if (uri_auth->uri_len > uri.len)
3965 return 0;
3966
3967 if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
3968 return 0;
3969
3970 return 1;
3971}
3972
3973/* This function prepares an applet to handle the stats. It can deal with the
3974 * "100-continue" expectation, check that admin rules are met for POST requests,
3975 * and program a response message if something was unexpected. It cannot fail
3976 * and always relies on the stats applet to complete the job. It does not touch
3977 * analysers nor counters, which are left to the caller. It does not touch
3978 * s->target which is supposed to already point to the stats applet. The caller
3979 * is expected to have already assigned an appctx to the stream.
3980 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003981static int http_handle_stats(struct stream *s, struct channel *req)
Christopher Faulet377c5a52018-10-24 21:21:30 +02003982{
3983 struct stats_admin_rule *stats_admin_rule;
3984 struct stream_interface *si = &s->si[1];
3985 struct session *sess = s->sess;
3986 struct http_txn *txn = s->txn;
3987 struct http_msg *msg = &txn->req;
3988 struct uri_auth *uri_auth = s->be->uri_auth;
3989 const char *h, *lookup, *end;
3990 struct appctx *appctx;
3991 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003992 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02003993
3994 appctx = si_appctx(si);
3995 memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
3996 appctx->st1 = appctx->st2 = 0;
3997 appctx->ctx.stats.st_code = STAT_STATUS_INIT;
Willy Tarreau676c29e2019-10-09 10:50:01 +02003998 appctx->ctx.stats.flags |= uri_auth->flags;
Christopher Faulet377c5a52018-10-24 21:21:30 +02003999 appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
4000 if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD))
4001 appctx->ctx.stats.flags |= STAT_CHUNKED;
4002
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004003 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004004 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004005 lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len;
4006 end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004007
4008 for (h = lookup; h <= end - 3; h++) {
4009 if (memcmp(h, ";up", 3) == 0) {
4010 appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
4011 break;
4012 }
Amaury Denoyelle91e55ea2021-02-25 14:46:08 +01004013 }
4014
4015 for (h = lookup; h <= end - 9; h++) {
4016 if (memcmp(h, ";no-maint", 9) == 0) {
Willy Tarreau3e320362020-10-23 17:28:57 +02004017 appctx->ctx.stats.flags |= STAT_HIDE_MAINT;
4018 break;
4019 }
Christopher Faulet377c5a52018-10-24 21:21:30 +02004020 }
4021
4022 if (uri_auth->refresh) {
4023 for (h = lookup; h <= end - 10; h++) {
4024 if (memcmp(h, ";norefresh", 10) == 0) {
4025 appctx->ctx.stats.flags |= STAT_NO_REFRESH;
4026 break;
4027 }
4028 }
4029 }
4030
4031 for (h = lookup; h <= end - 4; h++) {
4032 if (memcmp(h, ";csv", 4) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004033 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004034 break;
4035 }
4036 }
4037
4038 for (h = lookup; h <= end - 6; h++) {
4039 if (memcmp(h, ";typed", 6) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004040 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004041 appctx->ctx.stats.flags |= STAT_FMT_TYPED;
4042 break;
4043 }
4044 }
4045
Christopher Faulet6338a082019-09-09 15:50:54 +02004046 for (h = lookup; h <= end - 5; h++) {
4047 if (memcmp(h, ";json", 5) == 0) {
4048 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
4049 appctx->ctx.stats.flags |= STAT_FMT_JSON;
4050 break;
4051 }
4052 }
4053
4054 for (h = lookup; h <= end - 12; h++) {
4055 if (memcmp(h, ";json-schema", 12) == 0) {
4056 appctx->ctx.stats.flags &= ~STAT_FMT_MASK;
4057 appctx->ctx.stats.flags |= STAT_JSON_SCHM;
4058 break;
4059 }
4060 }
4061
Christopher Faulet377c5a52018-10-24 21:21:30 +02004062 for (h = lookup; h <= end - 8; h++) {
4063 if (memcmp(h, ";st=", 4) == 0) {
4064 int i;
4065 h += 4;
4066 appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
4067 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
4068 if (strncmp(stat_status_codes[i], h, 4) == 0) {
4069 appctx->ctx.stats.st_code = i;
4070 break;
4071 }
4072 }
4073 break;
4074 }
4075 }
4076
4077 appctx->ctx.stats.scope_str = 0;
4078 appctx->ctx.stats.scope_len = 0;
4079 for (h = lookup; h <= end - 8; h++) {
4080 if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
4081 int itx = 0;
4082 const char *h2;
4083 char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
4084 const char *err;
4085
4086 h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
4087 h2 = h;
Christopher Fauleted7a0662019-01-14 11:07:34 +01004088 appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl);
4089 while (h < end) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004090 if (*h == ';' || *h == '&' || *h == ' ')
4091 break;
4092 itx++;
4093 h++;
4094 }
4095
4096 if (itx > STAT_SCOPE_TXT_MAXLEN)
4097 itx = STAT_SCOPE_TXT_MAXLEN;
4098 appctx->ctx.stats.scope_len = itx;
4099
4100 /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
4101 memcpy(scope_txt, h2, itx);
4102 scope_txt[itx] = '\0';
4103 err = invalid_char(scope_txt);
4104 if (err) {
4105 /* bad char in search text => clear scope */
4106 appctx->ctx.stats.scope_str = 0;
4107 appctx->ctx.stats.scope_len = 0;
4108 }
4109 break;
4110 }
4111 }
4112
4113 /* now check whether we have some admin rules for this request */
4114 list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
4115 int ret = 1;
4116
4117 if (stats_admin_rule->cond) {
4118 ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
4119 ret = acl_pass(ret);
4120 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
4121 ret = !ret;
4122 }
4123
4124 if (ret) {
4125 /* no rule, or the rule matches */
4126 appctx->ctx.stats.flags |= STAT_ADMIN;
4127 break;
4128 }
4129 }
4130
Christopher Faulet5d45e382019-02-27 15:15:23 +01004131 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
4132 appctx->st0 = STAT_HTTP_HEAD;
4133 else if (txn->meth == HTTP_METH_POST) {
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004134 if (appctx->ctx.stats.flags & STAT_ADMIN) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004135 appctx->st0 = STAT_HTTP_POST;
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004136 if (msg->msg_state < HTTP_MSG_DATA)
4137 req->analysers |= AN_REQ_HTTP_BODY;
4138 }
Christopher Faulet377c5a52018-10-24 21:21:30 +02004139 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004140 /* POST without admin level */
Christopher Faulet377c5a52018-10-24 21:21:30 +02004141 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4142 appctx->ctx.stats.st_code = STAT_STATUS_DENY;
4143 appctx->st0 = STAT_HTTP_LAST;
4144 }
4145 }
4146 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004147 /* Unsupported method */
4148 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4149 appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
4150 appctx->st0 = STAT_HTTP_LAST;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004151 }
4152
4153 s->task->nice = -32; /* small boost for HTTP statistics */
4154 return 1;
4155}
4156
Christopher Faulet021a8e42021-03-29 10:46:38 +02004157/* This function waits for the message payload at most <time> milliseconds (may
4158 * be set to TICK_ETERNITY). It stops to wait if at least <bytes> bytes of the
4159 * payload are received (0 means no limit). It returns HTTP_RULE_* depending on
4160 * the result:
4161 *
4162 * - HTTP_RULE_RES_CONT when conditions are met to stop waiting
4163 * - HTTP_RULE_RES_YIELD to wait for more data
Ilya Shipitsinb2be9a12021-04-24 13:25:42 +05004164 * - HTTP_RULE_RES_ABRT when a timeout occurred.
