blob: 88f7937b194846d7f8396f2c3209794c9efdd683 [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
Christopher Faulete0768eb2018-10-03 16:38:02 +020013#include <common/base64.h>
14#include <common/config.h>
15#include <common/debug.h>
Willy Tarreaub96b77e2018-12-11 10:22:41 +010016#include <common/htx.h>
Willy Tarreau8b507582020-02-25 09:35:07 +010017#include <common/net_helper.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020018#include <common/uri_auth.h>
19
Christopher Faulet0f226952018-10-22 09:29:56 +020020#include <types/capture.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020021
22#include <proto/acl.h>
Christopher Faulet3e964192018-10-24 11:39:23 +020023#include <proto/action.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020024#include <proto/channel.h>
25#include <proto/checks.h>
26#include <proto/connection.h>
27#include <proto/filters.h>
Christopher Faulet0f226952018-10-22 09:29:56 +020028#include <proto/http_htx.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020029#include <proto/log.h>
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020030#include <proto/http_ana.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020031#include <proto/proxy.h>
Christopher Fauletfefc73d2018-10-24 21:18:04 +020032#include <proto/server.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020033#include <proto/stream.h>
34#include <proto/stream_interface.h>
35#include <proto/stats.h>
Christopher Fauleta8a46e22019-07-16 14:53:09 +020036#include <proto/vars.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020037
Christopher Fauleteea8fc72019-11-05 16:18:10 +010038#define TRACE_SOURCE &trace_strm
39
Christopher Faulet377c5a52018-10-24 21:21:30 +020040extern const char *stat_status_codes[];
Christopher Fauletf2824e62018-10-01 12:12:37 +020041
Christopher Fauleta8a46e22019-07-16 14:53:09 +020042struct pool_head *pool_head_requri = NULL;
43struct pool_head *pool_head_capture = NULL;
44
45
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020046static void http_end_request(struct stream *s);
47static void http_end_response(struct stream *s);
Christopher Fauletf2824e62018-10-01 12:12:37 +020048
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020049static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr);
50static int http_del_hdr_value(char *start, char *end, char **from, char *next);
51static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len);
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020052static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl);
53static 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 +020054
Christopher Fauletb58f62b2020-01-13 16:40:13 +010055static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020056static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
Christopher Faulet3e964192018-10-24 11:39:23 +020057
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020058static void http_manage_client_side_cookies(struct stream *s, struct channel *req);
59static void http_manage_server_side_cookies(struct stream *s, struct channel *res);
Christopher Fauletfcda7c62018-10-24 11:56:22 +020060
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020061static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend);
62static int http_handle_stats(struct stream *s, struct channel *req);
Christopher Faulet377c5a52018-10-24 21:21:30 +020063
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020064static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg);
65static int http_reply_100_continue(struct stream *s);
66static int http_reply_40x_unauthorized(struct stream *s, const char *auth_realm);
Christopher Faulet23a3c792018-11-28 10:01:23 +010067
Christopher Faulete0768eb2018-10-03 16:38:02 +020068/* This stream analyser waits for a complete HTTP request. It returns 1 if the
69 * processing can continue on next analysers, or zero if it either needs more
70 * data or wants to immediately abort the request (eg: timeout, error, ...). It
71 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req.analysers
72 * when it has nothing left to do, and may remove any analyser when it wants to
73 * abort.
74 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020075int http_wait_for_request(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +020076{
Christopher Faulet9768c262018-10-22 09:34:31 +020077
Christopher Faulete0768eb2018-10-03 16:38:02 +020078 /*
Christopher Faulet9768c262018-10-22 09:34:31 +020079 * We will analyze a complete HTTP request to check the its syntax.
Christopher Faulete0768eb2018-10-03 16:38:02 +020080 *
Christopher Faulet9768c262018-10-22 09:34:31 +020081 * Once the start line and all headers are received, we may perform a
82 * capture of the error (if any), and we will set a few fields. We also
83 * check for monitor-uri, logging and finally headers capture.
Christopher Faulete0768eb2018-10-03 16:38:02 +020084 */
Christopher Faulete0768eb2018-10-03 16:38:02 +020085 struct session *sess = s->sess;
86 struct http_txn *txn = s->txn;
87 struct http_msg *msg = &txn->req;
Christopher Faulet9768c262018-10-22 09:34:31 +020088 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +010089 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +020090
Christopher Fauleteea8fc72019-11-05 16:18:10 +010091 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +020092
Christopher Faulet27ba2dc2018-12-05 11:53:24 +010093 htx = htxbuf(&req->buf);
Christopher Faulet9768c262018-10-22 09:34:31 +020094
Willy Tarreau4236f032019-03-05 10:43:32 +010095 /* Parsing errors are caught here */
Christopher Fauletb9a92f32019-09-09 10:15:21 +020096 if (htx->flags & (HTX_FL_PARSING_ERROR|HTX_FL_PROCESSING_ERROR)) {
Willy Tarreau4236f032019-03-05 10:43:32 +010097 stream_inc_http_req_ctr(s);
98 stream_inc_http_err_ctr(s);
99 proxy_inc_fe_req_ctr(sess->fe);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200100 if (htx->flags & HTX_FL_PARSING_ERROR)
101 goto return_bad_req;
102 else
103 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +0100104 }
105
Christopher Faulete0768eb2018-10-03 16:38:02 +0200106 /* we're speaking HTTP here, so let's speak HTTP to the client */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200107 s->srv_error = http_return_srv_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200108
109 /* If there is data available for analysis, log the end of the idle time. */
Christopher Faulet870aad92018-11-29 15:23:46 +0100110 if (c_data(req) && s->logs.t_idle == -1) {
111 const struct cs_info *csinfo = si_get_cs_info(objt_cs(s->si[0].end));
112
113 s->logs.t_idle = ((csinfo)
114 ? csinfo->t_idle
115 : tv_ms_elapsed(&s->logs.tv_accept, &now) - s->logs.t_handshake);
116 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200117
Christopher Faulete0768eb2018-10-03 16:38:02 +0200118 /*
119 * Now we quickly check if we have found a full valid request.
120 * If not so, we check the FD and buffer states before leaving.
121 * A full request is indicated by the fact that we have seen
122 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
123 * requests are checked first. When waiting for a second request
124 * on a keep-alive stream, if we encounter and error, close, t/o,
125 * we note the error in the stream flags but don't set any state.
126 * Since the error will be noted there, it will not be counted by
127 * process_stream() as a frontend error.
128 * Last, we may increase some tracked counters' http request errors on
129 * the cases that are deliberately the client's fault. For instance,
130 * a timeout or connection reset is not counted as an error. However
131 * a bad request is.
132 */
Christopher Faulet29f17582019-05-23 11:03:26 +0200133 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
Christopher Faulet0ef372a2019-04-08 10:57:20 +0200134 if (htx->flags & HTX_FL_UPGRADE)
135 goto failed_keep_alive;
136
Christopher Faulet9768c262018-10-22 09:34:31 +0200137 /* 1: have we encountered a read error ? */
138 if (req->flags & CF_READ_ERROR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200139 if (!(s->flags & SF_ERR_MASK))
140 s->flags |= SF_ERR_CLICL;
141
142 if (txn->flags & TX_WAIT_NEXT_RQ)
143 goto failed_keep_alive;
144
145 if (sess->fe->options & PR_O_IGNORE_PRB)
146 goto failed_keep_alive;
147
Christopher Faulet9768c262018-10-22 09:34:31 +0200148 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200149 stream_inc_http_req_ctr(s);
150 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100151 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200152 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100153 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200154
Christopher Faulet9768c262018-10-22 09:34:31 +0200155 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200156 http_reply_and_close(s, txn->status, NULL);
Christopher Faulet9768c262018-10-22 09:34:31 +0200157 req->analysers &= AN_REQ_FLT_END;
158
Christopher Faulete0768eb2018-10-03 16:38:02 +0200159 if (!(s->flags & SF_FINST_MASK))
160 s->flags |= SF_FINST_R;
161 return 0;
162 }
163
Christopher Faulet9768c262018-10-22 09:34:31 +0200164 /* 2: has the read timeout expired ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200165 else if (req->flags & CF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
166 if (!(s->flags & SF_ERR_MASK))
167 s->flags |= SF_ERR_CLITO;
168
169 if (txn->flags & TX_WAIT_NEXT_RQ)
170 goto failed_keep_alive;
171
172 if (sess->fe->options & PR_O_IGNORE_PRB)
173 goto failed_keep_alive;
174
Christopher Faulet9768c262018-10-22 09:34:31 +0200175 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200176 stream_inc_http_req_ctr(s);
177 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100178 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200179 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100180 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200181
Christopher Faulet9768c262018-10-22 09:34:31 +0200182 txn->status = 408;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200183 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200184 req->analysers &= AN_REQ_FLT_END;
185
Christopher Faulete0768eb2018-10-03 16:38:02 +0200186 if (!(s->flags & SF_FINST_MASK))
187 s->flags |= SF_FINST_R;
188 return 0;
189 }
190
Christopher Faulet9768c262018-10-22 09:34:31 +0200191 /* 3: have we encountered a close ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200192 else if (req->flags & CF_SHUTR) {
193 if (!(s->flags & SF_ERR_MASK))
194 s->flags |= SF_ERR_CLICL;
195
196 if (txn->flags & TX_WAIT_NEXT_RQ)
197 goto failed_keep_alive;
198
199 if (sess->fe->options & PR_O_IGNORE_PRB)
200 goto failed_keep_alive;
201
Christopher Faulete0768eb2018-10-03 16:38:02 +0200202 stream_inc_http_err_ctr(s);
203 stream_inc_http_req_ctr(s);
204 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100205 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200206 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100207 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200208
Christopher Faulet9768c262018-10-22 09:34:31 +0200209 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200210 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200211 req->analysers &= AN_REQ_FLT_END;
212
Christopher Faulete0768eb2018-10-03 16:38:02 +0200213 if (!(s->flags & SF_FINST_MASK))
214 s->flags |= SF_FINST_R;
215 return 0;
216 }
217
218 channel_dont_connect(req);
219 req->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
220 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100221
Christopher Faulet9768c262018-10-22 09:34:31 +0200222 if (sess->listener->options & LI_O_NOQUICKACK && htx_is_not_empty(htx) &&
Christopher Faulete0768eb2018-10-03 16:38:02 +0200223 objt_conn(sess->origin) && conn_ctrl_ready(__objt_conn(sess->origin))) {
224 /* We need more data, we have to re-enable quick-ack in case we
225 * previously disabled it, otherwise we might cause the client
226 * to delay next data.
227 */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100228 conn_set_quickack(objt_conn(sess->origin), 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200229 }
Willy Tarreau1a18b542018-12-11 16:37:42 +0100230
Christopher Faulet47365272018-10-31 17:40:50 +0100231 if ((req->flags & CF_READ_PARTIAL) && (txn->flags & TX_WAIT_NEXT_RQ)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200232 /* If the client starts to talk, let's fall back to
233 * request timeout processing.
234 */
235 txn->flags &= ~TX_WAIT_NEXT_RQ;
236 req->analyse_exp = TICK_ETERNITY;
237 }
238
239 /* just set the request timeout once at the beginning of the request */
240 if (!tick_isset(req->analyse_exp)) {
Christopher Faulet47365272018-10-31 17:40:50 +0100241 if ((txn->flags & TX_WAIT_NEXT_RQ) && tick_isset(s->be->timeout.httpka))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200242 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
243 else
244 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
245 }
246
247 /* we're not ready yet */
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100248 DBG_TRACE_DEVEL("waiting for the request",
249 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200250 return 0;
251
252 failed_keep_alive:
253 /* Here we process low-level errors for keep-alive requests. In
254 * short, if the request is not the first one and it experiences
255 * a timeout, read error or shutdown, we just silently close so
256 * that the client can try again.
257 */
258 txn->status = 0;
259 msg->msg_state = HTTP_MSG_RQBEFORE;
260 req->analysers &= AN_REQ_FLT_END;
261 s->logs.logwait = 0;
262 s->logs.level = 0;
263 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200264 http_reply_and_close(s, txn->status, NULL);
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100265 DBG_TRACE_DEVEL("leaving by closing K/A connection",
266 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200267 return 0;
268 }
269
Christopher Faulet9768c262018-10-22 09:34:31 +0200270 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200271 stream_inc_http_req_ctr(s);
272 proxy_inc_fe_req_ctr(sess->fe); /* one more valid request for this FE */
273
Christopher Faulet9768c262018-10-22 09:34:31 +0200274 /* kill the pending keep-alive timeout */
275 txn->flags &= ~TX_WAIT_NEXT_RQ;
276 req->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200277
Christopher Faulet29f17582019-05-23 11:03:26 +0200278 BUG_ON(htx_get_first_type(htx) != HTX_BLK_REQ_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +0200279 sl = http_get_stline(htx);
Christopher Faulet03599112018-11-27 11:21:21 +0100280
Christopher Faulet9768c262018-10-22 09:34:31 +0200281 /* 0: we might have to print this header in debug mode */
282 if (unlikely((global.mode & MODE_DEBUG) &&
283 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
284 int32_t pos;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200285
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200286 http_debug_stline("clireq", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +0200287
Christopher Fauleta3f15502019-05-13 15:27:23 +0200288 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200289 struct htx_blk *blk = htx_get_blk(htx, pos);
290 enum htx_blk_type type = htx_get_blk_type(blk);
291
292 if (type == HTX_BLK_EOH)
293 break;
294 if (type != HTX_BLK_HDR)
295 continue;
296
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200297 http_debug_hdr("clihdr", s,
298 htx_get_blk_name(htx, blk),
299 htx_get_blk_value(htx, blk));
Christopher Faulet9768c262018-10-22 09:34:31 +0200300 }
301 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200302
303 /*
Christopher Faulet03599112018-11-27 11:21:21 +0100304 * 1: identify the method and the version. Also set HTTP flags
Christopher Faulete0768eb2018-10-03 16:38:02 +0200305 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100306 txn->meth = sl->info.req.meth;
Christopher Faulet03599112018-11-27 11:21:21 +0100307 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +0200308 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +0100309 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +0100310 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +0100311 if (sl->flags & HTX_SL_F_BODYLESS)
312 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200313
314 /* we can make use of server redirect on GET and HEAD */
315 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
316 s->flags |= SF_REDIRECTABLE;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100317 else if (txn->meth == HTTP_METH_OTHER && isteqi(htx_sl_req_meth(sl), ist("PRI"))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200318 /* PRI is reserved for the HTTP/2 preface */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200319 goto return_bad_req;
320 }
321
322 /*
Christopher Faulet6072beb2020-02-18 15:34:58 +0100323 * 2: check if the URI matches the monitor_uri. We have to do this for
324 * every request which gets in, because the monitor-uri is defined by
325 * the frontend. If the monitor-uri starts with a '/', the matching is
326 * done against the request's path. Otherwise, the request's uri is
327 * used. It is a workaround to let HTTP/2 health-checks work as
328 * expected.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200329 */
330 if (unlikely((sess->fe->monitor_uri_len != 0) &&
Christopher Faulet6072beb2020-02-18 15:34:58 +0100331 ((*sess->fe->monitor_uri == '/' && isteq(http_get_path(htx_sl_req_uri(sl)),
332 ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))) ||
333 isteq(htx_sl_req_uri(sl), ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len))))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200334 /*
335 * We have found the monitor URI
336 */
337 struct acl_cond *cond;
338
339 s->flags |= SF_MONITOR;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100340 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200341
342 /* Check if we want to fail this monitor request or not */
343 list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) {
344 int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
345
346 ret = acl_pass(ret);
347 if (cond->pol == ACL_COND_UNLESS)
348 ret = !ret;
349
350 if (ret) {
351 /* we fail this request, let's return 503 service unavail */
352 txn->status = 503;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200353 if (!(s->flags & SF_ERR_MASK))
354 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
355 goto return_prx_cond;
356 }
357 }
358
Joseph Herlantc42c0e92018-11-25 10:43:27 -0800359 /* nothing to fail, let's reply normally */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200360 txn->status = 200;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200361 if (!(s->flags & SF_ERR_MASK))
362 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
363 goto return_prx_cond;
364 }
365
366 /*
367 * 3: Maybe we have to copy the original REQURI for the logs ?
368 * Note: we cannot log anymore if the request has been
369 * classified as invalid.
370 */
371 if (unlikely(s->logs.logwait & LW_REQ)) {
372 /* we have a complete HTTP request that we must log */
373 if ((txn->uri = pool_alloc(pool_head_requri)) != NULL) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200374 size_t len;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200375
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200376 len = http_fmt_req_line(sl, txn->uri, global.tune.requri_len - 1);
Christopher Faulet9768c262018-10-22 09:34:31 +0200377 txn->uri[len] = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200378
379 if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT)))
380 s->do_log(s);
381 } else {
382 ha_alert("HTTP logging : out of memory.\n");
383 }
384 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200385
Christopher Faulete0768eb2018-10-03 16:38:02 +0200386 /* if the frontend has "option http-use-proxy-header", we'll check if
387 * we have what looks like a proxied connection instead of a connection,
388 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
389 * Note that this is *not* RFC-compliant, however browsers and proxies
390 * happen to do that despite being non-standard :-(
391 * We consider that a request not beginning with either '/' or '*' is
392 * a proxied connection, which covers both "scheme://location" and
393 * CONNECT ip:port.
394 */
395 if ((sess->fe->options2 & PR_O2_USE_PXHDR) &&
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100396 *HTX_SL_REQ_UPTR(sl) != '/' && *HTX_SL_REQ_UPTR(sl) != '*')
Christopher Faulete0768eb2018-10-03 16:38:02 +0200397 txn->flags |= TX_USE_PX_CONN;
398
Christopher Faulete0768eb2018-10-03 16:38:02 +0200399 /* 5: we may need to capture headers */
400 if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200401 http_capture_headers(htx, s->req_cap, sess->fe->req_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200402
Christopher Faulete0768eb2018-10-03 16:38:02 +0200403 /* we may have to wait for the request's body */
Christopher Faulet9768c262018-10-22 09:34:31 +0200404 if (s->be->options & PR_O_WREQ_BODY)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200405 req->analysers |= AN_REQ_HTTP_BODY;
406
407 /*
408 * RFC7234#4:
409 * A cache MUST write through requests with methods
410 * that are unsafe (Section 4.2.1 of [RFC7231]) to
411 * the origin server; i.e., a cache is not allowed
412 * to generate a reply to such a request before
413 * having forwarded the request and having received
414 * a corresponding response.
415 *
416 * RFC7231#4.2.1:
417 * Of the request methods defined by this
418 * specification, the GET, HEAD, OPTIONS, and TRACE
419 * methods are defined to be safe.
420 */
421 if (likely(txn->meth == HTTP_METH_GET ||
422 txn->meth == HTTP_METH_HEAD ||
423 txn->meth == HTTP_METH_OPTIONS ||
424 txn->meth == HTTP_METH_TRACE))
425 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
426
427 /* end of job, return OK */
428 req->analysers &= ~an_bit;
429 req->analyse_exp = TICK_ETERNITY;
Christopher Faulet9768c262018-10-22 09:34:31 +0200430
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100431 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200432 return 1;
433
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200434 return_int_err:
435 txn->status = 500;
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200436 if (!(s->flags & SF_ERR_MASK))
437 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100438 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200439 if (sess->listener->counters)
Christopher Fauletb8a53712019-12-16 11:29:38 +0100440 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200441 goto return_prx_cond;
442
Christopher Faulete0768eb2018-10-03 16:38:02 +0200443 return_bad_req:
Christopher Faulet9768c262018-10-22 09:34:31 +0200444 txn->status = 400;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100445 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200446 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100447 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200448 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200449
450 return_prx_cond:
Christopher Fauletb9a92f32019-09-09 10:15:21 +0200451 http_reply_and_close(s, txn->status, http_error_message(s));
452
Christopher Faulete0768eb2018-10-03 16:38:02 +0200453 if (!(s->flags & SF_ERR_MASK))
454 s->flags |= SF_ERR_PRXCOND;
455 if (!(s->flags & SF_FINST_MASK))
456 s->flags |= SF_FINST_R;
457
458 req->analysers &= AN_REQ_FLT_END;
459 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100460 DBG_TRACE_DEVEL("leaving on error",
461 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200462 return 0;
463}
464
465
466/* This stream analyser runs all HTTP request processing which is common to
467 * frontends and backends, which means blocking ACLs, filters, connection-close,
468 * reqadd, stats and redirects. This is performed for the designated proxy.
469 * It returns 1 if the processing can continue on next analysers, or zero if it
470 * either needs more data or wants to immediately abort the request (eg: deny,
471 * error, ...).
472 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200473int http_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200474{
475 struct session *sess = s->sess;
476 struct http_txn *txn = s->txn;
477 struct http_msg *msg = &txn->req;
Christopher Fauletff2759f2018-10-24 11:13:16 +0200478 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200479 struct redirect_rule *rule;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200480 enum rule_result verdict;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200481 struct connection *conn = objt_conn(sess->origin);
482
483 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
484 /* we need more data */
485 goto return_prx_yield;
486 }
487
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100488 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200489
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100490 htx = htxbuf(&req->buf);
Christopher Fauletff2759f2018-10-24 11:13:16 +0200491
Christopher Faulet1907ccc2019-04-29 13:12:02 +0200492 /* just in case we have some per-backend tracking. Only called the first
493 * execution of the analyser. */
494 if (!s->current_rule || s->current_rule_list != &px->http_req_rules)
495 stream_inc_be_http_req_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200496
497 /* evaluate http-request rules */
498 if (!LIST_ISEMPTY(&px->http_req_rules)) {
Christopher Fauletb58f62b2020-01-13 16:40:13 +0100499 verdict = http_req_get_intercept_rule(px, &px->http_req_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200500
501 switch (verdict) {
502 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
503 goto return_prx_yield;
504
505 case HTTP_RULE_RES_CONT:
506 case HTTP_RULE_RES_STOP: /* nothing to do */
507 break;
508
509 case HTTP_RULE_RES_DENY: /* deny or tarpit */
510 if (txn->flags & TX_CLTARPIT)
511 goto tarpit;
512 goto deny;
513
514 case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */
515 goto return_prx_cond;
516
517 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
518 goto done;
519
520 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
521 goto return_bad_req;
Christopher Faulet3a26bee2019-12-16 12:47:40 +0100522
523 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
524 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200525 }
526 }
527
528 if (conn && (conn->flags & CO_FL_EARLY_DATA) &&
Olivier Houchard220a26c2020-01-23 14:57:36 +0100529 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_SSL_WAIT_HS))) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200530 struct http_hdr_ctx ctx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200531
Christopher Fauletff2759f2018-10-24 11:13:16 +0200532 ctx.blk = NULL;
533 if (!http_find_header(htx, ist("Early-Data"), &ctx, 0)) {
534 if (unlikely(!http_add_header(htx, ist("Early-Data"), ist("1"))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100535 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200536 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200537 }
538
539 /* OK at this stage, we know that the request was accepted according to
540 * the http-request rules, we can check for the stats. Note that the
541 * URI is detected *before* the req* rules in order not to be affected
542 * by a possible reqrep, while they are processed *after* so that a
543 * reqdeny can still block them. This clearly needs to change in 1.6!
