blob: dbbd937bdf14bafea0270cfa2b7034d3552e9e06 [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>
Christopher Faulete0768eb2018-10-03 16:38:02 +020017#include <common/uri_auth.h>
18
Christopher Faulet0f226952018-10-22 09:29:56 +020019#include <types/capture.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020020
21#include <proto/acl.h>
Christopher Faulet3e964192018-10-24 11:39:23 +020022#include <proto/action.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020023#include <proto/channel.h>
24#include <proto/checks.h>
25#include <proto/connection.h>
26#include <proto/filters.h>
27#include <proto/hdr_idx.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 Faulet3e964192018-10-24 11:39:23 +020030#include <proto/pattern.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020031#include <proto/proto_http.h>
32#include <proto/proxy.h>
Christopher Fauletfefc73d2018-10-24 21:18:04 +020033#include <proto/server.h>
Christopher Faulete0768eb2018-10-03 16:38:02 +020034#include <proto/stream.h>
35#include <proto/stream_interface.h>
36#include <proto/stats.h>
37
Christopher Faulet377c5a52018-10-24 21:21:30 +020038extern const char *stat_status_codes[];
Christopher Fauletf2824e62018-10-01 12:12:37 +020039
40static void htx_end_request(struct stream *s);
41static void htx_end_response(struct stream *s);
42
Christopher Faulet0f226952018-10-22 09:29:56 +020043static void htx_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr);
Christopher Faulet0b6bdc52018-10-24 11:05:36 +020044static int htx_del_hdr_value(char *start, char *end, char **from, char *next);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +010045static size_t htx_fmt_req_line(const struct htx_sl *sl, char *str, size_t len);
46static size_t htx_fmt_res_line(const struct htx_sl *sl, char *str, size_t len);
47static void htx_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl);
Christopher Faulet0f226952018-10-22 09:29:56 +020048static void htx_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v);
49
Christopher Faulet3e964192018-10-24 11:39:23 +020050static enum rule_result htx_req_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s, int *deny_status);
51static enum rule_result htx_res_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s);
52
Christopher Faulet33640082018-10-24 11:53:01 +020053static int htx_apply_filters_to_request(struct stream *s, struct channel *req, struct proxy *px);
54static int htx_apply_filters_to_response(struct stream *s, struct channel *res, struct proxy *px);
55
Christopher Fauletfcda7c62018-10-24 11:56:22 +020056static void htx_manage_client_side_cookies(struct stream *s, struct channel *req);
57static void htx_manage_server_side_cookies(struct stream *s, struct channel *res);
58
Christopher Faulet377c5a52018-10-24 21:21:30 +020059static int htx_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend);
60static int htx_handle_stats(struct stream *s, struct channel *req);
61
Christopher Faulet4a28a532019-03-01 11:19:40 +010062static int htx_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg);
Christopher Faulet23a3c792018-11-28 10:01:23 +010063static int htx_reply_100_continue(struct stream *s);
Christopher Faulet12c51e22018-11-28 15:59:42 +010064static int htx_reply_40x_unauthorized(struct stream *s, const char *auth_realm);
Christopher Faulet23a3c792018-11-28 10:01:23 +010065
Christopher Faulete0768eb2018-10-03 16:38:02 +020066/* This stream analyser waits for a complete HTTP request. It returns 1 if the
67 * processing can continue on next analysers, or zero if it either needs more
68 * data or wants to immediately abort the request (eg: timeout, error, ...). It
69 * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req.analysers
70 * when it has nothing left to do, and may remove any analyser when it wants to
71 * abort.
72 */
73int htx_wait_for_request(struct stream *s, struct channel *req, int an_bit)
74{
Christopher Faulet9768c262018-10-22 09:34:31 +020075
Christopher Faulete0768eb2018-10-03 16:38:02 +020076 /*
Christopher Faulet9768c262018-10-22 09:34:31 +020077 * We will analyze a complete HTTP request to check the its syntax.
Christopher Faulete0768eb2018-10-03 16:38:02 +020078 *
Christopher Faulet9768c262018-10-22 09:34:31 +020079 * Once the start line and all headers are received, we may perform a
80 * capture of the error (if any), and we will set a few fields. We also
81 * check for monitor-uri, logging and finally headers capture.
Christopher Faulete0768eb2018-10-03 16:38:02 +020082 */
Christopher Faulete0768eb2018-10-03 16:38:02 +020083 struct session *sess = s->sess;
84 struct http_txn *txn = s->txn;
85 struct http_msg *msg = &txn->req;
Christopher Faulet9768c262018-10-22 09:34:31 +020086 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +010087 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +020088
89 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
90 now_ms, __FUNCTION__,
91 s,
92 req,
93 req->rex, req->wex,
94 req->flags,
95 ci_data(req),
96 req->analysers);
97
Christopher Faulet27ba2dc2018-12-05 11:53:24 +010098 htx = htxbuf(&req->buf);
Christopher Faulet9768c262018-10-22 09:34:31 +020099
Willy Tarreau4236f032019-03-05 10:43:32 +0100100 /* Parsing errors are caught here */
101 if (htx->flags & HTX_FL_PARSING_ERROR) {
102 stream_inc_http_req_ctr(s);
103 stream_inc_http_err_ctr(s);
104 proxy_inc_fe_req_ctr(sess->fe);
105 goto return_bad_req;
106 }
107
Christopher Faulete0768eb2018-10-03 16:38:02 +0200108 /* we're speaking HTTP here, so let's speak HTTP to the client */
109 s->srv_error = http_return_srv_error;
110
111 /* If there is data available for analysis, log the end of the idle time. */
Christopher Faulet870aad92018-11-29 15:23:46 +0100112 if (c_data(req) && s->logs.t_idle == -1) {
113 const struct cs_info *csinfo = si_get_cs_info(objt_cs(s->si[0].end));
114
115 s->logs.t_idle = ((csinfo)
116 ? csinfo->t_idle
117 : tv_ms_elapsed(&s->logs.tv_accept, &now) - s->logs.t_handshake);
118 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200119
Christopher Faulete0768eb2018-10-03 16:38:02 +0200120 /*
121 * Now we quickly check if we have found a full valid request.
122 * If not so, we check the FD and buffer states before leaving.
123 * A full request is indicated by the fact that we have seen
124 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
125 * requests are checked first. When waiting for a second request
126 * on a keep-alive stream, if we encounter and error, close, t/o,
127 * we note the error in the stream flags but don't set any state.
128 * Since the error will be noted there, it will not be counted by
129 * process_stream() as a frontend error.
130 * Last, we may increase some tracked counters' http request errors on
131 * the cases that are deliberately the client's fault. For instance,
132 * a timeout or connection reset is not counted as an error. However
133 * a bad request is.
134 */
Christopher Faulet9768c262018-10-22 09:34:31 +0200135 if (unlikely(htx_is_empty(htx) || htx_get_tail_type(htx) < HTX_BLK_EOH)) {
Christopher Faulet47365272018-10-31 17:40:50 +0100136 /*
Willy Tarreau4236f032019-03-05 10:43:32 +0100137 * First catch invalid request because only part of headers have
138 * been transfered. Multiplexers have the responsibility to emit
139 * all headers at once.
Christopher Faulet47365272018-10-31 17:40:50 +0100140 */
Willy Tarreau4236f032019-03-05 10:43:32 +0100141 if (htx_is_not_empty(htx) || (s->si[0].flags & SI_FL_RXBLK_ROOM)) {
Christopher Faulet47365272018-10-31 17:40:50 +0100142 stream_inc_http_req_ctr(s);
143 stream_inc_http_err_ctr(s);
144 proxy_inc_fe_req_ctr(sess->fe);
145 goto return_bad_req;
146 }
147
Christopher Faulet0ef372a2019-04-08 10:57:20 +0200148 if (htx->flags & HTX_FL_UPGRADE)
149 goto failed_keep_alive;
150
Christopher Faulet9768c262018-10-22 09:34:31 +0200151 /* 1: have we encountered a read error ? */
152 if (req->flags & CF_READ_ERROR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200153 if (!(s->flags & SF_ERR_MASK))
154 s->flags |= SF_ERR_CLICL;
155
156 if (txn->flags & TX_WAIT_NEXT_RQ)
157 goto failed_keep_alive;
158
159 if (sess->fe->options & PR_O_IGNORE_PRB)
160 goto failed_keep_alive;
161
Christopher Faulet9768c262018-10-22 09:34:31 +0200162 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200163 stream_inc_http_req_ctr(s);
164 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100165 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200166 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100167 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200168
Christopher Faulet9768c262018-10-22 09:34:31 +0200169 txn->status = 400;
170 msg->err_state = msg->msg_state;
171 msg->msg_state = HTTP_MSG_ERROR;
172 htx_reply_and_close(s, txn->status, NULL);
173 req->analysers &= AN_REQ_FLT_END;
174
Christopher Faulete0768eb2018-10-03 16:38:02 +0200175 if (!(s->flags & SF_FINST_MASK))
176 s->flags |= SF_FINST_R;
177 return 0;
178 }
179
Christopher Faulet9768c262018-10-22 09:34:31 +0200180 /* 2: has the read timeout expired ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200181 else if (req->flags & CF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
182 if (!(s->flags & SF_ERR_MASK))
183 s->flags |= SF_ERR_CLITO;
184
185 if (txn->flags & TX_WAIT_NEXT_RQ)
186 goto failed_keep_alive;
187
188 if (sess->fe->options & PR_O_IGNORE_PRB)
189 goto failed_keep_alive;
190
Christopher Faulet9768c262018-10-22 09:34:31 +0200191 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200192 stream_inc_http_req_ctr(s);
193 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100194 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200195 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100196 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200197
Christopher Faulet9768c262018-10-22 09:34:31 +0200198 txn->status = 408;
199 msg->err_state = msg->msg_state;
200 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100201 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200202 req->analysers &= AN_REQ_FLT_END;
203
Christopher Faulete0768eb2018-10-03 16:38:02 +0200204 if (!(s->flags & SF_FINST_MASK))
205 s->flags |= SF_FINST_R;
206 return 0;
207 }
208
Christopher Faulet9768c262018-10-22 09:34:31 +0200209 /* 3: have we encountered a close ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200210 else if (req->flags & CF_SHUTR) {
211 if (!(s->flags & SF_ERR_MASK))
212 s->flags |= SF_ERR_CLICL;
213
214 if (txn->flags & TX_WAIT_NEXT_RQ)
215 goto failed_keep_alive;
216
217 if (sess->fe->options & PR_O_IGNORE_PRB)
218 goto failed_keep_alive;
219
Christopher Faulete0768eb2018-10-03 16:38:02 +0200220 stream_inc_http_err_ctr(s);
221 stream_inc_http_req_ctr(s);
222 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100223 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200224 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100225 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200226
Christopher Faulet9768c262018-10-22 09:34:31 +0200227 txn->status = 400;
228 msg->err_state = msg->msg_state;
229 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100230 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200231 req->analysers &= AN_REQ_FLT_END;
232
Christopher Faulete0768eb2018-10-03 16:38:02 +0200233 if (!(s->flags & SF_FINST_MASK))
234 s->flags |= SF_FINST_R;
235 return 0;
236 }
237
238 channel_dont_connect(req);
239 req->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
240 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100241
Christopher Faulet9768c262018-10-22 09:34:31 +0200242 if (sess->listener->options & LI_O_NOQUICKACK && htx_is_not_empty(htx) &&
Christopher Faulete0768eb2018-10-03 16:38:02 +0200243 objt_conn(sess->origin) && conn_ctrl_ready(__objt_conn(sess->origin))) {
244 /* We need more data, we have to re-enable quick-ack in case we
245 * previously disabled it, otherwise we might cause the client
246 * to delay next data.
247 */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100248 conn_set_quickack(objt_conn(sess->origin), 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200249 }
Willy Tarreau1a18b542018-12-11 16:37:42 +0100250
Christopher Faulet47365272018-10-31 17:40:50 +0100251 if ((req->flags & CF_READ_PARTIAL) && (txn->flags & TX_WAIT_NEXT_RQ)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200252 /* If the client starts to talk, let's fall back to
253 * request timeout processing.
254 */
255 txn->flags &= ~TX_WAIT_NEXT_RQ;
256 req->analyse_exp = TICK_ETERNITY;
257 }
258
259 /* just set the request timeout once at the beginning of the request */
260 if (!tick_isset(req->analyse_exp)) {
Christopher Faulet47365272018-10-31 17:40:50 +0100261 if ((txn->flags & TX_WAIT_NEXT_RQ) && tick_isset(s->be->timeout.httpka))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200262 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
263 else
264 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
265 }
266
267 /* we're not ready yet */
268 return 0;
269
270 failed_keep_alive:
271 /* Here we process low-level errors for keep-alive requests. In
272 * short, if the request is not the first one and it experiences
273 * a timeout, read error or shutdown, we just silently close so
274 * that the client can try again.
275 */
276 txn->status = 0;
277 msg->msg_state = HTTP_MSG_RQBEFORE;
278 req->analysers &= AN_REQ_FLT_END;
279 s->logs.logwait = 0;
280 s->logs.level = 0;
281 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Faulet9768c262018-10-22 09:34:31 +0200282 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200283 return 0;
284 }
285
Christopher Faulet9768c262018-10-22 09:34:31 +0200286 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200287 stream_inc_http_req_ctr(s);
288 proxy_inc_fe_req_ctr(sess->fe); /* one more valid request for this FE */
289
Christopher Faulet9768c262018-10-22 09:34:31 +0200290 /* kill the pending keep-alive timeout */
291 txn->flags &= ~TX_WAIT_NEXT_RQ;
292 req->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200293
Christopher Faulet297fbb42019-05-13 14:41:27 +0200294 sl = http_get_stline(htx);
Christopher Faulet03599112018-11-27 11:21:21 +0100295
Christopher Faulet9768c262018-10-22 09:34:31 +0200296 /* 0: we might have to print this header in debug mode */
297 if (unlikely((global.mode & MODE_DEBUG) &&
298 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
299 int32_t pos;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200300
Christopher Faulet03599112018-11-27 11:21:21 +0100301 htx_debug_stline("clireq", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +0200302
Christopher Fauleta3f15502019-05-13 15:27:23 +0200303 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200304 struct htx_blk *blk = htx_get_blk(htx, pos);
305 enum htx_blk_type type = htx_get_blk_type(blk);
306
307 if (type == HTX_BLK_EOH)
308 break;
309 if (type != HTX_BLK_HDR)
310 continue;
311
312 htx_debug_hdr("clihdr", s,
313 htx_get_blk_name(htx, blk),
314 htx_get_blk_value(htx, blk));
315 }
316 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200317
318 /*
Christopher Faulet03599112018-11-27 11:21:21 +0100319 * 1: identify the method and the version. Also set HTTP flags
Christopher Faulete0768eb2018-10-03 16:38:02 +0200320 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100321 txn->meth = sl->info.req.meth;
Christopher Faulet03599112018-11-27 11:21:21 +0100322 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +0200323 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +0100324 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +0100325 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +0100326 if (sl->flags & HTX_SL_F_BODYLESS)
327 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200328
329 /* we can make use of server redirect on GET and HEAD */
330 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
331 s->flags |= SF_REDIRECTABLE;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100332 else if (txn->meth == HTTP_METH_OTHER && isteqi(htx_sl_req_meth(sl), ist("PRI"))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200333 /* PRI is reserved for the HTTP/2 preface */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200334 goto return_bad_req;
335 }
336
337 /*
338 * 2: check if the URI matches the monitor_uri.
339 * We have to do this for every request which gets in, because
340 * the monitor-uri is defined by the frontend.
341 */
342 if (unlikely((sess->fe->monitor_uri_len != 0) &&
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100343 isteqi(htx_sl_req_uri(sl), ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200344 /*
345 * We have found the monitor URI
346 */
347 struct acl_cond *cond;
348
349 s->flags |= SF_MONITOR;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100350 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200351
352 /* Check if we want to fail this monitor request or not */
353 list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) {
354 int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
355
356 ret = acl_pass(ret);
357 if (cond->pol == ACL_COND_UNLESS)
358 ret = !ret;
359
360 if (ret) {
361 /* we fail this request, let's return 503 service unavail */
362 txn->status = 503;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100363 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200364 if (!(s->flags & SF_ERR_MASK))
365 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
366 goto return_prx_cond;
367 }
368 }
369
Joseph Herlantc42c0e92018-11-25 10:43:27 -0800370 /* nothing to fail, let's reply normally */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200371 txn->status = 200;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100372 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200373 if (!(s->flags & SF_ERR_MASK))
374 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
375 goto return_prx_cond;
376 }
377
378 /*
379 * 3: Maybe we have to copy the original REQURI for the logs ?
380 * Note: we cannot log anymore if the request has been
381 * classified as invalid.
382 */
383 if (unlikely(s->logs.logwait & LW_REQ)) {
384 /* we have a complete HTTP request that we must log */
385 if ((txn->uri = pool_alloc(pool_head_requri)) != NULL) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200386 size_t len;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200387
Christopher Faulet9768c262018-10-22 09:34:31 +0200388 len = htx_fmt_req_line(sl, txn->uri, global.tune.requri_len - 1);
389 txn->uri[len] = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200390
391 if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT)))
392 s->do_log(s);
393 } else {
394 ha_alert("HTTP logging : out of memory.\n");
395 }
396 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200397
Christopher Faulete0768eb2018-10-03 16:38:02 +0200398 /* if the frontend has "option http-use-proxy-header", we'll check if
399 * we have what looks like a proxied connection instead of a connection,
400 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
401 * Note that this is *not* RFC-compliant, however browsers and proxies
402 * happen to do that despite being non-standard :-(
403 * We consider that a request not beginning with either '/' or '*' is
404 * a proxied connection, which covers both "scheme://location" and
405 * CONNECT ip:port.
406 */
407 if ((sess->fe->options2 & PR_O2_USE_PXHDR) &&
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100408 *HTX_SL_REQ_UPTR(sl) != '/' && *HTX_SL_REQ_UPTR(sl) != '*')
Christopher Faulete0768eb2018-10-03 16:38:02 +0200409 txn->flags |= TX_USE_PX_CONN;
410
Christopher Faulete0768eb2018-10-03 16:38:02 +0200411 /* 5: we may need to capture headers */
412 if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
Christopher Faulet9768c262018-10-22 09:34:31 +0200413 htx_capture_headers(htx, s->req_cap, sess->fe->req_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200414
Christopher Faulet03b9d8b2019-03-26 22:02:00 +0100415 /* by default, close the stream at the end of the transaction. */
416 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200417
418 /* we may have to wait for the request's body */
Christopher Faulet9768c262018-10-22 09:34:31 +0200419 if (s->be->options & PR_O_WREQ_BODY)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200420 req->analysers |= AN_REQ_HTTP_BODY;
421
422 /*
423 * RFC7234#4:
424 * A cache MUST write through requests with methods
425 * that are unsafe (Section 4.2.1 of [RFC7231]) to
426 * the origin server; i.e., a cache is not allowed
427 * to generate a reply to such a request before
428 * having forwarded the request and having received
429 * a corresponding response.
430 *
431 * RFC7231#4.2.1:
432 * Of the request methods defined by this
433 * specification, the GET, HEAD, OPTIONS, and TRACE
434 * methods are defined to be safe.
435 */
436 if (likely(txn->meth == HTTP_METH_GET ||
437 txn->meth == HTTP_METH_HEAD ||
438 txn->meth == HTTP_METH_OPTIONS ||
439 txn->meth == HTTP_METH_TRACE))
440 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
441
442 /* end of job, return OK */
443 req->analysers &= ~an_bit;
444 req->analyse_exp = TICK_ETERNITY;
Christopher Faulet9768c262018-10-22 09:34:31 +0200445
Christopher Faulete0768eb2018-10-03 16:38:02 +0200446 return 1;
447
448 return_bad_req:
Christopher Faulet9768c262018-10-22 09:34:31 +0200449 txn->status = 400;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200450 txn->req.err_state = txn->req.msg_state;
451 txn->req.msg_state = HTTP_MSG_ERROR;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100452 htx_reply_and_close(s, txn->status, htx_error_message(s));
Olivier Houcharda798bf52019-03-08 18:52:00 +0100453 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200454 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100455 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200456
457 return_prx_cond:
458 if (!(s->flags & SF_ERR_MASK))
459 s->flags |= SF_ERR_PRXCOND;
460 if (!(s->flags & SF_FINST_MASK))
461 s->flags |= SF_FINST_R;
462
463 req->analysers &= AN_REQ_FLT_END;
464 req->analyse_exp = TICK_ETERNITY;
465 return 0;
466}
467
468
469/* This stream analyser runs all HTTP request processing which is common to
470 * frontends and backends, which means blocking ACLs, filters, connection-close,
471 * reqadd, stats and redirects. This is performed for the designated proxy.
472 * It returns 1 if the processing can continue on next analysers, or zero if it
473 * either needs more data or wants to immediately abort the request (eg: deny,
474 * error, ...).
475 */
476int htx_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px)
477{
478 struct session *sess = s->sess;
479 struct http_txn *txn = s->txn;
480 struct http_msg *msg = &txn->req;
Christopher Fauletff2759f2018-10-24 11:13:16 +0200481 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200482 struct redirect_rule *rule;
483 struct cond_wordlist *wl;
484 enum rule_result verdict;
485 int deny_status = HTTP_ERR_403;
486 struct connection *conn = objt_conn(sess->origin);
487
488 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
489 /* we need more data */
490 goto return_prx_yield;
491 }
492
493 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
494 now_ms, __FUNCTION__,
495 s,
496 req,
497 req->rex, req->wex,
498 req->flags,
499 ci_data(req),
500 req->analysers);
501
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100502 htx = htxbuf(&req->buf);
Christopher Fauletff2759f2018-10-24 11:13:16 +0200503
Christopher Faulet1907ccc2019-04-29 13:12:02 +0200504 /* just in case we have some per-backend tracking. Only called the first
505 * execution of the analyser. */
506 if (!s->current_rule || s->current_rule_list != &px->http_req_rules)
507 stream_inc_be_http_req_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200508
509 /* evaluate http-request rules */
510 if (!LIST_ISEMPTY(&px->http_req_rules)) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200511 verdict = htx_req_get_intercept_rule(px, &px->http_req_rules, s, &deny_status);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200512
513 switch (verdict) {
514 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
515 goto return_prx_yield;
516
517 case HTTP_RULE_RES_CONT:
518 case HTTP_RULE_RES_STOP: /* nothing to do */
519 break;
520
521 case HTTP_RULE_RES_DENY: /* deny or tarpit */
522 if (txn->flags & TX_CLTARPIT)
523 goto tarpit;
524 goto deny;
525
526 case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */
527 goto return_prx_cond;
528
529 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
530 goto done;
531
532 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
533 goto return_bad_req;
534 }
535 }
536
537 if (conn && (conn->flags & CO_FL_EARLY_DATA) &&
538 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE))) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200539 struct http_hdr_ctx ctx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200540
Christopher Fauletff2759f2018-10-24 11:13:16 +0200541 ctx.blk = NULL;
542 if (!http_find_header(htx, ist("Early-Data"), &ctx, 0)) {
543 if (unlikely(!http_add_header(htx, ist("Early-Data"), ist("1"))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200544 goto return_bad_req;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200545 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200546 }
547
548 /* OK at this stage, we know that the request was accepted according to
549 * the http-request rules, we can check for the stats. Note that the
550 * URI is detected *before* the req* rules in order not to be affected
551 * by a possible reqrep, while they are processed *after* so that a
552 * reqdeny can still block them. This clearly needs to change in 1.6!
553 */
Christopher Fauletff2759f2018-10-24 11:13:16 +0200554 if (htx_stats_check_uri(s, txn, px)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200555 s->target = &http_stats_applet.obj_type;
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100556 if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200557 txn->status = 500;
558 s->logs.tv_request = now;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100559 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200560
561 if (!(s->flags & SF_ERR_MASK))
562 s->flags |= SF_ERR_RESOURCE;
563 goto return_prx_cond;
564 }
565
566 /* parse the whole stats request and extract the relevant information */
Christopher Fauletff2759f2018-10-24 11:13:16 +0200567 htx_handle_stats(s, req);
568 verdict = htx_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s, &deny_status);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200569 /* not all actions implemented: deny, allow, auth */
570
571 if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */
572 goto deny;
573
574 if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */
575 goto return_prx_cond;
576 }
577
578 /* evaluate the req* rules except reqadd */
579 if (px->req_exp != NULL) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200580 if (htx_apply_filters_to_request(s, req, px) < 0)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200581 goto return_bad_req;
582
583 if (txn->flags & TX_CLDENY)
584 goto deny;
585
586 if (txn->flags & TX_CLTARPIT) {
587 deny_status = HTTP_ERR_500;
588 goto tarpit;
589 }
590 }
591
592 /* add request headers from the rule sets in the same order */
593 list_for_each_entry(wl, &px->req_add, list) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200594 struct ist n,v;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200595 if (wl->cond) {
596 int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
597 ret = acl_pass(ret);
598 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
599 ret = !ret;
600 if (!ret)
601 continue;
602 }
603
Christopher Fauletff2759f2018-10-24 11:13:16 +0200604 http_parse_header(ist2(wl->s, strlen(wl->s)), &n, &v);
605 if (unlikely(!http_add_header(htx, n, v)))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200606 goto return_bad_req;
607 }
608
Christopher Faulet2571bc62019-03-01 11:44:26 +0100609 /* Proceed with the applets now. */
610 if (unlikely(objt_applet(s->target))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200611 if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
Olivier Houcharda798bf52019-03-08 18:52:00 +0100612 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200613
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100614 if (htx_handle_expect_hdr(s, htx, msg) == -1)
615 goto return_bad_req;
616
Christopher Faulete0768eb2018-10-03 16:38:02 +0200617 if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is
618 s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy
619 if (!(s->flags & SF_FINST_MASK))
620 s->flags |= SF_FINST_R;
621
622 /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */
623 req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END);
624 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
625 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100626
627 req->flags |= CF_SEND_DONTWAIT;
628 s->flags |= SF_ASSIGNED;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200629 goto done;
630 }
631
632 /* check whether we have some ACLs set to redirect this request */
633 list_for_each_entry(rule, &px->redirect_rules, list) {
634 if (rule->cond) {
635 int ret;
636
637 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
638 ret = acl_pass(ret);
639 if (rule->cond->pol == ACL_COND_UNLESS)
640 ret = !ret;
641 if (!ret)
642 continue;
643 }
Christopher Fauletf2824e62018-10-01 12:12:37 +0200644 if (!htx_apply_redirect_rule(rule, s, txn))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200645 goto return_bad_req;
646 goto done;
647 }
648
649 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
650 * If this happens, then the data will not come immediately, so we must
651 * send all what we have without waiting. Note that due to the small gain
652 * in waiting for the body of the request, it's easier to simply put the
653 * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
654 * itself once used.