Christopher Faulet021a8e42021-03-29 10:46:38 +02004165 * - HTTP_RULE_RES_BADREQ if a parsing error is raised by lower level
Ilya Shipitsinb2be9a12021-04-24 13:25:42 +05004166 * - HTTP_RULE_RES_ERROR if an internal error occurred
Christopher Faulet021a8e42021-03-29 10:46:38 +02004167 *
Ilya Shipitsinb2be9a12021-04-24 13:25:42 +05004168 * If a timeout occurred, this function is responsible to emit the right response
Christopher Faulet021a8e42021-03-29 10:46:38 +02004169 * to the client, depending on the channel (408 on request side, 504 on response
4170 * side). All other errors must be handled by the caller.
4171 */
4172enum rule_result http_wait_for_msg_body(struct stream *s, struct channel *chn,
4173 unsigned int time, unsigned int bytes)
4174{
4175 struct session *sess = s->sess;
4176 struct http_txn *txn = s->txn;
4177 struct http_msg *msg = ((chn->flags & CF_ISRESP) ? &txn->rsp : &txn->req);
4178 struct htx *htx;
4179 enum rule_result ret = HTTP_RULE_RES_CONT;
4180
4181 htx = htxbuf(&chn->buf);
4182
4183 if (htx->flags & HTX_FL_PARSING_ERROR) {
4184 ret = HTTP_RULE_RES_BADREQ;
4185 goto end;
4186 }
4187 if (htx->flags & HTX_FL_PROCESSING_ERROR) {
4188 ret = HTTP_RULE_RES_ERROR;
4189 goto end;
4190 }
4191
4192 /* Do nothing for bodyless and CONNECT requests */
4193 if (txn->meth == HTTP_METH_CONNECT || (msg->flags & HTTP_MSGF_BODYLESS))
4194 goto end;
4195
4196 if (!(chn->flags & CF_ISRESP) && msg->msg_state < HTTP_MSG_DATA) {
4197 if (http_handle_expect_hdr(s, htx, msg) == -1) {
4198 ret = HTTP_RULE_RES_ERROR;
4199 goto end;
4200 }
4201 }
4202
4203 msg->msg_state = HTTP_MSG_DATA;
4204
4205 /* Now we're in HTTP_MSG_DATA. We just need to know if all data have
4206 * been received or if the buffer is full.
4207 */
Christopher Faulet59df8122021-09-23 14:46:32 +02004208 if ((htx->flags & HTX_FL_EOM) ||
4209 htx_get_tail_type(htx) > HTX_BLK_DATA ||
4210 channel_htx_full(chn, htx, global.tune.maxrewrite) ||
4211 si_rx_blocked_room(chn_prod(chn)))
Christopher Faulet021a8e42021-03-29 10:46:38 +02004212 goto end;
4213
4214 if (bytes) {
4215 struct htx_blk *blk;
4216 unsigned int len = 0;
4217
4218 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
4219 if (htx_get_blk_type(blk) != HTX_BLK_DATA)
4220 continue;
4221 len += htx_get_blksz(blk);
4222 if (len >= bytes)
4223 goto end;
4224 }
4225 }
4226
4227 if ((chn->flags & CF_READ_TIMEOUT) || tick_is_expired(chn->analyse_exp, now_ms)) {
4228 if (!(chn->flags & CF_ISRESP))
4229 goto abort_req;
4230 goto abort_res;
4231 }
4232
4233 /* we get here if we need to wait for more data */
4234 if (!(chn->flags & (CF_SHUTR | CF_READ_ERROR))) {
4235 if (!tick_isset(chn->analyse_exp))
4236 chn->analyse_exp = tick_add_ifset(now_ms, time);
4237 ret = HTTP_RULE_RES_YIELD;
4238 }
4239
4240 end:
4241 return ret;
4242
4243 abort_req:
4244 txn->status = 408;
4245 if (!(s->flags & SF_ERR_MASK))
4246 s->flags |= SF_ERR_CLITO;
4247 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet1a023fa2023-01-13 10:49:31 +01004248 s->flags |= SF_FINST_R;
Willy Tarreau4781b152021-04-06 13:53:36 +02004249 _HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
Christopher Faulet021a8e42021-03-29 10:46:38 +02004250 if (sess->listener && sess->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02004251 _HA_ATOMIC_INC(&sess->listener->counters->failed_req);
Christopher Faulet021a8e42021-03-29 10:46:38 +02004252 http_reply_and_close(s, txn->status, http_error_message(s));
4253 ret = HTTP_RULE_RES_ABRT;
4254 goto end;
4255
4256 abort_res:
4257 txn->status = 504;
4258 if (!(s->flags & SF_ERR_MASK))
4259 s->flags |= SF_ERR_SRVTO;
4260 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet1a023fa2023-01-13 10:49:31 +01004261 s->flags |= SF_FINST_R;
Christopher Faulet021a8e42021-03-29 10:46:38 +02004262 stream_inc_http_fail_ctr(s);
4263 http_reply_and_close(s, txn->status, http_error_message(s));
4264 ret = HTTP_RULE_RES_ABRT;
4265 goto end;
4266}
4267
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004268void http_perform_server_redirect(struct stream *s, struct stream_interface *si)
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004269{
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004270 struct channel *req = &s->req;
4271 struct channel *res = &s->res;
4272 struct server *srv;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004273 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004274 struct htx_sl *sl;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004275 struct ist path, location;
4276 unsigned int flags;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004277
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004278 /*
4279 * Create the location
4280 */
4281 chunk_reset(&trash);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004282
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004283 /* 1: add the server's prefix */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004284 /* special prefix "/" means don't change URL */
4285 srv = __objt_server(s->target);
4286 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
4287 if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len))
4288 return;
4289 }
4290
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004291 /* 2: add the request Path */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004292 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004293 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004294 path = http_get_path(htx_sl_req_uri(sl));
Tim Duesterhused526372020-03-05 17:56:33 +01004295 if (!isttest(path))
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004296 return;
4297
4298 if (!chunk_memcat(&trash, path.ptr, path.len))
4299 return;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004300 location = ist2(trash.area, trash.data);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004301
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004302 /*
4303 * Create the 302 respone
4304 */
4305 htx = htx_from_buf(&res->buf);
4306 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
4307 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4308 ist("HTTP/1.1"), ist("302"), ist("Found"));
4309 if (!sl)
4310 goto fail;
4311 sl->info.res.status = 302;