544 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200545 if (!s->target && http_stats_check_uri(s, txn, px)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200546 s->target = &http_stats_applet.obj_type;
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100547 if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200548 s->logs.tv_request = now;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200549 if (!(s->flags & SF_ERR_MASK))
550 s->flags |= SF_ERR_RESOURCE;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100551 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200552 }
553
554 /* parse the whole stats request and extract the relevant information */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200555 http_handle_stats(s, req);
Christopher Fauletb58f62b2020-01-13 16:40:13 +0100556 verdict = http_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200557 /* not all actions implemented: deny, allow, auth */
558
559 if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */
560 goto deny;
561
562 if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */
563 goto return_prx_cond;
Christopher Faulet3a26bee2019-12-16 12:47:40 +0100564
565 if (verdict == HTTP_RULE_RES_BADREQ) /* failed with a bad request */
566 goto return_bad_req;
567
568 if (verdict == HTTP_RULE_RES_ERROR) /* failed with a bad request */
569 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200570 }
571
Christopher Faulet2571bc62019-03-01 11:44:26 +0100572 /* Proceed with the applets now. */
573 if (unlikely(objt_applet(s->target))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200574 if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
Olivier Houcharda798bf52019-03-08 18:52:00 +0100575 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200576
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200577 if (http_handle_expect_hdr(s, htx, msg) == -1)
Christopher Fauletb8a53712019-12-16 11:29:38 +0100578 goto return_int_err;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100579
Christopher Faulete0768eb2018-10-03 16:38:02 +0200580 if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is
581 s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy
582 if (!(s->flags & SF_FINST_MASK))
583 s->flags |= SF_FINST_R;
584
585 /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */
586 req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END);
587 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
588 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100589
590 req->flags |= CF_SEND_DONTWAIT;
591 s->flags |= SF_ASSIGNED;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200592 goto done;
593 }
594
595 /* check whether we have some ACLs set to redirect this request */
596 list_for_each_entry(rule, &px->redirect_rules, list) {
597 if (rule->cond) {
598 int ret;
599
600 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
601 ret = acl_pass(ret);
602 if (rule->cond->pol == ACL_COND_UNLESS)
603 ret = !ret;
604 if (!ret)
605 continue;
606 }
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200607 if (!http_apply_redirect_rule(rule, s, txn))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100608 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200609 goto done;
610 }
611
612 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
613 * If this happens, then the data will not come immediately, so we must
614 * send all what we have without waiting. Note that due to the small gain
615 * in waiting for the body of the request, it's easier to simply put the
616 * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
617 * itself once used.
618 */
619 req->flags |= CF_SEND_DONTWAIT;
620
621 done: /* done with this analyser, continue with next ones that the calling
622 * points will have set, if any.
623 */
624 req->analyse_exp = TICK_ETERNITY;
625 done_without_exp: /* done with this analyser, but dont reset the analyse_exp. */
626 req->analysers &= ~an_bit;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100627 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200628 return 1;
629
630 tarpit:
631 /* Allow cookie logging
632 */
633 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200634 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200635
636 /* When a connection is tarpitted, we use the tarpit timeout,
637 * which may be the same as the connect timeout if unspecified.
638 * If unset, then set it to zero because we really want it to
639 * eventually expire. We build the tarpit as an analyser.
640 */
Christopher Faulet202c6ce2019-01-07 14:57:35 +0100641 channel_htx_erase(&s->req, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200642
643 /* wipe the request out so that we can drop the connection early
644 * if the client closes first.
645 */
646 channel_dont_connect(req);
647
Christopher Faulete0768eb2018-10-03 16:38:02 +0200648 req->analysers &= AN_REQ_FLT_END; /* remove switching rules etc... */
649 req->analysers |= AN_REQ_HTTP_TARPIT;
650 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
651 if (!req->analyse_exp)
652 req->analyse_exp = tick_add(now_ms, 0);
653 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100654 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100655 if (s->flags & SF_BE_ASSIGNED)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100656 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200657 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100658 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200659 goto done_without_exp;
660
661 deny: /* this request was blocked (denied) */
662
663 /* Allow cookie logging
664 */
665 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200666 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200667
Christopher Faulete0768eb2018-10-03 16:38:02 +0200668 s->logs.tv_request = now;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200669 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100670 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100671 if (s->flags & SF_BE_ASSIGNED)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100672 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200673 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100674 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100675 goto return_prx_err;
676
677 return_int_err:
678 txn->status = 500;
679 if (!(s->flags & SF_ERR_MASK))
680 s->flags |= SF_ERR_INTERNAL;
681 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100682 if (s->flags & SF_BE_ASSIGNED)
683 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100684 if (sess->listener->counters)
685 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
686 goto return_prx_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200687
688 return_bad_req:
Christopher Faulete0768eb2018-10-03 16:38:02 +0200689 txn->status = 400;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100690 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200691 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100692 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100693 /* fall through */
694
695 return_prx_err:
696 http_reply_and_close(s, txn->status, http_error_message(s));
697 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200698
699 return_prx_cond:
700 if (!(s->flags & SF_ERR_MASK))
701 s->flags |= SF_ERR_PRXCOND;
702 if (!(s->flags & SF_FINST_MASK))
703 s->flags |= SF_FINST_R;
704
705 req->analysers &= AN_REQ_FLT_END;
706 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100707 DBG_TRACE_DEVEL("leaving on error",
708 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200709 return 0;
710
711 return_prx_yield:
712 channel_dont_connect(req);
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100713 DBG_TRACE_DEVEL("waiting for more data",
714 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200715 return 0;
716}
717
718/* This function performs all the processing enabled for the current request.
719 * It returns 1 if the processing can continue on next analysers, or zero if it
720 * needs more data, encounters an error, or wants to immediately abort the
721 * request. It relies on buffers flags, and updates s->req.analysers.
722 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200723int http_process_request(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200724{
725 struct session *sess = s->sess;
726 struct http_txn *txn = s->txn;
727 struct http_msg *msg = &txn->req;
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200728 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200729 struct connection *cli_conn = objt_conn(strm_sess(s)->origin);
730
731 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
732 /* we need more data */
733 channel_dont_connect(req);
734 return 0;
735 }
736
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100737 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200738
739 /*
740 * Right now, we know that we have processed the entire headers
741 * and that unwanted requests have been filtered out. We can do
742 * whatever we want with the remaining request. Also, now we
743 * may have separate values for ->fe, ->be.
744 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100745 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200746
747 /*
748 * If HTTP PROXY is set we simply get remote server address parsing
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200749 * incoming request.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200750 */
751 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100752 struct htx_sl *sl;
753 struct ist uri, path;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200754
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200755 if (!sockaddr_alloc(&s->target_addr)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200756 if (!(s->flags & SF_ERR_MASK))
757 s->flags |= SF_ERR_RESOURCE;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100758 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200759 }
Christopher Faulet297fbb42019-05-13 14:41:27 +0200760 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100761 uri = htx_sl_req_uri(sl);
762 path = http_get_path(uri);
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200763
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200764 if (url2sa(uri.ptr, uri.len - path.len, s->target_addr, NULL) == -1)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200765 goto return_bad_req;
766
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200767 s->target = &s->be->obj_type;
768 s->flags |= SF_ADDR_SET | SF_ASSIGNED;
769
Christopher Faulete0768eb2018-10-03 16:38:02 +0200770 /* if the path was found, we have to remove everything between
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200771 * uri.ptr and path.ptr (excluded). If it was not found, we need
772 * to replace from all the uri by a single "/".
773 *
774 * Instead of rewritting the whole start line, we just update
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100775 * the star-line URI. Some space will be lost but it should be
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200776 * insignificant.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200777 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100778 istcpy(&uri, (path.len ? path : ist("/")), uri.len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200779 }
780
781 /*
782 * 7: Now we can work with the cookies.
783 * Note that doing so might move headers in the request, but
784 * the fields will stay coherent and the URI will not move.
785 * This should only be performed in the backend.
786 */
787 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200788 http_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200789
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100790 /* 8: Generate unique ID if a "unique-id-format" is defined.
791 *
792 * A unique ID is generated even when it is not sent to ensure that the ID can make use of
793 * fetches only available in the HTTP request processing stage.
794 */
795 if (!LIST_ISEMPTY(&sess->fe->format_unique_id)) {
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100796 struct ist unique_id = stream_generate_unique_id(s, &sess->fe->format_unique_id);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200797
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100798 if (!isttest(unique_id)) {
Christopher Fauletb8a53712019-12-16 11:29:38 +0100799 if (!(s->flags & SF_ERR_MASK))
800 s->flags |= SF_ERR_RESOURCE;
801 goto return_int_err;
802 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200803
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100804 /* send unique ID if a "unique-id-header" is defined */
Tim Duesterhus0643b0e2020-03-05 17:56:35 +0100805 if (isttest(sess->fe->header_unique_id) &&
Tim Duesterhusa17e6622020-03-05 20:19:02 +0100806 unlikely(!http_add_header(htx, sess->fe->header_unique_id, s->unique_id)))
Tim Duesterhus2825b4b2020-02-28 15:13:34 +0100807 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200808 }
809
810 /*
811 * 9: add X-Forwarded-For if either the frontend or the backend
812 * asks for it.
813 */
814 if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200815 struct http_hdr_ctx ctx = { .blk = NULL };
816 struct ist hdr = ist2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name,
817 s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len);
818
Christopher Faulete0768eb2018-10-03 16:38:02 +0200819 if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200820 http_find_header(htx, hdr, &ctx, 0)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200821 /* The header is set to be added only if none is present
822 * and we found it, so don't do anything.
823 */
824 }
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200825 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200826 /* Add an X-Forwarded-For header unless the source IP is
827 * in the 'except' network range.
828 */
829 if ((!sess->fe->except_mask.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200830 (((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr & sess->fe->except_mask.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200831 != sess->fe->except_net.s_addr) &&
832 (!s->be->except_mask.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200833 (((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr & s->be->except_mask.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200834 != s->be->except_net.s_addr)) {
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200835 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->src)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200836
837 /* Note: we rely on the backend to get the header name to be used for
838 * x-forwarded-for, because the header is really meant for the backends.
839 * However, if the backend did not specify any option, we have to rely
840 * on the frontend's header name.
841 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200842 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
843 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100844 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200845 }
846 }
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200847 else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET6) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200848 /* FIXME: for the sake of completeness, we should also support
849 * 'except' here, although it is mostly useless in this case.
850 */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200851 char pn[INET6_ADDRSTRLEN];
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200852
Christopher Faulete0768eb2018-10-03 16:38:02 +0200853 inet_ntop(AF_INET6,
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200854 (const void *)&((struct sockaddr_in6 *)(cli_conn->src))->sin6_addr,
Christopher Faulete0768eb2018-10-03 16:38:02 +0200855 pn, sizeof(pn));
856
857 /* Note: we rely on the backend to get the header name to be used for
858 * x-forwarded-for, because the header is really meant for the backends.
859 * However, if the backend did not specify any option, we have to rely
860 * on the frontend's header name.
861 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200862 chunk_printf(&trash, "%s", pn);
863 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100864 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200865 }
866 }
867
868 /*
869 * 10: add X-Original-To if either the frontend or the backend
870 * asks for it.
871 */
872 if ((sess->fe->options | s->be->options) & PR_O_ORGTO) {
873
874 /* FIXME: don't know if IPv6 can handle that case too. */
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200875 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 +0200876 /* Add an X-Original-To header unless the destination IP is
877 * in the 'except' network range.
878 */
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200879 if (cli_conn->dst->ss_family == AF_INET &&
Christopher Faulete0768eb2018-10-03 16:38:02 +0200880 ((!sess->fe->except_mask_to.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200881 (((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr & sess->fe->except_mask_to.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200882 != sess->fe->except_to.s_addr) &&
883 (!s->be->except_mask_to.s_addr ||
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200884 (((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200885 != s->be->except_to.s_addr))) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200886 struct ist hdr;
Willy Tarreaua48f4b32019-07-17 15:11:59 +0200887 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200888
889 /* Note: we rely on the backend to get the header name to be used for
890 * x-original-to, because the header is really meant for the backends.
891 * However, if the backend did not specify any option, we have to rely
892 * on the frontend's header name.
893 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200894 if (s->be->orgto_hdr_len)
895 hdr = ist2(s->be->orgto_hdr_name, s->be->orgto_hdr_len);
896 else
897 hdr = ist2(sess->fe->orgto_hdr_name, sess->fe->orgto_hdr_len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200898
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200899 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
900 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +0100901 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200902 }
903 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200904 }
905
Christopher Faulete0768eb2018-10-03 16:38:02 +0200906 /* If we have no server assigned yet and we're balancing on url_param
907 * with a POST request, we may be interested in checking the body for
908 * that parameter. This will be done in another analyser.
909 */
910 if (!(s->flags & (SF_ASSIGNED|SF_DIRECT)) &&
Willy Tarreau089eaa02019-01-14 15:17:46 +0100911 s->txn->meth == HTTP_METH_POST &&
912 (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200913 channel_dont_connect(req);
914 req->analysers |= AN_REQ_HTTP_BODY;
915 }
916
917 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
918 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau1a18b542018-12-11 16:37:42 +0100919
Christopher Faulete0768eb2018-10-03 16:38:02 +0200920 /* We expect some data from the client. Unless we know for sure
921 * we already have a full request, we have to re-enable quick-ack
922 * in case we previously disabled it, otherwise we might cause
923 * the client to delay further data.
924 */
925 if ((sess->listener->options & LI_O_NOQUICKACK) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200926 (htx_get_tail_type(htx) != HTX_BLK_EOM))
Willy Tarreau1a18b542018-12-11 16:37:42 +0100927 conn_set_quickack(cli_conn, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200928
929 /*************************************************************
930 * OK, that's finished for the headers. We have done what we *
931 * could. Let's switch to the DATA state. *
932 ************************************************************/
933 req->analyse_exp = TICK_ETERNITY;
934 req->analysers &= ~an_bit;
935
936 s->logs.tv_request = now;
937 /* OK let's go on with the BODY now */
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100938 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200939 return 1;
940
Christopher Fauletb8a53712019-12-16 11:29:38 +0100941 return_int_err:
942 txn->status = 500;
943 if (!(s->flags & SF_ERR_MASK))
944 s->flags |= SF_ERR_INTERNAL;
945 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +0100946 if (s->flags & SF_BE_ASSIGNED)
Christopher Fauletbe20cf32020-01-24 11:41:38 +0100947 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100948 if (sess->listener->counters)
949 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
950 goto return_prx_cond;
951
Christopher Faulete0768eb2018-10-03 16:38:02 +0200952 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200953 txn->status = 400;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100954 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200955 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100956 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +0100957 /* fall through */
958
959 return_prx_cond:
960 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200961
962 if (!(s->flags & SF_ERR_MASK))
963 s->flags |= SF_ERR_PRXCOND;
964 if (!(s->flags & SF_FINST_MASK))
965 s->flags |= SF_FINST_R;
Christopher Fauletb8a53712019-12-16 11:29:38 +0100966
967 req->analysers &= AN_REQ_FLT_END;
968 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100969 DBG_TRACE_DEVEL("leaving on error",
970 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200971 return 0;
972}
973
974/* This function is an analyser which processes the HTTP tarpit. It always
975 * returns zero, at the beginning because it prevents any other processing
976 * from occurring, and at the end because it terminates the request.
977 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +0200978int http_process_tarpit(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200979{
980 struct http_txn *txn = s->txn;
981
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100982 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, &txn->req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200983 /* This connection is being tarpitted. The CLIENT side has
984 * already set the connect expiration date to the right
985 * timeout. We just have to check that the client is still
986 * there and that the timeout has not expired.
987 */
988 channel_dont_connect(req);
989 if ((req->flags & (CF_SHUTR|CF_READ_ERROR)) == 0 &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100990 !tick_is_expired(req->analyse_exp, now_ms)) {
991 DBG_TRACE_DEVEL("waiting for tarpit timeout expiry",
992 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200993 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +0100994 }
995
Christopher Faulete0768eb2018-10-03 16:38:02 +0200996
997 /* We will set the queue timer to the time spent, just for
998 * logging purposes. We fake a 500 server error, so that the
999 * attacker will not suspect his connection has been tarpitted.
1000 * It will not cause trouble to the logs because we can exclude
1001 * the tarpitted connections by filtering on the 'PT' status flags.
1002 */
1003 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1004
Christopher Faulet9d9d6452020-02-21 10:20:46 +01001005 http_reply_and_close(s, txn->status, (!(req->flags & CF_READ_ERROR) ? http_error_message(s) : NULL));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001006
1007 req->analysers &= AN_REQ_FLT_END;
1008 req->analyse_exp = TICK_ETERNITY;
1009
1010 if (!(s->flags & SF_ERR_MASK))
1011 s->flags |= SF_ERR_PRXCOND;
1012 if (!(s->flags & SF_FINST_MASK))
1013 s->flags |= SF_FINST_T;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001014
1015 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001016 return 0;
1017}
1018
1019/* This function is an analyser which waits for the HTTP request body. It waits
1020 * for either the buffer to be full, or the full advertised contents to have
1021 * reached the buffer. It must only be called after the standard HTTP request
1022 * processing has occurred, because it expects the request to be parsed and will
1023 * look for the Expect header. It may send a 100-Continue interim response. It
1024 * takes in input any state starting from HTTP_MSG_BODY and leaves with one of
1025 * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it
1026 * needs to read more data, or 1 once it has completed its analysis.
1027 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001028int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001029{
1030 struct session *sess = s->sess;
1031 struct http_txn *txn = s->txn;
1032 struct http_msg *msg = &s->txn->req;
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001033 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001034
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001035 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001036
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001037 htx = htxbuf(&req->buf);
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001038
Willy Tarreau4236f032019-03-05 10:43:32 +01001039 if (htx->flags & HTX_FL_PARSING_ERROR)
1040 goto return_bad_req;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001041 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1042 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +01001043
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001044 if (msg->msg_state < HTTP_MSG_BODY)
1045 goto missing_data;
Christopher Faulet9768c262018-10-22 09:34:31 +02001046
Christopher Faulete0768eb2018-10-03 16:38:02 +02001047 /* We have to parse the HTTP request body to find any required data.
1048 * "balance url_param check_post" should have been the only way to get
1049 * into this. We were brought here after HTTP header analysis, so all
1050 * related structures are ready.
1051 */
1052
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001053 if (msg->msg_state < HTTP_MSG_DATA) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001054 if (http_handle_expect_hdr(s, htx, msg) == -1)
Christopher Fauletb8a53712019-12-16 11:29:38 +01001055 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001056 }
1057
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001058 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001059
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001060 /* Now we're in HTTP_MSG_DATA. We just need to know if all data have
1061 * been received or if the buffer is full.
Christopher Faulete0768eb2018-10-03 16:38:02 +02001062 */
Christopher Faulet54b5e212019-06-04 10:08:28 +02001063 if (htx_get_tail_type(htx) > HTX_BLK_DATA ||
Christopher Fauletdcd8c5e2019-01-21 11:24:38 +01001064 channel_htx_full(req, htx, global.tune.maxrewrite))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001065 goto http_end;
1066
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001067 missing_data:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001068 if ((req->flags & CF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
1069 txn->status = 408;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001070 if (!(s->flags & SF_ERR_MASK))
1071 s->flags |= SF_ERR_CLITO;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001072 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
1073 if (sess->listener->counters)
1074 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
1075 goto return_prx_cond;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001076 }
1077
1078 /* we get here if we need to wait for more data */
1079 if (!(req->flags & (CF_SHUTR | CF_READ_ERROR))) {
1080 /* Not enough data. We'll re-use the http-request
1081 * timeout here. Ideally, we should set the timeout
1082 * relative to the accept() date. We just set the
1083 * request timeout once at the beginning of the
1084 * request.
1085 */
1086 channel_dont_connect(req);
1087 if (!tick_isset(req->analyse_exp))
1088 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001089 DBG_TRACE_DEVEL("waiting for more data",
1090 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001091 return 0;
1092 }
1093
1094 http_end:
1095 /* The situation will not evolve, so let's give up on the analysis. */
1096 s->logs.tv_request = now; /* update the request timer to reflect full request */
1097 req->analysers &= ~an_bit;
1098 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001099 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001100 return 1;
1101
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001102 return_int_err:
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001103 txn->status = 500;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001104 if (!(s->flags & SF_ERR_MASK))
1105 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001106 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001107 if (s->flags & SF_BE_ASSIGNED)
Christopher Fauletbe20cf32020-01-24 11:41:38 +01001108 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001109 if (sess->listener->counters)
1110 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
1111 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001112
Christopher Faulete0768eb2018-10-03 16:38:02 +02001113 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001114 txn->status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001115 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
1116 if (sess->listener->counters)
1117 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
1118 /* fall through */
1119
1120 return_prx_cond:
1121 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001122
1123 if (!(s->flags & SF_ERR_MASK))
1124 s->flags |= SF_ERR_PRXCOND;
1125 if (!(s->flags & SF_FINST_MASK))
Christopher Fauletb8a53712019-12-16 11:29:38 +01001126 s->flags |= (msg->msg_state < HTTP_MSG_DATA ? SF_FINST_R : SF_FINST_D);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001127
Christopher Faulete0768eb2018-10-03 16:38:02 +02001128 req->analysers &= AN_REQ_FLT_END;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001129 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001130 DBG_TRACE_DEVEL("leaving on error",
1131 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001132 return 0;
1133}
1134
1135/* This function is an analyser which forwards request body (including chunk
1136 * sizes if any). It is called as soon as we must forward, even if we forward
1137 * zero byte. The only situation where it must not be called is when we're in
1138 * tunnel mode and we want to forward till the close. It's used both to forward
1139 * remaining data and to resync after end of body. It expects the msg_state to
1140 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
1141 * read more data, or 1 once we can go on with next request or end the stream.
1142 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
1143 * bytes of pending data + the headers if not already done.
1144 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001145int http_request_forward_body(struct stream *s, struct channel *req, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001146{
1147 struct session *sess = s->sess;
1148 struct http_txn *txn = s->txn;
Christopher Faulet9768c262018-10-22 09:34:31 +02001149 struct http_msg *msg = &txn->req;
1150 struct htx *htx;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001151 short status = 0;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001152 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001153
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001154 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001155
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001156 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001157
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001158 if (htx->flags & HTX_FL_PARSING_ERROR)
1159 goto return_bad_req;
1160 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1161 goto return_int_err;
1162
Christopher Faulete0768eb2018-10-03 16:38:02 +02001163 if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
1164 ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) {
1165 /* Output closed while we were sending data. We must abort and
1166 * wake the other side up.
1167 */
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001168
Olivier Houchard29cac3c2019-07-12 15:48:58 +02001169 /* Don't abort yet if we had L7 retries activated and it
1170 * was a write error, we may recover.
1171 */
1172 if (!(req->flags & (CF_READ_ERROR | CF_READ_TIMEOUT)) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001173 (s->si[1].flags & SI_FL_L7_RETRY)) {
1174 DBG_TRACE_DEVEL("leaving on L7 retry",
1175 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Olivier Houchard29cac3c2019-07-12 15:48:58 +02001176 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001177 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001178 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001179 http_end_request(s);
1180 http_end_response(s);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001181 DBG_TRACE_DEVEL("leaving on error",
1182 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001183 return 1;
1184 }
1185
1186 /* Note that we don't have to send 100-continue back because we don't
1187 * need the data to complete our job, and it's up to the server to
1188 * decide whether to return 100, 417 or anything else in return of
1189 * an "Expect: 100-continue" header.