655 */
656 req->flags |= CF_SEND_DONTWAIT;
657
658 done: /* done with this analyser, continue with next ones that the calling
659 * points will have set, if any.
660 */
661 req->analyse_exp = TICK_ETERNITY;
662 done_without_exp: /* done with this analyser, but dont reset the analyse_exp. */
663 req->analysers &= ~an_bit;
664 return 1;
665
666 tarpit:
667 /* Allow cookie logging
668 */
669 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletff2759f2018-10-24 11:13:16 +0200670 htx_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200671
672 /* When a connection is tarpitted, we use the tarpit timeout,
673 * which may be the same as the connect timeout if unspecified.
674 * If unset, then set it to zero because we really want it to
675 * eventually expire. We build the tarpit as an analyser.
676 */
Christopher Faulet202c6ce2019-01-07 14:57:35 +0100677 channel_htx_erase(&s->req, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200678
679 /* wipe the request out so that we can drop the connection early
680 * if the client closes first.
681 */
682 channel_dont_connect(req);
683
684 txn->status = http_err_codes[deny_status];
685
686 req->analysers &= AN_REQ_FLT_END; /* remove switching rules etc... */
687 req->analysers |= AN_REQ_HTTP_TARPIT;
688 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
689 if (!req->analyse_exp)
690 req->analyse_exp = tick_add(now_ms, 0);
691 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100692 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200693 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100694 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200695 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100696 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200697 goto done_without_exp;
698
699 deny: /* this request was blocked (denied) */
700
701 /* Allow cookie logging
702 */
703 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletff2759f2018-10-24 11:13:16 +0200704 htx_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200705
706 txn->flags |= TX_CLDENY;
707 txn->status = http_err_codes[deny_status];
708 s->logs.tv_request = now;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100709 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200710 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100711 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200712 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100713 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200714 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100715 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200716 goto return_prx_cond;
717
718 return_bad_req:
Christopher Faulete0768eb2018-10-03 16:38:02 +0200719 txn->req.err_state = txn->req.msg_state;
720 txn->req.msg_state = HTTP_MSG_ERROR;
721 txn->status = 400;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100722 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200723
Olivier Houcharda798bf52019-03-08 18:52:00 +0100724 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200725 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100726 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200727
728 return_prx_cond:
729 if (!(s->flags & SF_ERR_MASK))
730 s->flags |= SF_ERR_PRXCOND;
731 if (!(s->flags & SF_FINST_MASK))
732 s->flags |= SF_FINST_R;
733
734 req->analysers &= AN_REQ_FLT_END;
735 req->analyse_exp = TICK_ETERNITY;
736 return 0;
737
738 return_prx_yield:
739 channel_dont_connect(req);
740 return 0;
741}
742
743/* This function performs all the processing enabled for the current request.
744 * It returns 1 if the processing can continue on next analysers, or zero if it
745 * needs more data, encounters an error, or wants to immediately abort the
746 * request. It relies on buffers flags, and updates s->req.analysers.
747 */
748int htx_process_request(struct stream *s, struct channel *req, int an_bit)
749{
750 struct session *sess = s->sess;
751 struct http_txn *txn = s->txn;
752 struct http_msg *msg = &txn->req;
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200753 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200754 struct connection *cli_conn = objt_conn(strm_sess(s)->origin);
755
756 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
757 /* we need more data */
758 channel_dont_connect(req);
759 return 0;
760 }
761
762 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
763 now_ms, __FUNCTION__,
764 s,
765 req,
766 req->rex, req->wex,
767 req->flags,
768 ci_data(req),
769 req->analysers);
770
771 /*
772 * Right now, we know that we have processed the entire headers
773 * and that unwanted requests have been filtered out. We can do
774 * whatever we want with the remaining request. Also, now we
775 * may have separate values for ->fe, ->be.
776 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100777 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200778
779 /*
780 * If HTTP PROXY is set we simply get remote server address parsing
781 * incoming request. Note that this requires that a connection is
782 * allocated on the server side.
783 */
784 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
785 struct connection *conn;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100786 struct htx_sl *sl;
787 struct ist uri, path;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200788
789 /* Note that for now we don't reuse existing proxy connections */
790 if (unlikely((conn = cs_conn(si_alloc_cs(&s->si[1], NULL))) == NULL)) {
791 txn->req.err_state = txn->req.msg_state;
792 txn->req.msg_state = HTTP_MSG_ERROR;
793 txn->status = 500;
794 req->analysers &= AN_REQ_FLT_END;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100795 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200796
797 if (!(s->flags & SF_ERR_MASK))
798 s->flags |= SF_ERR_RESOURCE;
799 if (!(s->flags & SF_FINST_MASK))
800 s->flags |= SF_FINST_R;
801
802 return 0;
803 }
Christopher Faulet297fbb42019-05-13 14:41:27 +0200804 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100805 uri = htx_sl_req_uri(sl);
806 path = http_get_path(uri);
807 if (url2sa(uri.ptr, uri.len - path.len, &conn->addr.to, NULL) == -1)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200808 goto return_bad_req;
809
810 /* if the path was found, we have to remove everything between
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200811 * uri.ptr and path.ptr (excluded). If it was not found, we need
812 * to replace from all the uri by a single "/".
813 *
814 * Instead of rewritting the whole start line, we just update
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100815 * the star-line URI. Some space will be lost but it should be
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200816 * insignificant.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200817 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100818 istcpy(&uri, (path.len ? path : ist("/")), uri.len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200819 }
820
821 /*
822 * 7: Now we can work with the cookies.
823 * Note that doing so might move headers in the request, but
824 * the fields will stay coherent and the URI will not move.
825 * This should only be performed in the backend.
826 */
827 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletb6aadbd2018-12-18 16:41:31 +0100828 htx_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200829
830 /* add unique-id if "header-unique-id" is specified */
831
832 if (!LIST_ISEMPTY(&sess->fe->format_unique_id) && !s->unique_id) {
833 if ((s->unique_id = pool_alloc(pool_head_uniqueid)) == NULL)
834 goto return_bad_req;
835 s->unique_id[0] = '\0';
836 build_logline(s, s->unique_id, UNIQUEID_LEN, &sess->fe->format_unique_id);
837 }
838
839 if (sess->fe->header_unique_id && s->unique_id) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200840 struct ist n = ist2(sess->fe->header_unique_id, strlen(sess->fe->header_unique_id));
841 struct ist v = ist2(s->unique_id, strlen(s->unique_id));
842
843 if (unlikely(!http_add_header(htx, n, v)))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200844 goto return_bad_req;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200845 }
846
847 /*
848 * 9: add X-Forwarded-For if either the frontend or the backend
849 * asks for it.
850 */
851 if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200852 struct http_hdr_ctx ctx = { .blk = NULL };
853 struct ist hdr = ist2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name,
854 s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len);
855
Christopher Faulete0768eb2018-10-03 16:38:02 +0200856 if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200857 http_find_header(htx, hdr, &ctx, 0)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200858 /* The header is set to be added only if none is present
859 * and we found it, so don't do anything.
860 */
861 }
862 else if (cli_conn && cli_conn->addr.from.ss_family == AF_INET) {
863 /* Add an X-Forwarded-For header unless the source IP is
864 * in the 'except' network range.
865 */
866 if ((!sess->fe->except_mask.s_addr ||
867 (((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr & sess->fe->except_mask.s_addr)
868 != sess->fe->except_net.s_addr) &&
869 (!s->be->except_mask.s_addr ||
870 (((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr & s->be->except_mask.s_addr)
871 != s->be->except_net.s_addr)) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200872 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200873
874 /* Note: we rely on the backend to get the header name to be used for
875 * x-forwarded-for, because the header is really meant for the backends.
876 * However, if the backend did not specify any option, we have to rely
877 * on the frontend's header name.
878 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200879 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
880 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200881 goto return_bad_req;
882 }
883 }
884 else if (cli_conn && cli_conn->addr.from.ss_family == AF_INET6) {
885 /* FIXME: for the sake of completeness, we should also support
886 * 'except' here, although it is mostly useless in this case.
887 */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200888 char pn[INET6_ADDRSTRLEN];
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200889
Christopher Faulete0768eb2018-10-03 16:38:02 +0200890 inet_ntop(AF_INET6,
891 (const void *)&((struct sockaddr_in6 *)(&cli_conn->addr.from))->sin6_addr,
892 pn, sizeof(pn));
893
894 /* Note: we rely on the backend to get the header name to be used for
895 * x-forwarded-for, because the header is really meant for the backends.
896 * However, if the backend did not specify any option, we have to rely
897 * on the frontend's header name.
898 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200899 chunk_printf(&trash, "%s", pn);
900 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200901 goto return_bad_req;
902 }
903 }
904
905 /*
906 * 10: add X-Original-To if either the frontend or the backend
907 * asks for it.
908 */
909 if ((sess->fe->options | s->be->options) & PR_O_ORGTO) {
910
911 /* FIXME: don't know if IPv6 can handle that case too. */
912 if (cli_conn && cli_conn->addr.from.ss_family == AF_INET) {
913 /* Add an X-Original-To header unless the destination IP is
914 * in the 'except' network range.
915 */
916 conn_get_to_addr(cli_conn);
917
918 if (cli_conn->addr.to.ss_family == AF_INET &&
919 ((!sess->fe->except_mask_to.s_addr ||
920 (((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr & sess->fe->except_mask_to.s_addr)
921 != sess->fe->except_to.s_addr) &&
922 (!s->be->except_mask_to.s_addr ||
923 (((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
924 != s->be->except_to.s_addr))) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200925 struct ist hdr;
926 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200927
928 /* Note: we rely on the backend to get the header name to be used for
929 * x-original-to, because the header is really meant for the backends.
930 * However, if the backend did not specify any option, we have to rely
931 * on the frontend's header name.
932 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200933 if (s->be->orgto_hdr_len)
934 hdr = ist2(s->be->orgto_hdr_name, s->be->orgto_hdr_len);
935 else
936 hdr = ist2(sess->fe->orgto_hdr_name, sess->fe->orgto_hdr_len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200937
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200938 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
939 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200940 goto return_bad_req;
941 }
942 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200943 }
944
Christopher Faulete0768eb2018-10-03 16:38:02 +0200945 /* If we have no server assigned yet and we're balancing on url_param
946 * with a POST request, we may be interested in checking the body for
947 * that parameter. This will be done in another analyser.
948 */
949 if (!(s->flags & (SF_ASSIGNED|SF_DIRECT)) &&
Willy Tarreau089eaa02019-01-14 15:17:46 +0100950 s->txn->meth == HTTP_METH_POST &&
951 (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200952 channel_dont_connect(req);
953 req->analysers |= AN_REQ_HTTP_BODY;
954 }
955
956 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
957 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau1a18b542018-12-11 16:37:42 +0100958
Christopher Faulete0768eb2018-10-03 16:38:02 +0200959 /* We expect some data from the client. Unless we know for sure
960 * we already have a full request, we have to re-enable quick-ack
961 * in case we previously disabled it, otherwise we might cause
962 * the client to delay further data.
963 */
964 if ((sess->listener->options & LI_O_NOQUICKACK) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200965 (htx_get_tail_type(htx) != HTX_BLK_EOM))
Willy Tarreau1a18b542018-12-11 16:37:42 +0100966 conn_set_quickack(cli_conn, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200967
968 /*************************************************************
969 * OK, that's finished for the headers. We have done what we *
970 * could. Let's switch to the DATA state. *
971 ************************************************************/
972 req->analyse_exp = TICK_ETERNITY;
973 req->analysers &= ~an_bit;
974
975 s->logs.tv_request = now;
976 /* OK let's go on with the BODY now */
977 return 1;
978
979 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200980 txn->req.err_state = txn->req.msg_state;
981 txn->req.msg_state = HTTP_MSG_ERROR;
982 txn->status = 400;
983 req->analysers &= AN_REQ_FLT_END;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100984 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200985
Olivier Houcharda798bf52019-03-08 18:52:00 +0100986 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200987 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100988 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200989
990 if (!(s->flags & SF_ERR_MASK))
991 s->flags |= SF_ERR_PRXCOND;
992 if (!(s->flags & SF_FINST_MASK))
993 s->flags |= SF_FINST_R;
994 return 0;
995}
996
997/* This function is an analyser which processes the HTTP tarpit. It always
998 * returns zero, at the beginning because it prevents any other processing
999 * from occurring, and at the end because it terminates the request.
1000 */
1001int htx_process_tarpit(struct stream *s, struct channel *req, int an_bit)
1002{
1003 struct http_txn *txn = s->txn;
1004
1005 /* This connection is being tarpitted. The CLIENT side has
1006 * already set the connect expiration date to the right
1007 * timeout. We just have to check that the client is still
1008 * there and that the timeout has not expired.
1009 */
1010 channel_dont_connect(req);
1011 if ((req->flags & (CF_SHUTR|CF_READ_ERROR)) == 0 &&
1012 !tick_is_expired(req->analyse_exp, now_ms))
1013 return 0;
1014
1015 /* We will set the queue timer to the time spent, just for
1016 * logging purposes. We fake a 500 server error, so that the
1017 * attacker will not suspect his connection has been tarpitted.
1018 * It will not cause trouble to the logs because we can exclude
1019 * the tarpitted connections by filtering on the 'PT' status flags.
1020 */
1021 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1022
1023 if (!(req->flags & CF_READ_ERROR))
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001024 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001025
1026 req->analysers &= AN_REQ_FLT_END;
1027 req->analyse_exp = TICK_ETERNITY;
1028
1029 if (!(s->flags & SF_ERR_MASK))
1030 s->flags |= SF_ERR_PRXCOND;
1031 if (!(s->flags & SF_FINST_MASK))
1032 s->flags |= SF_FINST_T;
1033 return 0;
1034}
1035
1036/* This function is an analyser which waits for the HTTP request body. It waits
1037 * for either the buffer to be full, or the full advertised contents to have
1038 * reached the buffer. It must only be called after the standard HTTP request
1039 * processing has occurred, because it expects the request to be parsed and will
1040 * look for the Expect header. It may send a 100-Continue interim response. It
1041 * takes in input any state starting from HTTP_MSG_BODY and leaves with one of
1042 * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it
1043 * needs to read more data, or 1 once it has completed its analysis.
1044 */
1045int htx_wait_for_request_body(struct stream *s, struct channel *req, int an_bit)
1046{
1047 struct session *sess = s->sess;
1048 struct http_txn *txn = s->txn;
1049 struct http_msg *msg = &s->txn->req;
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001050 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001051
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001052
1053 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1054 now_ms, __FUNCTION__,
1055 s,
1056 req,
1057 req->rex, req->wex,
1058 req->flags,
1059 ci_data(req),
1060 req->analysers);
1061
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001062 htx = htxbuf(&req->buf);
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001063
Willy Tarreau4236f032019-03-05 10:43:32 +01001064 if (htx->flags & HTX_FL_PARSING_ERROR)
1065 goto return_bad_req;
1066
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001067 if (msg->msg_state < HTTP_MSG_BODY)
1068 goto missing_data;
Christopher Faulet9768c262018-10-22 09:34:31 +02001069
Christopher Faulete0768eb2018-10-03 16:38:02 +02001070 /* We have to parse the HTTP request body to find any required data.
1071 * "balance url_param check_post" should have been the only way to get
1072 * into this. We were brought here after HTTP header analysis, so all
1073 * related structures are ready.
1074 */
1075
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001076 if (msg->msg_state < HTTP_MSG_DATA) {
Christopher Faulet4a28a532019-03-01 11:19:40 +01001077 if (htx_handle_expect_hdr(s, htx, msg) == -1)
1078 goto return_bad_req;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001079 }
1080
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001081 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001082
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001083 /* Now we're in HTTP_MSG_DATA. We just need to know if all data have
1084 * been received or if the buffer is full.
Christopher Faulete0768eb2018-10-03 16:38:02 +02001085 */
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001086 if (htx_get_tail_type(htx) >= HTX_BLK_EOD ||
Christopher Fauletdcd8c5e2019-01-21 11:24:38 +01001087 channel_htx_full(req, htx, global.tune.maxrewrite))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001088 goto http_end;
1089
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001090 missing_data:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001091 if ((req->flags & CF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
1092 txn->status = 408;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001093 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001094
1095 if (!(s->flags & SF_ERR_MASK))
1096 s->flags |= SF_ERR_CLITO;
1097 if (!(s->flags & SF_FINST_MASK))
1098 s->flags |= SF_FINST_D;
1099 goto return_err_msg;
1100 }
1101
1102 /* we get here if we need to wait for more data */
1103 if (!(req->flags & (CF_SHUTR | CF_READ_ERROR))) {
1104 /* Not enough data. We'll re-use the http-request
1105 * timeout here. Ideally, we should set the timeout
1106 * relative to the accept() date. We just set the
1107 * request timeout once at the beginning of the
1108 * request.
1109 */
1110 channel_dont_connect(req);
1111 if (!tick_isset(req->analyse_exp))
1112 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
1113 return 0;
1114 }
1115
1116 http_end:
1117 /* The situation will not evolve, so let's give up on the analysis. */
1118 s->logs.tv_request = now; /* update the request timer to reflect full request */
1119 req->analysers &= ~an_bit;
1120 req->analyse_exp = TICK_ETERNITY;
1121 return 1;
1122
1123 return_bad_req: /* let's centralize all bad requests */
1124 txn->req.err_state = txn->req.msg_state;
1125 txn->req.msg_state = HTTP_MSG_ERROR;
1126 txn->status = 400;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001127 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001128
1129 if (!(s->flags & SF_ERR_MASK))
1130 s->flags |= SF_ERR_PRXCOND;
1131 if (!(s->flags & SF_FINST_MASK))
1132 s->flags |= SF_FINST_R;
1133
1134 return_err_msg:
1135 req->analysers &= AN_REQ_FLT_END;
Olivier Houcharda798bf52019-03-08 18:52:00 +01001136 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001137 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001138 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001139 return 0;
1140}
1141
1142/* This function is an analyser which forwards request body (including chunk
1143 * sizes if any). It is called as soon as we must forward, even if we forward
1144 * zero byte. The only situation where it must not be called is when we're in
1145 * tunnel mode and we want to forward till the close. It's used both to forward
1146 * remaining data and to resync after end of body. It expects the msg_state to
1147 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
1148 * read more data, or 1 once we can go on with next request or end the stream.
1149 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
1150 * bytes of pending data + the headers if not already done.
1151 */
1152int htx_request_forward_body(struct stream *s, struct channel *req, int an_bit)
1153{
1154 struct session *sess = s->sess;
1155 struct http_txn *txn = s->txn;
Christopher Faulet9768c262018-10-22 09:34:31 +02001156 struct http_msg *msg = &txn->req;
1157 struct htx *htx;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001158 short status = 0;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001159 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001160
1161 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1162 now_ms, __FUNCTION__,
1163 s,
1164 req,
1165 req->rex, req->wex,
1166 req->flags,
1167 ci_data(req),
1168 req->analysers);
1169
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001170 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001171
1172 if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
1173 ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) {
1174 /* Output closed while we were sending data. We must abort and
1175 * wake the other side up.
1176 */
1177 msg->err_state = msg->msg_state;
1178 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001179 htx_end_request(s);
1180 htx_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001181 return 1;
1182 }
1183
1184 /* Note that we don't have to send 100-continue back because we don't
1185 * need the data to complete our job, and it's up to the server to
1186 * decide whether to return 100, 417 or anything else in return of
1187 * an "Expect: 100-continue" header.
1188 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001189 if (msg->msg_state == HTTP_MSG_BODY)
1190 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001191
1192 /* Some post-connect processing might want us to refrain from starting to
1193 * forward data. Currently, the only reason for this is "balance url_param"
1194 * whichs need to parse/process the request after we've enabled forwarding.
1195 */
1196 if (unlikely(msg->flags & HTTP_MSGF_WAIT_CONN)) {
1197 if (!(s->res.flags & CF_READ_ATTACHED)) {
1198 channel_auto_connect(req);
1199 req->flags |= CF_WAKE_CONNECT;
1200 channel_dont_close(req); /* don't fail on early shutr */
1201 goto waiting;
1202 }
1203 msg->flags &= ~HTTP_MSGF_WAIT_CONN;
1204 }
1205
1206 /* in most states, we should abort in case of early close */
1207 channel_auto_close(req);
1208
1209 if (req->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01001210 if (req->to_forward == CHN_INFINITE_FORWARD) {
1211 if (req->flags & (CF_SHUTR|CF_EOI)) {
1212 msg->msg_state = HTTP_MSG_DONE;
1213 req->to_forward = 0;
1214 goto done;
1215 }
1216 }
1217 else {
1218 /* We can't process the buffer's contents yet */
1219 req->flags |= CF_WAKE_WRITE;
1220 goto missing_data_or_waiting;
1221 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001222 }
1223
Christopher Faulet9768c262018-10-22 09:34:31 +02001224 if (msg->msg_state >= HTTP_MSG_DONE)
1225 goto done;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001226 /* Forward input data. We get it by removing all outgoing data not
1227 * forwarded yet from HTX data size. If there are some data filters, we
1228 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02001229 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001230 if (HAS_REQ_DATA_FILTERS(s)) {
1231 ret = flt_http_payload(s, msg, htx->data);
1232 if (ret < 0)
1233 goto return_bad_req;
1234 c_adv(req, ret);
1235 if (htx->data != co_data(req) || htx->extra)
1236 goto missing_data_or_waiting;
1237 }
1238 else {
1239 c_adv(req, htx->data - co_data(req));
Christopher Faulet66af0b22019-03-22 14:54:52 +01001240 if (msg->flags & HTTP_MSGF_XFER_LEN)
1241 channel_htx_forward_forever(req, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001242 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001243
Christopher Fauletc62c2b92019-03-28 11:41:39 +01001244 if (txn->meth == HTTP_METH_CONNECT) {
1245 msg->msg_state = HTTP_MSG_TUNNEL;
1246 goto done;
1247 }
1248
Christopher Faulet9768c262018-10-22 09:34:31 +02001249 /* Check if the end-of-message is reached and if so, switch the message
1250 * in HTTP_MSG_DONE state.
1251 */
1252 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
1253 goto missing_data_or_waiting;
1254
1255 msg->msg_state = HTTP_MSG_DONE;
Christopher Fauletaed68d42019-03-28 18:12:46 +01001256 req->to_forward = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001257
1258 done:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001259 /* other states, DONE...TUNNEL */
1260 /* we don't want to forward closes on DONE except in tunnel mode. */
1261 if ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
1262 channel_dont_close(req);
1263
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001264 if (HAS_REQ_DATA_FILTERS(s)) {
1265 ret = flt_http_end(s, msg);
1266 if (ret <= 0) {
1267 if (!ret)
1268 goto missing_data_or_waiting;
1269 goto return_bad_req;
1270 }
1271 }
1272
Christopher Fauletf2824e62018-10-01 12:12:37 +02001273 htx_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001274 if (!(req->analysers & an_bit)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02001275 htx_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001276 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
1277 if (req->flags & CF_SHUTW) {
1278 /* request errors are most likely due to the
1279 * server aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01001280 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001281 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001282 goto return_bad_req;
1283 }
1284 return 1;
1285 }
1286
1287 /* If "option abortonclose" is set on the backend, we want to monitor
1288 * the client's connection and forward any shutdown notification to the
1289 * server, which will decide whether to close or to go on processing the
1290 * request. We only do that in tunnel mode, and not in other modes since
1291 * it can be abused to exhaust source ports. */
Christopher Faulet769d0e92019-03-22 14:23:18 +01001292 if (s->be->options & PR_O_ABRT_CLOSE) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001293 channel_auto_read(req);
1294 if ((req->flags & (CF_SHUTR|CF_READ_NULL)) &&
1295 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN))
1296 s->si[1].flags |= SI_FL_NOLINGER;
1297 channel_auto_close(req);
1298 }
1299 else if (s->txn->meth == HTTP_METH_POST) {
1300 /* POST requests may require to read extra CRLF sent by broken
1301 * browsers and which could cause an RST to be sent upon close
1302 * on some systems (eg: Linux). */
1303 channel_auto_read(req);
1304 }
1305 return 0;
1306
1307 missing_data_or_waiting:
1308 /* stop waiting for data if the input is closed before the end */
Christopher Faulet93e02d82019-03-08 14:18:50 +01001309 if (msg->msg_state < HTTP_MSG_DONE && req->flags & CF_SHUTR)
1310 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
Christopher Faulet47365272018-10-31 17:40:50 +01001317 if (htx->flags & HTX_FL_PARSING_ERROR)
1318 goto return_bad_req;
Christopher Faulet9768c262018-10-22 09:34:31 +02001319
Christopher Faulete0768eb2018-10-03 16:38:02 +02001320 /* When TE: chunked is used, we need to get there again to parse remaining
1321 * chunks even if the client has closed, so we don't want to set CF_DONTCLOSE.
1322 * And when content-length is used, we never want to let the possible
1323 * shutdown be forwarded to the other side, as the state machine will
1324 * take care of it once the client responds. It's also important to
1325 * prevent TIME_WAITs from accumulating on the backend side, and for
1326 * HTTP/2 where the last frame comes with a shutdown.
1327 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001328 if (msg->flags & HTTP_MSGF_XFER_LEN)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001329 channel_dont_close(req);
1330
1331 /* We know that more data are expected, but we couldn't send more that
1332 * what we did. So we always set the CF_EXPECT_MORE flag so that the
1333 * system knows it must not set a PUSH on this first part. Interactive
1334 * modes are already handled by the stream sock layer. We must not do
1335 * this in content-length mode because it could present the MSG_MORE
1336 * flag with the last block of forwarded data, which would cause an
1337 * additional delay to be observed by the receiver.