4312 s->txn->status = 302;
4313
4314 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
4315 !htx_add_header(htx, ist("Connection"), ist("close")) ||
4316 !htx_add_header(htx, ist("Content-length"), ist("0")) ||
4317 !htx_add_header(htx, ist("Location"), location))
4318 goto fail;
4319
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004320 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004321 goto fail;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004322
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004323 htx->flags |= HTX_FL_EOM;
Christopher Fauletc20afb82020-01-24 19:16:26 +01004324 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004325 if (!http_forward_proxy_resp(s, 1))
4326 goto fail;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004327
4328 /* return without error. */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004329 si_shutr(si);
4330 si_shutw(si);
4331 si->err_type = SI_ET_NONE;
4332 si->state = SI_ST_CLO;
4333
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004334 if (!(s->flags & SF_ERR_MASK))
4335 s->flags |= SF_ERR_LOCAL;
4336 if (!(s->flags & SF_FINST_MASK))
4337 s->flags |= SF_FINST_C;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004338
4339 /* FIXME: we should increase a counter of redirects per server and per backend. */
4340 srv_inc_sess_ctr(srv);
4341 srv_set_sess_last(srv);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004342 return;
4343
4344 fail:
4345 /* If an error occurred, remove the incomplete HTTP response from the
4346 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004347 channel_htx_truncate(res, htx);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004348}
4349
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05004350/* This function terminates the request because it was completely analyzed or
Christopher Fauletf2824e62018-10-01 12:12:37 +02004351 * because an error was triggered during the body forwarding.
4352 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004353static void http_end_request(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004354{
4355 struct channel *chn = &s->req;
4356 struct http_txn *txn = s->txn;
4357
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004358 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004359
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004360 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4361 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004362 channel_abort(chn);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004363 channel_htx_truncate(chn, htxbuf(&chn->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02004364 goto end;
4365 }
4366
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004367 if (unlikely(txn->req.msg_state < HTTP_MSG_DONE)) {
4368 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004369 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004370 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004371
4372 if (txn->req.msg_state == HTTP_MSG_DONE) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004373 /* No need to read anymore, the request was completely parsed.
4374 * We can shut the read side unless we want to abort_on_close,
4375 * or we have a POST request. The issue with POST requests is
4376 * that some browsers still send a CRLF after the request, and
4377 * this CRLF must be read so that it does not remain in the kernel
4378 * buffers, otherwise a close could cause an RST on some systems
4379 * (eg: Linux).
4380 */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004381 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004382 channel_dont_read(chn);
4383
4384 /* if the server closes the connection, we want to immediately react
4385 * and close the socket to save packets and syscalls.
4386 */
4387 s->si[1].flags |= SI_FL_NOHALF;
4388
4389 /* In any case we've finished parsing the request so we must
4390 * disable Nagle when sending data because 1) we're not going
4391 * to shut this side, and 2) the server is waiting for us to
4392 * send pending data.
4393 */
4394 chn->flags |= CF_NEVER_WAIT;
4395
Christopher Fauletd01ce402019-01-02 17:44:13 +01004396 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
4397 /* The server has not finished to respond, so we
4398 * don't want to move in order not to upset it.
4399 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004400 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletd01ce402019-01-02 17:44:13 +01004401 return;
4402 }
4403
Christopher Fauletf2824e62018-10-01 12:12:37 +02004404 /* When we get here, it means that both the request and the
4405 * response have finished receiving. Depending on the connection
4406 * mode, we'll have to wait for the last bytes to leave in either
4407 * direction, and sometimes for a close to be effective.
4408 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004409 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004410 /* Tunnel mode will not have any analyser so it needs to
4411 * poll for reads.
4412 */
4413 channel_auto_read(chn);
4414 txn->req.msg_state = HTTP_MSG_TUNNEL;
4415 }
4416 else {
4417 /* we're not expecting any new data to come for this
4418 * transaction, so we can close it.
Christopher Faulet9768c262018-10-22 09:34:31 +02004419 *
4420 * However, there is an exception if the response
4421 * length is undefined. In this case, we need to wait
4422 * the close from the server. The response will be
4423 * switched in TUNNEL mode until the end.
Christopher Fauletf2824e62018-10-01 12:12:37 +02004424 */
4425 if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
4426 txn->rsp.msg_state != HTTP_MSG_CLOSED)
Christopher Faulet9768c262018-10-22 09:34:31 +02004427 goto check_channel_flags;
Christopher Fauletf2824e62018-10-01 12:12:37 +02004428
4429 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4430 channel_shutr_now(chn);
4431 channel_shutw_now(chn);
4432 }
4433 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004434 goto check_channel_flags;
4435 }
4436
4437 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4438 http_msg_closing:
4439 /* nothing else to forward, just waiting for the output buffer
4440 * to be empty and for the shutw_now to take effect.