1190 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001191 if (msg->msg_state == HTTP_MSG_BODY)
1192 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001193
Christopher Faulete0768eb2018-10-03 16:38:02 +02001194 /* in most states, we should abort in case of early close */
1195 channel_auto_close(req);
1196
1197 if (req->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01001198 if (req->to_forward == CHN_INFINITE_FORWARD) {
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001199 if (req->flags & CF_EOI)
1200 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01001201 }
1202 else {
1203 /* We can't process the buffer's contents yet */
1204 req->flags |= CF_WAKE_WRITE;
1205 goto missing_data_or_waiting;
1206 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001207 }
1208
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001209 if (msg->msg_state >= HTTP_MSG_ENDING)
1210 goto ending;
1211
1212 if (txn->meth == HTTP_METH_CONNECT) {
1213 msg->msg_state = HTTP_MSG_ENDING;
1214 goto ending;
1215 }
1216
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001217 /* Forward input data. We get it by removing all outgoing data not
1218 * forwarded yet from HTX data size. If there are some data filters, we
1219 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02001220 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001221 if (HAS_REQ_DATA_FILTERS(s)) {
1222 ret = flt_http_payload(s, msg, htx->data);
1223 if (ret < 0)
1224 goto return_bad_req;
Christopher Faulet421e7692019-06-13 11:16:45 +02001225 c_adv(req, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001226 }
1227 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02001228 c_adv(req, htx->data - co_data(req));
Christopher Faulet66af0b22019-03-22 14:54:52 +01001229 if (msg->flags & HTTP_MSGF_XFER_LEN)
1230 channel_htx_forward_forever(req, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001231 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001232
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001233 if (htx->data != co_data(req))
1234 goto missing_data_or_waiting;
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001235
Christopher Faulet9768c262018-10-22 09:34:31 +02001236 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001237 * in HTTP_MSG_ENDING state. Then if all data was marked to be
1238 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02001239 */
1240 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
1241 goto missing_data_or_waiting;
1242
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001243 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02001244
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001245 ending:
1246 /* other states, ENDING...TUNNEL */
1247 if (msg->msg_state >= HTTP_MSG_DONE)
1248 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001249
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001250 if (HAS_REQ_DATA_FILTERS(s)) {
1251 ret = flt_http_end(s, msg);
1252 if (ret <= 0) {
1253 if (!ret)
1254 goto missing_data_or_waiting;
1255 goto return_bad_req;
1256 }
1257 }
1258
Christopher Faulet1a3e0272019-11-15 16:31:46 +01001259 if (txn->meth == HTTP_METH_CONNECT)
1260 msg->msg_state = HTTP_MSG_TUNNEL;
1261 else {
1262 msg->msg_state = HTTP_MSG_DONE;
1263 req->to_forward = 0;
1264 }
1265
1266 done:
1267 /* we don't want to forward closes on DONE except in tunnel mode. */
1268 if (!(txn->flags & TX_CON_WANT_TUN))
1269 channel_dont_close(req);
1270
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001271 http_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001272 if (!(req->analysers & an_bit)) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001273 http_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001274 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
1275 if (req->flags & CF_SHUTW) {
1276 /* request errors are most likely due to the
1277 * server aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01001278 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001279 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001280 goto return_bad_req;
1281 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001282 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001283 return 1;
1284 }
1285
1286 /* If "option abortonclose" is set on the backend, we want to monitor
1287 * the client's connection and forward any shutdown notification to the
1288 * server, which will decide whether to close or to go on processing the
1289 * request. We only do that in tunnel mode, and not in other modes since
1290 * it can be abused to exhaust source ports. */
Christopher Faulet769d0e92019-03-22 14:23:18 +01001291 if (s->be->options & PR_O_ABRT_CLOSE) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001292 channel_auto_read(req);
Christopher Fauletc41547b2019-07-16 14:32:23 +02001293 if ((req->flags & (CF_SHUTR|CF_READ_NULL)) && !(txn->flags & TX_CON_WANT_TUN))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001294 s->si[1].flags |= SI_FL_NOLINGER;
1295 channel_auto_close(req);
1296 }
1297 else if (s->txn->meth == HTTP_METH_POST) {
1298 /* POST requests may require to read extra CRLF sent by broken
1299 * browsers and which could cause an RST to be sent upon close
1300 * on some systems (eg: Linux). */
1301 channel_auto_read(req);
1302 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001303 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
1304 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001305 return 0;
1306
1307 missing_data_or_waiting:
1308 /* stop waiting for data if the input is closed before the end */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001309 if (msg->msg_state < HTTP_MSG_ENDING && req->flags & CF_SHUTR)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001310 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001311
1312 waiting:
1313 /* waiting for the last bits to leave the buffer */
1314 if (req->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001315 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001316
1317 /* When TE: chunked is used, we need to get there again to parse remaining
1318 * chunks even if the client has closed, so we don't want to set CF_DONTCLOSE.
1319 * And when content-length is used, we never want to let the possible
1320 * shutdown be forwarded to the other side, as the state machine will
1321 * take care of it once the client responds. It's also important to
1322 * prevent TIME_WAITs from accumulating on the backend side, and for
1323 * HTTP/2 where the last frame comes with a shutdown.
1324 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001325 if (msg->flags & HTTP_MSGF_XFER_LEN)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001326 channel_dont_close(req);
1327
1328 /* We know that more data are expected, but we couldn't send more that
1329 * what we did. So we always set the CF_EXPECT_MORE flag so that the
1330 * system knows it must not set a PUSH on this first part. Interactive
1331 * modes are already handled by the stream sock layer. We must not do
1332 * this in content-length mode because it could present the MSG_MORE
1333 * flag with the last block of forwarded data, which would cause an
1334 * additional delay to be observed by the receiver.
1335 */
1336 if (msg->flags & HTTP_MSGF_TE_CHNK)
1337 req->flags |= CF_EXPECT_MORE;
1338
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001339 DBG_TRACE_DEVEL("waiting for more data to forward",
1340 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001341 return 0;
1342
Christopher Faulet93e02d82019-03-08 14:18:50 +01001343 return_cli_abort:
1344 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1345 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001346 if (sess->listener->counters)
1347 _HA_ATOMIC_ADD(&sess->listener->counters->cli_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001348 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01001349 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001350 if (!(s->flags & SF_ERR_MASK))
1351 s->flags |= SF_ERR_CLICL;
1352 status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001353 goto return_prx_cond;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001354
1355 return_srv_abort:
1356 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
1357 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001358 if (sess->listener->counters)
1359 _HA_ATOMIC_ADD(&sess->listener->counters->srv_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001360 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01001361 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.srv_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001362 if (!(s->flags & SF_ERR_MASK))
1363 s->flags |= SF_ERR_SRVCL;
1364 status = 502;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001365 goto return_prx_cond;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001366
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001367 return_int_err:
1368 if (!(s->flags & SF_ERR_MASK))
1369 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001370 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001371 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001372 if (sess->listener->counters)
1373 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001374 if (objt_server(s->target))
1375 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001376 status = 500;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001377 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001378
Christopher Faulet93e02d82019-03-08 14:18:50 +01001379 return_bad_req:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001380 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001381 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001382 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01001383 status = 400;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001384 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001385
Christopher Fauletb8a53712019-12-16 11:29:38 +01001386 return_prx_cond:
Christopher Faulet9768c262018-10-22 09:34:31 +02001387 if (txn->status > 0) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001388 /* Note: we don't send any error if some data were already sent */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001389 http_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001390 } else {
Christopher Faulet93e02d82019-03-08 14:18:50 +01001391 txn->status = status;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001392 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001393 }
1394 req->analysers &= AN_REQ_FLT_END;
1395 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 +01001396 if (!(s->flags & SF_ERR_MASK))
1397 s->flags |= SF_ERR_PRXCOND;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001398 if (!(s->flags & SF_FINST_MASK))
1399 s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001400 DBG_TRACE_DEVEL("leaving on error ",
1401 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001402 return 0;
1403}
1404
Olivier Houcharda254a372019-04-05 15:30:12 +02001405/* Reset the stream and the backend stream_interface to a situation suitable for attemption connection */
1406/* Returns 0 if we can attempt to retry, -1 otherwise */
1407static __inline int do_l7_retry(struct stream *s, struct stream_interface *si)
1408{
1409 struct channel *req, *res;
1410 int co_data;
1411
1412 si->conn_retries--;
1413 if (si->conn_retries < 0)
1414 return -1;
1415
Willy Tarreau223995e2019-05-04 10:38:31 +02001416 if (objt_server(s->target))
1417 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.retries, 1);
1418 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
1419
Olivier Houcharda254a372019-04-05 15:30:12 +02001420 req = &s->req;
1421 res = &s->res;
1422 /* Remove any write error from the request, and read error from the response */
1423 req->flags &= ~(CF_WRITE_ERROR | CF_WRITE_TIMEOUT | CF_SHUTW | CF_SHUTW_NOW);
1424 res->flags &= ~(CF_READ_ERROR | CF_READ_TIMEOUT | CF_SHUTR | CF_EOI | CF_READ_NULL | CF_SHUTR_NOW);
1425 res->analysers = 0;
1426 si->flags &= ~(SI_FL_ERR | SI_FL_EXP | SI_FL_RXBLK_SHUT);
Olivier Houchard4bd58672019-07-12 16:16:59 +02001427 stream_choose_redispatch(s);
Olivier Houcharda254a372019-04-05 15:30:12 +02001428 si->exp = TICK_ETERNITY;
1429 res->rex = TICK_ETERNITY;
1430 res->to_forward = 0;
1431 res->analyse_exp = TICK_ETERNITY;
1432 res->total = 0;
Olivier Houchard4bd58672019-07-12 16:16:59 +02001433 s->flags &= ~(SF_ERR_SRVTO | SF_ERR_SRVCL);
Olivier Houcharda254a372019-04-05 15:30:12 +02001434 si_release_endpoint(&s->si[1]);
1435 b_free(&req->buf);
1436 /* Swap the L7 buffer with the channel buffer */
1437 /* We know we stored the co_data as b_data, so get it there */
1438 co_data = b_data(&si->l7_buffer);
1439 b_set_data(&si->l7_buffer, b_size(&si->l7_buffer));
1440 b_xfer(&req->buf, &si->l7_buffer, b_data(&si->l7_buffer));
1441
1442 co_set_data(req, co_data);
1443 b_reset(&res->buf);
1444 co_set_data(res, 0);
1445 return 0;
1446}
1447
Christopher Faulete0768eb2018-10-03 16:38:02 +02001448/* This stream analyser waits for a complete HTTP response. It returns 1 if the
1449 * processing can continue on next analysers, or zero if it either needs more
1450 * data or wants to immediately abort the response (eg: timeout, error, ...). It
1451 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
1452 * when it has nothing left to do, and may remove any analyser when it wants to
1453 * abort.
1454 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001455int http_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001456{
Christopher Faulet9768c262018-10-22 09:34:31 +02001457 /*
1458 * We will analyze a complete HTTP response to check the its syntax.
1459 *
1460 * Once the start line and all headers are received, we may perform a
1461 * capture of the error (if any), and we will set a few fields. We also
1462 * logging and finally headers capture.
1463 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001464 struct session *sess = s->sess;
1465 struct http_txn *txn = s->txn;
1466 struct http_msg *msg = &txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02001467 struct htx *htx;
Olivier Houcharda254a372019-04-05 15:30:12 +02001468 struct stream_interface *si_b = &s->si[1];
Christopher Faulet61608322018-11-23 16:23:45 +01001469 struct connection *srv_conn;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001470 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001471 int n;
1472
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001473 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001474
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001475 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001476
Willy Tarreau4236f032019-03-05 10:43:32 +01001477 /* Parsing errors are caught here */
1478 if (htx->flags & HTX_FL_PARSING_ERROR)
1479 goto return_bad_res;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001480 if (htx->flags & HTX_FL_PROCESSING_ERROR)
1481 goto return_int_err;
Willy Tarreau4236f032019-03-05 10:43:32 +01001482
Christopher Faulete0768eb2018-10-03 16:38:02 +02001483 /*
1484 * Now we quickly check if we have found a full valid response.
1485 * If not so, we check the FD and buffer states before leaving.
1486 * A full response is indicated by the fact that we have seen
1487 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
1488 * responses are checked first.
1489 *
1490 * Depending on whether the client is still there or not, we
1491 * may send an error response back or not. Note that normally
1492 * we should only check for HTTP status there, and check I/O
1493 * errors somewhere else.
1494 */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001495 next_one:
Christopher Faulet29f17582019-05-23 11:03:26 +02001496 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001497 /* 1: have we encountered a read error ? */
1498 if (rep->flags & CF_READ_ERROR) {
Olivier Houchard865d8392019-05-03 22:46:27 +02001499 struct connection *conn = NULL;
1500
Olivier Houchard865d8392019-05-03 22:46:27 +02001501 if (objt_cs(s->si[1].end))
1502 conn = objt_cs(s->si[1].end)->conn;
1503
1504 if (si_b->flags & SI_FL_L7_RETRY &&
1505 (!conn || conn->err_code != CO_ER_SSL_EARLY_FAILED)) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001506 /* If we arrive here, then CF_READ_ERROR was
1507 * set by si_cs_recv() because we matched a
1508 * status, overwise it would have removed
1509 * the SI_FL_L7_RETRY flag, so it's ok not
1510 * to check s->be->retry_type.
1511 */
1512 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1513 return 0;
1514 }
1515
Olivier Houchard6db16992019-05-17 15:40:49 +02001516 if (txn->flags & TX_NOT_FIRST)
1517 goto abort_keep_alive;
1518
Olivier Houcharda798bf52019-03-08 18:52:00 +01001519 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001520 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001521 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001522 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001523 }
1524
Christopher Faulete0768eb2018-10-03 16:38:02 +02001525 rep->analysers &= AN_RES_FLT_END;
1526 txn->status = 502;
1527
1528 /* Check to see if the server refused the early data.
1529 * If so, just send a 425
1530 */
Olivier Houchard865d8392019-05-03 22:46:27 +02001531 if (conn->err_code == CO_ER_SSL_EARLY_FAILED) {
1532 if ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001533 (si_b->flags & SI_FL_L7_RETRY) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001534 do_l7_retry(s, si_b) == 0) {
1535 DBG_TRACE_DEVEL("leaving on L7 retry",
1536 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houchard865d8392019-05-03 22:46:27 +02001537 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001538 }
Olivier Houchard865d8392019-05-03 22:46:27 +02001539 txn->status = 425;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001540 }
1541
1542 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001543 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001544
1545 if (!(s->flags & SF_ERR_MASK))
1546 s->flags |= SF_ERR_SRVCL;
1547 if (!(s->flags & SF_FINST_MASK))
1548 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001549 DBG_TRACE_DEVEL("leaving on error",
1550 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001551 return 0;
1552 }
1553
Christopher Faulet9768c262018-10-22 09:34:31 +02001554 /* 2: read timeout : return a 504 to the client. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001555 else if (rep->flags & CF_READ_TIMEOUT) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001556 if ((si_b->flags & SI_FL_L7_RETRY) &&
1557 (s->be->retry_type & PR_RE_TIMEOUT)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001558 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1559 DBG_TRACE_DEVEL("leaving on L7 retry",
1560 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001561 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001562 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001563 }
Olivier Houcharda798bf52019-03-08 18:52:00 +01001564 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001565 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001566 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001567 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001568 }
1569
Christopher Faulete0768eb2018-10-03 16:38:02 +02001570 rep->analysers &= AN_RES_FLT_END;
1571 txn->status = 504;
1572 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001573 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001574
1575 if (!(s->flags & SF_ERR_MASK))
1576 s->flags |= SF_ERR_SRVTO;
1577 if (!(s->flags & SF_FINST_MASK))
1578 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001579 DBG_TRACE_DEVEL("leaving on error",
1580 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001581 return 0;
1582 }
1583
Christopher Faulet9768c262018-10-22 09:34:31 +02001584 /* 3: client abort with an abortonclose */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001585 else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001586 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1587 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001588 if (sess->listener->counters)
1589 _HA_ATOMIC_ADD(&sess->listener->counters->cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001590 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001591 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001592
1593 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001594 txn->status = 400;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001595 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001596
1597 if (!(s->flags & SF_ERR_MASK))
1598 s->flags |= SF_ERR_CLICL;
1599 if (!(s->flags & SF_FINST_MASK))
1600 s->flags |= SF_FINST_H;
1601
1602 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001603 DBG_TRACE_DEVEL("leaving on error",
1604 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001605 return 0;
1606 }
1607
Christopher Faulet9768c262018-10-22 09:34:31 +02001608 /* 4: close from server, capture the response if the server has started to respond */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001609 else if (rep->flags & CF_SHUTR) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001610 if ((si_b->flags & SI_FL_L7_RETRY) &&
1611 (s->be->retry_type & PR_RE_DISCONNECTED)) {
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001612 if (co_data(rep) || do_l7_retry(s, si_b) == 0) {
1613 DBG_TRACE_DEVEL("leaving on L7 retry",
1614 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharda254a372019-04-05 15:30:12 +02001615 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001616 }
Olivier Houcharda254a372019-04-05 15:30:12 +02001617 }
1618
Olivier Houchard6db16992019-05-17 15:40:49 +02001619 if (txn->flags & TX_NOT_FIRST)
1620 goto abort_keep_alive;
1621
Olivier Houcharda798bf52019-03-08 18:52:00 +01001622 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001623 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001624 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001625 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001626 }
1627
Christopher Faulete0768eb2018-10-03 16:38:02 +02001628 rep->analysers &= AN_RES_FLT_END;
1629 txn->status = 502;
1630 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001631 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001632
1633 if (!(s->flags & SF_ERR_MASK))
1634 s->flags |= SF_ERR_SRVCL;
1635 if (!(s->flags & SF_FINST_MASK))
1636 s->flags |= SF_FINST_H;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001637 DBG_TRACE_DEVEL("leaving on error",
1638 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001639 return 0;
1640 }
1641
Christopher Faulet9768c262018-10-22 09:34:31 +02001642 /* 5: write error to client (we don't send any message then) */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001643 else if (rep->flags & CF_WRITE_ERROR) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001644 if (txn->flags & TX_NOT_FIRST)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001645 goto abort_keep_alive;
1646
Olivier Houcharda798bf52019-03-08 18:52:00 +01001647 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001648 if (objt_server(s->target))
1649 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001650 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001651
1652 if (!(s->flags & SF_ERR_MASK))
1653 s->flags |= SF_ERR_CLICL;
1654 if (!(s->flags & SF_FINST_MASK))
1655 s->flags |= SF_FINST_H;
1656
1657 /* process_stream() will take care of the error */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001658 DBG_TRACE_DEVEL("leaving on error",
1659 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001660 return 0;
1661 }
1662
1663 channel_dont_close(rep);
1664 rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001665 DBG_TRACE_DEVEL("waiting for more data",
1666 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001667 return 0;
1668 }
1669
1670 /* More interesting part now : we know that we have a complete
1671 * response which at least looks like HTTP. We have an indicator
1672 * of each header's length, so we can parse them quickly.
1673 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001674 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulet29f17582019-05-23 11:03:26 +02001675 BUG_ON(htx_get_first_type(htx) != HTX_BLK_RES_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +02001676 sl = http_get_stline(htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001677
Christopher Faulet9768c262018-10-22 09:34:31 +02001678 /* 0: we might have to print this header in debug mode */
1679 if (unlikely((global.mode & MODE_DEBUG) &&
1680 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
1681 int32_t pos;
1682
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001683 http_debug_stline("srvrep", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +02001684
Christopher Fauleta3f15502019-05-13 15:27:23 +02001685 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001686 struct htx_blk *blk = htx_get_blk(htx, pos);
1687 enum htx_blk_type type = htx_get_blk_type(blk);
1688
1689 if (type == HTX_BLK_EOH)
1690 break;
1691 if (type != HTX_BLK_HDR)
1692 continue;
1693
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001694 http_debug_hdr("srvhdr", s,
1695 htx_get_blk_name(htx, blk),
1696 htx_get_blk_value(htx, blk));
Christopher Faulet9768c262018-10-22 09:34:31 +02001697 }
1698 }
1699
Christopher Faulet03599112018-11-27 11:21:21 +01001700 /* 1: get the status code and the version. Also set HTTP flags */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001701 txn->status = sl->info.res.status;
Christopher Faulet03599112018-11-27 11:21:21 +01001702 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +02001703 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +01001704 if (sl->flags & HTX_SL_F_XFER_LEN) {
1705 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +01001706 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +01001707 if (sl->flags & HTX_SL_F_BODYLESS)
1708 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulet03599112018-11-27 11:21:21 +01001709 }
Christopher Faulet9768c262018-10-22 09:34:31 +02001710
1711 n = txn->status / 100;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001712 if (n < 1 || n > 5)
1713 n = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001714
Christopher Faulete0768eb2018-10-03 16:38:02 +02001715 /* when the client triggers a 4xx from the server, it's most often due
1716 * to a missing object or permission. These events should be tracked
1717 * because if they happen often, it may indicate a brute force or a
1718 * vulnerability scan.
1719 */
1720 if (n == 4)
1721 stream_inc_http_err_ctr(s);
1722
1723 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001724 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.p.http.rsp[n], 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001725
Christopher Faulete0768eb2018-10-03 16:38:02 +02001726 /* Adjust server's health based on status code. Note: status codes 501
1727 * and 505 are triggered on demand by client request, so we must not
1728 * count them as server failures.
1729 */
1730 if (objt_server(s->target)) {
1731 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001732 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001733 else
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001734 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001735 }
1736
1737 /*
1738 * We may be facing a 100-continue response, or any other informational
1739 * 1xx response which is non-final, in which case this is not the right
1740 * response, and we're waiting for the next one. Let's allow this response
1741 * to go to the client and wait for the next one. There's an exception for
1742 * 101 which is used later in the code to switch protocols.
1743 */
1744 if (txn->status < 200 &&
1745 (txn->status == 100 || txn->status >= 102)) {
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001746 FLT_STRM_CB(s, flt_http_reset(s, msg));
Christopher Faulet421e7692019-06-13 11:16:45 +02001747 htx->first = channel_htx_fwd_headers(rep, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001748 msg->msg_state = HTTP_MSG_RPBEFORE;
Christopher Faulet3499f622019-09-03 15:23:54 +02001749 msg->flags = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001750 txn->status = 0;
1751 s->logs.t_data = -1; /* was not a response yet */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001752 goto next_one;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001753 }
1754
1755 /*
1756 * 2: check for cacheability.
1757 */
1758
1759 switch (txn->status) {
1760 case 200:
1761 case 203:
1762 case 204:
1763 case 206:
1764 case 300:
1765 case 301:
1766 case 404:
1767 case 405:
1768 case 410:
1769 case 414:
1770 case 501:
1771 break;
1772 default:
1773 /* RFC7231#6.1:
1774 * Responses with status codes that are defined as
1775 * cacheable by default (e.g., 200, 203, 204, 206,
1776 * 300, 301, 404, 405, 410, 414, and 501 in this
1777 * specification) can be reused by a cache with
1778 * heuristic expiration unless otherwise indicated
1779 * by the method definition or explicit cache
1780 * controls [RFC7234]; all other status codes are
1781 * not cacheable by default.
1782 */
1783 txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
1784 break;
1785 }
1786
1787 /*
1788 * 3: we may need to capture headers
1789 */
1790 s->logs.logwait &= ~LW_RESP;
1791 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001792 http_capture_headers(htx, s->res_cap, sess->fe->rsp_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001793
Christopher Faulet9768c262018-10-22 09:34:31 +02001794 /* Skip parsing if no content length is possible. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001795 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
1796 txn->status == 101)) {
1797 /* Either we've established an explicit tunnel, or we're
1798 * switching the protocol. In both cases, we're very unlikely
1799 * to understand the next protocols. We have to switch to tunnel
1800 * mode, so that we transfer the request and responses then let
1801 * this protocol pass unmodified. When we later implement specific
1802 * parsers for such protocols, we'll want to check the Upgrade
1803 * header which contains information about that protocol for
1804 * responses with status 101 (eg: see RFC2817 about TLS).
1805 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02001806 txn->flags |= TX_CON_WANT_TUN;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001807 }
1808
Christopher Faulet61608322018-11-23 16:23:45 +01001809 /* check for NTML authentication headers in 401 (WWW-Authenticate) and
1810 * 407 (Proxy-Authenticate) responses and set the connection to private
1811 */
1812 srv_conn = cs_conn(objt_cs(s->si[1].end));
1813 if (srv_conn) {
1814 struct ist hdr;
1815 struct http_hdr_ctx ctx;
1816
1817 if (txn->status == 401)
1818 hdr = ist("WWW-Authenticate");
1819 else if (txn->status == 407)
1820 hdr = ist("Proxy-Authenticate");
1821 else
1822 goto end;
1823
1824 ctx.blk = NULL;
1825 while (http_find_header(htx, hdr, &ctx, 0)) {
1826 if ((ctx.value.len >= 9 && word_match(ctx.value.ptr, ctx.value.len, "Negotiate", 9)) ||
Olivier Houchard250031e2019-05-29 15:01:50 +02001827 (ctx.value.len >= 4 && word_match(ctx.value.ptr, ctx.value.len, "NTLM", 4))) {
1828 sess->flags |= SESS_FL_PREFER_LAST;
Christopher Faulet61608322018-11-23 16:23:45 +01001829 srv_conn->flags |= CO_FL_PRIVATE;
Olivier Houchard250031e2019-05-29 15:01:50 +02001830 }
Christopher Faulet61608322018-11-23 16:23:45 +01001831 }
1832 }
1833
1834 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001835 /* we want to have the response time before we start processing it */
1836 s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
1837
1838 /* end of job, return OK */
1839 rep->analysers &= ~an_bit;
1840 rep->analyse_exp = TICK_ETERNITY;
1841 channel_auto_close(rep);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001842 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001843 return 1;
1844
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001845 return_int_err:
Christopher Fauletcff0f732019-12-16 16:13:44 +01001846 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001847 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01001848 if (sess->listener->counters)
1849 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01001850 if (objt_server(s->target))
1851 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001852 txn->status = 500;
1853 if (!(s->flags & SF_ERR_MASK))
1854 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01001855 goto return_prx_cond;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001856
1857 return_bad_res:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001858 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulet47365272018-10-31 17:40:50 +01001859 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001860 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001861 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
Christopher Faulet47365272018-10-31 17:40:50 +01001862 }
Olivier Houcharde3249a92019-05-03 23:01:47 +02001863 if ((s->be->retry_type & PR_RE_JUNK_REQUEST) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001864 (si_b->flags & SI_FL_L7_RETRY) &&
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001865 do_l7_retry(s, si_b) == 0) {
1866 DBG_TRACE_DEVEL("leaving on L7 retry",
1867 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Olivier Houcharde3249a92019-05-03 23:01:47 +02001868 return 0;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001869 }
Christopher Faulet47365272018-10-31 17:40:50 +01001870 txn->status = 502;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001871 /* fall through */
1872
Christopher Fauletb8a53712019-12-16 11:29:38 +01001873 return_prx_cond:
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001874 http_reply_and_close(s, txn->status, http_error_message(s));
Christopher Faulet47365272018-10-31 17:40:50 +01001875
1876 if (!(s->flags & SF_ERR_MASK))
1877 s->flags |= SF_ERR_PRXCOND;
1878 if (!(s->flags & SF_FINST_MASK))
1879 s->flags |= SF_FINST_H;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001880
1881 s->si[1].flags |= SI_FL_NOLINGER;
1882 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete58c0002020-03-02 16:21:01 +01001883 s->req.analysers &= AN_REQ_FLT_END;
Christopher Fauletb9a92f32019-09-09 10:15:21 +02001884 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001885 DBG_TRACE_DEVEL("leaving on error",
1886 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulet47365272018-10-31 17:40:50 +01001887 return 0;
1888
Christopher Faulete0768eb2018-10-03 16:38:02 +02001889 abort_keep_alive:
1890 /* A keep-alive request to the server failed on a network error.