1338 */
1339 if (msg->flags & HTTP_MSGF_TE_CHNK)
1340 req->flags |= CF_EXPECT_MORE;
1341
1342 return 0;
1343
Christopher Faulet93e02d82019-03-08 14:18:50 +01001344 return_cli_abort:
1345 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1346 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
1347 if (objt_server(s->target))
1348 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
1349 if (!(s->flags & SF_ERR_MASK))
1350 s->flags |= SF_ERR_CLICL;
1351 status = 400;
1352 goto return_error;
1353
1354 return_srv_abort:
1355 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
1356 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
1357 if (objt_server(s->target))
1358 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1);
1359 if (!(s->flags & SF_ERR_MASK))
1360 s->flags |= SF_ERR_SRVCL;
1361 status = 502;
1362 goto return_error;
1363
1364 return_bad_req:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001365 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001366 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001367 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001368 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01001369 s->flags |= SF_ERR_CLICL;
1370 status = 400;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001371
Christopher Faulet93e02d82019-03-08 14:18:50 +01001372 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001373 txn->req.err_state = txn->req.msg_state;
1374 txn->req.msg_state = HTTP_MSG_ERROR;
Christopher Faulet9768c262018-10-22 09:34:31 +02001375 if (txn->status > 0) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001376 /* Note: we don't send any error if some data were already sent */
Christopher Faulet9768c262018-10-22 09:34:31 +02001377 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001378 } else {
Christopher Faulet93e02d82019-03-08 14:18:50 +01001379 txn->status = status;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001380 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001381 }
1382 req->analysers &= AN_REQ_FLT_END;
1383 s->res.analysers &= AN_RES_FLT_END; /* we're in data phase, we want to abort both directions */
Christopher Faulet93e02d82019-03-08 14:18:50 +01001384 if (!(s->flags & SF_FINST_MASK))
1385 s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001386 return 0;
1387}
1388
Olivier Houcharda254a372019-04-05 15:30:12 +02001389/* Reset the stream and the backend stream_interface to a situation suitable for attemption connection */
1390/* Returns 0 if we can attempt to retry, -1 otherwise */
1391static __inline int do_l7_retry(struct stream *s, struct stream_interface *si)
1392{
1393 struct channel *req, *res;
1394 int co_data;
1395
1396 si->conn_retries--;
1397 if (si->conn_retries < 0)
1398 return -1;
1399
Willy Tarreau223995e2019-05-04 10:38:31 +02001400 if (objt_server(s->target))
1401 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.retries, 1);
1402 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
1403
Olivier Houcharda254a372019-04-05 15:30:12 +02001404 req = &s->req;
1405 res = &s->res;
1406 /* Remove any write error from the request, and read error from the response */
1407 req->flags &= ~(CF_WRITE_ERROR | CF_WRITE_TIMEOUT | CF_SHUTW | CF_SHUTW_NOW);
1408 res->flags &= ~(CF_READ_ERROR | CF_READ_TIMEOUT | CF_SHUTR | CF_EOI | CF_READ_NULL | CF_SHUTR_NOW);
1409 res->analysers = 0;
1410 si->flags &= ~(SI_FL_ERR | SI_FL_EXP | SI_FL_RXBLK_SHUT);
1411 si->state = SI_ST_REQ;
1412 si->exp = TICK_ETERNITY;
1413 res->rex = TICK_ETERNITY;
1414 res->to_forward = 0;
1415 res->analyse_exp = TICK_ETERNITY;
1416 res->total = 0;
1417 s->flags &= ~(SF_ASSIGNED | SF_ADDR_SET | SF_ERR_SRVTO | SF_ERR_SRVCL);
1418 si_release_endpoint(&s->si[1]);
1419 b_free(&req->buf);
1420 /* Swap the L7 buffer with the channel buffer */
1421 /* We know we stored the co_data as b_data, so get it there */
1422 co_data = b_data(&si->l7_buffer);
1423 b_set_data(&si->l7_buffer, b_size(&si->l7_buffer));
1424 b_xfer(&req->buf, &si->l7_buffer, b_data(&si->l7_buffer));
1425
1426 co_set_data(req, co_data);
1427 b_reset(&res->buf);
1428 co_set_data(res, 0);
1429 return 0;
1430}
1431
Christopher Faulete0768eb2018-10-03 16:38:02 +02001432/* This stream analyser waits for a complete HTTP response. It returns 1 if the
1433 * processing can continue on next analysers, or zero if it either needs more
1434 * data or wants to immediately abort the response (eg: timeout, error, ...). It
1435 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
1436 * when it has nothing left to do, and may remove any analyser when it wants to
1437 * abort.
1438 */
1439int htx_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
1440{
Christopher Faulet9768c262018-10-22 09:34:31 +02001441 /*
1442 * We will analyze a complete HTTP response to check the its syntax.
1443 *
1444 * Once the start line and all headers are received, we may perform a
1445 * capture of the error (if any), and we will set a few fields. We also
1446 * logging and finally headers capture.
1447 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001448 struct session *sess = s->sess;
1449 struct http_txn *txn = s->txn;
1450 struct http_msg *msg = &txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02001451 struct htx *htx;
Olivier Houcharda254a372019-04-05 15:30:12 +02001452 struct stream_interface *si_b = &s->si[1];
Christopher Faulet61608322018-11-23 16:23:45 +01001453 struct connection *srv_conn;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001454 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001455 int n;
1456
1457 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1458 now_ms, __FUNCTION__,
1459 s,
1460 rep,
1461 rep->rex, rep->wex,
1462 rep->flags,
1463 ci_data(rep),
1464 rep->analysers);
1465
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001466 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001467
Willy Tarreau4236f032019-03-05 10:43:32 +01001468 /* Parsing errors are caught here */
1469 if (htx->flags & HTX_FL_PARSING_ERROR)
1470 goto return_bad_res;
1471
Christopher Faulete0768eb2018-10-03 16:38:02 +02001472 /*
1473 * Now we quickly check if we have found a full valid response.
1474 * If not so, we check the FD and buffer states before leaving.
1475 * A full response is indicated by the fact that we have seen
1476 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
1477 * responses are checked first.
1478 *
1479 * Depending on whether the client is still there or not, we
1480 * may send an error response back or not. Note that normally
1481 * we should only check for HTTP status there, and check I/O
1482 * errors somewhere else.
1483 */
Christopher Faulet72b62732018-11-28 16:44:44 +01001484 if (unlikely(co_data(rep) || htx_is_empty(htx) || htx_get_tail_type(htx) < HTX_BLK_EOH)) {
Christopher Faulet47365272018-10-31 17:40:50 +01001485 /*
Christopher Fauletdcd8c5e2019-01-21 11:24:38 +01001486 * First catch invalid response because of a parsing error or
1487 * because only part of headers have been transfered.
1488 * Multiplexers have the responsibility to emit all headers at
1489 * once. We must be sure to have forwarded all outgoing data
1490 * first.
Christopher Faulet47365272018-10-31 17:40:50 +01001491 */
Willy Tarreau4236f032019-03-05 10:43:32 +01001492 if (!co_data(rep) && (htx_is_not_empty(htx) || (s->si[1].flags & SI_FL_RXBLK_ROOM)))
Christopher Faulet47365272018-10-31 17:40:50 +01001493 goto return_bad_res;
1494
Christopher Faulet9768c262018-10-22 09:34:31 +02001495 /* 1: have we encountered a read error ? */
1496 if (rep->flags & CF_READ_ERROR) {
Olivier Houchard865d8392019-05-03 22:46:27 +02001497 struct connection *conn = NULL;
1498
Olivier Houchard865d8392019-05-03 22:46:27 +02001499 if (objt_cs(s->si[1].end))
1500 conn = objt_cs(s->si[1].end)->conn;
1501
1502 if (si_b->flags & SI_FL_L7_RETRY &&
1503 (!conn || conn->err_code != CO_ER_SSL_EARLY_FAILED)) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001504 /* If we arrive here, then CF_READ_ERROR was
1505 * set by si_cs_recv() because we matched a
1506 * status, overwise it would have removed
1507 * the SI_FL_L7_RETRY flag, so it's ok not
1508 * to check s->be->retry_type.
1509 */
1510 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1511 return 0;
1512 }
1513
Olivier Houchard6db16992019-05-17 15:40:49 +02001514 if (txn->flags & TX_NOT_FIRST)
1515 goto abort_keep_alive;
1516
Olivier Houcharda798bf52019-03-08 18:52:00 +01001517 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001518 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001519 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001520 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001521 }
1522
Christopher Faulete0768eb2018-10-03 16:38:02 +02001523 rep->analysers &= AN_RES_FLT_END;
1524 txn->status = 502;
1525
1526 /* Check to see if the server refused the early data.
1527 * If so, just send a 425
1528 */
Olivier Houchard865d8392019-05-03 22:46:27 +02001529 if (conn->err_code == CO_ER_SSL_EARLY_FAILED) {
1530 if ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001531 (si_b->flags & SI_FL_L7_RETRY) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001532 do_l7_retry(s, si_b) == 0)
1533 return 0;
1534 txn->status = 425;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001535 }
1536
1537 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001538 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001539
1540 if (!(s->flags & SF_ERR_MASK))
1541 s->flags |= SF_ERR_SRVCL;
1542 if (!(s->flags & SF_FINST_MASK))
1543 s->flags |= SF_FINST_H;
1544 return 0;
1545 }
1546
Christopher Faulet9768c262018-10-22 09:34:31 +02001547 /* 2: read timeout : return a 504 to the client. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001548 else if (rep->flags & CF_READ_TIMEOUT) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001549 if ((si_b->flags & SI_FL_L7_RETRY) &&
1550 (s->be->retry_type & PR_RE_TIMEOUT)) {
1551 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1552 return 0;
1553 }
Olivier Houcharda798bf52019-03-08 18:52:00 +01001554 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001555 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001556 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001557 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001558 }
1559
Christopher Faulete0768eb2018-10-03 16:38:02 +02001560 rep->analysers &= AN_RES_FLT_END;
1561 txn->status = 504;
1562 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001563 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001564
1565 if (!(s->flags & SF_ERR_MASK))
1566 s->flags |= SF_ERR_SRVTO;
1567 if (!(s->flags & SF_FINST_MASK))
1568 s->flags |= SF_FINST_H;
1569 return 0;
1570 }
1571
Christopher Faulet9768c262018-10-22 09:34:31 +02001572 /* 3: client abort with an abortonclose */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001573 else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001574 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1575 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001576 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001577 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001578
1579 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001580 txn->status = 400;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001581 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001582
1583 if (!(s->flags & SF_ERR_MASK))
1584 s->flags |= SF_ERR_CLICL;
1585 if (!(s->flags & SF_FINST_MASK))
1586 s->flags |= SF_FINST_H;
1587
1588 /* process_stream() will take care of the error */
1589 return 0;
1590 }
1591
Christopher Faulet9768c262018-10-22 09:34:31 +02001592 /* 4: close from server, capture the response if the server has started to respond */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001593 else if (rep->flags & CF_SHUTR) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001594 if ((si_b->flags & SI_FL_L7_RETRY) &&
1595 (s->be->retry_type & PR_RE_DISCONNECTED)) {
1596 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1597 return 0;
1598 }
1599
Olivier Houchard6db16992019-05-17 15:40:49 +02001600 if (txn->flags & TX_NOT_FIRST)
1601 goto abort_keep_alive;
1602
Olivier Houcharda798bf52019-03-08 18:52:00 +01001603 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001604 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001605 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001606 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001607 }
1608
Christopher Faulete0768eb2018-10-03 16:38:02 +02001609 rep->analysers &= AN_RES_FLT_END;
1610 txn->status = 502;
1611 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001612 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001613
1614 if (!(s->flags & SF_ERR_MASK))
1615 s->flags |= SF_ERR_SRVCL;
1616 if (!(s->flags & SF_FINST_MASK))
1617 s->flags |= SF_FINST_H;
1618 return 0;
1619 }
1620
Christopher Faulet9768c262018-10-22 09:34:31 +02001621 /* 5: write error to client (we don't send any message then) */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001622 else if (rep->flags & CF_WRITE_ERROR) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001623 if (txn->flags & TX_NOT_FIRST)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001624 goto abort_keep_alive;
1625
Olivier Houcharda798bf52019-03-08 18:52:00 +01001626 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001627 rep->analysers &= AN_RES_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001628
1629 if (!(s->flags & SF_ERR_MASK))
1630 s->flags |= SF_ERR_CLICL;
1631 if (!(s->flags & SF_FINST_MASK))
1632 s->flags |= SF_FINST_H;
1633
1634 /* process_stream() will take care of the error */
1635 return 0;
1636 }
1637
1638 channel_dont_close(rep);
1639 rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
1640 return 0;
1641 }
1642
1643 /* More interesting part now : we know that we have a complete
1644 * response which at least looks like HTTP. We have an indicator
1645 * of each header's length, so we can parse them quickly.
1646 */
1647
Christopher Faulet9768c262018-10-22 09:34:31 +02001648 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulet297fbb42019-05-13 14:41:27 +02001649 sl = http_get_stline(htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001650
Christopher Faulet9768c262018-10-22 09:34:31 +02001651 /* 0: we might have to print this header in debug mode */
1652 if (unlikely((global.mode & MODE_DEBUG) &&
1653 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
1654 int32_t pos;
1655
Christopher Faulet03599112018-11-27 11:21:21 +01001656 htx_debug_stline("srvrep", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +02001657
Christopher Fauleta3f15502019-05-13 15:27:23 +02001658 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001659 struct htx_blk *blk = htx_get_blk(htx, pos);
1660 enum htx_blk_type type = htx_get_blk_type(blk);
1661
1662 if (type == HTX_BLK_EOH)
1663 break;
1664 if (type != HTX_BLK_HDR)
1665 continue;
1666
1667 htx_debug_hdr("srvhdr", s,
1668 htx_get_blk_name(htx, blk),
1669 htx_get_blk_value(htx, blk));
1670 }
1671 }
1672
Christopher Faulet03599112018-11-27 11:21:21 +01001673 /* 1: get the status code and the version. Also set HTTP flags */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001674 txn->status = sl->info.res.status;
Christopher Faulet03599112018-11-27 11:21:21 +01001675 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +02001676 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +01001677 if (sl->flags & HTX_SL_F_XFER_LEN) {
1678 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +01001679 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +01001680 if (sl->flags & HTX_SL_F_BODYLESS)
1681 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulet03599112018-11-27 11:21:21 +01001682 }
Christopher Faulet9768c262018-10-22 09:34:31 +02001683
1684 n = txn->status / 100;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001685 if (n < 1 || n > 5)
1686 n = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001687
Christopher Faulete0768eb2018-10-03 16:38:02 +02001688 /* when the client triggers a 4xx from the server, it's most often due
1689 * to a missing object or permission. These events should be tracked
1690 * because if they happen often, it may indicate a brute force or a
1691 * vulnerability scan.
1692 */
1693 if (n == 4)
1694 stream_inc_http_err_ctr(s);
1695
1696 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001697 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.p.http.rsp[n], 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001698
Christopher Faulete0768eb2018-10-03 16:38:02 +02001699 /* Adjust server's health based on status code. Note: status codes 501
1700 * and 505 are triggered on demand by client request, so we must not
1701 * count them as server failures.
1702 */
1703 if (objt_server(s->target)) {
1704 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001705 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001706 else
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001707 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001708 }
1709
1710 /*
1711 * We may be facing a 100-continue response, or any other informational
1712 * 1xx response which is non-final, in which case this is not the right
1713 * response, and we're waiting for the next one. Let's allow this response
1714 * to go to the client and wait for the next one. There's an exception for
1715 * 101 which is used later in the code to switch protocols.
1716 */
1717 if (txn->status < 200 &&
1718 (txn->status == 100 || txn->status >= 102)) {
Christopher Fauletf90c24d2019-05-17 09:58:45 +02001719 int32_t pos;
1720
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001721 FLT_STRM_CB(s, flt_http_reset(s, msg));
Christopher Fauletf90c24d2019-05-17 09:58:45 +02001722 for (pos = htx_get_head(htx); pos != -1; pos = htx_get_next(htx, pos)) {
1723 struct htx_blk *blk = htx_get_blk(htx, pos);
1724 enum htx_blk_type type = htx_get_blk_type(blk);
1725
1726 c_adv(rep, htx_get_blksz(blk));
1727 if (type == HTX_BLK_EOM)
1728 break;
1729 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001730 msg->msg_state = HTTP_MSG_RPBEFORE;
1731 txn->status = 0;
1732 s->logs.t_data = -1; /* was not a response yet */
Christopher Faulet9768c262018-10-22 09:34:31 +02001733 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001734 }
1735
1736 /*
1737 * 2: check for cacheability.
1738 */
1739
1740 switch (txn->status) {
1741 case 200:
1742 case 203:
1743 case 204:
1744 case 206:
1745 case 300:
1746 case 301:
1747 case 404:
1748 case 405:
1749 case 410:
1750 case 414:
1751 case 501:
1752 break;
1753 default:
1754 /* RFC7231#6.1:
1755 * Responses with status codes that are defined as
1756 * cacheable by default (e.g., 200, 203, 204, 206,
1757 * 300, 301, 404, 405, 410, 414, and 501 in this
1758 * specification) can be reused by a cache with
1759 * heuristic expiration unless otherwise indicated
1760 * by the method definition or explicit cache
1761 * controls [RFC7234]; all other status codes are
1762 * not cacheable by default.
1763 */
1764 txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
1765 break;
1766 }
1767
1768 /*
1769 * 3: we may need to capture headers
1770 */
1771 s->logs.logwait &= ~LW_RESP;
1772 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
Christopher Faulet9768c262018-10-22 09:34:31 +02001773 htx_capture_headers(htx, s->res_cap, sess->fe->rsp_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001774
Christopher Faulet9768c262018-10-22 09:34:31 +02001775 /* Skip parsing if no content length is possible. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001776 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
1777 txn->status == 101)) {
1778 /* Either we've established an explicit tunnel, or we're
1779 * switching the protocol. In both cases, we're very unlikely
1780 * to understand the next protocols. We have to switch to tunnel
1781 * mode, so that we transfer the request and responses then let
1782 * this protocol pass unmodified. When we later implement specific
1783 * parsers for such protocols, we'll want to check the Upgrade
1784 * header which contains information about that protocol for
1785 * responses with status 101 (eg: see RFC2817 about TLS).
1786 */
1787 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001788 }
1789
Christopher Faulet61608322018-11-23 16:23:45 +01001790 /* check for NTML authentication headers in 401 (WWW-Authenticate) and
1791 * 407 (Proxy-Authenticate) responses and set the connection to private
1792 */
1793 srv_conn = cs_conn(objt_cs(s->si[1].end));
1794 if (srv_conn) {
1795 struct ist hdr;
1796 struct http_hdr_ctx ctx;
1797
1798 if (txn->status == 401)
1799 hdr = ist("WWW-Authenticate");
1800 else if (txn->status == 407)
1801 hdr = ist("Proxy-Authenticate");
1802 else
1803 goto end;
1804
1805 ctx.blk = NULL;
1806 while (http_find_header(htx, hdr, &ctx, 0)) {
1807 if ((ctx.value.len >= 9 && word_match(ctx.value.ptr, ctx.value.len, "Negotiate", 9)) ||
1808 (ctx.value.len >= 4 && word_match(ctx.value.ptr, ctx.value.len, "NTLM", 4)))
1809 srv_conn->flags |= CO_FL_PRIVATE;
1810 }
1811 }
1812
1813 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001814 /* we want to have the response time before we start processing it */
1815 s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
1816
1817 /* end of job, return OK */
1818 rep->analysers &= ~an_bit;
1819 rep->analyse_exp = TICK_ETERNITY;
1820 channel_auto_close(rep);
1821 return 1;
1822
Christopher Faulet47365272018-10-31 17:40:50 +01001823 return_bad_res:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001824 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulet47365272018-10-31 17:40:50 +01001825 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001826 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001827 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
Christopher Faulet47365272018-10-31 17:40:50 +01001828 }
Olivier Houcharde3249a92019-05-03 23:01:47 +02001829 if ((s->be->retry_type & PR_RE_JUNK_REQUEST) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001830 (si_b->flags & SI_FL_L7_RETRY) &&
Olivier Houcharde3249a92019-05-03 23:01:47 +02001831 do_l7_retry(s, si_b) == 0)
1832 return 0;
Christopher Faulet47365272018-10-31 17:40:50 +01001833 txn->status = 502;
1834 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001835 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulet47365272018-10-31 17:40:50 +01001836 rep->analysers &= AN_RES_FLT_END;
1837
1838 if (!(s->flags & SF_ERR_MASK))
1839 s->flags |= SF_ERR_PRXCOND;
1840 if (!(s->flags & SF_FINST_MASK))
1841 s->flags |= SF_FINST_H;
1842 return 0;
1843
Christopher Faulete0768eb2018-10-03 16:38:02 +02001844 abort_keep_alive:
1845 /* A keep-alive request to the server failed on a network error.
1846 * The client is required to retry. We need to close without returning
1847 * any other information so that the client retries.
1848 */
1849 txn->status = 0;
1850 rep->analysers &= AN_RES_FLT_END;
1851 s->req.analysers &= AN_REQ_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001852 s->logs.logwait = 0;
1853 s->logs.level = 0;
1854 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Faulet9768c262018-10-22 09:34:31 +02001855 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001856 return 0;
1857}
1858
1859/* This function performs all the processing enabled for the current response.
1860 * It normally returns 1 unless it wants to break. It relies on buffers flags,
1861 * and updates s->res.analysers. It might make sense to explode it into several
1862 * other functions. It works like process_request (see indications above).
1863 */
1864int htx_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
1865{
1866 struct session *sess = s->sess;
1867 struct http_txn *txn = s->txn;
1868 struct http_msg *msg = &txn->rsp;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001869 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001870 struct proxy *cur_proxy;
1871 struct cond_wordlist *wl;
1872 enum rule_result ret = HTTP_RULE_RES_CONT;
1873
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001874 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
1875 return 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001876
Christopher Faulete0768eb2018-10-03 16:38:02 +02001877 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1878 now_ms, __FUNCTION__,
1879 s,
1880 rep,
1881 rep->rex, rep->wex,
1882 rep->flags,
1883 ci_data(rep),
1884 rep->analysers);
1885
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001886 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001887
1888 /* The stats applet needs to adjust the Connection header but we don't
1889 * apply any filter there.
1890 */
1891 if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
1892 rep->analysers &= ~an_bit;
1893 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001894 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001895 }
1896
1897 /*
1898 * We will have to evaluate the filters.
1899 * As opposed to version 1.2, now they will be evaluated in the
1900 * filters order and not in the header order. This means that
1901 * each filter has to be validated among all headers.
1902 *
1903 * Filters are tried with ->be first, then with ->fe if it is
1904 * different from ->be.
1905 *
1906 * Maybe we are in resume condiion. In this case I choose the
1907 * "struct proxy" which contains the rule list matching the resume
1908 * pointer. If none of theses "struct proxy" match, I initialise
1909 * the process with the first one.
1910 *
1911 * In fact, I check only correspondance betwwen the current list
1912 * pointer and the ->fe rule list. If it doesn't match, I initialize
1913 * the loop with the ->be.
1914 */
1915 if (s->current_rule_list == &sess->fe->http_res_rules)
1916 cur_proxy = sess->fe;
1917 else
1918 cur_proxy = s->be;
1919 while (1) {
1920 struct proxy *rule_set = cur_proxy;
1921
1922 /* evaluate http-response rules */
1923 if (ret == HTTP_RULE_RES_CONT) {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001924 ret = htx_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001925
1926 if (ret == HTTP_RULE_RES_BADREQ)
1927 goto return_srv_prx_502;
1928
1929 if (ret == HTTP_RULE_RES_DONE) {
1930 rep->analysers &= ~an_bit;
1931 rep->analyse_exp = TICK_ETERNITY;
1932 return 1;
1933 }
1934 }
1935
1936 /* we need to be called again. */
1937 if (ret == HTTP_RULE_RES_YIELD) {
1938 channel_dont_close(rep);
1939 return 0;
1940 }
1941
1942 /* try headers filters */
1943 if (rule_set->rsp_exp != NULL) {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001944 if (htx_apply_filters_to_response(s, rep, rule_set) < 0)
1945 goto return_bad_resp;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001946 }
1947
1948 /* has the response been denied ? */
1949 if (txn->flags & TX_SVDENY) {
1950 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001951 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_secu, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001952
Olivier Houcharda798bf52019-03-08 18:52:00 +01001953 _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
1954 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001955 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001956 _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001957 goto return_srv_prx_502;
1958 }
1959
1960 /* add response headers from the rule sets in the same order */
1961 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001962 struct ist n, v;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001963 if (txn->status < 200 && txn->status != 101)
1964 break;
1965 if (wl->cond) {
1966 int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
1967 ret = acl_pass(ret);
1968 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
1969 ret = !ret;
1970 if (!ret)
1971 continue;
1972 }
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001973
1974 http_parse_header(ist2(wl->s, strlen(wl->s)), &n, &v);
1975 if (unlikely(!http_add_header(htx, n, v)))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001976 goto return_bad_resp;
1977 }
1978
1979 /* check whether we're already working on the frontend */
1980 if (cur_proxy == sess->fe)
1981 break;
1982 cur_proxy = sess->fe;
1983 }
1984
1985 /* After this point, this anayzer can't return yield, so we can
1986 * remove the bit corresponding to this analyzer from the list.
1987 *
1988 * Note that the intermediate returns and goto found previously
1989 * reset the analyzers.
1990 */
1991 rep->analysers &= ~an_bit;
1992 rep->analyse_exp = TICK_ETERNITY;
1993
1994 /* OK that's all we can do for 1xx responses */
1995 if (unlikely(txn->status < 200 && txn->status != 101))
Christopher Fauletf2824e62018-10-01 12:12:37 +02001996 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001997
1998 /*
1999 * Now check for a server cookie.
2000 */
2001 if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002002 htx_manage_server_side_cookies(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002003
2004 /*
2005 * Check for cache-control or pragma headers if required.
2006 */
2007 if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
2008 check_response_for_cacheability(s, rep);
2009
2010 /*
2011 * Add server cookie in the response if needed
2012 */
2013 if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
2014 !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
2015 (!(s->flags & SF_DIRECT) ||
2016 ((s->be->cookie_maxidle || txn->cookie_last_date) &&
2017 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
2018 (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
2019 (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
2020 (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
2021 !(s->flags & SF_IGNORE_PRST)) {
2022 /* the server is known, it's not the one the client requested, or the
2023 * cookie's last seen date needs to be refreshed. We have to
2024 * insert a set-cookie here, except if we want to insert only on POST
2025 * requests and this one isn't. Note that servers which don't have cookies
2026 * (eg: some backup servers) will return a full cookie removal request.
2027 */
2028 if (!objt_server(s->target)->cookie) {
2029 chunk_printf(&trash,
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002030 "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
Christopher Faulete0768eb2018-10-03 16:38:02 +02002031 s->be->cookie_name);
2032 }
2033 else {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002034 chunk_printf(&trash, "%s=%s", s->be->cookie_name, objt_server(s->target)->cookie);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002035
2036 if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
2037 /* emit last_date, which is mandatory */
2038 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2039 s30tob64((date.tv_sec+3) >> 2,
2040 trash.area + trash.data);
2041 trash.data += 5;
2042
2043 if (s->be->cookie_maxlife) {
2044 /* emit first_date, which is either the original one or
2045 * the current date.