4441 */
4442 if (channel_is_empty(chn)) {
4443 txn->req.msg_state = HTTP_MSG_CLOSED;
4444 goto http_msg_closed;
4445 }
4446 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004447 txn->req.msg_state = HTTP_MSG_ERROR;
4448 goto end;
4449 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004450 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004451 return;
4452 }
4453
4454 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4455 http_msg_closed:
Christopher Fauletf2824e62018-10-01 12:12:37 +02004456 /* if we don't know whether the server will close, we need to hard close */
4457 if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
4458 s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
Christopher Fauletf2824e62018-10-01 12:12:37 +02004459 /* see above in MSG_DONE why we only do this in these states */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004460 if (!(s->be->options & PR_O_ABRT_CLOSE))
Christopher Fauletf2824e62018-10-01 12:12:37 +02004461 channel_dont_read(chn);
4462 goto end;
4463 }
4464
4465 check_channel_flags:
4466 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4467 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4468 /* if we've just closed an output, let's switch */
4469 txn->req.msg_state = HTTP_MSG_CLOSING;
4470 goto http_msg_closing;
4471 }
4472
4473 end:
4474 chn->analysers &= AN_REQ_FLT_END;
Christopher Faulet198ef8b2020-12-15 13:32:55 +01004475 if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
4476 chn->flags |= CF_NEVER_WAIT;
4477 if (HAS_REQ_DATA_FILTERS(s))
Christopher Fauletf2824e62018-10-01 12:12:37 +02004478 chn->analysers |= AN_REQ_FLT_XFER_DATA;
Christopher Faulet198ef8b2020-12-15 13:32:55 +01004479 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004480 channel_auto_close(chn);
4481 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004482 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004483}
4484
4485
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05004486/* This function terminates the response because it was completely analyzed or
Christopher Fauletf2824e62018-10-01 12:12:37 +02004487 * because an error was triggered during the body forwarding.
4488 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004489static void http_end_response(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004490{
4491 struct channel *chn = &s->res;
4492 struct http_txn *txn = s->txn;
4493
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004494 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004495
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004496 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4497 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004498 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004499 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004500 goto end;
4501 }
4502
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004503 if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE)) {
4504 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004505 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004506 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004507
4508 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4509 /* In theory, we don't need to read anymore, but we must
4510 * still monitor the server connection for a possible close
4511 * while the request is being uploaded, so we don't disable
4512 * reading.
4513 */
4514 /* channel_dont_read(chn); */
4515
4516 if (txn->req.msg_state < HTTP_MSG_DONE) {
4517 /* The client seems to still be sending data, probably
4518 * because we got an error response during an upload.
4519 * We have the choice of either breaking the connection
4520 * or letting it pass through. Let's do the later.
4521 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004522 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004523 return;
4524 }
4525
4526 /* When we get here, it means that both the request and the
4527 * response have finished receiving. Depending on the connection
4528 * mode, we'll have to wait for the last bytes to leave in either
4529 * direction, and sometimes for a close to be effective.
4530 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004531 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004532 channel_auto_read(chn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004533 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4534 }
4535 else {
4536 /* we're not expecting any new data to come for this
4537 * transaction, so we can close it.
4538 */
4539 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4540 channel_shutr_now(chn);
4541 channel_shutw_now(chn);
4542 }
4543 }
4544 goto check_channel_flags;
4545 }
4546
4547 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4548 http_msg_closing:
4549 /* nothing else to forward, just waiting for the output buffer
4550 * to be empty and for the shutw_now to take effect.
4551 */
4552 if (channel_is_empty(chn)) {
4553 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4554 goto http_msg_closed;
4555 }
4556 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004557 txn->rsp.msg_state = HTTP_MSG_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02004558 _HA_ATOMIC_INC(&strm_sess(s)->fe->fe_counters.cli_aborts);
4559 _HA_ATOMIC_INC(&s->be->be_counters.cli_aborts);
William Lallemand36119de2021-03-08 15:26:48 +01004560 if (strm_sess(s)->listener && strm_sess(s)->listener->counters)
Willy Tarreau4781b152021-04-06 13:53:36 +02004561 _HA_ATOMIC_INC(&strm_sess(s)->listener->counters->cli_aborts);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004562 if (objt_server(s->target))
Willy Tarreau4781b152021-04-06 13:53:36 +02004563 _HA_ATOMIC_INC(&__objt_server(s->target)->counters.cli_aborts);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004564 goto end;
4565 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004566 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004567 return;
4568 }
4569
4570 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4571 http_msg_closed:
4572 /* drop any pending data */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004573 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004574 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004575 goto end;
4576 }
4577
4578 check_channel_flags:
4579 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4580 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4581 /* if we've just closed an output, let's switch */
4582 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4583 goto http_msg_closing;
4584 }
4585
4586 end:
4587 chn->analysers &= AN_RES_FLT_END;
Christopher Faulet198ef8b2020-12-15 13:32:55 +01004588 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
4589 chn->flags |= CF_NEVER_WAIT;
4590 if (HAS_RSP_DATA_FILTERS(s))
4591 chn->analysers |= AN_RES_FLT_XFER_DATA;
4592 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004593 channel_auto_close(chn);
4594 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004595 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004596}
4597
Christopher Fauletef70e252020-01-28 09:26:19 +01004598/* Forward a response generated by HAProxy (error/redirect/return). This
4599 * function forwards all pending incoming data. If <final> is set to 0, nothing
4600 * more is performed. It is used for 1xx informational messages. Otherwise, the
Christopher Faulet507479b2020-05-15 12:29:46 +02004601 * transaction is terminated and the request is emptied. On success 1 is
Christopher Faulet40e6b552020-06-25 16:04:50 +02004602 * returned. If an error occurred, 0 is returned. If it fails, this function
4603 * only exits. It is the caller responsibility to do the cleanup.
Christopher Fauletef70e252020-01-28 09:26:19 +01004604 */
4605int http_forward_proxy_resp(struct stream *s, int final)
4606{
4607 struct channel *req = &s->req;
4608 struct channel *res = &s->res;
4609 struct htx *htx = htxbuf(&res->buf);
4610 size_t data;
4611
4612 if (final) {
4613 htx->flags |= HTX_FL_PROXY_RESP;
Christopher Faulet507479b2020-05-15 12:29:46 +02004614
Christopher Fauletaab1b672020-11-18 16:44:02 +01004615 if (!htx_is_empty(htx) && !http_eval_after_res_rules(s))
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01004616 return 0;
Christopher Fauletef70e252020-01-28 09:26:19 +01004617
Christopher Fauletd6c48362020-10-19 18:01:38 +02004618 if (s->txn->meth == HTTP_METH_HEAD)
4619 htx_skip_msg_payload(htx);
4620
Christopher Fauletef70e252020-01-28 09:26:19 +01004621 channel_auto_read(req);
4622 channel_abort(req);
4623 channel_auto_close(req);
4624 channel_htx_erase(req, htxbuf(&req->buf));
4625
4626 res->wex = tick_add_ifset(now_ms, res->wto);
4627 channel_auto_read(res);
4628 channel_auto_close(res);
4629 channel_shutr_now(res);
Christopher Faulet1a9db7c2020-06-25 15:36:45 +02004630 res->flags |= CF_EOI; /* The response is terminated, add EOI */
Christopher Faulet42432f32020-11-20 17:43:16 +01004631 htxbuf(&res->buf)->flags |= HTX_FL_EOM; /* no more data are expected */
Christopher Fauletef70e252020-01-28 09:26:19 +01004632 }
Christopher Fauletcf6898c2020-06-25 15:55:11 +02004633 else {
4634 /* Send ASAP informational messages. Rely on CF_EOI for final
4635 * response.
