blob: 35925c4e70fc9c6e6da60058edef8d5dbf51e486 [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 Faulet29f17582019-05-23 11:03:26 +0200135 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
Christopher Faulet0ef372a2019-04-08 10:57:20 +0200136 if (htx->flags & HTX_FL_UPGRADE)
137 goto failed_keep_alive;
138
Christopher Faulet9768c262018-10-22 09:34:31 +0200139 /* 1: have we encountered a read error ? */
140 if (req->flags & CF_READ_ERROR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200141 if (!(s->flags & SF_ERR_MASK))
142 s->flags |= SF_ERR_CLICL;
143
144 if (txn->flags & TX_WAIT_NEXT_RQ)
145 goto failed_keep_alive;
146
147 if (sess->fe->options & PR_O_IGNORE_PRB)
148 goto failed_keep_alive;
149
Christopher Faulet9768c262018-10-22 09:34:31 +0200150 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200151 stream_inc_http_req_ctr(s);
152 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100153 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200154 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100155 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200156
Christopher Faulet9768c262018-10-22 09:34:31 +0200157 txn->status = 400;
158 msg->err_state = msg->msg_state;
159 msg->msg_state = HTTP_MSG_ERROR;
160 htx_reply_and_close(s, txn->status, NULL);
161 req->analysers &= AN_REQ_FLT_END;
162
Christopher Faulete0768eb2018-10-03 16:38:02 +0200163 if (!(s->flags & SF_FINST_MASK))
164 s->flags |= SF_FINST_R;
165 return 0;
166 }
167
Christopher Faulet9768c262018-10-22 09:34:31 +0200168 /* 2: has the read timeout expired ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200169 else if (req->flags & CF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
170 if (!(s->flags & SF_ERR_MASK))
171 s->flags |= SF_ERR_CLITO;
172
173 if (txn->flags & TX_WAIT_NEXT_RQ)
174 goto failed_keep_alive;
175
176 if (sess->fe->options & PR_O_IGNORE_PRB)
177 goto failed_keep_alive;
178
Christopher Faulet9768c262018-10-22 09:34:31 +0200179 stream_inc_http_err_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200180 stream_inc_http_req_ctr(s);
181 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100182 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200183 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100184 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200185
Christopher Faulet9768c262018-10-22 09:34:31 +0200186 txn->status = 408;
187 msg->err_state = msg->msg_state;
188 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100189 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200190 req->analysers &= AN_REQ_FLT_END;
191
Christopher Faulete0768eb2018-10-03 16:38:02 +0200192 if (!(s->flags & SF_FINST_MASK))
193 s->flags |= SF_FINST_R;
194 return 0;
195 }
196
Christopher Faulet9768c262018-10-22 09:34:31 +0200197 /* 3: have we encountered a close ? */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200198 else if (req->flags & CF_SHUTR) {
199 if (!(s->flags & SF_ERR_MASK))
200 s->flags |= SF_ERR_CLICL;
201
202 if (txn->flags & TX_WAIT_NEXT_RQ)
203 goto failed_keep_alive;
204
205 if (sess->fe->options & PR_O_IGNORE_PRB)
206 goto failed_keep_alive;
207
Christopher Faulete0768eb2018-10-03 16:38:02 +0200208 stream_inc_http_err_ctr(s);
209 stream_inc_http_req_ctr(s);
210 proxy_inc_fe_req_ctr(sess->fe);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100211 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200212 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100213 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200214
Christopher Faulet9768c262018-10-22 09:34:31 +0200215 txn->status = 400;
216 msg->err_state = msg->msg_state;
217 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100218 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulet9768c262018-10-22 09:34:31 +0200219 req->analysers &= AN_REQ_FLT_END;
220
Christopher Faulete0768eb2018-10-03 16:38:02 +0200221 if (!(s->flags & SF_FINST_MASK))
222 s->flags |= SF_FINST_R;
223 return 0;
224 }
225
226 channel_dont_connect(req);
227 req->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
228 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100229
Christopher Faulet9768c262018-10-22 09:34:31 +0200230 if (sess->listener->options & LI_O_NOQUICKACK && htx_is_not_empty(htx) &&
Christopher Faulete0768eb2018-10-03 16:38:02 +0200231 objt_conn(sess->origin) && conn_ctrl_ready(__objt_conn(sess->origin))) {
232 /* We need more data, we have to re-enable quick-ack in case we
233 * previously disabled it, otherwise we might cause the client
234 * to delay next data.
235 */
Willy Tarreau1a18b542018-12-11 16:37:42 +0100236 conn_set_quickack(objt_conn(sess->origin), 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200237 }
Willy Tarreau1a18b542018-12-11 16:37:42 +0100238
Christopher Faulet47365272018-10-31 17:40:50 +0100239 if ((req->flags & CF_READ_PARTIAL) && (txn->flags & TX_WAIT_NEXT_RQ)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200240 /* If the client starts to talk, let's fall back to
241 * request timeout processing.
242 */
243 txn->flags &= ~TX_WAIT_NEXT_RQ;
244 req->analyse_exp = TICK_ETERNITY;
245 }
246
247 /* just set the request timeout once at the beginning of the request */
248 if (!tick_isset(req->analyse_exp)) {
Christopher Faulet47365272018-10-31 17:40:50 +0100249 if ((txn->flags & TX_WAIT_NEXT_RQ) && tick_isset(s->be->timeout.httpka))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200250 req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
251 else
252 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
253 }
254
255 /* we're not ready yet */
256 return 0;
257
258 failed_keep_alive:
259 /* Here we process low-level errors for keep-alive requests. In
260 * short, if the request is not the first one and it experiences
261 * a timeout, read error or shutdown, we just silently close so
262 * that the client can try again.
263 */
264 txn->status = 0;
265 msg->msg_state = HTTP_MSG_RQBEFORE;
266 req->analysers &= AN_REQ_FLT_END;
267 s->logs.logwait = 0;
268 s->logs.level = 0;
269 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Faulet9768c262018-10-22 09:34:31 +0200270 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200271 return 0;
272 }
273
Christopher Faulet9768c262018-10-22 09:34:31 +0200274 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200275 stream_inc_http_req_ctr(s);
276 proxy_inc_fe_req_ctr(sess->fe); /* one more valid request for this FE */
277
Christopher Faulet9768c262018-10-22 09:34:31 +0200278 /* kill the pending keep-alive timeout */
279 txn->flags &= ~TX_WAIT_NEXT_RQ;
280 req->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200281
Christopher Faulet29f17582019-05-23 11:03:26 +0200282 BUG_ON(htx_get_first_type(htx) != HTX_BLK_REQ_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +0200283 sl = http_get_stline(htx);
Christopher Faulet03599112018-11-27 11:21:21 +0100284
Christopher Faulet9768c262018-10-22 09:34:31 +0200285 /* 0: we might have to print this header in debug mode */
286 if (unlikely((global.mode & MODE_DEBUG) &&
287 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
288 int32_t pos;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200289
Christopher Faulet03599112018-11-27 11:21:21 +0100290 htx_debug_stline("clireq", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +0200291
Christopher Fauleta3f15502019-05-13 15:27:23 +0200292 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200293 struct htx_blk *blk = htx_get_blk(htx, pos);
294 enum htx_blk_type type = htx_get_blk_type(blk);
295
296 if (type == HTX_BLK_EOH)
297 break;
298 if (type != HTX_BLK_HDR)
299 continue;
300
301 htx_debug_hdr("clihdr", s,
302 htx_get_blk_name(htx, blk),
303 htx_get_blk_value(htx, blk));
304 }
305 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200306
307 /*
Christopher Faulet03599112018-11-27 11:21:21 +0100308 * 1: identify the method and the version. Also set HTTP flags
Christopher Faulete0768eb2018-10-03 16:38:02 +0200309 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100310 txn->meth = sl->info.req.meth;
Christopher Faulet03599112018-11-27 11:21:21 +0100311 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +0200312 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +0100313 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +0100314 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +0100315 if (sl->flags & HTX_SL_F_BODYLESS)
316 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200317
318 /* we can make use of server redirect on GET and HEAD */
319 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
320 s->flags |= SF_REDIRECTABLE;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100321 else if (txn->meth == HTTP_METH_OTHER && isteqi(htx_sl_req_meth(sl), ist("PRI"))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200322 /* PRI is reserved for the HTTP/2 preface */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200323 goto return_bad_req;
324 }
325
326 /*
327 * 2: check if the URI matches the monitor_uri.
328 * We have to do this for every request which gets in, because
329 * the monitor-uri is defined by the frontend.
330 */
331 if (unlikely((sess->fe->monitor_uri_len != 0) &&
Christopher Faulet943ab4d2020-02-18 14:51:51 +0100332 isteq(htx_sl_req_uri(sl), ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200333 /*
334 * We have found the monitor URI
335 */
336 struct acl_cond *cond;
337
338 s->flags |= SF_MONITOR;
Olivier Houcharda798bf52019-03-08 18:52:00 +0100339 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200340
341 /* Check if we want to fail this monitor request or not */
342 list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) {
343 int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
344
345 ret = acl_pass(ret);
346 if (cond->pol == ACL_COND_UNLESS)
347 ret = !ret;
348
349 if (ret) {
350 /* we fail this request, let's return 503 service unavail */
351 txn->status = 503;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100352 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200353 if (!(s->flags & SF_ERR_MASK))
354 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
355 goto return_prx_cond;
356 }
357 }
358
Joseph Herlantc42c0e92018-11-25 10:43:27 -0800359 /* nothing to fail, let's reply normally */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200360 txn->status = 200;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100361 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200362 if (!(s->flags & SF_ERR_MASK))
363 s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
364 goto return_prx_cond;
365 }
366
367 /*
368 * 3: Maybe we have to copy the original REQURI for the logs ?
369 * Note: we cannot log anymore if the request has been
370 * classified as invalid.
371 */
372 if (unlikely(s->logs.logwait & LW_REQ)) {
373 /* we have a complete HTTP request that we must log */
374 if ((txn->uri = pool_alloc(pool_head_requri)) != NULL) {
Christopher Faulet9768c262018-10-22 09:34:31 +0200375 size_t len;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200376
Christopher Faulet9768c262018-10-22 09:34:31 +0200377 len = htx_fmt_req_line(sl, txn->uri, global.tune.requri_len - 1);
378 txn->uri[len] = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200379
380 if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT)))
381 s->do_log(s);
382 } else {
383 ha_alert("HTTP logging : out of memory.\n");
384 }
385 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200386
Christopher Faulete0768eb2018-10-03 16:38:02 +0200387 /* if the frontend has "option http-use-proxy-header", we'll check if
388 * we have what looks like a proxied connection instead of a connection,
389 * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
390 * Note that this is *not* RFC-compliant, however browsers and proxies
391 * happen to do that despite being non-standard :-(
392 * We consider that a request not beginning with either '/' or '*' is
393 * a proxied connection, which covers both "scheme://location" and
394 * CONNECT ip:port.
395 */
396 if ((sess->fe->options2 & PR_O2_USE_PXHDR) &&
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100397 *HTX_SL_REQ_UPTR(sl) != '/' && *HTX_SL_REQ_UPTR(sl) != '*')
Christopher Faulete0768eb2018-10-03 16:38:02 +0200398 txn->flags |= TX_USE_PX_CONN;
399
Christopher Faulete0768eb2018-10-03 16:38:02 +0200400 /* 5: we may need to capture headers */
401 if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
Christopher Faulet9768c262018-10-22 09:34:31 +0200402 htx_capture_headers(htx, s->req_cap, sess->fe->req_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200403
Christopher Faulet03b9d8b2019-03-26 22:02:00 +0100404 /* by default, close the stream at the end of the transaction. */
405 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200406
407 /* we may have to wait for the request's body */
Christopher Faulet9768c262018-10-22 09:34:31 +0200408 if (s->be->options & PR_O_WREQ_BODY)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200409 req->analysers |= AN_REQ_HTTP_BODY;
410
411 /*
412 * RFC7234#4:
413 * A cache MUST write through requests with methods
414 * that are unsafe (Section 4.2.1 of [RFC7231]) to
415 * the origin server; i.e., a cache is not allowed
416 * to generate a reply to such a request before
417 * having forwarded the request and having received
418 * a corresponding response.
419 *
420 * RFC7231#4.2.1:
421 * Of the request methods defined by this
422 * specification, the GET, HEAD, OPTIONS, and TRACE
423 * methods are defined to be safe.
424 */
425 if (likely(txn->meth == HTTP_METH_GET ||
426 txn->meth == HTTP_METH_HEAD ||
427 txn->meth == HTTP_METH_OPTIONS ||
428 txn->meth == HTTP_METH_TRACE))
429 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
430
431 /* end of job, return OK */
432 req->analysers &= ~an_bit;
433 req->analyse_exp = TICK_ETERNITY;
Christopher Faulet9768c262018-10-22 09:34:31 +0200434
Christopher Faulete0768eb2018-10-03 16:38:02 +0200435 return 1;
436
437 return_bad_req:
Christopher Faulet9768c262018-10-22 09:34:31 +0200438 txn->status = 400;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200439 txn->req.err_state = txn->req.msg_state;
440 txn->req.msg_state = HTTP_MSG_ERROR;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100441 htx_reply_and_close(s, txn->status, htx_error_message(s));
Olivier Houcharda798bf52019-03-08 18:52:00 +0100442 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200443 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100444 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200445
446 return_prx_cond:
447 if (!(s->flags & SF_ERR_MASK))
448 s->flags |= SF_ERR_PRXCOND;
449 if (!(s->flags & SF_FINST_MASK))
450 s->flags |= SF_FINST_R;
451
452 req->analysers &= AN_REQ_FLT_END;
453 req->analyse_exp = TICK_ETERNITY;
454 return 0;
455}
456
457
458/* This stream analyser runs all HTTP request processing which is common to
459 * frontends and backends, which means blocking ACLs, filters, connection-close,
460 * reqadd, stats and redirects. This is performed for the designated proxy.
461 * It returns 1 if the processing can continue on next analysers, or zero if it
462 * either needs more data or wants to immediately abort the request (eg: deny,
463 * error, ...).
464 */
465int htx_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px)
466{
467 struct session *sess = s->sess;
468 struct http_txn *txn = s->txn;
469 struct http_msg *msg = &txn->req;
Christopher Fauletff2759f2018-10-24 11:13:16 +0200470 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200471 struct redirect_rule *rule;
472 struct cond_wordlist *wl;
473 enum rule_result verdict;
474 int deny_status = HTTP_ERR_403;
475 struct connection *conn = objt_conn(sess->origin);
476
477 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
478 /* we need more data */
479 goto return_prx_yield;
480 }
481
482 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
483 now_ms, __FUNCTION__,
484 s,
485 req,
486 req->rex, req->wex,
487 req->flags,
488 ci_data(req),
489 req->analysers);
490
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100491 htx = htxbuf(&req->buf);
Christopher Fauletff2759f2018-10-24 11:13:16 +0200492
Christopher Faulet1907ccc2019-04-29 13:12:02 +0200493 /* just in case we have some per-backend tracking. Only called the first
494 * execution of the analyser. */
495 if (!s->current_rule || s->current_rule_list != &px->http_req_rules)
496 stream_inc_be_http_req_ctr(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200497
498 /* evaluate http-request rules */
499 if (!LIST_ISEMPTY(&px->http_req_rules)) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200500 verdict = htx_req_get_intercept_rule(px, &px->http_req_rules, s, &deny_status);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200501
502 switch (verdict) {
503 case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
504 goto return_prx_yield;
505
506 case HTTP_RULE_RES_CONT:
507 case HTTP_RULE_RES_STOP: /* nothing to do */
508 break;
509
510 case HTTP_RULE_RES_DENY: /* deny or tarpit */
511 if (txn->flags & TX_CLTARPIT)
512 goto tarpit;
513 goto deny;
514
515 case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */
516 goto return_prx_cond;
517
518 case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
519 goto done;
520
521 case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
522 goto return_bad_req;
523 }
524 }
525
526 if (conn && (conn->flags & CO_FL_EARLY_DATA) &&
Olivier Houchard629693f2020-01-23 14:57:36 +0100527 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_SSL_WAIT_HS))) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200528 struct http_hdr_ctx ctx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200529
Christopher Fauletff2759f2018-10-24 11:13:16 +0200530 ctx.blk = NULL;
531 if (!http_find_header(htx, ist("Early-Data"), &ctx, 0)) {
532 if (unlikely(!http_add_header(htx, ist("Early-Data"), ist("1"))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200533 goto return_bad_req;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200534 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200535 }
536
537 /* OK at this stage, we know that the request was accepted according to
538 * the http-request rules, we can check for the stats. Note that the
539 * URI is detected *before* the req* rules in order not to be affected
540 * by a possible reqrep, while they are processed *after* so that a
541 * reqdeny can still block them. This clearly needs to change in 1.6!
542 */
Christopher Faulet4629d082019-07-04 11:27:15 +0200543 if (!s->target && htx_stats_check_uri(s, txn, px)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200544 s->target = &http_stats_applet.obj_type;
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100545 if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200546 txn->status = 500;
547 s->logs.tv_request = now;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100548 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200549
550 if (!(s->flags & SF_ERR_MASK))
551 s->flags |= SF_ERR_RESOURCE;
552 goto return_prx_cond;
553 }
554
555 /* parse the whole stats request and extract the relevant information */
Christopher Fauletff2759f2018-10-24 11:13:16 +0200556 htx_handle_stats(s, req);
557 verdict = htx_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s, &deny_status);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200558 /* not all actions implemented: deny, allow, auth */
559
560 if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */
561 goto deny;
562
563 if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */
564 goto return_prx_cond;
565 }
566
567 /* evaluate the req* rules except reqadd */
568 if (px->req_exp != NULL) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200569 if (htx_apply_filters_to_request(s, req, px) < 0)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200570 goto return_bad_req;
571
572 if (txn->flags & TX_CLDENY)
573 goto deny;
574
575 if (txn->flags & TX_CLTARPIT) {
576 deny_status = HTTP_ERR_500;
577 goto tarpit;
578 }
579 }
580
581 /* add request headers from the rule sets in the same order */
582 list_for_each_entry(wl, &px->req_add, list) {
Christopher Fauletff2759f2018-10-24 11:13:16 +0200583 struct ist n,v;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200584 if (wl->cond) {
585 int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
586 ret = acl_pass(ret);
587 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
588 ret = !ret;
589 if (!ret)
590 continue;
591 }
592
Christopher Fauletff2759f2018-10-24 11:13:16 +0200593 http_parse_header(ist2(wl->s, strlen(wl->s)), &n, &v);
594 if (unlikely(!http_add_header(htx, n, v)))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200595 goto return_bad_req;
596 }
597
Christopher Faulet2571bc62019-03-01 11:44:26 +0100598 /* Proceed with the applets now. */
599 if (unlikely(objt_applet(s->target))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200600 if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
Olivier Houcharda798bf52019-03-08 18:52:00 +0100601 _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200602
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100603 if (htx_handle_expect_hdr(s, htx, msg) == -1)
604 goto return_bad_req;
605
Christopher Faulete0768eb2018-10-03 16:38:02 +0200606 if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is
607 s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy
608 if (!(s->flags & SF_FINST_MASK))
609 s->flags |= SF_FINST_R;
610
611 /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */
612 req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END);
613 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
614 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Christopher Fauletbcf242a2019-03-01 11:36:26 +0100615
616 req->flags |= CF_SEND_DONTWAIT;
617 s->flags |= SF_ASSIGNED;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200618 goto done;
619 }
620
621 /* check whether we have some ACLs set to redirect this request */
622 list_for_each_entry(rule, &px->redirect_rules, list) {
623 if (rule->cond) {
624 int ret;
625
626 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
627 ret = acl_pass(ret);
628 if (rule->cond->pol == ACL_COND_UNLESS)
629 ret = !ret;
630 if (!ret)
631 continue;
632 }
Christopher Fauletf2824e62018-10-01 12:12:37 +0200633 if (!htx_apply_redirect_rule(rule, s, txn))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200634 goto return_bad_req;
635 goto done;
636 }
637
638 /* POST requests may be accompanied with an "Expect: 100-Continue" header.
639 * If this happens, then the data will not come immediately, so we must
640 * send all what we have without waiting. Note that due to the small gain
641 * in waiting for the body of the request, it's easier to simply put the
642 * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
643 * itself once used.
644 */
645 req->flags |= CF_SEND_DONTWAIT;
646
647 done: /* done with this analyser, continue with next ones that the calling
648 * points will have set, if any.
649 */
650 req->analyse_exp = TICK_ETERNITY;
651 done_without_exp: /* done with this analyser, but dont reset the analyse_exp. */
652 req->analysers &= ~an_bit;
653 return 1;
654
655 tarpit:
656 /* Allow cookie logging
657 */
658 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletff2759f2018-10-24 11:13:16 +0200659 htx_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200660
661 /* When a connection is tarpitted, we use the tarpit timeout,
662 * which may be the same as the connect timeout if unspecified.
663 * If unset, then set it to zero because we really want it to
664 * eventually expire. We build the tarpit as an analyser.
665 */
Christopher Faulet202c6ce2019-01-07 14:57:35 +0100666 channel_htx_erase(&s->req, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200667
668 /* wipe the request out so that we can drop the connection early
669 * if the client closes first.
670 */
671 channel_dont_connect(req);
672
673 txn->status = http_err_codes[deny_status];
674
675 req->analysers &= AN_REQ_FLT_END; /* remove switching rules etc... */
676 req->analysers |= AN_REQ_HTTP_TARPIT;
677 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
678 if (!req->analyse_exp)
679 req->analyse_exp = tick_add(now_ms, 0);
680 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100681 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200682 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100683 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200684 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100685 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200686 goto done_without_exp;
687
688 deny: /* this request was blocked (denied) */
689
690 /* Allow cookie logging
691 */
692 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletff2759f2018-10-24 11:13:16 +0200693 htx_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200694
695 txn->flags |= TX_CLDENY;
696 txn->status = http_err_codes[deny_status];
697 s->logs.tv_request = now;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100698 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200699 stream_inc_http_err_ctr(s);
Olivier Houcharda798bf52019-03-08 18:52:00 +0100700 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200701 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100702 _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200703 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100704 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200705 goto return_prx_cond;
706
707 return_bad_req:
Christopher Faulete0768eb2018-10-03 16:38:02 +0200708 txn->req.err_state = txn->req.msg_state;
709 txn->req.msg_state = HTTP_MSG_ERROR;
710 txn->status = 400;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100711 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200712
Olivier Houcharda798bf52019-03-08 18:52:00 +0100713 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_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->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200716
717 return_prx_cond:
718 if (!(s->flags & SF_ERR_MASK))
719 s->flags |= SF_ERR_PRXCOND;
720 if (!(s->flags & SF_FINST_MASK))
721 s->flags |= SF_FINST_R;
722
723 req->analysers &= AN_REQ_FLT_END;
724 req->analyse_exp = TICK_ETERNITY;
725 return 0;
726
727 return_prx_yield:
728 channel_dont_connect(req);
729 return 0;
730}
731
732/* This function performs all the processing enabled for the current request.
733 * It returns 1 if the processing can continue on next analysers, or zero if it
734 * needs more data, encounters an error, or wants to immediately abort the
735 * request. It relies on buffers flags, and updates s->req.analysers.
736 */
737int htx_process_request(struct stream *s, struct channel *req, int an_bit)
738{
739 struct session *sess = s->sess;
740 struct http_txn *txn = s->txn;
741 struct http_msg *msg = &txn->req;
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200742 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200743 struct connection *cli_conn = objt_conn(strm_sess(s)->origin);
744
745 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
746 /* we need more data */
747 channel_dont_connect(req);
748 return 0;
749 }
750
751 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
752 now_ms, __FUNCTION__,
753 s,
754 req,
755 req->rex, req->wex,
756 req->flags,
757 ci_data(req),
758 req->analysers);
759
760 /*
761 * Right now, we know that we have processed the entire headers
762 * and that unwanted requests have been filtered out. We can do
763 * whatever we want with the remaining request. Also, now we
764 * may have separate values for ->fe, ->be.
765 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +0100766 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200767
768 /*
769 * If HTTP PROXY is set we simply get remote server address parsing
770 * incoming request. Note that this requires that a connection is
771 * allocated on the server side.
772 */
773 if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
774 struct connection *conn;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100775 struct htx_sl *sl;
776 struct ist uri, path;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200777
778 /* Note that for now we don't reuse existing proxy connections */
779 if (unlikely((conn = cs_conn(si_alloc_cs(&s->si[1], NULL))) == NULL)) {
780 txn->req.err_state = txn->req.msg_state;
781 txn->req.msg_state = HTTP_MSG_ERROR;
782 txn->status = 500;
783 req->analysers &= AN_REQ_FLT_END;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100784 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200785
786 if (!(s->flags & SF_ERR_MASK))
787 s->flags |= SF_ERR_RESOURCE;
788 if (!(s->flags & SF_FINST_MASK))
789 s->flags |= SF_FINST_R;
790
791 return 0;
792 }
Christopher Faulet297fbb42019-05-13 14:41:27 +0200793 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100794 uri = htx_sl_req_uri(sl);
795 path = http_get_path(uri);
796 if (url2sa(uri.ptr, uri.len - path.len, &conn->addr.to, NULL) == -1)
Christopher Faulete0768eb2018-10-03 16:38:02 +0200797 goto return_bad_req;
798
799 /* if the path was found, we have to remove everything between
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200800 * uri.ptr and path.ptr (excluded). If it was not found, we need
801 * to replace from all the uri by a single "/".
802 *
803 * Instead of rewritting the whole start line, we just update
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100804 * the star-line URI. Some space will be lost but it should be
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200805 * insignificant.
Christopher Faulete0768eb2018-10-03 16:38:02 +0200806 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +0100807 istcpy(&uri, (path.len ? path : ist("/")), uri.len);
Willy Tarreau3284dd22019-07-18 16:17:15 +0200808 conn->target = &s->be->obj_type;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200809 }
810
811 /*
812 * 7: Now we can work with the cookies.
813 * Note that doing so might move headers in the request, but
814 * the fields will stay coherent and the URI will not move.
815 * This should only be performed in the backend.
816 */
817 if (s->be->cookie_name || sess->fe->capture_name)
Christopher Fauletb6aadbd2018-12-18 16:41:31 +0100818 htx_manage_client_side_cookies(s, req);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200819
820 /* add unique-id if "header-unique-id" is specified */
821
822 if (!LIST_ISEMPTY(&sess->fe->format_unique_id) && !s->unique_id) {
823 if ((s->unique_id = pool_alloc(pool_head_uniqueid)) == NULL)
824 goto return_bad_req;
825 s->unique_id[0] = '\0';
826 build_logline(s, s->unique_id, UNIQUEID_LEN, &sess->fe->format_unique_id);
827 }
828
829 if (sess->fe->header_unique_id && s->unique_id) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200830 struct ist n = ist2(sess->fe->header_unique_id, strlen(sess->fe->header_unique_id));
831 struct ist v = ist2(s->unique_id, strlen(s->unique_id));
832
833 if (unlikely(!http_add_header(htx, n, v)))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200834 goto return_bad_req;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200835 }
836
837 /*
838 * 9: add X-Forwarded-For if either the frontend or the backend
839 * asks for it.
840 */
841 if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200842 struct http_hdr_ctx ctx = { .blk = NULL };
843 struct ist hdr = ist2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name,
844 s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len);
845
Christopher Faulete0768eb2018-10-03 16:38:02 +0200846 if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200847 http_find_header(htx, hdr, &ctx, 0)) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200848 /* The header is set to be added only if none is present
849 * and we found it, so don't do anything.
850 */
851 }
852 else if (cli_conn && cli_conn->addr.from.ss_family == AF_INET) {
853 /* Add an X-Forwarded-For header unless the source IP is
854 * in the 'except' network range.
