blob: 6be34bb361209a158b92452b13221eed03c35353 [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>
Willy Tarreauf1d32c42020-06-04 21:07:02 +020019#include <haproxy/channel.h>
Willy Tarreau4aa573d2020-06-04 18:21:56 +020020#include <haproxy/check.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020021#include <haproxy/connection.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020022#include <haproxy/errors.h>
Willy Tarreauc7babd82020-06-04 21:29:29 +020023#include <haproxy/filters.h>
Willy Tarreaucd72d8c2020-06-02 19:11:26 +020024#include <haproxy/http.h>
Willy Tarreauc2b1ff02020-06-04 21:21:03 +020025#include <haproxy/http_ana.h>
Willy Tarreau87735332020-06-04 09:08:41 +020026#include <haproxy/http_htx.h>
Willy Tarreau16f958c2020-06-03 08:44:35 +020027#include <haproxy/htx.h>
Willy Tarreauaeed4a82020-06-04 22:01:04 +020028#include <haproxy/log.h>
Willy Tarreau6131d6a2020-06-02 16:48:09 +020029#include <haproxy/net_helper.h>
Willy Tarreaua264d962020-06-04 22:29:18 +020030#include <haproxy/proxy.h>
Willy Tarreau7cd8b6e2020-06-02 17:32:26 +020031#include <haproxy/regex.h>
Willy Tarreau1e56f922020-06-04 23:20:13 +020032#include <haproxy/server-t.h>
Willy Tarreau2eec9b52020-06-04 19:58:55 +020033#include <haproxy/stats.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020034#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020035#include <haproxy/stream_interface.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020036#include <haproxy/trace.h>
Willy Tarreau8c42b8a2020-06-04 19:27:34 +020037#include <haproxy/uri_auth-t.h>
Willy Tarreaua1718922020-06-04 16:25:31 +020038#include <haproxy/vars.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020039
Christopher Faulete0768eb2018-10-03 16:38:02 +020040
Christopher Fauleteea8fc72019-11-05 16:18:10 +010041#define TRACE_SOURCE &trace_strm
42
Christopher Faulet377c5a52018-10-24 21:21:30 +020043extern const char *stat_status_codes[];
Christopher Fauletf2824e62018-10-01 12:12:37 +020044
Christopher Fauleta8a46e22019-07-16 14:53:09 +020045struct pool_head *pool_head_requri = NULL;
46struct pool_head *pool_head_capture = NULL;
47
48
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020049static void http_end_request(struct stream *s);
50static void http_end_response(struct stream *s);
Christopher Fauletf2824e62018-10-01 12:12:37 +020051
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020052static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr);
53static int http_del_hdr_value(char *start, char *end, char **from, char *next);
54static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len);
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020055static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl);
56static 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 +020057
Christopher Fauletb58f62b2020-01-13 16:40:13 +010058static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020059static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
Christopher Faulet3e964192018-10-24 11:39:23 +020060
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020061static void http_manage_client_side_cookies(struct stream *s, struct channel *req);
62static void http_manage_server_side_cookies(struct stream *s, struct channel *res);
Christopher Fauletfcda7c62018-10-24 11:56:22 +020063
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020064static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend);
65static int http_handle_stats(struct stream *s, struct channel *req);
Christopher Faulet377c5a52018-10-24 21:21:30 +020066
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020067static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg);
68static int http_reply_100_continue(struct stream *s);
Christopher Faulet23a3c792018-11-28 10:01:23 +010069
Christopher Faulete0768eb2018-10-03 16:38:02 +020070/* This stream analyser waits for a complete HTTP request. It returns 1 if the
71 * processing can continue on next analysers, or zero if it either needs more
72 * data or wants to immediately abort the request (eg: timeout, error, ...). It
73 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req.analysers
74 * when it has nothing left to do, and may remove any analyser when it wants to
75 * abort.
76 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020077int http_wait_for_request(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +020078{
Christopher Faulet9768c262018-10-22 09:34:31 +020079
Christopher Faulete0768eb2018-10-03 16:38:02 +020080 /*
Christopher Faulet9768c262018-10-22 09:34:31 +020081 * We will analyze a complete HTTP request to check the its syntax.
Christopher Faulete0768eb2018-10-03 16:38:02 +020082 *
Christopher Faulet9768c262018-10-22 09:34:31 +020083 * Once the start line and all headers are received, we may perform a
84 * capture of the error (if any), and we will set a few fields. We also
85 * check for monitor-uri, logging and finally headers capture.
Christopher Faulete0768eb2018-10-03 16:38:02 +020086 */
Christopher Faulete0768eb2018-10-03 16:38:02 +020087 struct session *sess = s->sess;
88 struct http_txn *txn = s->txn;
89 struct http_msg *msg = &txn->req;
Christopher Faulet9768c262018-10-22 09:34:31 +020090 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +010091 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +020092
Christopher Fauleteea8fc72019-11-05 16:18:10 +010093 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +020094
Christopher Faulet27ba2dc2018-12-05 11:53:24 +010095 htx = htxbuf(&req->buf);
Christopher Faulet9768c262018-10-22 09:34:31 +020096
Willy Tarreau4236f032019-03-05 10:43:32 +010097 /* Parsing errors are caught here */
Christopher Fauletb9a92f32019-09-09 10:15:21 +020098 if (htx->flags & (HTX_FL_PARSING_ERROR|HTX_FL_PROCESSING_ERROR)) {
Willy Tarreau4236f032019-03-05 10:43:32 +010099 stream_inc_http_req_ctr(s);
100 stream_inc_http_err_ctr(s);
101 proxy_inc_fe_req_ctr(sess->fe);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200102 if (htx->flags & HTX_FL_PARSING_ERROR)
103 goto return_bad_req;
104 else
105 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +0100106 }
107
Christopher Faulete0768eb2018-10-03 16:38:02 +0200108 /* we're speaking HTTP here, so let's speak HTTP to the client */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200109 s->srv_error = http_return_srv_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200110
111 /* If there is data available for analysis, log the end of the idle time. */
Christopher Faulet870aad92018-11-29 15:23:46 +0100112 if (c_data(req) && s->logs.t_idle == -1) {
113 const struct cs_info *csinfo = si_get_cs_info(objt_cs(s->si[0].end));
114
115 s->logs.t_idle = ((csinfo)
116 ? csinfo->t_idle
117 : tv_ms_elapsed(&s->logs.tv_accept, &now) - s->logs.t_handshake);
118 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200119
Christopher Faulete0768eb2018-10-03 16:38:02 +0200120 /*
121 * Now we quickly check if we have found a full valid request.
122 * If not so, we check the FD and buffer states before leaving.
123 * A full request is indicated by the fact that we have seen
124 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
125 * requests are checked first. When waiting for a second request
126 * on a keep-alive stream, if we encounter and error, close, t/o,
127 * we note the error in the stream flags but don't set any state.
128 * Since the error will be noted there, it will not be counted by
129 * process_stream() as a frontend error.
130 * Last, we may increase some tracked counters' http request errors on
131 * the cases that are deliberately the client's fault. For instance,
132 * a timeout or connection reset is not counted as an error. However
133 * a bad request is.
134 */
Christopher Faulet29f17582019-05-23 11:03:26 +0200135 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
Christopher Faulet0ef372a2019-04-08 10:57:20 +0200136 if (htx->flags & HTX_FL_UPGRADE)
137 goto failed_keep_alive;
138
Christopher Faulet9768c262018-10-22 09:34:31 +0200139 /* 1: have we encountered a read error ? */
140 if (req->flags & CF_READ_ERROR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200141 if (!(s->flags & SF_ERR_MASK))
142 s->flags |= SF_ERR_CLICL;
143
144 if (txn->flags & TX_WAIT_NEXT_RQ)
145 goto failed_keep_alive;
146
147 if (sess->fe->options & PR_O_IGNORE_PRB)
148 goto failed_keep_alive;
149
Christopher Faulet9768c262018-10-22 09:34:31 +0200150 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200151 stream_inc_http_req_ctr(s);
152 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100153 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200154 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100155 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200156
Christopher Faulet9768c262018-10-22 09:34:31 +0200157 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200158 http_reply_and_close(s, txn->status, NULL);
Christopher Faulet9768c262018-10-22 09:34:31 +0200159 req->analysers &= AN_REQ_FLT_END;
160
Christopher Faulete0768eb2018-10-03 16:38:02 +0200161 if (!(s->flags & SF_FINST_MASK))
162 s->flags |= SF_FINST_R;
163 return 0;
164 }
165
Christopher Faulet9768c262018-10-22 09:34:31 +0200166 /* 2: has the read timeout expired ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200167 else if (req->flags & CF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
168 if (!(s->flags & SF_ERR_MASK))
169 s->flags |= SF_ERR_CLITO;
170
171 if (txn->flags & TX_WAIT_NEXT_RQ)
172 goto failed_keep_alive;
173
174 if (sess->fe->options & PR_O_IGNORE_PRB)
175 goto failed_keep_alive;
176
Christopher Faulet9768c262018-10-22 09:34:31 +0200177 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200178 stream_inc_http_req_ctr(s);
179 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100180 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200181 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100182 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200183
Christopher Faulet9768c262018-10-22 09:34:31 +0200184 txn->status = 408;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200185 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200186 req->analysers &= AN_REQ_FLT_END;
187
Christopher Faulete0768eb2018-10-03 16:38:02 +0200188 if (!(s->flags & SF_FINST_MASK))
189 s->flags |= SF_FINST_R;
190 return 0;
191 }
192
Christopher Faulet9768c262018-10-22 09:34:31 +0200193 /* 3: have we encountered a close ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200194 else if (req->flags & CF_SHUTR) {
195 if (!(s->flags & SF_ERR_MASK))
196 s->flags |= SF_ERR_CLICL;
197
198 if (txn->flags & TX_WAIT_NEXT_RQ)
199 goto failed_keep_alive;
200
201 if (sess->fe->options & PR_O_IGNORE_PRB)
202 goto failed_keep_alive;
203
Christopher Faulete0768eb2018-10-03 16:38:02 +0200204 stream_inc_http_err_ctr(s);
205 stream_inc_http_req_ctr(s);
206 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100207 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200208 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100209 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200210
Christopher Faulet9768c262018-10-22 09:34:31 +0200211 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200212 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200213 req->analysers &= AN_REQ_FLT_END;
214
Christopher Faulete0768eb2018-10-03 16:38:02 +0200215 if (!(s->flags & SF_FINST_MASK))
216 s->flags |= SF_FINST_R;
217 return 0;
218 }
219
220 channel_dont_connect(req);
221 req->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
222 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100223
Christopher Faulet9768c262018-10-22 09:34:31 +0200224 if (sess->listener->options & LI_O_NOQUICKACK && htx_is_not_empty(htx) &&
Christopher Faulete0768eb2018-10-03 16:38:02 +0200225 objt_conn(sess->origin) && conn_ctrl_ready(__objt_conn(sess->origin))) {
226 /* We need more data, we have to re-enable quick-ack in case we
227 * previously disabled it, otherwise we might cause the client
228 * to delay next data.
229 */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100230 conn_set_quickack(objt_conn(sess->origin), 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200231 }
Willy Tarreau1a18b542018-12-11 16:37:42 +0100232
Christopher Faulet47365272018-10-31 17:40:50 +0100233 if ((req->flags & CF_READ_PARTIAL) && (txn->flags & TX_WAIT_NEXT_RQ)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200234 /* If the client starts to talk, let's fall back to
235 * request timeout processing.
236 */
237 txn->flags &= ~TX_WAIT_NEXT_RQ;
238 req->analyse_exp = TICK_ETERNITY;
239 }
240
241 /* just set the request timeout once at the beginning of the request */
242 if (!tick_isset(req->analyse_exp)) {
Christopher Faulet47365272018-10-31 17:40:50 +0100243 if ((txn->flags & TX_WAIT_NEXT_RQ) && tick_isset(s->be->timeout.httpka))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200244 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
245 else
246 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
247 }
248
249 /* we're not ready yet */
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100250 DBG_TRACE_DEVEL("waiting for the request",
251 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200252 return 0;
253
254 failed_keep_alive:
255 /* Here we process low-level errors for keep-alive requests. In
256 * short, if the request is not the first one and it experiences
257 * a timeout, read error or shutdown, we just silently close so
258 * that the client can try again.
259 */
260 txn->status = 0;
261 msg->msg_state = HTTP_MSG_RQBEFORE;
262 req->analysers &= AN_REQ_FLT_END;
263 s->logs.logwait = 0;
264 s->logs.level = 0;
265 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200266 http_reply_and_close(s, txn->status, NULL);
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100267 DBG_TRACE_DEVEL("leaving by closing K/A connection",
268 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200269 return 0;
270 }
271
Christopher Faulet9768c262018-10-22 09:34:31 +0200272 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200273 stream_inc_http_req_ctr(s);
274 proxy_inc_fe_req_ctr(sess->fe); /* one more valid request for this FE */
275
Christopher Faulet9768c262018-10-22 09:34:31 +0200276 /* kill the pending keep-alive timeout */
277 txn->flags &= ~TX_WAIT_NEXT_RQ;
278 req->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200279
Christopher Faulet29f17582019-05-23 11:03:26 +0200280 BUG_ON(htx_get_first_type(htx) != HTX_BLK_REQ_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +0200281 sl = http_get_stline(htx);
Christopher Faulet03599112018-11-27 11:21:21 +0100282
Christopher Faulet9768c262018-10-22 09:34:31 +0200283 /* 0: we might have to print this header in debug mode */
284 if (unlikely((global.mode & MODE_DEBUG) &&
285 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
286 int32_t pos;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200287
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200288 http_debug_stline("clireq", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +0200289
Christopher Fauleta3f15502019-05-13 15:27:23 +0200290 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200291 struct htx_blk *blk = htx_get_blk(htx, pos);
292 enum htx_blk_type type = htx_get_blk_type(blk);
293
294 if (type == HTX_BLK_EOH)
295 break;
296 if (type != HTX_BLK_HDR)
297 continue;
298
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200299 http_debug_hdr("clihdr", s,
300 htx_get_blk_name(htx, blk),
301 htx_get_blk_value(htx, blk));
Christopher Faulet9768c262018-10-22 09:34:31 +0200302 }
303 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200304
305 /*
Christopher Faulet03599112018-11-27 11:21:21 +0100306 * 1: identify the method and the version. Also set HTTP flags
Christopher Faulete0768eb2018-10-03 16:38:02 +0200307 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100308 txn->meth = sl->info.req.meth;
Christopher Faulet03599112018-11-27 11:21:21 +0100309 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +0200310 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +0100311 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +0100312 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +0100313 if (sl->flags & HTX_SL_F_BODYLESS)
314 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200315
316 /* we can make use of server redirect on GET and HEAD */
317 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
318 s->flags |= SF_REDIRECTABLE;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100319 else if (txn->meth == HTTP_METH_OTHER && isteqi(htx_sl_req_meth(sl), ist("PRI"))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200320 /* PRI is reserved for the HTTP/2 preface */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200321 goto return_bad_req;
322 }
323
324 /*
Christopher Faulet6072beb2020-02-18 15:34:58 +0100325 * 2: check if the URI matches the monitor_uri. We have to do this for
326 * every request which gets in, because the monitor-uri is defined by
327 * the frontend. If the monitor-uri starts with a '/', the matching is
328 * done against the request's path. Otherwise, the request's uri is
329 * used. It is a workaround to let HTTP/2 health-checks work as
330 * expected.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200331 */
332 if (unlikely((sess->fe->monitor_uri_len != 0) &&
Christopher Faulet6072beb2020-02-18 15:34:58 +0100333 ((*sess->fe->monitor_uri == '/' && isteq(http_get_path(htx_sl_req_uri(sl)),
334 ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))) ||
335 isteq(htx_sl_req_uri(sl), ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200336 /*
337 * We have found the monitor URI
338 */
339 struct acl_cond *cond;
340
341 s->flags |= SF_MONITOR;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100342 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200343
344 /* Check if we want to fail this monitor request or not */
345 list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) {
346 int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
347
348 ret = acl_pass(ret);
349 if (cond->pol == ACL_COND_UNLESS)
350 ret = !ret;
351
352 if (ret) {
353 /* we fail this request, let's return 503 service unavail */
354 txn->status = 503;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200355 if (!(s->flags & SF_ERR_MASK))
356 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
357 goto return_prx_cond;
358 }
359 }
360
Joseph Herlantc42c0e92018-11-25 10:43:27 -0800361 /* nothing to fail, let's reply normally */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200362 txn->status = 200;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200363 if (!(s->flags & SF_ERR_MASK))
364 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
365 goto return_prx_cond;
366 }
367
368 /*
369 * 3: Maybe we have to copy the original REQURI for the logs ?
370 * Note: we cannot log anymore if the request has been
371 * classified as invalid.
372 */
373 if (unlikely(s->logs.logwait & LW_REQ)) {
374 /* we have a complete HTTP request that we must log */
375 if ((txn->uri = pool_alloc(pool_head_requri)) != NULL) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200376 size_t len;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200377
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200378 len = http_fmt_req_line(sl, txn->uri, global.tune.requri_len - 1);
Christopher Faulet9768c262018-10-22 09:34:31 +0200379 txn->uri[len] = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200380
381 if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT)))
382 s->do_log(s);
383 } else {
384 ha_alert("HTTP logging : out of memory.\n");
385 }
386 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200387
Christopher Faulete0768eb2018-10-03 16:38:02 +0200388 /* if the frontend has "option http-use-proxy-header", we'll check if
389 * we have what looks like a proxied connection instead of a connection,
390 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
391 * Note that this is *not* RFC-compliant, however browsers and proxies
392 * happen to do that despite being non-standard :-(
393 * We consider that a request not beginning with either '/' or '*' is
394 * a proxied connection, which covers both "scheme://location" and
395 * CONNECT ip:port.
396 */
397 if ((sess->fe->options2 & PR_O2_USE_PXHDR) &&
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100398 *HTX_SL_REQ_UPTR(sl) != '/' && *HTX_SL_REQ_UPTR(sl) != '*')
Christopher Faulete0768eb2018-10-03 16:38:02 +0200399 txn->flags |= TX_USE_PX_CONN;
400
Christopher Faulete0768eb2018-10-03 16:38:02 +0200401 /* 5: we may need to capture headers */
402 if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200403 http_capture_headers(htx, s->req_cap, sess->fe->req_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200404
Christopher Faulete0768eb2018-10-03 16:38:02 +0200405 /* we may have to wait for the request's body */
Christopher Faulet9768c262018-10-22 09:34:31 +0200406 if (s->be->options & PR_O_WREQ_BODY)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200407 req->analysers |= AN_REQ_HTTP_BODY;
408
409 /*
410 * RFC7234#4:
411 * A cache MUST write through requests with methods
412 * that are unsafe (Section 4.2.1 of [RFC7231]) to
413 * the origin server; i.e., a cache is not allowed
414 * to generate a reply to such a request before
415 * having forwarded the request and having received
416 * a corresponding response.
417 *
418 * RFC7231#4.2.1:
419 * Of the request methods defined by this
420 * specification, the GET, HEAD, OPTIONS, and TRACE
421 * methods are defined to be safe.
422 */
423 if (likely(txn->meth == HTTP_METH_GET ||
424 txn->meth == HTTP_METH_HEAD ||
425 txn->meth == HTTP_METH_OPTIONS ||
426 txn->meth == HTTP_METH_TRACE))
427 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
428
429 /* end of job, return OK */
430 req->analysers &= ~an_bit;
431 req->analyse_exp = TICK_ETERNITY;
Christopher Faulet9768c262018-10-22 09:34:31 +0200432
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100433 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200434 return 1;
435
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200436 return_int_err:
437 txn->status = 500;
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200438 if (!(s->flags & SF_ERR_MASK))
439 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100440 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200441 if (sess->listener->counters)
Christopher Fauletb8a53712019-12-16 11:29:38 +0100442 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200443 goto return_prx_cond;
444
Christopher Faulete0768eb2018-10-03 16:38:02 +0200445 return_bad_req:
Christopher Faulet9768c262018-10-22 09:34:31 +0200446 txn->status = 400;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100447 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200448 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100449 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200450 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200451
452 return_prx_cond:
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200453 http_reply_and_close(s, txn->status, http_error_message(s));
454
Christopher Faulete0768eb2018-10-03 16:38:02 +0200455 if (!(s->flags & SF_ERR_MASK))
456 s->flags |= SF_ERR_PRXCOND;
457 if (!(s->flags & SF_FINST_MASK))
458 s->flags |= SF_FINST_R;
459
460 req->analysers &= AN_REQ_FLT_END;
461 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100462 DBG_TRACE_DEVEL("leaving on error",
463 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200464 return 0;
465}
466
467
468/* This stream analyser runs all HTTP request processing which is common to
469 * frontends and backends, which means blocking ACLs, filters, connection-close,
470 * reqadd, stats and redirects. This is performed for the designated proxy.
471 * It returns 1 if the processing can continue on next analysers, or zero if it
472 * either needs more data or wants to immediately abort the request (eg: deny,
473 * error, ...).
474 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200475int http_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200476{
477 struct session *sess = s->sess;
478 struct http_txn *txn = s->txn;
479 struct http_msg *msg = &txn->req;
Christopher Fauletff2759f2018-10-24 11:13:16 +0200480 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200481 struct redirect_rule *rule;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200482 enum rule_result verdict;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200483 struct connection *conn = objt_conn(sess->origin);
484
485 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
486 /* we need more data */
487 goto return_prx_yield;
488 }
489
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100490 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200491
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100492 htx = htxbuf(&req->buf);
Christopher Fauletff2759f2018-10-24 11:13:16 +0200493
Christopher Faulet1907ccc2019-04-29 13:12:02 +0200494 /* just in case we have some per-backend tracking. Only called the first
495 * execution of the analyser. */
496 if (!s->current_rule || s->current_rule_list != &px->http_req_rules)
497 stream_inc_be_http_req_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200498
499 /* evaluate http-request rules */
500 if (!LIST_ISEMPTY(&px->http_req_rules)) {
Christopher Fauletb58f62b2020-01-13 16:40:13 +0100501 verdict = http_req_get_intercept_rule(px, &px->http_req_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200502
503 switch (verdict) {
504 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
505 goto return_prx_yield;
506
507 case HTTP_RULE_RES_CONT:
508 case HTTP_RULE_RES_STOP: /* nothing to do */
509 break;
510
511 case HTTP_RULE_RES_DENY: /* deny or tarpit */
512 if (txn->flags & TX_CLTARPIT)
513 goto tarpit;
514 goto deny;
515
516 case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */
517 goto return_prx_cond;
518
519 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
520 goto done;
521
522 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
523 goto return_bad_req;
Christopher Faulet3a26bee2019-12-16 12:47:40 +0100524
525 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
526 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200527 }
528 }
529
530 if (conn && (conn->flags & CO_FL_EARLY_DATA) &&
Olivier Houchard220a26c2020-01-23 14:57:36 +0100531 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_SSL_WAIT_HS))) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200532 struct http_hdr_ctx ctx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200533
Christopher Fauletff2759f2018-10-24 11:13:16 +0200534 ctx.blk = NULL;
535 if (!http_find_header(htx, ist("Early-Data"), &ctx, 0)) {
536 if (unlikely(!http_add_header(htx, ist("Early-Data"), ist("1"))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100537 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200538 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200539 }
540
541 /* OK at this stage, we know that the request was accepted according to
542 * the http-request rules, we can check for the stats. Note that the
543 * URI is detected *before* the req* rules in order not to be affected
544 * by a possible reqrep, while they are processed *after* so that a
545 * reqdeny can still block them. This clearly needs to change in 1.6!