4636 */
4637 res->flags |= CF_SEND_DONTWAIT;
4638 }
Christopher Fauletef70e252020-01-28 09:26:19 +01004639
4640 data = htx->data - co_data(res);
4641 c_adv(res, data);
4642 htx->first = -1;
4643 res->total += data;
4644 return 1;
4645}
4646
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004647void http_server_error(struct stream *s, struct stream_interface *si, int err,
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004648 int finst, struct http_reply *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004649{
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004650 http_reply_and_close(s, s->txn->status, msg);
Christopher Faulet0f226952018-10-22 09:29:56 +02004651 if (!(s->flags & SF_ERR_MASK))
4652 s->flags |= err;
4653 if (!(s->flags & SF_FINST_MASK))
4654 s->flags |= finst;
4655}
4656
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004657void http_reply_and_close(struct stream *s, short status, struct http_reply *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004658{
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004659 if (!msg) {
4660 channel_htx_truncate(&s->res, htxbuf(&s->res.buf));
4661 goto end;
4662 }
4663
4664 if (http_reply_message(s, msg) == -1) {
4665 /* On error, return a 500 error message, but don't rewrite it if
Christopher Faulet40e6b552020-06-25 16:04:50 +02004666 * it is already an internal error. If it was already a "const"
4667 * 500 error, just fail.
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004668 */
Christopher Faulet40e6b552020-06-25 16:04:50 +02004669 if (s->txn->status == 500) {
4670 if (s->txn->flags & TX_CONST_REPLY)
4671 goto end;
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004672 s->txn->flags |= TX_CONST_REPLY;
Christopher Faulet40e6b552020-06-25 16:04:50 +02004673 }
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004674 s->txn->status = 500;
4675 s->txn->http_reply = NULL;
4676 return http_reply_and_close(s, s->txn->status, http_error_message(s));
4677 }
4678
4679end:
4680 s->res.wex = tick_add_ifset(now_ms, s->res.wto);
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004681
Christopher Fauletdb8ba102021-09-10 09:17:50 +02004682 /* At this staged, HTTP analysis is finished */
4683 s->req.analysers &= AN_REQ_FLT_END;
4684 s->req.analyse_exp = TICK_ETERNITY;
4685
4686 s->res.analysers &= AN_RES_FLT_END;
4687 s->res.analyse_exp = TICK_ETERNITY;
4688
Christopher Faulet0f226952018-10-22 09:29:56 +02004689 channel_auto_read(&s->req);
4690 channel_abort(&s->req);
4691 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004692 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004693 channel_auto_read(&s->res);
4694 channel_auto_close(&s->res);
4695 channel_shutr_now(&s->res);
Christopher Faulet0f226952018-10-22 09:29:56 +02004696}
4697
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004698struct http_reply *http_error_message(struct stream *s)
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004699{
4700 const int msgnum = http_get_status_idx(s->txn->status);
4701
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004702 if (s->txn->http_reply)
4703 return s->txn->http_reply;
4704 else if (s->be->replies[msgnum])
4705 return s->be->replies[msgnum];
4706 else if (strm_fe(s)->replies[msgnum])
4707 return strm_fe(s)->replies[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004708 else
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004709 return &http_err_replies[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004710}
4711
Christopher Faulet40e6b552020-06-25 16:04:50 +02004712/* Produces an HTX message from an http reply. Depending on the http reply type,
4713 * a, errorfile, an raw file or a log-format string is used. On success, it
4714 * returns 0. If an error occurs -1 is returned. If it fails, this function only
4715 * exits. It is the caller responsibility to do the cleanup.
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004716 */
Christopher Fauletae43b6c2020-05-27 15:24:22 +02004717int http_reply_to_htx(struct stream *s, struct htx *htx, struct http_reply *reply)
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004718{
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004719 struct buffer *errmsg;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004720 struct htx_sl *sl;
4721 struct buffer *body = NULL;
4722 const char *status, *reason, *clen, *ctype;
4723 unsigned int slflags;
4724 int ret = 0;
4725
Christopher Faulete29a97e2020-05-14 14:49:25 +02004726 /*
4727 * - HTTP_REPLY_ERRFILES unexpected here. handled as no payload if so
4728 *
4729 * - HTTP_REPLY_INDIRECT: switch on another reply if defined or handled
4730 * as no payload if NULL. the TXN status code is set with the status
4731 * of the original reply.