855 */
856 if ((!sess->fe->except_mask.s_addr ||
857 (((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr & sess->fe->except_mask.s_addr)
858 != sess->fe->except_net.s_addr) &&
859 (!s->be->except_mask.s_addr ||
860 (((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr & s->be->except_mask.s_addr)
861 != s->be->except_net.s_addr)) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200862 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200863
864 /* Note: we rely on the backend to get the header name to be used for
865 * x-forwarded-for, because the header is really meant for the backends.
866 * However, if the backend did not specify any option, we have to rely
867 * on the frontend's header name.
868 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200869 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
870 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200871 goto return_bad_req;
872 }
873 }
874 else if (cli_conn && cli_conn->addr.from.ss_family == AF_INET6) {
875 /* FIXME: for the sake of completeness, we should also support
876 * 'except' here, although it is mostly useless in this case.
877 */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200878 char pn[INET6_ADDRSTRLEN];
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200879
Christopher Faulete0768eb2018-10-03 16:38:02 +0200880 inet_ntop(AF_INET6,
881 (const void *)&((struct sockaddr_in6 *)(&cli_conn->addr.from))->sin6_addr,
882 pn, sizeof(pn));
883
884 /* Note: we rely on the backend to get the header name to be used for
885 * x-forwarded-for, because the header is really meant for the backends.
886 * However, if the backend did not specify any option, we have to rely
887 * on the frontend's header name.
888 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200889 chunk_printf(&trash, "%s", pn);
890 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200891 goto return_bad_req;
892 }
893 }
894
895 /*
896 * 10: add X-Original-To if either the frontend or the backend
897 * asks for it.
898 */
899 if ((sess->fe->options | s->be->options) & PR_O_ORGTO) {
900
901 /* FIXME: don't know if IPv6 can handle that case too. */
902 if (cli_conn && cli_conn->addr.from.ss_family == AF_INET) {
903 /* Add an X-Original-To header unless the destination IP is
904 * in the 'except' network range.
905 */
906 conn_get_to_addr(cli_conn);
907
908 if (cli_conn->addr.to.ss_family == AF_INET &&
909 ((!sess->fe->except_mask_to.s_addr ||
910 (((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr & sess->fe->except_mask_to.s_addr)
911 != sess->fe->except_to.s_addr) &&
912 (!s->be->except_mask_to.s_addr ||
913 (((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
914 != s->be->except_to.s_addr))) {
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200915 struct ist hdr;
916 unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Christopher Faulete0768eb2018-10-03 16:38:02 +0200917
918 /* Note: we rely on the backend to get the header name to be used for
919 * x-original-to, because the header is really meant for the backends.
920 * However, if the backend did not specify any option, we have to rely
921 * on the frontend's header name.
922 */
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200923 if (s->be->orgto_hdr_len)
924 hdr = ist2(s->be->orgto_hdr_name, s->be->orgto_hdr_len);
925 else
926 hdr = ist2(sess->fe->orgto_hdr_name, sess->fe->orgto_hdr_len);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200927
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200928 chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
929 if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +0200930 goto return_bad_req;
931 }
932 }
Christopher Faulete0768eb2018-10-03 16:38:02 +0200933 }
934
Christopher Faulete0768eb2018-10-03 16:38:02 +0200935 /* If we have no server assigned yet and we're balancing on url_param
936 * with a POST request, we may be interested in checking the body for
937 * that parameter. This will be done in another analyser.
938 */
939 if (!(s->flags & (SF_ASSIGNED|SF_DIRECT)) &&
Willy Tarreau089eaa02019-01-14 15:17:46 +0100940 s->txn->meth == HTTP_METH_POST &&
941 (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH) {
Christopher Faulete0768eb2018-10-03 16:38:02 +0200942 channel_dont_connect(req);
943 req->analysers |= AN_REQ_HTTP_BODY;
944 }
945
946 req->analysers &= ~AN_REQ_FLT_XFER_DATA;
947 req->analysers |= AN_REQ_HTTP_XFER_BODY;
Willy Tarreau1a18b542018-12-11 16:37:42 +0100948
Christopher Faulete0768eb2018-10-03 16:38:02 +0200949 /* We expect some data from the client. Unless we know for sure
950 * we already have a full request, we have to re-enable quick-ack
951 * in case we previously disabled it, otherwise we might cause
952 * the client to delay further data.
953 */
954 if ((sess->listener->options & LI_O_NOQUICKACK) &&
Christopher Fauletd7bdfb12018-10-24 11:14:34 +0200955 (htx_get_tail_type(htx) != HTX_BLK_EOM))
Willy Tarreau1a18b542018-12-11 16:37:42 +0100956 conn_set_quickack(cli_conn, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200957
958 /*************************************************************
959 * OK, that's finished for the headers. We have done what we *
960 * could. Let's switch to the DATA state. *
961 ************************************************************/
962 req->analyse_exp = TICK_ETERNITY;
963 req->analysers &= ~an_bit;
964
965 s->logs.tv_request = now;
966 /* OK let's go on with the BODY now */
967 return 1;
968
969 return_bad_req: /* let's centralize all bad requests */
Christopher Faulete0768eb2018-10-03 16:38:02 +0200970 txn->req.err_state = txn->req.msg_state;
971 txn->req.msg_state = HTTP_MSG_ERROR;
972 txn->status = 400;
973 req->analysers &= AN_REQ_FLT_END;
Christopher Fauleta7b677c2018-11-29 16:48:49 +0100974 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +0200975
Olivier Houcharda798bf52019-03-08 18:52:00 +0100976 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200977 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +0100978 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +0200979
980 if (!(s->flags & SF_ERR_MASK))
981 s->flags |= SF_ERR_PRXCOND;
982 if (!(s->flags & SF_FINST_MASK))
983 s->flags |= SF_FINST_R;
984 return 0;
985}
986
987/* This function is an analyser which processes the HTTP tarpit. It always
988 * returns zero, at the beginning because it prevents any other processing
989 * from occurring, and at the end because it terminates the request.
990 */
991int htx_process_tarpit(struct stream *s, struct channel *req, int an_bit)
992{
993 struct http_txn *txn = s->txn;
994
995 /* This connection is being tarpitted. The CLIENT side has
996 * already set the connect expiration date to the right
997 * timeout. We just have to check that the client is still
998 * there and that the timeout has not expired.
999 */
1000 channel_dont_connect(req);
1001 if ((req->flags & (CF_SHUTR|CF_READ_ERROR)) == 0 &&
1002 !tick_is_expired(req->analyse_exp, now_ms))
1003 return 0;
1004
1005 /* We will set the queue timer to the time spent, just for
1006 * logging purposes. We fake a 500 server error, so that the
1007 * attacker will not suspect his connection has been tarpitted.
1008 * It will not cause trouble to the logs because we can exclude
1009 * the tarpitted connections by filtering on the 'PT' status flags.
1010 */
1011 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1012
Christopher Fauletef9a1692020-02-21 10:20:46 +01001013 htx_reply_and_close(s, txn->status, (!(req->flags & CF_READ_ERROR) ? htx_error_message(s) : NULL));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001014
1015 req->analysers &= AN_REQ_FLT_END;
1016 req->analyse_exp = TICK_ETERNITY;
1017
1018 if (!(s->flags & SF_ERR_MASK))
1019 s->flags |= SF_ERR_PRXCOND;
1020 if (!(s->flags & SF_FINST_MASK))
1021 s->flags |= SF_FINST_T;
1022 return 0;
1023}
1024
1025/* This function is an analyser which waits for the HTTP request body. It waits
1026 * for either the buffer to be full, or the full advertised contents to have
1027 * reached the buffer. It must only be called after the standard HTTP request
1028 * processing has occurred, because it expects the request to be parsed and will
1029 * look for the Expect header. It may send a 100-Continue interim response. It
1030 * takes in input any state starting from HTTP_MSG_BODY and leaves with one of
1031 * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it
1032 * needs to read more data, or 1 once it has completed its analysis.
1033 */
1034int htx_wait_for_request_body(struct stream *s, struct channel *req, int an_bit)
1035{
1036 struct session *sess = s->sess;
1037 struct http_txn *txn = s->txn;
1038 struct http_msg *msg = &s->txn->req;
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001039 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001040
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001041
1042 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1043 now_ms, __FUNCTION__,
1044 s,
1045 req,
1046 req->rex, req->wex,
1047 req->flags,
1048 ci_data(req),
1049 req->analysers);
1050
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001051 htx = htxbuf(&req->buf);
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001052
Willy Tarreau4236f032019-03-05 10:43:32 +01001053 if (htx->flags & HTX_FL_PARSING_ERROR)
1054 goto return_bad_req;
1055
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001056 if (msg->msg_state < HTTP_MSG_BODY)
1057 goto missing_data;
Christopher Faulet9768c262018-10-22 09:34:31 +02001058
Christopher Faulete0768eb2018-10-03 16:38:02 +02001059 /* We have to parse the HTTP request body to find any required data.
1060 * "balance url_param check_post" should have been the only way to get
1061 * into this. We were brought here after HTTP header analysis, so all
1062 * related structures are ready.
1063 */
1064
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001065 if (msg->msg_state < HTTP_MSG_DATA) {
Christopher Faulet4a28a532019-03-01 11:19:40 +01001066 if (htx_handle_expect_hdr(s, htx, msg) == -1)
1067 goto return_bad_req;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001068 }
1069
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001070 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001071
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001072 /* Now we're in HTTP_MSG_DATA. We just need to know if all data have
1073 * been received or if the buffer is full.
Christopher Faulete0768eb2018-10-03 16:38:02 +02001074 */
Christopher Faulet54b5e212019-06-04 10:08:28 +02001075 if (htx_get_tail_type(htx) > HTX_BLK_DATA ||
Christopher Fauletdcd8c5e2019-01-21 11:24:38 +01001076 channel_htx_full(req, htx, global.tune.maxrewrite))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001077 goto http_end;
1078
Christopher Fauletf76ebe82018-10-24 11:16:22 +02001079 missing_data:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001080 if ((req->flags & CF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
1081 txn->status = 408;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001082 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001083
1084 if (!(s->flags & SF_ERR_MASK))
1085 s->flags |= SF_ERR_CLITO;
1086 if (!(s->flags & SF_FINST_MASK))
1087 s->flags |= SF_FINST_D;
1088 goto return_err_msg;
1089 }
1090
1091 /* we get here if we need to wait for more data */
1092 if (!(req->flags & (CF_SHUTR | CF_READ_ERROR))) {
1093 /* Not enough data. We'll re-use the http-request
1094 * timeout here. Ideally, we should set the timeout
1095 * relative to the accept() date. We just set the
1096 * request timeout once at the beginning of the
1097 * request.
1098 */
1099 channel_dont_connect(req);
1100 if (!tick_isset(req->analyse_exp))
1101 req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
1102 return 0;
1103 }
1104
1105 http_end:
1106 /* The situation will not evolve, so let's give up on the analysis. */
1107 s->logs.tv_request = now; /* update the request timer to reflect full request */
1108 req->analysers &= ~an_bit;
1109 req->analyse_exp = TICK_ETERNITY;
1110 return 1;
1111
1112 return_bad_req: /* let's centralize all bad requests */
1113 txn->req.err_state = txn->req.msg_state;
1114 txn->req.msg_state = HTTP_MSG_ERROR;
1115 txn->status = 400;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001116 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001117
1118 if (!(s->flags & SF_ERR_MASK))
1119 s->flags |= SF_ERR_PRXCOND;
1120 if (!(s->flags & SF_FINST_MASK))
1121 s->flags |= SF_FINST_R;
1122
1123 return_err_msg:
1124 req->analysers &= AN_REQ_FLT_END;
Olivier Houcharda798bf52019-03-08 18:52:00 +01001125 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001126 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001127 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001128 return 0;
1129}
1130
1131/* This function is an analyser which forwards request body (including chunk
1132 * sizes if any). It is called as soon as we must forward, even if we forward
1133 * zero byte. The only situation where it must not be called is when we're in
1134 * tunnel mode and we want to forward till the close. It's used both to forward
1135 * remaining data and to resync after end of body. It expects the msg_state to
1136 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
1137 * read more data, or 1 once we can go on with next request or end the stream.
1138 * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
1139 * bytes of pending data + the headers if not already done.
1140 */
1141int htx_request_forward_body(struct stream *s, struct channel *req, int an_bit)
1142{
1143 struct session *sess = s->sess;
1144 struct http_txn *txn = s->txn;
Christopher Faulet9768c262018-10-22 09:34:31 +02001145 struct http_msg *msg = &txn->req;
1146 struct htx *htx;
Christopher Faulet93e02d82019-03-08 14:18:50 +01001147 short status = 0;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001148 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001149
1150 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1151 now_ms, __FUNCTION__,
1152 s,
1153 req,
1154 req->rex, req->wex,
1155 req->flags,
1156 ci_data(req),
1157 req->analysers);
1158
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001159 htx = htxbuf(&req->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001160
1161 if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
1162 ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) {
1163 /* Output closed while we were sending data. We must abort and
1164 * wake the other side up.
1165 */
Olivier Houcharde8b04b12019-07-12 15:48:58 +02001166 /* Don't abort yet if we had L7 retries activated and it
1167 * was a write error, we may recover.
1168 */
1169 if (!(req->flags & (CF_READ_ERROR | CF_READ_TIMEOUT)) &&
1170 (s->si[1].flags & SI_FL_L7_RETRY))
1171 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001172 msg->err_state = msg->msg_state;
1173 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001174 htx_end_request(s);
1175 htx_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001176 return 1;
1177 }
1178
1179 /* Note that we don't have to send 100-continue back because we don't
1180 * need the data to complete our job, and it's up to the server to
1181 * decide whether to return 100, 417 or anything else in return of
1182 * an "Expect: 100-continue" header.
1183 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001184 if (msg->msg_state == HTTP_MSG_BODY)
1185 msg->msg_state = HTTP_MSG_DATA;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001186
1187 /* Some post-connect processing might want us to refrain from starting to
1188 * forward data. Currently, the only reason for this is "balance url_param"
1189 * whichs need to parse/process the request after we've enabled forwarding.
1190 */
1191 if (unlikely(msg->flags & HTTP_MSGF_WAIT_CONN)) {
1192 if (!(s->res.flags & CF_READ_ATTACHED)) {
1193 channel_auto_connect(req);
1194 req->flags |= CF_WAKE_CONNECT;
1195 channel_dont_close(req); /* don't fail on early shutr */
1196 goto waiting;
1197 }
1198 msg->flags &= ~HTTP_MSGF_WAIT_CONN;
1199 }
1200
1201 /* in most states, we should abort in case of early close */
1202 channel_auto_close(req);
1203
1204 if (req->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01001205 if (req->to_forward == CHN_INFINITE_FORWARD) {
Christopher Fauletbe7c5522019-11-15 16:31:46 +01001206 if (req->flags & CF_EOI)
1207 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01001208 }
1209 else {
1210 /* We can't process the buffer's contents yet */
1211 req->flags |= CF_WAKE_WRITE;
1212 goto missing_data_or_waiting;
1213 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001214 }
1215
Christopher Fauletbe7c5522019-11-15 16:31:46 +01001216 if (msg->msg_state >= HTTP_MSG_ENDING)
1217 goto ending;
1218
1219 if (txn->meth == HTTP_METH_CONNECT) {
1220 msg->msg_state = HTTP_MSG_ENDING;
1221 goto ending;
1222 }
1223
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001224 /* Forward input data. We get it by removing all outgoing data not
1225 * forwarded yet from HTX data size. If there are some data filters, we
1226 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02001227 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001228 if (HAS_REQ_DATA_FILTERS(s)) {
1229 ret = flt_http_payload(s, msg, htx->data);
1230 if (ret < 0)
1231 goto return_bad_req;
Christopher Faulet421e7692019-06-13 11:16:45 +02001232 c_adv(req, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001233 }
1234 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02001235 c_adv(req, htx->data - co_data(req));
Christopher Faulet66af0b22019-03-22 14:54:52 +01001236 if (msg->flags & HTTP_MSGF_XFER_LEN)
1237 channel_htx_forward_forever(req, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001238 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001239
Christopher Fauletbe7c5522019-11-15 16:31:46 +01001240 if (htx->data != co_data(req))
1241 goto missing_data_or_waiting;
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001242
Christopher Faulet9768c262018-10-22 09:34:31 +02001243 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001244 * in HTTP_MSG_ENDING state. Then if all data was marked to be
1245 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02001246 */
1247 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
1248 goto missing_data_or_waiting;
1249
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001250 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02001251
Christopher Fauletbe7c5522019-11-15 16:31:46 +01001252 ending:
1253 /* other states, ENDING...TUNNEL */
1254 if (msg->msg_state >= HTTP_MSG_DONE)
1255 goto done;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001256
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001257 if (HAS_REQ_DATA_FILTERS(s)) {
1258 ret = flt_http_end(s, msg);
1259 if (ret <= 0) {
1260 if (!ret)
1261 goto missing_data_or_waiting;
1262 goto return_bad_req;
1263 }
1264 }
1265
Christopher Fauletbe7c5522019-11-15 16:31:46 +01001266 if (txn->meth == HTTP_METH_CONNECT)
1267 msg->msg_state = HTTP_MSG_TUNNEL;
1268 else {
1269 msg->msg_state = HTTP_MSG_DONE;
1270 req->to_forward = 0;
1271 }
1272
1273 done:
1274 /* we don't want to forward closes on DONE except in tunnel mode. */
1275 if ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
1276 channel_dont_close(req);
1277
Christopher Fauletf2824e62018-10-01 12:12:37 +02001278 htx_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001279 if (!(req->analysers & an_bit)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02001280 htx_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001281 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
1282 if (req->flags & CF_SHUTW) {
1283 /* request errors are most likely due to the
1284 * server aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01001285 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001286 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02001287 goto return_bad_req;
1288 }
1289 return 1;
1290 }
1291
1292 /* If "option abortonclose" is set on the backend, we want to monitor
1293 * the client's connection and forward any shutdown notification to the
1294 * server, which will decide whether to close or to go on processing the
1295 * request. We only do that in tunnel mode, and not in other modes since
1296 * it can be abused to exhaust source ports. */
Christopher Faulet769d0e92019-03-22 14:23:18 +01001297 if (s->be->options & PR_O_ABRT_CLOSE) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001298 channel_auto_read(req);
1299 if ((req->flags & (CF_SHUTR|CF_READ_NULL)) &&
1300 ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN))
1301 s->si[1].flags |= SI_FL_NOLINGER;
1302 channel_auto_close(req);
1303 }
1304 else if (s->txn->meth == HTTP_METH_POST) {
1305 /* POST requests may require to read extra CRLF sent by broken
1306 * browsers and which could cause an RST to be sent upon close
1307 * on some systems (eg: Linux). */
1308 channel_auto_read(req);
1309 }
1310 return 0;
1311
1312 missing_data_or_waiting:
1313 /* stop waiting for data if the input is closed before the end */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02001314 if (msg->msg_state < HTTP_MSG_ENDING && req->flags & CF_SHUTR)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001315 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001316
1317 waiting:
1318 /* waiting for the last bits to leave the buffer */
1319 if (req->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01001320 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001321
Christopher Faulet47365272018-10-31 17:40:50 +01001322 if (htx->flags & HTX_FL_PARSING_ERROR)
1323 goto return_bad_req;
Christopher Faulet9768c262018-10-22 09:34:31 +02001324
Christopher Faulete0768eb2018-10-03 16:38:02 +02001325 /* When TE: chunked is used, we need to get there again to parse remaining
1326 * chunks even if the client has closed, so we don't want to set CF_DONTCLOSE.
1327 * And when content-length is used, we never want to let the possible
1328 * shutdown be forwarded to the other side, as the state machine will
1329 * take care of it once the client responds. It's also important to
1330 * prevent TIME_WAITs from accumulating on the backend side, and for
1331 * HTTP/2 where the last frame comes with a shutdown.
1332 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001333 if (msg->flags & HTTP_MSGF_XFER_LEN)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001334 channel_dont_close(req);
1335
1336 /* We know that more data are expected, but we couldn't send more that
1337 * what we did. So we always set the CF_EXPECT_MORE flag so that the
1338 * system knows it must not set a PUSH on this first part. Interactive
1339 * modes are already handled by the stream sock layer. We must not do
1340 * this in content-length mode because it could present the MSG_MORE
1341 * flag with the last block of forwarded data, which would cause an
1342 * additional delay to be observed by the receiver.
1343 */
1344 if (msg->flags & HTTP_MSGF_TE_CHNK)
1345 req->flags |= CF_EXPECT_MORE;
1346
1347 return 0;
1348
Christopher Faulet93e02d82019-03-08 14:18:50 +01001349 return_cli_abort:
1350 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1351 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
1352 if (objt_server(s->target))
1353 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
1354 if (!(s->flags & SF_ERR_MASK))
1355 s->flags |= SF_ERR_CLICL;
1356 status = 400;
1357 goto return_error;
1358
1359 return_srv_abort:
1360 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
1361 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
1362 if (objt_server(s->target))
1363 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1);
1364 if (!(s->flags & SF_ERR_MASK))
1365 s->flags |= SF_ERR_SRVCL;
1366 status = 502;
1367 goto return_error;
1368
1369 return_bad_req:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001370 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001371 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001372 _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001373 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01001374 s->flags |= SF_ERR_CLICL;
1375 status = 400;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001376
Christopher Faulet93e02d82019-03-08 14:18:50 +01001377 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001378 txn->req.err_state = txn->req.msg_state;
1379 txn->req.msg_state = HTTP_MSG_ERROR;
Christopher Faulet9768c262018-10-22 09:34:31 +02001380 if (txn->status > 0) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02001381 /* Note: we don't send any error if some data were already sent */
Christopher Faulet9768c262018-10-22 09:34:31 +02001382 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001383 } else {
Christopher Faulet93e02d82019-03-08 14:18:50 +01001384 txn->status = status;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001385 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001386 }
1387 req->analysers &= AN_REQ_FLT_END;
1388 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 +01001389 if (!(s->flags & SF_FINST_MASK))
1390 s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001391 return 0;
1392}
1393
Olivier Houcharda254a372019-04-05 15:30:12 +02001394/* Reset the stream and the backend stream_interface to a situation suitable for attemption connection */
1395/* Returns 0 if we can attempt to retry, -1 otherwise */
1396static __inline int do_l7_retry(struct stream *s, struct stream_interface *si)
1397{
1398 struct channel *req, *res;
1399 int co_data;
1400
1401 si->conn_retries--;
1402 if (si->conn_retries < 0)
1403 return -1;
1404
Willy Tarreau223995e2019-05-04 10:38:31 +02001405 if (objt_server(s->target))
1406 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.retries, 1);
1407 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
1408
Olivier Houcharda254a372019-04-05 15:30:12 +02001409 req = &s->req;
1410 res = &s->res;
1411 /* Remove any write error from the request, and read error from the response */
1412 req->flags &= ~(CF_WRITE_ERROR | CF_WRITE_TIMEOUT | CF_SHUTW | CF_SHUTW_NOW);
1413 res->flags &= ~(CF_READ_ERROR | CF_READ_TIMEOUT | CF_SHUTR | CF_EOI | CF_READ_NULL | CF_SHUTR_NOW);
1414 res->analysers = 0;
1415 si->flags &= ~(SI_FL_ERR | SI_FL_EXP | SI_FL_RXBLK_SHUT);
Olivier Houchardc86a9662020-05-12 22:18:14 +02001416 s->flags &= ~SF_ADDR_SET;
Olivier Houchard530249c2019-07-12 16:16:59 +02001417 stream_choose_redispatch(s);
Olivier Houcharda254a372019-04-05 15:30:12 +02001418 si->exp = TICK_ETERNITY;
1419 res->rex = TICK_ETERNITY;
1420 res->to_forward = 0;
1421 res->analyse_exp = TICK_ETERNITY;
1422 res->total = 0;
Olivier Houchard530249c2019-07-12 16:16:59 +02001423 s->flags &= ~(SF_ERR_SRVTO | SF_ERR_SRVCL);
Olivier Houcharda254a372019-04-05 15:30:12 +02001424 si_release_endpoint(&s->si[1]);
1425 b_free(&req->buf);
1426 /* Swap the L7 buffer with the channel buffer */
1427 /* We know we stored the co_data as b_data, so get it there */
1428 co_data = b_data(&si->l7_buffer);
1429 b_set_data(&si->l7_buffer, b_size(&si->l7_buffer));
1430 b_xfer(&req->buf, &si->l7_buffer, b_data(&si->l7_buffer));
1431
1432 co_set_data(req, co_data);
1433 b_reset(&res->buf);
1434 co_set_data(res, 0);
1435 return 0;
1436}
1437
Christopher Faulete0768eb2018-10-03 16:38:02 +02001438/* This stream analyser waits for a complete HTTP response. It returns 1 if the
1439 * processing can continue on next analysers, or zero if it either needs more
1440 * data or wants to immediately abort the response (eg: timeout, error, ...). It
1441 * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
1442 * when it has nothing left to do, and may remove any analyser when it wants to
1443 * abort.
1444 */
1445int htx_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
1446{
Christopher Faulet9768c262018-10-22 09:34:31 +02001447 /*
1448 * We will analyze a complete HTTP response to check the its syntax.
1449 *
1450 * Once the start line and all headers are received, we may perform a
1451 * capture of the error (if any), and we will set a few fields. We also
1452 * logging and finally headers capture.
1453 */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001454 struct session *sess = s->sess;
1455 struct http_txn *txn = s->txn;
1456 struct http_msg *msg = &txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02001457 struct htx *htx;
Olivier Houcharda254a372019-04-05 15:30:12 +02001458 struct stream_interface *si_b = &s->si[1];
Christopher Faulet61608322018-11-23 16:23:45 +01001459 struct connection *srv_conn;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001460 struct htx_sl *sl;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001461 int n;
1462
1463 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1464 now_ms, __FUNCTION__,
1465 s,
1466 rep,
1467 rep->rex, rep->wex,
1468 rep->flags,
1469 ci_data(rep),
1470 rep->analysers);
1471
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001472 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001473
Willy Tarreau4236f032019-03-05 10:43:32 +01001474 /* Parsing errors are caught here */
1475 if (htx->flags & HTX_FL_PARSING_ERROR)
1476 goto return_bad_res;
1477
Christopher Faulete0768eb2018-10-03 16:38:02 +02001478 /*
1479 * Now we quickly check if we have found a full valid response.
1480 * If not so, we check the FD and buffer states before leaving.
1481 * A full response is indicated by the fact that we have seen
1482 * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
1483 * responses are checked first.
1484 *
1485 * Depending on whether the client is still there or not, we
1486 * may send an error response back or not. Note that normally
1487 * we should only check for HTTP status there, and check I/O
1488 * errors somewhere else.
1489 */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001490 next_one:
Christopher Faulet29f17582019-05-23 11:03:26 +02001491 if (unlikely(htx_is_empty(htx) || htx->first == -1)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001492 /* 1: have we encountered a read error ? */
1493 if (rep->flags & CF_READ_ERROR) {
Olivier Houchard865d8392019-05-03 22:46:27 +02001494 struct connection *conn = NULL;
1495
Olivier Houchard865d8392019-05-03 22:46:27 +02001496 if (objt_cs(s->si[1].end))
1497 conn = objt_cs(s->si[1].end)->conn;
1498
1499 if (si_b->flags & SI_FL_L7_RETRY &&
1500 (!conn || conn->err_code != CO_ER_SSL_EARLY_FAILED)) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001501 /* If we arrive here, then CF_READ_ERROR was
1502 * set by si_cs_recv() because we matched a
1503 * status, overwise it would have removed
1504 * the SI_FL_L7_RETRY flag, so it's ok not
1505 * to check s->be->retry_type.