546 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200547 if (!s->target && http_stats_check_uri(s, txn, px)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200548 s->target = &http_stats_applet.obj_type;
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100549 if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200550 s->logs.tv_request = now;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200551 if (!(s->flags & SF_ERR_MASK))
552 s->flags |= SF_ERR_RESOURCE;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100553 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200554 }
555
556 /* parse the whole stats request and extract the relevant information */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200557 http_handle_stats(s, req);
Christopher Fauletb58f62b2020-01-13 16:40:13 +0100558 verdict = http_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200559 /* not all actions implemented: deny, allow, auth */
560
561 if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */
562 goto deny;
563
564 if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */
565 goto return_prx_cond;
Christopher Faulet3a26bee2019-12-16 12:47:40 +0100566
567 if (verdict == HTTP_RULE_RES_BADREQ) /* failed with a bad request */
568 goto return_bad_req;
569
570 if (verdict == HTTP_RULE_RES_ERROR) /* failed with a bad request */
571 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200572 }
573
Christopher Faulet2571bc62019-03-01 11:44:26 +0100574 /* Proceed with the applets now. */
575 if (unlikely(objt_applet(s->target))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200576 if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
Olivier Houcharda798bf52019-03-08 18:52:00 +0100577 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200578
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200579 if (http_handle_expect_hdr(s, htx, msg) == -1)
Christopher Fauletb8a53712019-12-16 11:29:38 +0100580 goto return_int_err;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100581
Christopher Faulete0768eb2018-10-03 16:38:02 +0200582 if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is
583 s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy
584 if (!(s->flags & SF_FINST_MASK))
585 s->flags |= SF_FINST_R;
586
587 /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */
588 req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END);
589 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
590 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100591
592 req->flags |= CF_SEND_DONTWAIT;
593 s->flags |= SF_ASSIGNED;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200594 goto done;
595 }
596
597 /* check whether we have some ACLs set to redirect this request */
598 list_for_each_entry(rule, &px->redirect_rules, list) {
599 if (rule->cond) {
600 int ret;
601
602 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
603 ret = acl_pass(ret);
604 if (rule->cond->pol == ACL_COND_UNLESS)
605 ret = !ret;
606 if (!ret)
607 continue;
608 }
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200609 if (!http_apply_redirect_rule(rule, s, txn))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100610 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200611 goto done;
612 }
613
614 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
615 * If this happens, then the data will not come immediately, so we must
616 * send all what we have without waiting. Note that due to the small gain
617 * in waiting for the body of the request, it's easier to simply put the
618 * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
619 * itself once used.
620 */
621 req->flags |= CF_SEND_DONTWAIT;
622
623 done: /* done with this analyser, continue with next ones that the calling
624 * points will have set, if any.
625 */
626 req->analyse_exp = TICK_ETERNITY;
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +0500627 done_without_exp: /* done with this analyser, but don't reset the analyse_exp. */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200628 req->analysers &= ~an_bit;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100629 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200630 return 1;
631
632 tarpit:
633 /* Allow cookie logging
634 */
635 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200636 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200637
638 /* When a connection is tarpitted, we use the tarpit timeout,
639 * which may be the same as the connect timeout if unspecified.
640 * If unset, then set it to zero because we really want it to
641 * eventually expire. We build the tarpit as an analyser.
642 */
Christopher Faulet202c6ce2019-01-07 14:57:35 +0100643 channel_htx_erase(&s->req, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200644
645 /* wipe the request out so that we can drop the connection early
646 * if the client closes first.
647 */
648 channel_dont_connect(req);
649
Christopher Faulete0768eb2018-10-03 16:38:02 +0200650 req->analysers &= AN_REQ_FLT_END; /* remove switching rules etc... */
651 req->analysers |= AN_REQ_HTTP_TARPIT;
652 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
653 if (!req->analyse_exp)
654 req->analyse_exp = tick_add(now_ms, 0);
655 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100656 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100657 if (s->flags & SF_BE_ASSIGNED)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100658 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200659 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100660 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200661 goto done_without_exp;
662
663 deny: /* this request was blocked (denied) */
664
665 /* Allow cookie logging
666 */
667 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200668 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200669
Christopher Faulete0768eb2018-10-03 16:38:02 +0200670 s->logs.tv_request = now;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200671 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100672 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100673 if (s->flags & SF_BE_ASSIGNED)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100674 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200675 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100676 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100677 goto return_prx_err;
678
679 return_int_err:
680 txn->status = 500;
681 if (!(s->flags & SF_ERR_MASK))
682 s->flags |= SF_ERR_INTERNAL;
683 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100684 if (s->flags & SF_BE_ASSIGNED)
685 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100686 if (sess->listener->counters)
687 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
688 goto return_prx_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200689
690 return_bad_req:
Christopher Faulete0768eb2018-10-03 16:38:02 +0200691 txn->status = 400;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100692 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200693 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100694 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100695 /* fall through */
696
697 return_prx_err:
698 http_reply_and_close(s, txn->status, http_error_message(s));
699 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200700
701 return_prx_cond:
702 if (!(s->flags & SF_ERR_MASK))
703 s->flags |= SF_ERR_PRXCOND;
704 if (!(s->flags & SF_FINST_MASK))
705 s->flags |= SF_FINST_R;
706
707 req->analysers &= AN_REQ_FLT_END;
708 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100709 DBG_TRACE_DEVEL("leaving on error",
710 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200711 return 0;
712
713 return_prx_yield:
714 channel_dont_connect(req);
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100715 DBG_TRACE_DEVEL("waiting for more data",
716 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200717 return 0;
718}
719
720/* This function performs all the processing enabled for the current request.
721 * It returns 1 if the processing can continue on next analysers, or zero if it
722 * needs more data, encounters an error, or wants to immediately abort the
723 * request. It relies on buffers flags, and updates s->req.analysers.
724 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200725int http_process_request(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200726{
727 struct session *sess = s->sess;
728 struct http_txn *txn = s->txn;
729 struct http_msg *msg = &txn->req;
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200730 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200731 struct connection *cli_conn = objt_conn(strm_sess(s)->origin);
732
733 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
734 /* we need more data */
735 channel_dont_connect(req);
736 return 0;
737 }
738
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100739 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200740
741 /*
742 * Right now, we know that we have processed the entire headers
743 * and that unwanted requests have been filtered out. We can do
744 * whatever we want with the remaining request. Also, now we
745 * may have separate values for ->fe, ->be.
746 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100747 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200748
749 /*
750 * If HTTP PROXY is set we simply get remote server address parsing
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200751 * incoming request.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200752 */
753 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100754 struct htx_sl *sl;
755 struct ist uri, path;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200756
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200757 if (!sockaddr_alloc(&s->target_addr)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200758 if (!(s->flags & SF_ERR_MASK))
759 s->flags |= SF_ERR_RESOURCE;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100760 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200761 }
Christopher Faulet297fbb42019-05-13 14:41:27 +0200762 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100763 uri = htx_sl_req_uri(sl);
764 path = http_get_path(uri);
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200765
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200766 if (url2sa(uri.ptr, uri.len - path.len, s->target_addr, NULL) == -1)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200767 goto return_bad_req;
768
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200769 s->target = &s->be->obj_type;
770 s->flags |= SF_ADDR_SET | SF_ASSIGNED;
771
Christopher Faulete0768eb2018-10-03 16:38:02 +0200772 /* if the path was found, we have to remove everything between
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200773 * uri.ptr and path.ptr (excluded). If it was not found, we need
774 * to replace from all the uri by a single "/".
775 *
776 * Instead of rewritting the whole start line, we just update
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100777 * the star-line URI. Some space will be lost but it should be
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200778 * insignificant.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200779 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100780 istcpy(&uri, (path.len ? path : ist("/")), uri.len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200781 }
782
783 /*
784 * 7: Now we can work with the cookies.
785 * Note that doing so might move headers in the request, but
786 * the fields will stay coherent and the URI will not move.
787 * This should only be performed in the backend.
788 */
789 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200790 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200791
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100792 /* 8: Generate unique ID if a "unique-id-format" is defined.
793 *
794 * A unique ID is generated even when it is not sent to ensure that the ID can make use of
795 * fetches only available in the HTTP request processing stage.
796 */
797 if (!LIST_ISEMPTY(&sess->fe->format_unique_id)) {
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100798 struct ist unique_id = stream_generate_unique_id(s, &sess->fe->format_unique_id);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200799
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100800 if (!isttest(unique_id)) {
Christopher Fauletb8a53712019-12-16 11:29:38 +0100801 if (!(s->flags & SF_ERR_MASK))
802 s->flags |= SF_ERR_RESOURCE;
803 goto return_int_err;
804 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200805
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100806 /* send unique ID if a "unique-id-header" is defined */
Tim Duesterhus0643b0e2020-03-05 17:56:35 +0100807 if (isttest(sess->fe->header_unique_id) &&
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100808 unlikely(!http_add_header(htx, sess->fe->header_unique_id, s->unique_id)))
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100809 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200810 }
811
812 /*
813 * 9: add X-Forwarded-For if either the frontend or the backend
814 * asks for it.
815 */
816 if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200817 struct http_hdr_ctx ctx = { .blk = NULL };
818 struct ist hdr = ist2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name,
819 s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len);
820
Christopher Faulete0768eb2018-10-03 16:38:02 +0200821 if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200822 http_find_header(htx, hdr, &ctx, 0)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200823 /* The header is set to be added only if none is present
824 * and we found it, so don't do anything.
825 */
826 }
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200827 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200828 /* Add an X-Forwarded-For header unless the source IP is
829 * in the 'except' network range.
830 */
831 if ((!sess->fe->except_mask.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200832 (((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr & sess->fe->except_mask.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200833 != sess->fe->except_net.s_addr) &&
834 (!s->be->except_mask.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200835 (((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr & s->be->except_mask.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200836 != s->be->except_net.s_addr)) {
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200837 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->src)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200838
839 /* Note: we rely on the backend to get the header name to be used for
840 * x-forwarded-for, because the header is really meant for the backends.
841 * However, if the backend did not specify any option, we have to rely
842 * on the frontend's header name.
843 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200844 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
845 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100846 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200847 }
848 }
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200849 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET6) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200850 /* FIXME: for the sake of completeness, we should also support
851 * 'except' here, although it is mostly useless in this case.
852 */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200853 char pn[INET6_ADDRSTRLEN];
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200854
Christopher Faulete0768eb2018-10-03 16:38:02 +0200855 inet_ntop(AF_INET6,
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200856 (const void *)&((struct sockaddr_in6 *)(cli_conn->src))->sin6_addr,
Christopher Faulete0768eb2018-10-03 16:38:02 +0200857 pn, sizeof(pn));
858
859 /* Note: we rely on the backend to get the header name to be used for
860 * x-forwarded-for, because the header is really meant for the backends.
861 * However, if the backend did not specify any option, we have to rely
862 * on the frontend's header name.
863 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200864 chunk_printf(&trash, "%s", pn);
865 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100866 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200867 }
868 }
869
870 /*
871 * 10: add X-Original-To if either the frontend or the backend
872 * asks for it.
873 */
874 if ((sess->fe->options | s->be->options) & PR_O_ORGTO) {
875
876 /* FIXME: don't know if IPv6 can handle that case too. */
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200877 if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET && conn_get_dst(cli_conn)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200878 /* Add an X-Original-To header unless the destination IP is
879 * in the 'except' network range.
880 */
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200881 if (cli_conn->dst->ss_family == AF_INET &&
Christopher Faulete0768eb2018-10-03 16:38:02 +0200882 ((!sess->fe->except_mask_to.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200883 (((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr & sess->fe->except_mask_to.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200884 != sess->fe->except_to.s_addr) &&
885 (!s->be->except_mask_to.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200886 (((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200887 != s->be->except_to.s_addr))) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200888 struct ist hdr;
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200889 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200890
891 /* Note: we rely on the backend to get the header name to be used for
892 * x-original-to, because the header is really meant for the backends.
893 * However, if the backend did not specify any option, we have to rely
894 * on the frontend's header name.
895 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200896 if (s->be->orgto_hdr_len)
897 hdr = ist2(s->be->orgto_hdr_name, s->be->orgto_hdr_len);
898 else
899 hdr = ist2(sess->fe->orgto_hdr_name, sess->fe->orgto_hdr_len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200900
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200901 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
902 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100903 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200904 }
905 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200906 }
907
Christopher Faulete0768eb2018-10-03 16:38:02 +0200908 /* If we have no server assigned yet and we're balancing on url_param
909 * with a POST request, we may be interested in checking the body for
910 * that parameter. This will be done in another analyser.
911 */
912 if (!(s->flags & (SF_ASSIGNED|SF_DIRECT)) &&
Willy Tarreau089eaa02019-01-14 15:17:46 +0100913 s->txn->meth == HTTP_METH_POST &&
914 (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200915 channel_dont_connect(req);
916 req->analysers |= AN_REQ_HTTP_BODY;
917 }
918
919 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
920 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau1a18b542018-12-11 16:37:42 +0100921
Christopher Faulete0768eb2018-10-03 16:38:02 +0200922 /* We expect some data from the client. Unless we know for sure
923 * we already have a full request, we have to re-enable quick-ack
924 * in case we previously disabled it, otherwise we might cause
925 * the client to delay further data.
926 */
927 if ((sess->listener->options & LI_O_NOQUICKACK) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200928 (htx_get_tail_type(htx) != HTX_BLK_EOM))
Willy Tarreau1a18b542018-12-11 16:37:42 +0100929 conn_set_quickack(cli_conn, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200930
931 /*************************************************************
932 * OK, that's finished for the headers. We have done what we *
933 * could. Let's switch to the DATA state. *
934 ************************************************************/
935 req->analyse_exp = TICK_ETERNITY;
936 req->analysers &= ~an_bit;
937
938 s->logs.tv_request = now;
939 /* OK let's go on with the BODY now */
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100940 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200941 return 1;
942
Christopher Fauletb8a53712019-12-16 11:29:38 +0100943 return_int_err:
944 txn->status = 500;
945 if (!(s->flags & SF_ERR_MASK))
946 s->flags |= SF_ERR_INTERNAL;
947 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100948 if (s->flags & SF_BE_ASSIGNED)
Christopher Fauletbe20cf32020-01-24 11:41:38 +0100949 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100950 if (sess->listener->counters)
951 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
952 goto return_prx_cond;
953
Christopher Faulete0768eb2018-10-03 16:38:02 +0200954 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200955 txn->status = 400;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100956 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200957 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100958 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100959 /* fall through */
960
961 return_prx_cond:
962 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200963
964 if (!(s->flags & SF_ERR_MASK))
965 s->flags |= SF_ERR_PRXCOND;
966 if (!(s->flags & SF_FINST_MASK))
967 s->flags |= SF_FINST_R;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100968
969 req->analysers &= AN_REQ_FLT_END;
970 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100971 DBG_TRACE_DEVEL("leaving on error",
972 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200973 return 0;
974}
975
976/* This function is an analyser which processes the HTTP tarpit. It always
977 * returns zero, at the beginning because it prevents any other processing
978 * from occurring, and at the end because it terminates the request.
979 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200980int http_process_tarpit(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200981{
982 struct http_txn *txn = s->txn;
983
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100984 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, &txn->req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200985 /* This connection is being tarpitted. The CLIENT side has
986 * already set the connect expiration date to the right
987 * timeout. We just have to check that the client is still
988 * there and that the timeout has not expired.
989 */
990 channel_dont_connect(req);
991 if ((req->flags & (CF_SHUTR|CF_READ_ERROR)) == 0 &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100992 !tick_is_expired(req->analyse_exp, now_ms)) {
993 DBG_TRACE_DEVEL("waiting for tarpit timeout expiry",
994 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200995 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100996 }
997
Christopher Faulete0768eb2018-10-03 16:38:02 +0200998
999 /* We will set the queue timer to the time spent, just for
1000 * logging purposes. We fake a 500 server error, so that the
1001 * attacker will not suspect his connection has been tarpitted.
1002 * It will not cause trouble to the logs because we can exclude
1003 * the tarpitted connections by filtering on the 'PT' status flags.
1004 */
1005 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1006
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02001007 http_reply_and_close(s, txn->status, (!(req->flags & CF_READ_ERROR) ? http_error_message(s) : NULL));
Christopher Faulet5cb513a2020-05-13 17:56:56 +02001008
1009 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001010 req->analysers &= AN_REQ_FLT_END;
1011 req->analyse_exp = TICK_ETERNITY;
1012
1013 if (!(s->flags & SF_ERR_MASK))
1014 s->flags |= SF_ERR_PRXCOND;
1015 if (!(s->flags & SF_FINST_MASK))
1016 s->flags |= SF_FINST_T;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001017
1018 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001019 return 0;
1020}
1021
1022/* This function is an analyser which waits for the HTTP request body. It waits
1023 * for either the buffer to be full, or the full advertised contents to have
1024 * reached the buffer. It must only be called after the standard HTTP request
1025 * processing has occurred, because it expects the request to be parsed and will
1026 * look for the Expect header. It may send a 100-Continue interim response. It
1027 * takes in input any state starting from HTTP_MSG_BODY and leaves with one of
1028 * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it
1029 * needs to read more data, or 1 once it has completed its analysis.
1030 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001031int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001032{
1033 struct session *sess = s->sess;
1034 struct http_txn *txn = s->txn;
1035 struct http_msg *msg = &s->txn->req;
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001036 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001037
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001038 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001039
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001040 htx = htxbuf(&req->buf);
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001041
Willy Tarreau4236f032019-03-05 10:43:32 +01001042 if (htx->flags & HTX_FL_PARSING_ERROR)
1043 goto return_bad_req;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001044 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1045 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +01001046
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001047 if (msg->msg_state < HTTP_MSG_BODY)
1048 goto missing_data;
Christopher Faulet9768c262018-10-22 09:34:31 +02001049
Christopher Faulete0768eb2018-10-03 16:38:02 +02001050 /* We have to parse the HTTP request body to find any required data.
1051 * "balance url_param check_post" should have been the only way to get
1052 * into this. We were brought here after HTTP header analysis, so all
1053 * related structures are ready.
1054 */
1055
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001056 if (msg->msg_state < HTTP_MSG_DATA) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001057 if (http_handle_expect_hdr(s, htx, msg) == -1)
Christopher Fauletb8a53712019-12-16 11:29:38 +01001058 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001059 }
1060
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001061 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001062
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001063 /* Now we're in HTTP_MSG_DATA. We just need to know if all data have
1064 * been received or if the buffer is full.
Christopher Faulete0768eb2018-10-03 16:38:02 +02001065 */
Christopher Faulet54b5e212019-06-04 10:08:28 +02001066 if (htx_get_tail_type(htx) > HTX_BLK_DATA ||
Christopher Fauletdcd8c5e2019-01-21 11:24:38 +01001067 channel_htx_full(req, htx, global.tune.maxrewrite))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001068 goto http_end;
1069
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001070 missing_data:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001071 if ((req->flags & CF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
1072 txn->status = 408;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001073 if (!(s->flags & SF_ERR_MASK))
1074 s->flags |= SF_ERR_CLITO;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001075 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
1076 if (sess->listener->counters)
1077 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
1078 goto return_prx_cond;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001079 }
1080
1081 /* we get here if we need to wait for more data */
1082 if (!(req->flags & (CF_SHUTR | CF_READ_ERROR))) {
1083 /* Not enough data. We'll re-use the http-request
1084 * timeout here. Ideally, we should set the timeout
1085 * relative to the accept() date. We just set the
1086 * request timeout once at the beginning of the
1087 * request.
1088 */
1089 channel_dont_connect(req);
1090 if (!tick_isset(req->analyse_exp))
1091 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001092 DBG_TRACE_DEVEL("waiting for more data",
1093 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001094 return 0;
1095 }
1096
1097 http_end:
1098 /* The situation will not evolve, so let's give up on the analysis. */
1099 s->logs.tv_request = now; /* update the request timer to reflect full request */
1100 req->analysers &= ~an_bit;
1101 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001102 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001103 return 1;
1104
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001105 return_int_err:
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001106 txn->status = 500;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001107 if (!(s->flags & SF_ERR_MASK))
1108 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001109 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001110 if (s->flags & SF_BE_ASSIGNED)
Christopher Fauletbe20cf32020-01-24 11:41:38 +01001111 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001112 if (sess->listener->counters)
1113 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
1114 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001115
Christopher Faulete0768eb2018-10-03 16:38:02 +02001116 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001117 txn->status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001118 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
1119 if (sess->listener->counters)
1120 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
1121 /* fall through */
1122
1123 return_prx_cond:
1124 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001125
1126 if (!(s->flags & SF_ERR_MASK))
1127 s->flags |= SF_ERR_PRXCOND;
1128 if (!(s->flags & SF_FINST_MASK))
Christopher Fauletb8a53712019-12-16 11:29:38 +01001129 s->flags |= (msg->msg_state < HTTP_MSG_DATA ? SF_FINST_R : SF_FINST_D);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001130
Christopher Faulete0768eb2018-10-03 16:38:02 +02001131 req->analysers &= AN_REQ_FLT_END;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001132 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001133 DBG_TRACE_DEVEL("leaving on error",
1134 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001135 return 0;
1136}
1137
1138/* This function is an analyser which forwards request body (including chunk
1139 * sizes if any). It is called as soon as we must forward, even if we forward
1140 * zero byte. The only situation where it must not be called is when we're in
1141 * tunnel mode and we want to forward till the close. It's used both to forward
1142 * remaining data and to resync after end of body. It expects the msg_state to
1143 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
1144 * read more data, or 1 once we can go on with next request or end the stream.
1145 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
1146 * bytes of pending data + the headers if not already done.
1147 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001148int http_request_forward_body(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001149{
1150 struct session *sess = s->sess;
1151 struct http_txn *txn = s->txn;
Christopher Faulet9768c262018-10-22 09:34:31 +02001152 struct http_msg *msg = &txn->req;
1153 struct htx *htx;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001154 short status = 0;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001155 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001156
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001157 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001158
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001159 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001160
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001161 if (htx->flags & HTX_FL_PARSING_ERROR)
1162 goto return_bad_req;
1163 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1164 goto return_int_err;
1165
Christopher Faulete0768eb2018-10-03 16:38:02 +02001166 if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
1167 ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) {
1168 /* Output closed while we were sending data. We must abort and
1169 * wake the other side up.
1170 */
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001171
Olivier Houchard29cac3c2019-07-12 15:48:58 +02001172 /* Don't abort yet if we had L7 retries activated and it
1173 * was a write error, we may recover.
1174 */
1175 if (!(req->flags & (CF_READ_ERROR | CF_READ_TIMEOUT)) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001176 (s->si[1].flags & SI_FL_L7_RETRY)) {
1177 DBG_TRACE_DEVEL("leaving on L7 retry",
1178 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Olivier Houchard29cac3c2019-07-12 15:48:58 +02001179 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001180 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001181 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001182 http_end_request(s);
1183 http_end_response(s);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001184 DBG_TRACE_DEVEL("leaving on error",
1185 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001186 return 1;
1187 }
1188
1189 /* Note that we don't have to send 100-continue back because we don't
1190 * need the data to complete our job, and it's up to the server to
1191 * decide whether to return 100, 417 or anything else in return of
1192 * an "Expect: 100-continue" header.