1891 * The client is required to retry. We need to close without returning
1892 * any other information so that the client retries.
1893 */
1894 txn->status = 0;
1895 rep->analysers &= AN_RES_FLT_END;
1896 s->req.analysers &= AN_REQ_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001897 s->logs.logwait = 0;
1898 s->logs.level = 0;
1899 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001900 http_reply_and_close(s, txn->status, NULL);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001901 DBG_TRACE_DEVEL("leaving by closing K/A connection",
1902 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001903 return 0;
1904}
1905
1906/* This function performs all the processing enabled for the current response.
1907 * It normally returns 1 unless it wants to break. It relies on buffers flags,
1908 * and updates s->res.analysers. It might make sense to explode it into several
1909 * other functions. It works like process_request (see indications above).
1910 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001911int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001912{
1913 struct session *sess = s->sess;
1914 struct http_txn *txn = s->txn;
1915 struct http_msg *msg = &txn->rsp;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001916 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001917 struct proxy *cur_proxy;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001918 enum rule_result ret = HTTP_RULE_RES_CONT;
1919
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001920 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
1921 return 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001922
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001923 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001924
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001925 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001926
1927 /* The stats applet needs to adjust the Connection header but we don't
1928 * apply any filter there.
1929 */
1930 if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
1931 rep->analysers &= ~an_bit;
1932 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001933 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001934 }
1935
1936 /*
1937 * We will have to evaluate the filters.
1938 * As opposed to version 1.2, now they will be evaluated in the
1939 * filters order and not in the header order. This means that
1940 * each filter has to be validated among all headers.
1941 *
1942 * Filters are tried with ->be first, then with ->fe if it is
1943 * different from ->be.
1944 *
1945 * Maybe we are in resume condiion. In this case I choose the
1946 * "struct proxy" which contains the rule list matching the resume
1947 * pointer. If none of theses "struct proxy" match, I initialise
1948 * the process with the first one.
1949 *
1950 * In fact, I check only correspondance betwwen the current list
1951 * pointer and the ->fe rule list. If it doesn't match, I initialize
1952 * the loop with the ->be.
1953 */
1954 if (s->current_rule_list == &sess->fe->http_res_rules)
1955 cur_proxy = sess->fe;
1956 else
1957 cur_proxy = s->be;
1958 while (1) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001959 /* evaluate http-response rules */
1960 if (ret == HTTP_RULE_RES_CONT) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02001961 ret = http_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001962
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001963 switch (ret) {
1964 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
1965 goto return_prx_yield;
1966
1967 case HTTP_RULE_RES_CONT:
1968 case HTTP_RULE_RES_STOP: /* nothing to do */
1969 break;
1970
1971 case HTTP_RULE_RES_DENY: /* deny or tarpit */
1972 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001973
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001974 case HTTP_RULE_RES_ABRT: /* abort request, response already sent */
1975 goto return_prx_cond;
1976
1977 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
Christopher Fauletb8a53712019-12-16 11:29:38 +01001978 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001979
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001980 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
1981 goto return_bad_res;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001982
Christopher Faulet3a26bee2019-12-16 12:47:40 +01001983 case HTTP_RULE_RES_ERROR: /* failed with a bad request */
1984 goto return_int_err;
1985 }
1986
1987 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001988
Christopher Faulete0768eb2018-10-03 16:38:02 +02001989 /* check whether we're already working on the frontend */
1990 if (cur_proxy == sess->fe)
1991 break;
1992 cur_proxy = sess->fe;
1993 }
1994
Christopher Faulete0768eb2018-10-03 16:38:02 +02001995 /* OK that's all we can do for 1xx responses */
1996 if (unlikely(txn->status < 200 && txn->status != 101))
Christopher Fauletf2824e62018-10-01 12:12:37 +02001997 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001998
1999 /*
2000 * Now check for a server cookie.
2001 */
2002 if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002003 http_manage_server_side_cookies(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002004
2005 /*
2006 * Check for cache-control or pragma headers if required.
2007 */
2008 if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002009 http_check_response_for_cacheability(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002010
2011 /*
2012 * Add server cookie in the response if needed
2013 */
2014 if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
2015 !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
2016 (!(s->flags & SF_DIRECT) ||
2017 ((s->be->cookie_maxidle || txn->cookie_last_date) &&
2018 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
2019 (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
2020 (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
2021 (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
2022 !(s->flags & SF_IGNORE_PRST)) {
2023 /* the server is known, it's not the one the client requested, or the
2024 * cookie's last seen date needs to be refreshed. We have to
2025 * insert a set-cookie here, except if we want to insert only on POST
2026 * requests and this one isn't. Note that servers which don't have cookies
2027 * (eg: some backup servers) will return a full cookie removal request.
2028 */
2029 if (!objt_server(s->target)->cookie) {
2030 chunk_printf(&trash,
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002031 "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
Christopher Faulete0768eb2018-10-03 16:38:02 +02002032 s->be->cookie_name);
2033 }
2034 else {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002035 chunk_printf(&trash, "%s=%s", s->be->cookie_name, objt_server(s->target)->cookie);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002036
2037 if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
2038 /* emit last_date, which is mandatory */
2039 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2040 s30tob64((date.tv_sec+3) >> 2,
2041 trash.area + trash.data);
2042 trash.data += 5;
2043
2044 if (s->be->cookie_maxlife) {
2045 /* emit first_date, which is either the original one or
2046 * the current date.
2047 */
2048 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2049 s30tob64(txn->cookie_first_date ?
2050 txn->cookie_first_date >> 2 :
2051 (date.tv_sec+3) >> 2,
2052 trash.area + trash.data);
2053 trash.data += 5;
2054 }
2055 }
2056 chunk_appendf(&trash, "; path=/");
2057 }
2058
2059 if (s->be->cookie_domain)
2060 chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
2061
2062 if (s->be->ck_opts & PR_CK_HTTPONLY)
2063 chunk_appendf(&trash, "; HttpOnly");
2064
2065 if (s->be->ck_opts & PR_CK_SECURE)
2066 chunk_appendf(&trash, "; Secure");
2067
Christopher Faulet2f533902020-01-21 11:06:48 +01002068 if (s->be->cookie_attrs)
2069 chunk_appendf(&trash, "; %s", s->be->cookie_attrs);
2070
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002071 if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data))))
Christopher Fauletb8a53712019-12-16 11:29:38 +01002072 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002073
2074 txn->flags &= ~TX_SCK_MASK;
2075 if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
2076 /* the server did not change, only the date was updated */
2077 txn->flags |= TX_SCK_UPDATED;
2078 else
2079 txn->flags |= TX_SCK_INSERTED;
2080
2081 /* Here, we will tell an eventual cache on the client side that we don't
2082 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
2083 * Some caches understand the correct form: 'no-cache="set-cookie"', but
2084 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
2085 */
2086 if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
2087
2088 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
2089
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002090 if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private"))))
Christopher Fauletb8a53712019-12-16 11:29:38 +01002091 goto return_int_err;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002092 }
2093 }
2094
2095 /*
2096 * Check if result will be cacheable with a cookie.
2097 * We'll block the response if security checks have caught
2098 * nasty things such as a cacheable cookie.
2099 */
2100 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
2101 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
2102 (s->be->options & PR_O_CHK_CACHE)) {
2103 /* we're in presence of a cacheable response containing
2104 * a set-cookie header. We'll block it as requested by
2105 * the 'checkcache' option, and send an alert.
2106 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002107 ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
2108 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
2109 send_log(s->be, LOG_ALERT,
2110 "Blocking cacheable cookie in response from instance %s, server %s.\n",
2111 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
Christopher Fauletb8a53712019-12-16 11:29:38 +01002112 goto deny;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002113 }
2114
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002115 end:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002116 /*
2117 * Evaluate after-response rules before forwarding the response. rules
2118 * from the backend are evaluated first, then one from the frontend if
2119 * it differs.
2120 */
2121 if (!http_eval_after_res_rules(s))
2122 goto return_int_err;
2123
Christopher Faulete0768eb2018-10-03 16:38:02 +02002124 /* Always enter in the body analyzer */
2125 rep->analysers &= ~AN_RES_FLT_XFER_DATA;
2126 rep->analysers |= AN_RES_HTTP_XFER_BODY;
2127
2128 /* if the user wants to log as soon as possible, without counting
2129 * bytes from the server, then this is the right moment. We have
2130 * to temporarily assign bytes_out to log what we currently have.
2131 */
2132 if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
2133 s->logs.t_close = s->logs.t_data; /* to get a valid end date */
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002134 s->logs.bytes_out = htx->data;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002135 s->do_log(s);
2136 s->logs.bytes_out = 0;
2137 }
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002138
Christopher Fauletb8a53712019-12-16 11:29:38 +01002139 done:
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01002140 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002141 rep->analysers &= ~an_bit;
2142 rep->analyse_exp = TICK_ETERNITY;
2143 return 1;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002144
Christopher Fauletb8a53712019-12-16 11:29:38 +01002145 deny:
Christopher Fauletb8a53712019-12-16 11:29:38 +01002146 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
Christopher Fauleta08546b2019-12-16 16:07:34 +01002147 _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002148 if (sess->listener->counters)
2149 _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
Christopher Fauleta08546b2019-12-16 16:07:34 +01002150 if (objt_server(s->target))
2151 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.denied_resp, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002152 goto return_prx_err;
2153
2154 return_int_err:
2155 txn->status = 500;
2156 if (!(s->flags & SF_ERR_MASK))
2157 s->flags |= SF_ERR_INTERNAL;
Christopher Fauletcff0f732019-12-16 16:13:44 +01002158 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002159 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
2160 if (objt_server(s->target))
2161 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002162 if (objt_server(s->target))
2163 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002164 goto return_prx_err;
2165
2166 return_bad_res:
2167 txn->status = 502;
Christopher Fauleta20a6532020-02-05 10:16:41 +01002168 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
2169 if (objt_server(s->target)) {
2170 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
2171 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2172 }
Christopher Fauletb8a53712019-12-16 11:29:38 +01002173 /* fall through */
2174
2175 return_prx_err:
2176 http_reply_and_close(s, txn->status, http_error_message(s));
2177 /* fall through */
2178
2179 return_prx_cond:
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002180 s->logs.t_data = -1; /* was not a valid response */
2181 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002182
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002183 if (!(s->flags & SF_ERR_MASK))
2184 s->flags |= SF_ERR_PRXCOND;
2185 if (!(s->flags & SF_FINST_MASK))
2186 s->flags |= SF_FINST_H;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002187
Christopher Faulete58c0002020-03-02 16:21:01 +01002188 rep->analysers &= AN_RES_FLT_END;
2189 s->req.analysers &= AN_REQ_FLT_END;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002190 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002191 DBG_TRACE_DEVEL("leaving on error",
2192 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002193 return 0;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002194
2195 return_prx_yield:
2196 channel_dont_close(rep);
2197 DBG_TRACE_DEVEL("waiting for more data",
2198 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
2199 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002200}
2201
2202/* This function is an analyser which forwards response body (including chunk
2203 * sizes if any). It is called as soon as we must forward, even if we forward
2204 * zero byte. The only situation where it must not be called is when we're in
2205 * tunnel mode and we want to forward till the close. It's used both to forward
2206 * remaining data and to resync after end of body. It expects the msg_state to
2207 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
2208 * read more data, or 1 once we can go on with next request or end the stream.
2209 *
2210 * It is capable of compressing response data both in content-length mode and
2211 * in chunked mode. The state machines follows different flows depending on
2212 * whether content-length and chunked modes are used, since there are no
2213 * trailers in content-length :
2214 *
2215 * chk-mode cl-mode
2216 * ,----- BODY -----.
2217 * / \
2218 * V size > 0 V chk-mode
2219 * .--> SIZE -------------> DATA -------------> CRLF
2220 * | | size == 0 | last byte |
2221 * | v final crlf v inspected |
2222 * | TRAILERS -----------> DONE |
2223 * | |
2224 * `----------------------------------------------'
2225 *
2226 * Compression only happens in the DATA state, and must be flushed in final
2227 * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
2228 * is performed at once on final states for all bytes parsed, or when leaving
2229 * on missing data.
2230 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002231int http_response_forward_body(struct stream *s, struct channel *res, int an_bit)
Christopher Faulete0768eb2018-10-03 16:38:02 +02002232{
2233 struct session *sess = s->sess;
2234 struct http_txn *txn = s->txn;
2235 struct http_msg *msg = &s->txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02002236 struct htx *htx;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002237 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002238
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002239 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn, msg);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002240
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002241 htx = htxbuf(&res->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002242
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002243 if (htx->flags & HTX_FL_PARSING_ERROR)
2244 goto return_bad_res;
2245 if (htx->flags & HTX_FL_PROCESSING_ERROR)
2246 goto return_int_err;
2247
Christopher Faulete0768eb2018-10-03 16:38:02 +02002248 if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
Christopher Fauletf2824e62018-10-01 12:12:37 +02002249 ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002250 /* Output closed while we were sending data. We must abort and
2251 * wake the other side up.
2252 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002253 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002254 http_end_response(s);
2255 http_end_request(s);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002256 DBG_TRACE_DEVEL("leaving on error",
2257 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002258 return 1;
2259 }
2260
Christopher Faulet9768c262018-10-22 09:34:31 +02002261 if (msg->msg_state == HTTP_MSG_BODY)
2262 msg->msg_state = HTTP_MSG_DATA;
2263
Christopher Faulete0768eb2018-10-03 16:38:02 +02002264 /* in most states, we should abort in case of early close */
2265 channel_auto_close(res);
2266
Christopher Faulete0768eb2018-10-03 16:38:02 +02002267 if (res->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01002268 if (res->to_forward == CHN_INFINITE_FORWARD) {
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002269 if (res->flags & CF_EOI)
2270 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01002271 }
2272 else {
2273 /* We can't process the buffer's contents yet */
2274 res->flags |= CF_WAKE_WRITE;
2275 goto missing_data_or_waiting;
2276 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002277 }
2278
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002279 if (msg->msg_state >= HTTP_MSG_ENDING)
2280 goto ending;
2281
2282 if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 ||
2283 (!(msg->flags & HTTP_MSGF_XFER_LEN) && !HAS_RSP_DATA_FILTERS(s))) {
2284 msg->msg_state = HTTP_MSG_ENDING;
2285 goto ending;
2286 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002287
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002288 /* Forward input data. We get it by removing all outgoing data not
2289 * forwarded yet from HTX data size. If there are some data filters, we
2290 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02002291 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002292 if (HAS_RSP_DATA_FILTERS(s)) {
2293 ret = flt_http_payload(s, msg, htx->data);
2294 if (ret < 0)
2295 goto return_bad_res;
Christopher Faulet421e7692019-06-13 11:16:45 +02002296 c_adv(res, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002297 }
2298 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02002299 c_adv(res, htx->data - co_data(res));
Christopher Faulet66af0b22019-03-22 14:54:52 +01002300 if (msg->flags & HTTP_MSGF_XFER_LEN)
2301 channel_htx_forward_forever(res, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002302 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002303
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002304 if (htx->data != co_data(res))
2305 goto missing_data_or_waiting;
2306
2307 if (!(msg->flags & HTTP_MSGF_XFER_LEN) && res->flags & CF_SHUTR) {
2308 msg->msg_state = HTTP_MSG_ENDING;
2309 goto ending;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002310 }
2311
Christopher Faulet9768c262018-10-22 09:34:31 +02002312 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002313 * in HTTP_MSG_ENDING state. Then if all data was marked to be
2314 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02002315 */
2316 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
2317 goto missing_data_or_waiting;
2318
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002319 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02002320
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002321 ending:
2322 /* other states, ENDING...TUNNEL */
2323 if (msg->msg_state >= HTTP_MSG_DONE)
2324 goto done;
Christopher Faulet9768c262018-10-22 09:34:31 +02002325
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002326 if (HAS_RSP_DATA_FILTERS(s)) {
2327 ret = flt_http_end(s, msg);
2328 if (ret <= 0) {
2329 if (!ret)
2330 goto missing_data_or_waiting;
2331 goto return_bad_res;
2332 }
2333 }
2334
Christopher Faulet1a3e0272019-11-15 16:31:46 +01002335 if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 ||
2336 !(msg->flags & HTTP_MSGF_XFER_LEN)) {
2337 msg->msg_state = HTTP_MSG_TUNNEL;
2338 goto ending;
2339 }
2340 else {
2341 msg->msg_state = HTTP_MSG_DONE;
2342 res->to_forward = 0;
2343 }
2344
2345 done:
2346
2347 channel_dont_close(res);
2348
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002349 http_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002350 if (!(res->analysers & an_bit)) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002351 http_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002352 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2353 if (res->flags & CF_SHUTW) {
2354 /* response errors are most likely due to the
2355 * client aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002356 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002357 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002358 goto return_bad_res;
2359 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002360 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002361 return 1;
2362 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002363 DBG_TRACE_DEVEL("waiting for the end of the HTTP txn",
2364 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002365 return 0;
2366
2367 missing_data_or_waiting:
2368 if (res->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01002369 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002370
2371 /* stop waiting for data if the input is closed before the end. If the
2372 * client side was already closed, it means that the client has aborted,
2373 * so we don't want to count this as a server abort. Otherwise it's a
2374 * server abort.
2375 */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002376 if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002377 if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002378 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002379 /* If we have some pending data, we continue the processing */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002380 if (htx_is_empty(htx))
2381 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002382 }
2383
Christopher Faulete0768eb2018-10-03 16:38:02 +02002384 /* When TE: chunked is used, we need to get there again to parse
2385 * remaining chunks even if the server has closed, so we don't want to
Christopher Faulet9768c262018-10-22 09:34:31 +02002386 * set CF_DONTCLOSE. Similarly when there is a content-leng or if there
2387 * are filters registered on the stream, we don't want to forward a
2388 * close
Christopher Faulete0768eb2018-10-03 16:38:02 +02002389 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002390 if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002391 channel_dont_close(res);
2392
2393 /* We know that more data are expected, but we couldn't send more that
2394 * what we did. So we always set the CF_EXPECT_MORE flag so that the
2395 * system knows it must not set a PUSH on this first part. Interactive
2396 * modes are already handled by the stream sock layer. We must not do
2397 * this in content-length mode because it could present the MSG_MORE
2398 * flag with the last block of forwarded data, which would cause an
2399 * additional delay to be observed by the receiver.
2400 */
2401 if ((msg->flags & HTTP_MSGF_TE_CHNK) || (msg->flags & HTTP_MSGF_COMPRESSING))
2402 res->flags |= CF_EXPECT_MORE;
2403
2404 /* the stream handler will take care of timeouts and errors */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002405 DBG_TRACE_DEVEL("waiting for more data to forward",
2406 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002407 return 0;
2408
Christopher Faulet93e02d82019-03-08 14:18:50 +01002409 return_srv_abort:
2410 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
2411 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002412 if (sess->listener->counters)
2413 _HA_ATOMIC_ADD(&sess->listener->counters->srv_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002414 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01002415 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.srv_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002416 if (!(s->flags & SF_ERR_MASK))
2417 s->flags |= SF_ERR_SRVCL;
2418 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002419
Christopher Faulet93e02d82019-03-08 14:18:50 +01002420 return_cli_abort:
2421 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
2422 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002423 if (sess->listener->counters)
2424 _HA_ATOMIC_ADD(&sess->listener->counters->cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002425 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01002426 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002427 if (!(s->flags & SF_ERR_MASK))
2428 s->flags |= SF_ERR_CLICL;
2429 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002430
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002431 return_int_err:
Christopher Fauletcff0f732019-12-16 16:13:44 +01002432 _HA_ATOMIC_ADD(&sess->fe->fe_counters.internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002433 _HA_ATOMIC_ADD(&s->be->be_counters.internal_errors, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01002434 if (sess->listener->counters)
2435 _HA_ATOMIC_ADD(&sess->listener->counters->internal_errors, 1);
Christopher Fauletb8a53712019-12-16 11:29:38 +01002436 if (objt_server(s->target))
2437 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.internal_errors, 1);
Christopher Fauletb9a92f32019-09-09 10:15:21 +02002438 if (!(s->flags & SF_ERR_MASK))
2439 s->flags |= SF_ERR_INTERNAL;
2440 goto return_error;
2441
Christopher Faulet93e02d82019-03-08 14:18:50 +01002442 return_bad_res:
2443 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
2444 if (objt_server(s->target)) {
Christopher Fauletcff0f732019-12-16 16:13:44 +01002445 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Christopher Faulet93e02d82019-03-08 14:18:50 +01002446 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2447 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002448 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002449 s->flags |= SF_ERR_SRVCL;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002450 /* fall through */
Christopher Faulete0768eb2018-10-03 16:38:02 +02002451
Christopher Faulet93e02d82019-03-08 14:18:50 +01002452 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002453 /* don't send any error message as we're in the body */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002454 http_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002455 res->analysers &= AN_RES_FLT_END;
2456 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 +02002457 if (!(s->flags & SF_FINST_MASK))
2458 s->flags |= SF_FINST_D;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002459 DBG_TRACE_DEVEL("leaving on error",
2460 STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_HTTP_ERR, s, txn);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002461 return 0;
2462}
2463
Christopher Fauletf2824e62018-10-01 12:12:37 +02002464/* Perform an HTTP redirect based on the information in <rule>. The function
Christopher Faulet99daf282018-11-28 22:58:13 +01002465 * returns zero on success, or zero in case of a, irrecoverable error such
Christopher Fauletf2824e62018-10-01 12:12:37 +02002466 * as too large a request to build a valid response.