1506 */
1507 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1508 return 0;
1509 }
1510
Olivier Houchard6db16992019-05-17 15:40:49 +02001511 if (txn->flags & TX_NOT_FIRST)
1512 goto abort_keep_alive;
1513
Olivier Houcharda798bf52019-03-08 18:52:00 +01001514 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001515 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001516 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001517 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001518 }
1519
Christopher Faulete0768eb2018-10-03 16:38:02 +02001520 rep->analysers &= AN_RES_FLT_END;
Christopher Faulet8868ac32020-04-01 08:14:16 +02001521 s->req.analysers &= AN_REQ_FLT_END;
1522 rep->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001523 txn->status = 502;
1524
1525 /* Check to see if the server refused the early data.
1526 * If so, just send a 425
1527 */
Willy Tarreau1b4cc2e2020-06-23 05:58:20 +02001528 if (conn && conn->err_code == CO_ER_SSL_EARLY_FAILED) {
Olivier Houchard865d8392019-05-03 22:46:27 +02001529 if ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001530 (si_b->flags & SI_FL_L7_RETRY) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001531 do_l7_retry(s, si_b) == 0)
1532 return 0;
1533 txn->status = 425;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001534 }
1535
1536 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001537 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001538
1539 if (!(s->flags & SF_ERR_MASK))
1540 s->flags |= SF_ERR_SRVCL;
1541 if (!(s->flags & SF_FINST_MASK))
1542 s->flags |= SF_FINST_H;
1543 return 0;
1544 }
1545
Christopher Faulet9768c262018-10-22 09:34:31 +02001546 /* 2: read timeout : return a 504 to the client. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001547 else if (rep->flags & CF_READ_TIMEOUT) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001548 if ((si_b->flags & SI_FL_L7_RETRY) &&
1549 (s->be->retry_type & PR_RE_TIMEOUT)) {
1550 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1551 return 0;
1552 }
Olivier Houcharda798bf52019-03-08 18:52:00 +01001553 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001554 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001555 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001556 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001557 }
1558
Christopher Faulete0768eb2018-10-03 16:38:02 +02001559 rep->analysers &= AN_RES_FLT_END;
Christopher Faulet8868ac32020-04-01 08:14:16 +02001560 s->req.analysers &= AN_REQ_FLT_END;
1561 rep->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001562 txn->status = 504;
1563 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001564 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001565
1566 if (!(s->flags & SF_ERR_MASK))
1567 s->flags |= SF_ERR_SRVTO;
1568 if (!(s->flags & SF_FINST_MASK))
1569 s->flags |= SF_FINST_H;
1570 return 0;
1571 }
1572
Christopher Faulet9768c262018-10-22 09:34:31 +02001573 /* 3: client abort with an abortonclose */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001574 else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001575 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
1576 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001577 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001578 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001579
1580 rep->analysers &= AN_RES_FLT_END;
Christopher Faulet8868ac32020-04-01 08:14:16 +02001581 s->req.analysers &= AN_REQ_FLT_END;
1582 rep->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001583 txn->status = 400;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001584 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001585
1586 if (!(s->flags & SF_ERR_MASK))
1587 s->flags |= SF_ERR_CLICL;
1588 if (!(s->flags & SF_FINST_MASK))
1589 s->flags |= SF_FINST_H;
1590
1591 /* process_stream() will take care of the error */
1592 return 0;
1593 }
1594
Christopher Faulet9768c262018-10-22 09:34:31 +02001595 /* 4: close from server, capture the response if the server has started to respond */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001596 else if (rep->flags & CF_SHUTR) {
Olivier Houcharda254a372019-04-05 15:30:12 +02001597 if ((si_b->flags & SI_FL_L7_RETRY) &&
1598 (s->be->retry_type & PR_RE_DISCONNECTED)) {
1599 if (co_data(rep) || do_l7_retry(s, si_b) == 0)
1600 return 0;
1601 }
1602
Olivier Houchard6db16992019-05-17 15:40:49 +02001603 if (txn->flags & TX_NOT_FIRST)
1604 goto abort_keep_alive;
1605
Olivier Houcharda798bf52019-03-08 18:52:00 +01001606 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001607 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001608 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001609 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001610 }
1611
Christopher Faulete0768eb2018-10-03 16:38:02 +02001612 rep->analysers &= AN_RES_FLT_END;
Christopher Faulet8868ac32020-04-01 08:14:16 +02001613 s->req.analysers &= AN_REQ_FLT_END;
1614 rep->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001615 txn->status = 502;
1616 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001617 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulete0768eb2018-10-03 16:38:02 +02001618
1619 if (!(s->flags & SF_ERR_MASK))
1620 s->flags |= SF_ERR_SRVCL;
1621 if (!(s->flags & SF_FINST_MASK))
1622 s->flags |= SF_FINST_H;
1623 return 0;
1624 }
1625
Christopher Faulet9768c262018-10-22 09:34:31 +02001626 /* 5: write error to client (we don't send any message then) */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001627 else if (rep->flags & CF_WRITE_ERROR) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001628 if (txn->flags & TX_NOT_FIRST)
Christopher Faulete0768eb2018-10-03 16:38:02 +02001629 goto abort_keep_alive;
1630
Olivier Houcharda798bf52019-03-08 18:52:00 +01001631 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001632 rep->analysers &= AN_RES_FLT_END;
Christopher Faulet8868ac32020-04-01 08:14:16 +02001633 s->req.analysers &= AN_REQ_FLT_END;
1634 rep->analyse_exp = TICK_ETERNITY;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001635
1636 if (!(s->flags & SF_ERR_MASK))
1637 s->flags |= SF_ERR_CLICL;
1638 if (!(s->flags & SF_FINST_MASK))
1639 s->flags |= SF_FINST_H;
1640
1641 /* process_stream() will take care of the error */
1642 return 0;
1643 }
1644
1645 channel_dont_close(rep);
1646 rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
1647 return 0;
1648 }
1649
1650 /* More interesting part now : we know that we have a complete
1651 * response which at least looks like HTTP. We have an indicator
1652 * of each header's length, so we can parse them quickly.
1653 */
Christopher Faulet9768c262018-10-22 09:34:31 +02001654 msg->msg_state = HTTP_MSG_BODY;
Christopher Faulet29f17582019-05-23 11:03:26 +02001655 BUG_ON(htx_get_first_type(htx) != HTX_BLK_RES_SL);
Christopher Faulet297fbb42019-05-13 14:41:27 +02001656 sl = http_get_stline(htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001657
Christopher Faulet9768c262018-10-22 09:34:31 +02001658 /* 0: we might have to print this header in debug mode */
1659 if (unlikely((global.mode & MODE_DEBUG) &&
1660 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
1661 int32_t pos;
1662
Christopher Faulet03599112018-11-27 11:21:21 +01001663 htx_debug_stline("srvrep", s, sl);
Christopher Faulet9768c262018-10-22 09:34:31 +02001664
Christopher Fauleta3f15502019-05-13 15:27:23 +02001665 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet9768c262018-10-22 09:34:31 +02001666 struct htx_blk *blk = htx_get_blk(htx, pos);
1667 enum htx_blk_type type = htx_get_blk_type(blk);
1668
1669 if (type == HTX_BLK_EOH)
1670 break;
1671 if (type != HTX_BLK_HDR)
1672 continue;
1673
1674 htx_debug_hdr("srvhdr", s,
1675 htx_get_blk_name(htx, blk),
1676 htx_get_blk_value(htx, blk));
1677 }
1678 }
1679
Christopher Faulet03599112018-11-27 11:21:21 +01001680 /* 1: get the status code and the version. Also set HTTP flags */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01001681 txn->status = sl->info.res.status;
Christopher Faulet03599112018-11-27 11:21:21 +01001682 if (sl->flags & HTX_SL_F_VER_11)
Christopher Faulet9768c262018-10-22 09:34:31 +02001683 msg->flags |= HTTP_MSGF_VER_11;
Christopher Faulet03599112018-11-27 11:21:21 +01001684 if (sl->flags & HTX_SL_F_XFER_LEN) {
1685 msg->flags |= HTTP_MSGF_XFER_LEN;
Christopher Faulet834eee72019-02-18 11:35:02 +01001686 msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK);
Christopher Fauletb2db4fa2018-11-27 16:51:09 +01001687 if (sl->flags & HTX_SL_F_BODYLESS)
1688 msg->flags |= HTTP_MSGF_BODYLESS;
Christopher Faulet03599112018-11-27 11:21:21 +01001689 }
Christopher Faulet9768c262018-10-22 09:34:31 +02001690
1691 n = txn->status / 100;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001692 if (n < 1 || n > 5)
1693 n = 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001694
Christopher Faulete0768eb2018-10-03 16:38:02 +02001695 /* when the client triggers a 4xx from the server, it's most often due
1696 * to a missing object or permission. These events should be tracked
1697 * because if they happen often, it may indicate a brute force or a
1698 * vulnerability scan.
1699 */
1700 if (n == 4)
1701 stream_inc_http_err_ctr(s);
1702
1703 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001704 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.p.http.rsp[n], 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001705
Christopher Faulete0768eb2018-10-03 16:38:02 +02001706 /* Adjust server's health based on status code. Note: status codes 501
1707 * and 505 are triggered on demand by client request, so we must not
1708 * count them as server failures.
1709 */
1710 if (objt_server(s->target)) {
1711 if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001712 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001713 else
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001714 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001715 }
1716
1717 /*
1718 * We may be facing a 100-continue response, or any other informational
1719 * 1xx response which is non-final, in which case this is not the right
1720 * response, and we're waiting for the next one. Let's allow this response
1721 * to go to the client and wait for the next one. There's an exception for
1722 * 101 which is used later in the code to switch protocols.
1723 */
1724 if (txn->status < 200 &&
1725 (txn->status == 100 || txn->status >= 102)) {
Christopher Fauletaed82cf2018-11-30 22:22:32 +01001726 FLT_STRM_CB(s, flt_http_reset(s, msg));
Christopher Faulet421e7692019-06-13 11:16:45 +02001727 htx->first = channel_htx_fwd_headers(rep, htx);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001728 msg->msg_state = HTTP_MSG_RPBEFORE;
Christopher Faulet6b0066e2019-09-03 15:23:54 +02001729 msg->flags = 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001730 txn->status = 0;
1731 s->logs.t_data = -1; /* was not a response yet */
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02001732 goto next_one;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001733 }
1734
1735 /*
1736 * 2: check for cacheability.
1737 */
1738
1739 switch (txn->status) {
1740 case 200:
1741 case 203:
1742 case 204:
1743 case 206:
1744 case 300:
1745 case 301:
1746 case 404:
1747 case 405:
1748 case 410:
1749 case 414:
1750 case 501:
1751 break;
1752 default:
1753 /* RFC7231#6.1:
1754 * Responses with status codes that are defined as
1755 * cacheable by default (e.g., 200, 203, 204, 206,
1756 * 300, 301, 404, 405, 410, 414, and 501 in this
1757 * specification) can be reused by a cache with
1758 * heuristic expiration unless otherwise indicated
1759 * by the method definition or explicit cache
1760 * controls [RFC7234]; all other status codes are
1761 * not cacheable by default.
1762 */
1763 txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
1764 break;
1765 }
1766
1767 /*
1768 * 3: we may need to capture headers
1769 */
1770 s->logs.logwait &= ~LW_RESP;
1771 if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
Christopher Faulet9768c262018-10-22 09:34:31 +02001772 htx_capture_headers(htx, s->res_cap, sess->fe->rsp_cap);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001773
Christopher Faulet9768c262018-10-22 09:34:31 +02001774 /* Skip parsing if no content length is possible. */
Christopher Faulete0768eb2018-10-03 16:38:02 +02001775 if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
1776 txn->status == 101)) {
1777 /* Either we've established an explicit tunnel, or we're
1778 * switching the protocol. In both cases, we're very unlikely
1779 * to understand the next protocols. We have to switch to tunnel
1780 * mode, so that we transfer the request and responses then let
1781 * this protocol pass unmodified. When we later implement specific
1782 * parsers for such protocols, we'll want to check the Upgrade
1783 * header which contains information about that protocol for
1784 * responses with status 101 (eg: see RFC2817 about TLS).
1785 */
1786 txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001787 }
1788
Christopher Faulet61608322018-11-23 16:23:45 +01001789 /* check for NTML authentication headers in 401 (WWW-Authenticate) and
1790 * 407 (Proxy-Authenticate) responses and set the connection to private
1791 */
1792 srv_conn = cs_conn(objt_cs(s->si[1].end));
1793 if (srv_conn) {
1794 struct ist hdr;
1795 struct http_hdr_ctx ctx;
1796
1797 if (txn->status == 401)
1798 hdr = ist("WWW-Authenticate");
1799 else if (txn->status == 407)
1800 hdr = ist("Proxy-Authenticate");
1801 else
1802 goto end;
1803
1804 ctx.blk = NULL;
1805 while (http_find_header(htx, hdr, &ctx, 0)) {
Willy Tarreaud22b28e2020-05-07 19:27:02 +02001806 /* If www-authenticate contains "Negotiate", "Nego2", or "NTLM",
1807 * possibly followed by blanks and a base64 string, the connection
1808 * is private. Since it's a mess to deal with, we only check for
1809 * values starting with "NTLM" or "Nego". Note that often multiple
1810 * headers are sent by the server there.
1811 */
1812 if ((ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "Nego", 4) == 0) ||
Willy Tarreaud3be89b2020-05-07 19:10:15 +02001813 (ctx.value.len >= 4 && strncasecmp(ctx.value.ptr, "NTLM", 4) == 0)) {
Olivier Houchard250031e2019-05-29 15:01:50 +02001814 sess->flags |= SESS_FL_PREFER_LAST;
Christopher Faulet61608322018-11-23 16:23:45 +01001815 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreaud22b28e2020-05-07 19:27:02 +02001816 break;
Olivier Houchard250031e2019-05-29 15:01:50 +02001817 }
Christopher Faulet61608322018-11-23 16:23:45 +01001818 }
1819 }
1820
1821 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02001822 /* we want to have the response time before we start processing it */
1823 s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
1824
1825 /* end of job, return OK */
1826 rep->analysers &= ~an_bit;
1827 rep->analyse_exp = TICK_ETERNITY;
1828 channel_auto_close(rep);
1829 return 1;
1830
Christopher Faulet47365272018-10-31 17:40:50 +01001831 return_bad_res:
Olivier Houcharda798bf52019-03-08 18:52:00 +01001832 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Faulet47365272018-10-31 17:40:50 +01001833 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01001834 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01001835 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
Christopher Faulet47365272018-10-31 17:40:50 +01001836 }
Olivier Houcharde3249a92019-05-03 23:01:47 +02001837 if ((s->be->retry_type & PR_RE_JUNK_REQUEST) &&
Olivier Houchardad26d8d2019-05-10 17:48:28 +02001838 (si_b->flags & SI_FL_L7_RETRY) &&
Olivier Houcharde3249a92019-05-03 23:01:47 +02001839 do_l7_retry(s, si_b) == 0)
1840 return 0;
Christopher Faulet47365272018-10-31 17:40:50 +01001841 txn->status = 502;
1842 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01001843 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Faulet47365272018-10-31 17:40:50 +01001844 rep->analysers &= AN_RES_FLT_END;
Christopher Fauletf6df2b42020-03-02 16:21:01 +01001845 s->req.analysers &= AN_REQ_FLT_END;
1846 rep->analyse_exp = TICK_ETERNITY;
Christopher Faulet47365272018-10-31 17:40:50 +01001847
1848 if (!(s->flags & SF_ERR_MASK))
1849 s->flags |= SF_ERR_PRXCOND;
1850 if (!(s->flags & SF_FINST_MASK))
1851 s->flags |= SF_FINST_H;
1852 return 0;
1853
Christopher Faulete0768eb2018-10-03 16:38:02 +02001854 abort_keep_alive:
1855 /* A keep-alive request to the server failed on a network error.
1856 * The client is required to retry. We need to close without returning
1857 * any other information so that the client retries.
1858 */
1859 txn->status = 0;
1860 rep->analysers &= AN_RES_FLT_END;
1861 s->req.analysers &= AN_REQ_FLT_END;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001862 s->logs.logwait = 0;
1863 s->logs.level = 0;
1864 s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
Christopher Faulet9768c262018-10-22 09:34:31 +02001865 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001866 return 0;
1867}
1868
1869/* This function performs all the processing enabled for the current response.
1870 * It normally returns 1 unless it wants to break. It relies on buffers flags,
1871 * and updates s->res.analysers. It might make sense to explode it into several
1872 * other functions. It works like process_request (see indications above).
1873 */
1874int htx_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
1875{
1876 struct session *sess = s->sess;
1877 struct http_txn *txn = s->txn;
1878 struct http_msg *msg = &txn->rsp;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001879 struct htx *htx;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001880 struct proxy *cur_proxy;
1881 struct cond_wordlist *wl;
1882 enum rule_result ret = HTTP_RULE_RES_CONT;
1883
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001884 if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
1885 return 0;
Christopher Faulet9768c262018-10-22 09:34:31 +02001886
Christopher Faulete0768eb2018-10-03 16:38:02 +02001887 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
1888 now_ms, __FUNCTION__,
1889 s,
1890 rep,
1891 rep->rex, rep->wex,
1892 rep->flags,
1893 ci_data(rep),
1894 rep->analysers);
1895
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01001896 htx = htxbuf(&rep->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001897
1898 /* The stats applet needs to adjust the Connection header but we don't
1899 * apply any filter there.
1900 */
1901 if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
1902 rep->analysers &= ~an_bit;
1903 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauletf2824e62018-10-01 12:12:37 +02001904 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001905 }
1906
1907 /*
1908 * We will have to evaluate the filters.
1909 * As opposed to version 1.2, now they will be evaluated in the
1910 * filters order and not in the header order. This means that
1911 * each filter has to be validated among all headers.
1912 *
1913 * Filters are tried with ->be first, then with ->fe if it is
1914 * different from ->be.
1915 *
1916 * Maybe we are in resume condiion. In this case I choose the
1917 * "struct proxy" which contains the rule list matching the resume
1918 * pointer. If none of theses "struct proxy" match, I initialise
1919 * the process with the first one.
1920 *
1921 * In fact, I check only correspondance betwwen the current list
1922 * pointer and the ->fe rule list. If it doesn't match, I initialize
1923 * the loop with the ->be.
1924 */
1925 if (s->current_rule_list == &sess->fe->http_res_rules)
1926 cur_proxy = sess->fe;
1927 else
1928 cur_proxy = s->be;
1929 while (1) {
1930 struct proxy *rule_set = cur_proxy;
1931
1932 /* evaluate http-response rules */
1933 if (ret == HTTP_RULE_RES_CONT) {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001934 ret = htx_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001935
1936 if (ret == HTTP_RULE_RES_BADREQ)
1937 goto return_srv_prx_502;
1938
1939 if (ret == HTTP_RULE_RES_DONE) {
1940 rep->analysers &= ~an_bit;
1941 rep->analyse_exp = TICK_ETERNITY;
1942 return 1;
1943 }
1944 }
1945
1946 /* we need to be called again. */
1947 if (ret == HTTP_RULE_RES_YIELD) {
1948 channel_dont_close(rep);
1949 return 0;
1950 }
1951
1952 /* try headers filters */
1953 if (rule_set->rsp_exp != NULL) {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001954 if (htx_apply_filters_to_response(s, rep, rule_set) < 0)
1955 goto return_bad_resp;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001956 }
1957
1958 /* has the response been denied ? */
1959 if (txn->flags & TX_SVDENY) {
1960 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01001961 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_secu, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001962
Olivier Houcharda798bf52019-03-08 18:52:00 +01001963 _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
1964 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001965 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01001966 _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02001967 goto return_srv_prx_502;
1968 }
1969
1970 /* add response headers from the rule sets in the same order */
1971 list_for_each_entry(wl, &rule_set->rsp_add, list) {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001972 struct ist n, v;
Christopher Faulete0768eb2018-10-03 16:38:02 +02001973 if (txn->status < 200 && txn->status != 101)
1974 break;
1975 if (wl->cond) {
1976 int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
1977 ret = acl_pass(ret);
1978 if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
1979 ret = !ret;
1980 if (!ret)
1981 continue;
1982 }
Christopher Fauletfec7bd12018-10-24 11:17:50 +02001983
1984 http_parse_header(ist2(wl->s, strlen(wl->s)), &n, &v);
1985 if (unlikely(!http_add_header(htx, n, v)))
Christopher Faulete0768eb2018-10-03 16:38:02 +02001986 goto return_bad_resp;
1987 }
1988
1989 /* check whether we're already working on the frontend */
1990 if (cur_proxy == sess->fe)
1991 break;
1992 cur_proxy = sess->fe;
1993 }
1994
1995 /* After this point, this anayzer can't return yield, so we can
1996 * remove the bit corresponding to this analyzer from the list.
1997 *
1998 * Note that the intermediate returns and goto found previously
1999 * reset the analyzers.
2000 */
2001 rep->analysers &= ~an_bit;
2002 rep->analyse_exp = TICK_ETERNITY;
2003
2004 /* OK that's all we can do for 1xx responses */
2005 if (unlikely(txn->status < 200 && txn->status != 101))
Christopher Fauletf2824e62018-10-01 12:12:37 +02002006 goto end;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002007
2008 /*
2009 * Now check for a server cookie.
2010 */
2011 if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002012 htx_manage_server_side_cookies(s, rep);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002013
2014 /*
2015 * Check for cache-control or pragma headers if required.
2016 */
2017 if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
2018 check_response_for_cacheability(s, rep);
2019
2020 /*
2021 * Add server cookie in the response if needed
2022 */
2023 if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
2024 !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
2025 (!(s->flags & SF_DIRECT) ||
2026 ((s->be->cookie_maxidle || txn->cookie_last_date) &&
2027 (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
2028 (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
2029 (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
2030 (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
2031 !(s->flags & SF_IGNORE_PRST)) {
2032 /* the server is known, it's not the one the client requested, or the
2033 * cookie's last seen date needs to be refreshed. We have to
2034 * insert a set-cookie here, except if we want to insert only on POST
2035 * requests and this one isn't. Note that servers which don't have cookies
2036 * (eg: some backup servers) will return a full cookie removal request.
2037 */
2038 if (!objt_server(s->target)->cookie) {
2039 chunk_printf(&trash,
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002040 "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
Christopher Faulete0768eb2018-10-03 16:38:02 +02002041 s->be->cookie_name);
2042 }
2043 else {
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002044 chunk_printf(&trash, "%s=%s", s->be->cookie_name, objt_server(s->target)->cookie);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002045
2046 if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
2047 /* emit last_date, which is mandatory */
2048 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2049 s30tob64((date.tv_sec+3) >> 2,
2050 trash.area + trash.data);
2051 trash.data += 5;
2052
2053 if (s->be->cookie_maxlife) {
2054 /* emit first_date, which is either the original one or
2055 * the current date.
2056 */
2057 trash.area[trash.data++] = COOKIE_DELIM_DATE;
2058 s30tob64(txn->cookie_first_date ?
2059 txn->cookie_first_date >> 2 :
2060 (date.tv_sec+3) >> 2,
2061 trash.area + trash.data);
2062 trash.data += 5;
2063 }
2064 }
2065 chunk_appendf(&trash, "; path=/");
2066 }
2067
2068 if (s->be->cookie_domain)
2069 chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
2070
2071 if (s->be->ck_opts & PR_CK_HTTPONLY)
2072 chunk_appendf(&trash, "; HttpOnly");
2073
2074 if (s->be->ck_opts & PR_CK_SECURE)
2075 chunk_appendf(&trash, "; Secure");
2076
Christopher Fauletdb2cdbb2020-01-21 11:06:48 +01002077 if (s->be->cookie_attrs)
2078 chunk_appendf(&trash, "; %s", s->be->cookie_attrs);
2079
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002080 if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data))))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002081 goto return_bad_resp;
2082
2083 txn->flags &= ~TX_SCK_MASK;
2084 if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
2085 /* the server did not change, only the date was updated */
2086 txn->flags |= TX_SCK_UPDATED;
2087 else
2088 txn->flags |= TX_SCK_INSERTED;
2089
2090 /* Here, we will tell an eventual cache on the client side that we don't
2091 * want it to cache this reply because HTTP/1.0 caches also cache cookies !
2092 * Some caches understand the correct form: 'no-cache="set-cookie"', but
2093 * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
2094 */
2095 if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
2096
2097 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
2098
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002099 if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private"))))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002100 goto return_bad_resp;
2101 }
2102 }
2103
2104 /*
2105 * Check if result will be cacheable with a cookie.
2106 * We'll block the response if security checks have caught
2107 * nasty things such as a cacheable cookie.
2108 */
2109 if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
2110 (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
2111 (s->be->options & PR_O_CHK_CACHE)) {
2112 /* we're in presence of a cacheable response containing
2113 * a set-cookie header. We'll block it as requested by
2114 * the 'checkcache' option, and send an alert.
2115 */
2116 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01002117 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_secu, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002118
Olivier Houcharda798bf52019-03-08 18:52:00 +01002119 _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
2120 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002121 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01002122 _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002123
2124 ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
2125 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
2126 send_log(s->be, LOG_ALERT,
2127 "Blocking cacheable cookie in response from instance %s, server %s.\n",
2128 s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
2129 goto return_srv_prx_502;
2130 }
2131
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002132 end:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002133 /* Always enter in the body analyzer */
2134 rep->analysers &= ~AN_RES_FLT_XFER_DATA;
2135 rep->analysers |= AN_RES_HTTP_XFER_BODY;
2136
2137 /* if the user wants to log as soon as possible, without counting
2138 * bytes from the server, then this is the right moment. We have
2139 * to temporarily assign bytes_out to log what we currently have.
2140 */
2141 if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
2142 s->logs.t_close = s->logs.t_data; /* to get a valid end date */
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002143 s->logs.bytes_out = htx->data;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002144 s->do_log(s);
2145 s->logs.bytes_out = 0;
2146 }
2147 return 1;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002148
2149 return_bad_resp:
2150 if (objt_server(s->target)) {
Olivier Houcharda798bf52019-03-08 18:52:00 +01002151 _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
Willy Tarreaub54c40a2018-12-02 19:28:41 +01002152 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002153 }
Olivier Houcharda798bf52019-03-08 18:52:00 +01002154 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002155
2156 return_srv_prx_502:
2157 rep->analysers &= AN_RES_FLT_END;
2158 txn->status = 502;
2159 s->logs.t_data = -1; /* was not a valid response */
2160 s->si[1].flags |= SI_FL_NOLINGER;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01002161 htx_reply_and_close(s, txn->status, htx_error_message(s));
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002162 if (!(s->flags & SF_ERR_MASK))
2163 s->flags |= SF_ERR_PRXCOND;
2164 if (!(s->flags & SF_FINST_MASK))
2165 s->flags |= SF_FINST_H;
Christopher Fauletf6df2b42020-03-02 16:21:01 +01002166
2167 s->req.analysers &= AN_REQ_FLT_END;
2168 rep->analyse_exp = TICK_ETERNITY;
Christopher Fauletfec7bd12018-10-24 11:17:50 +02002169 return 0;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002170}
2171
2172/* This function is an analyser which forwards response body (including chunk
2173 * sizes if any). It is called as soon as we must forward, even if we forward
2174 * zero byte. The only situation where it must not be called is when we're in
2175 * tunnel mode and we want to forward till the close. It's used both to forward
2176 * remaining data and to resync after end of body. It expects the msg_state to
2177 * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
2178 * read more data, or 1 once we can go on with next request or end the stream.