2046 */
2047 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2048 s30tob64(txn->cookie_first_date ?
2049 txn->cookie_first_date >> 2 :
2050 (date.tv_sec+3) >> 2,
2051 trash.area + trash.data);
2052 trash.data += 5;
2053 }
2054 }
2055 chunk_appendf(&trash, "; path=/");
2056 }
2057
2058 if (s->be->cookie_domain)
2059 chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
2060
2061 if (s->be->ck_opts & PR_CK_HTTPONLY)
2062 chunk_appendf(&trash, "; HttpOnly");
2063
2064 if (s->be->ck_opts & PR_CK_SECURE)
2065 chunk_appendf(&trash, "; Secure");
2066
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002067 if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002068 goto return_bad_resp;
2069
2070 txn->flags &= ~TX_SCK_MASK;
2071 if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
2072 /* the server did not change, only the date was updated */
2073 txn->flags |= TX_SCK_UPDATED;
2074 else
2075 txn->flags |= TX_SCK_INSERTED;
2076
2077 /* Here, we will tell an eventual cache on the client side that we don't
2078 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
2079 * Some caches understand the correct form: 'no-cache="set-cookie"', but
2080 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
2081 */
2082 if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
2083
2084 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
2085
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002086 if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private"))))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002087 goto return_bad_resp;
2088 }
2089 }
2090
2091 /*
2092 * Check if result will be cacheable with a cookie.
2093 * We'll block the response if security checks have caught
2094 * nasty things such as a cacheable cookie.
2095 */
2096 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
2097 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
2098 (s->be->options & PR_O_CHK_CACHE)) {
2099 /* we're in presence of a cacheable response containing
2100 * a set-cookie header. We'll block it as requested by
2101 * the 'checkcache' option, and send an alert.
2102 */
2103 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01002104 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_secu, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002105
Olivier Houcharda798bf52019-03-08 18:52:00 +01002106 _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
2107 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002108 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01002109 _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002110
2111 ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
2112 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
2113 send_log(s->be, LOG_ALERT,
2114 "Blocking cacheable cookie in response from instance %s, server %s.\n",
2115 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
2116 goto return_srv_prx_502;
2117 }
2118
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002119 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002120 /* Always enter in the body analyzer */
2121 rep->analysers &= ~AN_RES_FLT_XFER_DATA;
2122 rep->analysers |= AN_RES_HTTP_XFER_BODY;
2123
2124 /* if the user wants to log as soon as possible, without counting
2125 * bytes from the server, then this is the right moment. We have
2126 * to temporarily assign bytes_out to log what we currently have.
2127 */
2128 if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
2129 s->logs.t_close = s->logs.t_data; /* to get a valid end date */
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002130 s->logs.bytes_out = htx->data;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002131 s->do_log(s);
2132 s->logs.bytes_out = 0;
2133 }
2134 return 1;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002135
2136 return_bad_resp:
2137 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01002138 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01002139 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002140 }
Olivier Houcharda798bf52019-03-08 18:52:00 +01002141 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002142
2143 return_srv_prx_502:
2144 rep->analysers &= AN_RES_FLT_END;
2145 txn->status = 502;
2146 s->logs.t_data = -1; /* was not a valid response */
2147 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01002148 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002149 if (!(s->flags & SF_ERR_MASK))
2150 s->flags |= SF_ERR_PRXCOND;
2151 if (!(s->flags & SF_FINST_MASK))
2152 s->flags |= SF_FINST_H;
2153 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002154}
2155
2156/* This function is an analyser which forwards response body (including chunk
2157 * sizes if any). It is called as soon as we must forward, even if we forward
2158 * zero byte. The only situation where it must not be called is when we're in
2159 * tunnel mode and we want to forward till the close. It's used both to forward
2160 * remaining data and to resync after end of body. It expects the msg_state to
2161 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
2162 * read more data, or 1 once we can go on with next request or end the stream.
2163 *
2164 * It is capable of compressing response data both in content-length mode and
2165 * in chunked mode. The state machines follows different flows depending on
2166 * whether content-length and chunked modes are used, since there are no
2167 * trailers in content-length :
2168 *
2169 * chk-mode cl-mode
2170 * ,----- BODY -----.
2171 * / \
2172 * V size > 0 V chk-mode
2173 * .--> SIZE -------------> DATA -------------> CRLF
2174 * | | size == 0 | last byte |
2175 * | v final crlf v inspected |
2176 * | TRAILERS -----------> DONE |
2177 * | |
2178 * `----------------------------------------------'
2179 *
2180 * Compression only happens in the DATA state, and must be flushed in final
2181 * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
2182 * is performed at once on final states for all bytes parsed, or when leaving
2183 * on missing data.
2184 */
2185int htx_response_forward_body(struct stream *s, struct channel *res, int an_bit)
2186{
2187 struct session *sess = s->sess;
2188 struct http_txn *txn = s->txn;
2189 struct http_msg *msg = &s->txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02002190 struct htx *htx;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002191 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002192
2193 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
2194 now_ms, __FUNCTION__,
2195 s,
2196 res,
2197 res->rex, res->wex,
2198 res->flags,
2199 ci_data(res),
2200 res->analysers);
2201
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002202 htx = htxbuf(&res->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002203
2204 if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
Christopher Fauletf2824e62018-10-01 12:12:37 +02002205 ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002206 /* Output closed while we were sending data. We must abort and
2207 * wake the other side up.
2208 */
2209 msg->err_state = msg->msg_state;
2210 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002211 htx_end_response(s);
2212 htx_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002213 return 1;
2214 }
2215
Christopher Faulet9768c262018-10-22 09:34:31 +02002216 if (msg->msg_state == HTTP_MSG_BODY)
2217 msg->msg_state = HTTP_MSG_DATA;
2218
Christopher Faulete0768eb2018-10-03 16:38:02 +02002219 /* in most states, we should abort in case of early close */
2220 channel_auto_close(res);
2221
Christopher Faulete0768eb2018-10-03 16:38:02 +02002222 if (res->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01002223 if (res->to_forward == CHN_INFINITE_FORWARD) {
2224 if (res->flags & (CF_SHUTR|CF_EOI)) {
2225 msg->msg_state = HTTP_MSG_DONE;
2226 res->to_forward = 0;
2227 goto done;
2228 }
2229 }
2230 else {
2231 /* We can't process the buffer's contents yet */
2232 res->flags |= CF_WAKE_WRITE;
2233 goto missing_data_or_waiting;
2234 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002235 }
2236
Christopher Faulet9768c262018-10-22 09:34:31 +02002237 if (msg->msg_state >= HTTP_MSG_DONE)
2238 goto done;
2239
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002240 /* Forward input data. We get it by removing all outgoing data not
2241 * forwarded yet from HTX data size. If there are some data filters, we
2242 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02002243 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002244 if (HAS_RSP_DATA_FILTERS(s)) {
2245 ret = flt_http_payload(s, msg, htx->data);
2246 if (ret < 0)
2247 goto return_bad_res;
2248 c_adv(res, ret);
2249 if (htx->data != co_data(res) || htx->extra)
2250 goto missing_data_or_waiting;
2251 }
2252 else {
2253 c_adv(res, htx->data - co_data(res));
Christopher Faulet66af0b22019-03-22 14:54:52 +01002254 if (msg->flags & HTTP_MSGF_XFER_LEN)
2255 channel_htx_forward_forever(res, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002256 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002257
Christopher Fauletc62c2b92019-03-28 11:41:39 +01002258 if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 ||
2259 (!(msg->flags & HTTP_MSGF_XFER_LEN) && (res->flags & CF_SHUTR || !HAS_RSP_DATA_FILTERS(s)))) {
2260 msg->msg_state = HTTP_MSG_TUNNEL;
2261 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002262 }
2263
Christopher Faulet9768c262018-10-22 09:34:31 +02002264 /* Check if the end-of-message is reached and if so, switch the message
2265 * in HTTP_MSG_DONE state.
2266 */
2267 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
2268 goto missing_data_or_waiting;
2269
2270 msg->msg_state = HTTP_MSG_DONE;
Christopher Fauletaed68d42019-03-28 18:12:46 +01002271 res->to_forward = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02002272
2273 done:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002274 /* other states, DONE...TUNNEL */
Christopher Faulet9768c262018-10-22 09:34:31 +02002275 channel_dont_close(res);
2276
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002277 if (HAS_RSP_DATA_FILTERS(s)) {
2278 ret = flt_http_end(s, msg);
2279 if (ret <= 0) {
2280 if (!ret)
2281 goto missing_data_or_waiting;
2282 goto return_bad_res;
2283 }
2284 }
2285
Christopher Fauletf2824e62018-10-01 12:12:37 +02002286 htx_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002287 if (!(res->analysers & an_bit)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02002288 htx_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002289 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2290 if (res->flags & CF_SHUTW) {
2291 /* response errors are most likely due to the
2292 * client aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002293 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002294 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002295 goto return_bad_res;
2296 }
2297 return 1;
2298 }
2299 return 0;
2300
2301 missing_data_or_waiting:
2302 if (res->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01002303 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002304
Christopher Faulet47365272018-10-31 17:40:50 +01002305 if (htx->flags & HTX_FL_PARSING_ERROR)
2306 goto return_bad_res;
2307
Christopher Faulete0768eb2018-10-03 16:38:02 +02002308 /* stop waiting for data if the input is closed before the end. If the
2309 * client side was already closed, it means that the client has aborted,
2310 * so we don't want to count this as a server abort. Otherwise it's a
2311 * server abort.
2312 */
Christopher Faulet9768c262018-10-22 09:34:31 +02002313 if (msg->msg_state < HTTP_MSG_DONE && res->flags & CF_SHUTR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002314 if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002315 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002316 /* If we have some pending data, we continue the processing */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002317 if (htx_is_empty(htx))
2318 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002319 }
2320
Christopher Faulete0768eb2018-10-03 16:38:02 +02002321 /* When TE: chunked is used, we need to get there again to parse
2322 * remaining chunks even if the server has closed, so we don't want to
Christopher Faulet9768c262018-10-22 09:34:31 +02002323 * set CF_DONTCLOSE. Similarly when there is a content-leng or if there
2324 * are filters registered on the stream, we don't want to forward a
2325 * close
Christopher Faulete0768eb2018-10-03 16:38:02 +02002326 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002327 if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002328 channel_dont_close(res);
2329
2330 /* We know that more data are expected, but we couldn't send more that
2331 * what we did. So we always set the CF_EXPECT_MORE flag so that the
2332 * system knows it must not set a PUSH on this first part. Interactive
2333 * modes are already handled by the stream sock layer. We must not do
2334 * this in content-length mode because it could present the MSG_MORE
2335 * flag with the last block of forwarded data, which would cause an
2336 * additional delay to be observed by the receiver.
2337 */
2338 if ((msg->flags & HTTP_MSGF_TE_CHNK) || (msg->flags & HTTP_MSGF_COMPRESSING))
2339 res->flags |= CF_EXPECT_MORE;
2340
2341 /* the stream handler will take care of timeouts and errors */
2342 return 0;
2343
Christopher Faulet93e02d82019-03-08 14:18:50 +01002344 return_srv_abort:
2345 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
2346 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002347 if (objt_server(s->target))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002348 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1);
2349 if (!(s->flags & SF_ERR_MASK))
2350 s->flags |= SF_ERR_SRVCL;
2351 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002352
Christopher Faulet93e02d82019-03-08 14:18:50 +01002353 return_cli_abort:
2354 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
2355 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002356 if (objt_server(s->target))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002357 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
2358 if (!(s->flags & SF_ERR_MASK))
2359 s->flags |= SF_ERR_CLICL;
2360 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002361
Christopher Faulet93e02d82019-03-08 14:18:50 +01002362 return_bad_res:
2363 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
2364 if (objt_server(s->target)) {
2365 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_resp, 1);
2366 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2367 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002368 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002369 s->flags |= SF_ERR_SRVCL;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002370
Christopher Faulet93e02d82019-03-08 14:18:50 +01002371 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002372 txn->rsp.err_state = txn->rsp.msg_state;
2373 txn->rsp.msg_state = HTTP_MSG_ERROR;
2374 /* don't send any error message as we're in the body */
Christopher Faulet9768c262018-10-22 09:34:31 +02002375 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002376 res->analysers &= AN_RES_FLT_END;
2377 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 +02002378 if (!(s->flags & SF_FINST_MASK))
2379 s->flags |= SF_FINST_D;
2380 return 0;
2381}
2382
Christopher Fauletf2824e62018-10-01 12:12:37 +02002383/* Perform an HTTP redirect based on the information in <rule>. The function
Christopher Faulet99daf282018-11-28 22:58:13 +01002384 * returns zero on success, or zero in case of a, irrecoverable error such
Christopher Fauletf2824e62018-10-01 12:12:37 +02002385 * as too large a request to build a valid response.
2386 */
2387int htx_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
2388{
Christopher Faulet99daf282018-11-28 22:58:13 +01002389 struct channel *req = &s->req;
2390 struct channel *res = &s->res;
2391 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01002392 struct htx_sl *sl;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002393 struct buffer *chunk;
Christopher Faulet99daf282018-11-28 22:58:13 +01002394 struct ist status, reason, location;
2395 unsigned int flags;
2396 size_t data;
Christopher Faulet08e66462019-05-23 16:44:59 +02002397 int close = 0; /* Try to keep the connection alive byt default */
Christopher Fauletf2824e62018-10-01 12:12:37 +02002398
2399 chunk = alloc_trash_chunk();
2400 if (!chunk)
Christopher Faulet99daf282018-11-28 22:58:13 +01002401 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002402
Christopher Faulet99daf282018-11-28 22:58:13 +01002403 /*
2404 * Create the location
2405 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002406 htx = htxbuf(&req->buf);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002407 switch(rule->type) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002408 case REDIRECT_TYPE_SCHEME: {
2409 struct http_hdr_ctx ctx;
2410 struct ist path, host;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002411
Christopher Faulet99daf282018-11-28 22:58:13 +01002412 host = ist("");
2413 ctx.blk = NULL;
2414 if (http_find_header(htx, ist("Host"), &ctx, 0))
2415 host = ctx.value;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002416
Christopher Faulet297fbb42019-05-13 14:41:27 +02002417 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002418 path = http_get_path(htx_sl_req_uri(sl));
2419 /* build message using path */
2420 if (path.ptr) {
2421 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2422 int qs = 0;
2423 while (qs < path.len) {
2424 if (*(path.ptr + qs) == '?') {
2425 path.len = qs;
2426 break;
2427 }
2428 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002429 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002430 }
2431 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002432 else
2433 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002434
Christopher Faulet99daf282018-11-28 22:58:13 +01002435 if (rule->rdr_str) { /* this is an old "redirect" rule */
2436 /* add scheme */
2437 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2438 goto fail;
2439 }
2440 else {
2441 /* add scheme with executing log format */
2442 chunk->data += build_logline(s, chunk->area + chunk->data,
2443 chunk->size - chunk->data,
2444 &rule->rdr_fmt);
2445 }
2446 /* add "://" + host + path */
2447 if (!chunk_memcat(chunk, "://", 3) ||
2448 !chunk_memcat(chunk, host.ptr, host.len) ||
2449 !chunk_memcat(chunk, path.ptr, path.len))
2450 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002451
Christopher Faulet99daf282018-11-28 22:58:13 +01002452 /* append a slash at the end of the location if needed and missing */
2453 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2454 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2455 if (chunk->data + 1 >= chunk->size)
2456 goto fail;
2457 chunk->area[chunk->data++] = '/';
2458 }
2459 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002460 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002461
Christopher Faulet99daf282018-11-28 22:58:13 +01002462 case REDIRECT_TYPE_PREFIX: {
2463 struct ist path;
2464
Christopher Faulet297fbb42019-05-13 14:41:27 +02002465 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002466 path = http_get_path(htx_sl_req_uri(sl));
2467 /* build message using path */
2468 if (path.ptr) {
2469 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2470 int qs = 0;
2471 while (qs < path.len) {
2472 if (*(path.ptr + qs) == '?') {
2473 path.len = qs;
2474 break;
2475 }
2476 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002477 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002478 }
2479 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002480 else
2481 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002482
Christopher Faulet99daf282018-11-28 22:58:13 +01002483 if (rule->rdr_str) { /* this is an old "redirect" rule */
2484 /* add prefix. Note that if prefix == "/", we don't want to
2485 * add anything, otherwise it makes it hard for the user to
2486 * configure a self-redirection.
2487 */
2488 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
2489 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2490 goto fail;
2491 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002492 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002493 else {
2494 /* add prefix with executing log format */
2495 chunk->data += build_logline(s, chunk->area + chunk->data,
2496 chunk->size - chunk->data,
2497 &rule->rdr_fmt);
2498 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002499
Christopher Faulet99daf282018-11-28 22:58:13 +01002500 /* add path */
2501 if (!chunk_memcat(chunk, path.ptr, path.len))
2502 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002503
Christopher Faulet99daf282018-11-28 22:58:13 +01002504 /* append a slash at the end of the location if needed and missing */
2505 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2506 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2507 if (chunk->data + 1 >= chunk->size)
2508 goto fail;
2509 chunk->area[chunk->data++] = '/';
2510 }
2511 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002512 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002513 case REDIRECT_TYPE_LOCATION:
2514 default:
2515 if (rule->rdr_str) { /* this is an old "redirect" rule */
2516 /* add location */
2517 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2518 goto fail;
2519 }
2520 else {
2521 /* add location with executing log format */
2522 chunk->data += build_logline(s, chunk->area + chunk->data,
2523 chunk->size - chunk->data,
2524 &rule->rdr_fmt);
2525 }
2526 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002527 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002528 location = ist2(chunk->area, chunk->data);
2529
2530 /*
2531 * Create the 30x response
2532 */
2533 switch (rule->code) {
2534 case 308:
2535 status = ist("308");
2536 reason = ist("Permanent Redirect");
2537 break;
2538 case 307:
2539 status = ist("307");
2540 reason = ist("Temporary Redirect");
2541 break;
2542 case 303:
2543 status = ist("303");
2544 reason = ist("See Other");
2545 break;
2546 case 301:
2547 status = ist("301");
2548 reason = ist("Moved Permanently");
2549 break;
2550 case 302:
2551 default:
2552 status = ist("302");
2553 reason = ist("Found");
2554 break;
2555 }
2556
Christopher Faulet08e66462019-05-23 16:44:59 +02002557 if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE)
2558 close = 1;
2559
Christopher Faulet99daf282018-11-28 22:58:13 +01002560 htx = htx_from_buf(&res->buf);
2561 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2562 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason);
2563 if (!sl)
2564 goto fail;
2565 sl->info.res.status = rule->code;
2566 s->txn->status = rule->code;
2567
Christopher Faulet08e66462019-05-23 16:44:59 +02002568 if (close && !htx_add_header(htx, ist("Connection"), ist("close")))
2569 goto fail;
2570
2571 if (!htx_add_header(htx, ist("Content-length"), ist("0")) ||
Christopher Faulet99daf282018-11-28 22:58:13 +01002572 !htx_add_header(htx, ist("Location"), location))
2573 goto fail;
2574
2575 if (rule->code == 302 || rule->code == 303 || rule->code == 307) {
2576 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")))
2577 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002578 }
2579
2580 if (rule->cookie_len) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002581 if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len)))
2582 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002583 }
2584
Christopher Faulet99daf282018-11-28 22:58:13 +01002585 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
2586 goto fail;
2587
Christopher Fauletf2824e62018-10-01 12:12:37 +02002588 /* let's log the request time */
2589 s->logs.tv_request = now;
2590
Christopher Faulet99daf282018-11-28 22:58:13 +01002591 data = htx->data - co_data(res);
Christopher Faulet99daf282018-11-28 22:58:13 +01002592 c_adv(res, data);
2593 res->total += data;
2594
2595 channel_auto_read(req);
2596 channel_abort(req);
2597 channel_auto_close(req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002598 channel_htx_erase(req, htxbuf(&req->buf));
Christopher Faulet99daf282018-11-28 22:58:13 +01002599
2600 res->wex = tick_add_ifset(now_ms, res->wto);
2601 channel_auto_read(res);
2602 channel_auto_close(res);
2603 channel_shutr_now(res);
2604
2605 req->analysers &= AN_REQ_FLT_END;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002606
2607 if (!(s->flags & SF_ERR_MASK))
2608 s->flags |= SF_ERR_LOCAL;
2609 if (!(s->flags & SF_FINST_MASK))
2610 s->flags |= SF_FINST_R;
2611
Christopher Faulet99daf282018-11-28 22:58:13 +01002612 free_trash_chunk(chunk);
2613 return 1;
2614
2615 fail:
2616 /* If an error occurred, remove the incomplete HTTP response from the
2617 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002618 channel_htx_truncate(res, htxbuf(&res->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02002619 free_trash_chunk(chunk);
Christopher Faulet99daf282018-11-28 22:58:13 +01002620 return 0;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002621}
2622
Christopher Faulet72333522018-10-24 11:25:02 +02002623int htx_transform_header_str(struct stream* s, struct channel *chn, struct htx *htx,
2624 struct ist name, const char *str, struct my_regex *re, int action)
2625{
2626 struct http_hdr_ctx ctx;
2627 struct buffer *output = get_trash_chunk();
2628
2629 /* find full header is action is ACT_HTTP_REPLACE_HDR */
2630 ctx.blk = NULL;
2631 while (http_find_header(htx, name, &ctx, (action == ACT_HTTP_REPLACE_HDR))) {
2632 if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0))
2633 continue;
2634
2635 output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch);
2636 if (output->data == -1)
2637 return -1;
2638 if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data)))
2639 return -1;
2640 }
2641 return 0;
2642}
2643
2644static int htx_transform_header(struct stream* s, struct channel *chn, struct htx *htx,
2645 const struct ist name, struct list *fmt, struct my_regex *re, int action)
2646{
2647 struct buffer *replace;
2648 int ret = -1;
2649
2650 replace = alloc_trash_chunk();
2651 if (!replace)
2652 goto leave;
2653
2654 replace->data = build_logline(s, replace->area, replace->size, fmt);
2655 if (replace->data >= replace->size - 1)
2656 goto leave;
2657
2658 ret = htx_transform_header_str(s, chn, htx, name, replace->area, re, action);
2659
2660 leave:
2661 free_trash_chunk(replace);
2662 return ret;
2663}
2664
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002665
2666/* Terminate a 103-Erly-hints response and send it to the client. It returns 0
2667 * on success and -1 on error. The response channel is updated accordingly.
2668 */
2669static int htx_reply_103_early_hints(struct channel *res)
2670{
2671 struct htx *htx = htx_from_buf(&res->buf);
2672 size_t data;
2673
2674 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM)) {
2675 /* If an error occurred during an Early-hint rule,
2676 * remove the incomplete HTTP 103 response from the
2677 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002678 channel_htx_truncate(res, htx);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002679 return -1;
2680 }
2681
2682 data = htx->data - co_data(res);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002683 c_adv(res, data);
2684 res->total += data;
2685 return 0;
2686}
2687
Christopher Faulet6eb92892018-11-15 16:39:29 +01002688/*
2689 * Build an HTTP Early Hint HTTP 103 response header with <name> as name and with a value
2690 * built according to <fmt> log line format.
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002691 * If <early_hints> is 0, it is starts a new response by adding the start
2692 * line. If an error occurred -1 is returned. On success 0 is returned. The
2693 * channel is not updated here. It must be done calling the function
2694 * htx_reply_103_early_hints().
Christopher Faulet6eb92892018-11-15 16:39:29 +01002695 */
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002696static int htx_add_early_hint_header(struct stream *s, int early_hints, const struct ist name, struct list *fmt)
Christopher Faulet6eb92892018-11-15 16:39:29 +01002697{
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002698 struct channel *res = &s->res;
2699 struct htx *htx = htx_from_buf(&res->buf);
2700 struct buffer *value = alloc_trash_chunk();
2701
Christopher Faulet6eb92892018-11-15 16:39:29 +01002702 if (!early_hints) {
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002703 struct htx_sl *sl;
2704 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
2705 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2706
2707 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
2708 ist("HTTP/1.1"), ist("103"), ist("Early Hints"));
2709 if (!sl)
Christopher Faulet6eb92892018-11-15 16:39:29 +01002710 goto fail;
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002711 sl->info.res.status = 103;
Christopher Faulet6eb92892018-11-15 16:39:29 +01002712 }
2713
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002714 value->data = build_logline(s, b_tail(value), b_room(value), fmt);
2715 if (!htx_add_header(htx, name, ist2(b_head(value), b_data(value))))
Christopher Faulet6eb92892018-11-15 16:39:29 +01002716 goto fail;
2717
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002718 free_trash_chunk(value);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002719 return 1;
Christopher Faulet6eb92892018-11-15 16:39:29 +01002720
2721 fail:
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002722 /* If an error occurred during an Early-hint rule, remove the incomplete
2723 * HTTP 103 response from the buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002724 channel_htx_truncate(res, htx);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002725 free_trash_chunk(value);
2726 return -1;
Christopher Faulet6eb92892018-11-15 16:39:29 +01002727}
2728
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002729/* This function executes one of the set-{method,path,query,uri} actions. It
2730 * takes the string from the variable 'replace' with length 'len', then modifies
2731 * the relevant part of the request line accordingly. Then it updates various
2732 * pointers to the next elements which were moved, and the total buffer length.
2733 * It finds the action to be performed in p[2], previously filled by function
2734 * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
2735 * error, though this can be revisited when this code is finally exploited.
2736 *
2737 * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
2738 * query string and 3 to replace uri.
2739 *
2740 * In query string case, the mark question '?' must be set at the start of the
2741 * string by the caller, event if the replacement query string is empty.
2742 */
2743int htx_req_replace_stline(int action, const char *replace, int len,
2744 struct proxy *px, struct stream *s)
2745{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002746 struct htx *htx = htxbuf(&s->req.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002747
2748 switch (action) {
2749 case 0: // method
2750 if (!http_replace_req_meth(htx, ist2(replace, len)))
2751 return -1;
2752 break;
2753
2754 case 1: // path
2755 if (!http_replace_req_path(htx, ist2(replace, len)))
2756 return -1;
2757 break;
2758
2759 case 2: // query
2760 if (!http_replace_req_query(htx, ist2(replace, len)))
2761 return -1;
2762 break;
2763
2764 case 3: // uri
2765 if (!http_replace_req_uri(htx, ist2(replace, len)))
2766 return -1;
2767 break;
2768
2769 default:
2770 return -1;
2771 }
2772 return 0;
2773}
2774
2775/* This function replace the HTTP status code and the associated message. The
2776 * variable <status> contains the new status code. This function never fails.