4732 */
4733
4734 if (reply->type == HTTP_REPLY_INDIRECT) {
4735 if (reply->body.reply)
4736 reply = reply->body.reply;
4737 }
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004738 if (reply->type == HTTP_REPLY_ERRMSG && !reply->body.errmsg) {
4739 /* get default error message */
4740 if (reply == s->txn->http_reply)
4741 s->txn->http_reply = NULL;
4742 reply = http_error_message(s);
4743 if (reply->type == HTTP_REPLY_INDIRECT) {
4744 if (reply->body.reply)
4745 reply = reply->body.reply;
4746 }
4747 }
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004748
4749 if (reply->type == HTTP_REPLY_ERRMSG) {
4750 /* implicit or explicit error message*/
4751 errmsg = reply->body.errmsg;
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004752 if (errmsg && !b_is_null(errmsg)) {
Christopher Faulet20567362020-05-15 14:52:49 +02004753 if (!htx_copy_msg(htx, errmsg))
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004754 goto fail;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004755 }
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004756 }
4757 else {
4758 /* no payload, file or log-format string */
4759 if (reply->type == HTTP_REPLY_RAW) {
4760 /* file */
4761 body = &reply->body.obj;
4762 }
4763 else if (reply->type == HTTP_REPLY_LOGFMT) {
4764 /* log-format string */
4765 body = alloc_trash_chunk();
4766 if (!body)
4767 goto fail_alloc;
4768 body->data = build_logline(s, body->area, body->size, &reply->body.fmt);
4769 }
4770 /* else no payload */
4771
4772 status = ultoa(reply->status);
4773 reason = http_get_reason(reply->status);
4774 slflags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_CLEN);
4775 if (!body || !b_data(body))
4776 slflags |= HTX_SL_F_BODYLESS;
4777 sl = htx_add_stline(htx, HTX_BLK_RES_SL, slflags, ist("HTTP/1.1"), ist(status), ist(reason));
4778 if (!sl)
4779 goto fail;
4780 sl->info.res.status = reply->status;
4781
4782 clen = (body ? ultoa(b_data(body)) : "0");
4783 ctype = reply->ctype;
4784
4785 if (!LIST_ISEMPTY(&reply->hdrs)) {
4786 struct http_reply_hdr *hdr;
4787 struct buffer *value = alloc_trash_chunk();
4788
4789 if (!value)
4790 goto fail;
4791
4792 list_for_each_entry(hdr, &reply->hdrs, list) {
4793 chunk_reset(value);
4794 value->data = build_logline(s, value->area, value->size, &hdr->value);
4795 if (b_data(value) && !htx_add_header(htx, hdr->name, ist2(b_head(value), b_data(value)))) {
4796 free_trash_chunk(value);
4797 goto fail;
4798 }
4799 chunk_reset(value);
4800 }
4801 free_trash_chunk(value);
4802 }
4803
4804 if (!htx_add_header(htx, ist("content-length"), ist(clen)) ||
4805 (body && b_data(body) && ctype && !htx_add_header(htx, ist("content-type"), ist(ctype))) ||
4806 !htx_add_endof(htx, HTX_BLK_EOH) ||
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004807 (body && b_data(body) && !htx_add_data_atonce(htx, ist2(b_head(body), b_data(body)))))
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004808 goto fail;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004809
4810 htx->flags |= HTX_FL_EOM;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004811 }
4812
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004813 leave:
4814 if (reply->type == HTTP_REPLY_LOGFMT)
4815 free_trash_chunk(body);
4816 return ret;
4817
4818 fail_alloc:
4819 if (!(s->flags & SF_ERR_MASK))
4820 s->flags |= SF_ERR_RESOURCE;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004821 /* fall through */
4822 fail:
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004823 ret = -1;
4824 goto leave;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004825}
4826
4827/* Send an http reply to the client. On success, it returns 0. If an error
Christopher Faulet40e6b552020-06-25 16:04:50 +02004828 * occurs -1 is returned and the response channel is truncated, removing this
4829 * way the faulty reply. This function may fail when the reply is formatted
4830 * (http_reply_to_htx) or when the reply is forwarded
4831 * (http_forward_proxy_resp). On the last case, it is because a
4832 * http-after-response rule fails.
Christopher Faulet97e466c2020-05-15 15:12:47 +02004833 */
4834int http_reply_message(struct stream *s, struct http_reply *reply)
4835{
4836 struct channel *res = &s->res;
4837 struct htx *htx = htx_from_buf(&res->buf);
4838
4839 if (s->txn->status == -1)
4840 s->txn->status = reply->status;
4841 channel_htx_truncate(res, htx);
4842
4843 if (http_reply_to_htx(s, htx, reply) == -1)
4844 goto fail;
4845
4846 htx_to_buf(htx, &s->res.buf);
4847 if (!http_forward_proxy_resp(s, 1))
4848 goto fail;
4849 return 0;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004850
4851 fail:
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004852 channel_htx_truncate(res, htx);
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004853 if (!(s->flags & SF_ERR_MASK))
4854 s->flags |= SF_ERR_PRXCOND;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004855 return -1;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004856}
4857
Christopher Faulet304cc402019-07-15 15:46:28 +02004858/* Return the error message corresponding to si->err_type. It is assumed
4859 * that the server side is closed. Note that err_type is actually a
4860 * bitmask, where almost only aborts may be cumulated with other
4861 * values. We consider that aborted operations are more important
4862 * than timeouts or errors due to the fact that nobody else in the
4863 * logs might explain incomplete retries. All others should avoid
4864 * being cumulated. It should normally not be possible to have multiple
4865 * aborts at once, but just in case, the first one in sequence is reported.
4866 * Note that connection errors appearing on the second request of a keep-alive
4867 * connection are not reported since this allows the client to retry.
4868 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004869void http_return_srv_error(struct stream *s, struct stream_interface *si)
Christopher Faulet304cc402019-07-15 15:46:28 +02004870{
4871 int err_type = si->err_type;
4872
4873 /* set s->txn->status for http_error_message(s) */
4874 s->txn->status = 503;
4875
4876 if (err_type & SI_ET_QUEUE_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004877 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_Q,
4878 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004879 else if (err_type & SI_ET_CONN_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004880 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_C,
4881 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4882 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004883 else if (err_type & SI_ET_QUEUE_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004884 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_Q,
4885 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004886 else if (err_type & SI_ET_QUEUE_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004887 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_Q,
4888 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004889 else if (err_type & SI_ET_CONN_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004890 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_C,
4891 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4892 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004893 else if (err_type & SI_ET_CONN_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004894 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_C,
4895 (s->flags & SF_SRV_REUSED) ? NULL :
4896 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004897 else if (err_type & SI_ET_CONN_RES)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004898 http_server_error(s, si, SF_ERR_RESOURCE, SF_FINST_C,
4899 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4900 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004901 else { /* SI_ET_CONN_OTHER and others */
4902 s->txn->status = 500;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004903 http_server_error(s, si, SF_ERR_INTERNAL, SF_FINST_C,
4904 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004905 }
4906}
4907
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004908
Christopher Faulet4a28a532019-03-01 11:19:40 +01004909/* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0
4910 * on success and -1 on error.
4911 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004912static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004913{
4914 /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
4915 * then we must send an HTTP/1.1 100 Continue intermediate response.
4916 */
4917 if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
4918 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
4919 struct ist hdr = { .ptr = "Expect", .len = 6 };
4920 struct http_hdr_ctx ctx;
4921
4922 ctx.blk = NULL;
4923 /* Expect is allowed in 1.1, look for it */
4924 if (http_find_header(htx, hdr, &ctx, 0) &&
4925 unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004926 if (http_reply_100_continue(s) == -1)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004927 return -1;
4928 http_remove_header(htx, &ctx);
4929 }
4930 }
4931 return 0;
4932}
4933
Christopher Faulet23a3c792018-11-28 10:01:23 +01004934/* Send a 100-Continue response to the client. It returns 0 on success and -1
4935 * on error. The response channel is updated accordingly.