2179 *
2180 * It is capable of compressing response data both in content-length mode and
2181 * in chunked mode. The state machines follows different flows depending on
2182 * whether content-length and chunked modes are used, since there are no
2183 * trailers in content-length :
2184 *
2185 * chk-mode cl-mode
2186 * ,----- BODY -----.
2187 * / \
2188 * V size > 0 V chk-mode
2189 * .--> SIZE -------------> DATA -------------> CRLF
2190 * | | size == 0 | last byte |
2191 * | v final crlf v inspected |
2192 * | TRAILERS -----------> DONE |
2193 * | |
2194 * `----------------------------------------------'
2195 *
2196 * Compression only happens in the DATA state, and must be flushed in final
2197 * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
2198 * is performed at once on final states for all bytes parsed, or when leaving
2199 * on missing data.
2200 */
2201int htx_response_forward_body(struct stream *s, struct channel *res, int an_bit)
2202{
2203 struct session *sess = s->sess;
2204 struct http_txn *txn = s->txn;
2205 struct http_msg *msg = &s->txn->rsp;
Christopher Faulet9768c262018-10-22 09:34:31 +02002206 struct htx *htx;
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002207 int ret;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002208
2209 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
2210 now_ms, __FUNCTION__,
2211 s,
2212 res,
2213 res->rex, res->wex,
2214 res->flags,
2215 ci_data(res),
2216 res->analysers);
2217
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002218 htx = htxbuf(&res->buf);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002219
2220 if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
Christopher Fauletf2824e62018-10-01 12:12:37 +02002221 ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002222 /* Output closed while we were sending data. We must abort and
2223 * wake the other side up.
2224 */
2225 msg->err_state = msg->msg_state;
2226 msg->msg_state = HTTP_MSG_ERROR;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002227 htx_end_response(s);
2228 htx_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002229 return 1;
2230 }
2231
Christopher Faulet9768c262018-10-22 09:34:31 +02002232 if (msg->msg_state == HTTP_MSG_BODY)
2233 msg->msg_state = HTTP_MSG_DATA;
2234
Christopher Faulete0768eb2018-10-03 16:38:02 +02002235 /* in most states, we should abort in case of early close */
2236 channel_auto_close(res);
2237
Christopher Faulete0768eb2018-10-03 16:38:02 +02002238 if (res->to_forward) {
Christopher Faulet66af0b22019-03-22 14:54:52 +01002239 if (res->to_forward == CHN_INFINITE_FORWARD) {
Christopher Fauletbe7c5522019-11-15 16:31:46 +01002240 if (res->flags & CF_EOI)
2241 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet66af0b22019-03-22 14:54:52 +01002242 }
2243 else {
2244 /* We can't process the buffer's contents yet */
2245 res->flags |= CF_WAKE_WRITE;
2246 goto missing_data_or_waiting;
2247 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002248 }
2249
Christopher Fauletbe7c5522019-11-15 16:31:46 +01002250 if (msg->msg_state >= HTTP_MSG_ENDING)
2251 goto ending;
2252
2253 if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 ||
2254 (!(msg->flags & HTTP_MSGF_XFER_LEN) && !HAS_RSP_DATA_FILTERS(s))) {
2255 msg->msg_state = HTTP_MSG_ENDING;
2256 goto ending;
2257 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002258
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002259 /* Forward input data. We get it by removing all outgoing data not
2260 * forwarded yet from HTX data size. If there are some data filters, we
2261 * let them decide the amount of data to forward.
Christopher Faulet9768c262018-10-22 09:34:31 +02002262 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002263 if (HAS_RSP_DATA_FILTERS(s)) {
2264 ret = flt_http_payload(s, msg, htx->data);
2265 if (ret < 0)
2266 goto return_bad_res;
Christopher Faulet421e7692019-06-13 11:16:45 +02002267 c_adv(res, ret);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002268 }
2269 else {
Christopher Faulet421e7692019-06-13 11:16:45 +02002270 c_adv(res, htx->data - co_data(res));
Christopher Faulet66af0b22019-03-22 14:54:52 +01002271 if (msg->flags & HTTP_MSGF_XFER_LEN)
2272 channel_htx_forward_forever(res, htx);
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002273 }
Christopher Faulet9768c262018-10-22 09:34:31 +02002274
Christopher Fauletbe7c5522019-11-15 16:31:46 +01002275 if (htx->data != co_data(res))
2276 goto missing_data_or_waiting;
2277
2278 if (!(msg->flags & HTTP_MSGF_XFER_LEN) && res->flags & CF_SHUTR) {
2279 msg->msg_state = HTTP_MSG_ENDING;
2280 goto ending;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002281 }
2282
Christopher Faulet9768c262018-10-22 09:34:31 +02002283 /* Check if the end-of-message is reached and if so, switch the message
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002284 * in HTTP_MSG_ENDING state. Then if all data was marked to be
2285 * forwarded, set the state to HTTP_MSG_DONE.
Christopher Faulet9768c262018-10-22 09:34:31 +02002286 */
2287 if (htx_get_tail_type(htx) != HTX_BLK_EOM)
2288 goto missing_data_or_waiting;
2289
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002290 msg->msg_state = HTTP_MSG_ENDING;
Christopher Faulet9768c262018-10-22 09:34:31 +02002291
Christopher Fauletbe7c5522019-11-15 16:31:46 +01002292 ending:
2293 /* other states, ENDING...TUNNEL */
2294 if (msg->msg_state >= HTTP_MSG_DONE)
2295 goto done;
Christopher Faulet9768c262018-10-22 09:34:31 +02002296
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002297 if (HAS_RSP_DATA_FILTERS(s)) {
2298 ret = flt_http_end(s, msg);
2299 if (ret <= 0) {
2300 if (!ret)
2301 goto missing_data_or_waiting;
2302 goto return_bad_res;
2303 }
2304 }
2305
Christopher Fauletbe7c5522019-11-15 16:31:46 +01002306 if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 ||
2307 !(msg->flags & HTTP_MSGF_XFER_LEN)) {
2308 msg->msg_state = HTTP_MSG_TUNNEL;
2309 goto ending;
2310 }
2311 else {
2312 msg->msg_state = HTTP_MSG_DONE;
2313 res->to_forward = 0;
2314 }
2315
2316 done:
2317
2318 channel_dont_close(res);
2319
Christopher Fauletf2824e62018-10-01 12:12:37 +02002320 htx_end_response(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002321 if (!(res->analysers & an_bit)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02002322 htx_end_request(s);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002323 if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
2324 if (res->flags & CF_SHUTW) {
2325 /* response errors are most likely due to the
2326 * client aborting the transfer. */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002327 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002328 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002329 goto return_bad_res;
2330 }
2331 return 1;
2332 }
2333 return 0;
2334
2335 missing_data_or_waiting:
2336 if (res->flags & CF_SHUTW)
Christopher Faulet93e02d82019-03-08 14:18:50 +01002337 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002338
Christopher Faulet47365272018-10-31 17:40:50 +01002339 if (htx->flags & HTX_FL_PARSING_ERROR)
2340 goto return_bad_res;
2341
Christopher Faulete0768eb2018-10-03 16:38:02 +02002342 /* stop waiting for data if the input is closed before the end. If the
2343 * client side was already closed, it means that the client has aborted,
2344 * so we don't want to count this as a server abort. Otherwise it's a
2345 * server abort.
2346 */
Christopher Fauletd20fdb02019-06-13 16:43:22 +02002347 if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) {
Christopher Faulete0768eb2018-10-03 16:38:02 +02002348 if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002349 goto return_cli_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002350 /* If we have some pending data, we continue the processing */
Christopher Faulet93e02d82019-03-08 14:18:50 +01002351 if (htx_is_empty(htx))
2352 goto return_srv_abort;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002353 }
2354
Christopher Faulete0768eb2018-10-03 16:38:02 +02002355 /* When TE: chunked is used, we need to get there again to parse
2356 * remaining chunks even if the server has closed, so we don't want to
Christopher Faulet9768c262018-10-22 09:34:31 +02002357 * set CF_DONTCLOSE. Similarly when there is a content-leng or if there
2358 * are filters registered on the stream, we don't want to forward a
2359 * close
Christopher Faulete0768eb2018-10-03 16:38:02 +02002360 */
Christopher Fauletaed82cf2018-11-30 22:22:32 +01002361 if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s))
Christopher Faulete0768eb2018-10-03 16:38:02 +02002362 channel_dont_close(res);
2363
2364 /* We know that more data are expected, but we couldn't send more that
2365 * what we did. So we always set the CF_EXPECT_MORE flag so that the
2366 * system knows it must not set a PUSH on this first part. Interactive
2367 * modes are already handled by the stream sock layer. We must not do
2368 * this in content-length mode because it could present the MSG_MORE
2369 * flag with the last block of forwarded data, which would cause an
2370 * additional delay to be observed by the receiver.
2371 */
2372 if ((msg->flags & HTTP_MSGF_TE_CHNK) || (msg->flags & HTTP_MSGF_COMPRESSING))
2373 res->flags |= CF_EXPECT_MORE;
2374
2375 /* the stream handler will take care of timeouts and errors */
2376 return 0;
2377
Christopher Faulet93e02d82019-03-08 14:18:50 +01002378 return_srv_abort:
2379 _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
2380 _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002381 if (objt_server(s->target))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002382 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1);
2383 if (!(s->flags & SF_ERR_MASK))
2384 s->flags |= SF_ERR_SRVCL;
2385 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002386
Christopher Faulet93e02d82019-03-08 14:18:50 +01002387 return_cli_abort:
2388 _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
2389 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002390 if (objt_server(s->target))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002391 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
2392 if (!(s->flags & SF_ERR_MASK))
2393 s->flags |= SF_ERR_CLICL;
2394 goto return_error;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002395
Christopher Faulet93e02d82019-03-08 14:18:50 +01002396 return_bad_res:
2397 _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
2398 if (objt_server(s->target)) {
2399 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_resp, 1);
2400 health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
2401 }
Christopher Faulete0768eb2018-10-03 16:38:02 +02002402 if (!(s->flags & SF_ERR_MASK))
Christopher Faulet93e02d82019-03-08 14:18:50 +01002403 s->flags |= SF_ERR_SRVCL;
Christopher Faulete0768eb2018-10-03 16:38:02 +02002404
Christopher Faulet93e02d82019-03-08 14:18:50 +01002405 return_error:
Christopher Faulete0768eb2018-10-03 16:38:02 +02002406 txn->rsp.err_state = txn->rsp.msg_state;
2407 txn->rsp.msg_state = HTTP_MSG_ERROR;
2408 /* don't send any error message as we're in the body */
Christopher Faulet9768c262018-10-22 09:34:31 +02002409 htx_reply_and_close(s, txn->status, NULL);
Christopher Faulete0768eb2018-10-03 16:38:02 +02002410 res->analysers &= AN_RES_FLT_END;
2411 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 +02002412 if (!(s->flags & SF_FINST_MASK))
2413 s->flags |= SF_FINST_D;
2414 return 0;
2415}
2416
Christopher Fauletf2824e62018-10-01 12:12:37 +02002417/* Perform an HTTP redirect based on the information in <rule>. The function
Christopher Faulet99daf282018-11-28 22:58:13 +01002418 * returns zero on success, or zero in case of a, irrecoverable error such
Christopher Fauletf2824e62018-10-01 12:12:37 +02002419 * as too large a request to build a valid response.
2420 */
2421int htx_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
2422{
Christopher Faulet99daf282018-11-28 22:58:13 +01002423 struct channel *req = &s->req;
2424 struct channel *res = &s->res;
2425 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01002426 struct htx_sl *sl;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002427 struct buffer *chunk;
Christopher Faulet99daf282018-11-28 22:58:13 +01002428 struct ist status, reason, location;
2429 unsigned int flags;
2430 size_t data;
Christopher Faulet08e66462019-05-23 16:44:59 +02002431 int close = 0; /* Try to keep the connection alive byt default */
Christopher Fauletf2824e62018-10-01 12:12:37 +02002432
2433 chunk = alloc_trash_chunk();
2434 if (!chunk)
Christopher Faulet99daf282018-11-28 22:58:13 +01002435 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002436
Christopher Faulet99daf282018-11-28 22:58:13 +01002437 /*
2438 * Create the location
2439 */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002440 htx = htxbuf(&req->buf);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002441 switch(rule->type) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002442 case REDIRECT_TYPE_SCHEME: {
2443 struct http_hdr_ctx ctx;
2444 struct ist path, host;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002445
Christopher Faulet99daf282018-11-28 22:58:13 +01002446 host = ist("");
2447 ctx.blk = NULL;
2448 if (http_find_header(htx, ist("Host"), &ctx, 0))
2449 host = ctx.value;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002450
Christopher Faulet297fbb42019-05-13 14:41:27 +02002451 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002452 path = http_get_path(htx_sl_req_uri(sl));
2453 /* build message using path */
2454 if (path.ptr) {
2455 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2456 int qs = 0;
2457 while (qs < path.len) {
2458 if (*(path.ptr + qs) == '?') {
2459 path.len = qs;
2460 break;
2461 }
2462 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002463 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002464 }
2465 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002466 else
2467 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002468
Christopher Faulet99daf282018-11-28 22:58:13 +01002469 if (rule->rdr_str) { /* this is an old "redirect" rule */
2470 /* add scheme */
2471 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2472 goto fail;
2473 }
2474 else {
2475 /* add scheme with executing log format */
2476 chunk->data += build_logline(s, chunk->area + chunk->data,
2477 chunk->size - chunk->data,
2478 &rule->rdr_fmt);
2479 }
2480 /* add "://" + host + path */
2481 if (!chunk_memcat(chunk, "://", 3) ||
2482 !chunk_memcat(chunk, host.ptr, host.len) ||
2483 !chunk_memcat(chunk, path.ptr, path.len))
2484 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002485
Christopher Faulet99daf282018-11-28 22:58:13 +01002486 /* append a slash at the end of the location if needed and missing */
2487 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2488 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2489 if (chunk->data + 1 >= chunk->size)
2490 goto fail;
2491 chunk->area[chunk->data++] = '/';
2492 }
2493 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002494 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002495
Christopher Faulet99daf282018-11-28 22:58:13 +01002496 case REDIRECT_TYPE_PREFIX: {
2497 struct ist path;
2498
Christopher Faulet297fbb42019-05-13 14:41:27 +02002499 sl = http_get_stline(htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002500 path = http_get_path(htx_sl_req_uri(sl));
2501 /* build message using path */
2502 if (path.ptr) {
2503 if (rule->flags & REDIRECT_FLAG_DROP_QS) {
2504 int qs = 0;
2505 while (qs < path.len) {
2506 if (*(path.ptr + qs) == '?') {
2507 path.len = qs;
2508 break;
2509 }
2510 qs++;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002511 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002512 }
2513 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002514 else
2515 path = ist("/");
Christopher Fauletf2824e62018-10-01 12:12:37 +02002516
Christopher Faulet99daf282018-11-28 22:58:13 +01002517 if (rule->rdr_str) { /* this is an old "redirect" rule */
2518 /* add prefix. Note that if prefix == "/", we don't want to
2519 * add anything, otherwise it makes it hard for the user to
2520 * configure a self-redirection.
2521 */
2522 if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
2523 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2524 goto fail;
2525 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002526 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002527 else {
2528 /* add prefix with executing log format */
2529 chunk->data += build_logline(s, chunk->area + chunk->data,
2530 chunk->size - chunk->data,
2531 &rule->rdr_fmt);
2532 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002533
Christopher Faulet99daf282018-11-28 22:58:13 +01002534 /* add path */
2535 if (!chunk_memcat(chunk, path.ptr, path.len))
2536 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002537
Christopher Faulet99daf282018-11-28 22:58:13 +01002538 /* append a slash at the end of the location if needed and missing */
2539 if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
2540 (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
2541 if (chunk->data + 1 >= chunk->size)
2542 goto fail;
2543 chunk->area[chunk->data++] = '/';
2544 }
2545 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002546 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002547 case REDIRECT_TYPE_LOCATION:
2548 default:
2549 if (rule->rdr_str) { /* this is an old "redirect" rule */
2550 /* add location */
2551 if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len))
2552 goto fail;
2553 }
2554 else {
2555 /* add location with executing log format */
2556 chunk->data += build_logline(s, chunk->area + chunk->data,
2557 chunk->size - chunk->data,
2558 &rule->rdr_fmt);
2559 }
2560 break;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002561 }
Christopher Faulet99daf282018-11-28 22:58:13 +01002562 location = ist2(chunk->area, chunk->data);
2563
2564 /*
2565 * Create the 30x response
2566 */
2567 switch (rule->code) {
2568 case 308:
2569 status = ist("308");
2570 reason = ist("Permanent Redirect");
2571 break;
2572 case 307:
2573 status = ist("307");
2574 reason = ist("Temporary Redirect");
2575 break;
2576 case 303:
2577 status = ist("303");
2578 reason = ist("See Other");
2579 break;
2580 case 301:
2581 status = ist("301");
2582 reason = ist("Moved Permanently");
2583 break;
2584 case 302:
2585 default:
2586 status = ist("302");
2587 reason = ist("Found");
2588 break;
2589 }
2590
Christopher Faulet08e66462019-05-23 16:44:59 +02002591 if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE)
2592 close = 1;
2593
Christopher Faulet99daf282018-11-28 22:58:13 +01002594 htx = htx_from_buf(&res->buf);
Kevin Zhu0fd70882020-01-07 09:42:55 +01002595 /* Trim any possible response */
2596 channel_htx_truncate(&s->res, htx);
Christopher Faulet99daf282018-11-28 22:58:13 +01002597 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2598 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason);
2599 if (!sl)
2600 goto fail;
2601 sl->info.res.status = rule->code;
2602 s->txn->status = rule->code;
2603
Christopher Faulet08e66462019-05-23 16:44:59 +02002604 if (close && !htx_add_header(htx, ist("Connection"), ist("close")))
2605 goto fail;
2606
2607 if (!htx_add_header(htx, ist("Content-length"), ist("0")) ||
Christopher Faulet99daf282018-11-28 22:58:13 +01002608 !htx_add_header(htx, ist("Location"), location))
2609 goto fail;
2610
2611 if (rule->code == 302 || rule->code == 303 || rule->code == 307) {
2612 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")))
2613 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002614 }
2615
2616 if (rule->cookie_len) {
Christopher Faulet99daf282018-11-28 22:58:13 +01002617 if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len)))
2618 goto fail;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002619 }
2620
Christopher Faulet99daf282018-11-28 22:58:13 +01002621 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
2622 goto fail;
2623
Kevin Zhu0fd70882020-01-07 09:42:55 +01002624 htx_to_buf(htx, &res->buf);
2625
Christopher Faulet99daf282018-11-28 22:58:13 +01002626 data = htx->data - co_data(res);
Christopher Faulet99daf282018-11-28 22:58:13 +01002627 c_adv(res, data);
2628 res->total += data;
2629
2630 channel_auto_read(req);
2631 channel_abort(req);
2632 channel_auto_close(req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002633 channel_htx_erase(req, htxbuf(&req->buf));
Christopher Faulet99daf282018-11-28 22:58:13 +01002634
2635 res->wex = tick_add_ifset(now_ms, res->wto);
2636 channel_auto_read(res);
2637 channel_auto_close(res);
2638 channel_shutr_now(res);
Christopher Faulet7d84db32020-01-28 09:18:10 +01002639 if (rule->flags & REDIRECT_FLAG_FROM_REQ) {
2640 /* let's log the request time */
2641 s->logs.tv_request = now;
2642 req->analysers &= AN_REQ_FLT_END;
Christopher Faulet99daf282018-11-28 22:58:13 +01002643
Christopher Faulet7d84db32020-01-28 09:18:10 +01002644 if (s->sess->fe == s->be) /* report it if the request was intercepted by the frontend */
2645 _HA_ATOMIC_ADD(&s->sess->fe->fe_counters.intercepted_req, 1);
2646 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02002647
2648 if (!(s->flags & SF_ERR_MASK))
2649 s->flags |= SF_ERR_LOCAL;
2650 if (!(s->flags & SF_FINST_MASK))
Christopher Faulet7d84db32020-01-28 09:18:10 +01002651 s->flags |= ((rule->flags & REDIRECT_FLAG_FROM_REQ) ? SF_FINST_R : SF_FINST_H);
Christopher Fauletf2824e62018-10-01 12:12:37 +02002652
Christopher Faulet99daf282018-11-28 22:58:13 +01002653 free_trash_chunk(chunk);
2654 return 1;
2655
2656 fail:
2657 /* If an error occurred, remove the incomplete HTTP response from the
2658 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002659 channel_htx_truncate(res, htxbuf(&res->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02002660 free_trash_chunk(chunk);
Christopher Faulet99daf282018-11-28 22:58:13 +01002661 return 0;
Christopher Fauletf2824e62018-10-01 12:12:37 +02002662}
2663
Christopher Faulet72333522018-10-24 11:25:02 +02002664int htx_transform_header_str(struct stream* s, struct channel *chn, struct htx *htx,
2665 struct ist name, const char *str, struct my_regex *re, int action)
2666{
2667 struct http_hdr_ctx ctx;
2668 struct buffer *output = get_trash_chunk();
2669
2670 /* find full header is action is ACT_HTTP_REPLACE_HDR */
2671 ctx.blk = NULL;
2672 while (http_find_header(htx, name, &ctx, (action == ACT_HTTP_REPLACE_HDR))) {
2673 if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0))
2674 continue;
2675
2676 output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch);
2677 if (output->data == -1)
2678 return -1;
2679 if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data)))
2680 return -1;
2681 }
2682 return 0;
2683}
2684
2685static int htx_transform_header(struct stream* s, struct channel *chn, struct htx *htx,
2686 const struct ist name, struct list *fmt, struct my_regex *re, int action)
2687{
2688 struct buffer *replace;
2689 int ret = -1;
2690
2691 replace = alloc_trash_chunk();
2692 if (!replace)
2693 goto leave;
2694
2695 replace->data = build_logline(s, replace->area, replace->size, fmt);
2696 if (replace->data >= replace->size - 1)
2697 goto leave;
2698
2699 ret = htx_transform_header_str(s, chn, htx, name, replace->area, re, action);
2700
2701 leave:
2702 free_trash_chunk(replace);
2703 return ret;
2704}
2705
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002706
2707/* Terminate a 103-Erly-hints response and send it to the client. It returns 0
2708 * on success and -1 on error. The response channel is updated accordingly.
2709 */
2710static int htx_reply_103_early_hints(struct channel *res)
2711{
2712 struct htx *htx = htx_from_buf(&res->buf);
2713 size_t data;
2714
Christopher Faulet9869f932019-06-26 14:23:54 +02002715 if (!htx_add_endof(htx, HTX_BLK_EOH)) {
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002716 /* If an error occurred during an Early-hint rule,
2717 * remove the incomplete HTTP 103 response from the
2718 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002719 channel_htx_truncate(res, htx);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002720 return -1;
2721 }
2722
2723 data = htx->data - co_data(res);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002724 c_adv(res, data);
2725 res->total += data;
2726 return 0;
2727}
2728
Christopher Faulet6eb92892018-11-15 16:39:29 +01002729/*
2730 * Build an HTTP Early Hint HTTP 103 response header with <name> as name and with a value
2731 * built according to <fmt> log line format.
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002732 * If <early_hints> is 0, it is starts a new response by adding the start
2733 * line. If an error occurred -1 is returned. On success 0 is returned. The
2734 * channel is not updated here. It must be done calling the function
2735 * htx_reply_103_early_hints().
Christopher Faulet6eb92892018-11-15 16:39:29 +01002736 */
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002737static 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 +01002738{
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002739 struct channel *res = &s->res;
2740 struct htx *htx = htx_from_buf(&res->buf);
2741 struct buffer *value = alloc_trash_chunk();
2742
Christopher Faulet6eb92892018-11-15 16:39:29 +01002743 if (!early_hints) {
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002744 struct htx_sl *sl;
2745 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
2746 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
2747
2748 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
2749 ist("HTTP/1.1"), ist("103"), ist("Early Hints"));
2750 if (!sl)
Christopher Faulet6eb92892018-11-15 16:39:29 +01002751 goto fail;
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002752 sl->info.res.status = 103;
Christopher Faulet6eb92892018-11-15 16:39:29 +01002753 }
2754
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002755 value->data = build_logline(s, b_tail(value), b_room(value), fmt);
2756 if (!htx_add_header(htx, name, ist2(b_head(value), b_data(value))))
Christopher Faulet6eb92892018-11-15 16:39:29 +01002757 goto fail;
2758
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002759 free_trash_chunk(value);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002760 return 1;
Christopher Faulet6eb92892018-11-15 16:39:29 +01002761
2762 fail:
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002763 /* If an error occurred during an Early-hint rule, remove the incomplete
2764 * HTTP 103 response from the buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01002765 channel_htx_truncate(res, htx);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002766 free_trash_chunk(value);
2767 return -1;
Christopher Faulet6eb92892018-11-15 16:39:29 +01002768}
2769
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002770/* This function executes one of the set-{method,path,query,uri} actions. It
2771 * takes the string from the variable 'replace' with length 'len', then modifies
2772 * the relevant part of the request line accordingly. Then it updates various
2773 * pointers to the next elements which were moved, and the total buffer length.
2774 * It finds the action to be performed in p[2], previously filled by function
2775 * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
2776 * error, though this can be revisited when this code is finally exploited.
2777 *
2778 * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
2779 * query string and 3 to replace uri.
2780 *
2781 * In query string case, the mark question '?' must be set at the start of the
2782 * string by the caller, event if the replacement query string is empty.
2783 */
2784int htx_req_replace_stline(int action, const char *replace, int len,
2785 struct proxy *px, struct stream *s)
2786{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002787 struct htx *htx = htxbuf(&s->req.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002788
2789 switch (action) {
2790 case 0: // method
2791 if (!http_replace_req_meth(htx, ist2(replace, len)))
2792 return -1;
2793 break;
2794
2795 case 1: // path
2796 if (!http_replace_req_path(htx, ist2(replace, len)))
2797 return -1;
2798 break;
2799
2800 case 2: // query
2801 if (!http_replace_req_query(htx, ist2(replace, len)))
2802 return -1;
2803 break;
2804
2805 case 3: // uri
2806 if (!http_replace_req_uri(htx, ist2(replace, len)))
2807 return -1;
2808 break;
2809
2810 default:
2811 return -1;
2812 }
2813 return 0;
2814}
2815
2816/* This function replace the HTTP status code and the associated message. The
2817 * variable <status> contains the new status code. This function never fails.
2818 */
2819void htx_res_set_status(unsigned int status, const char *reason, struct stream *s)
2820{
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002821 struct htx *htx = htxbuf(&s->res.buf);
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002822 char *res;
2823
2824 chunk_reset(&trash);
2825 res = ultoa_o(status, trash.area, trash.size);
2826 trash.data = res - trash.area;
2827
2828 /* Do we have a custom reason format string? */
2829 if (reason == NULL)
2830 reason = http_get_reason(status);
2831
Christopher Faulet87a2c0d2018-12-13 21:58:18 +01002832 if (http_replace_res_status(htx, ist2(trash.area, trash.data)))
Christopher Faulet8d8ac192018-10-24 11:27:39 +02002833 http_replace_res_reason(htx, ist2(reason, strlen(reason)));
2834}
2835
Christopher Faulet3e964192018-10-24 11:39:23 +02002836/* Executes the http-request rules <rules> for stream <s>, proxy <px> and
2837 * transaction <txn>. Returns the verdict of the first rule that prevents
2838 * further processing of the request (auth, deny, ...), and defaults to
2839 * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
2840 * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
2841 * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
2842 * and a deny/tarpit rule is matched, it will be filled with this rule's deny
2843 * status.