2467 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002468int http_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
Christopher Fauletf2824e62018-10-01 12:12:37 +02002469{
Christopher Faulet99daf282018-11-28 22:58:13 +01002470 struct channel *req = &s->req;
2471 struct channel *res = &s->res;
2472 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01002473 struct htx_sl *sl;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002474 struct buffer *chunk;
Christopher Faulet99daf282018-11-28 22:58:13 +01002475 struct ist status, reason, location;
2476 unsigned int flags;
Christopher Faulet08e66462019-05-23 16:44:59 +02002477 int close = 0; /* Try to keep the connection alive byt default */
Christopher Fauletf2824e62018-10-01 12:12:37 +02002478
2479 chunk = alloc_trash_chunk();
Christopher Fauletb8a53712019-12-16 11:29:38 +01002480 if (!chunk) {
2481 if (!(s->flags & SF_ERR_MASK))
2482 s->flags |= SF_ERR_RESOURCE;
Christopher Faulet99daf282018-11-28 22:58:13 +01002483 goto fail;
Christopher Fauletb8a53712019-12-16 11:29:38 +01002484 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002485
Christopher Faulet99daf282018-11-28 22:58:13 +01002486 /*
2487 * Create the location
2488 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002489 htx = htxbuf(&req->buf);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002490 switch(rule->type) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002491 case REDIRECT_TYPE_SCHEME: {
2492 struct http_hdr_ctx ctx;
2493 struct ist path, host;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002494
Christopher Faulet99daf282018-11-28 22:58:13 +01002495 host = ist("");
2496 ctx.blk = NULL;
2497 if (http_find_header(htx, ist("Host"), &ctx, 0))
2498 host = ctx.value;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002499
Christopher Faulet297fbb42019-05-13 14:41:27 +02002500 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002501 path = http_get_path(htx_sl_req_uri(sl));
2502 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002503 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002504 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2505 int qs = 0;
2506 while (qs < path.len) {
2507 if (*(path.ptr + qs) == '?') {
2508 path.len = qs;
2509 break;
2510 }
2511 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002512 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002513 }
2514 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002515 else
2516 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002517
Christopher Faulet99daf282018-11-28 22:58:13 +01002518 if (rule->rdr_str) { /* this is an old "redirect" rule */
2519 /* add scheme */
2520 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2521 goto fail;
2522 }
2523 else {
2524 /* add scheme with executing log format */
2525 chunk->data += build_logline(s, chunk->area + chunk->data,
2526 chunk->size - chunk->data,
2527 &rule->rdr_fmt);
2528 }
2529 /* add "://" + host + path */
2530 if (!chunk_memcat(chunk, "://", 3) ||
2531 !chunk_memcat(chunk, host.ptr, host.len) ||
2532 !chunk_memcat(chunk, path.ptr, path.len))
2533 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002534
Christopher Faulet99daf282018-11-28 22:58:13 +01002535 /* append a slash at the end of the location if needed and missing */
2536 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2537 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2538 if (chunk->data + 1 >= chunk->size)
2539 goto fail;
2540 chunk->area[chunk->data++] = '/';
2541 }
2542 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002543 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002544
Christopher Faulet99daf282018-11-28 22:58:13 +01002545 case REDIRECT_TYPE_PREFIX: {
2546 struct ist path;
2547
Christopher Faulet297fbb42019-05-13 14:41:27 +02002548 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002549 path = http_get_path(htx_sl_req_uri(sl));
2550 /* build message using path */
Tim Duesterhused526372020-03-05 17:56:33 +01002551 if (isttest(path)) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002552 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2553 int qs = 0;
2554 while (qs < path.len) {
2555 if (*(path.ptr + qs) == '?') {
2556 path.len = qs;
2557 break;
2558 }
2559 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002560 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002561 }
2562 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002563 else
2564 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002565
Christopher Faulet99daf282018-11-28 22:58:13 +01002566 if (rule->rdr_str) { /* this is an old "redirect" rule */
2567 /* add prefix. Note that if prefix == "/", we don't want to
2568 * add anything, otherwise it makes it hard for the user to
2569 * configure a self-redirection.
2570 */
2571 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
2572 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2573 goto fail;
2574 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002575 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002576 else {
2577 /* add prefix with executing log format */
2578 chunk->data += build_logline(s, chunk->area + chunk->data,
2579 chunk->size - chunk->data,
2580 &rule->rdr_fmt);
2581 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002582
Christopher Faulet99daf282018-11-28 22:58:13 +01002583 /* add path */
2584 if (!chunk_memcat(chunk, path.ptr, path.len))
2585 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002586
Christopher Faulet99daf282018-11-28 22:58:13 +01002587 /* append a slash at the end of the location if needed and missing */
2588 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2589 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2590 if (chunk->data + 1 >= chunk->size)
2591 goto fail;
2592 chunk->area[chunk->data++] = '/';
2593 }
2594 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002595 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002596 case REDIRECT_TYPE_LOCATION:
2597 default:
2598 if (rule->rdr_str) { /* this is an old "redirect" rule */
2599 /* add location */
2600 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2601 goto fail;
2602 }
2603 else {
2604 /* add location with executing log format */
2605 chunk->data += build_logline(s, chunk->area + chunk->data,
2606 chunk->size - chunk->data,
2607 &rule->rdr_fmt);
2608 }
2609 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002610 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002611 location = ist2(chunk->area, chunk->data);
2612
2613 /*
2614 * Create the 30x response
2615 */
2616 switch (rule->code) {
2617 case 308:
2618 status = ist("308");
2619 reason = ist("Permanent Redirect");
2620 break;
2621 case 307:
2622 status = ist("307");
2623 reason = ist("Temporary Redirect");
2624 break;
2625 case 303:
2626 status = ist("303");
2627 reason = ist("See Other");
2628 break;
2629 case 301:
2630 status = ist("301");
2631 reason = ist("Moved Permanently");
2632 break;
2633 case 302:
2634 default:
2635 status = ist("302");
2636 reason = ist("Found");
2637 break;
2638 }
2639
Christopher Faulet08e66462019-05-23 16:44:59 +02002640 if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE)
2641 close = 1;
2642
Christopher Faulet99daf282018-11-28 22:58:13 +01002643 htx = htx_from_buf(&res->buf);
Kevin Zhu96b36392020-01-07 09:42:55 +01002644 /* Trim any possible response */
2645 channel_htx_truncate(&s->res, htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002646 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2647 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason);
2648 if (!sl)
2649 goto fail;
2650 sl->info.res.status = rule->code;
2651 s->txn->status = rule->code;
2652
Christopher Faulet08e66462019-05-23 16:44:59 +02002653 if (close && !htx_add_header(htx, ist("Connection"), ist("close")))
2654 goto fail;
2655
2656 if (!htx_add_header(htx, ist("Content-length"), ist("0")) ||
Christopher Faulet99daf282018-11-28 22:58:13 +01002657 !htx_add_header(htx, ist("Location"), location))
2658 goto fail;
2659
2660 if (rule->code == 302 || rule->code == 303 || rule->code == 307) {
2661 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")))
2662 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002663 }
2664
2665 if (rule->cookie_len) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002666 if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len)))
2667 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002668 }
2669
Christopher Faulet99daf282018-11-28 22:58:13 +01002670 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
2671 goto fail;
2672
Kevin Zhu96b36392020-01-07 09:42:55 +01002673 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01002674 if (!http_forward_proxy_resp(s, 1))
2675 goto fail;
Christopher Faulet99daf282018-11-28 22:58:13 +01002676
Christopher Faulet60b33a52020-01-28 09:18:10 +01002677 if (rule->flags & REDIRECT_FLAG_FROM_REQ) {
2678 /* let's log the request time */
2679 s->logs.tv_request = now;
2680 req->analysers &= AN_REQ_FLT_END;
Christopher Faulet99daf282018-11-28 22:58:13 +01002681
Christopher Faulet60b33a52020-01-28 09:18:10 +01002682 if (s->sess->fe == s->be) /* report it if the request was intercepted by the frontend */
2683 _HA_ATOMIC_ADD(&s->sess->fe->fe_counters.intercepted_req, 1);
2684 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002685
2686 if (!(s->flags & SF_ERR_MASK))
2687 s->flags |= SF_ERR_LOCAL;
2688 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet60b33a52020-01-28 09:18:10 +01002689 s->flags |= ((rule->flags & REDIRECT_FLAG_FROM_REQ) ? SF_FINST_R : SF_FINST_H);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002690
Christopher Faulet99daf282018-11-28 22:58:13 +01002691 free_trash_chunk(chunk);
2692 return 1;
2693
2694 fail:
2695 /* If an error occurred, remove the incomplete HTTP response from the
2696 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002697 channel_htx_truncate(res, htxbuf(&res->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02002698 free_trash_chunk(chunk);
Christopher Faulet99daf282018-11-28 22:58:13 +01002699 return 0;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002700}
2701
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002702/* Replace all headers matching the name <name>. The header value is replaced if
2703 * it matches the regex <re>. <str> is used for the replacement. If <full> is
2704 * set to 1, the full-line is matched and replaced. Otherwise, comma-separated
2705 * values are evaluated one by one. It returns 0 on success and -1 on error.
2706 */
2707int http_replace_hdrs(struct stream* s, struct htx *htx, struct ist name,
2708 const char *str, struct my_regex *re, int full)
Christopher Faulet72333522018-10-24 11:25:02 +02002709{
2710 struct http_hdr_ctx ctx;
2711 struct buffer *output = get_trash_chunk();
2712
Christopher Faulet72333522018-10-24 11:25:02 +02002713 ctx.blk = NULL;
Christopher Faulet92d34fe2019-12-17 09:20:34 +01002714 while (http_find_header(htx, name, &ctx, full)) {
Christopher Faulet72333522018-10-24 11:25:02 +02002715 if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0))
2716 continue;
2717
2718 output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch);
2719 if (output->data == -1)
2720 return -1;
2721 if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data)))
2722 return -1;
2723 }
2724 return 0;
2725}
2726
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002727/* This function executes one of the set-{method,path,query,uri} actions. It
2728 * takes the string from the variable 'replace' with length 'len', then modifies
2729 * the relevant part of the request line accordingly. Then it updates various
2730 * pointers to the next elements which were moved, and the total buffer length.
2731 * It finds the action to be performed in p[2], previously filled by function
2732 * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
2733 * error, though this can be revisited when this code is finally exploited.
2734 *
2735 * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
2736 * query string and 3 to replace uri.
2737 *
2738 * In query string case, the mark question '?' must be set at the start of the
2739 * string by the caller, event if the replacement query string is empty.
2740 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002741int http_req_replace_stline(int action, const char *replace, int len,
2742 struct proxy *px, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002743{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002744 struct htx *htx = htxbuf(&s->req.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002745
2746 switch (action) {
2747 case 0: // method
2748 if (!http_replace_req_meth(htx, ist2(replace, len)))
2749 return -1;
2750 break;
2751
2752 case 1: // path
2753 if (!http_replace_req_path(htx, ist2(replace, len)))
2754 return -1;
2755 break;
2756
2757 case 2: // query
2758 if (!http_replace_req_query(htx, ist2(replace, len)))
2759 return -1;
2760 break;
2761
2762 case 3: // uri
2763 if (!http_replace_req_uri(htx, ist2(replace, len)))
2764 return -1;
2765 break;
2766
2767 default:
2768 return -1;
2769 }
2770 return 0;
2771}
2772
2773/* This function replace the HTTP status code and the associated message. The
Christopher Faulete00d06c2019-12-16 17:18:42 +01002774 * variable <status> contains the new status code. This function never fails. It
2775 * returns 0 in case of success, -1 in case of internal error.
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002776 */
Christopher Faulet96bff762019-12-17 13:46:18 +01002777int http_res_set_status(unsigned int status, struct ist reason, struct stream *s)
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002778{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002779 struct htx *htx = htxbuf(&s->res.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002780 char *res;
2781
2782 chunk_reset(&trash);
2783 res = ultoa_o(status, trash.area, trash.size);
2784 trash.data = res - trash.area;
2785
2786 /* Do we have a custom reason format string? */
Tim Duesterhuse296d3e2020-03-05 17:56:31 +01002787 if (!isttest(reason)) {
Christopher Faulet96bff762019-12-17 13:46:18 +01002788 const char *str = http_get_reason(status);
2789 reason = ist2(str, strlen(str));
2790 }
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002791
Christopher Faulete00d06c2019-12-16 17:18:42 +01002792 if (!http_replace_res_status(htx, ist2(trash.area, trash.data)))
2793 return -1;
Christopher Faulet96bff762019-12-17 13:46:18 +01002794 if (!http_replace_res_reason(htx, reason))
Christopher Faulete00d06c2019-12-16 17:18:42 +01002795 return -1;
2796 return 0;
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002797}
2798
Christopher Faulet3e964192018-10-24 11:39:23 +02002799/* Executes the http-request rules <rules> for stream <s>, proxy <px> and
2800 * transaction <txn>. Returns the verdict of the first rule that prevents
2801 * further processing of the request (auth, deny, ...), and defaults to
2802 * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
2803 * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
2804 * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
2805 * and a deny/tarpit rule is matched, it will be filled with this rule's deny
2806 * status.
2807 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002808static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules,
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002809 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002810{
2811 struct session *sess = strm_sess(s);
2812 struct http_txn *txn = s->txn;
2813 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02002814 struct act_rule *rule;
2815 struct http_hdr_ctx ctx;
2816 const char *auth_realm;
Christopher Faulet3e964192018-10-24 11:39:23 +02002817 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002818 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002819
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002820 htx = htxbuf(&s->req.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02002821
2822 /* If "the current_rule_list" match the executed rule list, we are in
2823 * resume condition. If a resume is needed it is always in the action
2824 * and never in the ACL or converters. In this case, we initialise the
2825 * current rule, and go to the action execution point.
2826 */
2827 if (s->current_rule) {
2828 rule = s->current_rule;
2829 s->current_rule = NULL;
2830 if (s->current_rule_list == rules)
2831 goto resume_execution;
2832 }
2833 s->current_rule_list = rules;
2834
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002835 /* start the ruleset evaluation in strict mode */
2836 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002837
Christopher Faulet3e964192018-10-24 11:39:23 +02002838 list_for_each_entry(rule, rules, list) {
2839 /* check optional condition */
2840 if (rule->cond) {
2841 int ret;
2842
2843 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
2844 ret = acl_pass(ret);
2845
2846 if (rule->cond->pol == ACL_COND_UNLESS)
2847 ret = !ret;
2848
2849 if (!ret) /* condition not matched */
2850 continue;
2851 }
2852
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002853 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02002854 resume_execution:
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002855 /* Always call the action function if defined */
2856 if (rule->action_ptr) {
2857 if ((s->req.flags & CF_READ_ERROR) ||
2858 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
2859 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002860 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002861
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002862 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002863 case ACT_RET_CONT:
2864 break;
2865 case ACT_RET_STOP:
2866 rule_ret = HTTP_RULE_RES_STOP;
2867 goto end;
2868 case ACT_RET_YIELD:
2869 s->current_rule = rule;
2870 rule_ret = HTTP_RULE_RES_YIELD;
2871 goto end;
2872 case ACT_RET_ERR:
2873 rule_ret = HTTP_RULE_RES_ERROR;
2874 goto end;
2875 case ACT_RET_DONE:
2876 rule_ret = HTTP_RULE_RES_DONE;
2877 goto end;
2878 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002879 txn->flags |= TX_CLDENY;
2880 if (txn->status == -1)
2881 txn->status = 403;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002882 rule_ret = HTTP_RULE_RES_DENY;
2883 goto end;
2884 case ACT_RET_ABRT:
2885 rule_ret = HTTP_RULE_RES_ABRT;
2886 goto end;
2887 case ACT_RET_INV:
2888 rule_ret = HTTP_RULE_RES_BADREQ;
2889 goto end;
2890 }
2891 continue; /* eval the next rule */
2892 }
2893
2894 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02002895 switch (rule->action) {
2896 case ACT_ACTION_ALLOW:
2897 rule_ret = HTTP_RULE_RES_STOP;
2898 goto end;
2899
2900 case ACT_ACTION_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01002901 txn->flags |= TX_CLDENY;
Christopher Faulet554c0eb2020-01-14 12:00:28 +01002902 txn->status = rule->arg.http_deny.status;
2903 if (rule->arg.http_deny.errmsg)
2904 txn->errmsg = rule->arg.http_deny.errmsg;
Christopher Faulet3e964192018-10-24 11:39:23 +02002905 rule_ret = HTTP_RULE_RES_DENY;
2906 goto end;
2907
2908 case ACT_HTTP_REQ_TARPIT:
2909 txn->flags |= TX_CLTARPIT;
Christopher Faulet554c0eb2020-01-14 12:00:28 +01002910 txn->status = rule->arg.http_deny.status;
2911 if (rule->arg.http_deny.errmsg)
2912 txn->errmsg = rule->arg.http_deny.errmsg;
Christopher Faulet3e964192018-10-24 11:39:23 +02002913 rule_ret = HTTP_RULE_RES_DENY;
2914 goto end;
2915
2916 case ACT_HTTP_REQ_AUTH:
Christopher Faulet3e964192018-10-24 11:39:23 +02002917 /* Auth might be performed on regular http-req rules as well as on stats */
Christopher Faulet96bff762019-12-17 13:46:18 +01002918 auth_realm = rule->arg.http.str.ptr;
Christopher Faulet3e964192018-10-24 11:39:23 +02002919 if (!auth_realm) {
2920 if (px->uri_auth && rules == &px->uri_auth->http_req_rules)
2921 auth_realm = STATS_DEFAULT_REALM;
2922 else
2923 auth_realm = px->id;
2924 }
2925 /* send 401/407 depending on whether we use a proxy or not. We still
2926 * count one error, because normal browsing won't significantly
2927 * increase the counter but brute force attempts will.
2928 */
Christopher Faulet3e964192018-10-24 11:39:23 +02002929 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002930 if (http_reply_40x_unauthorized(s, auth_realm) == -1)
Christopher Faulet3a26bee2019-12-16 12:47:40 +01002931 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet12c51e22018-11-28 15:59:42 +01002932 stream_inc_http_err_ctr(s);
Christopher Faulet3e964192018-10-24 11:39:23 +02002933 goto end;
2934
2935 case ACT_HTTP_REDIR:
Christopher Faulet90d22a82020-03-06 11:18:39 +01002936 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002937 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01002938 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02002939 goto end;
2940
2941 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01002942 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002943 break;
2944
2945 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01002946 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002947 break;
2948
2949 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01002950 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02002951 break;
2952
2953 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01002954 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02002955 break;
2956
Christopher Faulet3e964192018-10-24 11:39:23 +02002957 case ACT_HTTP_DEL_HDR:
2958 /* remove all occurrences of the header */
2959 ctx.blk = NULL;
Christopher Faulet96bff762019-12-17 13:46:18 +01002960 while (http_find_header(htx, rule->arg.http.str, &ctx, 1))
Christopher Faulet3e964192018-10-24 11:39:23 +02002961 http_remove_header(htx, &ctx);
2962 break;
2963
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01002964 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02002965 default:
2966 break;
2967 }
2968 }
2969
2970 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002971 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01002972 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01002973 txn->req.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01002974
Christopher Faulet3e964192018-10-24 11:39:23 +02002975 /* we reached the end of the rules, nothing to report */
2976 return rule_ret;
2977}
2978
2979/* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
2980 * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
2981 * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
2982 * is returned, the process can continue the evaluation of next rule list. If
2983 * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
2984 * is returned, it means the operation could not be processed and a server error
2985 * must be returned. It may set the TX_SVDENY on txn->flags if it encounters a
2986 * deny rule. If *YIELD is returned, the caller must call again the function
2987 * with the same context.
2988 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02002989static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules,
2990 struct stream *s)
Christopher Faulet3e964192018-10-24 11:39:23 +02002991{
2992 struct session *sess = strm_sess(s);
2993 struct http_txn *txn = s->txn;
2994 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02002995 struct act_rule *rule;
2996 struct http_hdr_ctx ctx;
2997 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
Christopher Faulet105ba6c2019-12-18 14:41:51 +01002998 int act_opts = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002999
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003000 htx = htxbuf(&s->res.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02003001
3002 /* If "the current_rule_list" match the executed rule list, we are in
3003 * resume condition. If a resume is needed it is always in the action
3004 * and never in the ACL or converters. In this case, we initialise the
3005 * current rule, and go to the action execution point.
3006 */
3007 if (s->current_rule) {
3008 rule = s->current_rule;
3009 s->current_rule = NULL;
3010 if (s->current_rule_list == rules)
3011 goto resume_execution;
3012 }
3013 s->current_rule_list = rules;
3014
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003015 /* start the ruleset evaluation in strict mode */
3016 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01003017
Christopher Faulet3e964192018-10-24 11:39:23 +02003018 list_for_each_entry(rule, rules, list) {
3019 /* check optional condition */
3020 if (rule->cond) {
3021 int ret;
3022
3023 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
3024 ret = acl_pass(ret);
3025
3026 if (rule->cond->pol == ACL_COND_UNLESS)
3027 ret = !ret;
3028
3029 if (!ret) /* condition not matched */
3030 continue;
3031 }
3032
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003033 act_opts |= ACT_OPT_FIRST;
Christopher Faulet3e964192018-10-24 11:39:23 +02003034resume_execution:
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003035
3036 /* Always call the action function if defined */
3037 if (rule->action_ptr) {
3038 if ((s->req.flags & CF_READ_ERROR) ||
3039 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
3040 (px->options & PR_O_ABRT_CLOSE)))
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003041 act_opts |= ACT_OPT_FINAL;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003042
Christopher Faulet105ba6c2019-12-18 14:41:51 +01003043 switch (rule->action_ptr(rule, px, sess, s, act_opts)) {
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003044 case ACT_RET_CONT:
3045 break;
3046 case ACT_RET_STOP:
3047 rule_ret = HTTP_RULE_RES_STOP;
3048 goto end;
3049 case ACT_RET_YIELD:
3050 s->current_rule = rule;
3051 rule_ret = HTTP_RULE_RES_YIELD;
3052 goto end;
3053 case ACT_RET_ERR:
3054 rule_ret = HTTP_RULE_RES_ERROR;
3055 goto end;
3056 case ACT_RET_DONE:
3057 rule_ret = HTTP_RULE_RES_DONE;
3058 goto end;
3059 case ACT_RET_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01003060 txn->flags |= TX_CLDENY;
3061 if (txn->status == -1)
3062 txn->status = 502;
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003063 rule_ret = HTTP_RULE_RES_DENY;
3064 goto end;
3065 case ACT_RET_ABRT:
3066 rule_ret = HTTP_RULE_RES_ABRT;
3067 goto end;
3068 case ACT_RET_INV:
3069 rule_ret = HTTP_RULE_RES_BADREQ;
3070 goto end;
3071 }
3072 continue; /* eval the next rule */
3073 }
3074
3075 /* If not action function defined, check for known actions */
Christopher Faulet3e964192018-10-24 11:39:23 +02003076 switch (rule->action) {
3077 case ACT_ACTION_ALLOW:
3078 rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
3079 goto end;
3080
3081 case ACT_ACTION_DENY:
Christopher Fauletb58f62b2020-01-13 16:40:13 +01003082 txn->flags |= TX_CLDENY;
Christopher Faulet554c0eb2020-01-14 12:00:28 +01003083 txn->status = rule->arg.http_deny.status;
3084 if (rule->arg.http_deny.errmsg)
3085 txn->errmsg = rule->arg.http_deny.errmsg;
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003086 rule_ret = HTTP_RULE_RES_DENY;
Christopher Faulet3e964192018-10-24 11:39:23 +02003087 goto end;
3088
3089 case ACT_HTTP_SET_NICE:
Christopher Faulet96bff762019-12-17 13:46:18 +01003090 s->task->nice = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003091 break;
3092
3093 case ACT_HTTP_SET_TOS:
Christopher Faulet96bff762019-12-17 13:46:18 +01003094 conn_set_tos(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003095 break;
3096
3097 case ACT_HTTP_SET_MARK:
Christopher Faulet96bff762019-12-17 13:46:18 +01003098 conn_set_mark(objt_conn(sess->origin), rule->arg.http.i);
Christopher Faulet3e964192018-10-24 11:39:23 +02003099 break;
3100
3101 case ACT_HTTP_SET_LOGL:
Christopher Faulet96bff762019-12-17 13:46:18 +01003102 s->logs.level = rule->arg.http.i;
Christopher Faulet3e964192018-10-24 11:39:23 +02003103 break;
3104
Christopher Faulet3e964192018-10-24 11:39:23 +02003105 case ACT_HTTP_DEL_HDR:
3106 /* remove all occurrences of the header */
3107 ctx.blk = NULL;
Christopher Faulet96bff762019-12-17 13:46:18 +01003108 while (http_find_header(htx, rule->arg.http.str, &ctx, 1))
Christopher Faulet3e964192018-10-24 11:39:23 +02003109 http_remove_header(htx, &ctx);
3110 break;
3111
Christopher Faulet3e964192018-10-24 11:39:23 +02003112 case ACT_HTTP_REDIR:
Christopher Faulet49c2a702020-03-06 15:44:37 +01003113 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003114 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
Christopher Faulet3a26bee2019-12-16 12:47:40 +01003115 rule_ret = HTTP_RULE_RES_ERROR;
Christopher Faulet3e964192018-10-24 11:39:23 +02003116 goto end;
3117
Christopher Fauletcd26e8a2019-12-18 11:13:39 +01003118 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003119 default:
3120 break;
3121 }
3122 }
3123
3124 end:
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003125 /* if the ruleset evaluation is finished reset the strict mode */
Christopher Faulet46f95542019-12-20 10:07:22 +01003126 if (rule_ret != HTTP_RULE_RES_YIELD)
Christopher Faulet1aea50e2020-01-17 16:03:53 +01003127 txn->rsp.flags &= ~HTTP_MSGF_SOFT_RW;
Christopher Faulet46f95542019-12-20 10:07:22 +01003128
Christopher Faulet3e964192018-10-24 11:39:23 +02003129 /* we reached the end of the rules, nothing to report */
3130 return rule_ret;
3131}
3132
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01003133/* Executes backend and frontend http-after-response rules for the stream <s>,
3134 * in that order. it return 1 on success and 0 on error. It is the caller
3135 * responsibility to catch error or ignore it. If it catches it, this function
3136 * may be called a second time, for the internal error.