2777 */
2778void htx_res_set_status(unsigned int status, const char *reason, struct stream *s)
2779{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002780 struct htx *htx = htxbuf(&s->res.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002781 char *res;
2782
2783 chunk_reset(&trash);
2784 res = ultoa_o(status, trash.area, trash.size);
2785 trash.data = res - trash.area;
2786
2787 /* Do we have a custom reason format string? */
2788 if (reason == NULL)
2789 reason = http_get_reason(status);
2790
Christopher Faulet87a2c0d2018-12-13 21:58:18 +01002791 if (http_replace_res_status(htx, ist2(trash.area, trash.data)))
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002792 http_replace_res_reason(htx, ist2(reason, strlen(reason)));
2793}
2794
Christopher Faulet3e964192018-10-24 11:39:23 +02002795/* Executes the http-request rules <rules> for stream <s>, proxy <px> and
2796 * transaction <txn>. Returns the verdict of the first rule that prevents
2797 * further processing of the request (auth, deny, ...), and defaults to
2798 * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
2799 * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
2800 * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
2801 * and a deny/tarpit rule is matched, it will be filled with this rule's deny
2802 * status.
2803 */
2804static enum rule_result htx_req_get_intercept_rule(struct proxy *px, struct list *rules,
2805 struct stream *s, int *deny_status)
2806{
2807 struct session *sess = strm_sess(s);
2808 struct http_txn *txn = s->txn;
2809 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02002810 struct act_rule *rule;
2811 struct http_hdr_ctx ctx;
2812 const char *auth_realm;
Christopher Faulet3e964192018-10-24 11:39:23 +02002813 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
2814 int act_flags = 0;
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002815 int early_hints = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002816
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002817 htx = htxbuf(&s->req.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02002818
2819 /* If "the current_rule_list" match the executed rule list, we are in
2820 * resume condition. If a resume is needed it is always in the action
2821 * and never in the ACL or converters. In this case, we initialise the
2822 * current rule, and go to the action execution point.
2823 */
2824 if (s->current_rule) {
2825 rule = s->current_rule;
2826 s->current_rule = NULL;
2827 if (s->current_rule_list == rules)
2828 goto resume_execution;
2829 }
2830 s->current_rule_list = rules;
2831
2832 list_for_each_entry(rule, rules, list) {
2833 /* check optional condition */
2834 if (rule->cond) {
2835 int ret;
2836
2837 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
2838 ret = acl_pass(ret);
2839
2840 if (rule->cond->pol == ACL_COND_UNLESS)
2841 ret = !ret;
2842
2843 if (!ret) /* condition not matched */
2844 continue;
2845 }
2846
2847 act_flags |= ACT_FLAG_FIRST;
2848 resume_execution:
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002849 if (early_hints && rule->action != ACT_HTTP_EARLY_HINT) {
2850 early_hints = 0;
2851 if (htx_reply_103_early_hints(&s->res) == -1) {
2852 rule_ret = HTTP_RULE_RES_BADREQ;
2853 goto end;
2854 }
2855 }
2856
Christopher Faulet3e964192018-10-24 11:39:23 +02002857 switch (rule->action) {
2858 case ACT_ACTION_ALLOW:
2859 rule_ret = HTTP_RULE_RES_STOP;
2860 goto end;
2861
2862 case ACT_ACTION_DENY:
2863 if (deny_status)
2864 *deny_status = rule->deny_status;
2865 rule_ret = HTTP_RULE_RES_DENY;
2866 goto end;
2867
2868 case ACT_HTTP_REQ_TARPIT:
2869 txn->flags |= TX_CLTARPIT;
2870 if (deny_status)
2871 *deny_status = rule->deny_status;
2872 rule_ret = HTTP_RULE_RES_DENY;
2873 goto end;
2874
2875 case ACT_HTTP_REQ_AUTH:
Christopher Faulet3e964192018-10-24 11:39:23 +02002876 /* Auth might be performed on regular http-req rules as well as on stats */
2877 auth_realm = rule->arg.auth.realm;
2878 if (!auth_realm) {
2879 if (px->uri_auth && rules == &px->uri_auth->http_req_rules)
2880 auth_realm = STATS_DEFAULT_REALM;
2881 else
2882 auth_realm = px->id;
2883 }
2884 /* send 401/407 depending on whether we use a proxy or not. We still
2885 * count one error, because normal browsing won't significantly
2886 * increase the counter but brute force attempts will.
2887 */
Christopher Faulet3e964192018-10-24 11:39:23 +02002888 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Faulet12c51e22018-11-28 15:59:42 +01002889 if (htx_reply_40x_unauthorized(s, auth_realm) == -1)
2890 rule_ret = HTTP_RULE_RES_BADREQ;
2891 stream_inc_http_err_ctr(s);
Christopher Faulet3e964192018-10-24 11:39:23 +02002892 goto end;
2893
2894 case ACT_HTTP_REDIR:
Christopher Faulet3e964192018-10-24 11:39:23 +02002895 rule_ret = HTTP_RULE_RES_DONE;
2896 if (!htx_apply_redirect_rule(rule->arg.redir, s, txn))
2897 rule_ret = HTTP_RULE_RES_BADREQ;
2898 goto end;
2899
2900 case ACT_HTTP_SET_NICE:
2901 s->task->nice = rule->arg.nice;
2902 break;
2903
2904 case ACT_HTTP_SET_TOS:
Willy Tarreau1a18b542018-12-11 16:37:42 +01002905 conn_set_tos(objt_conn(sess->origin), rule->arg.tos);
Christopher Faulet3e964192018-10-24 11:39:23 +02002906 break;
2907
2908 case ACT_HTTP_SET_MARK:
Willy Tarreau1a18b542018-12-11 16:37:42 +01002909 conn_set_mark(objt_conn(sess->origin), rule->arg.mark);
Christopher Faulet3e964192018-10-24 11:39:23 +02002910 break;
2911
2912 case ACT_HTTP_SET_LOGL:
2913 s->logs.level = rule->arg.loglevel;
2914 break;
2915
2916 case ACT_HTTP_REPLACE_HDR:
2917 case ACT_HTTP_REPLACE_VAL:
2918 if (htx_transform_header(s, &s->req, htx,
2919 ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len),
2920 &rule->arg.hdr_add.fmt,
Dragan Dosen26743032019-04-30 15:54:36 +02002921 rule->arg.hdr_add.re, rule->action)) {
Christopher Faulet3e964192018-10-24 11:39:23 +02002922 rule_ret = HTTP_RULE_RES_BADREQ;
2923 goto end;
2924 }
2925 break;
2926
2927 case ACT_HTTP_DEL_HDR:
2928 /* remove all occurrences of the header */
2929 ctx.blk = NULL;
2930 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
2931 http_remove_header(htx, &ctx);
2932 break;
2933
2934 case ACT_HTTP_SET_HDR:
2935 case ACT_HTTP_ADD_HDR: {
2936 /* The scope of the trash buffer must be limited to this function. The
2937 * build_logline() function can execute a lot of other function which
2938 * can use the trash buffer. So for limiting the scope of this global
2939 * buffer, we build first the header value using build_logline, and
2940 * after we store the header name.
2941 */
2942 struct buffer *replace;
2943 struct ist n, v;
2944
2945 replace = alloc_trash_chunk();
2946 if (!replace) {
2947 rule_ret = HTTP_RULE_RES_BADREQ;
2948 goto end;
2949 }
2950
2951 replace->data = build_logline(s, replace->area, replace->size, &rule->arg.hdr_add.fmt);
2952 n = ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len);
2953 v = ist2(replace->area, replace->data);
2954
2955 if (rule->action == ACT_HTTP_SET_HDR) {
2956 /* remove all occurrences of the header */
2957 ctx.blk = NULL;
2958 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
2959 http_remove_header(htx, &ctx);
2960 }
2961
2962 if (!http_add_header(htx, n, v)) {
2963 static unsigned char rate_limit = 0;
2964
2965 if ((rate_limit++ & 255) == 0) {
2966 send_log(px, LOG_WARNING, "Proxy %s failed to add or set the request header '%.*s' for request #%u. You might need to increase tune.maxrewrite.", px->id, (int)n.len, n.ptr, s->uniq_id);
2967 }
2968
Olivier Houcharda798bf52019-03-08 18:52:00 +01002969 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02002970 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +01002971 _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02002972 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01002973 _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02002974 }
2975 free_trash_chunk(replace);
2976 break;
2977 }
2978
2979 case ACT_HTTP_DEL_ACL:
2980 case ACT_HTTP_DEL_MAP: {
2981 struct pat_ref *ref;
2982 struct buffer *key;
2983
2984 /* collect reference */
2985 ref = pat_ref_lookup(rule->arg.map.ref);
2986 if (!ref)
2987 continue;
2988
2989 /* allocate key */
2990 key = alloc_trash_chunk();
2991 if (!key) {
2992 rule_ret = HTTP_RULE_RES_BADREQ;
2993 goto end;
2994 }
2995
2996 /* collect key */
2997 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
2998 key->area[key->data] = '\0';
2999
3000 /* perform update */
3001 /* returned code: 1=ok, 0=ko */
3002 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3003 pat_ref_delete(ref, key->area);
3004 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3005
3006 free_trash_chunk(key);
3007 break;
3008 }
3009
3010 case ACT_HTTP_ADD_ACL: {
3011 struct pat_ref *ref;
3012 struct buffer *key;
3013
3014 /* collect reference */
3015 ref = pat_ref_lookup(rule->arg.map.ref);
3016 if (!ref)
3017 continue;
3018
3019 /* allocate key */
3020 key = alloc_trash_chunk();
3021 if (!key) {
3022 rule_ret = HTTP_RULE_RES_BADREQ;
3023 goto end;
3024 }
3025
3026 /* collect key */
3027 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3028 key->area[key->data] = '\0';
3029
3030 /* perform update */
3031 /* add entry only if it does not already exist */
3032 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3033 if (pat_ref_find_elt(ref, key->area) == NULL)
3034 pat_ref_add(ref, key->area, NULL, NULL);
3035 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3036
3037 free_trash_chunk(key);
3038 break;
3039 }
3040
3041 case ACT_HTTP_SET_MAP: {
3042 struct pat_ref *ref;
3043 struct buffer *key, *value;
3044
3045 /* collect reference */
3046 ref = pat_ref_lookup(rule->arg.map.ref);
3047 if (!ref)
3048 continue;
3049
3050 /* allocate key */
3051 key = alloc_trash_chunk();
3052 if (!key) {
3053 rule_ret = HTTP_RULE_RES_BADREQ;
3054 goto end;
3055 }
3056
3057 /* allocate value */
3058 value = alloc_trash_chunk();
3059 if (!value) {
3060 free_trash_chunk(key);
3061 rule_ret = HTTP_RULE_RES_BADREQ;
3062 goto end;
3063 }
3064
3065 /* collect key */
3066 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3067 key->area[key->data] = '\0';
3068
3069 /* collect value */
3070 value->data = build_logline(s, value->area, value->size, &rule->arg.map.value);
3071 value->area[value->data] = '\0';
3072
3073 /* perform update */
Christopher Faulete84289e2019-04-19 14:50:55 +02003074 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003075 if (pat_ref_find_elt(ref, key->area) != NULL)
3076 /* update entry if it exists */
3077 pat_ref_set(ref, key->area, value->area, NULL);
3078 else
3079 /* insert a new entry */
3080 pat_ref_add(ref, key->area, value->area, NULL);
Christopher Faulete84289e2019-04-19 14:50:55 +02003081 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003082 free_trash_chunk(key);
3083 free_trash_chunk(value);
3084 break;
3085 }
3086
3087 case ACT_HTTP_EARLY_HINT:
3088 if (!(txn->req.flags & HTTP_MSGF_VER_11))
3089 break;
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01003090 early_hints = htx_add_early_hint_header(s, early_hints,
3091 ist2(rule->arg.early_hint.name, rule->arg.early_hint.name_len),
Christopher Faulet3e964192018-10-24 11:39:23 +02003092 &rule->arg.early_hint.fmt);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01003093 if (early_hints == -1) {
3094 rule_ret = HTTP_RULE_RES_BADREQ;
Christopher Faulet3e964192018-10-24 11:39:23 +02003095 goto end;
3096 }
3097 break;
3098
3099 case ACT_CUSTOM:
3100 if ((s->req.flags & CF_READ_ERROR) ||
3101 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
Christopher Faulet3e964192018-10-24 11:39:23 +02003102 (px->options & PR_O_ABRT_CLOSE)))
3103 act_flags |= ACT_FLAG_FINAL;
3104
3105 switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) {
3106 case ACT_RET_ERR:
3107 case ACT_RET_CONT:
3108 break;
3109 case ACT_RET_STOP:
3110 rule_ret = HTTP_RULE_RES_DONE;
3111 goto end;
3112 case ACT_RET_YIELD:
3113 s->current_rule = rule;
3114 rule_ret = HTTP_RULE_RES_YIELD;
3115 goto end;
3116 }
3117 break;
3118
3119 case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX:
3120 /* Note: only the first valid tracking parameter of each
3121 * applies.
3122 */
3123
3124 if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) {
3125 struct stktable *t;
3126 struct stksess *ts;
3127 struct stktable_key *key;
3128 void *ptr1, *ptr2;
3129
3130 t = rule->arg.trk_ctr.table.t;
3131 key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
3132 rule->arg.trk_ctr.expr, NULL);
3133
3134 if (key && (ts = stktable_get_entry(t, key))) {
3135 stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts);
3136
3137 /* let's count a new HTTP request as it's the first time we do it */
3138 ptr1 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT);
3139 ptr2 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE);
3140 if (ptr1 || ptr2) {
3141 HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
3142
3143 if (ptr1)
3144 stktable_data_cast(ptr1, http_req_cnt)++;
3145
3146 if (ptr2)
3147 update_freq_ctr_period(&stktable_data_cast(ptr2, http_req_rate),
3148 t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1);
3149
3150 HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
3151
3152 /* If data was modified, we need to touch to re-schedule sync */
3153 stktable_touch_local(t, ts, 0);
3154 }
3155
3156 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
3157 if (sess->fe != s->be)
3158 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
3159 }
3160 }
3161 break;
3162
Joseph Herlantc42c0e92018-11-25 10:43:27 -08003163 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003164 default:
3165 break;
3166 }
3167 }
3168
3169 end:
3170 if (early_hints) {
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01003171 if (htx_reply_103_early_hints(&s->res) == -1)
3172 rule_ret = HTTP_RULE_RES_BADREQ;
Christopher Faulet3e964192018-10-24 11:39:23 +02003173 }
3174
3175 /* we reached the end of the rules, nothing to report */
3176 return rule_ret;
3177}
3178
3179/* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
3180 * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
3181 * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
3182 * is returned, the process can continue the evaluation of next rule list. If
3183 * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
3184 * is returned, it means the operation could not be processed and a server error
3185 * must be returned. It may set the TX_SVDENY on txn->flags if it encounters a
3186 * deny rule. If *YIELD is returned, the caller must call again the function
3187 * with the same context.
3188 */
3189static enum rule_result htx_res_get_intercept_rule(struct proxy *px, struct list *rules,
3190 struct stream *s)
3191{
3192 struct session *sess = strm_sess(s);
3193 struct http_txn *txn = s->txn;
3194 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02003195 struct act_rule *rule;
3196 struct http_hdr_ctx ctx;
3197 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
3198 int act_flags = 0;
3199
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003200 htx = htxbuf(&s->res.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02003201
3202 /* If "the current_rule_list" match the executed rule list, we are in
3203 * resume condition. If a resume is needed it is always in the action
3204 * and never in the ACL or converters. In this case, we initialise the
3205 * current rule, and go to the action execution point.
3206 */
3207 if (s->current_rule) {
3208 rule = s->current_rule;
3209 s->current_rule = NULL;
3210 if (s->current_rule_list == rules)
3211 goto resume_execution;
3212 }
3213 s->current_rule_list = rules;
3214
3215 list_for_each_entry(rule, rules, list) {
3216 /* check optional condition */
3217 if (rule->cond) {
3218 int ret;
3219
3220 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
3221 ret = acl_pass(ret);
3222
3223 if (rule->cond->pol == ACL_COND_UNLESS)
3224 ret = !ret;
3225
3226 if (!ret) /* condition not matched */
3227 continue;
3228 }
3229
3230 act_flags |= ACT_FLAG_FIRST;
3231resume_execution:
3232 switch (rule->action) {
3233 case ACT_ACTION_ALLOW:
3234 rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
3235 goto end;
3236
3237 case ACT_ACTION_DENY:
3238 txn->flags |= TX_SVDENY;
3239 rule_ret = HTTP_RULE_RES_STOP;
3240 goto end;
3241
3242 case ACT_HTTP_SET_NICE:
3243 s->task->nice = rule->arg.nice;
3244 break;
3245
3246 case ACT_HTTP_SET_TOS:
Willy Tarreau1a18b542018-12-11 16:37:42 +01003247 conn_set_tos(objt_conn(sess->origin), rule->arg.tos);
Christopher Faulet3e964192018-10-24 11:39:23 +02003248 break;
3249
3250 case ACT_HTTP_SET_MARK:
Willy Tarreau1a18b542018-12-11 16:37:42 +01003251 conn_set_mark(objt_conn(sess->origin), rule->arg.mark);
Christopher Faulet3e964192018-10-24 11:39:23 +02003252 break;
3253
3254 case ACT_HTTP_SET_LOGL:
3255 s->logs.level = rule->arg.loglevel;
3256 break;
3257
3258 case ACT_HTTP_REPLACE_HDR:
3259 case ACT_HTTP_REPLACE_VAL:
3260 if (htx_transform_header(s, &s->res, htx,
3261 ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len),
3262 &rule->arg.hdr_add.fmt,
Dragan Dosen26743032019-04-30 15:54:36 +02003263 rule->arg.hdr_add.re, rule->action)) {
Christopher Faulet3e964192018-10-24 11:39:23 +02003264 rule_ret = HTTP_RULE_RES_BADREQ;
3265 goto end;
3266 }
3267 break;
3268
3269 case ACT_HTTP_DEL_HDR:
3270 /* remove all occurrences of the header */
3271 ctx.blk = NULL;
3272 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
3273 http_remove_header(htx, &ctx);
3274 break;
3275
3276 case ACT_HTTP_SET_HDR:
3277 case ACT_HTTP_ADD_HDR: {
3278 struct buffer *replace;
3279 struct ist n, v;
3280
3281 replace = alloc_trash_chunk();
3282 if (!replace) {
3283 rule_ret = HTTP_RULE_RES_BADREQ;
3284 goto end;
3285 }
3286
3287 replace->data = build_logline(s, replace->area, replace->size, &rule->arg.hdr_add.fmt);
3288 n = ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len);
3289 v = ist2(replace->area, replace->data);
3290
3291 if (rule->action == ACT_HTTP_SET_HDR) {
3292 /* remove all occurrences of the header */
3293 ctx.blk = NULL;
3294 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
3295 http_remove_header(htx, &ctx);
3296 }
3297
3298 if (!http_add_header(htx, n, v)) {
3299 static unsigned char rate_limit = 0;
3300
3301 if ((rate_limit++ & 255) == 0) {
3302 send_log(px, LOG_WARNING, "Proxy %s failed to add or set the response header '%.*s' for request #%u. You might need to increase tune.maxrewrite.", px->id, (int)n.len, n.ptr, s->uniq_id);
3303 }
3304
Olivier Houcharda798bf52019-03-08 18:52:00 +01003305 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003306 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +01003307 _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003308 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01003309 _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003310 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01003311 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003312 }
3313 free_trash_chunk(replace);
3314 break;
3315 }
3316
3317 case ACT_HTTP_DEL_ACL:
3318 case ACT_HTTP_DEL_MAP: {
3319 struct pat_ref *ref;
3320 struct buffer *key;
3321
3322 /* collect reference */
3323 ref = pat_ref_lookup(rule->arg.map.ref);
3324 if (!ref)
3325 continue;
3326
3327 /* allocate key */
3328 key = alloc_trash_chunk();
3329 if (!key) {
3330 rule_ret = HTTP_RULE_RES_BADREQ;
3331 goto end;
3332 }
3333
3334 /* collect key */
3335 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3336 key->area[key->data] = '\0';
3337
3338 /* perform update */
3339 /* returned code: 1=ok, 0=ko */
3340 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3341 pat_ref_delete(ref, key->area);
3342 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3343
3344 free_trash_chunk(key);
3345 break;
3346 }
3347
3348 case ACT_HTTP_ADD_ACL: {
3349 struct pat_ref *ref;
3350 struct buffer *key;
3351
3352 /* collect reference */
3353 ref = pat_ref_lookup(rule->arg.map.ref);
3354 if (!ref)
3355 continue;
3356
3357 /* allocate key */
3358 key = alloc_trash_chunk();
3359 if (!key) {
3360 rule_ret = HTTP_RULE_RES_BADREQ;
3361 goto end;
3362 }
3363
3364 /* collect key */
3365 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3366 key->area[key->data] = '\0';
3367
3368 /* perform update */
3369 /* check if the entry already exists */
Christopher Faulete84289e2019-04-19 14:50:55 +02003370 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003371 if (pat_ref_find_elt(ref, key->area) == NULL)
3372 pat_ref_add(ref, key->area, NULL, NULL);
Christopher Faulete84289e2019-04-19 14:50:55 +02003373 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003374 free_trash_chunk(key);
3375 break;
3376 }
3377
3378 case ACT_HTTP_SET_MAP: {
3379 struct pat_ref *ref;
3380 struct buffer *key, *value;
3381
3382 /* collect reference */
3383 ref = pat_ref_lookup(rule->arg.map.ref);
3384 if (!ref)
3385 continue;
3386
3387 /* allocate key */
3388 key = alloc_trash_chunk();
3389 if (!key) {
3390 rule_ret = HTTP_RULE_RES_BADREQ;
3391 goto end;
3392 }
3393
3394 /* allocate value */
3395 value = alloc_trash_chunk();
3396 if (!value) {
3397 free_trash_chunk(key);
3398 rule_ret = HTTP_RULE_RES_BADREQ;
3399 goto end;
3400 }
3401
3402 /* collect key */
3403 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3404 key->area[key->data] = '\0';
3405
3406 /* collect value */
3407 value->data = build_logline(s, value->area, value->size, &rule->arg.map.value);
3408 value->area[value->data] = '\0';
3409
3410 /* perform update */
3411 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3412 if (pat_ref_find_elt(ref, key->area) != NULL)
3413 /* update entry if it exists */
3414 pat_ref_set(ref, key->area, value->area, NULL);
3415 else
3416 /* insert a new entry */
3417 pat_ref_add(ref, key->area, value->area, NULL);
3418 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3419 free_trash_chunk(key);
3420 free_trash_chunk(value);
3421 break;
3422 }
3423
3424 case ACT_HTTP_REDIR:
3425 rule_ret = HTTP_RULE_RES_DONE;
3426 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
3427 rule_ret = HTTP_RULE_RES_BADREQ;
3428 goto end;
3429
3430 case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX:
3431 /* Note: only the first valid tracking parameter of each
3432 * applies.
3433 */
3434 if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) {
3435 struct stktable *t;
3436 struct stksess *ts;
3437 struct stktable_key *key;
3438 void *ptr;
3439
3440 t = rule->arg.trk_ctr.table.t;
3441 key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_RES | SMP_OPT_FINAL,
3442 rule->arg.trk_ctr.expr, NULL);
3443
3444 if (key && (ts = stktable_get_entry(t, key))) {
3445 stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts);
3446
3447 HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
3448
3449 /* let's count a new HTTP request as it's the first time we do it */
3450 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT);
3451 if (ptr)
3452 stktable_data_cast(ptr, http_req_cnt)++;
3453
3454 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE);
3455 if (ptr)
3456 update_freq_ctr_period(&stktable_data_cast(ptr, http_req_rate),
3457 t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1);
3458
3459 /* When the client triggers a 4xx from the server, it's most often due
3460 * to a missing object or permission. These events should be tracked
3461 * because if they happen often, it may indicate a brute force or a
3462 * vulnerability scan. Normally this is done when receiving the response
3463 * but here we're tracking after this ought to have been done so we have
3464 * to do it on purpose.
3465 */
3466 if ((unsigned)(txn->status - 400) < 100) {
3467 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_CNT);
3468 if (ptr)
3469 stktable_data_cast(ptr, http_err_cnt)++;
3470
3471 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_RATE);
3472 if (ptr)
3473 update_freq_ctr_period(&stktable_data_cast(ptr, http_err_rate),
3474 t->data_arg[STKTABLE_DT_HTTP_ERR_RATE].u, 1);
3475 }
3476
3477 HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
3478
3479 /* If data was modified, we need to touch to re-schedule sync */
3480 stktable_touch_local(t, ts, 0);
3481
3482 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
3483 if (sess->fe != s->be)
3484 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
3485 }
3486 }
3487 break;
3488
3489 case ACT_CUSTOM:
3490 if ((s->req.flags & CF_READ_ERROR) ||
3491 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
Christopher Faulet3e964192018-10-24 11:39:23 +02003492 (px->options & PR_O_ABRT_CLOSE)))
3493 act_flags |= ACT_FLAG_FINAL;
3494
3495 switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) {
3496 case ACT_RET_ERR:
3497 case ACT_RET_CONT:
3498 break;
3499 case ACT_RET_STOP:
3500 rule_ret = HTTP_RULE_RES_STOP;
3501 goto end;
3502 case ACT_RET_YIELD:
3503 s->current_rule = rule;
3504 rule_ret = HTTP_RULE_RES_YIELD;
3505 goto end;
3506 }
3507 break;
3508
Joseph Herlantc42c0e92018-11-25 10:43:27 -08003509 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003510 default:
3511 break;
3512 }
3513 }
3514
3515 end:
3516 /* we reached the end of the rules, nothing to report */
3517 return rule_ret;
3518}
3519
Christopher Faulet33640082018-10-24 11:53:01 +02003520/* Iterate the same filter through all request headers.
3521 * Returns 1 if this filter can be stopped upon return, otherwise 0.
3522 * Since it can manage the switch to another backend, it updates the per-proxy
3523 * DENY stats.