2844 */
2845static enum rule_result htx_req_get_intercept_rule(struct proxy *px, struct list *rules,
2846 struct stream *s, int *deny_status)
2847{
2848 struct session *sess = strm_sess(s);
2849 struct http_txn *txn = s->txn;
2850 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02002851 struct act_rule *rule;
2852 struct http_hdr_ctx ctx;
2853 const char *auth_realm;
Christopher Faulet3e964192018-10-24 11:39:23 +02002854 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
2855 int act_flags = 0;
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002856 int early_hints = 0;
Christopher Faulet3e964192018-10-24 11:39:23 +02002857
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01002858 htx = htxbuf(&s->req.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02002859
2860 /* If "the current_rule_list" match the executed rule list, we are in
2861 * resume condition. If a resume is needed it is always in the action
2862 * and never in the ACL or converters. In this case, we initialise the
2863 * current rule, and go to the action execution point.
2864 */
2865 if (s->current_rule) {
2866 rule = s->current_rule;
2867 s->current_rule = NULL;
2868 if (s->current_rule_list == rules)
2869 goto resume_execution;
2870 }
2871 s->current_rule_list = rules;
2872
2873 list_for_each_entry(rule, rules, list) {
2874 /* check optional condition */
2875 if (rule->cond) {
2876 int ret;
2877
2878 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
2879 ret = acl_pass(ret);
2880
2881 if (rule->cond->pol == ACL_COND_UNLESS)
2882 ret = !ret;
2883
2884 if (!ret) /* condition not matched */
2885 continue;
2886 }
2887
2888 act_flags |= ACT_FLAG_FIRST;
2889 resume_execution:
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01002890 if (early_hints && rule->action != ACT_HTTP_EARLY_HINT) {
2891 early_hints = 0;
2892 if (htx_reply_103_early_hints(&s->res) == -1) {
2893 rule_ret = HTTP_RULE_RES_BADREQ;
2894 goto end;
2895 }
2896 }
2897
Christopher Faulet3e964192018-10-24 11:39:23 +02002898 switch (rule->action) {
2899 case ACT_ACTION_ALLOW:
2900 rule_ret = HTTP_RULE_RES_STOP;
2901 goto end;
2902
2903 case ACT_ACTION_DENY:
2904 if (deny_status)
2905 *deny_status = rule->deny_status;
2906 rule_ret = HTTP_RULE_RES_DENY;
2907 goto end;
2908
2909 case ACT_HTTP_REQ_TARPIT:
2910 txn->flags |= TX_CLTARPIT;
2911 if (deny_status)
2912 *deny_status = rule->deny_status;
2913 rule_ret = HTTP_RULE_RES_DENY;
2914 goto end;
2915
2916 case ACT_HTTP_REQ_AUTH:
Christopher Faulet3e964192018-10-24 11:39:23 +02002917 /* Auth might be performed on regular http-req rules as well as on stats */
2918 auth_realm = rule->arg.auth.realm;
2919 if (!auth_realm) {
2920 if (px->uri_auth && rules == &px->uri_auth->http_req_rules)
2921 auth_realm = STATS_DEFAULT_REALM;
2922 else
2923 auth_realm = px->id;
2924 }
2925 /* send 401/407 depending on whether we use a proxy or not. We still
2926 * count one error, because normal browsing won't significantly
2927 * increase the counter but brute force attempts will.
2928 */
Christopher Faulet3e964192018-10-24 11:39:23 +02002929 rule_ret = HTTP_RULE_RES_ABRT;
Christopher Faulet12c51e22018-11-28 15:59:42 +01002930 if (htx_reply_40x_unauthorized(s, auth_realm) == -1)
2931 rule_ret = HTTP_RULE_RES_BADREQ;
2932 stream_inc_http_err_ctr(s);
Christopher Faulet3e964192018-10-24 11:39:23 +02002933 goto end;
2934
2935 case ACT_HTTP_REDIR:
Christopher Faulet3e964192018-10-24 11:39:23 +02002936 rule_ret = HTTP_RULE_RES_DONE;
2937 if (!htx_apply_redirect_rule(rule->arg.redir, s, txn))
2938 rule_ret = HTTP_RULE_RES_BADREQ;
2939 goto end;
2940
2941 case ACT_HTTP_SET_NICE:
2942 s->task->nice = rule->arg.nice;
2943 break;
2944
2945 case ACT_HTTP_SET_TOS:
Willy Tarreau1a18b542018-12-11 16:37:42 +01002946 conn_set_tos(objt_conn(sess->origin), rule->arg.tos);
Christopher Faulet3e964192018-10-24 11:39:23 +02002947 break;
2948
2949 case ACT_HTTP_SET_MARK:
Willy Tarreau1a18b542018-12-11 16:37:42 +01002950 conn_set_mark(objt_conn(sess->origin), rule->arg.mark);
Christopher Faulet3e964192018-10-24 11:39:23 +02002951 break;
2952
2953 case ACT_HTTP_SET_LOGL:
2954 s->logs.level = rule->arg.loglevel;
2955 break;
2956
2957 case ACT_HTTP_REPLACE_HDR:
2958 case ACT_HTTP_REPLACE_VAL:
2959 if (htx_transform_header(s, &s->req, htx,
2960 ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len),
2961 &rule->arg.hdr_add.fmt,
Dragan Dosen26743032019-04-30 15:54:36 +02002962 rule->arg.hdr_add.re, rule->action)) {
Christopher Faulet3e964192018-10-24 11:39:23 +02002963 rule_ret = HTTP_RULE_RES_BADREQ;
2964 goto end;
2965 }
2966 break;
2967
2968 case ACT_HTTP_DEL_HDR:
2969 /* remove all occurrences of the header */
2970 ctx.blk = NULL;
2971 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
2972 http_remove_header(htx, &ctx);
2973 break;
2974
2975 case ACT_HTTP_SET_HDR:
2976 case ACT_HTTP_ADD_HDR: {
2977 /* The scope of the trash buffer must be limited to this function. The
2978 * build_logline() function can execute a lot of other function which
2979 * can use the trash buffer. So for limiting the scope of this global
2980 * buffer, we build first the header value using build_logline, and
2981 * after we store the header name.
2982 */
2983 struct buffer *replace;
2984 struct ist n, v;
2985
2986 replace = alloc_trash_chunk();
2987 if (!replace) {
2988 rule_ret = HTTP_RULE_RES_BADREQ;
2989 goto end;
2990 }
2991
2992 replace->data = build_logline(s, replace->area, replace->size, &rule->arg.hdr_add.fmt);
2993 n = ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len);
2994 v = ist2(replace->area, replace->data);
2995
2996 if (rule->action == ACT_HTTP_SET_HDR) {
2997 /* remove all occurrences of the header */
2998 ctx.blk = NULL;
2999 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
3000 http_remove_header(htx, &ctx);
3001 }
3002
3003 if (!http_add_header(htx, n, v)) {
3004 static unsigned char rate_limit = 0;
3005
3006 if ((rate_limit++ & 255) == 0) {
3007 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);
3008 }
3009
Olivier Houcharda798bf52019-03-08 18:52:00 +01003010 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003011 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +01003012 _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003013 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01003014 _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003015 }
3016 free_trash_chunk(replace);
3017 break;
3018 }
3019
3020 case ACT_HTTP_DEL_ACL:
3021 case ACT_HTTP_DEL_MAP: {
3022 struct pat_ref *ref;
3023 struct buffer *key;
3024
3025 /* collect reference */
3026 ref = pat_ref_lookup(rule->arg.map.ref);
3027 if (!ref)
3028 continue;
3029
3030 /* allocate key */
3031 key = alloc_trash_chunk();
3032 if (!key) {
3033 rule_ret = HTTP_RULE_RES_BADREQ;
3034 goto end;
3035 }
3036
3037 /* collect key */
3038 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3039 key->area[key->data] = '\0';
3040
3041 /* perform update */
3042 /* returned code: 1=ok, 0=ko */
3043 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3044 pat_ref_delete(ref, key->area);
3045 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3046
3047 free_trash_chunk(key);
3048 break;
3049 }
3050
3051 case ACT_HTTP_ADD_ACL: {
3052 struct pat_ref *ref;
3053 struct buffer *key;
3054
3055 /* collect reference */
3056 ref = pat_ref_lookup(rule->arg.map.ref);
3057 if (!ref)
3058 continue;
3059
3060 /* allocate key */
3061 key = alloc_trash_chunk();
3062 if (!key) {
3063 rule_ret = HTTP_RULE_RES_BADREQ;
3064 goto end;
3065 }
3066
3067 /* collect key */
3068 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3069 key->area[key->data] = '\0';
3070
3071 /* perform update */
3072 /* add entry only if it does not already exist */
3073 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3074 if (pat_ref_find_elt(ref, key->area) == NULL)
3075 pat_ref_add(ref, key->area, NULL, NULL);
3076 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3077
3078 free_trash_chunk(key);
3079 break;
3080 }
3081
3082 case ACT_HTTP_SET_MAP: {
3083 struct pat_ref *ref;
3084 struct buffer *key, *value;
3085
3086 /* collect reference */
3087 ref = pat_ref_lookup(rule->arg.map.ref);
3088 if (!ref)
3089 continue;
3090
3091 /* allocate key */
3092 key = alloc_trash_chunk();
3093 if (!key) {
3094 rule_ret = HTTP_RULE_RES_BADREQ;
3095 goto end;
3096 }
3097
3098 /* allocate value */
3099 value = alloc_trash_chunk();
3100 if (!value) {
3101 free_trash_chunk(key);
3102 rule_ret = HTTP_RULE_RES_BADREQ;
3103 goto end;
3104 }
3105
3106 /* collect key */
3107 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3108 key->area[key->data] = '\0';
3109
3110 /* collect value */
3111 value->data = build_logline(s, value->area, value->size, &rule->arg.map.value);
3112 value->area[value->data] = '\0';
3113
3114 /* perform update */
Christopher Faulete84289e2019-04-19 14:50:55 +02003115 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003116 if (pat_ref_find_elt(ref, key->area) != NULL)
3117 /* update entry if it exists */
3118 pat_ref_set(ref, key->area, value->area, NULL);
3119 else
3120 /* insert a new entry */
3121 pat_ref_add(ref, key->area, value->area, NULL);
Christopher Faulete84289e2019-04-19 14:50:55 +02003122 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003123 free_trash_chunk(key);
3124 free_trash_chunk(value);
3125 break;
3126 }
3127
3128 case ACT_HTTP_EARLY_HINT:
3129 if (!(txn->req.flags & HTTP_MSGF_VER_11))
3130 break;
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01003131 early_hints = htx_add_early_hint_header(s, early_hints,
3132 ist2(rule->arg.early_hint.name, rule->arg.early_hint.name_len),
Christopher Faulet3e964192018-10-24 11:39:23 +02003133 &rule->arg.early_hint.fmt);
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01003134 if (early_hints == -1) {
3135 rule_ret = HTTP_RULE_RES_BADREQ;
Christopher Faulet3e964192018-10-24 11:39:23 +02003136 goto end;
3137 }
3138 break;
3139
3140 case ACT_CUSTOM:
3141 if ((s->req.flags & CF_READ_ERROR) ||
3142 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
Christopher Faulet3e964192018-10-24 11:39:23 +02003143 (px->options & PR_O_ABRT_CLOSE)))
3144 act_flags |= ACT_FLAG_FINAL;
3145
3146 switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) {
3147 case ACT_RET_ERR:
3148 case ACT_RET_CONT:
3149 break;
3150 case ACT_RET_STOP:
Christopher Faulet4629d082019-07-04 11:27:15 +02003151 rule_ret = HTTP_RULE_RES_STOP;
3152 goto end;
3153 case ACT_RET_DONE:
Christopher Faulet3e964192018-10-24 11:39:23 +02003154 rule_ret = HTTP_RULE_RES_DONE;
3155 goto end;
3156 case ACT_RET_YIELD:
3157 s->current_rule = rule;
3158 rule_ret = HTTP_RULE_RES_YIELD;
3159 goto end;
3160 }
3161 break;
3162
3163 case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX:
3164 /* Note: only the first valid tracking parameter of each
3165 * applies.
3166 */
3167
3168 if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) {
3169 struct stktable *t;
3170 struct stksess *ts;
3171 struct stktable_key *key;
3172 void *ptr1, *ptr2;
3173
3174 t = rule->arg.trk_ctr.table.t;
3175 key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
3176 rule->arg.trk_ctr.expr, NULL);
3177
3178 if (key && (ts = stktable_get_entry(t, key))) {
3179 stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts);
3180
3181 /* let's count a new HTTP request as it's the first time we do it */
3182 ptr1 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT);
3183 ptr2 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE);
3184 if (ptr1 || ptr2) {
3185 HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
3186
3187 if (ptr1)
3188 stktable_data_cast(ptr1, http_req_cnt)++;
3189
3190 if (ptr2)
3191 update_freq_ctr_period(&stktable_data_cast(ptr2, http_req_rate),
3192 t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1);
3193
3194 HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
3195
3196 /* If data was modified, we need to touch to re-schedule sync */
3197 stktable_touch_local(t, ts, 0);
3198 }
3199
3200 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
3201 if (sess->fe != s->be)
3202 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
3203 }
3204 }
3205 break;
3206
Joseph Herlantc42c0e92018-11-25 10:43:27 -08003207 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003208 default:
3209 break;
3210 }
3211 }
3212
3213 end:
3214 if (early_hints) {
Christopher Fauletee9b5bf2018-11-28 13:55:14 +01003215 if (htx_reply_103_early_hints(&s->res) == -1)
3216 rule_ret = HTTP_RULE_RES_BADREQ;
Christopher Faulet3e964192018-10-24 11:39:23 +02003217 }
3218
3219 /* we reached the end of the rules, nothing to report */
3220 return rule_ret;
3221}
3222
3223/* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
3224 * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
3225 * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
3226 * is returned, the process can continue the evaluation of next rule list. If
3227 * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
3228 * is returned, it means the operation could not be processed and a server error
3229 * must be returned. It may set the TX_SVDENY on txn->flags if it encounters a
3230 * deny rule. If *YIELD is returned, the caller must call again the function
3231 * with the same context.
3232 */
3233static enum rule_result htx_res_get_intercept_rule(struct proxy *px, struct list *rules,
3234 struct stream *s)
3235{
3236 struct session *sess = strm_sess(s);
3237 struct http_txn *txn = s->txn;
3238 struct htx *htx;
Christopher Faulet3e964192018-10-24 11:39:23 +02003239 struct act_rule *rule;
3240 struct http_hdr_ctx ctx;
3241 enum rule_result rule_ret = HTTP_RULE_RES_CONT;
3242 int act_flags = 0;
3243
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003244 htx = htxbuf(&s->res.buf);
Christopher Faulet3e964192018-10-24 11:39:23 +02003245
3246 /* If "the current_rule_list" match the executed rule list, we are in
3247 * resume condition. If a resume is needed it is always in the action
3248 * and never in the ACL or converters. In this case, we initialise the
3249 * current rule, and go to the action execution point.
3250 */
3251 if (s->current_rule) {
3252 rule = s->current_rule;
3253 s->current_rule = NULL;
3254 if (s->current_rule_list == rules)
3255 goto resume_execution;
3256 }
3257 s->current_rule_list = rules;
3258
3259 list_for_each_entry(rule, rules, list) {
3260 /* check optional condition */
3261 if (rule->cond) {
3262 int ret;
3263
3264 ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
3265 ret = acl_pass(ret);
3266
3267 if (rule->cond->pol == ACL_COND_UNLESS)
3268 ret = !ret;
3269
3270 if (!ret) /* condition not matched */
3271 continue;
3272 }
3273
3274 act_flags |= ACT_FLAG_FIRST;
3275resume_execution:
3276 switch (rule->action) {
3277 case ACT_ACTION_ALLOW:
3278 rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
3279 goto end;
3280
3281 case ACT_ACTION_DENY:
3282 txn->flags |= TX_SVDENY;
3283 rule_ret = HTTP_RULE_RES_STOP;
3284 goto end;
3285
3286 case ACT_HTTP_SET_NICE:
3287 s->task->nice = rule->arg.nice;
3288 break;
3289
3290 case ACT_HTTP_SET_TOS:
Willy Tarreau1a18b542018-12-11 16:37:42 +01003291 conn_set_tos(objt_conn(sess->origin), rule->arg.tos);
Christopher Faulet3e964192018-10-24 11:39:23 +02003292 break;
3293
3294 case ACT_HTTP_SET_MARK:
Willy Tarreau1a18b542018-12-11 16:37:42 +01003295 conn_set_mark(objt_conn(sess->origin), rule->arg.mark);
Christopher Faulet3e964192018-10-24 11:39:23 +02003296 break;
3297
3298 case ACT_HTTP_SET_LOGL:
3299 s->logs.level = rule->arg.loglevel;
3300 break;
3301
3302 case ACT_HTTP_REPLACE_HDR:
3303 case ACT_HTTP_REPLACE_VAL:
3304 if (htx_transform_header(s, &s->res, htx,
3305 ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len),
3306 &rule->arg.hdr_add.fmt,
Dragan Dosen26743032019-04-30 15:54:36 +02003307 rule->arg.hdr_add.re, rule->action)) {
Christopher Faulet3e964192018-10-24 11:39:23 +02003308 rule_ret = HTTP_RULE_RES_BADREQ;
3309 goto end;
3310 }
3311 break;
3312
3313 case ACT_HTTP_DEL_HDR:
3314 /* remove all occurrences of the header */
3315 ctx.blk = NULL;
3316 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
3317 http_remove_header(htx, &ctx);
3318 break;
3319
3320 case ACT_HTTP_SET_HDR:
3321 case ACT_HTTP_ADD_HDR: {
3322 struct buffer *replace;
3323 struct ist n, v;
3324
3325 replace = alloc_trash_chunk();
3326 if (!replace) {
3327 rule_ret = HTTP_RULE_RES_BADREQ;
3328 goto end;
3329 }
3330
3331 replace->data = build_logline(s, replace->area, replace->size, &rule->arg.hdr_add.fmt);
3332 n = ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len);
3333 v = ist2(replace->area, replace->data);
3334
3335 if (rule->action == ACT_HTTP_SET_HDR) {
3336 /* remove all occurrences of the header */
3337 ctx.blk = NULL;
3338 while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1))
3339 http_remove_header(htx, &ctx);
3340 }
3341
3342 if (!http_add_header(htx, n, v)) {
3343 static unsigned char rate_limit = 0;
3344
3345 if ((rate_limit++ & 255) == 0) {
3346 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);
3347 }
3348
Olivier Houcharda798bf52019-03-08 18:52:00 +01003349 _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003350 if (sess->fe != s->be)
Olivier Houcharda798bf52019-03-08 18:52:00 +01003351 _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003352 if (sess->listener->counters)
Olivier Houcharda798bf52019-03-08 18:52:00 +01003353 _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003354 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01003355 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_rewrites, 1);
Christopher Faulet3e964192018-10-24 11:39:23 +02003356 }
3357 free_trash_chunk(replace);
3358 break;
3359 }
3360
3361 case ACT_HTTP_DEL_ACL:
3362 case ACT_HTTP_DEL_MAP: {
3363 struct pat_ref *ref;
3364 struct buffer *key;
3365
3366 /* collect reference */
3367 ref = pat_ref_lookup(rule->arg.map.ref);
3368 if (!ref)
3369 continue;
3370
3371 /* allocate key */
3372 key = alloc_trash_chunk();
3373 if (!key) {
3374 rule_ret = HTTP_RULE_RES_BADREQ;
3375 goto end;
3376 }
3377
3378 /* collect key */
3379 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3380 key->area[key->data] = '\0';
3381
3382 /* perform update */
3383 /* returned code: 1=ok, 0=ko */
3384 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3385 pat_ref_delete(ref, key->area);
3386 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3387
3388 free_trash_chunk(key);
3389 break;
3390 }
3391
3392 case ACT_HTTP_ADD_ACL: {
3393 struct pat_ref *ref;
3394 struct buffer *key;
3395
3396 /* collect reference */
3397 ref = pat_ref_lookup(rule->arg.map.ref);
3398 if (!ref)
3399 continue;
3400
3401 /* allocate key */
3402 key = alloc_trash_chunk();
3403 if (!key) {
3404 rule_ret = HTTP_RULE_RES_BADREQ;
3405 goto end;
3406 }
3407
3408 /* collect key */
3409 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3410 key->area[key->data] = '\0';
3411
3412 /* perform update */
3413 /* check if the entry already exists */
Christopher Faulete84289e2019-04-19 14:50:55 +02003414 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003415 if (pat_ref_find_elt(ref, key->area) == NULL)
3416 pat_ref_add(ref, key->area, NULL, NULL);
Christopher Faulete84289e2019-04-19 14:50:55 +02003417 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
Christopher Faulet3e964192018-10-24 11:39:23 +02003418 free_trash_chunk(key);
3419 break;
3420 }
3421
3422 case ACT_HTTP_SET_MAP: {
3423 struct pat_ref *ref;
3424 struct buffer *key, *value;
3425
3426 /* collect reference */
3427 ref = pat_ref_lookup(rule->arg.map.ref);
3428 if (!ref)
3429 continue;
3430
3431 /* allocate key */
3432 key = alloc_trash_chunk();
3433 if (!key) {
3434 rule_ret = HTTP_RULE_RES_BADREQ;
3435 goto end;
3436 }
3437
3438 /* allocate value */
3439 value = alloc_trash_chunk();
3440 if (!value) {
3441 free_trash_chunk(key);
3442 rule_ret = HTTP_RULE_RES_BADREQ;
3443 goto end;
3444 }
3445
3446 /* collect key */
3447 key->data = build_logline(s, key->area, key->size, &rule->arg.map.key);
3448 key->area[key->data] = '\0';
3449
3450 /* collect value */
3451 value->data = build_logline(s, value->area, value->size, &rule->arg.map.value);
3452 value->area[value->data] = '\0';
3453
3454 /* perform update */
3455 HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
3456 if (pat_ref_find_elt(ref, key->area) != NULL)
3457 /* update entry if it exists */
3458 pat_ref_set(ref, key->area, value->area, NULL);
3459 else
3460 /* insert a new entry */
3461 pat_ref_add(ref, key->area, value->area, NULL);
3462 HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
3463 free_trash_chunk(key);
3464 free_trash_chunk(value);
3465 break;
3466 }
3467
3468 case ACT_HTTP_REDIR:
3469 rule_ret = HTTP_RULE_RES_DONE;
3470 if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
3471 rule_ret = HTTP_RULE_RES_BADREQ;
3472 goto end;
3473
3474 case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX:
3475 /* Note: only the first valid tracking parameter of each
3476 * applies.
3477 */
3478 if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) {
3479 struct stktable *t;
3480 struct stksess *ts;
3481 struct stktable_key *key;
3482 void *ptr;
3483
3484 t = rule->arg.trk_ctr.table.t;
3485 key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_RES | SMP_OPT_FINAL,
3486 rule->arg.trk_ctr.expr, NULL);
3487
3488 if (key && (ts = stktable_get_entry(t, key))) {
3489 stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts);
3490
3491 HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
3492
3493 /* let's count a new HTTP request as it's the first time we do it */
3494 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT);
3495 if (ptr)
3496 stktable_data_cast(ptr, http_req_cnt)++;
3497
3498 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE);
3499 if (ptr)
3500 update_freq_ctr_period(&stktable_data_cast(ptr, http_req_rate),
3501 t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1);
3502
3503 /* When the client triggers a 4xx from the server, it's most often due
3504 * to a missing object or permission. These events should be tracked
3505 * because if they happen often, it may indicate a brute force or a
3506 * vulnerability scan. Normally this is done when receiving the response
3507 * but here we're tracking after this ought to have been done so we have
3508 * to do it on purpose.
3509 */
3510 if ((unsigned)(txn->status - 400) < 100) {
3511 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_CNT);
3512 if (ptr)
3513 stktable_data_cast(ptr, http_err_cnt)++;
3514
3515 ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_RATE);
3516 if (ptr)
3517 update_freq_ctr_period(&stktable_data_cast(ptr, http_err_rate),
3518 t->data_arg[STKTABLE_DT_HTTP_ERR_RATE].u, 1);
3519 }
3520
3521 HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
3522
3523 /* If data was modified, we need to touch to re-schedule sync */
3524 stktable_touch_local(t, ts, 0);
3525
3526 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
3527 if (sess->fe != s->be)
3528 stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
3529 }
3530 }
3531 break;
3532
3533 case ACT_CUSTOM:
3534 if ((s->req.flags & CF_READ_ERROR) ||
3535 ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
Christopher Faulet3e964192018-10-24 11:39:23 +02003536 (px->options & PR_O_ABRT_CLOSE)))
3537 act_flags |= ACT_FLAG_FINAL;
3538
3539 switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) {
3540 case ACT_RET_ERR:
3541 case ACT_RET_CONT:
3542 break;
3543 case ACT_RET_STOP:
3544 rule_ret = HTTP_RULE_RES_STOP;
3545 goto end;
Christopher Faulet4629d082019-07-04 11:27:15 +02003546 case ACT_RET_DONE:
3547 rule_ret = HTTP_RULE_RES_DONE;
3548 goto end;
Christopher Faulet3e964192018-10-24 11:39:23 +02003549 case ACT_RET_YIELD:
3550 s->current_rule = rule;
3551 rule_ret = HTTP_RULE_RES_YIELD;
3552 goto end;
3553 }
3554 break;
3555
Joseph Herlantc42c0e92018-11-25 10:43:27 -08003556 /* other flags exists, but normally, they never be matched. */
Christopher Faulet3e964192018-10-24 11:39:23 +02003557 default:
3558 break;
3559 }
3560 }
3561
3562 end:
3563 /* we reached the end of the rules, nothing to report */
3564 return rule_ret;
3565}
3566
Christopher Faulet33640082018-10-24 11:53:01 +02003567/* Iterate the same filter through all request headers.
3568 * Returns 1 if this filter can be stopped upon return, otherwise 0.
3569 * Since it can manage the switch to another backend, it updates the per-proxy
3570 * DENY stats.
3571 */
3572static int htx_apply_filter_to_req_headers(struct stream *s, struct channel *req, struct hdr_exp *exp)
3573{
3574 struct http_txn *txn = s->txn;
3575 struct htx *htx;
3576 struct buffer *hdr = get_trash_chunk();
3577 int32_t pos;
3578
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003579 htx = htxbuf(&req->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003580
Christopher Fauleta3f15502019-05-13 15:27:23 +02003581 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet33640082018-10-24 11:53:01 +02003582 struct htx_blk *blk = htx_get_blk(htx, pos);
3583 enum htx_blk_type type;
3584 struct ist n, v;
3585
3586 next_hdr:
3587 type = htx_get_blk_type(blk);
3588 if (type == HTX_BLK_EOH)
3589 break;
3590 if (type != HTX_BLK_HDR)
3591 continue;
3592
3593 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
3594 return 1;
3595 else if (unlikely(txn->flags & TX_CLALLOW) &&
3596 (exp->action == ACT_ALLOW ||
3597 exp->action == ACT_DENY ||
3598 exp->action == ACT_TARPIT))
3599 return 0;
3600
3601 n = htx_get_blk_name(htx, blk);
3602 v = htx_get_blk_value(htx, blk);
3603
Christopher Faulet02e771a2019-02-26 15:36:05 +01003604 chunk_memcpy(hdr, n.ptr, n.len);
Christopher Faulet33640082018-10-24 11:53:01 +02003605 hdr->area[hdr->data++] = ':';
3606 hdr->area[hdr->data++] = ' ';
3607 chunk_memcat(hdr, v.ptr, v.len);
3608
3609 /* Now we have one header in <hdr> */
3610
3611 if (regex_exec_match2(exp->preg, hdr->area, hdr->data, MAX_MATCH, pmatch, 0)) {
3612 struct http_hdr_ctx ctx;
3613 int len;
3614
3615 switch (exp->action) {
3616 case ACT_ALLOW:
3617 txn->flags |= TX_CLALLOW;
3618 goto end;
3619
3620 case ACT_DENY:
3621 txn->flags |= TX_CLDENY;
3622 goto end;
3623
3624 case ACT_TARPIT:
3625 txn->flags |= TX_CLTARPIT;
3626 goto end;
3627
3628 case ACT_REPLACE:
3629 len = exp_replace(trash.area, trash.size, hdr->area, exp->replace, pmatch);
3630 if (len < 0)
3631 return -1;
3632
3633 http_parse_header(ist2(trash.area, len), &n, &v);
3634 ctx.blk = blk;
3635 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003636 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003637 if (!http_replace_header(htx, &ctx, n, v))
3638 return -1;
3639 if (!ctx.blk)
3640 goto end;
3641 pos = htx_get_blk_pos(htx, blk);
3642 break;
3643
3644 case ACT_REMOVE:
3645 ctx.blk = blk;
3646 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003647 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003648 if (!http_remove_header(htx, &ctx))
3649 return -1;
3650 if (!ctx.blk)
3651 goto end;
3652 pos = htx_get_blk_pos(htx, blk);
3653 goto next_hdr;
3654
3655 }
3656 }
3657 }
3658 end:
3659 return 0;
3660}
3661
3662/* Apply the filter to the request line.