1193 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001194 if (msg->msg_state == HTTP_MSG_BODY)
1195 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001196
Christopher Faulete0768eb2018-10-03 16:38:02 +02001197 /* in most states, we should abort in case of early close */
1198 channel_auto_close(req);
1199
1200 if (req->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01001201 if (req->to_forward == CHN_INFINITE_FORWARD) {
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001202 if (req->flags & CF_EOI)
1203 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01001204 }
1205 else {
1206 /* We can't process the buffer's contents yet */
1207 req->flags |= CF_WAKE_WRITE;
1208 goto missing_data_or_waiting;
1209 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001210 }
1211
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001212 if (msg->msg_state >= HTTP_MSG_ENDING)
1213 goto ending;
1214
1215 if (txn->meth == HTTP_METH_CONNECT) {
1216 msg->msg_state = HTTP_MSG_ENDING;
1217 goto ending;
1218 }
1219
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001220 /* Forward input data. We get it by removing all outgoing data not
1221 * forwarded yet from HTX data size. If there are some data filters, we
1222 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02001223 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001224 if (HAS_REQ_DATA_FILTERS(s)) {
1225 ret = flt_http_payload(s, msg, htx->data);
1226 if (ret < 0)
1227 goto return_bad_req;
Christopher Faulet421e7692019-06-13 11:16:45 +02001228 c_adv(req, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001229 }
1230 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02001231 c_adv(req, htx->data - co_data(req));
Christopher Faulet66af0b22019-03-22 14:54:52 +01001232 if (msg->flags & HTTP_MSGF_XFER_LEN)
1233 channel_htx_forward_forever(req, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001234 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001235
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001236 if (htx->data != co_data(req))
1237 goto missing_data_or_waiting;
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001238
Christopher Faulet9768c262018-10-22 09:34:31 +02001239 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001240 * in HTTP_MSG_ENDING state. Then if all data was marked to be
1241 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02001242 */
1243 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
1244 goto missing_data_or_waiting;
1245
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001246 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02001247
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001248 ending:
1249 /* other states, ENDING...TUNNEL */
1250 if (msg->msg_state >= HTTP_MSG_DONE)
1251 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001252
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001253 if (HAS_REQ_DATA_FILTERS(s)) {
1254 ret = flt_http_end(s, msg);
1255 if (ret <= 0) {
1256 if (!ret)
1257 goto missing_data_or_waiting;
1258 goto return_bad_req;
1259 }
1260 }
1261
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001262 if (txn->meth == HTTP_METH_CONNECT)
1263 msg->msg_state = HTTP_MSG_TUNNEL;
1264 else {
1265 msg->msg_state = HTTP_MSG_DONE;
1266 req->to_forward = 0;
1267 }
1268
1269 done:
1270 /* we don't want to forward closes on DONE except in tunnel mode. */
1271 if (!(txn->flags & TX_CON_WANT_TUN))
1272 channel_dont_close(req);
1273
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001274 http_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001275 if (!(req->analysers & an_bit)) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001276 http_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001277 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
1278 if (req->flags & CF_SHUTW) {
1279 /* request errors are most likely due to the
1280 * server aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01001281 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001282 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001283 goto return_bad_req;
1284 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001285 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001286 return 1;
1287 }
1288
1289 /* If "option abortonclose" is set on the backend, we want to monitor
1290 * the client's connection and forward any shutdown notification to the
1291 * server, which will decide whether to close or to go on processing the
1292 * request. We only do that in tunnel mode, and not in other modes since
1293 * it can be abused to exhaust source ports. */
Christopher Faulet769d0e92019-03-22 14:23:18 +01001294 if (s->be->options & PR_O_ABRT_CLOSE) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001295 channel_auto_read(req);
Christopher Fauletc41547b2019-07-16 14:32:23 +02001296 if ((req->flags & (CF_SHUTR|CF_READ_NULL)) && !(txn->flags & TX_CON_WANT_TUN))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001297 s->si[1].flags |= SI_FL_NOLINGER;
1298 channel_auto_close(req);
1299 }
1300 else if (s->txn->meth == HTTP_METH_POST) {
1301 /* POST requests may require to read extra CRLF sent by broken
1302 * browsers and which could cause an RST to be sent upon close
1303 * on some systems (eg: Linux). */
1304 channel_auto_read(req);
1305 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001306 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
1307 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001308 return 0;
1309
1310 missing_data_or_waiting:
1311 /* stop waiting for data if the input is closed before the end */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001312 if (msg->msg_state < HTTP_MSG_ENDING && req->flags & CF_SHUTR)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001313 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001314
1315 waiting:
1316 /* waiting for the last bits to leave the buffer */
1317 if (req->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001318 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001319
1320 /* When TE: chunked is used, we need to get there again to parse remaining
1321 * chunks even if the client has closed, so we don't want to set CF_DONTCLOSE.
1322 * And when content-length is used, we never want to let the possible
1323 * shutdown be forwarded to the other side, as the state machine will
1324 * take care of it once the client responds. It's also important to
1325 * prevent TIME_WAITs from accumulating on the backend side, and for
1326 * HTTP/2 where the last frame comes with a shutdown.
1327 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001328 if (msg->flags & HTTP_MSGF_XFER_LEN)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001329 channel_dont_close(req);
1330
1331 /* We know that more data are expected, but we couldn't send more that
1332 * what we did. So we always set the CF_EXPECT_MORE flag so that the
1333 * system knows it must not set a PUSH on this first part. Interactive
1334 * modes are already handled by the stream sock layer. We must not do
1335 * this in content-length mode because it could present the MSG_MORE
1336 * flag with the last block of forwarded data, which would cause an
1337 * additional delay to be observed by the receiver.
1338 */
1339 if (msg->flags & HTTP_MSGF_TE_CHNK)
1340 req->flags |= CF_EXPECT_MORE;
1341
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001342 DBG_TRACE_DEVEL("waiting for more data to forward",
1343 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001344 return 0;
1345
Christopher Faulet93e02d82019-03-08 14:18:50 +01001346 return_cli_abort:
1347 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1348 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001349 if (sess->listener->counters)
1350 _HA_ATOMIC_ADD(&sess->listener->counters->cli_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001351 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01001352 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001353 if (!(s->flags & SF_ERR_MASK))
1354 s->flags |= SF_ERR_CLICL;
1355 status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001356 goto return_prx_cond;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001357
1358 return_srv_abort:
1359 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
1360 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001361 if (sess->listener->counters)
1362 _HA_ATOMIC_ADD(&sess->listener->counters->srv_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001363 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01001364 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.srv_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001365 if (!(s->flags & SF_ERR_MASK))
1366 s->flags |= SF_ERR_SRVCL;
1367 status = 502;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001368 goto return_prx_cond;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001369
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001370 return_int_err:
1371 if (!(s->flags & SF_ERR_MASK))
1372 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001373 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001374 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001375 if (sess->listener->counters)
1376 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001377 if (objt_server(s->target))
1378 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001379 status = 500;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001380 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001381
Christopher Faulet93e02d82019-03-08 14:18:50 +01001382 return_bad_req:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001383 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001384 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001385 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001386 status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001387 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001388
Christopher Fauletb8a53712019-12-16 11:29:38 +01001389 return_prx_cond:
Christopher Faulet9768c262018-10-22 09:34:31 +02001390 if (txn->status > 0) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001391 /* Note: we don't send any error if some data were already sent */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001392 http_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001393 } else {
Christopher Faulet93e02d82019-03-08 14:18:50 +01001394 txn->status = status;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001395 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001396 }
1397 req->analysers &= AN_REQ_FLT_END;
1398 s->res.analysers &= AN_RES_FLT_END; /* we're in data phase, we want to abort both directions */
Christopher Fauletb8a53712019-12-16 11:29:38 +01001399 if (!(s->flags & SF_ERR_MASK))
1400 s->flags |= SF_ERR_PRXCOND;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001401 if (!(s->flags & SF_FINST_MASK))
1402 s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001403 DBG_TRACE_DEVEL("leaving on error ",
1404 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001405 return 0;
1406}
1407
Olivier Houcharda254a372019-04-05 15:30:12 +02001408/* Reset the stream and the backend stream_interface to a situation suitable for attemption connection */
1409/* Returns 0 if we can attempt to retry, -1 otherwise */
1410static __inline int do_l7_retry(struct stream *s, struct stream_interface *si)
1411{
1412 struct channel *req, *res;
1413 int co_data;
1414
1415 si->conn_retries--;
1416 if (si->conn_retries < 0)
1417 return -1;
1418
Willy Tarreau223995e2019-05-04 10:38:31 +02001419 if (objt_server(s->target))
1420 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.retries, 1);
1421 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
1422
Olivier Houcharda254a372019-04-05 15:30:12 +02001423 req = &s->req;
1424 res = &s->res;
1425 /* Remove any write error from the request, and read error from the response */
1426 req->flags &= ~(CF_WRITE_ERROR | CF_WRITE_TIMEOUT | CF_SHUTW | CF_SHUTW_NOW);
1427 res->flags &= ~(CF_READ_ERROR | CF_READ_TIMEOUT | CF_SHUTR | CF_EOI | CF_READ_NULL | CF_SHUTR_NOW);
1428 res->analysers = 0;
1429 si->flags &= ~(SI_FL_ERR | SI_FL_EXP | SI_FL_RXBLK_SHUT);
Olivier Houchard8cabc972020-05-12 22:18:14 +02001430 s->flags &= ~SF_ADDR_SET;
Olivier Houchard4bd58672019-07-12 16:16:59 +02001431 stream_choose_redispatch(s);
Olivier Houcharda254a372019-04-05 15:30:12 +02001432 si->exp = TICK_ETERNITY;
1433 res->rex = TICK_ETERNITY;
1434 res->to_forward = 0;
1435 res->analyse_exp = TICK_ETERNITY;
1436 res->total = 0;
Olivier Houchard4bd58672019-07-12 16:16:59 +02001437 s->flags &= ~(SF_ERR_SRVTO | SF_ERR_SRVCL);
Olivier Houcharda254a372019-04-05 15:30:12 +02001438 si_release_endpoint(&s->si[1]);
1439 b_free(&req->buf);
1440 /* Swap the L7 buffer with the channel buffer */
1441 /* We know we stored the co_data as b_data, so get it there */
1442 co_data = b_data(&si->l7_buffer);
1443 b_set_data(&si->l7_buffer, b_size(&si->l7_buffer));
1444 b_xfer(&req->buf, &si->l7_buffer, b_data(&si->l7_buffer));
1445
1446 co_set_data(req, co_data);
1447 b_reset(&res->buf);
1448 co_set_data(res, 0);
1449 return 0;
1450}
1451
Christopher Faulete0768eb2018-10-03 16:38:02 +02001452/* This stream analyser waits for a complete HTTP response. It returns 1 if the
1453 * processing can continue on next analysers, or zero if it either needs more
1454 * data or wants to immediately abort the response (eg: timeout, error, ...). It
1455 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
1456 * when it has nothing left to do, and may remove any analyser when it wants to
1457 * abort.
1458 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001459int http_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001460{
Christopher Faulet9768c262018-10-22 09:34:31 +02001461 /*
1462 * We will analyze a complete HTTP response to check the its syntax.
1463 *
1464 * Once the start line and all headers are received, we may perform a
1465 * capture of the error (if any), and we will set a few fields. We also
1466 * logging and finally headers capture.
1467 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001468 struct session *sess = s->sess;
1469 struct http_txn *txn = s->txn;
1470 struct http_msg *msg = &txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02001471 struct htx *htx;
Olivier Houcharda254a372019-04-05 15:30:12 +02001472 struct stream_interface *si_b = &s->si[1];
Christopher Faulet61608322018-11-23 16:23:45 +01001473 struct connection *srv_conn;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001474 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001475 int n;
1476
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001477 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001478
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001479 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001480
Willy Tarreau4236f032019-03-05 10:43:32 +01001481 /* Parsing errors are caught here */
1482 if (htx->flags & HTX_FL_PARSING_ERROR)
1483 goto return_bad_res;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001484 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1485 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +01001486
Christopher Faulete0768eb2018-10-03 16:38:02 +02001487 /*
1488 * Now we quickly check if we have found a full valid response.
1489 * If not so, we check the FD and buffer states before leaving.
1490 * A full response is indicated by the fact that we have seen
1491 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
1492 * responses are checked first.
1493 *
1494 * Depending on whether the client is still there or not, we
1495 * may send an error response back or not. Note that normally
1496 * we should only check for HTTP status there, and check I/O
1497 * errors somewhere else.
1498 */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001499 next_one:
Christopher Faulet29f17582019-05-23 11:03:26 +02001500 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001501 /* 1: have we encountered a read error ? */
1502 if (rep->flags & CF_READ_ERROR) {
Olivier Houchard865d8392019-05-03 22:46:27 +02001503 struct connection *conn = NULL;
1504
Olivier Houchard865d8392019-05-03 22:46:27 +02001505 if (objt_cs(s->si[1].end))
1506 conn = objt_cs(s->si[1].end)->conn;
1507
1508 if (si_b->flags & SI_FL_L7_RETRY &&
1509 (!conn || conn->err_code != CO_ER_SSL_EARLY_FAILED)) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001510 /* If we arrive here, then CF_READ_ERROR was
1511 * set by si_cs_recv() because we matched a
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001512 * status, otherwise it would have removed
Olivier Houcharda254a372019-04-05 15:30:12 +02001513 * the SI_FL_L7_RETRY flag, so it's ok not
1514 * to check s->be->retry_type.
1515 */
1516 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1517 return 0;
1518 }
1519
Olivier Houchard6db16992019-05-17 15:40:49 +02001520 if (txn->flags & TX_NOT_FIRST)
1521 goto abort_keep_alive;
1522
Olivier Houcharda798bf52019-03-08 18:52:00 +01001523 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001524 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001525 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001526 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001527 }
1528
Christopher Faulete0768eb2018-10-03 16:38:02 +02001529 rep->analysers &= AN_RES_FLT_END;
1530 txn->status = 502;
1531
1532 /* Check to see if the server refused the early data.
1533 * If so, just send a 425
1534 */
Olivier Houchard865d8392019-05-03 22:46:27 +02001535 if (conn->err_code == CO_ER_SSL_EARLY_FAILED) {
1536 if ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001537 (si_b->flags & SI_FL_L7_RETRY) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001538 do_l7_retry(s, si_b) == 0) {
1539 DBG_TRACE_DEVEL("leaving on L7 retry",
1540 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houchard865d8392019-05-03 22:46:27 +02001541 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001542 }
Olivier Houchard865d8392019-05-03 22:46:27 +02001543 txn->status = 425;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001544 }
1545
1546 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001547 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001548
1549 if (!(s->flags & SF_ERR_MASK))
1550 s->flags |= SF_ERR_SRVCL;
1551 if (!(s->flags & SF_FINST_MASK))
1552 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001553 DBG_TRACE_DEVEL("leaving on error",
1554 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001555 return 0;
1556 }
1557
Christopher Faulet9768c262018-10-22 09:34:31 +02001558 /* 2: read timeout : return a 504 to the client. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001559 else if (rep->flags & CF_READ_TIMEOUT) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001560 if ((si_b->flags & SI_FL_L7_RETRY) &&
1561 (s->be->retry_type & PR_RE_TIMEOUT)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001562 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1563 DBG_TRACE_DEVEL("leaving on L7 retry",
1564 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001565 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001566 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001567 }
Olivier Houcharda798bf52019-03-08 18:52:00 +01001568 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001569 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001570 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001571 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001572 }
1573
Christopher Faulete0768eb2018-10-03 16:38:02 +02001574 rep->analysers &= AN_RES_FLT_END;
1575 txn->status = 504;
1576 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001577 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001578
1579 if (!(s->flags & SF_ERR_MASK))
1580 s->flags |= SF_ERR_SRVTO;
1581 if (!(s->flags & SF_FINST_MASK))
1582 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001583 DBG_TRACE_DEVEL("leaving on error",
1584 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001585 return 0;
1586 }
1587
Christopher Faulet9768c262018-10-22 09:34:31 +02001588 /* 3: client abort with an abortonclose */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001589 else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001590 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1591 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001592 if (sess->listener->counters)
1593 _HA_ATOMIC_ADD(&sess->listener->counters->cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001594 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001595 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001596
1597 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001598 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001599 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001600
1601 if (!(s->flags & SF_ERR_MASK))
1602 s->flags |= SF_ERR_CLICL;
1603 if (!(s->flags & SF_FINST_MASK))
1604 s->flags |= SF_FINST_H;
1605
1606 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001607 DBG_TRACE_DEVEL("leaving on error",
1608 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001609 return 0;
1610 }
1611
Christopher Faulet9768c262018-10-22 09:34:31 +02001612 /* 4: close from server, capture the response if the server has started to respond */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001613 else if (rep->flags & CF_SHUTR) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001614 if ((si_b->flags & SI_FL_L7_RETRY) &&
1615 (s->be->retry_type & PR_RE_DISCONNECTED)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001616 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1617 DBG_TRACE_DEVEL("leaving on L7 retry",
1618 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001619 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001620 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001621 }
1622
Olivier Houchard6db16992019-05-17 15:40:49 +02001623 if (txn->flags & TX_NOT_FIRST)
1624 goto abort_keep_alive;
1625
Olivier Houcharda798bf52019-03-08 18:52:00 +01001626 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001627 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001628 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001629 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001630 }
1631
Christopher Faulete0768eb2018-10-03 16:38:02 +02001632 rep->analysers &= AN_RES_FLT_END;
1633 txn->status = 502;
1634 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001635 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001636
1637 if (!(s->flags & SF_ERR_MASK))
1638 s->flags |= SF_ERR_SRVCL;
1639 if (!(s->flags & SF_FINST_MASK))
1640 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001641 DBG_TRACE_DEVEL("leaving on error",
1642 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001643 return 0;
1644 }
1645
Christopher Faulet9768c262018-10-22 09:34:31 +02001646 /* 5: write error to client (we don't send any message then) */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001647 else if (rep->flags & CF_WRITE_ERROR) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001648 if (txn->flags & TX_NOT_FIRST)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001649 goto abort_keep_alive;
1650
Olivier Houcharda798bf52019-03-08 18:52:00 +01001651 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001652 if (objt_server(s->target))
1653 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001654 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001655
1656 if (!(s->flags & SF_ERR_MASK))
1657 s->flags |= SF_ERR_CLICL;
1658 if (!(s->flags & SF_FINST_MASK))
1659 s->flags |= SF_FINST_H;
1660
1661 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001662 DBG_TRACE_DEVEL("leaving on error",
1663 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001664 return 0;
1665 }
1666
1667 channel_dont_close(rep);
1668 rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001669 DBG_TRACE_DEVEL("waiting for more data",
1670 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001671 return 0;
1672 }
1673
1674 /* More interesting part now : we know that we have a complete
1675 * response which at least looks like HTTP. We have an indicator
1676 * of each header's length, so we can parse them quickly.
1677 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001678 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulet29f17582019-05-23 11:03:26 +02001679 BUG_ON(htx_get_first_type(htx) != HTX_BLK_RES_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +02001680 sl = http_get_stline(htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001681
Christopher Faulet9768c262018-10-22 09:34:31 +02001682 /* 0: we might have to print this header in debug mode */
1683 if (unlikely((global.mode & MODE_DEBUG) &&
1684 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
1685 int32_t pos;
1686
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001687 http_debug_stline("srvrep", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +02001688
Christopher Fauleta3f15502019-05-13 15:27:23 +02001689 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001690 struct htx_blk *blk = htx_get_blk(htx, pos);
1691 enum htx_blk_type type = htx_get_blk_type(blk);
1692
1693 if (type == HTX_BLK_EOH)
1694 break;
1695 if (type != HTX_BLK_HDR)
1696 continue;
1697
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001698 http_debug_hdr("srvhdr", s,
1699 htx_get_blk_name(htx, blk),
1700 htx_get_blk_value(htx, blk));
Christopher Faulet9768c262018-10-22 09:34:31 +02001701 }
1702 }
1703
Christopher Faulet03599112018-11-27 11:21:21 +01001704 /* 1: get the status code and the version. Also set HTTP flags */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001705 txn->status = sl->info.res.status;
Christopher Faulet03599112018-11-27 11:21:21 +01001706 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +02001707 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +01001708 if (sl->flags & HTX_SL_F_XFER_LEN) {
1709 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +01001710 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +01001711 if (sl->flags & HTX_SL_F_BODYLESS)
1712 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulet03599112018-11-27 11:21:21 +01001713 }
Christopher Faulet9768c262018-10-22 09:34:31 +02001714
1715 n = txn->status / 100;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001716 if (n < 1 || n > 5)
1717 n = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001718
Christopher Faulete0768eb2018-10-03 16:38:02 +02001719 /* when the client triggers a 4xx from the server, it's most often due
1720 * to a missing object or permission. These events should be tracked
1721 * because if they happen often, it may indicate a brute force or a
1722 * vulnerability scan.
1723 */
1724 if (n == 4)
1725 stream_inc_http_err_ctr(s);
1726
Marcin Deranek3c27dda2020-05-15 18:32:51 +02001727 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001728 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.p.http.rsp[n], 1);
Marcin Deranek3c27dda2020-05-15 18:32:51 +02001729 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.p.http.cum_req, 1);
1730 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001731
Christopher Faulete0768eb2018-10-03 16:38:02 +02001732 /* Adjust server's health based on status code. Note: status codes 501
1733 * and 505 are triggered on demand by client request, so we must not
1734 * count them as server failures.
1735 */
1736 if (objt_server(s->target)) {
1737 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001738 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001739 else
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001740 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001741 }
1742
1743 /*
1744 * We may be facing a 100-continue response, or any other informational
1745 * 1xx response which is non-final, in which case this is not the right
1746 * response, and we're waiting for the next one. Let's allow this response
1747 * to go to the client and wait for the next one. There's an exception for
1748 * 101 which is used later in the code to switch protocols.
1749 */
1750 if (txn->status < 200 &&
1751 (txn->status == 100 || txn->status >= 102)) {
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001752 FLT_STRM_CB(s, flt_http_reset(s, msg));
Christopher Faulet421e7692019-06-13 11:16:45 +02001753 htx->first = channel_htx_fwd_headers(rep, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001754 msg->msg_state = HTTP_MSG_RPBEFORE;
Christopher Faulet3499f622019-09-03 15:23:54 +02001755 msg->flags = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001756 txn->status = 0;
1757 s->logs.t_data = -1; /* was not a response yet */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001758 goto next_one;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001759 }
1760
1761 /*
1762 * 2: check for cacheability.
1763 */
1764
1765 switch (txn->status) {
1766 case 200:
1767 case 203:
1768 case 204:
1769 case 206:
1770 case 300:
1771 case 301:
1772 case 404:
1773 case 405:
1774 case 410:
1775 case 414:
1776 case 501:
1777 break;
1778 default:
1779 /* RFC7231#6.1:
1780 * Responses with status codes that are defined as
1781 * cacheable by default (e.g., 200, 203, 204, 206,
1782 * 300, 301, 404, 405, 410, 414, and 501 in this
1783 * specification) can be reused by a cache with
1784 * heuristic expiration unless otherwise indicated
1785 * by the method definition or explicit cache
1786 * controls [RFC7234]; all other status codes are
1787 * not cacheable by default.
1788 */
1789 txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
1790 break;
1791 }
1792
1793 /*
1794 * 3: we may need to capture headers
1795 */
1796 s->logs.logwait &= ~LW_RESP;
1797 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001798 http_capture_headers(htx, s->res_cap, sess->fe->rsp_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001799
Christopher Faulet9768c262018-10-22 09:34:31 +02001800 /* Skip parsing if no content length is possible. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001801 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
1802 txn->status == 101)) {
1803 /* Either we've established an explicit tunnel, or we're
1804 * switching the protocol. In both cases, we're very unlikely
1805 * to understand the next protocols. We have to switch to tunnel
1806 * mode, so that we transfer the request and responses then let
1807 * this protocol pass unmodified. When we later implement specific
1808 * parsers for such protocols, we'll want to check the Upgrade
1809 * header which contains information about that protocol for
1810 * responses with status 101 (eg: see RFC2817 about TLS).