3524 */
3525static int htx_apply_filter_to_req_headers(struct stream *s, struct channel *req, struct hdr_exp *exp)
3526{
3527 struct http_txn *txn = s->txn;
3528 struct htx *htx;
3529 struct buffer *hdr = get_trash_chunk();
3530 int32_t pos;
3531
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003532 htx = htxbuf(&req->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003533
Christopher Fauleta3f15502019-05-13 15:27:23 +02003534 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet33640082018-10-24 11:53:01 +02003535 struct htx_blk *blk = htx_get_blk(htx, pos);
3536 enum htx_blk_type type;
3537 struct ist n, v;
3538
3539 next_hdr:
3540 type = htx_get_blk_type(blk);
3541 if (type == HTX_BLK_EOH)
3542 break;
3543 if (type != HTX_BLK_HDR)
3544 continue;
3545
3546 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
3547 return 1;
3548 else if (unlikely(txn->flags & TX_CLALLOW) &&
3549 (exp->action == ACT_ALLOW ||
3550 exp->action == ACT_DENY ||
3551 exp->action == ACT_TARPIT))
3552 return 0;
3553
3554 n = htx_get_blk_name(htx, blk);
3555 v = htx_get_blk_value(htx, blk);
3556
Christopher Faulet02e771a2019-02-26 15:36:05 +01003557 chunk_memcpy(hdr, n.ptr, n.len);
Christopher Faulet33640082018-10-24 11:53:01 +02003558 hdr->area[hdr->data++] = ':';
3559 hdr->area[hdr->data++] = ' ';
3560 chunk_memcat(hdr, v.ptr, v.len);
3561
3562 /* Now we have one header in <hdr> */
3563
3564 if (regex_exec_match2(exp->preg, hdr->area, hdr->data, MAX_MATCH, pmatch, 0)) {
3565 struct http_hdr_ctx ctx;
3566 int len;
3567
3568 switch (exp->action) {
3569 case ACT_ALLOW:
3570 txn->flags |= TX_CLALLOW;
3571 goto end;
3572
3573 case ACT_DENY:
3574 txn->flags |= TX_CLDENY;
3575 goto end;
3576
3577 case ACT_TARPIT:
3578 txn->flags |= TX_CLTARPIT;
3579 goto end;
3580
3581 case ACT_REPLACE:
3582 len = exp_replace(trash.area, trash.size, hdr->area, exp->replace, pmatch);
3583 if (len < 0)
3584 return -1;
3585
3586 http_parse_header(ist2(trash.area, len), &n, &v);
3587 ctx.blk = blk;
3588 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003589 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003590 if (!http_replace_header(htx, &ctx, n, v))
3591 return -1;
3592 if (!ctx.blk)
3593 goto end;
3594 pos = htx_get_blk_pos(htx, blk);
3595 break;
3596
3597 case ACT_REMOVE:
3598 ctx.blk = blk;
3599 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003600 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003601 if (!http_remove_header(htx, &ctx))
3602 return -1;
3603 if (!ctx.blk)
3604 goto end;
3605 pos = htx_get_blk_pos(htx, blk);
3606 goto next_hdr;
3607
3608 }
3609 }
3610 }
3611 end:
3612 return 0;
3613}
3614
3615/* Apply the filter to the request line.
3616 * Returns 0 if nothing has been done, 1 if the filter has been applied,
3617 * or -1 if a replacement resulted in an invalid request line.
3618 * Since it can manage the switch to another backend, it updates the per-proxy
3619 * DENY stats.
3620 */
3621static int htx_apply_filter_to_req_line(struct stream *s, struct channel *req, struct hdr_exp *exp)
3622{
3623 struct http_txn *txn = s->txn;
3624 struct htx *htx;
3625 struct buffer *reqline = get_trash_chunk();
3626 int done;
3627
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003628 htx = htxbuf(&req->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003629
3630 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
3631 return 1;
3632 else if (unlikely(txn->flags & TX_CLALLOW) &&
3633 (exp->action == ACT_ALLOW ||
3634 exp->action == ACT_DENY ||
3635 exp->action == ACT_TARPIT))
3636 return 0;
3637 else if (exp->action == ACT_REMOVE)
3638 return 0;
3639
3640 done = 0;
3641
Christopher Faulet297fbb42019-05-13 14:41:27 +02003642 reqline->data = htx_fmt_req_line(http_get_stline(htx), reqline->area, reqline->size);
Christopher Faulet33640082018-10-24 11:53:01 +02003643
3644 /* Now we have the request line between cur_ptr and cur_end */
3645 if (regex_exec_match2(exp->preg, reqline->area, reqline->data, MAX_MATCH, pmatch, 0)) {
Christopher Faulet297fbb42019-05-13 14:41:27 +02003646 struct htx_sl *sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003647 struct ist meth, uri, vsn;
Christopher Faulet33640082018-10-24 11:53:01 +02003648 int len;
3649
3650 switch (exp->action) {
3651 case ACT_ALLOW:
3652 txn->flags |= TX_CLALLOW;
3653 done = 1;
3654 break;
3655
3656 case ACT_DENY:
3657 txn->flags |= TX_CLDENY;
3658 done = 1;
3659 break;
3660
3661 case ACT_TARPIT:
3662 txn->flags |= TX_CLTARPIT;
3663 done = 1;
3664 break;
3665
3666 case ACT_REPLACE:
3667 len = exp_replace(trash.area, trash.size, reqline->area, exp->replace, pmatch);
3668 if (len < 0)
3669 return -1;
3670
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003671 http_parse_stline(ist2(trash.area, len), &meth, &uri, &vsn);
3672 sl->info.req.meth = find_http_meth(meth.ptr, meth.len);
3673 if (!http_replace_stline(htx, meth, uri, vsn))
Christopher Faulet33640082018-10-24 11:53:01 +02003674 return -1;
3675 done = 1;
3676 break;
3677 }
3678 }
3679 return done;
3680}
3681
3682/*
3683 * Apply all the req filters of proxy <px> to all headers in buffer <req> of stream <s>.
3684 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
3685 * unparsable request. Since it can manage the switch to another backend, it
3686 * updates the per-proxy DENY stats.
3687 */
3688static int htx_apply_filters_to_request(struct stream *s, struct channel *req, struct proxy *px)
3689{
3690 struct session *sess = s->sess;
3691 struct http_txn *txn = s->txn;
3692 struct hdr_exp *exp;
3693
3694 for (exp = px->req_exp; exp; exp = exp->next) {
3695 int ret;
3696
3697 /*
3698 * The interleaving of transformations and verdicts
3699 * makes it difficult to decide to continue or stop
3700 * the evaluation.
3701 */
3702
3703 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
3704 break;
3705
3706 if ((txn->flags & TX_CLALLOW) &&
3707 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
3708 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
3709 continue;
3710
3711 /* if this filter had a condition, evaluate it now and skip to
3712 * next filter if the condition does not match.
3713 */
3714 if (exp->cond) {
3715 ret = acl_exec_cond(exp->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
3716 ret = acl_pass(ret);
3717 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
3718 ret = !ret;
3719
3720 if (!ret)
3721 continue;
3722 }
3723
3724 /* Apply the filter to the request line. */
3725 ret = htx_apply_filter_to_req_line(s, req, exp);
3726 if (unlikely(ret < 0))
3727 return -1;
3728
3729 if (likely(ret == 0)) {
3730 /* The filter did not match the request, it can be
3731 * iterated through all headers.
3732 */
3733 if (unlikely(htx_apply_filter_to_req_headers(s, req, exp) < 0))
3734 return -1;
3735 }
3736 }
3737 return 0;
3738}
3739
3740/* Iterate the same filter through all response headers contained in <res>.
3741 * Returns 1 if this filter can be stopped upon return, otherwise 0.
3742 */
3743static int htx_apply_filter_to_resp_headers(struct stream *s, struct channel *res, struct hdr_exp *exp)
3744{
3745 struct http_txn *txn = s->txn;
3746 struct htx *htx;
3747 struct buffer *hdr = get_trash_chunk();
3748 int32_t pos;
3749
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003750 htx = htxbuf(&res->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003751
Christopher Fauleta3f15502019-05-13 15:27:23 +02003752 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet33640082018-10-24 11:53:01 +02003753 struct htx_blk *blk = htx_get_blk(htx, pos);
3754 enum htx_blk_type type;
3755 struct ist n, v;
3756
3757 next_hdr:
3758 type = htx_get_blk_type(blk);
3759 if (type == HTX_BLK_EOH)
3760 break;
3761 if (type != HTX_BLK_HDR)
3762 continue;
3763
3764 if (unlikely(txn->flags & TX_SVDENY))
3765 return 1;
3766 else if (unlikely(txn->flags & TX_SVALLOW) &&
3767 (exp->action == ACT_ALLOW ||
3768 exp->action == ACT_DENY))
3769 return 0;
3770
3771 n = htx_get_blk_name(htx, blk);
3772 v = htx_get_blk_value(htx, blk);
3773
Christopher Faulet02e771a2019-02-26 15:36:05 +01003774 chunk_memcpy(hdr, n.ptr, n.len);
Christopher Faulet33640082018-10-24 11:53:01 +02003775 hdr->area[hdr->data++] = ':';
3776 hdr->area[hdr->data++] = ' ';
3777 chunk_memcat(hdr, v.ptr, v.len);
3778
3779 /* Now we have one header in <hdr> */
3780
3781 if (regex_exec_match2(exp->preg, hdr->area, hdr->data, MAX_MATCH, pmatch, 0)) {
3782 struct http_hdr_ctx ctx;
3783 int len;
3784
3785 switch (exp->action) {
3786 case ACT_ALLOW:
3787 txn->flags |= TX_SVALLOW;
3788 goto end;
3789 break;
3790
3791 case ACT_DENY:
3792 txn->flags |= TX_SVDENY;
3793 goto end;
3794 break;
3795
3796 case ACT_REPLACE:
3797 len = exp_replace(trash.area, trash.size, hdr->area, exp->replace, pmatch);
3798 if (len < 0)
3799 return -1;
3800
3801 http_parse_header(ist2(trash.area, len), &n, &v);
3802 ctx.blk = blk;
3803 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003804 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003805 if (!http_replace_header(htx, &ctx, n, v))
3806 return -1;
3807 if (!ctx.blk)
3808 goto end;
3809 pos = htx_get_blk_pos(htx, blk);
3810 break;
3811
3812 case ACT_REMOVE:
3813 ctx.blk = blk;
3814 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003815 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003816 if (!http_remove_header(htx, &ctx))
3817 return -1;
3818 if (!ctx.blk)
3819 goto end;
3820 pos = htx_get_blk_pos(htx, blk);
3821 goto next_hdr;
3822 }
3823 }
3824
3825 }
3826 end:
3827 return 0;
3828}
3829
3830/* Apply the filter to the status line in the response buffer <res>.
3831 * Returns 0 if nothing has been done, 1 if the filter has been applied,
3832 * or -1 if a replacement resulted in an invalid status line.
3833 */
3834static int htx_apply_filter_to_sts_line(struct stream *s, struct channel *res, struct hdr_exp *exp)
3835{
3836 struct http_txn *txn = s->txn;
3837 struct htx *htx;
3838 struct buffer *resline = get_trash_chunk();
3839 int done;
3840
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003841 htx = htxbuf(&res->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003842
3843 if (unlikely(txn->flags & TX_SVDENY))
3844 return 1;
3845 else if (unlikely(txn->flags & TX_SVALLOW) &&
3846 (exp->action == ACT_ALLOW ||
3847 exp->action == ACT_DENY))
3848 return 0;
3849 else if (exp->action == ACT_REMOVE)
3850 return 0;
3851
3852 done = 0;
Christopher Faulet297fbb42019-05-13 14:41:27 +02003853 resline->data = htx_fmt_res_line(http_get_stline(htx), resline->area, resline->size);
Christopher Faulet33640082018-10-24 11:53:01 +02003854
3855 /* Now we have the status line between cur_ptr and cur_end */
3856 if (regex_exec_match2(exp->preg, resline->area, resline->data, MAX_MATCH, pmatch, 0)) {
Christopher Faulet297fbb42019-05-13 14:41:27 +02003857 struct htx_sl *sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003858 struct ist vsn, code, reason;
Christopher Faulet33640082018-10-24 11:53:01 +02003859 int len;
3860
3861 switch (exp->action) {
3862 case ACT_ALLOW:
3863 txn->flags |= TX_SVALLOW;
3864 done = 1;
3865 break;
3866
3867 case ACT_DENY:
3868 txn->flags |= TX_SVDENY;
3869 done = 1;
3870 break;
3871
3872 case ACT_REPLACE:
3873 len = exp_replace(trash.area, trash.size, resline->area, exp->replace, pmatch);
3874 if (len < 0)
3875 return -1;
3876
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003877 http_parse_stline(ist2(trash.area, len), &vsn, &code, &reason);
3878 sl->info.res.status = strl2ui(code.ptr, code.len);
3879 if (!http_replace_stline(htx, vsn, code, reason))
Christopher Faulet33640082018-10-24 11:53:01 +02003880 return -1;
3881
3882 done = 1;
3883 return 1;
3884 }
3885 }
3886 return done;
3887}
3888
3889/*
3890 * Apply all the resp filters of proxy <px> to all headers in buffer <res> of stream <s>.
3891 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
3892 * unparsable response.
3893 */
3894static int htx_apply_filters_to_response(struct stream *s, struct channel *res, struct proxy *px)
3895{
3896 struct session *sess = s->sess;
3897 struct http_txn *txn = s->txn;
3898 struct hdr_exp *exp;
3899
3900 for (exp = px->rsp_exp; exp; exp = exp->next) {
3901 int ret;
3902
3903 /*
3904 * The interleaving of transformations and verdicts
3905 * makes it difficult to decide to continue or stop
3906 * the evaluation.
3907 */
3908
3909 if (txn->flags & TX_SVDENY)
3910 break;
3911
3912 if ((txn->flags & TX_SVALLOW) &&
3913 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
3914 exp->action == ACT_PASS)) {
3915 exp = exp->next;
3916 continue;
3917 }
3918
3919 /* if this filter had a condition, evaluate it now and skip to
3920 * next filter if the condition does not match.
3921 */
3922 if (exp->cond) {
3923 ret = acl_exec_cond(exp->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
3924 ret = acl_pass(ret);
3925 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
3926 ret = !ret;
3927 if (!ret)
3928 continue;
3929 }
3930
3931 /* Apply the filter to the status line. */
3932 ret = htx_apply_filter_to_sts_line(s, res, exp);
3933 if (unlikely(ret < 0))
3934 return -1;
3935
3936 if (likely(ret == 0)) {
3937 /* The filter did not match the response, it can be
3938 * iterated through all headers.
3939 */
3940 if (unlikely(htx_apply_filter_to_resp_headers(s, res, exp) < 0))
3941 return -1;
3942 }
3943 }
3944 return 0;
3945}
3946
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003947/*
3948 * Manage client-side cookie. It can impact performance by about 2% so it is
3949 * desirable to call it only when needed. This code is quite complex because
3950 * of the multiple very crappy and ambiguous syntaxes we have to support. it
3951 * highly recommended not to touch this part without a good reason !
3952 */
3953static void htx_manage_client_side_cookies(struct stream *s, struct channel *req)
3954{
3955 struct session *sess = s->sess;
3956 struct http_txn *txn = s->txn;
3957 struct htx *htx;
3958 struct http_hdr_ctx ctx;
3959 char *hdr_beg, *hdr_end, *del_from;
3960 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
3961 int preserve_hdr;
3962
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003963 htx = htxbuf(&req->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003964 ctx.blk = NULL;
3965 while (http_find_header(htx, ist("Cookie"), &ctx, 1)) {
3966 del_from = NULL; /* nothing to be deleted */
3967 preserve_hdr = 0; /* assume we may kill the whole header */
3968
3969 /* Now look for cookies. Conforming to RFC2109, we have to support
3970 * attributes whose name begin with a '$', and associate them with
3971 * the right cookie, if we want to delete this cookie.
3972 * So there are 3 cases for each cookie read :
3973 * 1) it's a special attribute, beginning with a '$' : ignore it.
3974 * 2) it's a server id cookie that we *MAY* want to delete : save
3975 * some pointers on it (last semi-colon, beginning of cookie...)
3976 * 3) it's an application cookie : we *MAY* have to delete a previous
3977 * "special" cookie.
3978 * At the end of loop, if a "special" cookie remains, we may have to
3979 * remove it. If no application cookie persists in the header, we
3980 * *MUST* delete it.
3981 *
3982 * Note: RFC2965 is unclear about the processing of spaces around
3983 * the equal sign in the ATTR=VALUE form. A careful inspection of
3984 * the RFC explicitly allows spaces before it, and not within the
3985 * tokens (attrs or values). An inspection of RFC2109 allows that
3986 * too but section 10.1.3 lets one think that spaces may be allowed
3987 * after the equal sign too, resulting in some (rare) buggy
3988 * implementations trying to do that. So let's do what servers do.
3989 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
3990 * allowed quoted strings in values, with any possible character
3991 * after a backslash, including control chars and delimitors, which
3992 * causes parsing to become ambiguous. Browsers also allow spaces
3993 * within values even without quotes.
3994 *
3995 * We have to keep multiple pointers in order to support cookie
3996 * removal at the beginning, middle or end of header without
3997 * corrupting the header. All of these headers are valid :
3998 *
3999 * hdr_beg hdr_end
4000 * | |
4001 * v |
4002 * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 |
4003 * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v
4004 * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3
4005 * | | | | | | |
4006 * | | | | | | |
4007 * | | | | | | +--> next
4008 * | | | | | +----> val_end
4009 * | | | | +-----------> val_beg
4010 * | | | +--------------> equal
4011 * | | +----------------> att_end
4012 * | +---------------------> att_beg
4013 * +--------------------------> prev
4014 *
4015 */
4016 hdr_beg = ctx.value.ptr;
4017 hdr_end = hdr_beg + ctx.value.len;
4018 for (prev = hdr_beg; prev < hdr_end; prev = next) {
4019 /* Iterate through all cookies on this line */
4020
4021 /* find att_beg */
4022 att_beg = prev;
4023 if (prev > hdr_beg)
4024 att_beg++;
4025
4026 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
4027 att_beg++;
4028
4029 /* find att_end : this is the first character after the last non
4030 * space before the equal. It may be equal to hdr_end.
4031 */
4032 equal = att_end = att_beg;
4033 while (equal < hdr_end) {
4034 if (*equal == '=' || *equal == ',' || *equal == ';')
4035 break;
4036 if (HTTP_IS_SPHT(*equal++))
4037 continue;
4038 att_end = equal;
4039 }
4040
4041 /* here, <equal> points to '=', a delimitor or the end. <att_end>
4042 * is between <att_beg> and <equal>, both may be identical.
4043 */
4044 /* look for end of cookie if there is an equal sign */
4045 if (equal < hdr_end && *equal == '=') {
4046 /* look for the beginning of the value */
4047 val_beg = equal + 1;
4048 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
4049 val_beg++;
4050
4051 /* find the end of the value, respecting quotes */
4052 next = http_find_cookie_value_end(val_beg, hdr_end);
4053
4054 /* make val_end point to the first white space or delimitor after the value */
4055 val_end = next;
4056 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
4057 val_end--;
4058 }
4059 else
4060 val_beg = val_end = next = equal;
4061
4062 /* We have nothing to do with attributes beginning with
4063 * '$'. However, they will automatically be removed if a
4064 * header before them is removed, since they're supposed
4065 * to be linked together.
4066 */
4067 if (*att_beg == '$')
4068 continue;
4069
4070 /* Ignore cookies with no equal sign */
4071 if (equal == next) {
4072 /* This is not our cookie, so we must preserve it. But if we already
4073 * scheduled another cookie for removal, we cannot remove the
4074 * complete header, but we can remove the previous block itself.
4075 */
4076 preserve_hdr = 1;
4077 if (del_from != NULL) {
4078 int delta = htx_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
4079 val_end += delta;
4080 next += delta;
4081 hdr_end += delta;
4082 prev = del_from;
4083 del_from = NULL;
4084 }
4085 continue;
4086 }
4087
4088 /* if there are spaces around the equal sign, we need to
4089 * strip them otherwise we'll get trouble for cookie captures,
4090 * or even for rewrites. Since this happens extremely rarely,
4091 * it does not hurt performance.
4092 */
4093 if (unlikely(att_end != equal || val_beg > equal + 1)) {
4094 int stripped_before = 0;
4095 int stripped_after = 0;
4096
4097 if (att_end != equal) {
4098 memmove(att_end, equal, hdr_end - equal);
4099 stripped_before = (att_end - equal);
4100 equal += stripped_before;
4101 val_beg += stripped_before;
4102 }
4103
4104 if (val_beg > equal + 1) {
4105 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
4106 stripped_after = (equal + 1) - val_beg;
4107 val_beg += stripped_after;
4108 stripped_before += stripped_after;
4109 }
4110
4111 val_end += stripped_before;
4112 next += stripped_before;
4113 hdr_end += stripped_before;
4114 }
4115 /* now everything is as on the diagram above */
4116
4117 /* First, let's see if we want to capture this cookie. We check
4118 * that we don't already have a client side cookie, because we
4119 * can only capture one. Also as an optimisation, we ignore
4120 * cookies shorter than the declared name.
4121 */
4122 if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
4123 (val_end - att_beg >= sess->fe->capture_namelen) &&
4124 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
4125 int log_len = val_end - att_beg;
4126
4127 if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
4128 ha_alert("HTTP logging : out of memory.\n");
4129 } else {
4130 if (log_len > sess->fe->capture_len)
4131 log_len = sess->fe->capture_len;
4132 memcpy(txn->cli_cookie, att_beg, log_len);
4133 txn->cli_cookie[log_len] = 0;
4134 }
4135 }
4136
4137 /* Persistence cookies in passive, rewrite or insert mode have the
4138 * following form :
4139 *
4140 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
4141 *
4142 * For cookies in prefix mode, the form is :
4143 *
4144 * Cookie: NAME=SRV~VALUE
4145 */
4146 if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
4147 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
4148 struct server *srv = s->be->srv;
4149 char *delim;
4150
4151 /* if we're in cookie prefix mode, we'll search the delimitor so that we
4152 * have the server ID between val_beg and delim, and the original cookie between
4153 * delim+1 and val_end. Otherwise, delim==val_end :
4154 *
4155 * hdr_beg
4156 * |
4157 * v
4158 * NAME=SRV; # in all but prefix modes
4159 * NAME=SRV~OPAQUE ; # in prefix mode
4160 * || || | |+-> next
4161 * || || | +--> val_end
4162 * || || +---------> delim
4163 * || |+------------> val_beg
4164 * || +-------------> att_end = equal
4165 * |+-----------------> att_beg
4166 * +------------------> prev
4167 *
4168 */
4169 if (s->be->ck_opts & PR_CK_PFX) {
4170 for (delim = val_beg; delim < val_end; delim++)
4171 if (*delim == COOKIE_DELIM)
4172 break;
4173 }
4174 else {
4175 char *vbar1;
4176 delim = val_end;
4177 /* Now check if the cookie contains a date field, which would
4178 * appear after a vertical bar ('|') just after the server name
4179 * and before the delimiter.
4180 */
4181 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
4182 if (vbar1) {
4183 /* OK, so left of the bar is the server's cookie and
4184 * right is the last seen date. It is a base64 encoded
4185 * 30-bit value representing the UNIX date since the
4186 * epoch in 4-second quantities.
4187 */
4188 int val;
4189 delim = vbar1++;
4190 if (val_end - vbar1 >= 5) {
4191 val = b64tos30(vbar1);
4192 if (val > 0)
4193 txn->cookie_last_date = val << 2;
4194 }
4195 /* look for a second vertical bar */
4196 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
4197 if (vbar1 && (val_end - vbar1 > 5)) {
4198 val = b64tos30(vbar1 + 1);
4199 if (val > 0)
4200 txn->cookie_first_date = val << 2;
4201 }
4202 }
4203 }
4204
4205 /* if the cookie has an expiration date and the proxy wants to check
4206 * it, then we do that now. We first check if the cookie is too old,
4207 * then only if it has expired. We detect strict overflow because the
4208 * time resolution here is not great (4 seconds). Cookies with dates
4209 * in the future are ignored if their offset is beyond one day. This
4210 * allows an admin to fix timezone issues without expiring everyone
4211 * and at the same time avoids keeping unwanted side effects for too
4212 * long.
4213 */
4214 if (txn->cookie_first_date && s->be->cookie_maxlife &&
4215 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
4216 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
4217 txn->flags &= ~TX_CK_MASK;
4218 txn->flags |= TX_CK_OLD;
4219 delim = val_beg; // let's pretend we have not found the cookie
4220 txn->cookie_first_date = 0;
4221 txn->cookie_last_date = 0;
4222 }
4223 else if (txn->cookie_last_date && s->be->cookie_maxidle &&
4224 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
4225 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
4226 txn->flags &= ~TX_CK_MASK;
4227 txn->flags |= TX_CK_EXPIRED;
4228 delim = val_beg; // let's pretend we have not found the cookie
4229 txn->cookie_first_date = 0;
4230 txn->cookie_last_date = 0;
4231 }
4232
4233 /* Here, we'll look for the first running server which supports the cookie.
4234 * This allows to share a same cookie between several servers, for example
4235 * to dedicate backup servers to specific servers only.
4236 * However, to prevent clients from sticking to cookie-less backup server
4237 * when they have incidentely learned an empty cookie, we simply ignore
4238 * empty cookies and mark them as invalid.
4239 * The same behaviour is applied when persistence must be ignored.
4240 */
4241 if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
4242 srv = NULL;
4243
4244 while (srv) {
4245 if (srv->cookie && (srv->cklen == delim - val_beg) &&
4246 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
4247 if ((srv->cur_state != SRV_ST_STOPPED) ||
4248 (s->be->options & PR_O_PERSIST) ||
4249 (s->flags & SF_FORCE_PRST)) {
4250 /* we found the server and we can use it */
4251 txn->flags &= ~TX_CK_MASK;
4252 txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
4253 s->flags |= SF_DIRECT | SF_ASSIGNED;
4254 s->target = &srv->obj_type;
4255 break;
4256 } else {
4257 /* we found a server, but it's down,
4258 * mark it as such and go on in case
4259 * another one is available.