3663 * Returns 0 if nothing has been done, 1 if the filter has been applied,
3664 * or -1 if a replacement resulted in an invalid request line.
3665 * Since it can manage the switch to another backend, it updates the per-proxy
3666 * DENY stats.
3667 */
3668static int htx_apply_filter_to_req_line(struct stream *s, struct channel *req, struct hdr_exp *exp)
3669{
3670 struct http_txn *txn = s->txn;
3671 struct htx *htx;
3672 struct buffer *reqline = get_trash_chunk();
3673 int done;
3674
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003675 htx = htxbuf(&req->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003676
3677 if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
3678 return 1;
3679 else if (unlikely(txn->flags & TX_CLALLOW) &&
3680 (exp->action == ACT_ALLOW ||
3681 exp->action == ACT_DENY ||
3682 exp->action == ACT_TARPIT))
3683 return 0;
3684 else if (exp->action == ACT_REMOVE)
3685 return 0;
3686
3687 done = 0;
3688
Christopher Faulet297fbb42019-05-13 14:41:27 +02003689 reqline->data = htx_fmt_req_line(http_get_stline(htx), reqline->area, reqline->size);
Christopher Faulet33640082018-10-24 11:53:01 +02003690
3691 /* Now we have the request line between cur_ptr and cur_end */
3692 if (regex_exec_match2(exp->preg, reqline->area, reqline->data, MAX_MATCH, pmatch, 0)) {
Christopher Faulet297fbb42019-05-13 14:41:27 +02003693 struct htx_sl *sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003694 struct ist meth, uri, vsn;
Christopher Faulet33640082018-10-24 11:53:01 +02003695 int len;
3696
3697 switch (exp->action) {
3698 case ACT_ALLOW:
3699 txn->flags |= TX_CLALLOW;
3700 done = 1;
3701 break;
3702
3703 case ACT_DENY:
3704 txn->flags |= TX_CLDENY;
3705 done = 1;
3706 break;
3707
3708 case ACT_TARPIT:
3709 txn->flags |= TX_CLTARPIT;
3710 done = 1;
3711 break;
3712
3713 case ACT_REPLACE:
3714 len = exp_replace(trash.area, trash.size, reqline->area, exp->replace, pmatch);
3715 if (len < 0)
3716 return -1;
3717
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003718 http_parse_stline(ist2(trash.area, len), &meth, &uri, &vsn);
3719 sl->info.req.meth = find_http_meth(meth.ptr, meth.len);
3720 if (!http_replace_stline(htx, meth, uri, vsn))
Christopher Faulet33640082018-10-24 11:53:01 +02003721 return -1;
3722 done = 1;
3723 break;
3724 }
3725 }
3726 return done;
3727}
3728
3729/*
3730 * Apply all the req filters of proxy <px> to all headers in buffer <req> of stream <s>.
3731 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
3732 * unparsable request. Since it can manage the switch to another backend, it
3733 * updates the per-proxy DENY stats.
3734 */
3735static int htx_apply_filters_to_request(struct stream *s, struct channel *req, struct proxy *px)
3736{
3737 struct session *sess = s->sess;
3738 struct http_txn *txn = s->txn;
3739 struct hdr_exp *exp;
3740
3741 for (exp = px->req_exp; exp; exp = exp->next) {
3742 int ret;
3743
3744 /*
3745 * The interleaving of transformations and verdicts
3746 * makes it difficult to decide to continue or stop
3747 * the evaluation.
3748 */
3749
3750 if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
3751 break;
3752
3753 if ((txn->flags & TX_CLALLOW) &&
3754 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
3755 exp->action == ACT_TARPIT || exp->action == ACT_PASS))
3756 continue;
3757
3758 /* if this filter had a condition, evaluate it now and skip to
3759 * next filter if the condition does not match.
3760 */
3761 if (exp->cond) {
3762 ret = acl_exec_cond(exp->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
3763 ret = acl_pass(ret);
3764 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
3765 ret = !ret;
3766
3767 if (!ret)
3768 continue;
3769 }
3770
3771 /* Apply the filter to the request line. */
3772 ret = htx_apply_filter_to_req_line(s, req, exp);
3773 if (unlikely(ret < 0))
3774 return -1;
3775
3776 if (likely(ret == 0)) {
3777 /* The filter did not match the request, it can be
3778 * iterated through all headers.
3779 */
3780 if (unlikely(htx_apply_filter_to_req_headers(s, req, exp) < 0))
3781 return -1;
3782 }
3783 }
3784 return 0;
3785}
3786
3787/* Iterate the same filter through all response headers contained in <res>.
3788 * Returns 1 if this filter can be stopped upon return, otherwise 0.
3789 */
3790static int htx_apply_filter_to_resp_headers(struct stream *s, struct channel *res, struct hdr_exp *exp)
3791{
3792 struct http_txn *txn = s->txn;
3793 struct htx *htx;
3794 struct buffer *hdr = get_trash_chunk();
3795 int32_t pos;
3796
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003797 htx = htxbuf(&res->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003798
Christopher Fauleta3f15502019-05-13 15:27:23 +02003799 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet33640082018-10-24 11:53:01 +02003800 struct htx_blk *blk = htx_get_blk(htx, pos);
3801 enum htx_blk_type type;
3802 struct ist n, v;
3803
3804 next_hdr:
3805 type = htx_get_blk_type(blk);
3806 if (type == HTX_BLK_EOH)
3807 break;
3808 if (type != HTX_BLK_HDR)
3809 continue;
3810
3811 if (unlikely(txn->flags & TX_SVDENY))
3812 return 1;
3813 else if (unlikely(txn->flags & TX_SVALLOW) &&
3814 (exp->action == ACT_ALLOW ||
3815 exp->action == ACT_DENY))
3816 return 0;
3817
3818 n = htx_get_blk_name(htx, blk);
3819 v = htx_get_blk_value(htx, blk);
3820
Christopher Faulet02e771a2019-02-26 15:36:05 +01003821 chunk_memcpy(hdr, n.ptr, n.len);
Christopher Faulet33640082018-10-24 11:53:01 +02003822 hdr->area[hdr->data++] = ':';
3823 hdr->area[hdr->data++] = ' ';
3824 chunk_memcat(hdr, v.ptr, v.len);
3825
3826 /* Now we have one header in <hdr> */
3827
3828 if (regex_exec_match2(exp->preg, hdr->area, hdr->data, MAX_MATCH, pmatch, 0)) {
3829 struct http_hdr_ctx ctx;
3830 int len;
3831
3832 switch (exp->action) {
3833 case ACT_ALLOW:
3834 txn->flags |= TX_SVALLOW;
3835 goto end;
3836 break;
3837
3838 case ACT_DENY:
3839 txn->flags |= TX_SVDENY;
3840 goto end;
3841 break;
3842
3843 case ACT_REPLACE:
3844 len = exp_replace(trash.area, trash.size, hdr->area, exp->replace, pmatch);
3845 if (len < 0)
3846 return -1;
3847
3848 http_parse_header(ist2(trash.area, len), &n, &v);
3849 ctx.blk = blk;
3850 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003851 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003852 if (!http_replace_header(htx, &ctx, n, v))
3853 return -1;
3854 if (!ctx.blk)
3855 goto end;
3856 pos = htx_get_blk_pos(htx, blk);
3857 break;
3858
3859 case ACT_REMOVE:
3860 ctx.blk = blk;
3861 ctx.value = v;
Christopher Faulet02e771a2019-02-26 15:36:05 +01003862 ctx.lws_before = ctx.lws_after = 0;
Christopher Faulet33640082018-10-24 11:53:01 +02003863 if (!http_remove_header(htx, &ctx))
3864 return -1;
3865 if (!ctx.blk)
3866 goto end;
3867 pos = htx_get_blk_pos(htx, blk);
3868 goto next_hdr;
3869 }
3870 }
3871
3872 }
3873 end:
3874 return 0;
3875}
3876
3877/* Apply the filter to the status line in the response buffer <res>.
3878 * Returns 0 if nothing has been done, 1 if the filter has been applied,
3879 * or -1 if a replacement resulted in an invalid status line.
3880 */
3881static int htx_apply_filter_to_sts_line(struct stream *s, struct channel *res, struct hdr_exp *exp)
3882{
3883 struct http_txn *txn = s->txn;
3884 struct htx *htx;
3885 struct buffer *resline = get_trash_chunk();
3886 int done;
3887
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003888 htx = htxbuf(&res->buf);
Christopher Faulet33640082018-10-24 11:53:01 +02003889
3890 if (unlikely(txn->flags & TX_SVDENY))
3891 return 1;
3892 else if (unlikely(txn->flags & TX_SVALLOW) &&
3893 (exp->action == ACT_ALLOW ||
3894 exp->action == ACT_DENY))
3895 return 0;
3896 else if (exp->action == ACT_REMOVE)
3897 return 0;
3898
3899 done = 0;
Christopher Faulet297fbb42019-05-13 14:41:27 +02003900 resline->data = htx_fmt_res_line(http_get_stline(htx), resline->area, resline->size);
Christopher Faulet33640082018-10-24 11:53:01 +02003901
3902 /* Now we have the status line between cur_ptr and cur_end */
3903 if (regex_exec_match2(exp->preg, resline->area, resline->data, MAX_MATCH, pmatch, 0)) {
Christopher Faulet297fbb42019-05-13 14:41:27 +02003904 struct htx_sl *sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003905 struct ist vsn, code, reason;
Christopher Faulet33640082018-10-24 11:53:01 +02003906 int len;
3907
3908 switch (exp->action) {
3909 case ACT_ALLOW:
3910 txn->flags |= TX_SVALLOW;
3911 done = 1;
3912 break;
3913
3914 case ACT_DENY:
3915 txn->flags |= TX_SVDENY;
3916 done = 1;
3917 break;
3918
3919 case ACT_REPLACE:
3920 len = exp_replace(trash.area, trash.size, resline->area, exp->replace, pmatch);
3921 if (len < 0)
3922 return -1;
3923
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01003924 http_parse_stline(ist2(trash.area, len), &vsn, &code, &reason);
3925 sl->info.res.status = strl2ui(code.ptr, code.len);
3926 if (!http_replace_stline(htx, vsn, code, reason))
Christopher Faulet33640082018-10-24 11:53:01 +02003927 return -1;
3928
3929 done = 1;
3930 return 1;
3931 }
3932 }
3933 return done;
3934}
3935
3936/*
3937 * Apply all the resp filters of proxy <px> to all headers in buffer <res> of stream <s>.
3938 * Returns 0 if everything is alright, or -1 in case a replacement lead to an
3939 * unparsable response.
3940 */
3941static int htx_apply_filters_to_response(struct stream *s, struct channel *res, struct proxy *px)
3942{
3943 struct session *sess = s->sess;
3944 struct http_txn *txn = s->txn;
3945 struct hdr_exp *exp;
3946
3947 for (exp = px->rsp_exp; exp; exp = exp->next) {
3948 int ret;
3949
3950 /*
3951 * The interleaving of transformations and verdicts
3952 * makes it difficult to decide to continue or stop
3953 * the evaluation.
3954 */
3955
3956 if (txn->flags & TX_SVDENY)
3957 break;
3958
3959 if ((txn->flags & TX_SVALLOW) &&
3960 (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
3961 exp->action == ACT_PASS)) {
3962 exp = exp->next;
3963 continue;
3964 }
3965
3966 /* if this filter had a condition, evaluate it now and skip to
3967 * next filter if the condition does not match.
3968 */
3969 if (exp->cond) {
3970 ret = acl_exec_cond(exp->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
3971 ret = acl_pass(ret);
3972 if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
3973 ret = !ret;
3974 if (!ret)
3975 continue;
3976 }
3977
3978 /* Apply the filter to the status line. */
3979 ret = htx_apply_filter_to_sts_line(s, res, exp);
3980 if (unlikely(ret < 0))
3981 return -1;
3982
3983 if (likely(ret == 0)) {
3984 /* The filter did not match the response, it can be
3985 * iterated through all headers.
3986 */
3987 if (unlikely(htx_apply_filter_to_resp_headers(s, res, exp) < 0))
3988 return -1;
3989 }
3990 }
3991 return 0;
3992}
3993
Christopher Fauletfcda7c62018-10-24 11:56:22 +02003994/*
3995 * Manage client-side cookie. It can impact performance by about 2% so it is
3996 * desirable to call it only when needed. This code is quite complex because
3997 * of the multiple very crappy and ambiguous syntaxes we have to support. it
3998 * highly recommended not to touch this part without a good reason !
3999 */
4000static void htx_manage_client_side_cookies(struct stream *s, struct channel *req)
4001{
4002 struct session *sess = s->sess;
4003 struct http_txn *txn = s->txn;
4004 struct htx *htx;
4005 struct http_hdr_ctx ctx;
4006 char *hdr_beg, *hdr_end, *del_from;
4007 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
4008 int preserve_hdr;
4009
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004010 htx = htxbuf(&req->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004011 ctx.blk = NULL;
4012 while (http_find_header(htx, ist("Cookie"), &ctx, 1)) {
Olivier Houchardfc7f52e2019-07-22 17:43:46 +02004013 int is_first = 1;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004014 del_from = NULL; /* nothing to be deleted */
4015 preserve_hdr = 0; /* assume we may kill the whole header */
4016
4017 /* Now look for cookies. Conforming to RFC2109, we have to support
4018 * attributes whose name begin with a '$', and associate them with
4019 * the right cookie, if we want to delete this cookie.
4020 * So there are 3 cases for each cookie read :
4021 * 1) it's a special attribute, beginning with a '$' : ignore it.
4022 * 2) it's a server id cookie that we *MAY* want to delete : save
4023 * some pointers on it (last semi-colon, beginning of cookie...)
4024 * 3) it's an application cookie : we *MAY* have to delete a previous
4025 * "special" cookie.
4026 * At the end of loop, if a "special" cookie remains, we may have to
4027 * remove it. If no application cookie persists in the header, we
4028 * *MUST* delete it.
4029 *
4030 * Note: RFC2965 is unclear about the processing of spaces around
4031 * the equal sign in the ATTR=VALUE form. A careful inspection of
4032 * the RFC explicitly allows spaces before it, and not within the
4033 * tokens (attrs or values). An inspection of RFC2109 allows that
4034 * too but section 10.1.3 lets one think that spaces may be allowed
4035 * after the equal sign too, resulting in some (rare) buggy
4036 * implementations trying to do that. So let's do what servers do.
4037 * Latest ietf draft forbids spaces all around. Also, earlier RFCs
4038 * allowed quoted strings in values, with any possible character
4039 * after a backslash, including control chars and delimitors, which
4040 * causes parsing to become ambiguous. Browsers also allow spaces
4041 * within values even without quotes.
4042 *
4043 * We have to keep multiple pointers in order to support cookie
4044 * removal at the beginning, middle or end of header without
4045 * corrupting the header. All of these headers are valid :
4046 *
4047 * hdr_beg hdr_end
4048 * | |
4049 * v |
4050 * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 |
4051 * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v
4052 * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3
4053 * | | | | | | |
4054 * | | | | | | |
4055 * | | | | | | +--> next
4056 * | | | | | +----> val_end
4057 * | | | | +-----------> val_beg
4058 * | | | +--------------> equal
4059 * | | +----------------> att_end
4060 * | +---------------------> att_beg
4061 * +--------------------------> prev
4062 *
4063 */
4064 hdr_beg = ctx.value.ptr;
4065 hdr_end = hdr_beg + ctx.value.len;
4066 for (prev = hdr_beg; prev < hdr_end; prev = next) {
4067 /* Iterate through all cookies on this line */
4068
4069 /* find att_beg */
4070 att_beg = prev;
Olivier Houchardfc7f52e2019-07-22 17:43:46 +02004071 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004072 att_beg++;
Olivier Houchardfc7f52e2019-07-22 17:43:46 +02004073 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004074
4075 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
4076 att_beg++;
4077
4078 /* find att_end : this is the first character after the last non
4079 * space before the equal. It may be equal to hdr_end.
4080 */
4081 equal = att_end = att_beg;
4082 while (equal < hdr_end) {
4083 if (*equal == '=' || *equal == ',' || *equal == ';')
4084 break;
4085 if (HTTP_IS_SPHT(*equal++))
4086 continue;
4087 att_end = equal;
4088 }
4089
4090 /* here, <equal> points to '=', a delimitor or the end. <att_end>
4091 * is between <att_beg> and <equal>, both may be identical.
4092 */
4093 /* look for end of cookie if there is an equal sign */
4094 if (equal < hdr_end && *equal == '=') {
4095 /* look for the beginning of the value */
4096 val_beg = equal + 1;
4097 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
4098 val_beg++;
4099
4100 /* find the end of the value, respecting quotes */
4101 next = http_find_cookie_value_end(val_beg, hdr_end);
4102
4103 /* make val_end point to the first white space or delimitor after the value */
4104 val_end = next;
4105 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
4106 val_end--;
4107 }
4108 else
4109 val_beg = val_end = next = equal;
4110
4111 /* We have nothing to do with attributes beginning with
4112 * '$'. However, they will automatically be removed if a
4113 * header before them is removed, since they're supposed
4114 * to be linked together.
4115 */
4116 if (*att_beg == '$')
4117 continue;
4118
4119 /* Ignore cookies with no equal sign */
4120 if (equal == next) {
4121 /* This is not our cookie, so we must preserve it. But if we already
4122 * scheduled another cookie for removal, we cannot remove the
4123 * complete header, but we can remove the previous block itself.
4124 */
4125 preserve_hdr = 1;
4126 if (del_from != NULL) {
4127 int delta = htx_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
4128 val_end += delta;
4129 next += delta;
4130 hdr_end += delta;
4131 prev = del_from;
4132 del_from = NULL;
4133 }
4134 continue;
4135 }
4136
4137 /* if there are spaces around the equal sign, we need to
4138 * strip them otherwise we'll get trouble for cookie captures,
4139 * or even for rewrites. Since this happens extremely rarely,
4140 * it does not hurt performance.
4141 */
4142 if (unlikely(att_end != equal || val_beg > equal + 1)) {
4143 int stripped_before = 0;
4144 int stripped_after = 0;
4145
4146 if (att_end != equal) {
4147 memmove(att_end, equal, hdr_end - equal);
4148 stripped_before = (att_end - equal);
4149 equal += stripped_before;
4150 val_beg += stripped_before;
4151 }
4152
4153 if (val_beg > equal + 1) {
4154 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
4155 stripped_after = (equal + 1) - val_beg;
4156 val_beg += stripped_after;
4157 stripped_before += stripped_after;
4158 }
4159
4160 val_end += stripped_before;
4161 next += stripped_before;
4162 hdr_end += stripped_before;
4163 }
4164 /* now everything is as on the diagram above */
4165
4166 /* First, let's see if we want to capture this cookie. We check
4167 * that we don't already have a client side cookie, because we
4168 * can only capture one. Also as an optimisation, we ignore
4169 * cookies shorter than the declared name.
4170 */
4171 if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
4172 (val_end - att_beg >= sess->fe->capture_namelen) &&
4173 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
4174 int log_len = val_end - att_beg;
4175
4176 if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
4177 ha_alert("HTTP logging : out of memory.\n");
4178 } else {
4179 if (log_len > sess->fe->capture_len)
4180 log_len = sess->fe->capture_len;
4181 memcpy(txn->cli_cookie, att_beg, log_len);
4182 txn->cli_cookie[log_len] = 0;
4183 }
4184 }
4185
4186 /* Persistence cookies in passive, rewrite or insert mode have the
4187 * following form :
4188 *
4189 * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
4190 *
4191 * For cookies in prefix mode, the form is :
4192 *
4193 * Cookie: NAME=SRV~VALUE
4194 */
4195 if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
4196 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
4197 struct server *srv = s->be->srv;
4198 char *delim;
4199
4200 /* if we're in cookie prefix mode, we'll search the delimitor so that we
4201 * have the server ID between val_beg and delim, and the original cookie between
4202 * delim+1 and val_end. Otherwise, delim==val_end :
4203 *
4204 * hdr_beg
4205 * |
4206 * v
4207 * NAME=SRV; # in all but prefix modes
4208 * NAME=SRV~OPAQUE ; # in prefix mode
4209 * || || | |+-> next
4210 * || || | +--> val_end
4211 * || || +---------> delim
4212 * || |+------------> val_beg
4213 * || +-------------> att_end = equal
4214 * |+-----------------> att_beg
4215 * +------------------> prev
4216 *
4217 */
4218 if (s->be->ck_opts & PR_CK_PFX) {
4219 for (delim = val_beg; delim < val_end; delim++)
4220 if (*delim == COOKIE_DELIM)
4221 break;
4222 }
4223 else {
4224 char *vbar1;
4225 delim = val_end;
4226 /* Now check if the cookie contains a date field, which would
4227 * appear after a vertical bar ('|') just after the server name
4228 * and before the delimiter.
4229 */
4230 vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
4231 if (vbar1) {
4232 /* OK, so left of the bar is the server's cookie and
4233 * right is the last seen date. It is a base64 encoded
4234 * 30-bit value representing the UNIX date since the
4235 * epoch in 4-second quantities.
4236 */
4237 int val;
4238 delim = vbar1++;
4239 if (val_end - vbar1 >= 5) {
4240 val = b64tos30(vbar1);
4241 if (val > 0)
4242 txn->cookie_last_date = val << 2;
4243 }
4244 /* look for a second vertical bar */
4245 vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
4246 if (vbar1 && (val_end - vbar1 > 5)) {
4247 val = b64tos30(vbar1 + 1);
4248 if (val > 0)
4249 txn->cookie_first_date = val << 2;
4250 }
4251 }
4252 }
4253
4254 /* if the cookie has an expiration date and the proxy wants to check
4255 * it, then we do that now. We first check if the cookie is too old,
4256 * then only if it has expired. We detect strict overflow because the
4257 * time resolution here is not great (4 seconds). Cookies with dates
4258 * in the future are ignored if their offset is beyond one day. This
4259 * allows an admin to fix timezone issues without expiring everyone
4260 * and at the same time avoids keeping unwanted side effects for too
4261 * long.
4262 */
4263 if (txn->cookie_first_date && s->be->cookie_maxlife &&
4264 (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
4265 ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
4266 txn->flags &= ~TX_CK_MASK;
4267 txn->flags |= TX_CK_OLD;
4268 delim = val_beg; // let's pretend we have not found the cookie
4269 txn->cookie_first_date = 0;
4270 txn->cookie_last_date = 0;
4271 }
4272 else if (txn->cookie_last_date && s->be->cookie_maxidle &&
4273 (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
4274 ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
4275 txn->flags &= ~TX_CK_MASK;
4276 txn->flags |= TX_CK_EXPIRED;
4277 delim = val_beg; // let's pretend we have not found the cookie
4278 txn->cookie_first_date = 0;
4279 txn->cookie_last_date = 0;
4280 }
4281
4282 /* Here, we'll look for the first running server which supports the cookie.
4283 * This allows to share a same cookie between several servers, for example
4284 * to dedicate backup servers to specific servers only.
4285 * However, to prevent clients from sticking to cookie-less backup server
4286 * when they have incidentely learned an empty cookie, we simply ignore
4287 * empty cookies and mark them as invalid.
4288 * The same behaviour is applied when persistence must be ignored.
4289 */
4290 if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
4291 srv = NULL;
4292
4293 while (srv) {
4294 if (srv->cookie && (srv->cklen == delim - val_beg) &&
4295 !memcmp(val_beg, srv->cookie, delim - val_beg)) {
4296 if ((srv->cur_state != SRV_ST_STOPPED) ||
4297 (s->be->options & PR_O_PERSIST) ||
4298 (s->flags & SF_FORCE_PRST)) {
4299 /* we found the server and we can use it */
4300 txn->flags &= ~TX_CK_MASK;
4301 txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
4302 s->flags |= SF_DIRECT | SF_ASSIGNED;
4303 s->target = &srv->obj_type;
4304 break;
4305 } else {
4306 /* we found a server, but it's down,
4307 * mark it as such and go on in case
4308 * another one is available.
4309 */
4310 txn->flags &= ~TX_CK_MASK;
4311 txn->flags |= TX_CK_DOWN;
4312 }
4313 }
4314 srv = srv->next;
4315 }
4316
4317 if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
4318 /* no server matched this cookie or we deliberately skipped it */
4319 txn->flags &= ~TX_CK_MASK;
4320 if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
4321 txn->flags |= TX_CK_UNUSED;
4322 else
4323 txn->flags |= TX_CK_INVALID;
4324 }
4325
4326 /* depending on the cookie mode, we may have to either :
4327 * - delete the complete cookie if we're in insert+indirect mode, so that
4328 * the server never sees it ;
4329 * - remove the server id from the cookie value, and tag the cookie as an
Joseph Herlante9d5c722018-11-25 11:00:25 -08004330 * application cookie so that it does not get accidentally removed later,
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004331 * if we're in cookie prefix mode
4332 */
4333 if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
4334 int delta; /* negative */
4335
4336 memmove(val_beg, delim + 1, hdr_end - (delim + 1));
4337 delta = val_beg - (delim + 1);
4338 val_end += delta;
4339 next += delta;
4340 hdr_end += delta;
4341 del_from = NULL;
4342 preserve_hdr = 1; /* we want to keep this cookie */
4343 }
4344 else if (del_from == NULL &&
4345 (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
4346 del_from = prev;
4347 }
4348 }
4349 else {
4350 /* This is not our cookie, so we must preserve it. But if we already
4351 * scheduled another cookie for removal, we cannot remove the
4352 * complete header, but we can remove the previous block itself.
4353 */
4354 preserve_hdr = 1;
4355
4356 if (del_from != NULL) {
4357 int delta = htx_del_hdr_value(hdr_beg, hdr_end, &del_from, prev);
4358 if (att_beg >= del_from)
4359 att_beg += delta;
4360 if (att_end >= del_from)
4361 att_end += delta;
4362 val_beg += delta;
4363 val_end += delta;
4364 next += delta;
4365 hdr_end += delta;
4366 prev = del_from;
4367 del_from = NULL;
4368 }
4369 }
4370
4371 /* continue with next cookie on this header line */
4372 att_beg = next;
4373 } /* for each cookie */
4374
4375
4376 /* There are no more cookies on this line.