1811 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02001812 txn->flags |= TX_CON_WANT_TUN;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001813 }
1814
Christopher Faulet61608322018-11-23 16:23:45 +01001815 /* check for NTML authentication headers in 401 (WWW-Authenticate) and
1816 * 407 (Proxy-Authenticate) responses and set the connection to private
1817 */
1818 srv_conn = cs_conn(objt_cs(s->si[1].end));
1819 if (srv_conn) {
1820 struct ist hdr;
1821 struct http_hdr_ctx ctx;
1822
1823 if (txn->status == 401)
1824 hdr = ist("WWW-Authenticate");
1825 else if (txn->status == 407)
1826 hdr = ist("Proxy-Authenticate");
1827 else
1828 goto end;
1829
1830 ctx.blk = NULL;
1831 while (http_find_header(htx, hdr, &ctx, 0)) {
Willy Tarreauf1dcced2020-05-07 19:27:02 +02001832 /* If www-authenticate contains "Negotiate", "Nego2", or "NTLM",
1833 * possibly followed by blanks and a base64 string, the connection
1834 * is private. Since it's a mess to deal with, we only check for
1835 * values starting with "NTLM" or "Nego". Note that often multiple
1836 * headers are sent by the server there.
1837 */
1838 if ((ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "Nego", 4) == 0) ||
Willy Tarreau49a1d282020-05-07 19:10:15 +02001839 (ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "NTLM", 4) == 0)) {
Olivier Houchard250031e2019-05-29 15:01:50 +02001840 sess->flags |= SESS_FL_PREFER_LAST;
Christopher Faulet61608322018-11-23 16:23:45 +01001841 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreauf1dcced2020-05-07 19:27:02 +02001842 break;
Olivier Houchard250031e2019-05-29 15:01:50 +02001843 }
Christopher Faulet61608322018-11-23 16:23:45 +01001844 }
1845 }
1846
1847 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001848 /* we want to have the response time before we start processing it */
1849 s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
1850
1851 /* end of job, return OK */
1852 rep->analysers &= ~an_bit;
1853 rep->analyse_exp = TICK_ETERNITY;
1854 channel_auto_close(rep);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001855 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001856 return 1;
1857
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001858 return_int_err:
Christopher Fauletcff0f732019-12-16 16:13:44 +01001859 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001860 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001861 if (sess->listener->counters)
1862 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001863 if (objt_server(s->target))
1864 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001865 txn->status = 500;
1866 if (!(s->flags & SF_ERR_MASK))
1867 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001868 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001869
1870 return_bad_res:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001871 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulet47365272018-10-31 17:40:50 +01001872 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001873 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001874 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
Christopher Faulet47365272018-10-31 17:40:50 +01001875 }
Olivier Houcharde3249a92019-05-03 23:01:47 +02001876 if ((s->be->retry_type & PR_RE_JUNK_REQUEST) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001877 (si_b->flags & SI_FL_L7_RETRY) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001878 do_l7_retry(s, si_b) == 0) {
1879 DBG_TRACE_DEVEL("leaving on L7 retry",
1880 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharde3249a92019-05-03 23:01:47 +02001881 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001882 }
Christopher Faulet47365272018-10-31 17:40:50 +01001883 txn->status = 502;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001884 /* fall through */
1885
Christopher Fauletb8a53712019-12-16 11:29:38 +01001886 return_prx_cond:
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001887 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet47365272018-10-31 17:40:50 +01001888
1889 if (!(s->flags & SF_ERR_MASK))
1890 s->flags |= SF_ERR_PRXCOND;
1891 if (!(s->flags & SF_FINST_MASK))
1892 s->flags |= SF_FINST_H;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001893
1894 s->si[1].flags |= SI_FL_NOLINGER;
1895 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete58c0002020-03-02 16:21:01 +01001896 s->req.analysers &= AN_REQ_FLT_END;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001897 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001898 DBG_TRACE_DEVEL("leaving on error",
1899 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulet47365272018-10-31 17:40:50 +01001900 return 0;
1901
Christopher Faulete0768eb2018-10-03 16:38:02 +02001902 abort_keep_alive:
1903 /* A keep-alive request to the server failed on a network error.
1904 * The client is required to retry. We need to close without returning
1905 * any other information so that the client retries.
1906 */
1907 txn->status = 0;
1908 rep->analysers &= AN_RES_FLT_END;
1909 s->req.analysers &= AN_REQ_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001910 s->logs.logwait = 0;
1911 s->logs.level = 0;
1912 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001913 http_reply_and_close(s, txn->status, NULL);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001914 DBG_TRACE_DEVEL("leaving by closing K/A connection",
1915 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001916 return 0;
1917}
1918
1919/* This function performs all the processing enabled for the current response.
1920 * It normally returns 1 unless it wants to break. It relies on buffers flags,
1921 * and updates s->res.analysers. It might make sense to explode it into several
1922 * other functions. It works like process_request (see indications above).
1923 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001924int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001925{
1926 struct session *sess = s->sess;
1927 struct http_txn *txn = s->txn;
1928 struct http_msg *msg = &txn->rsp;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001929 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001930 struct proxy *cur_proxy;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001931 enum rule_result ret = HTTP_RULE_RES_CONT;
1932
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001933 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
1934 return 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001935
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001936 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001937
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001938 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001939
1940 /* The stats applet needs to adjust the Connection header but we don't
1941 * apply any filter there.
1942 */
1943 if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
1944 rep->analysers &= ~an_bit;
1945 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001946 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001947 }
1948
1949 /*
1950 * We will have to evaluate the filters.
1951 * As opposed to version 1.2, now they will be evaluated in the
1952 * filters order and not in the header order. This means that
1953 * each filter has to be validated among all headers.
1954 *
1955 * Filters are tried with ->be first, then with ->fe if it is
1956 * different from ->be.
1957 *
1958 * Maybe we are in resume condiion. In this case I choose the
1959 * "struct proxy" which contains the rule list matching the resume
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001960 * pointer. If none of these "struct proxy" match, I initialise
Christopher Faulete0768eb2018-10-03 16:38:02 +02001961 * the process with the first one.
1962 *
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001963 * In fact, I check only correspondence between the current list
Christopher Faulete0768eb2018-10-03 16:38:02 +02001964 * pointer and the ->fe rule list. If it doesn't match, I initialize
1965 * the loop with the ->be.
1966 */
1967 if (s->current_rule_list == &sess->fe->http_res_rules)
1968 cur_proxy = sess->fe;
1969 else
1970 cur_proxy = s->be;
1971 while (1) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001972 /* evaluate http-response rules */
1973 if (ret == HTTP_RULE_RES_CONT) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001974 ret = http_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001975
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001976 switch (ret) {
1977 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
1978 goto return_prx_yield;
1979
1980 case HTTP_RULE_RES_CONT:
1981 case HTTP_RULE_RES_STOP: /* nothing to do */
1982 break;
1983
1984 case HTTP_RULE_RES_DENY: /* deny or tarpit */
1985 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001986
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001987 case HTTP_RULE_RES_ABRT: /* abort request, response already sent */
1988 goto return_prx_cond;
1989
1990 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
Christopher Fauletb8a53712019-12-16 11:29:38 +01001991 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001992
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001993 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
1994 goto return_bad_res;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001995
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001996 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
1997 goto return_int_err;
1998 }
1999
2000 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002001
Christopher Faulete0768eb2018-10-03 16:38:02 +02002002 /* check whether we're already working on the frontend */
2003 if (cur_proxy == sess->fe)
2004 break;
2005 cur_proxy = sess->fe;
2006 }
2007
Christopher Faulete0768eb2018-10-03 16:38:02 +02002008 /* OK that's all we can do for 1xx responses */
2009 if (unlikely(txn->status < 200 && txn->status != 101))
Christopher Fauletf2824e62018-10-01 12:12:37 +02002010 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002011
2012 /*
2013 * Now check for a server cookie.
2014 */
2015 if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002016 http_manage_server_side_cookies(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002017
2018 /*
2019 * Check for cache-control or pragma headers if required.
2020 */
2021 if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002022 http_check_response_for_cacheability(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002023
2024 /*
2025 * Add server cookie in the response if needed
2026 */
2027 if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
2028 !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
2029 (!(s->flags & SF_DIRECT) ||
2030 ((s->be->cookie_maxidle || txn->cookie_last_date) &&
2031 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
2032 (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
2033 (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
2034 (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
2035 !(s->flags & SF_IGNORE_PRST)) {
2036 /* the server is known, it's not the one the client requested, or the
2037 * cookie's last seen date needs to be refreshed. We have to
2038 * insert a set-cookie here, except if we want to insert only on POST
2039 * requests and this one isn't. Note that servers which don't have cookies
2040 * (eg: some backup servers) will return a full cookie removal request.
2041 */
2042 if (!objt_server(s->target)->cookie) {
2043 chunk_printf(&trash,
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002044 "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
Christopher Faulete0768eb2018-10-03 16:38:02 +02002045 s->be->cookie_name);
2046 }
2047 else {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002048 chunk_printf(&trash, "%s=%s", s->be->cookie_name, objt_server(s->target)->cookie);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002049
2050 if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
2051 /* emit last_date, which is mandatory */
2052 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2053 s30tob64((date.tv_sec+3) >> 2,
2054 trash.area + trash.data);
2055 trash.data += 5;
2056
2057 if (s->be->cookie_maxlife) {
2058 /* emit first_date, which is either the original one or
2059 * the current date.
2060 */
2061 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2062 s30tob64(txn->cookie_first_date ?
2063 txn->cookie_first_date >> 2 :
2064 (date.tv_sec+3) >> 2,
2065 trash.area + trash.data);
2066 trash.data += 5;
2067 }
2068 }
2069 chunk_appendf(&trash, "; path=/");
2070 }
2071
2072 if (s->be->cookie_domain)
2073 chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
2074
2075 if (s->be->ck_opts & PR_CK_HTTPONLY)
2076 chunk_appendf(&trash, "; HttpOnly");
2077
2078 if (s->be->ck_opts & PR_CK_SECURE)
2079 chunk_appendf(&trash, "; Secure");
2080
Christopher Faulet2f533902020-01-21 11:06:48 +01002081 if (s->be->cookie_attrs)
2082 chunk_appendf(&trash, "; %s", s->be->cookie_attrs);
2083
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002084 if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +01002085 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002086
2087 txn->flags &= ~TX_SCK_MASK;
2088 if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
2089 /* the server did not change, only the date was updated */
2090 txn->flags |= TX_SCK_UPDATED;
2091 else
2092 txn->flags |= TX_SCK_INSERTED;
2093
2094 /* Here, we will tell an eventual cache on the client side that we don't
2095 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
2096 * Some caches understand the correct form: 'no-cache="set-cookie"', but
2097 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
2098 */
2099 if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
2100
2101 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
2102
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002103 if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private"))))
Christopher Fauletb8a53712019-12-16 11:29:38 +01002104 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002105 }
2106 }
2107
2108 /*
2109 * Check if result will be cacheable with a cookie.
2110 * We'll block the response if security checks have caught
2111 * nasty things such as a cacheable cookie.
2112 */
2113 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
2114 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
2115 (s->be->options & PR_O_CHK_CACHE)) {
2116 /* we're in presence of a cacheable response containing
2117 * a set-cookie header. We'll block it as requested by
2118 * the 'checkcache' option, and send an alert.
2119 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002120 ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
2121 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
2122 send_log(s->be, LOG_ALERT,
2123 "Blocking cacheable cookie in response from instance %s, server %s.\n",
2124 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
Christopher Fauletb8a53712019-12-16 11:29:38 +01002125 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002126 }
2127
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002128 end:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002129 /*
2130 * Evaluate after-response rules before forwarding the response. rules
2131 * from the backend are evaluated first, then one from the frontend if
2132 * it differs.
2133 */
2134 if (!http_eval_after_res_rules(s))
2135 goto return_int_err;
2136
Christopher Faulete0768eb2018-10-03 16:38:02 +02002137 /* Always enter in the body analyzer */
2138 rep->analysers &= ~AN_RES_FLT_XFER_DATA;
2139 rep->analysers |= AN_RES_HTTP_XFER_BODY;
2140
2141 /* if the user wants to log as soon as possible, without counting
2142 * bytes from the server, then this is the right moment. We have
2143 * to temporarily assign bytes_out to log what we currently have.
2144 */
2145 if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
2146 s->logs.t_close = s->logs.t_data; /* to get a valid end date */
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002147 s->logs.bytes_out = htx->data;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002148 s->do_log(s);
2149 s->logs.bytes_out = 0;
2150 }
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002151
Christopher Fauletb8a53712019-12-16 11:29:38 +01002152 done:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002153 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002154 rep->analysers &= ~an_bit;
2155 rep->analyse_exp = TICK_ETERNITY;
2156 return 1;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002157
Christopher Fauletb8a53712019-12-16 11:29:38 +01002158 deny:
Christopher Fauletb8a53712019-12-16 11:29:38 +01002159 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
Christopher Fauleta08546b2019-12-16 16:07:34 +01002160 _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002161 if (sess->listener->counters)
2162 _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
Christopher Fauleta08546b2019-12-16 16:07:34 +01002163 if (objt_server(s->target))
2164 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.denied_resp, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002165 goto return_prx_err;
2166
2167 return_int_err:
2168 txn->status = 500;
2169 if (!(s->flags & SF_ERR_MASK))
2170 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletcff0f732019-12-16 16:13:44 +01002171 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002172 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
2173 if (objt_server(s->target))
2174 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002175 if (objt_server(s->target))
2176 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002177 goto return_prx_err;
2178
2179 return_bad_res:
2180 txn->status = 502;
Christopher Fauleta20a6532020-02-05 10:16:41 +01002181 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
2182 if (objt_server(s->target)) {
2183 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
2184 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2185 }
Christopher Fauletb8a53712019-12-16 11:29:38 +01002186 /* fall through */
2187
2188 return_prx_err:
2189 http_reply_and_close(s, txn->status, http_error_message(s));
2190 /* fall through */
2191
2192 return_prx_cond:
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002193 s->logs.t_data = -1; /* was not a valid response */
2194 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002195
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002196 if (!(s->flags & SF_ERR_MASK))
2197 s->flags |= SF_ERR_PRXCOND;
2198 if (!(s->flags & SF_FINST_MASK))
2199 s->flags |= SF_FINST_H;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002200
Christopher Faulete58c0002020-03-02 16:21:01 +01002201 rep->analysers &= AN_RES_FLT_END;
2202 s->req.analysers &= AN_REQ_FLT_END;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002203 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002204 DBG_TRACE_DEVEL("leaving on error",
2205 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002206 return 0;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002207
2208 return_prx_yield:
2209 channel_dont_close(rep);
2210 DBG_TRACE_DEVEL("waiting for more data",
2211 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2212 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002213}
2214
2215/* This function is an analyser which forwards response body (including chunk
2216 * sizes if any). It is called as soon as we must forward, even if we forward
2217 * zero byte. The only situation where it must not be called is when we're in
2218 * tunnel mode and we want to forward till the close. It's used both to forward
2219 * remaining data and to resync after end of body. It expects the msg_state to
2220 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
2221 * read more data, or 1 once we can go on with next request or end the stream.
2222 *
2223 * It is capable of compressing response data both in content-length mode and
2224 * in chunked mode. The state machines follows different flows depending on
2225 * whether content-length and chunked modes are used, since there are no
2226 * trailers in content-length :
2227 *
2228 * chk-mode cl-mode
2229 * ,----- BODY -----.
2230 * / \
2231 * V size > 0 V chk-mode
2232 * .--> SIZE -------------> DATA -------------> CRLF
2233 * | | size == 0 | last byte |
2234 * | v final crlf v inspected |
2235 * | TRAILERS -----------> DONE |
2236 * | |
2237 * `----------------------------------------------'
2238 *
2239 * Compression only happens in the DATA state, and must be flushed in final
2240 * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
2241 * is performed at once on final states for all bytes parsed, or when leaving
2242 * on missing data.
2243 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002244int http_response_forward_body(struct stream *s, struct channel *res, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02002245{
2246 struct session *sess = s->sess;
2247 struct http_txn *txn = s->txn;
2248 struct http_msg *msg = &s->txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02002249 struct htx *htx;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002250 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002251
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002252 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002253
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002254 htx = htxbuf(&res->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002255
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002256 if (htx->flags & HTX_FL_PARSING_ERROR)
2257 goto return_bad_res;
2258 if (htx->flags & HTX_FL_PROCESSING_ERROR)
2259 goto return_int_err;
2260
Christopher Faulete0768eb2018-10-03 16:38:02 +02002261 if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
Christopher Fauletf2824e62018-10-01 12:12:37 +02002262 ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002263 /* Output closed while we were sending data. We must abort and
2264 * wake the other side up.
2265 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002266 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002267 http_end_response(s);
2268 http_end_request(s);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002269 DBG_TRACE_DEVEL("leaving on error",
2270 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002271 return 1;
2272 }
2273
Christopher Faulet9768c262018-10-22 09:34:31 +02002274 if (msg->msg_state == HTTP_MSG_BODY)
2275 msg->msg_state = HTTP_MSG_DATA;
2276
Christopher Faulete0768eb2018-10-03 16:38:02 +02002277 /* in most states, we should abort in case of early close */
2278 channel_auto_close(res);
2279
Christopher Faulete0768eb2018-10-03 16:38:02 +02002280 if (res->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01002281 if (res->to_forward == CHN_INFINITE_FORWARD) {
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002282 if (res->flags & CF_EOI)
2283 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01002284 }
2285 else {
2286 /* We can't process the buffer's contents yet */
2287 res->flags |= CF_WAKE_WRITE;
2288 goto missing_data_or_waiting;
2289 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002290 }
2291
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002292 if (msg->msg_state >= HTTP_MSG_ENDING)
2293 goto ending;
2294
2295 if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 ||
2296 (!(msg->flags & HTTP_MSGF_XFER_LEN) && !HAS_RSP_DATA_FILTERS(s))) {
2297 msg->msg_state = HTTP_MSG_ENDING;
2298 goto ending;
2299 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002300
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002301 /* Forward input data. We get it by removing all outgoing data not
2302 * forwarded yet from HTX data size. If there are some data filters, we
2303 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02002304 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002305 if (HAS_RSP_DATA_FILTERS(s)) {
2306 ret = flt_http_payload(s, msg, htx->data);
2307 if (ret < 0)
2308 goto return_bad_res;
Christopher Faulet421e7692019-06-13 11:16:45 +02002309 c_adv(res, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002310 }
2311 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02002312 c_adv(res, htx->data - co_data(res));
Christopher Faulet66af0b22019-03-22 14:54:52 +01002313 if (msg->flags & HTTP_MSGF_XFER_LEN)
2314 channel_htx_forward_forever(res, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002315 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002316
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002317 if (htx->data != co_data(res))
2318 goto missing_data_or_waiting;
2319
2320 if (!(msg->flags & HTTP_MSGF_XFER_LEN) && res->flags & CF_SHUTR) {
2321 msg->msg_state = HTTP_MSG_ENDING;
2322 goto ending;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002323 }
2324
Christopher Faulet9768c262018-10-22 09:34:31 +02002325 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002326 * in HTTP_MSG_ENDING state. Then if all data was marked to be
2327 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02002328 */
2329 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
2330 goto missing_data_or_waiting;
2331
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002332 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02002333
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002334 ending:
2335 /* other states, ENDING...TUNNEL */
2336 if (msg->msg_state >= HTTP_MSG_DONE)
2337 goto done;
Christopher Faulet9768c262018-10-22 09:34:31 +02002338
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002339 if (HAS_RSP_DATA_FILTERS(s)) {
2340 ret = flt_http_end(s, msg);
2341 if (ret <= 0) {
2342 if (!ret)
2343 goto missing_data_or_waiting;
2344 goto return_bad_res;
2345 }
2346 }
2347
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002348 if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 ||
2349 !(msg->flags & HTTP_MSGF_XFER_LEN)) {
2350 msg->msg_state = HTTP_MSG_TUNNEL;
2351 goto ending;
2352 }
2353 else {
2354 msg->msg_state = HTTP_MSG_DONE;
2355 res->to_forward = 0;
2356 }
2357
2358 done:
2359
2360 channel_dont_close(res);
2361
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002362 http_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002363 if (!(res->analysers & an_bit)) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002364 http_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002365 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2366 if (res->flags & CF_SHUTW) {
2367 /* response errors are most likely due to the
2368 * client aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002369 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002370 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002371 goto return_bad_res;
2372 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002373 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002374 return 1;
2375 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002376 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
2377 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002378 return 0;
2379
2380 missing_data_or_waiting:
2381 if (res->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01002382 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002383
2384 /* stop waiting for data if the input is closed before the end. If the
2385 * client side was already closed, it means that the client has aborted,
2386 * so we don't want to count this as a server abort. Otherwise it's a
2387 * server abort.
2388 */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002389 if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002390 if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002391 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002392 /* If we have some pending data, we continue the processing */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002393 if (htx_is_empty(htx))
2394 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002395 }
2396
Christopher Faulete0768eb2018-10-03 16:38:02 +02002397 /* When TE: chunked is used, we need to get there again to parse
2398 * remaining chunks even if the server has closed, so we don't want to
Christopher Faulet9768c262018-10-22 09:34:31 +02002399 * set CF_DONTCLOSE. Similarly when there is a content-leng or if there
2400 * are filters registered on the stream, we don't want to forward a
2401 * close
Christopher Faulete0768eb2018-10-03 16:38:02 +02002402 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002403 if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002404 channel_dont_close(res);
2405
2406 /* We know that more data are expected, but we couldn't send more that
2407 * what we did. So we always set the CF_EXPECT_MORE flag so that the
2408 * system knows it must not set a PUSH on this first part. Interactive
2409 * modes are already handled by the stream sock layer. We must not do
2410 * this in content-length mode because it could present the MSG_MORE
2411 * flag with the last block of forwarded data, which would cause an
2412 * additional delay to be observed by the receiver.
2413 */
2414 if ((msg->flags & HTTP_MSGF_TE_CHNK) || (msg->flags & HTTP_MSGF_COMPRESSING))
2415 res->flags |= CF_EXPECT_MORE;
2416
2417 /* the stream handler will take care of timeouts and errors */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002418 DBG_TRACE_DEVEL("waiting for more data to forward",
2419 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002420 return 0;
2421
Christopher Faulet93e02d82019-03-08 14:18:50 +01002422 return_srv_abort:
2423 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
2424 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002425 if (sess->listener->counters)
2426 _HA_ATOMIC_ADD(&sess->listener->counters->srv_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002427 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01002428 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.srv_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002429 if (!(s->flags & SF_ERR_MASK))
2430 s->flags |= SF_ERR_SRVCL;
2431 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002432
Christopher Faulet93e02d82019-03-08 14:18:50 +01002433 return_cli_abort:
2434 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
2435 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002436 if (sess->listener->counters)
2437 _HA_ATOMIC_ADD(&sess->listener->counters->cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002438 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01002439 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002440 if (!(s->flags & SF_ERR_MASK))
2441 s->flags |= SF_ERR_CLICL;
2442 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002443
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002444 return_int_err:
Christopher Fauletcff0f732019-12-16 16:13:44 +01002445 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002446 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002447 if (sess->listener->counters)
2448 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002449 if (objt_server(s->target))
2450 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002451 if (!(s->flags & SF_ERR_MASK))
2452 s->flags |= SF_ERR_INTERNAL;
2453 goto return_error;
2454
Christopher Faulet93e02d82019-03-08 14:18:50 +01002455 return_bad_res:
2456 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
2457 if (objt_server(s->target)) {
Christopher Fauletcff0f732019-12-16 16:13:44 +01002458 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002459 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2460 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002461 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002462 s->flags |= SF_ERR_SRVCL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002463 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002464
Christopher Faulet93e02d82019-03-08 14:18:50 +01002465 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002466 /* don't send any error message as we're in the body */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002467 http_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002468 res->analysers &= AN_RES_FLT_END;
2469 s->req.analysers &= AN_REQ_FLT_END; /* we're in data phase, we want to abort both directions */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002470 if (!(s->flags & SF_FINST_MASK))
2471 s->flags |= SF_FINST_D;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002472 DBG_TRACE_DEVEL("leaving on error",
2473 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002474 return 0;
2475}
2476
Christopher Fauletf2824e62018-10-01 12:12:37 +02002477/* Perform an HTTP redirect based on the information in <rule>. The function
Christopher Faulet99daf282018-11-28 22:58:13 +01002478 * returns zero on success, or zero in case of a, irrecoverable error such
Christopher Fauletf2824e62018-10-01 12:12:37 +02002479 * as too large a request to build a valid response.