3137 */
3138int http_eval_after_res_rules(struct stream *s)
3139{
3140 struct session *sess = s->sess;
3141 enum rule_result ret = HTTP_RULE_RES_CONT;
3142
3143 /* prune the request variables if not already done and swap to the response variables. */
3144 if (s->vars_reqres.scope != SCOPE_RES) {
3145 if (!LIST_ISEMPTY(&s->vars_reqres.head))
3146 vars_prune(&s->vars_reqres, s->sess, s);
3147 vars_init(&s->vars_reqres, SCOPE_RES);
3148 }
3149
3150 ret = http_res_get_intercept_rule(s->be, &s->be->http_after_res_rules, s);
3151 if ((ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP) && sess->fe != s->be)
3152 ret = http_res_get_intercept_rule(sess->fe, &sess->fe->http_after_res_rules, s);
3153
3154 /* All other codes than CONTINUE, STOP or DONE are forbidden */
3155 return (ret == HTTP_RULE_RES_CONT || ret == HTTP_RULE_RES_STOP || ret == HTTP_RULE_RES_DONE);
3156}
3157
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003158/*
3159 * Manage client-side cookie. It can impact performance by about 2% so it is
3160 * desirable to call it only when needed. This code is quite complex because
3161 * of the multiple very crappy and ambiguous syntaxes we have to support. it
3162 * highly recommended not to touch this part without a good reason !
3163 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003164static void http_manage_client_side_cookies(struct stream *s, struct channel *req)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003165{
3166 struct session *sess = s->sess;
3167 struct http_txn *txn = s->txn;
3168 struct htx *htx;
3169 struct http_hdr_ctx ctx;
3170 char *hdr_beg, *hdr_end, *del_from;
3171 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
3172 int preserve_hdr;
3173
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003174 htx = htxbuf(&req->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003175 ctx.blk = NULL;
3176 while (http_find_header(htx, ist("Cookie"), &ctx, 1)) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003177 int is_first = 1;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003178 del_from = NULL; /* nothing to be deleted */
3179 preserve_hdr = 0; /* assume we may kill the whole header */
3180
3181 /* Now look for cookies. Conforming to RFC2109, we have to support
3182 * attributes whose name begin with a '$', and associate them with
3183 * the right cookie, if we want to delete this cookie.
3184 * So there are 3 cases for each cookie read :
3185 * 1) it's a special attribute, beginning with a '$' : ignore it.
3186 * 2) it's a server id cookie that we *MAY* want to delete : save
3187 * some pointers on it (last semi-colon, beginning of cookie...)
3188 * 3) it's an application cookie : we *MAY* have to delete a previous
3189 * "special" cookie.
3190 * At the end of loop, if a "special" cookie remains, we may have to
3191 * remove it. If no application cookie persists in the header, we
3192 * *MUST* delete it.
3193 *
3194 * Note: RFC2965 is unclear about the processing of spaces around
3195 * the equal sign in the ATTR=VALUE form. A careful inspection of
3196 * the RFC explicitly allows spaces before it, and not within the
3197 * tokens (attrs or values). An inspection of RFC2109 allows that
3198 * too but section 10.1.3 lets one think that spaces may be allowed
3199 * after the equal sign too, resulting in some (rare) buggy
3200 * implementations trying to do that. So let's do what servers do.
3201 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
3202 * allowed quoted strings in values, with any possible character
3203 * after a backslash, including control chars and delimitors, which
3204 * causes parsing to become ambiguous. Browsers also allow spaces
3205 * within values even without quotes.
3206 *
3207 * We have to keep multiple pointers in order to support cookie
3208 * removal at the beginning, middle or end of header without
3209 * corrupting the header. All of these headers are valid :
3210 *
3211 * hdr_beg hdr_end
3212 * | |
3213 * v |
3214 * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 |
3215 * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v
3216 * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3
3217 * | | | | | | |
3218 * | | | | | | |
3219 * | | | | | | +--> next
3220 * | | | | | +----> val_end
3221 * | | | | +-----------> val_beg
3222 * | | | +--------------> equal
3223 * | | +----------------> att_end
3224 * | +---------------------> att_beg
3225 * +--------------------------> prev
3226 *
3227 */
3228 hdr_beg = ctx.value.ptr;
3229 hdr_end = hdr_beg + ctx.value.len;
3230 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3231 /* Iterate through all cookies on this line */
3232
3233 /* find att_beg */
3234 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003235 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003236 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003237 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003238
3239 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3240 att_beg++;
3241
3242 /* find att_end : this is the first character after the last non
3243 * space before the equal. It may be equal to hdr_end.
3244 */
3245 equal = att_end = att_beg;
3246 while (equal < hdr_end) {
3247 if (*equal == '=' || *equal == ',' || *equal == ';')
3248 break;
3249 if (HTTP_IS_SPHT(*equal++))
3250 continue;
3251 att_end = equal;
3252 }
3253
3254 /* here, <equal> points to '=', a delimitor or the end. <att_end>
3255 * is between <att_beg> and <equal>, both may be identical.
3256 */
3257 /* look for end of cookie if there is an equal sign */
3258 if (equal < hdr_end && *equal == '=') {
3259 /* look for the beginning of the value */
3260 val_beg = equal + 1;
3261 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3262 val_beg++;
3263
3264 /* find the end of the value, respecting quotes */
3265 next = http_find_cookie_value_end(val_beg, hdr_end);
3266
3267 /* make val_end point to the first white space or delimitor after the value */
3268 val_end = next;
3269 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3270 val_end--;
3271 }
3272 else
3273 val_beg = val_end = next = equal;
3274
3275 /* We have nothing to do with attributes beginning with
3276 * '$'. However, they will automatically be removed if a
3277 * header before them is removed, since they're supposed
3278 * to be linked together.
3279 */
3280 if (*att_beg == '$')
3281 continue;
3282
3283 /* Ignore cookies with no equal sign */
3284 if (equal == next) {
3285 /* This is not our cookie, so we must preserve it. But if we already
3286 * scheduled another cookie for removal, we cannot remove the
3287 * complete header, but we can remove the previous block itself.
3288 */
3289 preserve_hdr = 1;
3290 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003291 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003292 val_end += delta;
3293 next += delta;
3294 hdr_end += delta;
3295 prev = del_from;
3296 del_from = NULL;
3297 }
3298 continue;
3299 }
3300
3301 /* if there are spaces around the equal sign, we need to
3302 * strip them otherwise we'll get trouble for cookie captures,
3303 * or even for rewrites. Since this happens extremely rarely,
3304 * it does not hurt performance.
3305 */
3306 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3307 int stripped_before = 0;
3308 int stripped_after = 0;
3309
3310 if (att_end != equal) {
3311 memmove(att_end, equal, hdr_end - equal);
3312 stripped_before = (att_end - equal);
3313 equal += stripped_before;
3314 val_beg += stripped_before;
3315 }
3316
3317 if (val_beg > equal + 1) {
3318 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3319 stripped_after = (equal + 1) - val_beg;
3320 val_beg += stripped_after;
3321 stripped_before += stripped_after;
3322 }
3323
3324 val_end += stripped_before;
3325 next += stripped_before;
3326 hdr_end += stripped_before;
3327 }
3328 /* now everything is as on the diagram above */
3329
3330 /* First, let's see if we want to capture this cookie. We check
3331 * that we don't already have a client side cookie, because we
3332 * can only capture one. Also as an optimisation, we ignore
3333 * cookies shorter than the declared name.
3334 */
3335 if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
3336 (val_end - att_beg >= sess->fe->capture_namelen) &&
3337 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3338 int log_len = val_end - att_beg;
3339
3340 if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
3341 ha_alert("HTTP logging : out of memory.\n");
3342 } else {
3343 if (log_len > sess->fe->capture_len)
3344 log_len = sess->fe->capture_len;
3345 memcpy(txn->cli_cookie, att_beg, log_len);
3346 txn->cli_cookie[log_len] = 0;
3347 }
3348 }
3349
3350 /* Persistence cookies in passive, rewrite or insert mode have the
3351 * following form :
3352 *
3353 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
3354 *
3355 * For cookies in prefix mode, the form is :
3356 *
3357 * Cookie: NAME=SRV~VALUE
3358 */
3359 if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3360 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3361 struct server *srv = s->be->srv;
3362 char *delim;
3363
3364 /* if we're in cookie prefix mode, we'll search the delimitor so that we
3365 * have the server ID between val_beg and delim, and the original cookie between
3366 * delim+1 and val_end. Otherwise, delim==val_end :
3367 *
3368 * hdr_beg
3369 * |
3370 * v
3371 * NAME=SRV; # in all but prefix modes
3372 * NAME=SRV~OPAQUE ; # in prefix mode
3373 * || || | |+-> next
3374 * || || | +--> val_end
3375 * || || +---------> delim
3376 * || |+------------> val_beg
3377 * || +-------------> att_end = equal
3378 * |+-----------------> att_beg
3379 * +------------------> prev
3380 *
3381 */
3382 if (s->be->ck_opts & PR_CK_PFX) {
3383 for (delim = val_beg; delim < val_end; delim++)
3384 if (*delim == COOKIE_DELIM)
3385 break;
3386 }
3387 else {
3388 char *vbar1;
3389 delim = val_end;
3390 /* Now check if the cookie contains a date field, which would
3391 * appear after a vertical bar ('|') just after the server name
3392 * and before the delimiter.
3393 */
3394 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
3395 if (vbar1) {
3396 /* OK, so left of the bar is the server's cookie and
3397 * right is the last seen date. It is a base64 encoded
3398 * 30-bit value representing the UNIX date since the
3399 * epoch in 4-second quantities.
3400 */
3401 int val;
3402 delim = vbar1++;
3403 if (val_end - vbar1 >= 5) {
3404 val = b64tos30(vbar1);
3405 if (val > 0)
3406 txn->cookie_last_date = val << 2;
3407 }
3408 /* look for a second vertical bar */
3409 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
3410 if (vbar1 && (val_end - vbar1 > 5)) {
3411 val = b64tos30(vbar1 + 1);
3412 if (val > 0)
3413 txn->cookie_first_date = val << 2;
3414 }
3415 }
3416 }
3417
3418 /* if the cookie has an expiration date and the proxy wants to check
3419 * it, then we do that now. We first check if the cookie is too old,
3420 * then only if it has expired. We detect strict overflow because the
3421 * time resolution here is not great (4 seconds). Cookies with dates
3422 * in the future are ignored if their offset is beyond one day. This
3423 * allows an admin to fix timezone issues without expiring everyone
3424 * and at the same time avoids keeping unwanted side effects for too
3425 * long.
3426 */
3427 if (txn->cookie_first_date && s->be->cookie_maxlife &&
3428 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
3429 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
3430 txn->flags &= ~TX_CK_MASK;
3431 txn->flags |= TX_CK_OLD;
3432 delim = val_beg; // let's pretend we have not found the cookie
3433 txn->cookie_first_date = 0;
3434 txn->cookie_last_date = 0;
3435 }
3436 else if (txn->cookie_last_date && s->be->cookie_maxidle &&
3437 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
3438 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
3439 txn->flags &= ~TX_CK_MASK;
3440 txn->flags |= TX_CK_EXPIRED;
3441 delim = val_beg; // let's pretend we have not found the cookie
3442 txn->cookie_first_date = 0;
3443 txn->cookie_last_date = 0;
3444 }
3445
3446 /* Here, we'll look for the first running server which supports the cookie.
3447 * This allows to share a same cookie between several servers, for example
3448 * to dedicate backup servers to specific servers only.
3449 * However, to prevent clients from sticking to cookie-less backup server
3450 * when they have incidentely learned an empty cookie, we simply ignore
3451 * empty cookies and mark them as invalid.
3452 * The same behaviour is applied when persistence must be ignored.
3453 */
3454 if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3455 srv = NULL;
3456
3457 while (srv) {
3458 if (srv->cookie && (srv->cklen == delim - val_beg) &&
3459 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
3460 if ((srv->cur_state != SRV_ST_STOPPED) ||
3461 (s->be->options & PR_O_PERSIST) ||
3462 (s->flags & SF_FORCE_PRST)) {
3463 /* we found the server and we can use it */
3464 txn->flags &= ~TX_CK_MASK;
3465 txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
3466 s->flags |= SF_DIRECT | SF_ASSIGNED;
3467 s->target = &srv->obj_type;
3468 break;
3469 } else {
3470 /* we found a server, but it's down,
3471 * mark it as such and go on in case
3472 * another one is available.
3473 */
3474 txn->flags &= ~TX_CK_MASK;
3475 txn->flags |= TX_CK_DOWN;
3476 }
3477 }
3478 srv = srv->next;
3479 }
3480
3481 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
3482 /* no server matched this cookie or we deliberately skipped it */
3483 txn->flags &= ~TX_CK_MASK;
3484 if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
3485 txn->flags |= TX_CK_UNUSED;
3486 else
3487 txn->flags |= TX_CK_INVALID;
3488 }
3489
3490 /* depending on the cookie mode, we may have to either :
3491 * - delete the complete cookie if we're in insert+indirect mode, so that
3492 * the server never sees it ;
3493 * - remove the server id from the cookie value, and tag the cookie as an
Joseph Herlante9d5c722018-11-25 11:00:25 -08003494 * application cookie so that it does not get accidentally removed later,
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003495 * if we're in cookie prefix mode
3496 */
3497 if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
3498 int delta; /* negative */
3499
3500 memmove(val_beg, delim + 1, hdr_end - (delim + 1));
3501 delta = val_beg - (delim + 1);
3502 val_end += delta;
3503 next += delta;
3504 hdr_end += delta;
3505 del_from = NULL;
3506 preserve_hdr = 1; /* we want to keep this cookie */
3507 }
3508 else if (del_from == NULL &&
3509 (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
3510 del_from = prev;
3511 }
3512 }
3513 else {
3514 /* This is not our cookie, so we must preserve it. But if we already
3515 * scheduled another cookie for removal, we cannot remove the
3516 * complete header, but we can remove the previous block itself.
3517 */
3518 preserve_hdr = 1;
3519
3520 if (del_from != NULL) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003521 int delta = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003522 if (att_beg >= del_from)
3523 att_beg += delta;
3524 if (att_end >= del_from)
3525 att_end += delta;
3526 val_beg += delta;
3527 val_end += delta;
3528 next += delta;
3529 hdr_end += delta;
3530 prev = del_from;
3531 del_from = NULL;
3532 }
3533 }
3534
3535 /* continue with next cookie on this header line */
3536 att_beg = next;
3537 } /* for each cookie */
3538
3539
3540 /* There are no more cookies on this line.
3541 * We may still have one (or several) marked for deletion at the
3542 * end of the line. We must do this now in two ways :
3543 * - if some cookies must be preserved, we only delete from the
3544 * mark to the end of line ;
3545 * - if nothing needs to be preserved, simply delete the whole header
3546 */
3547 if (del_from) {
3548 hdr_end = (preserve_hdr ? del_from : hdr_beg);
3549 }
3550 if ((hdr_end - hdr_beg) != ctx.value.len) {
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003551 if (hdr_beg != hdr_end)
3552 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003553 else
3554 http_remove_header(htx, &ctx);
3555 }
3556 } /* for each "Cookie header */
3557}
3558
3559/*
3560 * Manage server-side cookies. It can impact performance by about 2% so it is
3561 * desirable to call it only when needed. This function is also used when we
3562 * just need to know if there is a cookie (eg: for check-cache).
3563 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003564static void http_manage_server_side_cookies(struct stream *s, struct channel *res)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003565{
3566 struct session *sess = s->sess;
3567 struct http_txn *txn = s->txn;
3568 struct htx *htx;
3569 struct http_hdr_ctx ctx;
3570 struct server *srv;
3571 char *hdr_beg, *hdr_end;
3572 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau6f7a02a2019-04-15 21:49:49 +02003573 int is_cookie2 = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003574
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003575 htx = htxbuf(&res->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003576
3577 ctx.blk = NULL;
3578 while (1) {
Olivier Houchardf0f42382019-07-22 17:43:46 +02003579 int is_first = 1;
3580
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003581 if (!http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) {
3582 if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1))
3583 break;
3584 is_cookie2 = 1;
3585 }
3586
3587 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
3588 * <prev> points to the colon.
3589 */
3590 txn->flags |= TX_SCK_PRESENT;
3591
3592 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
3593 * check-cache is enabled) and we are not interested in checking
3594 * them. Warning, the cookie capture is declared in the frontend.
3595 */
3596 if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
3597 break;
3598
3599 /* OK so now we know we have to process this response cookie.
3600 * The format of the Set-Cookie header is slightly different
3601 * from the format of the Cookie header in that it does not
3602 * support the comma as a cookie delimiter (thus the header
3603 * cannot be folded) because the Expires attribute described in
3604 * the original Netscape's spec may contain an unquoted date
3605 * with a comma inside. We have to live with this because
3606 * many browsers don't support Max-Age and some browsers don't
3607 * support quoted strings. However the Set-Cookie2 header is
3608 * clean.
3609 *
3610 * We have to keep multiple pointers in order to support cookie
3611 * removal at the beginning, middle or end of header without
3612 * corrupting the header (in case of set-cookie2). A special
3613 * pointer, <scav> points to the beginning of the set-cookie-av
3614 * fields after the first semi-colon. The <next> pointer points
3615 * either to the end of line (set-cookie) or next unquoted comma
3616 * (set-cookie2). All of these headers are valid :
3617 *
3618 * hdr_beg hdr_end
3619 * | |
3620 * v |
3621 * NAME1 = VALUE 1 ; Secure; Path="/" |
3622 * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v
3623 * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT
3624 * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard
3625 * | | | | | | | |
3626 * | | | | | | | +-> next
3627 * | | | | | | +------------> scav
3628 * | | | | | +--------------> val_end
3629 * | | | | +--------------------> val_beg
3630 * | | | +----------------------> equal
3631 * | | +------------------------> att_end
3632 * | +----------------------------> att_beg
3633 * +------------------------------> prev
3634 * -------------------------------> hdr_beg
3635 */
3636 hdr_beg = ctx.value.ptr;
3637 hdr_end = hdr_beg + ctx.value.len;
3638 for (prev = hdr_beg; prev < hdr_end; prev = next) {
3639
3640 /* Iterate through all cookies on this line */
3641
3642 /* find att_beg */
3643 att_beg = prev;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003644 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003645 att_beg++;
Olivier Houchardf0f42382019-07-22 17:43:46 +02003646 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003647
3648 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
3649 att_beg++;
3650
3651 /* find att_end : this is the first character after the last non
3652 * space before the equal. It may be equal to hdr_end.
3653 */
3654 equal = att_end = att_beg;
3655
3656 while (equal < hdr_end) {
3657 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
3658 break;
3659 if (HTTP_IS_SPHT(*equal++))
3660 continue;
3661 att_end = equal;
3662 }
3663
3664 /* here, <equal> points to '=', a delimitor or the end. <att_end>
3665 * is between <att_beg> and <equal>, both may be identical.
3666 */
3667
3668 /* look for end of cookie if there is an equal sign */
3669 if (equal < hdr_end && *equal == '=') {
3670 /* look for the beginning of the value */
3671 val_beg = equal + 1;
3672 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
3673 val_beg++;
3674
3675 /* find the end of the value, respecting quotes */
3676 next = http_find_cookie_value_end(val_beg, hdr_end);
3677
3678 /* make val_end point to the first white space or delimitor after the value */
3679 val_end = next;
3680 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
3681 val_end--;
3682 }
3683 else {
3684 /* <equal> points to next comma, semi-colon or EOL */
3685 val_beg = val_end = next = equal;
3686 }
3687
3688 if (next < hdr_end) {
3689 /* Set-Cookie2 supports multiple cookies, and <next> points to
3690 * a colon or semi-colon before the end. So skip all attr-value
3691 * pairs and look for the next comma. For Set-Cookie, since
3692 * commas are permitted in values, skip to the end.
3693 */
3694 if (is_cookie2)
3695 next = http_find_hdr_value_end(next, hdr_end);
3696 else
3697 next = hdr_end;
3698 }
3699
3700 /* Now everything is as on the diagram above */
3701
3702 /* Ignore cookies with no equal sign */
3703 if (equal == val_end)
3704 continue;
3705
3706 /* If there are spaces around the equal sign, we need to
3707 * strip them otherwise we'll get trouble for cookie captures,
3708 * or even for rewrites. Since this happens extremely rarely,
3709 * it does not hurt performance.
3710 */
3711 if (unlikely(att_end != equal || val_beg > equal + 1)) {
3712 int stripped_before = 0;
3713 int stripped_after = 0;
3714
3715 if (att_end != equal) {
3716 memmove(att_end, equal, hdr_end - equal);
3717 stripped_before = (att_end - equal);
3718 equal += stripped_before;
3719 val_beg += stripped_before;
3720 }
3721
3722 if (val_beg > equal + 1) {
3723 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
3724 stripped_after = (equal + 1) - val_beg;
3725 val_beg += stripped_after;
3726 stripped_before += stripped_after;
3727 }
3728
3729 val_end += stripped_before;
3730 next += stripped_before;
3731 hdr_end += stripped_before;
3732
Christopher Faulet3e2638e2019-06-18 09:49:16 +02003733 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003734 ctx.value.len = hdr_end - hdr_beg;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003735 }
3736
3737 /* First, let's see if we want to capture this cookie. We check
3738 * that we don't already have a server side cookie, because we
3739 * can only capture one. Also as an optimisation, we ignore
3740 * cookies shorter than the declared name.
3741 */
3742 if (sess->fe->capture_name != NULL &&
3743 txn->srv_cookie == NULL &&
3744 (val_end - att_beg >= sess->fe->capture_namelen) &&
3745 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
3746 int log_len = val_end - att_beg;
3747 if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
3748 ha_alert("HTTP logging : out of memory.\n");
3749 }
3750 else {
3751 if (log_len > sess->fe->capture_len)
3752 log_len = sess->fe->capture_len;
3753 memcpy(txn->srv_cookie, att_beg, log_len);
3754 txn->srv_cookie[log_len] = 0;
3755 }
3756 }
3757
3758 srv = objt_server(s->target);
3759 /* now check if we need to process it for persistence */
3760 if (!(s->flags & SF_IGNORE_PRST) &&
3761 (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
3762 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
3763 /* assume passive cookie by default */
3764 txn->flags &= ~TX_SCK_MASK;
3765 txn->flags |= TX_SCK_FOUND;
3766
3767 /* If the cookie is in insert mode on a known server, we'll delete
3768 * this occurrence because we'll insert another one later.
3769 * We'll delete it too if the "indirect" option is set and we're in
3770 * a direct access.
3771 */
3772 if (s->be->ck_opts & PR_CK_PSV) {
3773 /* The "preserve" flag was set, we don't want to touch the
3774 * server's cookie.
3775 */
3776 }
3777 else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
3778 ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
3779 /* this cookie must be deleted */
3780 if (prev == hdr_beg && next == hdr_end) {
3781 /* whole header */
3782 http_remove_header(htx, &ctx);
3783 /* note: while both invalid now, <next> and <hdr_end>
3784 * are still equal, so the for() will stop as expected.
3785 */
3786 } else {
3787 /* just remove the value */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003788 int delta = http_del_hdr_value(hdr_beg, hdr_end, &prev, next);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003789 next = prev;
3790 hdr_end += delta;
3791 }
3792 txn->flags &= ~TX_SCK_MASK;
3793 txn->flags |= TX_SCK_DELETED;
3794 /* and go on with next cookie */
3795 }
3796 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
3797 /* replace bytes val_beg->val_end with the cookie name associated
3798 * with this server since we know it.