4377 * We may still have one (or several) marked for deletion at the
4378 * end of the line. We must do this now in two ways :
4379 * - if some cookies must be preserved, we only delete from the
4380 * mark to the end of line ;
4381 * - if nothing needs to be preserved, simply delete the whole header
4382 */
4383 if (del_from) {
4384 hdr_end = (preserve_hdr ? del_from : hdr_beg);
4385 }
4386 if ((hdr_end - hdr_beg) != ctx.value.len) {
Christopher Faulet41dc8432019-06-18 09:49:16 +02004387 if (hdr_beg != hdr_end)
4388 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004389 else
4390 http_remove_header(htx, &ctx);
4391 }
4392 } /* for each "Cookie header */
4393}
4394
4395/*
4396 * Manage server-side cookies. It can impact performance by about 2% so it is
4397 * desirable to call it only when needed. This function is also used when we
4398 * just need to know if there is a cookie (eg: for check-cache).
4399 */
4400static void htx_manage_server_side_cookies(struct stream *s, struct channel *res)
4401{
4402 struct session *sess = s->sess;
4403 struct http_txn *txn = s->txn;
4404 struct htx *htx;
4405 struct http_hdr_ctx ctx;
4406 struct server *srv;
4407 char *hdr_beg, *hdr_end;
4408 char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
Willy Tarreau6f7a02a2019-04-15 21:49:49 +02004409 int is_cookie2 = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004410
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004411 htx = htxbuf(&res->buf);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004412
4413 ctx.blk = NULL;
4414 while (1) {
Olivier Houchardfc7f52e2019-07-22 17:43:46 +02004415 int is_first = 1;
4416
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004417 if (!http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) {
4418 if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1))
4419 break;
4420 is_cookie2 = 1;
4421 }
4422
4423 /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
4424 * <prev> points to the colon.
4425 */
4426 txn->flags |= TX_SCK_PRESENT;
4427
4428 /* Maybe we only wanted to see if there was a Set-Cookie (eg:
4429 * check-cache is enabled) and we are not interested in checking
4430 * them. Warning, the cookie capture is declared in the frontend.
4431 */
4432 if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
4433 break;
4434
4435 /* OK so now we know we have to process this response cookie.
4436 * The format of the Set-Cookie header is slightly different
4437 * from the format of the Cookie header in that it does not
4438 * support the comma as a cookie delimiter (thus the header
4439 * cannot be folded) because the Expires attribute described in
4440 * the original Netscape's spec may contain an unquoted date
4441 * with a comma inside. We have to live with this because
4442 * many browsers don't support Max-Age and some browsers don't
4443 * support quoted strings. However the Set-Cookie2 header is
4444 * clean.
4445 *
4446 * We have to keep multiple pointers in order to support cookie
4447 * removal at the beginning, middle or end of header without
4448 * corrupting the header (in case of set-cookie2). A special
4449 * pointer, <scav> points to the beginning of the set-cookie-av
4450 * fields after the first semi-colon. The <next> pointer points
4451 * either to the end of line (set-cookie) or next unquoted comma
4452 * (set-cookie2). All of these headers are valid :
4453 *
4454 * hdr_beg hdr_end
4455 * | |
4456 * v |
4457 * NAME1 = VALUE 1 ; Secure; Path="/" |
4458 * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v
4459 * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT
4460 * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard
4461 * | | | | | | | |
4462 * | | | | | | | +-> next
4463 * | | | | | | +------------> scav
4464 * | | | | | +--------------> val_end
4465 * | | | | +--------------------> val_beg
4466 * | | | +----------------------> equal
4467 * | | +------------------------> att_end
4468 * | +----------------------------> att_beg
4469 * +------------------------------> prev
4470 * -------------------------------> hdr_beg
4471 */
4472 hdr_beg = ctx.value.ptr;
4473 hdr_end = hdr_beg + ctx.value.len;
4474 for (prev = hdr_beg; prev < hdr_end; prev = next) {
4475
4476 /* Iterate through all cookies on this line */
4477
4478 /* find att_beg */
4479 att_beg = prev;
Olivier Houchardfc7f52e2019-07-22 17:43:46 +02004480 if (!is_first)
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004481 att_beg++;
Olivier Houchardfc7f52e2019-07-22 17:43:46 +02004482 is_first = 0;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004483
4484 while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
4485 att_beg++;
4486
4487 /* find att_end : this is the first character after the last non
4488 * space before the equal. It may be equal to hdr_end.
4489 */
4490 equal = att_end = att_beg;
4491
4492 while (equal < hdr_end) {
4493 if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
4494 break;
4495 if (HTTP_IS_SPHT(*equal++))
4496 continue;
4497 att_end = equal;
4498 }
4499
4500 /* here, <equal> points to '=', a delimitor or the end. <att_end>
4501 * is between <att_beg> and <equal>, both may be identical.
4502 */
4503
4504 /* look for end of cookie if there is an equal sign */
4505 if (equal < hdr_end && *equal == '=') {
4506 /* look for the beginning of the value */
4507 val_beg = equal + 1;
4508 while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
4509 val_beg++;
4510
4511 /* find the end of the value, respecting quotes */
4512 next = http_find_cookie_value_end(val_beg, hdr_end);
4513
4514 /* make val_end point to the first white space or delimitor after the value */
4515 val_end = next;
4516 while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
4517 val_end--;
4518 }
4519 else {
4520 /* <equal> points to next comma, semi-colon or EOL */
4521 val_beg = val_end = next = equal;
4522 }
4523
4524 if (next < hdr_end) {
4525 /* Set-Cookie2 supports multiple cookies, and <next> points to
4526 * a colon or semi-colon before the end. So skip all attr-value
4527 * pairs and look for the next comma. For Set-Cookie, since
4528 * commas are permitted in values, skip to the end.
4529 */
4530 if (is_cookie2)
4531 next = http_find_hdr_value_end(next, hdr_end);
4532 else
4533 next = hdr_end;
4534 }
4535
4536 /* Now everything is as on the diagram above */
4537
4538 /* Ignore cookies with no equal sign */
4539 if (equal == val_end)
4540 continue;
4541
4542 /* If there are spaces around the equal sign, we need to
4543 * strip them otherwise we'll get trouble for cookie captures,
4544 * or even for rewrites. Since this happens extremely rarely,
4545 * it does not hurt performance.
4546 */
4547 if (unlikely(att_end != equal || val_beg > equal + 1)) {
4548 int stripped_before = 0;
4549 int stripped_after = 0;
4550
4551 if (att_end != equal) {
4552 memmove(att_end, equal, hdr_end - equal);
4553 stripped_before = (att_end - equal);
4554 equal += stripped_before;
4555 val_beg += stripped_before;
4556 }
4557
4558 if (val_beg > equal + 1) {
4559 memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg);
4560 stripped_after = (equal + 1) - val_beg;
4561 val_beg += stripped_after;
4562 stripped_before += stripped_after;
4563 }
4564
4565 val_end += stripped_before;
4566 next += stripped_before;
4567 hdr_end += stripped_before;
4568
Christopher Faulet41dc8432019-06-18 09:49:16 +02004569 htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg);
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004570 ctx.value.len = hdr_end - hdr_beg;
Christopher Fauletfcda7c62018-10-24 11:56:22 +02004571 }
4572
4573 /* First, let's see if we want to capture this cookie. We check
4574 * that we don't already have a server side cookie, because we
4575 * can only capture one. Also as an optimisation, we ignore
4576 * cookies shorter than the declared name.
4577 */
4578 if (sess->fe->capture_name != NULL &&
4579 txn->srv_cookie == NULL &&
4580 (val_end - att_beg >= sess->fe->capture_namelen) &&
4581 memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
4582 int log_len = val_end - att_beg;
4583 if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
4584 ha_alert("HTTP logging : out of memory.\n");
4585 }
4586 else {
4587 if (log_len > sess->fe->capture_len)
4588 log_len = sess->fe->capture_len;
4589 memcpy(txn->srv_cookie, att_beg, log_len);
4590 txn->srv_cookie[log_len] = 0;
4591 }
4592 }
4593
4594 srv = objt_server(s->target);
4595 /* now check if we need to process it for persistence */
4596 if (!(s->flags & SF_IGNORE_PRST) &&
4597 (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
4598 (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
4599 /* assume passive cookie by default */
4600 txn->flags &= ~TX_SCK_MASK;
4601 txn->flags |= TX_SCK_FOUND;
4602
4603 /* If the cookie is in insert mode on a known server, we'll delete
4604 * this occurrence because we'll insert another one later.
4605 * We'll delete it too if the "indirect" option is set and we're in
4606 * a direct access.
4607 */
4608 if (s->be->ck_opts & PR_CK_PSV) {
4609 /* The "preserve" flag was set, we don't want to touch the
4610 * server's cookie.
4611 */
4612 }
4613 else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
4614 ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
4615 /* this cookie must be deleted */
4616 if (prev == hdr_beg && next == hdr_end) {
4617 /* whole header */
4618 http_remove_header(htx, &ctx);
4619 /* note: while both invalid now, <next> and <hdr_end>
4620 * are still equal, so the for() will stop as expected.
4621 */
4622 } else {
4623 /* just remove the value */
4624 int delta = htx_del_hdr_value(hdr_beg, hdr_end, &prev, next);
4625 next = prev;
4626 hdr_end += delta;
4627 }
4628 txn->flags &= ~TX_SCK_MASK;
4629 txn->flags |= TX_SCK_DELETED;
4630 /* and go on with next cookie */
4631 }
4632 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
4633 /* replace bytes val_beg->val_end with the cookie name associated
4634 * with this server since we know it.
4635 */
4636 int sliding, delta;
4637
4638 ctx.value = ist2(val_beg, val_end - val_beg);
4639 ctx.lws_before = ctx.lws_after = 0;
4640 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen));
4641 delta = srv->cklen - (val_end - val_beg);
4642 sliding = (ctx.value.ptr - val_beg);
4643 hdr_beg += sliding;
4644 val_beg += sliding;
4645 next += sliding + delta;
4646 hdr_end += sliding + delta;
4647
4648 txn->flags &= ~TX_SCK_MASK;
4649 txn->flags |= TX_SCK_REPLACED;
4650 }
4651 else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
4652 /* insert the cookie name associated with this server
4653 * before existing cookie, and insert a delimiter between them..
4654 */
4655 int sliding, delta;
4656 ctx.value = ist2(val_beg, 0);
4657 ctx.lws_before = ctx.lws_after = 0;
4658 http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1));
4659 delta = srv->cklen + 1;
4660 sliding = (ctx.value.ptr - val_beg);
4661 hdr_beg += sliding;
4662 val_beg += sliding;
4663 next += sliding + delta;
4664 hdr_end += sliding + delta;
4665
4666 val_beg[srv->cklen] = COOKIE_DELIM;
4667 txn->flags &= ~TX_SCK_MASK;
4668 txn->flags |= TX_SCK_REPLACED;
4669 }
4670 }
4671 /* that's done for this cookie, check the next one on the same
4672 * line when next != hdr_end (only if is_cookie2).
4673 */
4674 }
4675 }
4676}
4677
Christopher Faulet25a02f62018-10-24 12:00:25 +02004678/*
4679 * Parses the Cache-Control and Pragma request header fields to determine if
4680 * the request may be served from the cache and/or if it is cacheable. Updates
4681 * s->txn->flags.
4682 */
4683void htx_check_request_for_cacheability(struct stream *s, struct channel *req)
4684{
4685 struct http_txn *txn = s->txn;
4686 struct htx *htx;
4687 int32_t pos;
4688 int pragma_found, cc_found, i;
4689
4690 if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
4691 return; /* nothing more to do here */
4692
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004693 htx = htxbuf(&req->buf);
Christopher Faulet25a02f62018-10-24 12:00:25 +02004694 pragma_found = cc_found = 0;
Christopher Fauleta3f15502019-05-13 15:27:23 +02004695 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004696 struct htx_blk *blk = htx_get_blk(htx, pos);
4697 enum htx_blk_type type = htx_get_blk_type(blk);
4698 struct ist n, v;
4699
4700 if (type == HTX_BLK_EOH)
4701 break;
4702 if (type != HTX_BLK_HDR)
4703 continue;
4704
4705 n = htx_get_blk_name(htx, blk);
4706 v = htx_get_blk_value(htx, blk);
4707
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004708 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004709 if (v.len >= 8 && strncasecmp(v.ptr, "no-cache", 8) == 0) {
4710 pragma_found = 1;
4711 continue;
4712 }
4713 }
4714
4715 /* Don't use the cache and don't try to store if we found the
4716 * Authorization header */
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004717 if (isteq(n, ist("authorization"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004718 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4719 txn->flags |= TX_CACHE_IGNORE;
4720 continue;
4721 }
4722
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004723 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02004724 continue;
4725
4726 /* OK, right now we know we have a cache-control header */
4727 cc_found = 1;
4728 if (!v.len) /* no info */
4729 continue;
4730
4731 i = 0;
4732 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
4733 !isspace((unsigned char)*(v.ptr+i)))
4734 i++;
4735
4736 /* we have a complete value between v.ptr and (v.ptr+i). We don't check the
4737 * values after max-age, max-stale nor min-fresh, we simply don't
4738 * use the cache when they're specified.
4739 */
4740 if (((i == 7) && strncasecmp(v.ptr, "max-age", 7) == 0) ||
4741 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
4742 ((i == 9) && strncasecmp(v.ptr, "max-stale", 9) == 0) ||
4743 ((i == 9) && strncasecmp(v.ptr, "min-fresh", 9) == 0)) {
4744 txn->flags |= TX_CACHE_IGNORE;
4745 continue;
4746 }
4747
4748 if ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0) {
4749 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4750 continue;
4751 }
4752 }
4753
4754 /* RFC7234#5.4:
4755 * When the Cache-Control header field is also present and
4756 * understood in a request, Pragma is ignored.
4757 * When the Cache-Control header field is not present in a
4758 * request, caches MUST consider the no-cache request
4759 * pragma-directive as having the same effect as if
4760 * "Cache-Control: no-cache" were present.
4761 */
4762 if (!cc_found && pragma_found)
4763 txn->flags |= TX_CACHE_IGNORE;
4764}
4765
4766/*
4767 * Check if response is cacheable or not. Updates s->txn->flags.
4768 */
4769void htx_check_response_for_cacheability(struct stream *s, struct channel *res)
4770{
4771 struct http_txn *txn = s->txn;
4772 struct htx *htx;
4773 int32_t pos;
4774 int i;
4775
4776 if (txn->status < 200) {
4777 /* do not try to cache interim responses! */
4778 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4779 return;
4780 }
4781
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004782 htx = htxbuf(&res->buf);
Christopher Fauleta3f15502019-05-13 15:27:23 +02004783 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004784 struct htx_blk *blk = htx_get_blk(htx, pos);
4785 enum htx_blk_type type = htx_get_blk_type(blk);
4786 struct ist n, v;
4787
4788 if (type == HTX_BLK_EOH)
4789 break;
4790 if (type != HTX_BLK_HDR)
4791 continue;
4792
4793 n = htx_get_blk_name(htx, blk);
4794 v = htx_get_blk_value(htx, blk);
4795
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004796 if (isteq(n, ist("pragma"))) {
Christopher Faulet25a02f62018-10-24 12:00:25 +02004797 if ((v.len >= 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) {
4798 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4799 return;
4800 }
4801 }
4802
Willy Tarreau2e754bf2018-12-07 11:38:03 +01004803 if (!isteq(n, ist("cache-control")))
Christopher Faulet25a02f62018-10-24 12:00:25 +02004804 continue;
4805
4806 /* OK, right now we know we have a cache-control header */
4807 if (!v.len) /* no info */
4808 continue;
4809
4810 i = 0;
4811 while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' &&
4812 !isspace((unsigned char)*(v.ptr+i)))
4813 i++;
4814
4815 /* we have a complete value between v.ptr and (v.ptr+i) */
4816 if (i < v.len && *(v.ptr + i) == '=') {
4817 if (((v.len - i) > 1 && (i == 7) && strncasecmp(v.ptr, "max-age=0", 9) == 0) ||
4818 ((v.len - i) > 1 && (i == 8) && strncasecmp(v.ptr, "s-maxage=0", 10) == 0)) {
4819 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4820 continue;
4821 }
4822
4823 /* we have something of the form no-cache="set-cookie" */
4824 if ((v.len >= 21) &&
4825 strncasecmp(v.ptr, "no-cache=\"set-cookie", 20) == 0
4826 && (*(v.ptr + 20) == '"' || *(v.ptr + 20 ) == ','))
4827 txn->flags &= ~TX_CACHE_COOK;
4828 continue;
4829 }
4830
4831 /* OK, so we know that either p2 points to the end of string or to a comma */
4832 if (((i == 7) && strncasecmp(v.ptr, "private", 7) == 0) ||
4833 ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) ||
4834 ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0)) {
4835 txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
4836 return;
4837 }
4838
4839 if ((i == 6) && strncasecmp(v.ptr, "public", 6) == 0) {
4840 txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
4841 continue;
4842 }
4843 }
4844}
4845
Christopher Faulet64159df2018-10-24 21:15:35 +02004846/* send a server's name with an outgoing request over an established connection.
4847 * Note: this function is designed to be called once the request has been
4848 * scheduled for being forwarded. This is the reason why the number of forwarded
4849 * bytes have to be adjusted.
4850 */
4851int htx_send_name_header(struct stream *s, struct proxy *be, const char *srv_name)
4852{
4853 struct htx *htx;
4854 struct http_hdr_ctx ctx;
4855 struct ist hdr;
4856 uint32_t data;
4857
4858 hdr = ist2(be->server_id_hdr_name, be->server_id_hdr_len);
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004859 htx = htxbuf(&s->req.buf);
Christopher Faulet64159df2018-10-24 21:15:35 +02004860 data = htx->data;
4861
4862 ctx.blk = NULL;
4863 while (http_find_header(htx, hdr, &ctx, 1))
4864 http_remove_header(htx, &ctx);
4865 http_add_header(htx, hdr, ist2(srv_name, strlen(srv_name)));
4866
4867 if (co_data(&s->req)) {
4868 if (data >= htx->data)
4869 c_rew(&s->req, data - htx->data);
4870 else
4871 c_adv(&s->req, htx->data - data);
4872 }
4873 return 0;
4874}
4875
Christopher Faulet377c5a52018-10-24 21:21:30 +02004876/*
4877 * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
4878 * for the current backend.
4879 *
4880 * It is assumed that the request is either a HEAD, GET, or POST and that the
4881 * uri_auth field is valid.
4882 *
4883 * Returns 1 if stats should be provided, otherwise 0.
4884 */
4885static int htx_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend)
4886{
4887 struct uri_auth *uri_auth = backend->uri_auth;
4888 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004889 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004890 struct ist uri;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004891
4892 if (!uri_auth)
4893 return 0;
4894
4895 if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
4896 return 0;
4897
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004898 htx = htxbuf(&s->req.buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004899 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004900 uri = htx_sl_req_uri(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004901
4902 /* check URI size */
4903 if (uri_auth->uri_len > uri.len)
4904 return 0;
4905
4906 if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
4907 return 0;
4908
4909 return 1;
4910}
4911
4912/* This function prepares an applet to handle the stats. It can deal with the
4913 * "100-continue" expectation, check that admin rules are met for POST requests,
4914 * and program a response message if something was unexpected. It cannot fail
4915 * and always relies on the stats applet to complete the job. It does not touch
4916 * analysers nor counters, which are left to the caller. It does not touch
4917 * s->target which is supposed to already point to the stats applet. The caller
4918 * is expected to have already assigned an appctx to the stream.
4919 */
4920static int htx_handle_stats(struct stream *s, struct channel *req)
4921{
4922 struct stats_admin_rule *stats_admin_rule;
4923 struct stream_interface *si = &s->si[1];
4924 struct session *sess = s->sess;
4925 struct http_txn *txn = s->txn;
4926 struct http_msg *msg = &txn->req;
4927 struct uri_auth *uri_auth = s->be->uri_auth;
4928 const char *h, *lookup, *end;
4929 struct appctx *appctx;
4930 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004931 struct htx_sl *sl;
Christopher Faulet377c5a52018-10-24 21:21:30 +02004932
4933 appctx = si_appctx(si);
4934 memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
4935 appctx->st1 = appctx->st2 = 0;
4936 appctx->ctx.stats.st_code = STAT_STATUS_INIT;
4937 appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
4938 if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD))
4939 appctx->ctx.stats.flags |= STAT_CHUNKED;
4940
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004941 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02004942 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01004943 lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len;
4944 end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
Christopher Faulet377c5a52018-10-24 21:21:30 +02004945
4946 for (h = lookup; h <= end - 3; h++) {
4947 if (memcmp(h, ";up", 3) == 0) {
4948 appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
4949 break;
4950 }
4951 }
4952
4953 if (uri_auth->refresh) {
4954 for (h = lookup; h <= end - 10; h++) {
4955 if (memcmp(h, ";norefresh", 10) == 0) {
4956 appctx->ctx.stats.flags |= STAT_NO_REFRESH;
4957 break;
4958 }
4959 }
4960 }
4961
4962 for (h = lookup; h <= end - 4; h++) {
4963 if (memcmp(h, ";csv", 4) == 0) {
4964 appctx->ctx.stats.flags &= ~STAT_FMT_HTML;
4965 break;
4966 }
4967 }
4968
4969 for (h = lookup; h <= end - 6; h++) {
4970 if (memcmp(h, ";typed", 6) == 0) {
4971 appctx->ctx.stats.flags &= ~STAT_FMT_HTML;
4972 appctx->ctx.stats.flags |= STAT_FMT_TYPED;
4973 break;
4974 }
4975 }
4976
4977 for (h = lookup; h <= end - 8; h++) {
4978 if (memcmp(h, ";st=", 4) == 0) {
4979 int i;
4980 h += 4;
4981 appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
4982 for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
4983 if (strncmp(stat_status_codes[i], h, 4) == 0) {
4984 appctx->ctx.stats.st_code = i;
4985 break;
4986 }
4987 }
4988 break;
4989 }
4990 }
4991
4992 appctx->ctx.stats.scope_str = 0;
4993 appctx->ctx.stats.scope_len = 0;
4994 for (h = lookup; h <= end - 8; h++) {
4995 if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
4996 int itx = 0;
4997 const char *h2;
4998 char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
4999 const char *err;
5000
5001 h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
5002 h2 = h;
Christopher Fauleted7a0662019-01-14 11:07:34 +01005003 appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl);
5004 while (h < end) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02005005 if (*h == ';' || *h == '&' || *h == ' ')
5006 break;
5007 itx++;
5008 h++;
5009 }
5010
5011 if (itx > STAT_SCOPE_TXT_MAXLEN)
5012 itx = STAT_SCOPE_TXT_MAXLEN;
5013 appctx->ctx.stats.scope_len = itx;
5014
5015 /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
5016 memcpy(scope_txt, h2, itx);
5017 scope_txt[itx] = '\0';
5018 err = invalid_char(scope_txt);
5019 if (err) {
5020 /* bad char in search text => clear scope */
5021 appctx->ctx.stats.scope_str = 0;
5022 appctx->ctx.stats.scope_len = 0;
5023 }
5024 break;
5025 }
5026 }
5027
5028 /* now check whether we have some admin rules for this request */
5029 list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
5030 int ret = 1;
5031
5032 if (stats_admin_rule->cond) {
5033 ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
5034 ret = acl_pass(ret);
5035 if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
5036 ret = !ret;
5037 }
5038
5039 if (ret) {
5040 /* no rule, or the rule matches */
5041 appctx->ctx.stats.flags |= STAT_ADMIN;
5042 break;
5043 }
5044 }
5045
Christopher Faulet5d45e382019-02-27 15:15:23 +01005046 if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
5047 appctx->st0 = STAT_HTTP_HEAD;
5048 else if (txn->meth == HTTP_METH_POST) {
Christopher Faulet69af2522019-08-15 22:26:48 +02005049 if (appctx->ctx.stats.flags & STAT_ADMIN) {
Christopher Faulet377c5a52018-10-24 21:21:30 +02005050 appctx->st0 = STAT_HTTP_POST;
Christopher Faulet69af2522019-08-15 22:26:48 +02005051 if (msg->msg_state < HTTP_MSG_DATA)
5052 req->analysers |= AN_REQ_HTTP_BODY;
5053 }
Christopher Faulet377c5a52018-10-24 21:21:30 +02005054 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01005055 /* POST without admin level */
Christopher Faulet377c5a52018-10-24 21:21:30 +02005056 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
5057 appctx->ctx.stats.st_code = STAT_STATUS_DENY;
5058 appctx->st0 = STAT_HTTP_LAST;
5059 }
5060 }
5061 else {
Christopher Faulet5d45e382019-02-27 15:15:23 +01005062 /* Unsupported method */
5063 appctx->ctx.stats.flags &= ~STAT_CHUNKED;
5064 appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
5065 appctx->st0 = STAT_HTTP_LAST;
Christopher Faulet377c5a52018-10-24 21:21:30 +02005066 }
5067
5068 s->task->nice = -32; /* small boost for HTTP statistics */
5069 return 1;
5070}
5071
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005072void htx_perform_server_redirect(struct stream *s, struct stream_interface *si)
5073{
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005074 struct channel *req = &s->req;
5075 struct channel *res = &s->res;
5076 struct server *srv;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005077 struct htx *htx;
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005078 struct htx_sl *sl;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005079 struct ist path, location;
5080 unsigned int flags;
5081 size_t data;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005082
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005083 /*
5084 * Create the location
5085 */
5086 chunk_reset(&trash);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005087
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005088 /* 1: add the server's prefix */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005089 /* special prefix "/" means don't change URL */
5090 srv = __objt_server(s->target);
5091 if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
5092 if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len))
5093 return;
5094 }
5095
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005096 /* 2: add the request Path */
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005097 htx = htxbuf(&req->buf);
Christopher Faulet297fbb42019-05-13 14:41:27 +02005098 sl = http_get_stline(htx);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005099 path = http_get_path(htx_sl_req_uri(sl));
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005100 if (!path.ptr)
5101 return;
5102
5103 if (!chunk_memcat(&trash, path.ptr, path.len))
5104 return;
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005105 location = ist2(trash.area, trash.data);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005106
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005107 /*
5108 * Create the 302 respone
5109 */
5110 htx = htx_from_buf(&res->buf);
5111 flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
5112 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
5113 ist("HTTP/1.1"), ist("302"), ist("Found"));
5114 if (!sl)
5115 goto fail;
5116 sl->info.res.status = 302;
5117 s->txn->status = 302;
5118
5119 if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
5120 !htx_add_header(htx, ist("Connection"), ist("close")) ||
5121 !htx_add_header(htx, ist("Content-length"), ist("0")) ||
5122 !htx_add_header(htx, ist("Location"), location))
5123 goto fail;
5124
5125 if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM))
5126 goto fail;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005127
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005128 /*
5129 * Send the message
5130 */
5131 data = htx->data - co_data(res);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005132 c_adv(res, data);
5133 res->total += data;
5134
5135 /* return without error. */
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005136 si_shutr(si);
5137 si_shutw(si);
5138 si->err_type = SI_ET_NONE;
5139 si->state = SI_ST_CLO;
5140
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005141 channel_auto_read(req);
5142 channel_abort(req);
5143 channel_auto_close(req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005144 channel_htx_erase(req, htxbuf(&req->buf));
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005145 channel_auto_read(res);
5146 channel_auto_close(res);
5147
5148 if (!(s->flags & SF_ERR_MASK))
5149 s->flags |= SF_ERR_LOCAL;
5150 if (!(s->flags & SF_FINST_MASK))
5151 s->flags |= SF_FINST_C;
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005152
5153 /* FIXME: we should increase a counter of redirects per server and per backend. */
5154 srv_inc_sess_ctr(srv);
5155 srv_set_sess_last(srv);
Christopher Faulet0eaed6b2018-11-28 17:46:40 +01005156 return;
5157
5158 fail:
5159 /* If an error occurred, remove the incomplete HTTP response from the
5160 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005161 channel_htx_truncate(res, htx);
Christopher Fauletfefc73d2018-10-24 21:18:04 +02005162}
5163
Christopher Fauletf2824e62018-10-01 12:12:37 +02005164/* This function terminates the request because it was completly analyzed or
5165 * because an error was triggered during the body forwarding.