4936 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004937static int http_reply_100_continue(struct stream *s)
Christopher Faulet23a3c792018-11-28 10:01:23 +01004938{
4939 struct channel *res = &s->res;
4940 struct htx *htx = htx_from_buf(&res->buf);
4941 struct htx_sl *sl;
4942 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
4943 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004944
4945 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4946 ist("HTTP/1.1"), ist("100"), ist("Continue"));
4947 if (!sl)
4948 goto fail;
4949 sl->info.res.status = 100;
4950
Christopher Faulet1d5ec092019-06-26 14:23:54 +02004951 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet23a3c792018-11-28 10:01:23 +01004952 goto fail;
4953
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004954 if (!http_forward_proxy_resp(s, 0))
4955 goto fail;
Christopher Faulet23a3c792018-11-28 10:01:23 +01004956 return 0;
4957
4958 fail:
4959 /* If an error occurred, remove the incomplete HTTP response from the
4960 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004961 channel_htx_truncate(res, htx);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004962 return -1;
4963}
4964
Christopher Faulet12c51e22018-11-28 15:59:42 +01004965
Christopher Faulet0f226952018-10-22 09:29:56 +02004966/*
4967 * Capture headers from message <htx> according to header list <cap_hdr>, and
4968 * fill the <cap> pointers appropriately.
4969 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004970static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
Christopher Faulet0f226952018-10-22 09:29:56 +02004971{
4972 struct cap_hdr *h;
4973 int32_t pos;
4974
Christopher Fauleta3f15502019-05-13 15:27:23 +02004975 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02004976 struct htx_blk *blk = htx_get_blk(htx, pos);
4977 enum htx_blk_type type = htx_get_blk_type(blk);
4978 struct ist n, v;
4979
4980 if (type == HTX_BLK_EOH)
4981 break;
4982 if (type != HTX_BLK_HDR)
4983 continue;
4984
4985 n = htx_get_blk_name(htx, blk);
4986
4987 for (h = cap_hdr; h; h = h->next) {
4988 if (h->namelen && (h->namelen == n.len) &&
4989 (strncasecmp(n.ptr, h->name, h->namelen) == 0)) {
4990 if (cap[h->index] == NULL)
4991 cap[h->index] =
4992 pool_alloc(h->pool);
4993
4994 if (cap[h->index] == NULL) {
4995 ha_alert("HTTP capture : out of memory.\n");
4996 break;
4997 }
4998
4999 v = htx_get_blk_value(htx, blk);
5000 if (v.len > h->len)
5001 v.len = h->len;
5002
5003 memcpy(cap[h->index], v.ptr, v.len);
5004 cap[h->index][v.len]=0;
5005 }
5006 }
5007 }
5008}
5009
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02005010/* Delete a value in a header between delimiters <from> and <next>. The header
5011 * itself is delimited by <start> and <end> pointers. The number of characters
5012 * displaced is returned, and the pointer to the first delimiter is updated if
5013 * required. The function tries as much as possible to respect the following
5014 * principles :
5015 * - replace <from> delimiter by the <next> one unless <from> points to <start>,
5016 * in which case <next> is simply removed
5017 * - set exactly one space character after the new first delimiter, unless there
5018 * are not enough characters in the block being moved to do so.
5019 * - remove unneeded spaces before the previous delimiter and after the new
5020 * one.
5021 *
5022 * It is the caller's responsibility to ensure that :
5023 * - <from> points to a valid delimiter or <start> ;
5024 * - <next> points to a valid delimiter or <end> ;
5025 * - there are non-space chars before <from>.
5026 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005027static int http_del_hdr_value(char *start, char *end, char **from, char *next)
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02005028{
5029 char *prev = *from;
5030
5031 if (prev == start) {
5032 /* We're removing the first value. eat the semicolon, if <next>
5033 * is lower than <end> */
5034 if (next < end)
5035 next++;
5036
5037 while (next < end && HTTP_IS_SPHT(*next))
5038 next++;
5039 }
5040 else {
5041 /* Remove useless spaces before the old delimiter. */
5042 while (HTTP_IS_SPHT(*(prev-1)))
5043 prev--;
5044 *from = prev;
5045
5046 /* copy the delimiter and if possible a space if we're
5047 * not at the end of the line.
5048 */
5049 if (next < end) {
5050 *prev++ = *next++;
5051 if (prev + 1 < next)
5052 *prev++ = ' ';
5053 while (next < end && HTTP_IS_SPHT(*next))
5054 next++;
5055 }
5056 }
5057 memmove(prev, next, end - next);
5058 return (prev - next);
5059}
5060
Christopher Faulet0f226952018-10-22 09:29:56 +02005061
5062/* Formats the start line of the request (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08005063 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Faulet0f226952018-10-22 09:29:56 +02005064 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005065static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Faulet0f226952018-10-22 09:29:56 +02005066{
5067 struct ist dst = ist2(str, 0);
5068
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005069 if (istcat(&dst, htx_sl_req_meth(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005070 goto end;
5071 if (dst.len + 1 > len)
5072 goto end;
5073 dst.ptr[dst.len++] = ' ';
5074
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005075 if (istcat(&dst, htx_sl_req_uri(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005076 goto end;
5077 if (dst.len + 1 > len)
5078 goto end;
5079 dst.ptr[dst.len++] = ' ';
5080
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005081 istcat(&dst, htx_sl_req_vsn(sl), len);
Christopher Faulet0f226952018-10-22 09:29:56 +02005082 end:
5083 return dst.len;
5084}
5085
5086/*
5087 * Print a debug line with a start line.