4260 */
4261 txn->flags &= ~TX_CK_MASK;
4262 txn->flags |= TX_CK_DOWN;
4263 }
4264 }
4265 srv = srv->next;
4266 }
4267
4268 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
4269 /* no server matched this cookie or we deliberately skipped it */
4270 txn->flags &= ~TX_CK_MASK;
4271 if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
4272 txn->flags |= TX_CK_UNUSED;
4273 else
4274 txn->flags |= TX_CK_INVALID;
4275 }
4276
4277 /* depending on the cookie mode, we may have to either :
4278 * - delete the complete cookie if we're in insert+indirect mode, so that
4279 * the server never sees it ;
4280 * - remove the server id from the cookie value, and tag the cookie as an
Joseph Herlante9d5c722018-11-25 11:00:25 -08004281 * application cookie so that it does not get accidentally removed later,
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004282 * if we're in cookie prefix mode
4283 */
4284 if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
4285 int delta; /* negative */
4286
4287 memmove(val_beg, delim + 1, hdr_end - (delim + 1));
4288 delta = val_beg - (delim + 1);
4289 val_end += delta;
4290 next += delta;
4291 hdr_end += delta;
4292 del_from = NULL;
4293 preserve_hdr = 1; /* we want to keep this cookie */
4294 }
4295 else if (del_from == NULL &&
4296 (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
4297 del_from = prev;
4298 }
4299 }
4300 else {
4301 /* This is not our cookie, so we must preserve it. But if we already
4302 * scheduled another cookie for removal, we cannot remove the
4303 * complete header, but we can remove the previous block itself.
4304 */
4305 preserve_hdr = 1;
4306
4307 if (del_from != NULL) {
4308 int delta = htx_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
4309 if (att_beg >= del_from)
4310 att_beg += delta;
4311 if (att_end >= del_from)
4312 att_end += delta;
4313 val_beg += delta;
4314 val_end += delta;
4315 next += delta;
4316 hdr_end += delta;
4317 prev = del_from;
4318 del_from = NULL;
4319 }
4320 }
4321
4322 /* continue with next cookie on this header line */
4323 att_beg = next;
4324 } /* for each cookie */
4325
4326
4327 /* There are no more cookies on this line.
4328 * We may still have one (or several) marked for deletion at the
4329 * end of the line. We must do this now in two ways :
4330 * - if some cookies must be preserved, we only delete from the
4331 * mark to the end of line ;
4332 * - if nothing needs to be preserved, simply delete the whole header
4333 */
4334 if (del_from) {
4335 hdr_end = (preserve_hdr ? del_from : hdr_beg);
4336 }
4337 if ((hdr_end - hdr_beg) != ctx.value.len) {
4338 if (hdr_beg != hdr_end) {
4339 htx_set_blk_value_len(ctx.blk, hdr_end - hdr_beg);
Christopher Faulet6cdaf2a2019-02-12 14:29:57 +01004340 htx->data -= ctx.value.len - (hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004341 }
4342 else
4343 http_remove_header(htx, &ctx);
4344 }
4345 } /* for each "Cookie header */
4346}
4347
4348/*
4349 * Manage server-side cookies. It can impact performance by about 2% so it is
4350 * desirable to call it only when needed. This function is also used when we
4351 * just need to know if there is a cookie (eg: for check-cache).
4352 */
4353static void htx_manage_server_side_cookies(struct stream *s, struct channel *res)
4354{
4355 struct session *sess = s->sess;
4356 struct http_txn *txn = s->txn;
4357 struct htx *htx;
4358 struct http_hdr_ctx ctx;
4359 struct server *srv;
4360 char *hdr_beg, *hdr_end;
4361 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau6f7a02a2019-04-15 21:49:49 +02004362 int is_cookie2 = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004363
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004364 htx = htxbuf(&res->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004365
4366 ctx.blk = NULL;
4367 while (1) {
4368 if (!http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) {
4369 if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1))
4370 break;
4371 is_cookie2 = 1;
4372 }
4373
4374 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
4375 * <prev> points to the colon.
4376 */
4377 txn->flags |= TX_SCK_PRESENT;
4378
4379 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
4380 * check-cache is enabled) and we are not interested in checking
4381 * them. Warning, the cookie capture is declared in the frontend.
4382 */
4383 if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
4384 break;
4385
4386 /* OK so now we know we have to process this response cookie.
4387 * The format of the Set-Cookie header is slightly different
4388 * from the format of the Cookie header in that it does not
4389 * support the comma as a cookie delimiter (thus the header
4390 * cannot be folded) because the Expires attribute described in
4391 * the original Netscape's spec may contain an unquoted date
4392 * with a comma inside. We have to live with this because
4393 * many browsers don't support Max-Age and some browsers don't
4394 * support quoted strings. However the Set-Cookie2 header is
4395 * clean.
4396 *
4397 * We have to keep multiple pointers in order to support cookie
4398 * removal at the beginning, middle or end of header without
4399 * corrupting the header (in case of set-cookie2). A special
4400 * pointer, <scav> points to the beginning of the set-cookie-av
4401 * fields after the first semi-colon. The <next> pointer points
4402 * either to the end of line (set-cookie) or next unquoted comma
4403 * (set-cookie2). All of these headers are valid :
4404 *
4405 * hdr_beg hdr_end
4406 * | |
4407 * v |
4408 * NAME1 = VALUE 1 ; Secure; Path="/" |
4409 * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v
4410 * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT
4411 * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard
4412 * | | | | | | | |
4413 * | | | | | | | +-> next
4414 * | | | | | | +------------> scav
4415 * | | | | | +--------------> val_end
4416 * | | | | +--------------------> val_beg
4417 * | | | +----------------------> equal
4418 * | | +------------------------> att_end
4419 * | +----------------------------> att_beg
4420 * +------------------------------> prev
4421 * -------------------------------> hdr_beg
4422 */
4423 hdr_beg = ctx.value.ptr;
4424 hdr_end = hdr_beg + ctx.value.len;
4425 for (prev = hdr_beg; prev < hdr_end; prev = next) {
4426
4427 /* Iterate through all cookies on this line */
4428
4429 /* find att_beg */
4430 att_beg = prev;
4431 if (prev > hdr_beg)
4432 att_beg++;
4433
4434 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
4435 att_beg++;
4436
4437 /* find att_end : this is the first character after the last non
4438 * space before the equal. It may be equal to hdr_end.
4439 */
4440 equal = att_end = att_beg;
4441
4442 while (equal < hdr_end) {
4443 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
4444 break;
4445 if (HTTP_IS_SPHT(*equal++))
4446 continue;
4447 att_end = equal;
4448 }
4449
4450 /* here, <equal> points to '=', a delimitor or the end. <att_end>
4451 * is between <att_beg> and <equal>, both may be identical.
4452 */
4453
4454 /* look for end of cookie if there is an equal sign */
4455 if (equal < hdr_end && *equal == '=') {
4456 /* look for the beginning of the value */
4457 val_beg = equal + 1;
4458 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
4459 val_beg++;
4460
4461 /* find the end of the value, respecting quotes */
4462 next = http_find_cookie_value_end(val_beg, hdr_end);
4463
4464 /* make val_end point to the first white space or delimitor after the value */
4465 val_end = next;
4466 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
4467 val_end--;
4468 }
4469 else {
4470 /* <equal> points to next comma, semi-colon or EOL */
4471 val_beg = val_end = next = equal;
4472 }
4473
4474 if (next < hdr_end) {
4475 /* Set-Cookie2 supports multiple cookies, and <next> points to
4476 * a colon or semi-colon before the end. So skip all attr-value
4477 * pairs and look for the next comma. For Set-Cookie, since
4478 * commas are permitted in values, skip to the end.
4479 */
4480 if (is_cookie2)
4481 next = http_find_hdr_value_end(next, hdr_end);
4482 else
4483 next = hdr_end;
4484 }
4485
4486 /* Now everything is as on the diagram above */
4487
4488 /* Ignore cookies with no equal sign */
4489 if (equal == val_end)
4490 continue;
4491
4492 /* If there are spaces around the equal sign, we need to
4493 * strip them otherwise we'll get trouble for cookie captures,
4494 * or even for rewrites. Since this happens extremely rarely,
4495 * it does not hurt performance.
4496 */
4497 if (unlikely(att_end != equal || val_beg > equal + 1)) {
4498 int stripped_before = 0;
4499 int stripped_after = 0;
4500
4501 if (att_end != equal) {
4502 memmove(att_end, equal, hdr_end - equal);
4503 stripped_before = (att_end - equal);
4504 equal += stripped_before;
4505 val_beg += stripped_before;
4506 }
4507
4508 if (val_beg > equal + 1) {
4509 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
4510 stripped_after = (equal + 1) - val_beg;
4511 val_beg += stripped_after;
4512 stripped_before += stripped_after;
4513 }
4514
4515 val_end += stripped_before;
4516 next += stripped_before;
4517 hdr_end += stripped_before;
4518
Christopher Faulet6cdaf2a2019-02-12 14:29:57 +01004519 htx_set_blk_value_len(ctx.blk, hdr_end - hdr_beg);
4520 htx->data -= ctx.value.len - (hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004521 ctx.value.len = hdr_end - hdr_beg;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004522 }
4523
4524 /* First, let's see if we want to capture this cookie. We check
4525 * that we don't already have a server side cookie, because we
4526 * can only capture one. Also as an optimisation, we ignore
4527 * cookies shorter than the declared name.
4528 */
4529 if (sess->fe->capture_name != NULL &&
4530 txn->srv_cookie == NULL &&
4531 (val_end - att_beg >= sess->fe->capture_namelen) &&
4532 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
4533 int log_len = val_end - att_beg;
4534 if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
4535 ha_alert("HTTP logging : out of memory.\n");
4536 }
4537 else {
4538 if (log_len > sess->fe->capture_len)
4539 log_len = sess->fe->capture_len;
4540 memcpy(txn->srv_cookie, att_beg, log_len);
4541 txn->srv_cookie[log_len] = 0;
4542 }
4543 }
4544
4545 srv = objt_server(s->target);
4546 /* now check if we need to process it for persistence */
4547 if (!(s->flags & SF_IGNORE_PRST) &&
4548 (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
4549 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
4550 /* assume passive cookie by default */
4551 txn->flags &= ~TX_SCK_MASK;
4552 txn->flags |= TX_SCK_FOUND;
4553
4554 /* If the cookie is in insert mode on a known server, we'll delete
4555 * this occurrence because we'll insert another one later.
4556 * We'll delete it too if the "indirect" option is set and we're in
4557 * a direct access.
4558 */
4559 if (s->be->ck_opts & PR_CK_PSV) {
4560 /* The "preserve" flag was set, we don't want to touch the
4561 * server's cookie.
4562 */
4563 }
4564 else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
4565 ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
4566 /* this cookie must be deleted */
4567 if (prev == hdr_beg && next == hdr_end) {
4568 /* whole header */
4569 http_remove_header(htx, &ctx);
4570 /* note: while both invalid now, <next> and <hdr_end>
4571 * are still equal, so the for() will stop as expected.
4572 */
4573 } else {
4574 /* just remove the value */
4575 int delta = htx_del_hdr_value(hdr_beg, hdr_end, &prev, next);
4576 next = prev;
4577 hdr_end += delta;
4578 }
4579 txn->flags &= ~TX_SCK_MASK;
4580 txn->flags |= TX_SCK_DELETED;
4581 /* and go on with next cookie */
4582 }
4583 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
4584 /* replace bytes val_beg->val_end with the cookie name associated
4585 * with this server since we know it.
4586 */
4587 int sliding, delta;
4588
4589 ctx.value = ist2(val_beg, val_end - val_beg);
4590 ctx.lws_before = ctx.lws_after = 0;
4591 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen));
4592 delta = srv->cklen - (val_end - val_beg);
4593 sliding = (ctx.value.ptr - val_beg);
4594 hdr_beg += sliding;
4595 val_beg += sliding;
4596 next += sliding + delta;
4597 hdr_end += sliding + delta;
4598
4599 txn->flags &= ~TX_SCK_MASK;
4600 txn->flags |= TX_SCK_REPLACED;
4601 }
4602 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
4603 /* insert the cookie name associated with this server
4604 * before existing cookie, and insert a delimiter between them..
4605 */
4606 int sliding, delta;
4607 ctx.value = ist2(val_beg, 0);
4608 ctx.lws_before = ctx.lws_after = 0;
4609 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1));
4610 delta = srv->cklen + 1;
4611 sliding = (ctx.value.ptr - val_beg);
4612 hdr_beg += sliding;
4613 val_beg += sliding;
4614 next += sliding + delta;
4615 hdr_end += sliding + delta;
4616
4617 val_beg[srv->cklen] = COOKIE_DELIM;
4618 txn->flags &= ~TX_SCK_MASK;
4619 txn->flags |= TX_SCK_REPLACED;
4620 }
4621 }
4622 /* that's done for this cookie, check the next one on the same
4623 * line when next != hdr_end (only if is_cookie2).
4624 */
4625 }
4626 }
4627}
4628
Christopher Faulet25a02f62018-10-24 12:00:25 +02004629/*
4630 * Parses the Cache-Control and Pragma request header fields to determine if
4631 * the request may be served from the cache and/or if it is cacheable. Updates
4632 * s->txn->flags.
4633 */
4634void htx_check_request_for_cacheability(struct stream *s, struct channel *req)
4635{
4636 struct http_txn *txn = s->txn;
4637 struct htx *htx;
4638 int32_t pos;
4639 int pragma_found, cc_found, i;
4640
4641 if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
4642 return; /* nothing more to do here */
4643
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004644 htx = htxbuf(&req->buf);
Christopher Faulet25a02f62018-10-24 12:00:25 +02004645 pragma_found = cc_found = 0;
Christopher Fauleta3f15502019-05-13 15:27:23 +02004646 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004647 struct htx_blk *blk = htx_get_blk(htx, pos);
4648 enum htx_blk_type type = htx_get_blk_type(blk);
4649 struct ist n, v;
4650
4651 if (type == HTX_BLK_EOH)
4652 break;
4653 if (type != HTX_BLK_HDR)
4654 continue;
4655
4656 n = htx_get_blk_name(htx, blk);
4657 v = htx_get_blk_value(htx, blk);
4658
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004659 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004660 if (v.len >= 8 && strncasecmp(v.ptr, "no-cache", 8) == 0) {
4661 pragma_found = 1;
4662 continue;
4663 }
4664 }
4665
4666 /* Don't use the cache and don't try to store if we found the
4667 * Authorization header */
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004668 if (isteq(n, ist("authorization"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004669 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4670 txn->flags |= TX_CACHE_IGNORE;
4671 continue;
4672 }
4673
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004674 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02004675 continue;
4676
4677 /* OK, right now we know we have a cache-control header */
4678 cc_found = 1;
4679 if (!v.len) /* no info */
4680 continue;
4681
4682 i = 0;
4683 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
4684 !isspace((unsigned char)*(v.ptr+i)))
4685 i++;
4686
4687 /* we have a complete value between v.ptr and (v.ptr+i). We don't check the
4688 * values after max-age, max-stale nor min-fresh, we simply don't
4689 * use the cache when they're specified.
4690 */
4691 if (((i == 7) && strncasecmp(v.ptr, "max-age", 7) == 0) ||
4692 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
4693 ((i == 9) && strncasecmp(v.ptr, "max-stale", 9) == 0) ||
4694 ((i == 9) && strncasecmp(v.ptr, "min-fresh", 9) == 0)) {
4695 txn->flags |= TX_CACHE_IGNORE;
4696 continue;
4697 }
4698
4699 if ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0) {
4700 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4701 continue;
4702 }
4703 }
4704
4705 /* RFC7234#5.4:
4706 * When the Cache-Control header field is also present and
4707 * understood in a request, Pragma is ignored.
4708 * When the Cache-Control header field is not present in a
4709 * request, caches MUST consider the no-cache request
4710 * pragma-directive as having the same effect as if
4711 * "Cache-Control: no-cache" were present.
4712 */
4713 if (!cc_found && pragma_found)
4714 txn->flags |= TX_CACHE_IGNORE;
4715}
4716
4717/*
4718 * Check if response is cacheable or not. Updates s->txn->flags.
4719 */
4720void htx_check_response_for_cacheability(struct stream *s, struct channel *res)
4721{
4722 struct http_txn *txn = s->txn;
4723 struct htx *htx;
4724 int32_t pos;
4725 int i;
4726
4727 if (txn->status < 200) {
4728 /* do not try to cache interim responses! */
4729 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4730 return;
4731 }
4732
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004733 htx = htxbuf(&res->buf);
Christopher Fauleta3f15502019-05-13 15:27:23 +02004734 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004735 struct htx_blk *blk = htx_get_blk(htx, pos);
4736 enum htx_blk_type type = htx_get_blk_type(blk);
4737 struct ist n, v;
4738
4739 if (type == HTX_BLK_EOH)
4740 break;
4741 if (type != HTX_BLK_HDR)
4742 continue;
4743
4744 n = htx_get_blk_name(htx, blk);
4745 v = htx_get_blk_value(htx, blk);
4746
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004747 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004748 if ((v.len >= 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) {
4749 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4750 return;
4751 }
4752 }
4753
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004754 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02004755 continue;
4756
4757 /* OK, right now we know we have a cache-control header */
4758 if (!v.len) /* no info */
4759 continue;
4760
4761 i = 0;
4762 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
4763 !isspace((unsigned char)*(v.ptr+i)))
4764 i++;
4765
4766 /* we have a complete value between v.ptr and (v.ptr+i) */
4767 if (i < v.len && *(v.ptr + i) == '=') {
4768 if (((v.len - i) > 1 && (i == 7) && strncasecmp(v.ptr, "max-age=0", 9) == 0) ||
4769 ((v.len - i) > 1 && (i == 8) && strncasecmp(v.ptr, "s-maxage=0", 10) == 0)) {
4770 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4771 continue;
4772 }
4773
4774 /* we have something of the form no-cache="set-cookie" */
4775 if ((v.len >= 21) &&
4776 strncasecmp(v.ptr, "no-cache=\"set-cookie", 20) == 0
4777 && (*(v.ptr + 20) == '"' || *(v.ptr + 20 ) == ','))
4778 txn->flags &= ~TX_CACHE_COOK;
4779 continue;
4780 }
4781
4782 /* OK, so we know that either p2 points to the end of string or to a comma */
4783 if (((i == 7) && strncasecmp(v.ptr, "private", 7) == 0) ||
4784 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
4785 ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0)) {
4786 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4787 return;
4788 }
4789
4790 if ((i == 6) && strncasecmp(v.ptr, "public", 6) == 0) {
4791 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4792 continue;
4793 }
4794 }
4795}
4796
Christopher Faulet64159df2018-10-24 21:15:35 +02004797/* send a server's name with an outgoing request over an established connection.
4798 * Note: this function is designed to be called once the request has been
4799 * scheduled for being forwarded. This is the reason why the number of forwarded
4800 * bytes have to be adjusted.
4801 */
4802int htx_send_name_header(struct stream *s, struct proxy *be, const char *srv_name)
4803{
4804 struct htx *htx;
4805 struct http_hdr_ctx ctx;
4806 struct ist hdr;
4807 uint32_t data;
4808
4809 hdr = ist2(be->server_id_hdr_name, be->server_id_hdr_len);
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004810 htx = htxbuf(&s->req.buf);
Christopher Faulet64159df2018-10-24 21:15:35 +02004811 data = htx->data;
4812
4813 ctx.blk = NULL;
4814 while (http_find_header(htx, hdr, &ctx, 1))
4815 http_remove_header(htx, &ctx);
4816 http_add_header(htx, hdr, ist2(srv_name, strlen(srv_name)));
4817
4818 if (co_data(&s->req)) {
4819 if (data >= htx->data)
4820 c_rew(&s->req, data - htx->data);
4821 else
4822 c_adv(&s->req, htx->data - data);
4823 }
4824 return 0;
4825}
4826
Christopher Faulet377c5a52018-10-24 21:21:30 +02004827/*
4828 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
4829 * for the current backend.
4830 *
4831 * It is assumed that the request is either a HEAD, GET, or POST and that the
4832 * uri_auth field is valid.
4833 *
4834 * Returns 1 if stats should be provided, otherwise 0.
4835 */
4836static int htx_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend)
4837{
4838 struct uri_auth *uri_auth = backend->uri_auth;
4839 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004840 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004841 struct ist uri;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004842
4843 if (!uri_auth)
4844 return 0;
4845
4846 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
4847 return 0;
4848
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004849 htx = htxbuf(&s->req.buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004850 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004851 uri = htx_sl_req_uri(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004852
4853 /* check URI size */
4854 if (uri_auth->uri_len > uri.len)
4855 return 0;
4856
4857 if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
4858 return 0;
4859
4860 return 1;
4861}
4862
4863/* This function prepares an applet to handle the stats. It can deal with the
4864 * "100-continue" expectation, check that admin rules are met for POST requests,
4865 * and program a response message if something was unexpected. It cannot fail
4866 * and always relies on the stats applet to complete the job. It does not touch
4867 * analysers nor counters, which are left to the caller. It does not touch
4868 * s->target which is supposed to already point to the stats applet. The caller
4869 * is expected to have already assigned an appctx to the stream.
4870 */
4871static int htx_handle_stats(struct stream *s, struct channel *req)
4872{
4873 struct stats_admin_rule *stats_admin_rule;
4874 struct stream_interface *si = &s->si[1];
4875 struct session *sess = s->sess;
4876 struct http_txn *txn = s->txn;
4877 struct http_msg *msg = &txn->req;
4878 struct uri_auth *uri_auth = s->be->uri_auth;
4879 const char *h, *lookup, *end;
4880 struct appctx *appctx;
4881 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004882 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004883
4884 appctx = si_appctx(si);
4885 memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
4886 appctx->st1 = appctx->st2 = 0;
4887 appctx->ctx.stats.st_code = STAT_STATUS_INIT;
4888 appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
4889 if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD))
4890 appctx->ctx.stats.flags |= STAT_CHUNKED;
4891
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004892 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004893 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004894 lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len;
4895 end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004896
4897 for (h = lookup; h <= end - 3; h++) {
4898 if (memcmp(h, ";up", 3) == 0) {
4899 appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
4900 break;
4901 }
4902 }
4903
4904 if (uri_auth->refresh) {
4905 for (h = lookup; h <= end - 10; h++) {
4906 if (memcmp(h, ";norefresh", 10) == 0) {
4907 appctx->ctx.stats.flags |= STAT_NO_REFRESH;
4908 break;
4909 }
4910 }
4911 }
4912
4913 for (h = lookup; h <= end - 4; h++) {
4914 if (memcmp(h, ";csv", 4) == 0) {
4915 appctx->ctx.stats.flags &= ~STAT_FMT_HTML;
4916 break;
4917 }
4918 }
4919
4920 for (h = lookup; h <= end - 6; h++) {
4921 if (memcmp(h, ";typed", 6) == 0) {
4922 appctx->ctx.stats.flags &= ~STAT_FMT_HTML;
4923 appctx->ctx.stats.flags |= STAT_FMT_TYPED;
4924 break;
4925 }
4926 }
4927
4928 for (h = lookup; h <= end - 8; h++) {
4929 if (memcmp(h, ";st=", 4) == 0) {
4930 int i;
4931 h += 4;
4932 appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
4933 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
4934 if (strncmp(stat_status_codes[i], h, 4) == 0) {
4935 appctx->ctx.stats.st_code = i;
4936 break;
4937 }
4938 }
4939 break;
4940 }
4941 }
4942
4943 appctx->ctx.stats.scope_str = 0;
4944 appctx->ctx.stats.scope_len = 0;
4945 for (h = lookup; h <= end - 8; h++) {
4946 if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
4947 int itx = 0;
4948 const char *h2;
4949 char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
4950 const char *err;
4951
4952 h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
4953 h2 = h;
Christopher Fauleted7a0662019-01-14 11:07:34 +01004954 appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl);
4955 while (h < end) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02004956 if (*h == ';' || *h == '&' || *h == ' ')
4957 break;
4958 itx++;
4959 h++;
4960 }
4961
4962 if (itx > STAT_SCOPE_TXT_MAXLEN)
4963 itx = STAT_SCOPE_TXT_MAXLEN;
4964 appctx->ctx.stats.scope_len = itx;
4965
4966 /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
4967 memcpy(scope_txt, h2, itx);
4968 scope_txt[itx] = '\0';
4969 err = invalid_char(scope_txt);
4970 if (err) {
4971 /* bad char in search text => clear scope */
4972 appctx->ctx.stats.scope_str = 0;
4973 appctx->ctx.stats.scope_len = 0;
4974 }
4975 break;
4976 }
4977 }
4978
4979 /* now check whether we have some admin rules for this request */
4980 list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
4981 int ret = 1;
4982
4983 if (stats_admin_rule->cond) {
4984 ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
4985 ret = acl_pass(ret);
4986 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
4987 ret = !ret;
4988 }
4989
4990 if (ret) {
4991 /* no rule, or the rule matches */
4992 appctx->ctx.stats.flags |= STAT_ADMIN;
4993 break;
4994 }
4995 }
4996
Christopher Faulet5d45e382019-02-27 15:15:23 +01004997 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
4998 appctx->st0 = STAT_HTTP_HEAD;
4999 else if (txn->meth == HTTP_METH_POST) {
Christopher Fauletbcf242a2019-03-01 11:36:26 +01005000 if (appctx->ctx.stats.flags & STAT_ADMIN)
Christopher Faulet377c5a52018-10-24 21:21:30 +02005001 appctx->st0 = STAT_HTTP_POST;
Christopher Faulet377c5a52018-10-24 21:21:30 +02005002 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01005003 /* POST without admin level */
Christopher Faulet377c5a52018-10-24 21:21:30 +02005004 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
5005 appctx->ctx.stats.st_code = STAT_STATUS_DENY;
5006 appctx->st0 = STAT_HTTP_LAST;
5007 }
5008 }
5009 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01005010 /* Unsupported method */
5011 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
5012 appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
5013 appctx->st0 = STAT_HTTP_LAST;
Christopher Faulet377c5a52018-10-24 21:21:30 +02005014 }
5015
5016 s->task->nice = -32; /* small boost for HTTP statistics */
5017 return 1;
5018}
5019
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005020void htx_perform_server_redirect(struct stream *s, struct stream_interface *si)
5021{
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005022 struct channel *req = &s->req;
5023 struct channel *res = &s->res;
5024 struct server *srv;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005025 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005026 struct htx_sl *sl;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005027 struct ist path, location;
5028 unsigned int flags;
5029 size_t data;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005030
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005031 /*
5032 * Create the location
5033 */
5034 chunk_reset(&trash);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005035
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005036 /* 1: add the server's prefix */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005037 /* special prefix "/" means don't change URL */
5038 srv = __objt_server(s->target);
5039 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
5040 if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len))
5041 return;
5042 }
5043
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005044 /* 2: add the request Path */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005045 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02005046 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005047 path = http_get_path(htx_sl_req_uri(sl));
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005048 if (!path.ptr)
5049 return;
5050
5051 if (!chunk_memcat(&trash, path.ptr, path.len))
5052 return;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005053 location = ist2(trash.area, trash.data);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005054
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005055 /*
5056 * Create the 302 respone
5057 */
5058 htx = htx_from_buf(&res->buf);
5059 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
5060 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
5061 ist("HTTP/1.1"), ist("302"), ist("Found"));
5062 if (!sl)
5063 goto fail;
5064 sl->info.res.status = 302;
5065 s->txn->status = 302;
5066
5067 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
5068 !htx_add_header(htx, ist("Connection"), ist("close")) ||
5069 !htx_add_header(htx, ist("Content-length"), ist("0")) ||
5070 !htx_add_header(htx, ist("Location"), location))
5071 goto fail;
5072
5073 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
5074 goto fail;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005075
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005076 /*
5077 * Send the message
5078 */
5079 data = htx->data - co_data(res);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005080 c_adv(res, data);
5081 res->total += data;
5082
5083 /* return without error. */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005084 si_shutr(si);
5085 si_shutw(si);
5086 si->err_type = SI_ET_NONE;
5087 si->state = SI_ST_CLO;
5088
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005089 channel_auto_read(req);
5090 channel_abort(req);
5091 channel_auto_close(req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005092 channel_htx_erase(req, htxbuf(&req->buf));
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005093 channel_auto_read(res);
5094 channel_auto_close(res);
5095
5096 if (!(s->flags & SF_ERR_MASK))
5097 s->flags |= SF_ERR_LOCAL;
5098 if (!(s->flags & SF_FINST_MASK))
5099 s->flags |= SF_FINST_C;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005100
5101 /* FIXME: we should increase a counter of redirects per server and per backend. */
5102 srv_inc_sess_ctr(srv);
5103 srv_set_sess_last(srv);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005104 return;
5105
5106 fail:
5107 /* If an error occurred, remove the incomplete HTTP response from the
5108 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005109 channel_htx_truncate(res, htx);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005110}
5111
Christopher Fauletf2824e62018-10-01 12:12:37 +02005112/* This function terminates the request because it was completly analyzed or
5113 * because an error was triggered during the body forwarding.