2480 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002481int http_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
Christopher Fauletf2824e62018-10-01 12:12:37 +02002482{
Christopher Faulet99daf282018-11-28 22:58:13 +01002483 struct channel *req = &s->req;
2484 struct channel *res = &s->res;
2485 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01002486 struct htx_sl *sl;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002487 struct buffer *chunk;
Christopher Faulet99daf282018-11-28 22:58:13 +01002488 struct ist status, reason, location;
2489 unsigned int flags;
Christopher Faulet08e66462019-05-23 16:44:59 +02002490 int close = 0; /* Try to keep the connection alive byt default */
Christopher Fauletf2824e62018-10-01 12:12:37 +02002491
2492 chunk = alloc_trash_chunk();
Christopher Fauletb8a53712019-12-16 11:29:38 +01002493 if (!chunk) {
2494 if (!(s->flags & SF_ERR_MASK))
2495 s->flags |= SF_ERR_RESOURCE;
Christopher Faulet99daf282018-11-28 22:58:13 +01002496 goto fail;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002497 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002498
Christopher Faulet99daf282018-11-28 22:58:13 +01002499 /*
2500 * Create the location
2501 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002502 htx = htxbuf(&req->buf);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002503 switch(rule->type) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002504 case REDIRECT_TYPE_SCHEME: {
2505 struct http_hdr_ctx ctx;
2506 struct ist path, host;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002507
Christopher Faulet99daf282018-11-28 22:58:13 +01002508 host = ist("");
2509 ctx.blk = NULL;
2510 if (http_find_header(htx, ist("Host"), &ctx, 0))
2511 host = ctx.value;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002512
Christopher Faulet297fbb42019-05-13 14:41:27 +02002513 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002514 path = http_get_path(htx_sl_req_uri(sl));
2515 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002516 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002517 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2518 int qs = 0;
2519 while (qs < path.len) {
2520 if (*(path.ptr + qs) == '?') {
2521 path.len = qs;
2522 break;
2523 }
2524 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002525 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002526 }
2527 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002528 else
2529 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002530
Christopher Faulet99daf282018-11-28 22:58:13 +01002531 if (rule->rdr_str) { /* this is an old "redirect" rule */
2532 /* add scheme */
2533 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2534 goto fail;
2535 }
2536 else {
2537 /* add scheme with executing log format */
2538 chunk->data += build_logline(s, chunk->area + chunk->data,
2539 chunk->size - chunk->data,
2540 &rule->rdr_fmt);
2541 }
2542 /* add "://" + host + path */
2543 if (!chunk_memcat(chunk, "://", 3) ||
2544 !chunk_memcat(chunk, host.ptr, host.len) ||
2545 !chunk_memcat(chunk, path.ptr, path.len))
2546 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002547
Christopher Faulet99daf282018-11-28 22:58:13 +01002548 /* append a slash at the end of the location if needed and missing */
2549 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2550 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2551 if (chunk->data + 1 >= chunk->size)
2552 goto fail;
2553 chunk->area[chunk->data++] = '/';
2554 }
2555 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002556 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002557
Christopher Faulet99daf282018-11-28 22:58:13 +01002558 case REDIRECT_TYPE_PREFIX: {
2559 struct ist path;
2560
Christopher Faulet297fbb42019-05-13 14:41:27 +02002561 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002562 path = http_get_path(htx_sl_req_uri(sl));
2563 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002564 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002565 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2566 int qs = 0;
2567 while (qs < path.len) {
2568 if (*(path.ptr + qs) == '?') {
2569 path.len = qs;
2570 break;
2571 }
2572 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002573 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002574 }
2575 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002576 else
2577 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002578
Christopher Faulet99daf282018-11-28 22:58:13 +01002579 if (rule->rdr_str) { /* this is an old "redirect" rule */
2580 /* add prefix. Note that if prefix == "/", we don't want to
2581 * add anything, otherwise it makes it hard for the user to
2582 * configure a self-redirection.
2583 */
2584 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
2585 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2586 goto fail;
2587 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002588 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002589 else {
2590 /* add prefix with executing log format */
2591 chunk->data += build_logline(s, chunk->area + chunk->data,
2592 chunk->size - chunk->data,
2593 &rule->rdr_fmt);
2594 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002595
Christopher Faulet99daf282018-11-28 22:58:13 +01002596 /* add path */
2597 if (!chunk_memcat(chunk, path.ptr, path.len))
2598 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002599
Christopher Faulet99daf282018-11-28 22:58:13 +01002600 /* append a slash at the end of the location if needed and missing */
2601 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2602 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2603 if (chunk->data + 1 >= chunk->size)
2604 goto fail;
2605 chunk->area[chunk->data++] = '/';
2606 }
2607 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002608 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002609 case REDIRECT_TYPE_LOCATION:
2610 default:
2611 if (rule->rdr_str) { /* this is an old "redirect" rule */
2612 /* add location */
2613 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2614 goto fail;
2615 }
2616 else {
2617 /* add location with executing log format */
2618 chunk->data += build_logline(s, chunk->area + chunk->data,
2619 chunk->size - chunk->data,
2620 &rule->rdr_fmt);
2621 }
2622 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002623 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002624 location = ist2(chunk->area, chunk->data);
2625
2626 /*
2627 * Create the 30x response
2628 */
2629 switch (rule->code) {
2630 case 308:
2631 status = ist("308");
2632 reason = ist("Permanent Redirect");
2633 break;
2634 case 307:
2635 status = ist("307");
2636 reason = ist("Temporary Redirect");
2637 break;
2638 case 303:
2639 status = ist("303");
2640 reason = ist("See Other");
2641 break;
2642 case 301:
2643 status = ist("301");
2644 reason = ist("Moved Permanently");
2645 break;
2646 case 302:
2647 default:
2648 status = ist("302");
2649 reason = ist("Found");
2650 break;
2651 }
2652
Christopher Faulet08e66462019-05-23 16:44:59 +02002653 if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE)
2654 close = 1;
2655
Christopher Faulet99daf282018-11-28 22:58:13 +01002656 htx = htx_from_buf(&res->buf);
Kevin Zhu96b36392020-01-07 09:42:55 +01002657 /* Trim any possible response */
2658 channel_htx_truncate(&s->res, htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002659 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2660 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason);
2661 if (!sl)
2662 goto fail;
2663 sl->info.res.status = rule->code;
2664 s->txn->status = rule->code;
2665
Christopher Faulet08e66462019-05-23 16:44:59 +02002666 if (close && !htx_add_header(htx, ist("Connection"), ist("close")))
2667 goto fail;
2668
2669 if (!htx_add_header(htx, ist("Content-length"), ist("0")) ||
Christopher Faulet99daf282018-11-28 22:58:13 +01002670 !htx_add_header(htx, ist("Location"), location))
2671 goto fail;
2672
2673 if (rule->code == 302 || rule->code == 303 || rule->code == 307) {
2674 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")))
2675 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002676 }
2677
2678 if (rule->cookie_len) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002679 if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len)))
2680 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002681 }
2682
Christopher Faulet99daf282018-11-28 22:58:13 +01002683 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
2684 goto fail;
2685
Kevin Zhu96b36392020-01-07 09:42:55 +01002686 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01002687 if (!http_forward_proxy_resp(s, 1))
2688 goto fail;
Christopher Faulet99daf282018-11-28 22:58:13 +01002689
Christopher Faulet60b33a52020-01-28 09:18:10 +01002690 if (rule->flags & REDIRECT_FLAG_FROM_REQ) {
2691 /* let's log the request time */
2692 s->logs.tv_request = now;
2693 req->analysers &= AN_REQ_FLT_END;
Christopher Faulet99daf282018-11-28 22:58:13 +01002694
Christopher Faulet60b33a52020-01-28 09:18:10 +01002695 if (s->sess->fe == s->be) /* report it if the request was intercepted by the frontend */
2696 _HA_ATOMIC_ADD(&s->sess->fe->fe_counters.intercepted_req, 1);
2697 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002698
2699 if (!(s->flags & SF_ERR_MASK))
2700 s->flags |= SF_ERR_LOCAL;
2701 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet60b33a52020-01-28 09:18:10 +01002702 s->flags |= ((rule->flags & REDIRECT_FLAG_FROM_REQ) ? SF_FINST_R : SF_FINST_H);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002703
Christopher Faulet99daf282018-11-28 22:58:13 +01002704 free_trash_chunk(chunk);
2705 return 1;
2706
2707 fail:
2708 /* If an error occurred, remove the incomplete HTTP response from the
2709 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002710 channel_htx_truncate(res, htxbuf(&res->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02002711 free_trash_chunk(chunk);
Christopher Faulet99daf282018-11-28 22:58:13 +01002712 return 0;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002713}
2714
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002715/* Replace all headers matching the name <name>. The header value is replaced if
2716 * it matches the regex <re>. <str> is used for the replacement. If <full> is
2717 * set to 1, the full-line is matched and replaced. Otherwise, comma-separated
2718 * values are evaluated one by one. It returns 0 on success and -1 on error.
2719 */
2720int http_replace_hdrs(struct stream* s, struct htx *htx, struct ist name,
2721 const char *str, struct my_regex *re, int full)
Christopher Faulet72333522018-10-24 11:25:02 +02002722{
2723 struct http_hdr_ctx ctx;
2724 struct buffer *output = get_trash_chunk();
2725
Christopher Faulet72333522018-10-24 11:25:02 +02002726 ctx.blk = NULL;
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002727 while (http_find_header(htx, name, &ctx, full)) {
Christopher Faulet72333522018-10-24 11:25:02 +02002728 if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0))
2729 continue;
2730
2731 output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch);
2732 if (output->data == -1)
2733 return -1;
2734 if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data)))
2735 return -1;
2736 }
2737 return 0;
2738}
2739
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002740/* This function executes one of the set-{method,path,query,uri} actions. It
2741 * takes the string from the variable 'replace' with length 'len', then modifies
2742 * the relevant part of the request line accordingly. Then it updates various
2743 * pointers to the next elements which were moved, and the total buffer length.
2744 * It finds the action to be performed in p[2], previously filled by function
2745 * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
2746 * error, though this can be revisited when this code is finally exploited.
2747 *
2748 * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
2749 * query string and 3 to replace uri.
2750 *
2751 * In query string case, the mark question '?' must be set at the start of the
2752 * string by the caller, event if the replacement query string is empty.
2753 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002754int http_req_replace_stline(int action, const char *replace, int len,
2755 struct proxy *px, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002756{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002757 struct htx *htx = htxbuf(&s->req.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002758
2759 switch (action) {
2760 case 0: // method
2761 if (!http_replace_req_meth(htx, ist2(replace, len)))
2762 return -1;
2763 break;
2764
2765 case 1: // path
2766 if (!http_replace_req_path(htx, ist2(replace, len)))
2767 return -1;
2768 break;
2769
2770 case 2: // query
2771 if (!http_replace_req_query(htx, ist2(replace, len)))
2772 return -1;
2773 break;
2774
2775 case 3: // uri
2776 if (!http_replace_req_uri(htx, ist2(replace, len)))
2777 return -1;
2778 break;
2779
2780 default:
2781 return -1;
2782 }
2783 return 0;
2784}
2785
2786/* This function replace the HTTP status code and the associated message. The
Christopher Faulete00d06c2019-12-16 17:18:42 +01002787 * variable <status> contains the new status code. This function never fails. It
2788 * returns 0 in case of success, -1 in case of internal error.
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002789 */
Christopher Faulet96bff762019-12-17 13:46:18 +01002790int http_res_set_status(unsigned int status, struct ist reason, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002791{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002792 struct htx *htx = htxbuf(&s->res.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002793 char *res;
2794
2795 chunk_reset(&trash);
2796 res = ultoa_o(status, trash.area, trash.size);
2797 trash.data = res - trash.area;
2798
2799 /* Do we have a custom reason format string? */
Tim Duesterhuse296d3e2020-03-05 17:56:31 +01002800 if (!isttest(reason)) {
Christopher Faulet96bff762019-12-17 13:46:18 +01002801 const char *str = http_get_reason(status);
2802 reason = ist2(str, strlen(str));
2803 }
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002804
Christopher Faulete00d06c2019-12-16 17:18:42 +01002805 if (!http_replace_res_status(htx, ist2(trash.area, trash.data)))
2806 return -1;
Christopher Faulet96bff762019-12-17 13:46:18 +01002807 if (!http_replace_res_reason(htx, reason))
Christopher Faulete00d06c2019-12-16 17:18:42 +01002808 return -1;
2809 return 0;
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002810}
2811
Christopher Faulet3e964192018-10-24 11:39:23 +02002812/* Executes the http-request rules <rules> for stream <s>, proxy <px> and
2813 * transaction <txn>. Returns the verdict of the first rule that prevents
2814 * further processing of the request (auth, deny, ...), and defaults to
2815 * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
2816 * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
2817 * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
2818 * and a deny/tarpit rule is matched, it will be filled with this rule's deny
2819 * status.
2820 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002821static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules,
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002822 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002823{
2824 struct session *sess = strm_sess(s);
2825 struct http_txn *txn = s->txn;
2826 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02002827 struct act_rule *rule;
2828 struct http_hdr_ctx ctx;
Christopher Faulet3e964192018-10-24 11:39:23 +02002829 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002830 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002831
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002832 htx = htxbuf(&s->req.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02002833
2834 /* If "the current_rule_list" match the executed rule list, we are in
2835 * resume condition. If a resume is needed it is always in the action
2836 * and never in the ACL or converters. In this case, we initialise the
2837 * current rule, and go to the action execution point.
2838 */
2839 if (s->current_rule) {
2840 rule = s->current_rule;
2841 s->current_rule = NULL;
2842 if (s->current_rule_list == rules)
2843 goto resume_execution;
2844 }
2845 s->current_rule_list = rules;
2846
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002847 /* start the ruleset evaluation in strict mode */
2848 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002849
Christopher Faulet3e964192018-10-24 11:39:23 +02002850 list_for_each_entry(rule, rules, list) {
2851 /* check optional condition */
2852 if (rule->cond) {
2853 int ret;
2854
2855 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
2856 ret = acl_pass(ret);
2857
2858 if (rule->cond->pol == ACL_COND_UNLESS)
2859 ret = !ret;
2860
2861 if (!ret) /* condition not matched */
2862 continue;
2863 }
2864
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002865 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02002866 resume_execution:
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002867 /* Always call the action function if defined */
2868 if (rule->action_ptr) {
2869 if ((s->req.flags & CF_READ_ERROR) ||
2870 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
2871 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002872 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002873
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002874 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002875 case ACT_RET_CONT:
2876 break;
2877 case ACT_RET_STOP:
2878 rule_ret = HTTP_RULE_RES_STOP;
2879 goto end;
2880 case ACT_RET_YIELD:
2881 s->current_rule = rule;
2882 rule_ret = HTTP_RULE_RES_YIELD;
2883 goto end;
2884 case ACT_RET_ERR:
2885 rule_ret = HTTP_RULE_RES_ERROR;
2886 goto end;
2887 case ACT_RET_DONE:
2888 rule_ret = HTTP_RULE_RES_DONE;
2889 goto end;
2890 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002891 if (txn->status == -1)
2892 txn->status = 403;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002893 rule_ret = HTTP_RULE_RES_DENY;
2894 goto end;
2895 case ACT_RET_ABRT:
2896 rule_ret = HTTP_RULE_RES_ABRT;
2897 goto end;
2898 case ACT_RET_INV:
2899 rule_ret = HTTP_RULE_RES_BADREQ;
2900 goto end;
2901 }
2902 continue; /* eval the next rule */
2903 }
2904
2905 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02002906 switch (rule->action) {
2907 case ACT_ACTION_ALLOW:
2908 rule_ret = HTTP_RULE_RES_STOP;
2909 goto end;
2910
2911 case ACT_ACTION_DENY:
Christopher Faulet5cb513a2020-05-13 17:56:56 +02002912 txn->status = rule->arg.http_reply->status;
2913 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3e964192018-10-24 11:39:23 +02002914 rule_ret = HTTP_RULE_RES_DENY;
2915 goto end;
2916
2917 case ACT_HTTP_REQ_TARPIT:
2918 txn->flags |= TX_CLTARPIT;
Christopher Faulet5cb513a2020-05-13 17:56:56 +02002919 txn->status = rule->arg.http_reply->status;
2920 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3e964192018-10-24 11:39:23 +02002921 rule_ret = HTTP_RULE_RES_DENY;
2922 goto end;
2923
Christopher Faulet3e964192018-10-24 11:39:23 +02002924 case ACT_HTTP_REDIR:
Christopher Faulet90d22a82020-03-06 11:18:39 +01002925 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002926 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01002927 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02002928 goto end;
2929
2930 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01002931 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002932 break;
2933
2934 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01002935 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002936 break;
2937
2938 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01002939 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002940 break;
2941
2942 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01002943 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002944 break;
2945
Christopher Faulet3e964192018-10-24 11:39:23 +02002946 case ACT_HTTP_DEL_HDR:
2947 /* remove all occurrences of the header */
2948 ctx.blk = NULL;
Christopher Faulet96bff762019-12-17 13:46:18 +01002949 while (http_find_header(htx, rule->arg.http.str, &ctx, 1))
Christopher Faulet3e964192018-10-24 11:39:23 +02002950 http_remove_header(htx, &ctx);
2951 break;
2952
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002953 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02002954 default:
2955 break;
2956 }
2957 }
2958
2959 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002960 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01002961 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002962 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002963
Christopher Faulet3e964192018-10-24 11:39:23 +02002964 /* we reached the end of the rules, nothing to report */
2965 return rule_ret;
2966}
2967
2968/* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
2969 * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
2970 * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
2971 * is returned, the process can continue the evaluation of next rule list. If
2972 * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
2973 * is returned, it means the operation could not be processed and a server error
Christopher Fauleta53abad2020-05-13 08:12:22 +02002974 * must be returned. If *YIELD is returned, the caller must call again the
2975 * function with the same context.
Christopher Faulet3e964192018-10-24 11:39:23 +02002976 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002977static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules,
2978 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002979{
2980 struct session *sess = strm_sess(s);
2981 struct http_txn *txn = s->txn;
2982 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02002983 struct act_rule *rule;
2984 struct http_hdr_ctx ctx;
2985 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002986 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002987
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002988 htx = htxbuf(&s->res.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02002989
2990 /* If "the current_rule_list" match the executed rule list, we are in
2991 * resume condition. If a resume is needed it is always in the action
2992 * and never in the ACL or converters. In this case, we initialise the
2993 * current rule, and go to the action execution point.
2994 */
2995 if (s->current_rule) {
2996 rule = s->current_rule;
2997 s->current_rule = NULL;
2998 if (s->current_rule_list == rules)
2999 goto resume_execution;
3000 }
3001 s->current_rule_list = rules;
3002
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003003 /* start the ruleset evaluation in strict mode */
3004 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01003005
Christopher Faulet3e964192018-10-24 11:39:23 +02003006 list_for_each_entry(rule, rules, list) {
3007 /* check optional condition */
3008 if (rule->cond) {
3009 int ret;
3010
3011 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
3012 ret = acl_pass(ret);
3013
3014 if (rule->cond->pol == ACL_COND_UNLESS)
3015 ret = !ret;
3016
3017 if (!ret) /* condition not matched */
3018 continue;
3019 }
3020
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003021 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02003022resume_execution:
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003023
3024 /* Always call the action function if defined */
3025 if (rule->action_ptr) {
3026 if ((s->req.flags & CF_READ_ERROR) ||
3027 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
3028 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003029 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003030
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003031 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003032 case ACT_RET_CONT:
3033 break;
3034 case ACT_RET_STOP:
3035 rule_ret = HTTP_RULE_RES_STOP;
3036 goto end;
3037 case ACT_RET_YIELD:
3038 s->current_rule = rule;
3039 rule_ret = HTTP_RULE_RES_YIELD;
3040 goto end;
3041 case ACT_RET_ERR:
3042 rule_ret = HTTP_RULE_RES_ERROR;
3043 goto end;
3044 case ACT_RET_DONE:
3045 rule_ret = HTTP_RULE_RES_DONE;
3046 goto end;
3047 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01003048 if (txn->status == -1)
3049 txn->status = 502;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003050 rule_ret = HTTP_RULE_RES_DENY;
3051 goto end;
3052 case ACT_RET_ABRT:
3053 rule_ret = HTTP_RULE_RES_ABRT;
3054 goto end;
3055 case ACT_RET_INV:
3056 rule_ret = HTTP_RULE_RES_BADREQ;
3057 goto end;
3058 }
3059 continue; /* eval the next rule */
3060 }
3061
3062 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02003063 switch (rule->action) {
3064 case ACT_ACTION_ALLOW:
3065 rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
3066 goto end;
3067
3068 case ACT_ACTION_DENY:
Christopher Faulet5cb513a2020-05-13 17:56:56 +02003069 txn->status = rule->arg.http_reply->status;
3070 txn->http_reply = rule->arg.http_reply;
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003071 rule_ret = HTTP_RULE_RES_DENY;
Christopher Faulet3e964192018-10-24 11:39:23 +02003072 goto end;
3073
3074 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01003075 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003076 break;
3077
3078 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01003079 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003080 break;
3081
3082 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01003083 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003084 break;
3085
3086 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01003087 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003088 break;
3089
Christopher Faulet3e964192018-10-24 11:39:23 +02003090 case ACT_HTTP_DEL_HDR:
3091 /* remove all occurrences of the header */
3092 ctx.blk = NULL;
Christopher Faulet96bff762019-12-17 13:46:18 +01003093 while (http_find_header(htx, rule->arg.http.str, &ctx, 1))
Christopher Faulet3e964192018-10-24 11:39:23 +02003094 http_remove_header(htx, &ctx);
3095 break;
3096
Christopher Faulet3e964192018-10-24 11:39:23 +02003097 case ACT_HTTP_REDIR:
Christopher Faulet49c2a702020-03-06 15:44:37 +01003098 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003099 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003100 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02003101 goto end;
3102
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003103 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003104 default:
3105 break;
3106 }
3107 }
3108
3109 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003110 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01003111 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003112 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01003113
Christopher Faulet3e964192018-10-24 11:39:23 +02003114 /* we reached the end of the rules, nothing to report */
3115 return rule_ret;
3116}
3117
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003118/* Executes backend and frontend http-after-response rules for the stream <s>,
3119 * in that order. it return 1 on success and 0 on error. It is the caller
3120 * responsibility to catch error or ignore it. If it catches it, this function
3121 * may be called a second time, for the internal error.