5166 */
5167static void htx_end_request(struct stream *s)
5168{
5169 struct channel *chn = &s->req;
5170 struct http_txn *txn = s->txn;
5171
5172 DPRINTF(stderr,"[%u] %s: stream=%p states=%s,%s req->analysers=0x%08x res->analysers=0x%08x\n",
5173 now_ms, __FUNCTION__, s,
5174 h1_msg_state_str(txn->req.msg_state), h1_msg_state_str(txn->rsp.msg_state),
5175 s->req.analysers, s->res.analysers);
5176
Christopher Fauletb42a8b62018-11-19 21:59:00 +01005177 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
5178 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02005179 channel_abort(chn);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005180 channel_htx_truncate(chn, htxbuf(&chn->buf));
Christopher Fauletf2824e62018-10-01 12:12:37 +02005181 goto end;
5182 }
5183
5184 if (unlikely(txn->req.msg_state < HTTP_MSG_DONE))
5185 return;
5186
5187 if (txn->req.msg_state == HTTP_MSG_DONE) {
Christopher Fauletf2824e62018-10-01 12:12:37 +02005188 /* No need to read anymore, the request was completely parsed.
5189 * We can shut the read side unless we want to abort_on_close,
5190 * or we have a POST request. The issue with POST requests is
5191 * that some browsers still send a CRLF after the request, and
5192 * this CRLF must be read so that it does not remain in the kernel
5193 * buffers, otherwise a close could cause an RST on some systems
5194 * (eg: Linux).
5195 */
Christopher Faulet769d0e92019-03-22 14:23:18 +01005196 if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST)
Christopher Fauletf2824e62018-10-01 12:12:37 +02005197 channel_dont_read(chn);
5198
5199 /* if the server closes the connection, we want to immediately react
5200 * and close the socket to save packets and syscalls.
5201 */
5202 s->si[1].flags |= SI_FL_NOHALF;
5203
5204 /* In any case we've finished parsing the request so we must
5205 * disable Nagle when sending data because 1) we're not going
5206 * to shut this side, and 2) the server is waiting for us to
5207 * send pending data.
5208 */
5209 chn->flags |= CF_NEVER_WAIT;
5210
Christopher Fauletd01ce402019-01-02 17:44:13 +01005211 if (txn->rsp.msg_state < HTTP_MSG_DONE) {
5212 /* The server has not finished to respond, so we
5213 * don't want to move in order not to upset it.
5214 */
5215 return;
5216 }
5217
Christopher Fauletf2824e62018-10-01 12:12:37 +02005218 /* When we get here, it means that both the request and the
5219 * response have finished receiving. Depending on the connection
5220 * mode, we'll have to wait for the last bytes to leave in either
5221 * direction, and sometimes for a close to be effective.
5222 */
5223 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN) {
5224 /* Tunnel mode will not have any analyser so it needs to
5225 * poll for reads.
5226 */
5227 channel_auto_read(chn);
Christopher Faulet9768c262018-10-22 09:34:31 +02005228 if (b_data(&chn->buf))
5229 return;
Christopher Fauletf2824e62018-10-01 12:12:37 +02005230 txn->req.msg_state = HTTP_MSG_TUNNEL;
5231 }
5232 else {
5233 /* we're not expecting any new data to come for this
5234 * transaction, so we can close it.
Christopher Faulet9768c262018-10-22 09:34:31 +02005235 *
5236 * However, there is an exception if the response
5237 * length is undefined. In this case, we need to wait
5238 * the close from the server. The response will be
5239 * switched in TUNNEL mode until the end.
Christopher Fauletf2824e62018-10-01 12:12:37 +02005240 */
5241 if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
5242 txn->rsp.msg_state != HTTP_MSG_CLOSED)
Christopher Faulet9768c262018-10-22 09:34:31 +02005243 goto check_channel_flags;
Christopher Fauletf2824e62018-10-01 12:12:37 +02005244
5245 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
5246 channel_shutr_now(chn);
5247 channel_shutw_now(chn);
5248 }
5249 }
Christopher Fauletf2824e62018-10-01 12:12:37 +02005250 goto check_channel_flags;
5251 }
5252
5253 if (txn->req.msg_state == HTTP_MSG_CLOSING) {
5254 http_msg_closing:
5255 /* nothing else to forward, just waiting for the output buffer
5256 * to be empty and for the shutw_now to take effect.
5257 */
5258 if (channel_is_empty(chn)) {
5259 txn->req.msg_state = HTTP_MSG_CLOSED;
5260 goto http_msg_closed;
5261 }
5262 else if (chn->flags & CF_SHUTW) {
5263 txn->req.err_state = txn->req.msg_state;
5264 txn->req.msg_state = HTTP_MSG_ERROR;
5265 goto end;
5266 }
5267 return;
5268 }
5269
5270 if (txn->req.msg_state == HTTP_MSG_CLOSED) {
5271 http_msg_closed:
Christopher Fauletf2824e62018-10-01 12:12:37 +02005272 /* if we don't know whether the server will close, we need to hard close */
5273 if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
5274 s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
Christopher Fauletf2824e62018-10-01 12:12:37 +02005275 /* see above in MSG_DONE why we only do this in these states */
Christopher Faulet769d0e92019-03-22 14:23:18 +01005276 if (!(s->be->options & PR_O_ABRT_CLOSE))
Christopher Fauletf2824e62018-10-01 12:12:37 +02005277 channel_dont_read(chn);
5278 goto end;
5279 }
5280
5281 check_channel_flags:
5282 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
5283 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
5284 /* if we've just closed an output, let's switch */
5285 txn->req.msg_state = HTTP_MSG_CLOSING;
5286 goto http_msg_closing;
5287 }
5288
5289 end:
5290 chn->analysers &= AN_REQ_FLT_END;
5291 if (txn->req.msg_state == HTTP_MSG_TUNNEL && HAS_REQ_DATA_FILTERS(s))
5292 chn->analysers |= AN_REQ_FLT_XFER_DATA;
5293 channel_auto_close(chn);
5294 channel_auto_read(chn);
5295}
5296
5297
5298/* This function terminates the response because it was completly analyzed or
5299 * because an error was triggered during the body forwarding.
5300 */
5301static void htx_end_response(struct stream *s)
5302{
5303 struct channel *chn = &s->res;
5304 struct http_txn *txn = s->txn;
5305
5306 DPRINTF(stderr,"[%u] %s: stream=%p states=%s,%s req->analysers=0x%08x res->analysers=0x%08x\n",
5307 now_ms, __FUNCTION__, s,
5308 h1_msg_state_str(txn->req.msg_state), h1_msg_state_str(txn->rsp.msg_state),
5309 s->req.analysers, s->res.analysers);
5310
Christopher Fauletb42a8b62018-11-19 21:59:00 +01005311 if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR ||
5312 txn->rsp.msg_state == HTTP_MSG_ERROR)) {
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005313 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02005314 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005315 goto end;
5316 }
5317
5318 if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE))
5319 return;
5320
5321 if (txn->rsp.msg_state == HTTP_MSG_DONE) {
5322 /* In theory, we don't need to read anymore, but we must
5323 * still monitor the server connection for a possible close
5324 * while the request is being uploaded, so we don't disable
5325 * reading.
5326 */
5327 /* channel_dont_read(chn); */
5328
5329 if (txn->req.msg_state < HTTP_MSG_DONE) {
5330 /* The client seems to still be sending data, probably
5331 * because we got an error response during an upload.
5332 * We have the choice of either breaking the connection
5333 * or letting it pass through. Let's do the later.
5334 */
5335 return;
5336 }
5337
5338 /* When we get here, it means that both the request and the
5339 * response have finished receiving. Depending on the connection
5340 * mode, we'll have to wait for the last bytes to leave in either
5341 * direction, and sometimes for a close to be effective.
5342 */
5343 if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN) {
5344 channel_auto_read(chn);
5345 chn->flags |= CF_NEVER_WAIT;
Christopher Faulet9768c262018-10-22 09:34:31 +02005346 if (b_data(&chn->buf))
5347 return;
Christopher Fauletf2824e62018-10-01 12:12:37 +02005348 txn->rsp.msg_state = HTTP_MSG_TUNNEL;
5349 }
5350 else {
5351 /* we're not expecting any new data to come for this
5352 * transaction, so we can close it.
5353 */
5354 if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
5355 channel_shutr_now(chn);
5356 channel_shutw_now(chn);
5357 }
5358 }
5359 goto check_channel_flags;
5360 }
5361
5362 if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
5363 http_msg_closing:
5364 /* nothing else to forward, just waiting for the output buffer
5365 * to be empty and for the shutw_now to take effect.
5366 */
5367 if (channel_is_empty(chn)) {
5368 txn->rsp.msg_state = HTTP_MSG_CLOSED;
5369 goto http_msg_closed;
5370 }
5371 else if (chn->flags & CF_SHUTW) {
5372 txn->rsp.err_state = txn->rsp.msg_state;
5373 txn->rsp.msg_state = HTTP_MSG_ERROR;
Olivier Houcharda798bf52019-03-08 18:52:00 +01005374 _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005375 if (objt_server(s->target))
Olivier Houcharda798bf52019-03-08 18:52:00 +01005376 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005377 goto end;
5378 }
5379 return;
5380 }
5381
5382 if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
5383 http_msg_closed:
5384 /* drop any pending data */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005385 channel_htx_truncate(&s->req, htxbuf(&s->req.buf));
Christopher Faulet9768c262018-10-22 09:34:31 +02005386 channel_abort(&s->req);
Christopher Fauletf2824e62018-10-01 12:12:37 +02005387 goto end;
5388 }
5389
5390 check_channel_flags:
5391 /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
5392 if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
5393 /* if we've just closed an output, let's switch */
5394 txn->rsp.msg_state = HTTP_MSG_CLOSING;
5395 goto http_msg_closing;
5396 }
5397
5398 end:
5399 chn->analysers &= AN_RES_FLT_END;
5400 if (txn->rsp.msg_state == HTTP_MSG_TUNNEL && HAS_RSP_DATA_FILTERS(s))
5401 chn->analysers |= AN_RES_FLT_XFER_DATA;
5402 channel_auto_close(chn);
5403 channel_auto_read(chn);
5404}
5405
Christopher Faulet0f226952018-10-22 09:29:56 +02005406void htx_server_error(struct stream *s, struct stream_interface *si, int err,
5407 int finst, const struct buffer *msg)
5408{
5409 channel_auto_read(si_oc(si));
5410 channel_abort(si_oc(si));
5411 channel_auto_close(si_oc(si));
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005412 channel_htx_erase(si_oc(si), htxbuf(&(si_oc(si))->buf));
Christopher Faulet0f226952018-10-22 09:29:56 +02005413 channel_auto_close(si_ic(si));
5414 channel_auto_read(si_ic(si));
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005415
5416 /* <msg> is an HTX structure. So we copy it in the response's
5417 * channel */
Christopher Faulet2f8ef7c2019-07-22 16:41:43 +02005418 if (msg && !b_is_null(msg)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02005419 struct channel *chn = si_ic(si);
5420 struct htx *htx;
5421
Christopher Fauletaed82cf2018-11-30 22:22:32 +01005422 FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg));
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005423 chn->buf.data = msg->data;
5424 memcpy(chn->buf.area, msg->area, msg->data);
5425 htx = htx_from_buf(&chn->buf);
Christopher Faulet0f226952018-10-22 09:29:56 +02005426 c_adv(chn, htx->data);
5427 chn->total += htx->data;
5428 }
5429 if (!(s->flags & SF_ERR_MASK))
5430 s->flags |= err;
5431 if (!(s->flags & SF_FINST_MASK))
5432 s->flags |= finst;
5433}
5434
5435void htx_reply_and_close(struct stream *s, short status, struct buffer *msg)
5436{
5437 channel_auto_read(&s->req);
5438 channel_abort(&s->req);
5439 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005440 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
5441 channel_htx_truncate(&s->res, htxbuf(&s->res.buf));
Christopher Faulet0f226952018-10-22 09:29:56 +02005442
5443 s->txn->flags &= ~TX_WAIT_NEXT_RQ;
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005444
5445 /* <msg> is an HTX structure. So we copy it in the response's
5446 * channel */
5447 /* FIXME: It is a problem for now if there is some outgoing data */
Christopher Faulet2f8ef7c2019-07-22 16:41:43 +02005448 if (msg && !b_is_null(msg)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02005449 struct channel *chn = &s->res;
5450 struct htx *htx;
5451
Christopher Fauletaed82cf2018-11-30 22:22:32 +01005452 FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg));
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005453 chn->buf.data = msg->data;
5454 memcpy(chn->buf.area, msg->area, msg->data);
5455 htx = htx_from_buf(&chn->buf);
Christopher Faulet0f226952018-10-22 09:29:56 +02005456 c_adv(chn, htx->data);
5457 chn->total += htx->data;
5458 }
5459
5460 s->res.wex = tick_add_ifset(now_ms, s->res.wto);
5461 channel_auto_read(&s->res);
5462 channel_auto_close(&s->res);
5463 channel_shutr_now(&s->res);
5464}
5465
Christopher Fauleta7b677c2018-11-29 16:48:49 +01005466struct buffer *htx_error_message(struct stream *s)
5467{
5468 const int msgnum = http_get_status_idx(s->txn->status);
5469
5470 if (s->be->errmsg[msgnum].area)
5471 return &s->be->errmsg[msgnum];
5472 else if (strm_fe(s)->errmsg[msgnum].area)
5473 return &strm_fe(s)->errmsg[msgnum];
5474 else
5475 return &htx_err_chunks[msgnum];
5476}
5477
5478
Christopher Faulet4a28a532019-03-01 11:19:40 +01005479/* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0
5480 * on success and -1 on error.
5481 */
5482static int htx_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg)
5483{
5484 /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
5485 * then we must send an HTTP/1.1 100 Continue intermediate response.
5486 */
5487 if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
5488 (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
5489 struct ist hdr = { .ptr = "Expect", .len = 6 };
5490 struct http_hdr_ctx ctx;
5491
5492 ctx.blk = NULL;
5493 /* Expect is allowed in 1.1, look for it */
5494 if (http_find_header(htx, hdr, &ctx, 0) &&
5495 unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) {
5496 if (htx_reply_100_continue(s) == -1)
5497 return -1;
5498 http_remove_header(htx, &ctx);
5499 }
5500 }
5501 return 0;
5502}
5503
Christopher Faulet23a3c792018-11-28 10:01:23 +01005504/* Send a 100-Continue response to the client. It returns 0 on success and -1
5505 * on error. The response channel is updated accordingly.
5506 */
5507static int htx_reply_100_continue(struct stream *s)
5508{
5509 struct channel *res = &s->res;
5510 struct htx *htx = htx_from_buf(&res->buf);
5511 struct htx_sl *sl;
5512 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|
5513 HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS);
5514 size_t data;
5515
5516 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
5517 ist("HTTP/1.1"), ist("100"), ist("Continue"));
5518 if (!sl)
5519 goto fail;
5520 sl->info.res.status = 100;
5521
Christopher Faulet9869f932019-06-26 14:23:54 +02005522 if (!htx_add_endof(htx, HTX_BLK_EOH))
Christopher Faulet23a3c792018-11-28 10:01:23 +01005523 goto fail;
5524
5525 data = htx->data - co_data(res);
Christopher Faulet23a3c792018-11-28 10:01:23 +01005526 c_adv(res, data);
5527 res->total += data;
5528 return 0;
5529
5530 fail:
5531 /* If an error occurred, remove the incomplete HTTP response from the
5532 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005533 channel_htx_truncate(res, htx);
Christopher Faulet23a3c792018-11-28 10:01:23 +01005534 return -1;
5535}
5536
Christopher Faulet12c51e22018-11-28 15:59:42 +01005537
5538/* Send a 401-Unauthorized or 407-Unauthorized response to the client, depending
5539 * ont whether we use a proxy or not. It returns 0 on success and -1 on
5540 * error. The response channel is updated accordingly.
5541 */
5542static int htx_reply_40x_unauthorized(struct stream *s, const char *auth_realm)
5543{
5544 struct channel *res = &s->res;
5545 struct htx *htx = htx_from_buf(&res->buf);
5546 struct htx_sl *sl;
5547 struct ist code, body;
5548 int status;
5549 unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11);
5550 size_t data;
5551
5552 if (!(s->txn->flags & TX_USE_PX_CONN)) {
5553 status = 401;
5554 code = ist("401");
5555 body = ist("<html><body><h1>401 Unauthorized</h1>\n"
5556 "You need a valid user and password to access this content.\n"
5557 "</body></html>\n");
5558 }
5559 else {
5560 status = 407;
5561 code = ist("407");
5562 body = ist("<html><body><h1>407 Unauthorized</h1>\n"
5563 "You need a valid user and password to access this content.\n"
5564 "</body></html>\n");
5565 }
5566
5567 sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags,
5568 ist("HTTP/1.1"), code, ist("Unauthorized"));
5569 if (!sl)
5570 goto fail;
5571 sl->info.res.status = status;
5572 s->txn->status = status;
5573
5574 if (chunk_printf(&trash, "Basic realm=\"%s\"", auth_realm) == -1)
5575 goto fail;
5576
Willy Tarreaub5ba2b02019-06-11 16:08:25 +02005577 if (!htx_add_header(htx, ist("Content-length"), ist("112")) ||
5578 !htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
Christopher Faulet12c51e22018-11-28 15:59:42 +01005579 !htx_add_header(htx, ist("Connection"), ist("close")) ||
Jérôme Magnin86cef232018-12-28 14:49:08 +01005580 !htx_add_header(htx, ist("Content-Type"), ist("text/html")))
5581 goto fail;
5582 if (status == 401 && !htx_add_header(htx, ist("WWW-Authenticate"), ist2(trash.area, trash.data)))
5583 goto fail;
5584 if (status == 407 && !htx_add_header(htx, ist("Proxy-Authenticate"), ist2(trash.area, trash.data)))
Christopher Faulet12c51e22018-11-28 15:59:42 +01005585 goto fail;
Willy Tarreau0a7ef022019-05-28 10:30:11 +02005586 if (!htx_add_endof(htx, HTX_BLK_EOH))
5587 goto fail;
5588
5589 while (body.len) {
5590 size_t sent = htx_add_data(htx, body);
5591 if (!sent)
5592 goto fail;
5593 body.ptr += sent;
5594 body.len -= sent;
5595 }
5596
5597 if (!htx_add_endof(htx, HTX_BLK_EOM))
Christopher Faulet12c51e22018-11-28 15:59:42 +01005598 goto fail;
5599
5600 data = htx->data - co_data(res);
Christopher Faulet12c51e22018-11-28 15:59:42 +01005601 c_adv(res, data);
5602 res->total += data;
5603
5604 channel_auto_read(&s->req);
5605 channel_abort(&s->req);
5606 channel_auto_close(&s->req);
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005607 channel_htx_erase(&s->req, htxbuf(&s->req.buf));
Christopher Faulet12c51e22018-11-28 15:59:42 +01005608
5609 res->wex = tick_add_ifset(now_ms, res->wto);
5610 channel_auto_read(res);
5611 channel_auto_close(res);
5612 channel_shutr_now(res);
5613 return 0;
5614
5615 fail:
5616 /* If an error occurred, remove the incomplete HTTP response from the
5617 * buffer */
Christopher Faulet202c6ce2019-01-07 14:57:35 +01005618 channel_htx_truncate(res, htx);
Christopher Faulet12c51e22018-11-28 15:59:42 +01005619 return -1;
5620}
5621
Christopher Faulet0f226952018-10-22 09:29:56 +02005622/*
5623 * Capture headers from message <htx> according to header list <cap_hdr>, and
5624 * fill the <cap> pointers appropriately.
5625 */
5626static void htx_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
5627{
5628 struct cap_hdr *h;
5629 int32_t pos;
5630
Christopher Fauleta3f15502019-05-13 15:27:23 +02005631 for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
Christopher Faulet0f226952018-10-22 09:29:56 +02005632 struct htx_blk *blk = htx_get_blk(htx, pos);
5633 enum htx_blk_type type = htx_get_blk_type(blk);
5634 struct ist n, v;
5635
5636 if (type == HTX_BLK_EOH)
5637 break;
5638 if (type != HTX_BLK_HDR)
5639 continue;
5640
5641 n = htx_get_blk_name(htx, blk);
5642
5643 for (h = cap_hdr; h; h = h->next) {
5644 if (h->namelen && (h->namelen == n.len) &&
5645 (strncasecmp(n.ptr, h->name, h->namelen) == 0)) {
5646 if (cap[h->index] == NULL)
5647 cap[h->index] =
5648 pool_alloc(h->pool);
5649
5650 if (cap[h->index] == NULL) {
5651 ha_alert("HTTP capture : out of memory.\n");
5652 break;
5653 }
5654
5655 v = htx_get_blk_value(htx, blk);
5656 if (v.len > h->len)
5657 v.len = h->len;
5658
5659 memcpy(cap[h->index], v.ptr, v.len);
5660 cap[h->index][v.len]=0;
5661 }
5662 }
5663 }
5664}
5665
Christopher Faulet0b6bdc52018-10-24 11:05:36 +02005666/* Delete a value in a header between delimiters <from> and <next>. The header
5667 * itself is delimited by <start> and <end> pointers. The number of characters
5668 * displaced is returned, and the pointer to the first delimiter is updated if
5669 * required. The function tries as much as possible to respect the following
5670 * principles :
5671 * - replace <from> delimiter by the <next> one unless <from> points to <start>,
5672 * in which case <next> is simply removed
5673 * - set exactly one space character after the new first delimiter, unless there
5674 * are not enough characters in the block being moved to do so.
5675 * - remove unneeded spaces before the previous delimiter and after the new
5676 * one.
5677 *
5678 * It is the caller's responsibility to ensure that :
5679 * - <from> points to a valid delimiter or <start> ;
5680 * - <next> points to a valid delimiter or <end> ;
5681 * - there are non-space chars before <from>.
5682 */
5683static int htx_del_hdr_value(char *start, char *end, char **from, char *next)
5684{
5685 char *prev = *from;
5686
5687 if (prev == start) {
5688 /* We're removing the first value. eat the semicolon, if <next>
5689 * is lower than <end> */
5690 if (next < end)
5691 next++;
5692
5693 while (next < end && HTTP_IS_SPHT(*next))
5694 next++;
5695 }
5696 else {
5697 /* Remove useless spaces before the old delimiter. */
5698 while (HTTP_IS_SPHT(*(prev-1)))
5699 prev--;
5700 *from = prev;
5701
5702 /* copy the delimiter and if possible a space if we're
5703 * not at the end of the line.
5704 */
5705 if (next < end) {
5706 *prev++ = *next++;
5707 if (prev + 1 < next)
5708 *prev++ = ' ';
5709 while (next < end && HTTP_IS_SPHT(*next))
5710 next++;
5711 }
5712 }
5713 memmove(prev, next, end - next);
5714 return (prev - next);
5715}
5716
Christopher Faulet0f226952018-10-22 09:29:56 +02005717
5718/* Formats the start line of the request (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08005719 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Faulet0f226952018-10-22 09:29:56 +02005720 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005721static size_t htx_fmt_req_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Faulet0f226952018-10-22 09:29:56 +02005722{
5723 struct ist dst = ist2(str, 0);
5724
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005725 if (istcat(&dst, htx_sl_req_meth(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005726 goto end;
5727 if (dst.len + 1 > len)
5728 goto end;
5729 dst.ptr[dst.len++] = ' ';
5730
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005731 if (istcat(&dst, htx_sl_req_uri(sl), len) == -1)
Christopher Faulet0f226952018-10-22 09:29:56 +02005732 goto end;
5733 if (dst.len + 1 > len)
5734 goto end;
5735 dst.ptr[dst.len++] = ' ';
5736
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005737 istcat(&dst, htx_sl_req_vsn(sl), len);
Christopher Faulet0f226952018-10-22 09:29:56 +02005738 end:
5739 return dst.len;
5740}
5741
Christopher Fauletf0523542018-10-24 11:06:58 +02005742/* Formats the start line of the response (without CRLF) and puts it in <str> and
Joseph Herlantc42c0e92018-11-25 10:43:27 -08005743 * return the written length. The line can be truncated if it exceeds <len>.
Christopher Fauletf0523542018-10-24 11:06:58 +02005744 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005745static size_t htx_fmt_res_line(const struct htx_sl *sl, char *str, size_t len)
Christopher Fauletf0523542018-10-24 11:06:58 +02005746{
5747 struct ist dst = ist2(str, 0);
5748
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005749 if (istcat(&dst, htx_sl_res_vsn(sl), len) == -1)
Christopher Fauletf0523542018-10-24 11:06:58 +02005750 goto end;
5751 if (dst.len + 1 > len)
5752 goto end;
5753 dst.ptr[dst.len++] = ' ';
5754
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005755 if (istcat(&dst, htx_sl_res_code(sl), len) == -1)
Christopher Fauletf0523542018-10-24 11:06:58 +02005756 goto end;
5757 if (dst.len + 1 > len)
5758 goto end;
5759 dst.ptr[dst.len++] = ' ';
5760
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005761 istcat(&dst, htx_sl_res_reason(sl), len);
Christopher Fauletf0523542018-10-24 11:06:58 +02005762 end:
5763 return dst.len;
5764}
5765
5766
Christopher Faulet0f226952018-10-22 09:29:56 +02005767/*
5768 * Print a debug line with a start line.
5769 */
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005770static void htx_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl)
Christopher Faulet0f226952018-10-22 09:29:56 +02005771{
5772 struct session *sess = strm_sess(s);
5773 int max;
5774
5775 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5776 dir,
5777 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
5778 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
5779
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005780 max = HTX_SL_P1_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005781 UBOUND(max, trash.size - trash.data - 3);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005782 chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005783 trash.area[trash.data++] = ' ';
5784
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005785 max = HTX_SL_P2_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005786 UBOUND(max, trash.size - trash.data - 2);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005787 chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005788 trash.area[trash.data++] = ' ';
5789
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005790 max = HTX_SL_P3_LEN(sl);
Christopher Faulet0f226952018-10-22 09:29:56 +02005791 UBOUND(max, trash.size - trash.data - 1);
Christopher Fauletf1ba18d2018-11-26 21:37:08 +01005792 chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max);
Christopher Faulet0f226952018-10-22 09:29:56 +02005793 trash.area[trash.data++] = '\n';
5794
5795 shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
5796}
5797
5798/*
5799 * Print a debug line with a header.
5800 */
5801static void htx_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v)
5802{
5803 struct session *sess = strm_sess(s);
5804 int max;
5805
5806 chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
5807 dir,
5808 objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
5809 objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
5810
5811 max = n.len;
5812 UBOUND(max, trash.size - trash.data - 3);
5813 chunk_memcat(&trash, n.ptr, max);
5814 trash.area[trash.data++] = ':';
5815 trash.area[trash.data++] = ' ';
5816
5817 max = v.len;
5818 UBOUND(max, trash.size - trash.data - 1);
5819 chunk_memcat(&trash, v.ptr, max);
5820 trash.area[trash.data++] = '\n';
5821
5822 shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
5823}
5824
5825
Christopher Fauletf4eb75d2018-10-11 15:55:07 +02005826__attribute__((constructor))
5827static void __htx_protocol_init(void)
5828{
5829}
5830
5831
5832/*
5833 * Local variables:
5834 * c-indent-level: 8
5835 * c-basic-offset: 8
5836 * End:
5837 */