5088 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005089static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl)
Christopher Faulet0f226952018-10-22 09:29:56 +02005090{
5091 struct session *sess = strm_sess(s);
5092 int max;
5093
5094 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5095 dir,
Willy Tarreau66182592021-12-06 07:01:02 +00005096 objt_conn(sess->origin) ? (unsigned short)__objt_conn(sess->origin)->handle.fd : -1,
5097 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 +02005098
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005099 max = HTX_SL_P1_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005100 UBOUND(max, trash.size - trash.data - 3);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005101 chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005102 trash.area[trash.data++] = ' ';
5103
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005104 max = HTX_SL_P2_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005105 UBOUND(max, trash.size - trash.data - 2);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005106 chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005107 trash.area[trash.data++] = ' ';
5108
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005109 max = HTX_SL_P3_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005110 UBOUND(max, trash.size - trash.data - 1);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005111 chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005112 trash.area[trash.data++] = '\n';
5113
Willy Tarreau2e8ab6b2020-03-14 11:03:20 +01005114 DISGUISE(write(1, trash.area, trash.data));
Christopher Faulet0f226952018-10-22 09:29:56 +02005115}
5116
5117/*
5118 * Print a debug line with a header.
5119 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005120static 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 +02005121{
5122 struct session *sess = strm_sess(s);
5123 int max;
5124
5125 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5126 dir,
Willy Tarreau66182592021-12-06 07:01:02 +00005127 objt_conn(sess->origin) ? (unsigned short)__objt_conn(sess->origin)->handle.fd : -1,
5128 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 +02005129
5130 max = n.len;
5131 UBOUND(max, trash.size - trash.data - 3);
5132 chunk_memcat(&trash, n.ptr, max);
5133 trash.area[trash.data++] = ':';
5134 trash.area[trash.data++] = ' ';
5135
5136 max = v.len;
5137 UBOUND(max, trash.size - trash.data - 1);
5138 chunk_memcat(&trash, v.ptr, max);
5139 trash.area[trash.data++] = '\n';
5140
Willy Tarreau2e8ab6b2020-03-14 11:03:20 +01005141 DISGUISE(write(1, trash.area, trash.data));
Christopher Faulet0f226952018-10-22 09:29:56 +02005142}
5143
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005144/* Allocate a new HTTP transaction for stream <s> unless there is one already.
5145 * In case of allocation failure, everything allocated is freed and NULL is
5146 * returned. Otherwise the new transaction is assigned to the stream and
5147 * returned.
5148 */
5149struct http_txn *http_alloc_txn(struct stream *s)
5150{
5151 struct http_txn *txn = s->txn;
5152
5153 if (txn)
5154 return txn;
5155
5156 txn = pool_alloc(pool_head_http_txn);
5157 if (!txn)
5158 return txn;
5159
5160 s->txn = txn;
5161 return txn;
5162}
5163
5164void http_txn_reset_req(struct http_txn *txn)
5165{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005166 txn->req.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005167 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
5168}
5169
5170void http_txn_reset_res(struct http_txn *txn)
5171{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005172 txn->rsp.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005173 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
5174}
5175
5176/*
Christopher Faulet75f619a2021-03-08 19:12:58 +01005177 * Create and initialize a new HTTP transaction for stream <s>. This should be
5178 * used before processing any new request. It returns the transaction or NLULL
5179 * on error.
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005180 */
Christopher Faulet75f619a2021-03-08 19:12:58 +01005181struct http_txn *http_create_txn(struct stream *s)
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005182{
Christopher Faulet75f619a2021-03-08 19:12:58 +01005183 struct http_txn *txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005184 struct conn_stream *cs = objt_cs(s->si[0].end);
5185
Christopher Faulet75f619a2021-03-08 19:12:58 +01005186 txn = pool_alloc(pool_head_http_txn);
5187 if (!txn)
5188 return NULL;
5189 s->txn = txn;
5190
Christopher Fauletdb7ced02022-06-22 17:12:05 +02005191 txn->meth = HTTP_METH_OTHER;
Christopher Fauletda831fa2020-10-06 17:58:43 +02005192 txn->flags = ((cs && cs->flags & CS_FL_NOT_FIRST) ? TX_NOT_FIRST : 0);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005193 txn->status = -1;
Christopher Faulet5cb513a2020-05-13 17:56:56 +02005194 txn->http_reply = NULL;
Willy Tarreau8b507582020-02-25 09:35:07 +01005195 write_u32(txn->cache_hash, 0);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005196
5197 txn->cookie_first_date = 0;
5198 txn->cookie_last_date = 0;
5199
5200 txn->srv_cookie = NULL;
5201 txn->cli_cookie = NULL;
5202 txn->uri = NULL;
5203
5204 http_txn_reset_req(txn);
5205 http_txn_reset_res(txn);
5206
5207 txn->req.chn = &s->req;
5208 txn->rsp.chn = &s->res;
5209
5210 txn->auth.method = HTTP_AUTH_UNKNOWN;
5211
Aurelien DARRAGON32e8e9b2022-11-18 09:17:29 +01005212 /* here we don't want to re-initialize s->vars_txn and s->vars_reqres
5213 * variable lists, because they were already initialized upon stream
5214 * creation in stream_new(), and thus may already contain some variables
5215 */
Christopher Faulet75f619a2021-03-08 19:12:58 +01005216
5217 return txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005218}
5219
5220/* to be used at the end of a transaction */
Christopher Faulet75f619a2021-03-08 19:12:58 +01005221void http_destroy_txn(struct stream *s)
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005222{
5223 struct http_txn *txn = s->txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005224
5225 /* these ones will have been dynamically allocated */
5226 pool_free(pool_head_requri, txn->uri);
5227 pool_free(pool_head_capture, txn->cli_cookie);
5228 pool_free(pool_head_capture, txn->srv_cookie);
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005229 pool_free(pool_head_uniqueid, s->unique_id.ptr);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005230
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005231 s->unique_id = IST_NULL;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005232 txn->uri = NULL;
5233 txn->srv_cookie = NULL;
5234 txn->cli_cookie = NULL;
5235
Christopher Faulet59399252019-11-07 14:27:52 +01005236 if (!LIST_ISEMPTY(&s->vars_txn.head))
5237 vars_prune(&s->vars_txn, s->sess, s);
5238 if (!LIST_ISEMPTY(&s->vars_reqres.head))
5239 vars_prune(&s->vars_reqres, s->sess, s);
Christopher Faulet75f619a2021-03-08 19:12:58 +01005240
5241 pool_free(pool_head_http_txn, txn);
5242 s->txn = NULL;
Christopher Faulet59399252019-11-07 14:27:52 +01005243}
5244
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005245
5246DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn));
Christopher Faulet0f226952018-10-22 09:29:56 +02005247
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005248__attribute__((constructor))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005249static void __http_protocol_init(void)
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005250{
5251}
5252
5253
5254/*
5255 * Local variables:
5256 * c-indent-level: 8
5257 * c-basic-offset: 8
5258 * End:
5259 */