3122 */
3123int http_eval_after_res_rules(struct stream *s)
3124{
3125 struct session *sess = s->sess;
3126 enum rule_result ret = HTTP_RULE_RES_CONT;
3127
Christopher Faulet507479b2020-05-15 12:29:46 +02003128 /* Eval after-response ruleset only if the reply is not const */
3129 if (s->txn->flags & TX_CONST_REPLY)
3130 goto end;
3131
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003132 /* prune the request variables if not already done and swap to the response variables. */
3133 if (s->vars_reqres.scope != SCOPE_RES) {
3134 if (!LIST_ISEMPTY(&s->vars_reqres.head))
3135 vars_prune(&s->vars_reqres, s->sess, s);
3136 vars_init(&s->vars_reqres, SCOPE_RES);
3137 }
3138
3139 ret = http_res_get_intercept_rule(s->be, &s->be->http_after_res_rules, s);
3140 if ((ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) && sess->fe != s->be)
3141 ret = http_res_get_intercept_rule(sess->fe, &sess->fe->http_after_res_rules, s);
3142
Christopher Faulet507479b2020-05-15 12:29:46 +02003143 end:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003144 /* All other codes than CONTINUE, STOP or DONE are forbidden */
3145 return (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP || ret == HTTP_RULE_RES_DONE);
3146}
3147
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003148/*
3149 * Manage client-side cookie. It can impact performance by about 2% so it is
3150 * desirable to call it only when needed. This code is quite complex because
3151 * of the multiple very crappy and ambiguous syntaxes we have to support. it
3152 * highly recommended not to touch this part without a good reason !
3153 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003154static void http_manage_client_side_cookies(struct stream *s, struct channel *req)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003155{
3156 struct session *sess = s->sess;
3157 struct http_txn *txn = s->txn;
3158 struct htx *htx;
3159 struct http_hdr_ctx ctx;
3160 char *hdr_beg, *hdr_end, *del_from;
3161 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
3162 int preserve_hdr;
3163
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003164 htx = htxbuf(&req->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003165 ctx.blk = NULL;
3166 while (http_find_header(htx, ist("Cookie"), &ctx, 1)) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003167 int is_first = 1;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003168 del_from = NULL; /* nothing to be deleted */
3169 preserve_hdr = 0; /* assume we may kill the whole header */
3170
3171 /* Now look for cookies. Conforming to RFC2109, we have to support
3172 * attributes whose name begin with a '$', and associate them with
3173 * the right cookie, if we want to delete this cookie.
3174 * So there are 3 cases for each cookie read :
3175 * 1) it's a special attribute, beginning with a '$' : ignore it.
3176 * 2) it's a server id cookie that we *MAY* want to delete : save
3177 * some pointers on it (last semi-colon, beginning of cookie...)
3178 * 3) it's an application cookie : we *MAY* have to delete a previous
3179 * "special" cookie.
3180 * At the end of loop, if a "special" cookie remains, we may have to
3181 * remove it. If no application cookie persists in the header, we
3182 * *MUST* delete it.
3183 *
3184 * Note: RFC2965 is unclear about the processing of spaces around
3185 * the equal sign in the ATTR=VALUE form. A careful inspection of
3186 * the RFC explicitly allows spaces before it, and not within the
3187 * tokens (attrs or values). An inspection of RFC2109 allows that
3188 * too but section 10.1.3 lets one think that spaces may be allowed
3189 * after the equal sign too, resulting in some (rare) buggy
3190 * implementations trying to do that. So let's do what servers do.
3191 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
3192 * allowed quoted strings in values, with any possible character
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003193 * after a backslash, including control chars and delimiters, which
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003194 * causes parsing to become ambiguous. Browsers also allow spaces
3195 * within values even without quotes.
3196 *
3197 * We have to keep multiple pointers in order to support cookie
3198 * removal at the beginning, middle or end of header without
3199 * corrupting the header. All of these headers are valid :
3200 *
3201 * hdr_beg hdr_end
3202 * | |
3203 * v |
3204 * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 |
3205 * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v
3206 * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3
3207 * | | | | | | |
3208 * | | | | | | |
3209 * | | | | | | +--> next
3210 * | | | | | +----> val_end
3211 * | | | | +-----------> val_beg
3212 * | | | +--------------> equal
3213 * | | +----------------> att_end
3214 * | +---------------------> att_beg
3215 * +--------------------------> prev
3216 *
3217 */
3218 hdr_beg = ctx.value.ptr;
3219 hdr_end = hdr_beg + ctx.value.len;
3220 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3221 /* Iterate through all cookies on this line */
3222
3223 /* find att_beg */
3224 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003225 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003226 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003227 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003228
3229 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3230 att_beg++;
3231
3232 /* find att_end : this is the first character after the last non
3233 * space before the equal. It may be equal to hdr_end.
3234 */
3235 equal = att_end = att_beg;
3236 while (equal < hdr_end) {
3237 if (*equal == '=' || *equal == ',' || *equal == ';')
3238 break;
3239 if (HTTP_IS_SPHT(*equal++))
3240 continue;
3241 att_end = equal;
3242 }
3243
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003244 /* here, <equal> points to '=', a delimiter or the end. <att_end>
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003245 * is between <att_beg> and <equal>, both may be identical.
3246 */
3247 /* look for end of cookie if there is an equal sign */
3248 if (equal < hdr_end && *equal == '=') {
3249 /* look for the beginning of the value */
3250 val_beg = equal + 1;
3251 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3252 val_beg++;
3253
3254 /* find the end of the value, respecting quotes */
3255 next = http_find_cookie_value_end(val_beg, hdr_end);
3256
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003257 /* make val_end point to the first white space or delimiter after the value */
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003258 val_end = next;
3259 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3260 val_end--;
3261 }
3262 else
3263 val_beg = val_end = next = equal;
3264
3265 /* We have nothing to do with attributes beginning with
3266 * '$'. However, they will automatically be removed if a
3267 * header before them is removed, since they're supposed
3268 * to be linked together.
3269 */
3270 if (*att_beg == '$')
3271 continue;
3272
3273 /* Ignore cookies with no equal sign */
3274 if (equal == next) {
3275 /* This is not our cookie, so we must preserve it. But if we already
3276 * scheduled another cookie for removal, we cannot remove the
3277 * complete header, but we can remove the previous block itself.
3278 */
3279 preserve_hdr = 1;
3280 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003281 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003282 val_end += delta;
3283 next += delta;
3284 hdr_end += delta;
3285 prev = del_from;
3286 del_from = NULL;
3287 }
3288 continue;
3289 }
3290
3291 /* if there are spaces around the equal sign, we need to
3292 * strip them otherwise we'll get trouble for cookie captures,
3293 * or even for rewrites. Since this happens extremely rarely,
3294 * it does not hurt performance.
3295 */
3296 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3297 int stripped_before = 0;
3298 int stripped_after = 0;
3299
3300 if (att_end != equal) {
3301 memmove(att_end, equal, hdr_end - equal);
3302 stripped_before = (att_end - equal);
3303 equal += stripped_before;
3304 val_beg += stripped_before;
3305 }
3306
3307 if (val_beg > equal + 1) {
3308 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3309 stripped_after = (equal + 1) - val_beg;
3310 val_beg += stripped_after;
3311 stripped_before += stripped_after;
3312 }
3313
3314 val_end += stripped_before;
3315 next += stripped_before;
3316 hdr_end += stripped_before;
3317 }
3318 /* now everything is as on the diagram above */
3319
3320 /* First, let's see if we want to capture this cookie. We check
3321 * that we don't already have a client side cookie, because we
3322 * can only capture one. Also as an optimisation, we ignore
3323 * cookies shorter than the declared name.
3324 */
3325 if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
3326 (val_end - att_beg >= sess->fe->capture_namelen) &&
3327 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3328 int log_len = val_end - att_beg;
3329
3330 if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
3331 ha_alert("HTTP logging : out of memory.\n");
3332 } else {
3333 if (log_len > sess->fe->capture_len)
3334 log_len = sess->fe->capture_len;
3335 memcpy(txn->cli_cookie, att_beg, log_len);
3336 txn->cli_cookie[log_len] = 0;
3337 }
3338 }
3339
3340 /* Persistence cookies in passive, rewrite or insert mode have the
3341 * following form :
3342 *
3343 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
3344 *
3345 * For cookies in prefix mode, the form is :
3346 *
3347 * Cookie: NAME=SRV~VALUE
3348 */
3349 if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3350 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3351 struct server *srv = s->be->srv;
3352 char *delim;
3353
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003354 /* if we're in cookie prefix mode, we'll search the delimiter so that we
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003355 * have the server ID between val_beg and delim, and the original cookie between
3356 * delim+1 and val_end. Otherwise, delim==val_end :
3357 *
3358 * hdr_beg
3359 * |
3360 * v
3361 * NAME=SRV; # in all but prefix modes
3362 * NAME=SRV~OPAQUE ; # in prefix mode
3363 * || || | |+-> next
3364 * || || | +--> val_end
3365 * || || +---------> delim
3366 * || |+------------> val_beg
3367 * || +-------------> att_end = equal
3368 * |+-----------------> att_beg
3369 * +------------------> prev
3370 *
3371 */
3372 if (s->be->ck_opts & PR_CK_PFX) {
3373 for (delim = val_beg; delim < val_end; delim++)
3374 if (*delim == COOKIE_DELIM)
3375 break;
3376 }
3377 else {
3378 char *vbar1;
3379 delim = val_end;
3380 /* Now check if the cookie contains a date field, which would
3381 * appear after a vertical bar ('|') just after the server name
3382 * and before the delimiter.
3383 */
3384 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
3385 if (vbar1) {
3386 /* OK, so left of the bar is the server's cookie and
3387 * right is the last seen date. It is a base64 encoded
3388 * 30-bit value representing the UNIX date since the
3389 * epoch in 4-second quantities.
3390 */
3391 int val;
3392 delim = vbar1++;
3393 if (val_end - vbar1 >= 5) {
3394 val = b64tos30(vbar1);
3395 if (val > 0)
3396 txn->cookie_last_date = val << 2;
3397 }
3398 /* look for a second vertical bar */
3399 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
3400 if (vbar1 && (val_end - vbar1 > 5)) {
3401 val = b64tos30(vbar1 + 1);
3402 if (val > 0)
3403 txn->cookie_first_date = val << 2;
3404 }
3405 }
3406 }
3407
3408 /* if the cookie has an expiration date and the proxy wants to check
3409 * it, then we do that now. We first check if the cookie is too old,
3410 * then only if it has expired. We detect strict overflow because the
3411 * time resolution here is not great (4 seconds). Cookies with dates
3412 * in the future are ignored if their offset is beyond one day. This
3413 * allows an admin to fix timezone issues without expiring everyone
3414 * and at the same time avoids keeping unwanted side effects for too
3415 * long.
3416 */
3417 if (txn->cookie_first_date && s->be->cookie_maxlife &&
3418 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
3419 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
3420 txn->flags &= ~TX_CK_MASK;
3421 txn->flags |= TX_CK_OLD;
3422 delim = val_beg; // let's pretend we have not found the cookie
3423 txn->cookie_first_date = 0;
3424 txn->cookie_last_date = 0;
3425 }
3426 else if (txn->cookie_last_date && s->be->cookie_maxidle &&
3427 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
3428 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
3429 txn->flags &= ~TX_CK_MASK;
3430 txn->flags |= TX_CK_EXPIRED;
3431 delim = val_beg; // let's pretend we have not found the cookie
3432 txn->cookie_first_date = 0;
3433 txn->cookie_last_date = 0;
3434 }
3435
3436 /* Here, we'll look for the first running server which supports the cookie.
3437 * This allows to share a same cookie between several servers, for example
3438 * to dedicate backup servers to specific servers only.
3439 * However, to prevent clients from sticking to cookie-less backup server
3440 * when they have incidentely learned an empty cookie, we simply ignore
3441 * empty cookies and mark them as invalid.
3442 * The same behaviour is applied when persistence must be ignored.
3443 */
3444 if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3445 srv = NULL;
3446
3447 while (srv) {
3448 if (srv->cookie && (srv->cklen == delim - val_beg) &&
3449 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
3450 if ((srv->cur_state != SRV_ST_STOPPED) ||
3451 (s->be->options & PR_O_PERSIST) ||
3452 (s->flags & SF_FORCE_PRST)) {
3453 /* we found the server and we can use it */
3454 txn->flags &= ~TX_CK_MASK;
3455 txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
3456 s->flags |= SF_DIRECT | SF_ASSIGNED;
3457 s->target = &srv->obj_type;
3458 break;
3459 } else {
3460 /* we found a server, but it's down,
3461 * mark it as such and go on in case
3462 * another one is available.
3463 */
3464 txn->flags &= ~TX_CK_MASK;
3465 txn->flags |= TX_CK_DOWN;
3466 }
3467 }
3468 srv = srv->next;
3469 }
3470
3471 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
3472 /* no server matched this cookie or we deliberately skipped it */
3473 txn->flags &= ~TX_CK_MASK;
3474 if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3475 txn->flags |= TX_CK_UNUSED;
3476 else
3477 txn->flags |= TX_CK_INVALID;
3478 }
3479
3480 /* depending on the cookie mode, we may have to either :
3481 * - delete the complete cookie if we're in insert+indirect mode, so that
3482 * the server never sees it ;
3483 * - remove the server id from the cookie value, and tag the cookie as an
Joseph Herlante9d5c722018-11-25 11:00:25 -08003484 * application cookie so that it does not get accidentally removed later,
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003485 * if we're in cookie prefix mode
3486 */
3487 if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
3488 int delta; /* negative */
3489
3490 memmove(val_beg, delim + 1, hdr_end - (delim + 1));
3491 delta = val_beg - (delim + 1);
3492 val_end += delta;
3493 next += delta;
3494 hdr_end += delta;
3495 del_from = NULL;
3496 preserve_hdr = 1; /* we want to keep this cookie */
3497 }
3498 else if (del_from == NULL &&
3499 (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
3500 del_from = prev;
3501 }
3502 }
3503 else {
3504 /* This is not our cookie, so we must preserve it. But if we already
3505 * scheduled another cookie for removal, we cannot remove the
3506 * complete header, but we can remove the previous block itself.
3507 */
3508 preserve_hdr = 1;
3509
3510 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003511 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003512 if (att_beg >= del_from)
3513 att_beg += delta;
3514 if (att_end >= del_from)
3515 att_end += delta;
3516 val_beg += delta;
3517 val_end += delta;
3518 next += delta;
3519 hdr_end += delta;
3520 prev = del_from;
3521 del_from = NULL;
3522 }
3523 }
3524
3525 /* continue with next cookie on this header line */
3526 att_beg = next;
3527 } /* for each cookie */
3528
3529
3530 /* There are no more cookies on this line.
3531 * We may still have one (or several) marked for deletion at the
3532 * end of the line. We must do this now in two ways :
3533 * - if some cookies must be preserved, we only delete from the
3534 * mark to the end of line ;
3535 * - if nothing needs to be preserved, simply delete the whole header
3536 */
3537 if (del_from) {
3538 hdr_end = (preserve_hdr ? del_from : hdr_beg);
3539 }
3540 if ((hdr_end - hdr_beg) != ctx.value.len) {
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003541 if (hdr_beg != hdr_end)
3542 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003543 else
3544 http_remove_header(htx, &ctx);
3545 }
3546 } /* for each "Cookie header */
3547}
3548
3549/*
3550 * Manage server-side cookies. It can impact performance by about 2% so it is
3551 * desirable to call it only when needed. This function is also used when we
3552 * just need to know if there is a cookie (eg: for check-cache).
3553 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003554static void http_manage_server_side_cookies(struct stream *s, struct channel *res)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003555{
3556 struct session *sess = s->sess;
3557 struct http_txn *txn = s->txn;
3558 struct htx *htx;
3559 struct http_hdr_ctx ctx;
3560 struct server *srv;
3561 char *hdr_beg, *hdr_end;
3562 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau6f7a02a2019-04-15 21:49:49 +02003563 int is_cookie2 = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003564
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003565 htx = htxbuf(&res->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003566
3567 ctx.blk = NULL;
3568 while (1) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003569 int is_first = 1;
3570
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003571 if (!http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) {
3572 if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1))
3573 break;
3574 is_cookie2 = 1;
3575 }
3576
3577 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
3578 * <prev> points to the colon.
3579 */
3580 txn->flags |= TX_SCK_PRESENT;
3581
3582 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
3583 * check-cache is enabled) and we are not interested in checking
3584 * them. Warning, the cookie capture is declared in the frontend.
3585 */
3586 if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
3587 break;
3588
3589 /* OK so now we know we have to process this response cookie.
3590 * The format of the Set-Cookie header is slightly different
3591 * from the format of the Cookie header in that it does not
3592 * support the comma as a cookie delimiter (thus the header
3593 * cannot be folded) because the Expires attribute described in
3594 * the original Netscape's spec may contain an unquoted date
3595 * with a comma inside. We have to live with this because
3596 * many browsers don't support Max-Age and some browsers don't
3597 * support quoted strings. However the Set-Cookie2 header is
3598 * clean.
3599 *
3600 * We have to keep multiple pointers in order to support cookie
3601 * removal at the beginning, middle or end of header without
3602 * corrupting the header (in case of set-cookie2). A special
3603 * pointer, <scav> points to the beginning of the set-cookie-av
3604 * fields after the first semi-colon. The <next> pointer points
3605 * either to the end of line (set-cookie) or next unquoted comma
3606 * (set-cookie2). All of these headers are valid :
3607 *
3608 * hdr_beg hdr_end
3609 * | |
3610 * v |
3611 * NAME1 = VALUE 1 ; Secure; Path="/" |
3612 * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v
3613 * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT
3614 * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard
3615 * | | | | | | | |
3616 * | | | | | | | +-> next
3617 * | | | | | | +------------> scav
3618 * | | | | | +--------------> val_end
3619 * | | | | +--------------------> val_beg
3620 * | | | +----------------------> equal
3621 * | | +------------------------> att_end
3622 * | +----------------------------> att_beg
3623 * +------------------------------> prev
3624 * -------------------------------> hdr_beg
3625 */
3626 hdr_beg = ctx.value.ptr;
3627 hdr_end = hdr_beg + ctx.value.len;
3628 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3629
3630 /* Iterate through all cookies on this line */
3631
3632 /* find att_beg */
3633 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003634 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003635 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003636 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003637
3638 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3639 att_beg++;
3640
3641 /* find att_end : this is the first character after the last non
3642 * space before the equal. It may be equal to hdr_end.
3643 */
3644 equal = att_end = att_beg;
3645
3646 while (equal < hdr_end) {
3647 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
3648 break;
3649 if (HTTP_IS_SPHT(*equal++))
3650 continue;
3651 att_end = equal;
3652 }
3653
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003654 /* here, <equal> points to '=', a delimiter or the end. <att_end>
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003655 * is between <att_beg> and <equal>, both may be identical.
3656 */
3657
3658 /* look for end of cookie if there is an equal sign */
3659 if (equal < hdr_end && *equal == '=') {
3660 /* look for the beginning of the value */
3661 val_beg = equal + 1;
3662 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3663 val_beg++;
3664
3665 /* find the end of the value, respecting quotes */
3666 next = http_find_cookie_value_end(val_beg, hdr_end);
3667
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05003668 /* make val_end point to the first white space or delimiter after the value */
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003669 val_end = next;
3670 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3671 val_end--;
3672 }
3673 else {
3674 /* <equal> points to next comma, semi-colon or EOL */
3675 val_beg = val_end = next = equal;
3676 }
3677
3678 if (next < hdr_end) {
3679 /* Set-Cookie2 supports multiple cookies, and <next> points to
3680 * a colon or semi-colon before the end. So skip all attr-value
3681 * pairs and look for the next comma. For Set-Cookie, since
3682 * commas are permitted in values, skip to the end.
3683 */
3684 if (is_cookie2)
3685 next = http_find_hdr_value_end(next, hdr_end);
3686 else
3687 next = hdr_end;
3688 }
3689
3690 /* Now everything is as on the diagram above */
3691
3692 /* Ignore cookies with no equal sign */
3693 if (equal == val_end)
3694 continue;
3695
3696 /* If there are spaces around the equal sign, we need to
3697 * strip them otherwise we'll get trouble for cookie captures,
3698 * or even for rewrites. Since this happens extremely rarely,
3699 * it does not hurt performance.
3700 */
3701 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3702 int stripped_before = 0;
3703 int stripped_after = 0;
3704
3705 if (att_end != equal) {
3706 memmove(att_end, equal, hdr_end - equal);
3707 stripped_before = (att_end - equal);
3708 equal += stripped_before;
3709 val_beg += stripped_before;
3710 }
3711
3712 if (val_beg > equal + 1) {
3713 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3714 stripped_after = (equal + 1) - val_beg;
3715 val_beg += stripped_after;
3716 stripped_before += stripped_after;
3717 }
3718
3719 val_end += stripped_before;
3720 next += stripped_before;
3721 hdr_end += stripped_before;
3722
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003723 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003724 ctx.value.len = hdr_end - hdr_beg;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003725 }
3726
3727 /* First, let's see if we want to capture this cookie. We check
3728 * that we don't already have a server side cookie, because we
3729 * can only capture one. Also as an optimisation, we ignore
3730 * cookies shorter than the declared name.
3731 */
3732 if (sess->fe->capture_name != NULL &&
3733 txn->srv_cookie == NULL &&
3734 (val_end - att_beg >= sess->fe->capture_namelen) &&
3735 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3736 int log_len = val_end - att_beg;
3737 if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
3738 ha_alert("HTTP logging : out of memory.\n");
3739 }
3740 else {
3741 if (log_len > sess->fe->capture_len)
3742 log_len = sess->fe->capture_len;
3743 memcpy(txn->srv_cookie, att_beg, log_len);
3744 txn->srv_cookie[log_len] = 0;
3745 }
3746 }
3747
3748 srv = objt_server(s->target);
3749 /* now check if we need to process it for persistence */
3750 if (!(s->flags & SF_IGNORE_PRST) &&
3751 (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3752 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3753 /* assume passive cookie by default */
3754 txn->flags &= ~TX_SCK_MASK;
3755 txn->flags |= TX_SCK_FOUND;
3756
3757 /* If the cookie is in insert mode on a known server, we'll delete
3758 * this occurrence because we'll insert another one later.
3759 * We'll delete it too if the "indirect" option is set and we're in
3760 * a direct access.
3761 */
3762 if (s->be->ck_opts & PR_CK_PSV) {
3763 /* The "preserve" flag was set, we don't want to touch the
3764 * server's cookie.
3765 */
3766 }
3767 else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
3768 ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
3769 /* this cookie must be deleted */
3770 if (prev == hdr_beg && next == hdr_end) {
3771 /* whole header */
3772 http_remove_header(htx, &ctx);
3773 /* note: while both invalid now, <next> and <hdr_end>
3774 * are still equal, so the for() will stop as expected.
3775 */
3776 } else {
3777 /* just remove the value */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003778 int delta = http_del_hdr_value(hdr_beg, hdr_end, &prev, next);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003779 next = prev;
3780 hdr_end += delta;
3781 }
3782 txn->flags &= ~TX_SCK_MASK;
3783 txn->flags |= TX_SCK_DELETED;
3784 /* and go on with next cookie */
3785 }
3786 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
3787 /* replace bytes val_beg->val_end with the cookie name associated
3788 * with this server since we know it.
3789 */
3790 int sliding, delta;
3791
3792 ctx.value = ist2(val_beg, val_end - val_beg);
3793 ctx.lws_before = ctx.lws_after = 0;
3794 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen));
3795 delta = srv->cklen - (val_end - val_beg);
3796 sliding = (ctx.value.ptr - val_beg);
3797 hdr_beg += sliding;
3798 val_beg += sliding;
3799 next += sliding + delta;
3800 hdr_end += sliding + delta;
3801
3802 txn->flags &= ~TX_SCK_MASK;
3803 txn->flags |= TX_SCK_REPLACED;
3804 }
3805 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
3806 /* insert the cookie name associated with this server
3807 * before existing cookie, and insert a delimiter between them..
3808 */
3809 int sliding, delta;
3810 ctx.value = ist2(val_beg, 0);
3811 ctx.lws_before = ctx.lws_after = 0;
3812 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1));
3813 delta = srv->cklen + 1;
3814 sliding = (ctx.value.ptr - val_beg);
3815 hdr_beg += sliding;
3816 val_beg += sliding;
3817 next += sliding + delta;
3818 hdr_end += sliding + delta;
3819
3820 val_beg[srv->cklen] = COOKIE_DELIM;
3821 txn->flags &= ~TX_SCK_MASK;
3822 txn->flags |= TX_SCK_REPLACED;
3823 }
3824 }
3825 /* that's done for this cookie, check the next one on the same
3826 * line when next != hdr_end (only if is_cookie2).