3799 */
3800 int sliding, delta;
3801
3802 ctx.value = ist2(val_beg, val_end - val_beg);
3803 ctx.lws_before = ctx.lws_after = 0;
3804 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen));
3805 delta = srv->cklen - (val_end - val_beg);
3806 sliding = (ctx.value.ptr - val_beg);
3807 hdr_beg += sliding;
3808 val_beg += sliding;
3809 next += sliding + delta;
3810 hdr_end += sliding + delta;
3811
3812 txn->flags &= ~TX_SCK_MASK;
3813 txn->flags |= TX_SCK_REPLACED;
3814 }
3815 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
3816 /* insert the cookie name associated with this server
3817 * before existing cookie, and insert a delimiter between them..
3818 */
3819 int sliding, delta;
3820 ctx.value = ist2(val_beg, 0);
3821 ctx.lws_before = ctx.lws_after = 0;
3822 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1));
3823 delta = srv->cklen + 1;
3824 sliding = (ctx.value.ptr - val_beg);
3825 hdr_beg += sliding;
3826 val_beg += sliding;
3827 next += sliding + delta;
3828 hdr_end += sliding + delta;
3829
3830 val_beg[srv->cklen] = COOKIE_DELIM;
3831 txn->flags &= ~TX_SCK_MASK;
3832 txn->flags |= TX_SCK_REPLACED;
3833 }
3834 }
3835 /* that's done for this cookie, check the next one on the same
3836 * line when next != hdr_end (only if is_cookie2).
3837 */
3838 }
3839 }
3840}
3841
Christopher Faulet25a02f62018-10-24 12:00:25 +02003842/*
3843 * Parses the Cache-Control and Pragma request header fields to determine if
3844 * the request may be served from the cache and/or if it is cacheable. Updates
3845 * s->txn->flags.
3846 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003847void http_check_request_for_cacheability(struct stream *s, struct channel *req)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003848{
3849 struct http_txn *txn = s->txn;
3850 struct htx *htx;
3851 int32_t pos;
3852 int pragma_found, cc_found, i;
3853
3854 if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
3855 return; /* nothing more to do here */
3856
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003857 htx = htxbuf(&req->buf);
Christopher Faulet25a02f62018-10-24 12:00:25 +02003858 pragma_found = cc_found = 0;
Christopher Fauleta3f15502019-05-13 15:27:23 +02003859 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003860 struct htx_blk *blk = htx_get_blk(htx, pos);
3861 enum htx_blk_type type = htx_get_blk_type(blk);
3862 struct ist n, v;
3863
3864 if (type == HTX_BLK_EOH)
3865 break;
3866 if (type != HTX_BLK_HDR)
3867 continue;
3868
3869 n = htx_get_blk_name(htx, blk);
3870 v = htx_get_blk_value(htx, blk);
3871
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003872 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003873 if (v.len >= 8 && strncasecmp(v.ptr, "no-cache", 8) == 0) {
3874 pragma_found = 1;
3875 continue;
3876 }
3877 }
3878
3879 /* Don't use the cache and don't try to store if we found the
3880 * Authorization header */
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003881 if (isteq(n, ist("authorization"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003882 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3883 txn->flags |= TX_CACHE_IGNORE;
3884 continue;
3885 }
3886
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003887 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02003888 continue;
3889
3890 /* OK, right now we know we have a cache-control header */
3891 cc_found = 1;
3892 if (!v.len) /* no info */
3893 continue;
3894
3895 i = 0;
3896 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
3897 !isspace((unsigned char)*(v.ptr+i)))
3898 i++;
3899
3900 /* we have a complete value between v.ptr and (v.ptr+i). We don't check the
3901 * values after max-age, max-stale nor min-fresh, we simply don't
3902 * use the cache when they're specified.
3903 */
3904 if (((i == 7) && strncasecmp(v.ptr, "max-age", 7) == 0) ||
3905 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
3906 ((i == 9) && strncasecmp(v.ptr, "max-stale", 9) == 0) ||
3907 ((i == 9) && strncasecmp(v.ptr, "min-fresh", 9) == 0)) {
3908 txn->flags |= TX_CACHE_IGNORE;
3909 continue;
3910 }
3911
3912 if ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0) {
3913 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3914 continue;
3915 }
3916 }
3917
3918 /* RFC7234#5.4:
3919 * When the Cache-Control header field is also present and
3920 * understood in a request, Pragma is ignored.
3921 * When the Cache-Control header field is not present in a
3922 * request, caches MUST consider the no-cache request
3923 * pragma-directive as having the same effect as if
3924 * "Cache-Control: no-cache" were present.
3925 */
3926 if (!cc_found && pragma_found)
3927 txn->flags |= TX_CACHE_IGNORE;
3928}
3929
3930/*
3931 * Check if response is cacheable or not. Updates s->txn->flags.
3932 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02003933void http_check_response_for_cacheability(struct stream *s, struct channel *res)
Christopher Faulet25a02f62018-10-24 12:00:25 +02003934{
3935 struct http_txn *txn = s->txn;
3936 struct htx *htx;
3937 int32_t pos;
3938 int i;
3939
3940 if (txn->status < 200) {
3941 /* do not try to cache interim responses! */
3942 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3943 return;
3944 }
3945
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003946 htx = htxbuf(&res->buf);
Christopher Fauleta3f15502019-05-13 15:27:23 +02003947 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003948 struct htx_blk *blk = htx_get_blk(htx, pos);
3949 enum htx_blk_type type = htx_get_blk_type(blk);
3950 struct ist n, v;
3951
3952 if (type == HTX_BLK_EOH)
3953 break;
3954 if (type != HTX_BLK_HDR)
3955 continue;
3956
3957 n = htx_get_blk_name(htx, blk);
3958 v = htx_get_blk_value(htx, blk);
3959
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003960 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02003961 if ((v.len >= 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) {
3962 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3963 return;
3964 }
3965 }
3966
Willy Tarreau2e754bf2018-12-07 11:38:03 +01003967 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02003968 continue;
3969
3970 /* OK, right now we know we have a cache-control header */
3971 if (!v.len) /* no info */
3972 continue;
3973
3974 i = 0;
3975 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
3976 !isspace((unsigned char)*(v.ptr+i)))
3977 i++;
3978
3979 /* we have a complete value between v.ptr and (v.ptr+i) */
3980 if (i < v.len && *(v.ptr + i) == '=') {
3981 if (((v.len - i) > 1 && (i == 7) && strncasecmp(v.ptr, "max-age=0", 9) == 0) ||
3982 ((v.len - i) > 1 && (i == 8) && strncasecmp(v.ptr, "s-maxage=0", 10) == 0)) {
3983 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
3984 continue;
3985 }
3986
3987 /* we have something of the form no-cache="set-cookie" */
3988 if ((v.len >= 21) &&
3989 strncasecmp(v.ptr, "no-cache=\"set-cookie", 20) == 0
3990 && (*(v.ptr + 20) == '"' || *(v.ptr + 20 ) == ','))
3991 txn->flags &= ~TX_CACHE_COOK;
3992 continue;
3993 }
3994
3995 /* OK, so we know that either p2 points to the end of string or to a comma */
3996 if (((i == 7) && strncasecmp(v.ptr, "private", 7) == 0) ||
3997 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
3998 ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0)) {
3999 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4000 return;
4001 }
4002
4003 if ((i == 6) && strncasecmp(v.ptr, "public", 6) == 0) {
4004 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4005 continue;
4006 }
4007 }
4008}
4009
Christopher Faulet377c5a52018-10-24 21:21:30 +02004010/*
4011 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
4012 * for the current backend.
4013 *
4014 * It is assumed that the request is either a HEAD, GET, or POST and that the
4015 * uri_auth field is valid.
4016 *
4017 * Returns 1 if stats should be provided, otherwise 0.
4018 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004019static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend)
Christopher Faulet377c5a52018-10-24 21:21:30 +02004020{
4021 struct uri_auth *uri_auth = backend->uri_auth;
4022 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004023 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004024 struct ist uri;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004025
4026 if (!uri_auth)
4027 return 0;
4028
4029 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
4030 return 0;
4031
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004032 htx = htxbuf(&s->req.buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004033 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004034 uri = htx_sl_req_uri(sl);
Willy Tarreau1eb3b482019-10-31 15:50:28 +01004035 if (*uri_auth->uri_prefix == '/')
4036 uri = http_get_path(uri);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004037
4038 /* check URI size */
4039 if (uri_auth->uri_len > uri.len)
4040 return 0;
4041
4042 if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
4043 return 0;
4044
4045 return 1;
4046}
4047
4048/* This function prepares an applet to handle the stats. It can deal with the
4049 * "100-continue" expectation, check that admin rules are met for POST requests,
4050 * and program a response message if something was unexpected. It cannot fail
4051 * and always relies on the stats applet to complete the job. It does not touch
4052 * analysers nor counters, which are left to the caller. It does not touch
4053 * s->target which is supposed to already point to the stats applet. The caller
4054 * is expected to have already assigned an appctx to the stream.
4055 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004056static int http_handle_stats(struct stream *s, struct channel *req)
Christopher Faulet377c5a52018-10-24 21:21:30 +02004057{
4058 struct stats_admin_rule *stats_admin_rule;
4059 struct stream_interface *si = &s->si[1];
4060 struct session *sess = s->sess;
4061 struct http_txn *txn = s->txn;
4062 struct http_msg *msg = &txn->req;
4063 struct uri_auth *uri_auth = s->be->uri_auth;
4064 const char *h, *lookup, *end;
4065 struct appctx *appctx;
4066 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004067 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004068
4069 appctx = si_appctx(si);
4070 memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
4071 appctx->st1 = appctx->st2 = 0;
4072 appctx->ctx.stats.st_code = STAT_STATUS_INIT;
Willy Tarreau676c29e2019-10-09 10:50:01 +02004073 appctx->ctx.stats.flags |= uri_auth->flags;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004074 appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
4075 if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD))
4076 appctx->ctx.stats.flags |= STAT_CHUNKED;
4077
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004078 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004079 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004080 lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len;
4081 end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004082
4083 for (h = lookup; h <= end - 3; h++) {
4084 if (memcmp(h, ";up", 3) == 0) {
4085 appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
4086 break;
4087 }
4088 }
4089
4090 if (uri_auth->refresh) {
4091 for (h = lookup; h <= end - 10; h++) {
4092 if (memcmp(h, ";norefresh", 10) == 0) {
4093 appctx->ctx.stats.flags |= STAT_NO_REFRESH;
4094 break;
4095 }
4096 }
4097 }
4098
4099 for (h = lookup; h <= end - 4; h++) {
4100 if (memcmp(h, ";csv", 4) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004101 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004102 break;
4103 }
4104 }
4105
4106 for (h = lookup; h <= end - 6; h++) {
4107 if (memcmp(h, ";typed", 6) == 0) {
Christopher Faulet6338a082019-09-09 15:50:54 +02004108 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004109 appctx->ctx.stats.flags |= STAT_FMT_TYPED;
4110 break;
4111 }
4112 }
4113
Christopher Faulet6338a082019-09-09 15:50:54 +02004114 for (h = lookup; h <= end - 5; h++) {
4115 if (memcmp(h, ";json", 5) == 0) {
4116 appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM);
4117 appctx->ctx.stats.flags |= STAT_FMT_JSON;
4118 break;
4119 }
4120 }
4121
4122 for (h = lookup; h <= end - 12; h++) {
4123 if (memcmp(h, ";json-schema", 12) == 0) {
4124 appctx->ctx.stats.flags &= ~STAT_FMT_MASK;
4125 appctx->ctx.stats.flags |= STAT_JSON_SCHM;
4126 break;
4127 }
4128 }
4129
Christopher Faulet377c5a52018-10-24 21:21:30 +02004130 for (h = lookup; h <= end - 8; h++) {
4131 if (memcmp(h, ";st=", 4) == 0) {
4132 int i;
4133 h += 4;
4134 appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
4135 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
4136 if (strncmp(stat_status_codes[i], h, 4) == 0) {
4137 appctx->ctx.stats.st_code = i;
4138 break;
4139 }
4140 }
4141 break;
4142 }
4143 }
4144
4145 appctx->ctx.stats.scope_str = 0;
4146 appctx->ctx.stats.scope_len = 0;
4147 for (h = lookup; h <= end - 8; h++) {
4148 if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
4149 int itx = 0;
4150 const char *h2;
4151 char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
4152 const char *err;
4153
4154 h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
4155 h2 = h;
Christopher Fauleted7a0662019-01-14 11:07:34 +01004156 appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl);
4157 while (h < end) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004158 if (*h == ';' || *h == '&' || *h == ' ')
4159 break;
4160 itx++;
4161 h++;
4162 }
4163
4164 if (itx > STAT_SCOPE_TXT_MAXLEN)
4165 itx = STAT_SCOPE_TXT_MAXLEN;
4166 appctx->ctx.stats.scope_len = itx;
4167
4168 /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
4169 memcpy(scope_txt, h2, itx);
4170 scope_txt[itx] = '\0';
4171 err = invalid_char(scope_txt);
4172 if (err) {
4173 /* bad char in search text => clear scope */
4174 appctx->ctx.stats.scope_str = 0;
4175 appctx->ctx.stats.scope_len = 0;
4176 }
4177 break;
4178 }
4179 }
4180
4181 /* now check whether we have some admin rules for this request */
4182 list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
4183 int ret = 1;
4184
4185 if (stats_admin_rule->cond) {
4186 ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
4187 ret = acl_pass(ret);
4188 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
4189 ret = !ret;
4190 }
4191
4192 if (ret) {
4193 /* no rule, or the rule matches */
4194 appctx->ctx.stats.flags |= STAT_ADMIN;
4195 break;
4196 }
4197 }
4198
Christopher Faulet5d45e382019-02-27 15:15:23 +01004199 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
4200 appctx->st0 = STAT_HTTP_HEAD;
4201 else if (txn->meth == HTTP_METH_POST) {
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004202 if (appctx->ctx.stats.flags & STAT_ADMIN) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004203 appctx->st0 = STAT_HTTP_POST;
Christopher Fauletbd9e8422019-08-15 22:26:48 +02004204 if (msg->msg_state < HTTP_MSG_DATA)
4205 req->analysers |= AN_REQ_HTTP_BODY;
4206 }
Christopher Faulet377c5a52018-10-24 21:21:30 +02004207 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004208 /* POST without admin level */
Christopher Faulet377c5a52018-10-24 21:21:30 +02004209 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4210 appctx->ctx.stats.st_code = STAT_STATUS_DENY;
4211 appctx->st0 = STAT_HTTP_LAST;
4212 }
4213 }
4214 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01004215 /* Unsupported method */
4216 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
4217 appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
4218 appctx->st0 = STAT_HTTP_LAST;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004219 }
4220
4221 s->task->nice = -32; /* small boost for HTTP statistics */
4222 return 1;
4223}
4224
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004225void http_perform_server_redirect(struct stream *s, struct stream_interface *si)
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004226{
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004227 struct channel *req = &s->req;
4228 struct channel *res = &s->res;
4229 struct server *srv;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004230 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004231 struct htx_sl *sl;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004232 struct ist path, location;
4233 unsigned int flags;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004234
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004235 /*
4236 * Create the location
4237 */
4238 chunk_reset(&trash);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004239
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004240 /* 1: add the server's prefix */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004241 /* special prefix "/" means don't change URL */
4242 srv = __objt_server(s->target);
4243 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
4244 if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len))
4245 return;
4246 }
4247
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004248 /* 2: add the request Path */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004249 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004250 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004251 path = http_get_path(htx_sl_req_uri(sl));
Tim Duesterhused526372020-03-05 17:56:33 +01004252 if (!isttest(path))
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004253 return;
4254
4255 if (!chunk_memcat(&trash, path.ptr, path.len))
4256 return;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004257 location = ist2(trash.area, trash.data);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004258
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004259 /*
4260 * Create the 302 respone
4261 */
4262 htx = htx_from_buf(&res->buf);
4263 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
4264 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4265 ist("HTTP/1.1"), ist("302"), ist("Found"));
4266 if (!sl)
4267 goto fail;
4268 sl->info.res.status = 302;
4269 s->txn->status = 302;
4270
4271 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
4272 !htx_add_header(htx, ist("Connection"), ist("close")) ||
4273 !htx_add_header(htx, ist("Content-length"), ist("0")) ||
4274 !htx_add_header(htx, ist("Location"), location))
4275 goto fail;
4276
4277 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
4278 goto fail;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004279
Christopher Fauletc20afb82020-01-24 19:16:26 +01004280 htx_to_buf(htx, &res->buf);
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004281 if (!http_forward_proxy_resp(s, 1))
4282 goto fail;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004283
4284 /* return without error. */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004285 si_shutr(si);
4286 si_shutw(si);
4287 si->err_type = SI_ET_NONE;
4288 si->state = SI_ST_CLO;
4289
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004290 if (!(s->flags & SF_ERR_MASK))
4291 s->flags |= SF_ERR_LOCAL;
4292 if (!(s->flags & SF_FINST_MASK))
4293 s->flags |= SF_FINST_C;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004294
4295 /* FIXME: we should increase a counter of redirects per server and per backend. */
4296 srv_inc_sess_ctr(srv);
4297 srv_set_sess_last(srv);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01004298 return;
4299
4300 fail:
4301 /* If an error occurred, remove the incomplete HTTP response from the
4302 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004303 channel_htx_truncate(res, htx);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02004304}
4305
Christopher Fauletf2824e62018-10-01 12:12:37 +02004306/* This function terminates the request because it was completly analyzed or
4307 * because an error was triggered during the body forwarding.
4308 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004309static void http_end_request(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004310{
4311 struct channel *chn = &s->req;
4312 struct http_txn *txn = s->txn;
4313
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004314 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004315
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004316 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4317 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004318 channel_abort(chn);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004319 channel_htx_truncate(chn, htxbuf(&chn->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02004320 goto end;
4321 }
4322
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004323 if (unlikely(txn->req.msg_state < HTTP_MSG_DONE)) {
4324 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004325 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004326 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004327
4328 if (txn->req.msg_state == HTTP_MSG_DONE) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004329 /* No need to read anymore, the request was completely parsed.
4330 * We can shut the read side unless we want to abort_on_close,
4331 * or we have a POST request. The issue with POST requests is
4332 * that some browsers still send a CRLF after the request, and
4333 * this CRLF must be read so that it does not remain in the kernel
4334 * buffers, otherwise a close could cause an RST on some systems
4335 * (eg: Linux).
4336 */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004337 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004338 channel_dont_read(chn);
4339
4340 /* if the server closes the connection, we want to immediately react
4341 * and close the socket to save packets and syscalls.
4342 */
4343 s->si[1].flags |= SI_FL_NOHALF;
4344
4345 /* In any case we've finished parsing the request so we must
4346 * disable Nagle when sending data because 1) we're not going
4347 * to shut this side, and 2) the server is waiting for us to
4348 * send pending data.
4349 */
4350 chn->flags |= CF_NEVER_WAIT;
4351
Christopher Fauletd01ce402019-01-02 17:44:13 +01004352 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
4353 /* The server has not finished to respond, so we
4354 * don't want to move in order not to upset it.
4355 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004356 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletd01ce402019-01-02 17:44:13 +01004357 return;
4358 }
4359
Christopher Fauletf2824e62018-10-01 12:12:37 +02004360 /* When we get here, it means that both the request and the
4361 * response have finished receiving. Depending on the connection
4362 * mode, we'll have to wait for the last bytes to leave in either
4363 * direction, and sometimes for a close to be effective.
4364 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004365 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004366 /* Tunnel mode will not have any analyser so it needs to
4367 * poll for reads.
4368 */
4369 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004370 if (b_data(&chn->buf)) {
4371 DBG_TRACE_DEVEL("waiting to flush the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Faulet9768c262018-10-22 09:34:31 +02004372 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004373 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004374 txn->req.msg_state = HTTP_MSG_TUNNEL;
4375 }
4376 else {
4377 /* we're not expecting any new data to come for this
4378 * transaction, so we can close it.
Christopher Faulet9768c262018-10-22 09:34:31 +02004379 *
4380 * However, there is an exception if the response
4381 * length is undefined. In this case, we need to wait
4382 * the close from the server. The response will be
4383 * switched in TUNNEL mode until the end.
Christopher Fauletf2824e62018-10-01 12:12:37 +02004384 */
4385 if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
4386 txn->rsp.msg_state != HTTP_MSG_CLOSED)
Christopher Faulet9768c262018-10-22 09:34:31 +02004387 goto check_channel_flags;
Christopher Fauletf2824e62018-10-01 12:12:37 +02004388
4389 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4390 channel_shutr_now(chn);
4391 channel_shutw_now(chn);
4392 }
4393 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004394 goto check_channel_flags;
4395 }
4396
4397 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
4398 http_msg_closing:
4399 /* nothing else to forward, just waiting for the output buffer
4400 * to be empty and for the shutw_now to take effect.
4401 */
4402 if (channel_is_empty(chn)) {
4403 txn->req.msg_state = HTTP_MSG_CLOSED;
4404 goto http_msg_closed;
4405 }
4406 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004407 txn->req.msg_state = HTTP_MSG_ERROR;
4408 goto end;
4409 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004410 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004411 return;
4412 }
4413
4414 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
4415 http_msg_closed:
Christopher Fauletf2824e62018-10-01 12:12:37 +02004416 /* if we don't know whether the server will close, we need to hard close */
4417 if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
4418 s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
Christopher Fauletf2824e62018-10-01 12:12:37 +02004419 /* see above in MSG_DONE why we only do this in these states */
Christopher Faulet769d0e92019-03-22 14:23:18 +01004420 if (!(s->be->options & PR_O_ABRT_CLOSE))
Christopher Fauletf2824e62018-10-01 12:12:37 +02004421 channel_dont_read(chn);
4422 goto end;
4423 }
4424
4425 check_channel_flags:
4426 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4427 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4428 /* if we've just closed an output, let's switch */
4429 txn->req.msg_state = HTTP_MSG_CLOSING;
4430 goto http_msg_closing;
4431 }
4432
4433 end:
4434 chn->analysers &= AN_REQ_FLT_END;
4435 if (txn->req.msg_state == HTTP_MSG_TUNNEL && HAS_REQ_DATA_FILTERS(s))
4436 chn->analysers |= AN_REQ_FLT_XFER_DATA;
4437 channel_auto_close(chn);
4438 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004439 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004440}
4441
4442
4443/* This function terminates the response because it was completly analyzed or
4444 * because an error was triggered during the body forwarding.
4445 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004446static void http_end_response(struct stream *s)
Christopher Fauletf2824e62018-10-01 12:12:37 +02004447{
4448 struct channel *chn = &s->res;
4449 struct http_txn *txn = s->txn;
4450
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004451 DBG_TRACE_ENTER(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004452
Christopher Fauletb42a8b62018-11-19 21:59:00 +01004453 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
4454 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004455 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004456 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004457 goto end;
4458 }
4459
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004460 if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE)) {
4461 DBG_TRACE_DEVEL("waiting end of the response", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004462 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004463 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004464
4465 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
4466 /* In theory, we don't need to read anymore, but we must
4467 * still monitor the server connection for a possible close
4468 * while the request is being uploaded, so we don't disable
4469 * reading.
4470 */
4471 /* channel_dont_read(chn); */
4472
4473 if (txn->req.msg_state < HTTP_MSG_DONE) {
4474 /* The client seems to still be sending data, probably
4475 * because we got an error response during an upload.
4476 * We have the choice of either breaking the connection
4477 * or letting it pass through. Let's do the later.
4478 */
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004479 DBG_TRACE_DEVEL("waiting end of the request", STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004480 return;
4481 }
4482
4483 /* When we get here, it means that both the request and the
4484 * response have finished receiving. Depending on the connection
4485 * mode, we'll have to wait for the last bytes to leave in either
4486 * direction, and sometimes for a close to be effective.
4487 */
Christopher Fauletc41547b2019-07-16 14:32:23 +02004488 if (txn->flags & TX_CON_WANT_TUN) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004489 channel_auto_read(chn);
4490 chn->flags |= CF_NEVER_WAIT;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004491 if (b_data(&chn->buf)) {
4492 DBG_TRACE_DEVEL("waiting to flush the respone", STRM_EV_HTTP_ANA, s, txn);
Christopher Faulet9768c262018-10-22 09:34:31 +02004493 return;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004494 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02004495 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
4496 }
4497 else {
4498 /* we're not expecting any new data to come for this
4499 * transaction, so we can close it.