5114 */
5115static void htx_end_request(struct stream *s)
5116{
5117 struct channel *chn = &s->req;
5118 struct http_txn *txn = s->txn;
5119
5120 DPRINTF(stderr,"[%u] %s: stream=%p states=%s,%s req->analysers=0x%08x res->analysers=0x%08x\n",
5121 now_ms, __FUNCTION__, s,
5122 h1_msg_state_str(txn->req.msg_state), h1_msg_state_str(txn->rsp.msg_state),
5123 s->req.analysers, s->res.analysers);
5124
Christopher Fauletb42a8b62018-11-19 21:59:00 +01005125 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
5126 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02005127 channel_abort(chn);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005128 channel_htx_truncate(chn, htxbuf(&chn->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02005129 goto end;
5130 }
5131
5132 if (unlikely(txn->req.msg_state < HTTP_MSG_DONE))
5133 return;
5134
5135 if (txn->req.msg_state == HTTP_MSG_DONE) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02005136 /* No need to read anymore, the request was completely parsed.
5137 * We can shut the read side unless we want to abort_on_close,
5138 * or we have a POST request. The issue with POST requests is
5139 * that some browsers still send a CRLF after the request, and
5140 * this CRLF must be read so that it does not remain in the kernel
5141 * buffers, otherwise a close could cause an RST on some systems
5142 * (eg: Linux).
5143 */
Christopher Faulet769d0e92019-03-22 14:23:18 +01005144 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Christopher Fauletf2824e62018-10-01 12:12:37 +02005145 channel_dont_read(chn);
5146
5147 /* if the server closes the connection, we want to immediately react
5148 * and close the socket to save packets and syscalls.
5149 */
5150 s->si[1].flags |= SI_FL_NOHALF;
5151
5152 /* In any case we've finished parsing the request so we must
5153 * disable Nagle when sending data because 1) we're not going
5154 * to shut this side, and 2) the server is waiting for us to
5155 * send pending data.
5156 */
5157 chn->flags |= CF_NEVER_WAIT;
5158
Christopher Fauletd01ce402019-01-02 17:44:13 +01005159 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
5160 /* The server has not finished to respond, so we
5161 * don't want to move in order not to upset it.
5162 */
5163 return;
5164 }
5165
Christopher Fauletf2824e62018-10-01 12:12:37 +02005166 /* When we get here, it means that both the request and the
5167 * response have finished receiving. Depending on the connection
5168 * mode, we'll have to wait for the last bytes to leave in either
5169 * direction, and sometimes for a close to be effective.
5170 */
5171 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN) {
5172 /* Tunnel mode will not have any analyser so it needs to
5173 * poll for reads.
5174 */
5175 channel_auto_read(chn);
Christopher Faulet9768c262018-10-22 09:34:31 +02005176 if (b_data(&chn->buf))
5177 return;
Christopher Fauletf2824e62018-10-01 12:12:37 +02005178 txn->req.msg_state = HTTP_MSG_TUNNEL;
5179 }
5180 else {
5181 /* we're not expecting any new data to come for this
5182 * transaction, so we can close it.
Christopher Faulet9768c262018-10-22 09:34:31 +02005183 *
5184 * However, there is an exception if the response
5185 * length is undefined. In this case, we need to wait
5186 * the close from the server. The response will be
5187 * switched in TUNNEL mode until the end.
Christopher Fauletf2824e62018-10-01 12:12:37 +02005188 */
5189 if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
5190 txn->rsp.msg_state != HTTP_MSG_CLOSED)
Christopher Faulet9768c262018-10-22 09:34:31 +02005191 goto check_channel_flags;
Christopher Fauletf2824e62018-10-01 12:12:37 +02005192
5193 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
5194 channel_shutr_now(chn);
5195 channel_shutw_now(chn);
5196 }
5197 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02005198 goto check_channel_flags;
5199 }
5200
5201 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
5202 http_msg_closing:
5203 /* nothing else to forward, just waiting for the output buffer
5204 * to be empty and for the shutw_now to take effect.
5205 */
5206 if (channel_is_empty(chn)) {
5207 txn->req.msg_state = HTTP_MSG_CLOSED;
5208 goto http_msg_closed;
5209 }
5210 else if (chn->flags & CF_SHUTW) {
5211 txn->req.err_state = txn->req.msg_state;
5212 txn->req.msg_state = HTTP_MSG_ERROR;
5213 goto end;
5214 }
5215 return;
5216 }
5217
5218 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
5219 http_msg_closed:
Christopher Fauletf2824e62018-10-01 12:12:37 +02005220 /* if we don't know whether the server will close, we need to hard close */
5221 if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
5222 s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
Christopher Fauletf2824e62018-10-01 12:12:37 +02005223 /* see above in MSG_DONE why we only do this in these states */
Christopher Faulet769d0e92019-03-22 14:23:18 +01005224 if (!(s->be->options & PR_O_ABRT_CLOSE))
Christopher Fauletf2824e62018-10-01 12:12:37 +02005225 channel_dont_read(chn);
5226 goto end;
5227 }
5228
5229 check_channel_flags:
5230 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
5231 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
5232 /* if we've just closed an output, let's switch */
5233 txn->req.msg_state = HTTP_MSG_CLOSING;
5234 goto http_msg_closing;
5235 }
5236
5237 end:
5238 chn->analysers &= AN_REQ_FLT_END;
5239 if (txn->req.msg_state == HTTP_MSG_TUNNEL && HAS_REQ_DATA_FILTERS(s))
5240 chn->analysers |= AN_REQ_FLT_XFER_DATA;
5241 channel_auto_close(chn);
5242 channel_auto_read(chn);
5243}
5244
5245
5246/* This function terminates the response because it was completly analyzed or
5247 * because an error was triggered during the body forwarding.
5248 */
5249static void htx_end_response(struct stream *s)
5250{
5251 struct channel *chn = &s->res;
5252 struct http_txn *txn = s->txn;
5253
5254 DPRINTF(stderr,"[%u] %s: stream=%p states=%s,%s req->analysers=0x%08x res->analysers=0x%08x\n",
5255 now_ms, __FUNCTION__, s,
5256 h1_msg_state_str(txn->req.msg_state), h1_msg_state_str(txn->rsp.msg_state),
5257 s->req.analysers, s->res.analysers);
5258
Christopher Fauletb42a8b62018-11-19 21:59:00 +01005259 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
5260 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005261 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02005262 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005263 goto end;
5264 }
5265
5266 if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE))
5267 return;
5268
5269 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
5270 /* In theory, we don't need to read anymore, but we must
5271 * still monitor the server connection for a possible close
5272 * while the request is being uploaded, so we don't disable
5273 * reading.
5274 */
5275 /* channel_dont_read(chn); */
5276
5277 if (txn->req.msg_state < HTTP_MSG_DONE) {
5278 /* The client seems to still be sending data, probably
5279 * because we got an error response during an upload.
5280 * We have the choice of either breaking the connection
5281 * or letting it pass through. Let's do the later.
5282 */
5283 return;
5284 }
5285
5286 /* When we get here, it means that both the request and the
5287 * response have finished receiving. Depending on the connection
5288 * mode, we'll have to wait for the last bytes to leave in either
5289 * direction, and sometimes for a close to be effective.
5290 */
5291 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN) {
5292 channel_auto_read(chn);
5293 chn->flags |= CF_NEVER_WAIT;
Christopher Faulet9768c262018-10-22 09:34:31 +02005294 if (b_data(&chn->buf))
5295 return;
Christopher Fauletf2824e62018-10-01 12:12:37 +02005296 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
5297 }
5298 else {
5299 /* we're not expecting any new data to come for this
5300 * transaction, so we can close it.
5301 */
5302 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
5303 channel_shutr_now(chn);
5304 channel_shutw_now(chn);
5305 }
5306 }
5307 goto check_channel_flags;
5308 }
5309
5310 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
5311 http_msg_closing:
5312 /* nothing else to forward, just waiting for the output buffer
5313 * to be empty and for the shutw_now to take effect.
5314 */
5315 if (channel_is_empty(chn)) {
5316 txn->rsp.msg_state = HTTP_MSG_CLOSED;
5317 goto http_msg_closed;
5318 }
5319 else if (chn->flags & CF_SHUTW) {
5320 txn->rsp.err_state = txn->rsp.msg_state;
5321 txn->rsp.msg_state = HTTP_MSG_ERROR;
Olivier Houcharda798bf52019-03-08 18:52:00 +01005322 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005323 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01005324 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005325 goto end;
5326 }
5327 return;
5328 }
5329
5330 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
5331 http_msg_closed:
5332 /* drop any pending data */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005333 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02005334 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005335 goto end;
5336 }
5337
5338 check_channel_flags:
5339 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
5340 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
5341 /* if we've just closed an output, let's switch */
5342 txn->rsp.msg_state = HTTP_MSG_CLOSING;
5343 goto http_msg_closing;
5344 }
5345
5346 end:
5347 chn->analysers &= AN_RES_FLT_END;
5348 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL && HAS_RSP_DATA_FILTERS(s))
5349 chn->analysers |= AN_RES_FLT_XFER_DATA;
5350 channel_auto_close(chn);
5351 channel_auto_read(chn);
5352}
5353
Christopher Faulet0f226952018-10-22 09:29:56 +02005354void htx_server_error(struct stream *s, struct stream_interface *si, int err,
5355 int finst, const struct buffer *msg)
5356{
5357 channel_auto_read(si_oc(si));
5358 channel_abort(si_oc(si));
5359 channel_auto_close(si_oc(si));
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005360 channel_htx_erase(si_oc(si), htxbuf(&(si_oc(si))->buf));
Christopher Faulet0f226952018-10-22 09:29:56 +02005361 channel_auto_close(si_ic(si));
5362 channel_auto_read(si_ic(si));
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005363
5364 /* <msg> is an HTX structure. So we copy it in the response's
5365 * channel */
Christopher Faulet0f226952018-10-22 09:29:56 +02005366 if (msg) {
5367 struct channel *chn = si_ic(si);
5368 struct htx *htx;
5369
Christopher Fauletaed82cf2018-11-30 22:22:32 +01005370 FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg));
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005371 chn->buf.data = msg->data;
5372 memcpy(chn->buf.area, msg->area, msg->data);
5373 htx = htx_from_buf(&chn->buf);
Christopher Faulet0f226952018-10-22 09:29:56 +02005374 c_adv(chn, htx->data);
5375 chn->total += htx->data;
5376 }
5377 if (!(s->flags & SF_ERR_MASK))
5378 s->flags |= err;
5379 if (!(s->flags & SF_FINST_MASK))
5380 s->flags |= finst;
5381}
5382
5383void htx_reply_and_close(struct stream *s, short status, struct buffer *msg)
5384{
5385 channel_auto_read(&s->req);
5386 channel_abort(&s->req);
5387 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005388 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
5389 channel_htx_truncate(&s->res, htxbuf(&s->res.buf));
Christopher Faulet0f226952018-10-22 09:29:56 +02005390
5391 s->txn->flags &= ~TX_WAIT_NEXT_RQ;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005392
5393 /* <msg> is an HTX structure. So we copy it in the response's
5394 * channel */
5395 /* FIXME: It is a problem for now if there is some outgoing data */
Christopher Faulet0f226952018-10-22 09:29:56 +02005396 if (msg) {
5397 struct channel *chn = &s->res;
5398 struct htx *htx;
5399
Christopher Fauletaed82cf2018-11-30 22:22:32 +01005400 FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg));
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005401 chn->buf.data = msg->data;
5402 memcpy(chn->buf.area, msg->area, msg->data);
5403 htx = htx_from_buf(&chn->buf);
Christopher Faulet0f226952018-10-22 09:29:56 +02005404 c_adv(chn, htx->data);
5405 chn->total += htx->data;
5406 }
5407
5408 s->res.wex = tick_add_ifset(now_ms, s->res.wto);
5409 channel_auto_read(&s->res);
5410 channel_auto_close(&s->res);
5411 channel_shutr_now(&s->res);
5412}
5413
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005414struct buffer *htx_error_message(struct stream *s)
5415{
5416 const int msgnum = http_get_status_idx(s->txn->status);
5417
5418 if (s->be->errmsg[msgnum].area)
5419 return &s->be->errmsg[msgnum];
5420 else if (strm_fe(s)->errmsg[msgnum].area)
5421 return &strm_fe(s)->errmsg[msgnum];
5422 else
5423 return &htx_err_chunks[msgnum];
5424}
5425
5426
Christopher Faulet4a28a532019-03-01 11:19:40 +01005427/* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0
5428 * on success and -1 on error.
5429 */
5430static int htx_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg)
5431{
5432 /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
5433 * then we must send an HTTP/1.1 100 Continue intermediate response.
5434 */
5435 if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
5436 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
5437 struct ist hdr = { .ptr = "Expect", .len = 6 };
5438 struct http_hdr_ctx ctx;
5439
5440 ctx.blk = NULL;
5441 /* Expect is allowed in 1.1, look for it */
5442 if (http_find_header(htx, hdr, &ctx, 0) &&
5443 unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) {
5444 if (htx_reply_100_continue(s) == -1)
5445 return -1;
5446 http_remove_header(htx, &ctx);
5447 }
5448 }
5449 return 0;
5450}
5451
Christopher Faulet23a3c792018-11-28 10:01:23 +01005452/* Send a 100-Continue response to the client. It returns 0 on success and -1
5453 * on error. The response channel is updated accordingly.
5454 */
5455static int htx_reply_100_continue(struct stream *s)
5456{
5457 struct channel *res = &s->res;
5458 struct htx *htx = htx_from_buf(&res->buf);
5459 struct htx_sl *sl;
5460 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
5461 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
5462 size_t data;
5463
5464 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
5465 ist("HTTP/1.1"), ist("100"), ist("Continue"));
5466 if (!sl)
5467 goto fail;
5468 sl->info.res.status = 100;
5469
5470 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
5471 goto fail;
5472
5473 data = htx->data - co_data(res);
Christopher Faulet23a3c792018-11-28 10:01:23 +01005474 c_adv(res, data);
5475 res->total += data;
5476 return 0;
5477
5478 fail:
5479 /* If an error occurred, remove the incomplete HTTP response from the
5480 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005481 channel_htx_truncate(res, htx);
Christopher Faulet23a3c792018-11-28 10:01:23 +01005482 return -1;
5483}
5484
Christopher Faulet12c51e22018-11-28 15:59:42 +01005485
5486/* Send a 401-Unauthorized or 407-Unauthorized response to the client, depending
5487 * ont whether we use a proxy or not. It returns 0 on success and -1 on
5488 * error. The response channel is updated accordingly.
5489 */
5490static int htx_reply_40x_unauthorized(struct stream *s, const char *auth_realm)
5491{
5492 struct channel *res = &s->res;
5493 struct htx *htx = htx_from_buf(&res->buf);
5494 struct htx_sl *sl;
5495 struct ist code, body;
5496 int status;
5497 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11);
5498 size_t data;
5499
5500 if (!(s->txn->flags & TX_USE_PX_CONN)) {
5501 status = 401;
5502 code = ist("401");
5503 body = ist("<html><body><h1>401 Unauthorized</h1>\n"
5504 "You need a valid user and password to access this content.\n"
5505 "</body></html>\n");
5506 }
5507 else {
5508 status = 407;
5509 code = ist("407");
5510 body = ist("<html><body><h1>407 Unauthorized</h1>\n"
5511 "You need a valid user and password to access this content.\n"
5512 "</body></html>\n");
5513 }
5514
5515 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
5516 ist("HTTP/1.1"), code, ist("Unauthorized"));
5517 if (!sl)
5518 goto fail;
5519 sl->info.res.status = status;
5520 s->txn->status = status;
5521
5522 if (chunk_printf(&trash, "Basic realm=\"%s\"", auth_realm) == -1)
5523 goto fail;
5524
5525 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
5526 !htx_add_header(htx, ist("Connection"), ist("close")) ||
Jérôme Magnin86cef232018-12-28 14:49:08 +01005527 !htx_add_header(htx, ist("Content-Type"), ist("text/html")))
5528 goto fail;
5529 if (status == 401 && !htx_add_header(htx, ist("WWW-Authenticate"), ist2(trash.area, trash.data)))
5530 goto fail;
5531 if (status == 407 && !htx_add_header(htx, ist("Proxy-Authenticate"), ist2(trash.area, trash.data)))
Christopher Faulet12c51e22018-11-28 15:59:42 +01005532 goto fail;
Christopher Faulet12c51e22018-11-28 15:59:42 +01005533 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_data(htx, body) || !htx_add_endof(htx, HTX_BLK_EOM))
5534 goto fail;
5535
5536 data = htx->data - co_data(res);
Christopher Faulet12c51e22018-11-28 15:59:42 +01005537 c_adv(res, data);
5538 res->total += data;
5539
5540 channel_auto_read(&s->req);
5541 channel_abort(&s->req);
5542 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005543 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
Christopher Faulet12c51e22018-11-28 15:59:42 +01005544
5545 res->wex = tick_add_ifset(now_ms, res->wto);
5546 channel_auto_read(res);
5547 channel_auto_close(res);
5548 channel_shutr_now(res);
5549 return 0;
5550
5551 fail:
5552 /* If an error occurred, remove the incomplete HTTP response from the
5553 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005554 channel_htx_truncate(res, htx);
Christopher Faulet12c51e22018-11-28 15:59:42 +01005555 return -1;
5556}
5557
Christopher Faulet0f226952018-10-22 09:29:56 +02005558/*
5559 * Capture headers from message <htx> according to header list <cap_hdr>, and
5560 * fill the <cap> pointers appropriately.
5561 */
5562static void htx_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
5563{
5564 struct cap_hdr *h;
5565 int32_t pos;
5566
Christopher Fauleta3f15502019-05-13 15:27:23 +02005567 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02005568 struct htx_blk *blk = htx_get_blk(htx, pos);
5569 enum htx_blk_type type = htx_get_blk_type(blk);
5570 struct ist n, v;
5571
5572 if (type == HTX_BLK_EOH)
5573 break;
5574 if (type != HTX_BLK_HDR)
5575 continue;
5576
5577 n = htx_get_blk_name(htx, blk);
5578
5579 for (h = cap_hdr; h; h = h->next) {
5580 if (h->namelen && (h->namelen == n.len) &&
5581 (strncasecmp(n.ptr, h->name, h->namelen) == 0)) {
5582 if (cap[h->index] == NULL)
5583 cap[h->index] =
5584 pool_alloc(h->pool);
5585
5586 if (cap[h->index] == NULL) {
5587 ha_alert("HTTP capture : out of memory.\n");
5588 break;
5589 }
5590
5591 v = htx_get_blk_value(htx, blk);
5592 if (v.len > h->len)
5593 v.len = h->len;
5594
5595 memcpy(cap[h->index], v.ptr, v.len);
5596 cap[h->index][v.len]=0;
5597 }
5598 }
5599 }
5600}
5601
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02005602/* Delete a value in a header between delimiters <from> and <next>. The header
5603 * itself is delimited by <start> and <end> pointers. The number of characters
5604 * displaced is returned, and the pointer to the first delimiter is updated if
5605 * required. The function tries as much as possible to respect the following
5606 * principles :
5607 * - replace <from> delimiter by the <next> one unless <from> points to <start>,
5608 * in which case <next> is simply removed
5609 * - set exactly one space character after the new first delimiter, unless there
5610 * are not enough characters in the block being moved to do so.
5611 * - remove unneeded spaces before the previous delimiter and after the new
5612 * one.
5613 *
5614 * It is the caller's responsibility to ensure that :
5615 * - <from> points to a valid delimiter or <start> ;
5616 * - <next> points to a valid delimiter or <end> ;
5617 * - there are non-space chars before <from>.
5618 */
5619static int htx_del_hdr_value(char *start, char *end, char **from, char *next)
5620{
5621 char *prev = *from;
5622
5623 if (prev == start) {
5624 /* We're removing the first value. eat the semicolon, if <next>
5625 * is lower than <end> */
5626 if (next < end)
5627 next++;
5628
5629 while (next < end && HTTP_IS_SPHT(*next))
5630 next++;
5631 }
5632 else {
5633 /* Remove useless spaces before the old delimiter. */
5634 while (HTTP_IS_SPHT(*(prev-1)))
5635 prev--;
5636 *from = prev;
5637
5638 /* copy the delimiter and if possible a space if we're
5639 * not at the end of the line.
5640 */
5641 if (next < end) {
5642 *prev++ = *next++;
5643 if (prev + 1 < next)
5644 *prev++ = ' ';
5645 while (next < end && HTTP_IS_SPHT(*next))
5646 next++;
5647 }
5648 }
5649 memmove(prev, next, end - next);
5650 return (prev - next);
5651}
5652
Christopher Faulet0f226952018-10-22 09:29:56 +02005653
5654/* Formats the start line of the request (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08005655 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Faulet0f226952018-10-22 09:29:56 +02005656 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005657static size_t htx_fmt_req_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Faulet0f226952018-10-22 09:29:56 +02005658{
5659 struct ist dst = ist2(str, 0);
5660
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005661 if (istcat(&dst, htx_sl_req_meth(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005662 goto end;
5663 if (dst.len + 1 > len)
5664 goto end;
5665 dst.ptr[dst.len++] = ' ';
5666
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005667 if (istcat(&dst, htx_sl_req_uri(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005668 goto end;
5669 if (dst.len + 1 > len)
5670 goto end;
5671 dst.ptr[dst.len++] = ' ';
5672
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005673 istcat(&dst, htx_sl_req_vsn(sl), len);
Christopher Faulet0f226952018-10-22 09:29:56 +02005674 end:
5675 return dst.len;
5676}
5677
Christopher Fauletf0523542018-10-24 11:06:58 +02005678/* Formats the start line of the response (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08005679 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Fauletf0523542018-10-24 11:06:58 +02005680 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005681static size_t htx_fmt_res_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Fauletf0523542018-10-24 11:06:58 +02005682{
5683 struct ist dst = ist2(str, 0);
5684
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005685 if (istcat(&dst, htx_sl_res_vsn(sl), len) == -1)
Christopher Fauletf0523542018-10-24 11:06:58 +02005686 goto end;
5687 if (dst.len + 1 > len)
5688 goto end;
5689 dst.ptr[dst.len++] = ' ';
5690
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005691 if (istcat(&dst, htx_sl_res_code(sl), len) == -1)
Christopher Fauletf0523542018-10-24 11:06:58 +02005692 goto end;
5693 if (dst.len + 1 > len)
5694 goto end;
5695 dst.ptr[dst.len++] = ' ';
5696
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005697 istcat(&dst, htx_sl_res_reason(sl), len);
Christopher Fauletf0523542018-10-24 11:06:58 +02005698 end:
5699 return dst.len;
5700}
5701
5702
Christopher Faulet0f226952018-10-22 09:29:56 +02005703/*
5704 * Print a debug line with a start line.
5705 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005706static void htx_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl)
Christopher Faulet0f226952018-10-22 09:29:56 +02005707{
5708 struct session *sess = strm_sess(s);
5709 int max;
5710
5711 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5712 dir,
5713 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
5714 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
5715
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005716 max = HTX_SL_P1_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005717 UBOUND(max, trash.size - trash.data - 3);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005718 chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005719 trash.area[trash.data++] = ' ';
5720
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005721 max = HTX_SL_P2_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005722 UBOUND(max, trash.size - trash.data - 2);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005723 chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005724 trash.area[trash.data++] = ' ';
5725
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005726 max = HTX_SL_P3_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005727 UBOUND(max, trash.size - trash.data - 1);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005728 chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005729 trash.area[trash.data++] = '\n';
5730
5731 shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
5732}
5733
5734/*
5735 * Print a debug line with a header.
5736 */
5737static void htx_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v)
5738{
5739 struct session *sess = strm_sess(s);
5740 int max;
5741
5742 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5743 dir,
5744 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
5745 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
5746
5747 max = n.len;
5748 UBOUND(max, trash.size - trash.data - 3);
5749 chunk_memcat(&trash, n.ptr, max);
5750 trash.area[trash.data++] = ':';
5751 trash.area[trash.data++] = ' ';
5752
5753 max = v.len;
5754 UBOUND(max, trash.size - trash.data - 1);
5755 chunk_memcat(&trash, v.ptr, max);
5756 trash.area[trash.data++] = '\n';
5757
5758 shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
5759}
5760
5761
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005762__attribute__((constructor))
5763static void __htx_protocol_init(void)
5764{
5765}
5766
5767
5768/*
5769 * Local variables:
5770 * c-indent-level: 8
5771 * c-basic-offset: 8
5772 * End:
5773 */