3827 */
3828 }
3829 }
3830}
3831
Christopher Faulet25a02f62018-10-24 12:00:25 +02003832/*
3833 * Parses the Cache-Control and Pragma request header fields to determine if
3834 * the request may be served from the cache and/or if it is cacheable. Updates
3835 * s->txn->flags.
3836 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003837void http_check_request_for_cacheability(struct stream *s, struct channel *req)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003838{
3839 struct http_txn *txn = s->txn;
3840 struct htx *htx;
3841 int32_t pos;
3842 int pragma_found, cc_found, i;
3843
3844 if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
3845 return; /* nothing more to do here */
3846
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003847 htx = htxbuf(&req->buf);
Christopher Faulet25a02f62018-10-24 12:00:25 +02003848 pragma_found = cc_found = 0;
Christopher Fauleta3f15502019-05-13 15:27:23 +02003849 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003850 struct htx_blk *blk = htx_get_blk(htx, pos);
3851 enum htx_blk_type type = htx_get_blk_type(blk);
3852 struct ist n, v;
3853
3854 if (type == HTX_BLK_EOH)
3855 break;
3856 if (type != HTX_BLK_HDR)
3857 continue;
3858
3859 n = htx_get_blk_name(htx, blk);
3860 v = htx_get_blk_value(htx, blk);
3861
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003862 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003863 if (v.len >= 8 && strncasecmp(v.ptr, "no-cache", 8) == 0) {
3864 pragma_found = 1;
3865 continue;
3866 }
3867 }
3868
3869 /* Don't use the cache and don't try to store if we found the
3870 * Authorization header */
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003871 if (isteq(n, ist("authorization"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003872 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3873 txn->flags |= TX_CACHE_IGNORE;
3874 continue;
3875 }
3876
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003877 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02003878 continue;
3879
3880 /* OK, right now we know we have a cache-control header */
3881 cc_found = 1;
3882 if (!v.len) /* no info */
3883 continue;
3884
3885 i = 0;
3886 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
3887 !isspace((unsigned char)*(v.ptr+i)))
3888 i++;
3889
3890 /* we have a complete value between v.ptr and (v.ptr+i). We don't check the
3891 * values after max-age, max-stale nor min-fresh, we simply don't
3892 * use the cache when they're specified.
3893 */
3894 if (((i == 7) && strncasecmp(v.ptr, "max-age", 7) == 0) ||
3895 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
3896 ((i == 9) && strncasecmp(v.ptr, "max-stale", 9) == 0) ||
3897 ((i == 9) && strncasecmp(v.ptr, "min-fresh", 9) == 0)) {
3898 txn->flags |= TX_CACHE_IGNORE;
3899 continue;
3900 }
3901
3902 if ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0) {
3903 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3904 continue;
3905 }
3906 }
3907
3908 /* RFC7234#5.4:
3909 * When the Cache-Control header field is also present and
3910 * understood in a request, Pragma is ignored.
3911 * When the Cache-Control header field is not present in a
3912 * request, caches MUST consider the no-cache request
3913 * pragma-directive as having the same effect as if
3914 * "Cache-Control: no-cache" were present.
3915 */
3916 if (!cc_found && pragma_found)
3917 txn->flags |= TX_CACHE_IGNORE;
3918}
3919
3920/*
3921 * Check if response is cacheable or not. Updates s->txn->flags.
3922 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003923void http_check_response_for_cacheability(struct stream *s, struct channel *res)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003924{
3925 struct http_txn *txn = s->txn;
3926 struct htx *htx;
3927 int32_t pos;
3928 int i;
3929
3930 if (txn->status < 200) {
3931 /* do not try to cache interim responses! */
3932 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3933 return;
3934 }
3935
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003936 htx = htxbuf(&res->buf);
Christopher Fauleta3f15502019-05-13 15:27:23 +02003937 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003938 struct htx_blk *blk = htx_get_blk(htx, pos);
3939 enum htx_blk_type type = htx_get_blk_type(blk);
3940 struct ist n, v;
3941
3942 if (type == HTX_BLK_EOH)
3943 break;
3944 if (type != HTX_BLK_HDR)
3945 continue;
3946
3947 n = htx_get_blk_name(htx, blk);
3948 v = htx_get_blk_value(htx, blk);
3949
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003950 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003951 if ((v.len >= 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) {
3952 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3953 return;
3954 }
3955 }
3956
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003957 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02003958 continue;
3959
3960 /* OK, right now we know we have a cache-control header */
3961 if (!v.len) /* no info */
3962 continue;
3963
3964 i = 0;
3965 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
3966 !isspace((unsigned char)*(v.ptr+i)))
3967 i++;
3968
3969 /* we have a complete value between v.ptr and (v.ptr+i) */
3970 if (i < v.len && *(v.ptr + i) == '=') {
3971 if (((v.len - i) > 1 && (i == 7) && strncasecmp(v.ptr, "max-age=0", 9) == 0) ||
3972 ((v.len - i) > 1 && (i == 8) && strncasecmp(v.ptr, "s-maxage=0", 10) == 0)) {
3973 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3974 continue;
3975 }
3976
3977 /* we have something of the form no-cache="set-cookie" */
3978 if ((v.len >= 21) &&
3979 strncasecmp(v.ptr, "no-cache=\"set-cookie", 20) == 0
3980 && (*(v.ptr + 20) == '"' || *(v.ptr + 20 ) == ','))
3981 txn->flags &= ~TX_CACHE_COOK;
3982 continue;
3983 }
3984
3985 /* OK, so we know that either p2 points to the end of string or to a comma */
3986 if (((i == 7) && strncasecmp(v.ptr, "private", 7) == 0) ||
3987 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
3988 ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0)) {
3989 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3990 return;
3991 }
3992
3993 if ((i == 6) && strncasecmp(v.ptr, "public", 6) == 0) {
3994 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
3995 continue;
3996 }
3997 }
3998}
3999
Christopher Faulet377c5a52018-10-24 21:21:30 +02004000/*
4001 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
4002 * for the current backend.
4003 *
4004 * It is assumed that the request is either a HEAD, GET, or POST and that the
4005 * uri_auth field is valid.
4006 *
4007 * Returns 1 if stats should be provided, otherwise 0.
4008 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004009static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend)
Christopher Faulet377c5a52018-10-24 21:21:30 +02004010{
4011 struct uri_auth *uri_auth = backend->uri_auth;
4012 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004013 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004014 struct ist uri;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004015
4016 if (!uri_auth)
4017 return 0;
4018
4019 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
4020 return 0;
4021
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004022 htx = htxbuf(&s->req.buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004023 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004024 uri = htx_sl_req_uri(sl);
Willy Tarreau1eb3b482019-10-31 15:50:28 +01004025 if (*uri_auth->uri_prefix == '/')
4026 uri = http_get_path(uri);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004027
4028 /* check URI size */
4029 if (uri_auth->uri_len > uri.len)
4030 return 0;
4031
4032 if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
4033 return 0;
4034
4035 return 1;
4036}
4037
4038/* This function prepares an applet to handle the stats. It can deal with the
4039 * "100-continue" expectation, check that admin rules are met for POST requests,
4040 * and program a response message if something was unexpected. It cannot fail
4041 * and always relies on the stats applet to complete the job. It does not touch
4042 * analysers nor counters, which are left to the caller. It does not touch
4043 * s->target which is supposed to already point to the stats applet. The caller
4044 * is expected to have already assigned an appctx to the stream.
4045 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004046static int http_handle_stats(struct stream *s, struct channel *req)
Christopher Faulet377c5a52018-10-24 21:21:30 +02004047{
4048 struct stats_admin_rule *stats_admin_rule;
4049 struct stream_interface *si = &s->si[1];
4050 struct session *sess = s->sess;
4051 struct http_txn *txn = s->txn;
4052 struct http_msg *msg = &txn->req;
4053 struct uri_auth *uri_auth = s->be->uri_auth;
4054 const char *h, *lookup, *end;
4055 struct appctx *appctx;
4056 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004057 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004058
4059 appctx = si_appctx(si);
4060 memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
4061 appctx->st1 = appctx->st2 = 0;
4062 appctx->ctx.stats.st_code = STAT_STATUS_INIT;
Willy Tarreau676c29e2019-10-09 10:50:01 +02004063 appctx->ctx.stats.flags |= uri_auth->flags;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004064 appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
4065 if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD))
4066 appctx->ctx.stats.flags |= STAT_CHUNKED;
4067
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004068 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004069 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004070 lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len;
4071 end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004072
4073 for (h = lookup; h <= end - 3; h++) {
4074 if (memcmp(h, ";up", 3) == 0) {
4075 appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
4076 break;
4077 }
4078 }
4079
4080 if (uri_auth->refresh) {
4081 for (h = lookup; h <= end - 10; h++) {
4082 if (memcmp(h, ";norefresh", 10) == 0) {
4083 appctx->ctx.stats.flags |= STAT_NO_REFRESH;
4084 break;
4085 }
4086 }
4087 }
4088
4089 for (h = lookup; h <= end - 4; h++) {
4090 if (memcmp(h, ";csv", 4) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004091 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004092 break;
4093 }
4094 }
4095
4096 for (h = lookup; h <= end - 6; h++) {
4097 if (memcmp(h, ";typed", 6) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004098 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004099 appctx->ctx.stats.flags |= STAT_FMT_TYPED;
4100 break;
4101 }
4102 }
4103
Christopher Faulet6338a082019-09-09 15:50:54 +02004104 for (h = lookup; h <= end - 5; h++) {
4105 if (memcmp(h, ";json", 5) == 0) {
4106 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
4107 appctx->ctx.stats.flags |= STAT_FMT_JSON;
4108 break;
4109 }
4110 }
4111
4112 for (h = lookup; h <= end - 12; h++) {
4113 if (memcmp(h, ";json-schema", 12) == 0) {
4114 appctx->ctx.stats.flags &= ~STAT_FMT_MASK;
4115 appctx->ctx.stats.flags |= STAT_JSON_SCHM;
4116 break;
4117 }
4118 }
4119
Christopher Faulet377c5a52018-10-24 21:21:30 +02004120 for (h = lookup; h <= end - 8; h++) {
4121 if (memcmp(h, ";st=", 4) == 0) {
4122 int i;
4123 h += 4;
4124 appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
4125 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
4126 if (strncmp(stat_status_codes[i], h, 4) == 0) {
4127 appctx->ctx.stats.st_code = i;
4128 break;
4129 }
4130 }
4131 break;
4132 }
4133 }
4134
4135 appctx->ctx.stats.scope_str = 0;
4136 appctx->ctx.stats.scope_len = 0;
4137 for (h = lookup; h <= end - 8; h++) {
4138 if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
4139 int itx = 0;
4140 const char *h2;
4141 char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
4142 const char *err;
4143
4144 h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
4145 h2 = h;
Christopher Fauleted7a0662019-01-14 11:07:34 +01004146 appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl);
4147 while (h < end) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004148 if (*h == ';' || *h == '&' || *h == ' ')
4149 break;
4150 itx++;
4151 h++;
4152 }
4153
4154 if (itx > STAT_SCOPE_TXT_MAXLEN)
4155 itx = STAT_SCOPE_TXT_MAXLEN;
4156 appctx->ctx.stats.scope_len = itx;
4157
4158 /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
4159 memcpy(scope_txt, h2, itx);
4160 scope_txt[itx] = '\0';
4161 err = invalid_char(scope_txt);
4162 if (err) {
4163 /* bad char in search text => clear scope */
4164 appctx->ctx.stats.scope_str = 0;
4165 appctx->ctx.stats.scope_len = 0;
4166 }
4167 break;
4168 }
4169 }
4170
4171 /* now check whether we have some admin rules for this request */
4172 list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
4173 int ret = 1;
4174
4175 if (stats_admin_rule->cond) {
4176 ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
4177 ret = acl_pass(ret);
4178 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
4179 ret = !ret;
4180 }
4181
4182 if (ret) {
4183 /* no rule, or the rule matches */
4184 appctx->ctx.stats.flags |= STAT_ADMIN;
4185 break;
4186 }
4187 }
4188
Christopher Faulet5d45e382019-02-27 15:15:23 +01004189 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
4190 appctx->st0 = STAT_HTTP_HEAD;
4191 else if (txn->meth == HTTP_METH_POST) {
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004192 if (appctx->ctx.stats.flags & STAT_ADMIN) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004193 appctx->st0 = STAT_HTTP_POST;
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004194 if (msg->msg_state < HTTP_MSG_DATA)
4195 req->analysers |= AN_REQ_HTTP_BODY;
4196 }
Christopher Faulet377c5a52018-10-24 21:21:30 +02004197 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004198 /* POST without admin level */
Christopher Faulet377c5a52018-10-24 21:21:30 +02004199 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4200 appctx->ctx.stats.st_code = STAT_STATUS_DENY;
4201 appctx->st0 = STAT_HTTP_LAST;
4202 }
4203 }
4204 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004205 /* Unsupported method */
4206 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4207 appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
4208 appctx->st0 = STAT_HTTP_LAST;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004209 }
4210
4211 s->task->nice = -32; /* small boost for HTTP statistics */
4212 return 1;
4213}
4214
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004215void http_perform_server_redirect(struct stream *s, struct stream_interface *si)
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004216{
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004217 struct channel *req = &s->req;
4218 struct channel *res = &s->res;
4219 struct server *srv;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004220 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004221 struct htx_sl *sl;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004222 struct ist path, location;
4223 unsigned int flags;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004224
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004225 /*
4226 * Create the location
4227 */
4228 chunk_reset(&trash);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004229
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004230 /* 1: add the server's prefix */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004231 /* special prefix "/" means don't change URL */
4232 srv = __objt_server(s->target);
4233 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
4234 if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len))
4235 return;
4236 }
4237
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004238 /* 2: add the request Path */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004239 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004240 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004241 path = http_get_path(htx_sl_req_uri(sl));
Tim Duesterhused526372020-03-05 17:56:33 +01004242 if (!isttest(path))
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004243 return;
4244
4245 if (!chunk_memcat(&trash, path.ptr, path.len))
4246 return;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004247 location = ist2(trash.area, trash.data);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004248
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004249 /*
4250 * Create the 302 respone
4251 */
4252 htx = htx_from_buf(&res->buf);
4253 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
4254 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4255 ist("HTTP/1.1"), ist("302"), ist("Found"));
4256 if (!sl)
4257 goto fail;
4258 sl->info.res.status = 302;
4259 s->txn->status = 302;
4260
4261 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
4262 !htx_add_header(htx, ist("Connection"), ist("close")) ||
4263 !htx_add_header(htx, ist("Content-length"), ist("0")) ||
4264 !htx_add_header(htx, ist("Location"), location))
4265 goto fail;
4266
4267 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
4268 goto fail;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004269
Christopher Fauletc20afb82020-01-24 19:16:26 +01004270 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004271 if (!http_forward_proxy_resp(s, 1))
4272 goto fail;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004273
4274 /* return without error. */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004275 si_shutr(si);
4276 si_shutw(si);
4277 si->err_type = SI_ET_NONE;
4278 si->state = SI_ST_CLO;
4279
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004280 if (!(s->flags & SF_ERR_MASK))
4281 s->flags |= SF_ERR_LOCAL;
4282 if (!(s->flags & SF_FINST_MASK))
4283 s->flags |= SF_FINST_C;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004284
4285 /* FIXME: we should increase a counter of redirects per server and per backend. */
4286 srv_inc_sess_ctr(srv);
4287 srv_set_sess_last(srv);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004288 return;
4289
4290 fail:
4291 /* If an error occurred, remove the incomplete HTTP response from the
4292 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004293 channel_htx_truncate(res, htx);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004294}
4295
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05004296/* This function terminates the request because it was completely analyzed or
Christopher Fauletf2824e62018-10-01 12:12:37 +02004297 * because an error was triggered during the body forwarding.
4298 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004299static void http_end_request(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004300{
4301 struct channel *chn = &s->req;
4302 struct http_txn *txn = s->txn;
4303
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004304 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004305
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004306 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4307 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004308 channel_abort(chn);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004309 channel_htx_truncate(chn, htxbuf(&chn->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02004310 goto end;
4311 }
4312
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004313 if (unlikely(txn->req.msg_state < HTTP_MSG_DONE)) {
4314 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004315 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004316 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004317
4318 if (txn->req.msg_state == HTTP_MSG_DONE) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004319 /* No need to read anymore, the request was completely parsed.
4320 * We can shut the read side unless we want to abort_on_close,
4321 * or we have a POST request. The issue with POST requests is
4322 * that some browsers still send a CRLF after the request, and
4323 * this CRLF must be read so that it does not remain in the kernel
4324 * buffers, otherwise a close could cause an RST on some systems
4325 * (eg: Linux).
4326 */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004327 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004328 channel_dont_read(chn);
4329
4330 /* if the server closes the connection, we want to immediately react
4331 * and close the socket to save packets and syscalls.
4332 */
4333 s->si[1].flags |= SI_FL_NOHALF;
4334
4335 /* In any case we've finished parsing the request so we must
4336 * disable Nagle when sending data because 1) we're not going
4337 * to shut this side, and 2) the server is waiting for us to
4338 * send pending data.
4339 */
4340 chn->flags |= CF_NEVER_WAIT;
4341
Christopher Fauletd01ce402019-01-02 17:44:13 +01004342 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
4343 /* The server has not finished to respond, so we
4344 * don't want to move in order not to upset it.
4345 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004346 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletd01ce402019-01-02 17:44:13 +01004347 return;
4348 }
4349
Christopher Fauletf2824e62018-10-01 12:12:37 +02004350 /* When we get here, it means that both the request and the
4351 * response have finished receiving. Depending on the connection
4352 * mode, we'll have to wait for the last bytes to leave in either
4353 * direction, and sometimes for a close to be effective.
4354 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004355 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004356 /* Tunnel mode will not have any analyser so it needs to
4357 * poll for reads.
4358 */
4359 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004360 if (b_data(&chn->buf)) {
4361 DBG_TRACE_DEVEL("waiting to flush the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Faulet9768c262018-10-22 09:34:31 +02004362 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004363 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004364 txn->req.msg_state = HTTP_MSG_TUNNEL;
4365 }
4366 else {
4367 /* we're not expecting any new data to come for this
4368 * transaction, so we can close it.
Christopher Faulet9768c262018-10-22 09:34:31 +02004369 *
4370 * However, there is an exception if the response
4371 * length is undefined. In this case, we need to wait
4372 * the close from the server. The response will be
4373 * switched in TUNNEL mode until the end.
Christopher Fauletf2824e62018-10-01 12:12:37 +02004374 */
4375 if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
4376 txn->rsp.msg_state != HTTP_MSG_CLOSED)
Christopher Faulet9768c262018-10-22 09:34:31 +02004377 goto check_channel_flags;
Christopher Fauletf2824e62018-10-01 12:12:37 +02004378
4379 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4380 channel_shutr_now(chn);
4381 channel_shutw_now(chn);
4382 }
4383 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004384 goto check_channel_flags;
4385 }
4386
4387 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4388 http_msg_closing:
4389 /* nothing else to forward, just waiting for the output buffer
4390 * to be empty and for the shutw_now to take effect.
4391 */
4392 if (channel_is_empty(chn)) {
4393 txn->req.msg_state = HTTP_MSG_CLOSED;
4394 goto http_msg_closed;
4395 }
4396 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004397 txn->req.msg_state = HTTP_MSG_ERROR;
4398 goto end;
4399 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004400 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004401 return;
4402 }
4403
4404 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4405 http_msg_closed:
Christopher Fauletf2824e62018-10-01 12:12:37 +02004406 /* if we don't know whether the server will close, we need to hard close */
4407 if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
4408 s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
Christopher Fauletf2824e62018-10-01 12:12:37 +02004409 /* see above in MSG_DONE why we only do this in these states */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004410 if (!(s->be->options & PR_O_ABRT_CLOSE))
Christopher Fauletf2824e62018-10-01 12:12:37 +02004411 channel_dont_read(chn);
4412 goto end;
4413 }
4414
4415 check_channel_flags:
4416 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4417 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4418 /* if we've just closed an output, let's switch */
4419 txn->req.msg_state = HTTP_MSG_CLOSING;
4420 goto http_msg_closing;
4421 }
4422
4423 end:
4424 chn->analysers &= AN_REQ_FLT_END;
4425 if (txn->req.msg_state == HTTP_MSG_TUNNEL && HAS_REQ_DATA_FILTERS(s))
4426 chn->analysers |= AN_REQ_FLT_XFER_DATA;
4427 channel_auto_close(chn);
4428 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004429 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004430}
4431
4432
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05004433/* This function terminates the response because it was completely analyzed or
Christopher Fauletf2824e62018-10-01 12:12:37 +02004434 * because an error was triggered during the body forwarding.
4435 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004436static void http_end_response(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004437{
4438 struct channel *chn = &s->res;
4439 struct http_txn *txn = s->txn;
4440
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004441 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004442
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004443 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4444 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004445 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004446 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004447 goto end;
4448 }
4449
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004450 if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE)) {
4451 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004452 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004453 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004454
4455 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4456 /* In theory, we don't need to read anymore, but we must
4457 * still monitor the server connection for a possible close
4458 * while the request is being uploaded, so we don't disable
4459 * reading.
4460 */
4461 /* channel_dont_read(chn); */
4462
4463 if (txn->req.msg_state < HTTP_MSG_DONE) {
4464 /* The client seems to still be sending data, probably
4465 * because we got an error response during an upload.
4466 * We have the choice of either breaking the connection
4467 * or letting it pass through. Let's do the later.
4468 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004469 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004470 return;
4471 }
4472
4473 /* When we get here, it means that both the request and the
4474 * response have finished receiving. Depending on the connection
4475 * mode, we'll have to wait for the last bytes to leave in either
4476 * direction, and sometimes for a close to be effective.
4477 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004478 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004479 channel_auto_read(chn);
4480 chn->flags |= CF_NEVER_WAIT;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004481 if (b_data(&chn->buf)) {
4482 DBG_TRACE_DEVEL("waiting to flush the respone", STRM_EV_HTTP_ANA, s, txn);
Christopher Faulet9768c262018-10-22 09:34:31 +02004483 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004484 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004485 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4486 }
4487 else {
4488 /* we're not expecting any new data to come for this
4489 * transaction, so we can close it.
4490 */
4491 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4492 channel_shutr_now(chn);
4493 channel_shutw_now(chn);
4494 }
4495 }
4496 goto check_channel_flags;
4497 }
4498
4499 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4500 http_msg_closing:
4501 /* nothing else to forward, just waiting for the output buffer
4502 * to be empty and for the shutw_now to take effect.