4500 */
4501 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
4502 channel_shutr_now(chn);
4503 channel_shutw_now(chn);
4504 }
4505 }
4506 goto check_channel_flags;
4507 }
4508
4509 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
4510 http_msg_closing:
4511 /* nothing else to forward, just waiting for the output buffer
4512 * to be empty and for the shutw_now to take effect.
4513 */
4514 if (channel_is_empty(chn)) {
4515 txn->rsp.msg_state = HTTP_MSG_CLOSED;
4516 goto http_msg_closed;
4517 }
4518 else if (chn->flags & CF_SHUTW) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02004519 txn->rsp.msg_state = HTTP_MSG_ERROR;
Christopher Fauletcff0f732019-12-16 16:13:44 +01004520 _HA_ATOMIC_ADD(&strm_sess(s)->fe->fe_counters.cli_aborts, 1);
Olivier Houcharda798bf52019-03-08 18:52:00 +01004521 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletcff0f732019-12-16 16:13:44 +01004522 if (strm_sess(s)->listener->counters)
4523 _HA_ATOMIC_ADD(&strm_sess(s)->listener->counters->cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004524 if (objt_server(s->target))
Christopher Fauletcff0f732019-12-16 16:13:44 +01004525 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004526 goto end;
4527 }
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004528 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004529 return;
4530 }
4531
4532 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
4533 http_msg_closed:
4534 /* drop any pending data */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004535 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02004536 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004537 goto end;
4538 }
4539
4540 check_channel_flags:
4541 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
4542 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
4543 /* if we've just closed an output, let's switch */
4544 txn->rsp.msg_state = HTTP_MSG_CLOSING;
4545 goto http_msg_closing;
4546 }
4547
4548 end:
4549 chn->analysers &= AN_RES_FLT_END;
4550 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL && HAS_RSP_DATA_FILTERS(s))
4551 chn->analysers |= AN_RES_FLT_XFER_DATA;
4552 channel_auto_close(chn);
4553 channel_auto_read(chn);
Christopher Fauleteea8fc72019-11-05 16:18:10 +01004554 DBG_TRACE_LEAVE(STRM_EV_HTTP_ANA, s, txn);
Christopher Fauletf2824e62018-10-01 12:12:37 +02004555}
4556
Christopher Fauletef70e252020-01-28 09:26:19 +01004557/* Forward a response generated by HAProxy (error/redirect/return). This
4558 * function forwards all pending incoming data. If <final> is set to 0, nothing
4559 * more is performed. It is used for 1xx informational messages. Otherwise, the
4560 * transaction is terminated and the request is emptied. On success 1 is
4561 * returned. If an error occurred, 0 is returned.
4562 */
4563int http_forward_proxy_resp(struct stream *s, int final)
4564{
4565 struct channel *req = &s->req;
4566 struct channel *res = &s->res;
4567 struct htx *htx = htxbuf(&res->buf);
4568 size_t data;
4569
4570 if (final) {
4571 htx->flags |= HTX_FL_PROXY_RESP;
Christopher Faulet6d0c3df2020-01-22 09:26:35 +01004572 if (!http_eval_after_res_rules(s))
4573 return 0;
Christopher Fauletef70e252020-01-28 09:26:19 +01004574
4575 channel_auto_read(req);
4576 channel_abort(req);
4577 channel_auto_close(req);
4578 channel_htx_erase(req, htxbuf(&req->buf));
4579
4580 res->wex = tick_add_ifset(now_ms, res->wto);
4581 channel_auto_read(res);
4582 channel_auto_close(res);
4583 channel_shutr_now(res);
4584 }
4585
4586 data = htx->data - co_data(res);
4587 c_adv(res, data);
4588 htx->first = -1;
4589 res->total += data;
4590 return 1;
4591}
4592
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004593void http_server_error(struct stream *s, struct stream_interface *si, int err,
4594 int finst, const struct buffer *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004595{
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004596 http_reply_and_close(s, s->txn->status, msg);
Christopher Faulet0f226952018-10-22 09:29:56 +02004597 if (!(s->flags & SF_ERR_MASK))
4598 s->flags |= err;
4599 if (!(s->flags & SF_FINST_MASK))
4600 s->flags |= finst;
4601}
4602
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004603void http_reply_and_close(struct stream *s, short status, const struct buffer *msg)
Christopher Faulet0f226952018-10-22 09:29:56 +02004604{
4605 channel_auto_read(&s->req);
4606 channel_abort(&s->req);
4607 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004608 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
4609 channel_htx_truncate(&s->res, htxbuf(&s->res.buf));
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004610 channel_auto_read(&s->res);
4611 channel_auto_close(&s->res);
4612 channel_shutr_now(&s->res);
Christopher Faulet0f226952018-10-22 09:29:56 +02004613
Christopher Faulet72c7d8d2020-01-27 15:32:25 +01004614 s->res.wex = tick_add_ifset(now_ms, s->res.wto);
Christopher Faulet0f226952018-10-22 09:29:56 +02004615 s->txn->flags &= ~TX_WAIT_NEXT_RQ;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004616
4617 /* <msg> is an HTX structure. So we copy it in the response's
4618 * channel */
Christopher Faulet9f5839c2019-07-22 16:41:43 +02004619 if (msg && !b_is_null(msg)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02004620 struct channel *chn = &s->res;
4621 struct htx *htx;
4622
Christopher Fauletaed82cf2018-11-30 22:22:32 +01004623 FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg));
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004624 htx = htx_from_buf(&chn->buf);
Christopher Faulet637259e2020-01-23 11:57:31 +01004625 if (channel_htx_copy_msg(chn, htx, msg)) {
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004626 if (!http_forward_proxy_resp(s, 1) && s->txn->status != 500) {
4627 s->txn->status = 500;
4628 http_reply_and_close(s, s->txn->status, http_error_message(s));
4629 }
Christopher Faulet637259e2020-01-23 11:57:31 +01004630 }
Christopher Faulet0f226952018-10-22 09:29:56 +02004631 }
Christopher Faulet0f226952018-10-22 09:29:56 +02004632}
4633
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004634struct buffer *http_error_message(struct stream *s)
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004635{
4636 const int msgnum = http_get_status_idx(s->txn->status);
4637
Christopher Faulet53a87e12020-01-21 10:13:03 +01004638 if (s->txn->errmsg)
Christopher Faulet473e8802020-01-14 11:12:37 +01004639 return s->txn->errmsg;
4640 else if (s->be->errmsg[msgnum])
Christopher Faulet58857752020-01-15 15:19:50 +01004641 return s->be->errmsg[msgnum];
4642 else if (strm_fe(s)->errmsg[msgnum])
4643 return strm_fe(s)->errmsg[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004644 else
Christopher Fauletf7346382019-07-17 22:02:08 +02004645 return &http_err_chunks[msgnum];
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004646}
4647
Christopher Faulet304cc402019-07-15 15:46:28 +02004648/* Return the error message corresponding to si->err_type. It is assumed
4649 * that the server side is closed. Note that err_type is actually a
4650 * bitmask, where almost only aborts may be cumulated with other
4651 * values. We consider that aborted operations are more important
4652 * than timeouts or errors due to the fact that nobody else in the
4653 * logs might explain incomplete retries. All others should avoid
4654 * being cumulated. It should normally not be possible to have multiple
4655 * aborts at once, but just in case, the first one in sequence is reported.
4656 * Note that connection errors appearing on the second request of a keep-alive
4657 * connection are not reported since this allows the client to retry.
4658 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004659void http_return_srv_error(struct stream *s, struct stream_interface *si)
Christopher Faulet304cc402019-07-15 15:46:28 +02004660{
4661 int err_type = si->err_type;
4662
4663 /* set s->txn->status for http_error_message(s) */
4664 s->txn->status = 503;
4665
4666 if (err_type & SI_ET_QUEUE_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004667 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_Q,
4668 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004669 else if (err_type & SI_ET_CONN_ABRT)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004670 http_server_error(s, si, SF_ERR_CLICL, SF_FINST_C,
4671 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4672 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004673 else if (err_type & SI_ET_QUEUE_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004674 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_Q,
4675 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004676 else if (err_type & SI_ET_QUEUE_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004677 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_Q,
4678 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004679 else if (err_type & SI_ET_CONN_TO)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004680 http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_C,
4681 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4682 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004683 else if (err_type & SI_ET_CONN_ERR)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004684 http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_C,
4685 (s->flags & SF_SRV_REUSED) ? NULL :
4686 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004687 else if (err_type & SI_ET_CONN_RES)
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004688 http_server_error(s, si, SF_ERR_RESOURCE, SF_FINST_C,
4689 (s->txn->flags & TX_NOT_FIRST) ? NULL :
4690 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004691 else { /* SI_ET_CONN_OTHER and others */
4692 s->txn->status = 500;
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004693 http_server_error(s, si, SF_ERR_INTERNAL, SF_FINST_C,
4694 http_error_message(s));
Christopher Faulet304cc402019-07-15 15:46:28 +02004695 }
4696}
4697
Christopher Fauleta7b677c2018-11-29 16:48:49 +01004698
Christopher Faulet4a28a532019-03-01 11:19:40 +01004699/* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0
4700 * on success and -1 on error.
4701 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004702static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004703{
4704 /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
4705 * then we must send an HTTP/1.1 100 Continue intermediate response.
4706 */
4707 if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
4708 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
4709 struct ist hdr = { .ptr = "Expect", .len = 6 };
4710 struct http_hdr_ctx ctx;
4711
4712 ctx.blk = NULL;
4713 /* Expect is allowed in 1.1, look for it */
4714 if (http_find_header(htx, hdr, &ctx, 0) &&
4715 unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) {
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004716 if (http_reply_100_continue(s) == -1)
Christopher Faulet4a28a532019-03-01 11:19:40 +01004717 return -1;
4718 http_remove_header(htx, &ctx);
4719 }
4720 }
4721 return 0;
4722}
4723
Christopher Faulet23a3c792018-11-28 10:01:23 +01004724/* Send a 100-Continue response to the client. It returns 0 on success and -1
4725 * on error. The response channel is updated accordingly.
4726 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004727static int http_reply_100_continue(struct stream *s)
Christopher Faulet23a3c792018-11-28 10:01:23 +01004728{
4729 struct channel *res = &s->res;
4730 struct htx *htx = htx_from_buf(&res->buf);
4731 struct htx_sl *sl;
4732 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
4733 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004734
4735 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4736 ist("HTTP/1.1"), ist("100"), ist("Continue"));
4737 if (!sl)
4738 goto fail;
4739 sl->info.res.status = 100;
4740
Christopher Faulet1d5ec092019-06-26 14:23:54 +02004741 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet23a3c792018-11-28 10:01:23 +01004742 goto fail;
4743
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004744 if (!http_forward_proxy_resp(s, 0))
4745 goto fail;
Christopher Faulet23a3c792018-11-28 10:01:23 +01004746 return 0;
4747
4748 fail:
4749 /* If an error occurred, remove the incomplete HTTP response from the
4750 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004751 channel_htx_truncate(res, htx);
Christopher Faulet23a3c792018-11-28 10:01:23 +01004752 return -1;
4753}
4754
Christopher Faulet12c51e22018-11-28 15:59:42 +01004755
4756/* Send a 401-Unauthorized or 407-Unauthorized response to the client, depending
4757 * ont whether we use a proxy or not. It returns 0 on success and -1 on
4758 * error. The response channel is updated accordingly.
4759 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004760static int http_reply_40x_unauthorized(struct stream *s, const char *auth_realm)
Christopher Faulet12c51e22018-11-28 15:59:42 +01004761{
4762 struct channel *res = &s->res;
4763 struct htx *htx = htx_from_buf(&res->buf);
4764 struct htx_sl *sl;
4765 struct ist code, body;
4766 int status;
4767 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11);
Christopher Faulet12c51e22018-11-28 15:59:42 +01004768
4769 if (!(s->txn->flags & TX_USE_PX_CONN)) {
4770 status = 401;
4771 code = ist("401");
4772 body = ist("<html><body><h1>401 Unauthorized</h1>\n"
4773 "You need a valid user and password to access this content.\n"
4774 "</body></html>\n");
4775 }
4776 else {
4777 status = 407;
4778 code = ist("407");
4779 body = ist("<html><body><h1>407 Unauthorized</h1>\n"
4780 "You need a valid user and password to access this content.\n"
4781 "</body></html>\n");
4782 }
4783
4784 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
4785 ist("HTTP/1.1"), code, ist("Unauthorized"));
4786 if (!sl)
4787 goto fail;
4788 sl->info.res.status = status;
4789 s->txn->status = status;
4790
4791 if (chunk_printf(&trash, "Basic realm=\"%s\"", auth_realm) == -1)
4792 goto fail;
4793
Willy Tarreaub5ba2b02019-06-11 16:08:25 +02004794 if (!htx_add_header(htx, ist("Content-length"), ist("112")) ||
4795 !htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
Christopher Faulet12c51e22018-11-28 15:59:42 +01004796 !htx_add_header(htx, ist("Connection"), ist("close")) ||
Jérôme Magnin86cef232018-12-28 14:49:08 +01004797 !htx_add_header(htx, ist("Content-Type"), ist("text/html")))
4798 goto fail;
4799 if (status == 401 && !htx_add_header(htx, ist("WWW-Authenticate"), ist2(trash.area, trash.data)))
4800 goto fail;
4801 if (status == 407 && !htx_add_header(htx, ist("Proxy-Authenticate"), ist2(trash.area, trash.data)))
Christopher Faulet12c51e22018-11-28 15:59:42 +01004802 goto fail;
Willy Tarreau0a7ef022019-05-28 10:30:11 +02004803 if (!htx_add_endof(htx, HTX_BLK_EOH))
4804 goto fail;
4805
4806 while (body.len) {
4807 size_t sent = htx_add_data(htx, body);
4808 if (!sent)
4809 goto fail;
4810 body.ptr += sent;
4811 body.len -= sent;
4812 }
4813
4814 if (!htx_add_endof(htx, HTX_BLK_EOM))
Christopher Faulet12c51e22018-11-28 15:59:42 +01004815 goto fail;
4816
Christopher Fauleta72a7e42020-01-28 09:28:11 +01004817 if (!http_forward_proxy_resp(s, 1))
4818 goto fail;
Christopher Faulet12c51e22018-11-28 15:59:42 +01004819 return 0;
4820
4821 fail:
4822 /* If an error occurred, remove the incomplete HTTP response from the
4823 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01004824 channel_htx_truncate(res, htx);
Christopher Faulet12c51e22018-11-28 15:59:42 +01004825 return -1;
4826}
4827
Christopher Faulet0f226952018-10-22 09:29:56 +02004828/*
4829 * Capture headers from message <htx> according to header list <cap_hdr>, and
4830 * fill the <cap> pointers appropriately.
4831 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004832static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
Christopher Faulet0f226952018-10-22 09:29:56 +02004833{
4834 struct cap_hdr *h;
4835 int32_t pos;
4836
Christopher Fauleta3f15502019-05-13 15:27:23 +02004837 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02004838 struct htx_blk *blk = htx_get_blk(htx, pos);
4839 enum htx_blk_type type = htx_get_blk_type(blk);
4840 struct ist n, v;
4841
4842 if (type == HTX_BLK_EOH)
4843 break;
4844 if (type != HTX_BLK_HDR)
4845 continue;
4846
4847 n = htx_get_blk_name(htx, blk);
4848
4849 for (h = cap_hdr; h; h = h->next) {
4850 if (h->namelen && (h->namelen == n.len) &&
4851 (strncasecmp(n.ptr, h->name, h->namelen) == 0)) {
4852 if (cap[h->index] == NULL)
4853 cap[h->index] =
4854 pool_alloc(h->pool);
4855
4856 if (cap[h->index] == NULL) {
4857 ha_alert("HTTP capture : out of memory.\n");
4858 break;
4859 }
4860
4861 v = htx_get_blk_value(htx, blk);
4862 if (v.len > h->len)
4863 v.len = h->len;
4864
4865 memcpy(cap[h->index], v.ptr, v.len);
4866 cap[h->index][v.len]=0;
4867 }
4868 }
4869 }
4870}
4871
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02004872/* Delete a value in a header between delimiters <from> and <next>. The header
4873 * itself is delimited by <start> and <end> pointers. The number of characters
4874 * displaced is returned, and the pointer to the first delimiter is updated if
4875 * required. The function tries as much as possible to respect the following
4876 * principles :
4877 * - replace <from> delimiter by the <next> one unless <from> points to <start>,
4878 * in which case <next> is simply removed
4879 * - set exactly one space character after the new first delimiter, unless there
4880 * are not enough characters in the block being moved to do so.
4881 * - remove unneeded spaces before the previous delimiter and after the new
4882 * one.
4883 *
4884 * It is the caller's responsibility to ensure that :
4885 * - <from> points to a valid delimiter or <start> ;
4886 * - <next> points to a valid delimiter or <end> ;
4887 * - there are non-space chars before <from>.
4888 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004889static int http_del_hdr_value(char *start, char *end, char **from, char *next)
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02004890{
4891 char *prev = *from;
4892
4893 if (prev == start) {
4894 /* We're removing the first value. eat the semicolon, if <next>
4895 * is lower than <end> */
4896 if (next < end)
4897 next++;
4898
4899 while (next < end && HTTP_IS_SPHT(*next))
4900 next++;
4901 }
4902 else {
4903 /* Remove useless spaces before the old delimiter. */
4904 while (HTTP_IS_SPHT(*(prev-1)))
4905 prev--;
4906 *from = prev;
4907
4908 /* copy the delimiter and if possible a space if we're
4909 * not at the end of the line.
4910 */
4911 if (next < end) {
4912 *prev++ = *next++;
4913 if (prev + 1 < next)
4914 *prev++ = ' ';
4915 while (next < end && HTTP_IS_SPHT(*next))
4916 next++;
4917 }
4918 }
4919 memmove(prev, next, end - next);
4920 return (prev - next);
4921}
4922
Christopher Faulet0f226952018-10-22 09:29:56 +02004923
4924/* Formats the start line of the request (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08004925 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Faulet0f226952018-10-22 09:29:56 +02004926 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004927static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Faulet0f226952018-10-22 09:29:56 +02004928{
4929 struct ist dst = ist2(str, 0);
4930
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004931 if (istcat(&dst, htx_sl_req_meth(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02004932 goto end;
4933 if (dst.len + 1 > len)
4934 goto end;
4935 dst.ptr[dst.len++] = ' ';
4936
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004937 if (istcat(&dst, htx_sl_req_uri(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02004938 goto end;
4939 if (dst.len + 1 > len)
4940 goto end;
4941 dst.ptr[dst.len++] = ' ';
4942
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004943 istcat(&dst, htx_sl_req_vsn(sl), len);
Christopher Faulet0f226952018-10-22 09:29:56 +02004944 end:
4945 return dst.len;
4946}
4947
4948/*
4949 * Print a debug line with a start line.
4950 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004951static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl)
Christopher Faulet0f226952018-10-22 09:29:56 +02004952{
4953 struct session *sess = strm_sess(s);
4954 int max;
4955
4956 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
4957 dir,
4958 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
4959 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
4960
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004961 max = HTX_SL_P1_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02004962 UBOUND(max, trash.size - trash.data - 3);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004963 chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02004964 trash.area[trash.data++] = ' ';
4965
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004966 max = HTX_SL_P2_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02004967 UBOUND(max, trash.size - trash.data - 2);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004968 chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02004969 trash.area[trash.data++] = ' ';
4970
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004971 max = HTX_SL_P3_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02004972 UBOUND(max, trash.size - trash.data - 1);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004973 chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02004974 trash.area[trash.data++] = '\n';
4975
4976 shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
4977}
4978
4979/*
4980 * Print a debug line with a header.
4981 */
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02004982static 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 +02004983{
4984 struct session *sess = strm_sess(s);
4985 int max;
4986
4987 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
4988 dir,
4989 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
4990 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
4991
4992 max = n.len;
4993 UBOUND(max, trash.size - trash.data - 3);
4994 chunk_memcat(&trash, n.ptr, max);
4995 trash.area[trash.data++] = ':';
4996 trash.area[trash.data++] = ' ';
4997
4998 max = v.len;
4999 UBOUND(max, trash.size - trash.data - 1);
5000 chunk_memcat(&trash, v.ptr, max);
5001 trash.area[trash.data++] = '\n';
5002
5003 shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
5004}
5005
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005006/* Allocate a new HTTP transaction for stream <s> unless there is one already.
5007 * In case of allocation failure, everything allocated is freed and NULL is
5008 * returned. Otherwise the new transaction is assigned to the stream and
5009 * returned.
5010 */
5011struct http_txn *http_alloc_txn(struct stream *s)
5012{
5013 struct http_txn *txn = s->txn;
5014
5015 if (txn)
5016 return txn;
5017
5018 txn = pool_alloc(pool_head_http_txn);
5019 if (!txn)
5020 return txn;
5021
5022 s->txn = txn;
5023 return txn;
5024}
5025
5026void http_txn_reset_req(struct http_txn *txn)
5027{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005028 txn->req.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005029 txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
5030}
5031
5032void http_txn_reset_res(struct http_txn *txn)
5033{
Christopher Faulet1aea50e2020-01-17 16:03:53 +01005034 txn->rsp.flags = 0;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005035 txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
5036}
5037
5038/*
5039 * Initialize a new HTTP transaction for stream <s>. It is assumed that all
5040 * the required fields are properly allocated and that we only need to (re)init
5041 * them. This should be used before processing any new request.
5042 */
5043void http_init_txn(struct stream *s)
5044{
5045 struct http_txn *txn = s->txn;
5046 struct conn_stream *cs = objt_cs(s->si[0].end);
5047
5048 txn->flags = ((cs && cs->flags & CS_FL_NOT_FIRST)
5049 ? (TX_NOT_FIRST|TX_WAIT_NEXT_RQ)
5050 : 0);
5051 txn->status = -1;
Christopher Faulet473e8802020-01-14 11:12:37 +01005052 txn->errmsg = NULL;
Willy Tarreau8b507582020-02-25 09:35:07 +01005053 write_u32(txn->cache_hash, 0);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005054
5055 txn->cookie_first_date = 0;
5056 txn->cookie_last_date = 0;
5057
5058 txn->srv_cookie = NULL;
5059 txn->cli_cookie = NULL;
5060 txn->uri = NULL;
5061
5062 http_txn_reset_req(txn);
5063 http_txn_reset_res(txn);
5064
5065 txn->req.chn = &s->req;
5066 txn->rsp.chn = &s->res;
5067
5068 txn->auth.method = HTTP_AUTH_UNKNOWN;
5069
5070 vars_init(&s->vars_txn, SCOPE_TXN);
5071 vars_init(&s->vars_reqres, SCOPE_REQ);
5072}
5073
5074/* to be used at the end of a transaction */
5075void http_end_txn(struct stream *s)
5076{
5077 struct http_txn *txn = s->txn;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005078
5079 /* these ones will have been dynamically allocated */
5080 pool_free(pool_head_requri, txn->uri);
5081 pool_free(pool_head_capture, txn->cli_cookie);
5082 pool_free(pool_head_capture, txn->srv_cookie);
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005083 pool_free(pool_head_uniqueid, s->unique_id.ptr);
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005084
Tim Duesterhusa17e6622020-03-05 20:19:02 +01005085 s->unique_id = IST_NULL;
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005086 txn->uri = NULL;
5087 txn->srv_cookie = NULL;
5088 txn->cli_cookie = NULL;
5089
Christopher Faulet59399252019-11-07 14:27:52 +01005090 if (!LIST_ISEMPTY(&s->vars_txn.head))
5091 vars_prune(&s->vars_txn, s->sess, s);
5092 if (!LIST_ISEMPTY(&s->vars_reqres.head))
5093 vars_prune(&s->vars_reqres, s->sess, s);
5094}
5095
Christopher Fauleta8a46e22019-07-16 14:53:09 +02005096
5097DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn));
Christopher Faulet0f226952018-10-22 09:29:56 +02005098
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005099__attribute__((constructor))
Christopher Fauletfc9cfe42019-07-16 14:54:53 +02005100static void __http_protocol_init(void)
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005101{
5102}
5103
5104
5105/*
5106 * Local variables:
5107 * c-indent-level: 8
5108 * c-basic-offset: 8
5109 * End:
5110 */