4503 */
4504 if (channel_is_empty(chn)) {
4505 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4506 goto http_msg_closed;
4507 }
4508 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004509 txn->rsp.msg_state = HTTP_MSG_ERROR;
Christopher Fauletcff0f732019-12-16 16:13:44 +01004510 _HA_ATOMIC_ADD(&strm_sess(s)->fe->fe_counters.cli_aborts, 1);
Olivier Houcharda798bf52019-03-08 18:52:00 +01004511 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01004512 if (strm_sess(s)->listener->counters)
4513 _HA_ATOMIC_ADD(&strm_sess(s)->listener->counters->cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004514 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01004515 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004516 goto end;
4517 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004518 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004519 return;
4520 }
4521
4522 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4523 http_msg_closed:
4524 /* drop any pending data */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004525 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004526 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004527 goto end;
4528 }
4529
4530 check_channel_flags:
4531 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4532 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4533 /* if we've just closed an output, let's switch */
4534 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4535 goto http_msg_closing;
4536 }
4537
4538 end:
4539 chn->analysers &= AN_RES_FLT_END;
4540 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL && HAS_RSP_DATA_FILTERS(s))
4541 chn->analysers |= AN_RES_FLT_XFER_DATA;
4542 channel_auto_close(chn);
4543 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004544 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004545}
4546
Christopher Fauletef70e252020-01-28 09:26:19 +01004547/* Forward a response generated by HAProxy (error/redirect/return). This
4548 * function forwards all pending incoming data. If <final> is set to 0, nothing
4549 * more is performed. It is used for 1xx informational messages. Otherwise, the
Christopher Faulet507479b2020-05-15 12:29:46 +02004550 * transaction is terminated and the request is emptied. On success 1 is
4551 * returned. If an error occurred, 0 is returned.
Christopher Fauletef70e252020-01-28 09:26:19 +01004552 */
4553int http_forward_proxy_resp(struct stream *s, int final)
4554{
4555 struct channel *req = &s->req;
4556 struct channel *res = &s->res;
4557 struct htx *htx = htxbuf(&res->buf);
4558 size_t data;
4559
4560 if (final) {
4561 htx->flags |= HTX_FL_PROXY_RESP;
Christopher Faulet507479b2020-05-15 12:29:46 +02004562
4563 if (!http_eval_after_res_rules(s))
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01004564 return 0;
Christopher Fauletef70e252020-01-28 09:26:19 +01004565
4566 channel_auto_read(req);
4567 channel_abort(req);
4568 channel_auto_close(req);
4569 channel_htx_erase(req, htxbuf(&req->buf));
4570
4571 res->wex = tick_add_ifset(now_ms, res->wto);
4572 channel_auto_read(res);
4573 channel_auto_close(res);
4574 channel_shutr_now(res);
4575 }
4576
4577 data = htx->data - co_data(res);
4578 c_adv(res, data);
4579 htx->first = -1;
4580 res->total += data;
4581 return 1;
4582}
4583
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004584void http_server_error(struct stream *s, struct stream_interface *si, int err,
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004585 int finst, struct http_reply *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004586{
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004587 http_reply_and_close(s, s->txn->status, msg);
Christopher Faulet0f226952018-10-22 09:29:56 +02004588 if (!(s->flags & SF_ERR_MASK))
4589 s->flags |= err;
4590 if (!(s->flags & SF_FINST_MASK))
4591 s->flags |= finst;
4592}
4593
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004594void http_reply_and_close(struct stream *s, short status, struct http_reply *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004595{
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004596 if (!msg) {
4597 channel_htx_truncate(&s->res, htxbuf(&s->res.buf));
4598 goto end;
4599 }
4600
4601 if (http_reply_message(s, msg) == -1) {
4602 /* On error, return a 500 error message, but don't rewrite it if
4603 * it is already an internal error.
4604 */
4605 if (s->txn->status == 500)
4606 s->txn->flags |= TX_CONST_REPLY;
4607 s->txn->status = 500;
4608 s->txn->http_reply = NULL;
4609 return http_reply_and_close(s, s->txn->status, http_error_message(s));
4610 }
4611
4612end:
4613 s->res.wex = tick_add_ifset(now_ms, s->res.wto);
4614 s->txn->flags &= ~TX_WAIT_NEXT_RQ;
4615
Christopher Faulet0f226952018-10-22 09:29:56 +02004616 channel_auto_read(&s->req);
4617 channel_abort(&s->req);
4618 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004619 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004620 channel_auto_read(&s->res);
4621 channel_auto_close(&s->res);
4622 channel_shutr_now(&s->res);
Christopher Faulet0f226952018-10-22 09:29:56 +02004623}
4624
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004625struct http_reply *http_error_message(struct stream *s)
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004626{
4627 const int msgnum = http_get_status_idx(s->txn->status);
4628
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004629 if (s->txn->http_reply)
4630 return s->txn->http_reply;
4631 else if (s->be->replies[msgnum])
4632 return s->be->replies[msgnum];
4633 else if (strm_fe(s)->replies[msgnum])
4634 return strm_fe(s)->replies[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004635 else
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004636 return &http_err_replies[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004637}
4638
Christopher Faulet97e466c2020-05-15 15:12:47 +02004639/* Produces an HTX message from an http reply. Depending on the http reply type, a,
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004640 * errorfile, an raw file or a log-format string is used. On success, it returns
4641 * 0. If an error occurs -1 is returned.
4642 */
Christopher Fauletae43b6c2020-05-27 15:24:22 +02004643int http_reply_to_htx(struct stream *s, struct htx *htx, struct http_reply *reply)
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004644{
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004645 struct buffer *errmsg;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004646 struct htx_sl *sl;
4647 struct buffer *body = NULL;
4648 const char *status, *reason, *clen, *ctype;
4649 unsigned int slflags;
4650 int ret = 0;
4651
Christopher Faulete29a97e2020-05-14 14:49:25 +02004652 /*
4653 * - HTTP_REPLY_ERRFILES unexpected here. handled as no payload if so
4654 *
4655 * - HTTP_REPLY_INDIRECT: switch on another reply if defined or handled
4656 * as no payload if NULL. the TXN status code is set with the status
4657 * of the original reply.
4658 */
4659
4660 if (reply->type == HTTP_REPLY_INDIRECT) {
4661 if (reply->body.reply)
4662 reply = reply->body.reply;
4663 }
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004664 if (reply->type == HTTP_REPLY_ERRMSG && !reply->body.errmsg) {
4665 /* get default error message */
4666 if (reply == s->txn->http_reply)
4667 s->txn->http_reply = NULL;
4668 reply = http_error_message(s);
4669 if (reply->type == HTTP_REPLY_INDIRECT) {
4670 if (reply->body.reply)
4671 reply = reply->body.reply;
4672 }
4673 }
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004674
4675 if (reply->type == HTTP_REPLY_ERRMSG) {
4676 /* implicit or explicit error message*/
4677 errmsg = reply->body.errmsg;
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004678 if (errmsg && !b_is_null(errmsg)) {
Christopher Faulet20567362020-05-15 14:52:49 +02004679 if (!htx_copy_msg(htx, errmsg))
Christopher Faulet8dfeccf2020-05-15 14:16:29 +02004680 goto fail;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004681 }
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004682 }
4683 else {
4684 /* no payload, file or log-format string */
4685 if (reply->type == HTTP_REPLY_RAW) {
4686 /* file */
4687 body = &reply->body.obj;
4688 }
4689 else if (reply->type == HTTP_REPLY_LOGFMT) {
4690 /* log-format string */
4691 body = alloc_trash_chunk();
4692 if (!body)
4693 goto fail_alloc;
4694 body->data = build_logline(s, body->area, body->size, &reply->body.fmt);
4695 }
4696 /* else no payload */
4697
4698 status = ultoa(reply->status);
4699 reason = http_get_reason(reply->status);
4700 slflags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_CLEN);
4701 if (!body || !b_data(body))
4702 slflags |= HTX_SL_F_BODYLESS;
4703 sl = htx_add_stline(htx, HTX_BLK_RES_SL, slflags, ist("HTTP/1.1"), ist(status), ist(reason));
4704 if (!sl)
4705 goto fail;
4706 sl->info.res.status = reply->status;
4707
4708 clen = (body ? ultoa(b_data(body)) : "0");
4709 ctype = reply->ctype;
4710
4711 if (!LIST_ISEMPTY(&reply->hdrs)) {
4712 struct http_reply_hdr *hdr;
4713 struct buffer *value = alloc_trash_chunk();
4714
4715 if (!value)
4716 goto fail;
4717
4718 list_for_each_entry(hdr, &reply->hdrs, list) {
4719 chunk_reset(value);
4720 value->data = build_logline(s, value->area, value->size, &hdr->value);
4721 if (b_data(value) && !htx_add_header(htx, hdr->name, ist2(b_head(value), b_data(value)))) {
4722 free_trash_chunk(value);
4723 goto fail;
4724 }
4725 chunk_reset(value);
4726 }
4727 free_trash_chunk(value);
4728 }
4729
4730 if (!htx_add_header(htx, ist("content-length"), ist(clen)) ||
4731 (body && b_data(body) && ctype && !htx_add_header(htx, ist("content-type"), ist(ctype))) ||
4732 !htx_add_endof(htx, HTX_BLK_EOH) ||
4733 (body && b_data(body) && !htx_add_data_atonce(htx, ist2(b_head(body), b_data(body)))) ||
4734 !htx_add_endof(htx, HTX_BLK_EOM))
4735 goto fail;
4736 }
4737
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004738 leave:
4739 if (reply->type == HTTP_REPLY_LOGFMT)
4740 free_trash_chunk(body);
4741 return ret;
4742
4743 fail_alloc:
4744 if (!(s->flags & SF_ERR_MASK))
4745 s->flags |= SF_ERR_RESOURCE;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004746 /* fall through */
4747 fail:
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004748 ret = -1;
4749 goto leave;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004750}
4751
4752/* Send an http reply to the client. On success, it returns 0. If an error
4753 * occurs -1 is returned.
4754 */
4755int http_reply_message(struct stream *s, struct http_reply *reply)
4756{
4757 struct channel *res = &s->res;
4758 struct htx *htx = htx_from_buf(&res->buf);
4759
4760 if (s->txn->status == -1)
4761 s->txn->status = reply->status;
4762 channel_htx_truncate(res, htx);
4763
4764 if (http_reply_to_htx(s, htx, reply) == -1)
4765 goto fail;
4766
4767 htx_to_buf(htx, &s->res.buf);
4768 if (!http_forward_proxy_resp(s, 1))
4769 goto fail;
4770 return 0;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004771
4772 fail:
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004773 channel_htx_truncate(res, htx);
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004774 if (!(s->flags & SF_ERR_MASK))
4775 s->flags |= SF_ERR_PRXCOND;
Christopher Faulet97e466c2020-05-15 15:12:47 +02004776 return -1;
Christopher Faulet0e2ad612020-05-13 16:38:37 +02004777}
4778
Christopher Faulet304cc402019-07-15 15:46:28 +02004779/* Return the error message corresponding to si->err_type. It is assumed
4780 * that the server side is closed. Note that err_type is actually a
4781 * bitmask, where almost only aborts may be cumulated with other
4782 * values. We consider that aborted operations are more important
4783 * than timeouts or errors due to the fact that nobody else in the
4784 * logs might explain incomplete retries. All others should avoid
4785 * being cumulated. It should normally not be possible to have multiple
4786 * aborts at once, but just in case, the first one in sequence is reported.
4787 * Note that connection errors appearing on the second request of a keep-alive
4788 * connection are not reported since this allows the client to retry.
4789 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004790void http_return_srv_error(struct stream *s, struct stream_interface *si)
Christopher Faulet304cc402019-07-15 15:46:28 +02004791{
4792 int err_type = si->err_type;
4793
4794 /* set s->txn->status for http_error_message(s) */
4795 s->txn->status = 503;
4796
4797 if (err_type & SI_ET_QUEUE_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004798 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_Q,
4799 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004800 else if (err_type & SI_ET_CONN_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004801 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_C,
4802 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4803 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004804 else if (err_type & SI_ET_QUEUE_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004805 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_Q,
4806 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004807 else if (err_type & SI_ET_QUEUE_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004808 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_Q,
4809 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004810 else if (err_type & SI_ET_CONN_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004811 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_C,
4812 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4813 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004814 else if (err_type & SI_ET_CONN_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004815 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_C,
4816 (s->flags & SF_SRV_REUSED) ? NULL :
4817 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004818 else if (err_type & SI_ET_CONN_RES)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004819 http_server_error(s, si, SF_ERR_RESOURCE, SF_FINST_C,
4820 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4821 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004822 else { /* SI_ET_CONN_OTHER and others */
4823 s->txn->status = 500;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004824 http_server_error(s, si, SF_ERR_INTERNAL, SF_FINST_C,
4825 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004826 }
4827}
4828
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004829
Christopher Faulet4a28a532019-03-01 11:19:40 +01004830/* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0
4831 * on success and -1 on error.
4832 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004833static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004834{
4835 /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
4836 * then we must send an HTTP/1.1 100 Continue intermediate response.
4837 */
4838 if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
4839 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
4840 struct ist hdr = { .ptr = "Expect", .len = 6 };
4841 struct http_hdr_ctx ctx;
4842
4843 ctx.blk = NULL;
4844 /* Expect is allowed in 1.1, look for it */
4845 if (http_find_header(htx, hdr, &ctx, 0) &&
4846 unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004847 if (http_reply_100_continue(s) == -1)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004848 return -1;
4849 http_remove_header(htx, &ctx);
4850 }
4851 }
4852 return 0;
4853}
4854
Christopher Faulet23a3c792018-11-28 10:01:23 +01004855/* Send a 100-Continue response to the client. It returns 0 on success and -1
4856 * on error. The response channel is updated accordingly.
4857 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004858static int http_reply_100_continue(struct stream *s)
Christopher Faulet23a3c792018-11-28 10:01:23 +01004859{
4860 struct channel *res = &s->res;
4861 struct htx *htx = htx_from_buf(&res->buf);
4862 struct htx_sl *sl;
4863 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
4864 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004865
4866 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4867 ist("HTTP/1.1"), ist("100"), ist("Continue"));
4868 if (!sl)
4869 goto fail;
4870 sl->info.res.status = 100;
4871
Christopher Faulet1d5ec092019-06-26 14:23:54 +02004872 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet23a3c792018-11-28 10:01:23 +01004873 goto fail;
4874
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004875 if (!http_forward_proxy_resp(s, 0))
4876 goto fail;
Christopher Faulet23a3c792018-11-28 10:01:23 +01004877 return 0;
4878
4879 fail:
4880 /* If an error occurred, remove the incomplete HTTP response from the
4881 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004882 channel_htx_truncate(res, htx);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004883 return -1;
4884}
4885
Christopher Faulet12c51e22018-11-28 15:59:42 +01004886
Christopher Faulet0f226952018-10-22 09:29:56 +02004887/*
4888 * Capture headers from message <htx> according to header list <cap_hdr>, and
4889 * fill the <cap> pointers appropriately.
4890 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004891static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
Christopher Faulet0f226952018-10-22 09:29:56 +02004892{
4893 struct cap_hdr *h;
4894 int32_t pos;
4895
Christopher Fauleta3f15502019-05-13 15:27:23 +02004896 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02004897 struct htx_blk *blk = htx_get_blk(htx, pos);
4898 enum htx_blk_type type = htx_get_blk_type(blk);
4899 struct ist n, v;
4900
4901 if (type == HTX_BLK_EOH)
4902 break;
4903 if (type != HTX_BLK_HDR)
4904 continue;
4905
4906 n = htx_get_blk_name(htx, blk);
4907
4908 for (h = cap_hdr; h; h = h->next) {
4909 if (h->namelen && (h->namelen == n.len) &&
4910 (strncasecmp(n.ptr, h->name, h->namelen) == 0)) {
4911 if (cap[h->index] == NULL)
4912 cap[h->index] =
4913 pool_alloc(h->pool);
4914
4915 if (cap[h->index] == NULL) {
4916 ha_alert("HTTP capture : out of memory.\n");
4917 break;
4918 }
4919
4920 v = htx_get_blk_value(htx, blk);
4921 if (v.len > h->len)
4922 v.len = h->len;
4923
4924 memcpy(cap[h->index], v.ptr, v.len);
4925 cap[h->index][v.len]=0;
4926 }
4927 }
4928 }
4929}
4930
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02004931/* Delete a value in a header between delimiters <from> and <next>. The header
4932 * itself is delimited by <start> and <end> pointers. The number of characters
4933 * displaced is returned, and the pointer to the first delimiter is updated if
4934 * required. The function tries as much as possible to respect the following
4935 * principles :
4936 * - replace <from> delimiter by the <next> one unless <from> points to <start>,
4937 * in which case <next> is simply removed
4938 * - set exactly one space character after the new first delimiter, unless there
4939 * are not enough characters in the block being moved to do so.
4940 * - remove unneeded spaces before the previous delimiter and after the new
4941 * one.
4942 *
4943 * It is the caller's responsibility to ensure that :
4944 * - <from> points to a valid delimiter or <start> ;
4945 * - <next> points to a valid delimiter or <end> ;
4946 * - there are non-space chars before <from>.
4947 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004948static int http_del_hdr_value(char *start, char *end, char **from, char *next)
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02004949{
4950 char *prev = *from;
4951
4952 if (prev == start) {
4953 /* We're removing the first value. eat the semicolon, if <next>
4954 * is lower than <end> */
4955 if (next < end)
4956 next++;
4957
4958 while (next < end && HTTP_IS_SPHT(*next))
4959 next++;
4960 }
4961 else {
4962 /* Remove useless spaces before the old delimiter. */
4963 while (HTTP_IS_SPHT(*(prev-1)))
4964 prev--;
4965 *from = prev;
4966
4967 /* copy the delimiter and if possible a space if we're
4968 * not at the end of the line.
4969 */
4970 if (next < end) {
4971 *prev++ = *next++;
4972 if (prev + 1 < next)
4973 *prev++ = ' ';
4974 while (next < end && HTTP_IS_SPHT(*next))
4975 next++;
4976 }
4977 }
4978 memmove(prev, next, end - next);
4979 return (prev - next);
4980}
4981
Christopher Faulet0f226952018-10-22 09:29:56 +02004982
4983/* Formats the start line of the request (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08004984 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Faulet0f226952018-10-22 09:29:56 +02004985 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004986static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Faulet0f226952018-10-22 09:29:56 +02004987{
4988 struct ist dst = ist2(str, 0);
4989
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004990 if (istcat(&dst, htx_sl_req_meth(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02004991 goto end;
4992 if (dst.len + 1 > len)
4993 goto end;
4994 dst.ptr[dst.len++] = ' ';
4995
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004996 if (istcat(&dst, htx_sl_req_uri(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02004997 goto end;
4998 if (dst.len + 1 > len)
4999 goto end;
5000 dst.ptr[dst.len++] = ' ';
5001
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005002 istcat(&dst, htx_sl_req_vsn(sl), len);
Christopher Faulet0f226952018-10-22 09:29:56 +02005003 end:
5004 return dst.len;
5005}
5006
5007/*
5008 * Print a debug line with a start line.
5009 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005010static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl)
Christopher Faulet0f226952018-10-22 09:29:56 +02005011{
5012 struct session *sess = strm_sess(s);
5013 int max;
5014
5015 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5016 dir,
5017 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
5018 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
5019
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005020 max = HTX_SL_P1_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005021 UBOUND(max, trash.size - trash.data - 3);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005022 chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005023 trash.area[trash.data++] = ' ';
5024
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005025 max = HTX_SL_P2_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005026 UBOUND(max, trash.size - trash.data - 2);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005027 chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005028 trash.area[trash.data++] = ' ';
5029
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005030 max = HTX_SL_P3_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005031 UBOUND(max, trash.size - trash.data - 1);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005032 chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005033 trash.area[trash.data++] = '\n';
5034
Willy Tarreau2e8ab6b2020-03-14 11:03:20 +01005035 DISGUISE(write(1, trash.area, trash.data));
Christopher Faulet0f226952018-10-22 09:29:56 +02005036}
5037
5038/*
5039 * Print a debug line with a header.
5040 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005041static 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 +02005042{
5043 struct session *sess = strm_sess(s);
5044 int max;
5045
5046 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5047 dir,
5048 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
5049 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
5050
5051 max = n.len;
5052 UBOUND(max, trash.size - trash.data - 3);
5053 chunk_memcat(&trash, n.ptr, max);
5054 trash.area[trash.data++] = ':';
5055 trash.area[trash.data++] = ' ';
5056
5057 max = v.len;
5058 UBOUND(max, trash.size - trash.data - 1);
5059 chunk_memcat(&trash, v.ptr, max);
5060 trash.area[trash.data++] = '\n';
5061
Willy Tarreau2e8ab6b2020-03-14 11:03:20 +01005062 DISGUISE(write(1, trash.area, trash.data));
Christopher Faulet0f226952018-10-22 09:29:56 +02005063}
5064
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005065/* Allocate a new HTTP transaction for stream <s> unless there is one already.
5066 * In case of allocation failure, everything allocated is freed and NULL is
5067 * returned. Otherwise the new transaction is assigned to the stream and
5068 * returned.
5069 */
5070struct http_txn *http_alloc_txn(struct stream *s)
5071{
5072 struct http_txn *txn = s->txn;
5073
5074 if (txn)
5075 return txn;
5076
5077 txn = pool_alloc(pool_head_http_txn);
5078 if (!txn)
5079 return txn;
5080
5081 s->txn = txn;
5082 return txn;
5083}
5084
5085void http_txn_reset_req(struct http_txn *txn)
5086{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005087 txn->req.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005088 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
5089}
5090
5091void http_txn_reset_res(struct http_txn *txn)
5092{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005093 txn->rsp.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005094 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
5095}
5096
5097/*
5098 * Initialize a new HTTP transaction for stream <s>. It is assumed that all
5099 * the required fields are properly allocated and that we only need to (re)init
5100 * them. This should be used before processing any new request.
5101 */
5102void http_init_txn(struct stream *s)
5103{
5104 struct http_txn *txn = s->txn;
5105 struct conn_stream *cs = objt_cs(s->si[0].end);
5106
5107 txn->flags = ((cs && cs->flags & CS_FL_NOT_FIRST)
5108 ? (TX_NOT_FIRST|TX_WAIT_NEXT_RQ)
5109 : 0);
5110 txn->status = -1;
Christopher Faulet5cb513a2020-05-13 17:56:56 +02005111 txn->http_reply = NULL;
Willy Tarreau8b507582020-02-25 09:35:07 +01005112 write_u32(txn->cache_hash, 0);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005113
5114 txn->cookie_first_date = 0;
5115 txn->cookie_last_date = 0;
5116
5117 txn->srv_cookie = NULL;
5118 txn->cli_cookie = NULL;
5119 txn->uri = NULL;
5120
5121 http_txn_reset_req(txn);
5122 http_txn_reset_res(txn);
5123
5124 txn->req.chn = &s->req;
5125 txn->rsp.chn = &s->res;
5126
5127 txn->auth.method = HTTP_AUTH_UNKNOWN;
5128
5129 vars_init(&s->vars_txn, SCOPE_TXN);
5130 vars_init(&s->vars_reqres, SCOPE_REQ);
5131}
5132
5133/* to be used at the end of a transaction */
5134void http_end_txn(struct stream *s)
5135{
5136 struct http_txn *txn = s->txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005137
5138 /* these ones will have been dynamically allocated */
5139 pool_free(pool_head_requri, txn->uri);
5140 pool_free(pool_head_capture, txn->cli_cookie);
5141 pool_free(pool_head_capture, txn->srv_cookie);
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005142 pool_free(pool_head_uniqueid, s->unique_id.ptr);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005143
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005144 s->unique_id = IST_NULL;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005145 txn->uri = NULL;
5146 txn->srv_cookie = NULL;
5147 txn->cli_cookie = NULL;
5148
Christopher Faulet59399252019-11-07 14:27:52 +01005149 if (!LIST_ISEMPTY(&s->vars_txn.head))
5150 vars_prune(&s->vars_txn, s->sess, s);
5151 if (!LIST_ISEMPTY(&s->vars_reqres.head))
5152 vars_prune(&s->vars_reqres, s->sess, s);
5153}
5154
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005155
5156DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn));
Christopher Faulet0f226952018-10-22 09:29:56 +02005157
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005158__attribute__((constructor))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005159static void __http_protocol_init(void)
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005160{
5161}
5162
5163
5164/*
5165 * Local variables:
5166 * c-indent-level: 8
5167 * c-basic-offset: 8
5168 * End:
5169 */