blob: bc38c571040db42f02a2d89e403de93c39bd3622 [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Backend variables and functions.
3 *
Willy Tarreau1a7eca12013-01-07 22:38:03 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +02005 *
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
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <syslog.h>
Willy Tarreauf19cf372006-11-14 15:40:51 +010018#include <string.h>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +020019#include <ctype.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040020#include <sys/types.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
Willy Tarreauc7e42382012-08-24 19:22:53 +020022#include <common/buffer.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020023#include <common/compat.h>
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020024#include <common/config.h>
Willy Tarreau7c669d72008-06-20 15:04:11 +020025#include <common/debug.h>
Bhaskar98634f02013-10-29 23:30:51 -040026#include <common/hash.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010027#include <common/initcall.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +020028#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020029#include <common/time.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010030#include <common/namespace.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020031
Willy Tarreaubaaee002006-06-26 02:48:02 +020032#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020033
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +010034#include <proto/acl.h>
Willy Tarreau34db1082012-04-19 17:16:54 +020035#include <proto/arg.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020036#include <proto/backend.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020037#include <proto/channel.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +020038#include <proto/frontend.h>
Willy Tarreau6b2e11b2009-10-01 07:52:15 +020039#include <proto/lb_chash.h>
Willy Tarreauf09c6602012-02-13 17:12:08 +010040#include <proto/lb_fas.h>
Willy Tarreauf89c1872009-10-01 11:19:37 +020041#include <proto/lb_fwlc.h>
42#include <proto/lb_fwrr.h>
43#include <proto/lb_map.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020044#include <proto/log.h>
Willy Tarreau53a47662017-08-28 10:53:00 +020045#include <proto/mux_pt.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010046#include <proto/obj_type.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010047#include <proto/payload.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020048#include <proto/protocol.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020049#include <proto/proto_http.h>
Willy Tarreaua8f55d52010-05-31 17:44:19 +020050#include <proto/proto_tcp.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020051#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020052#include <proto/queue.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010053#include <proto/sample.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +010054#include <proto/server.h>
Olivier Houchard00cf70f2018-11-30 17:24:55 +010055#include <proto/session.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020056#include <proto/stream.h>
Willy Tarreau9e000c62011-03-10 14:03:36 +010057#include <proto/stream_interface.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020058#include <proto/task.h>
59
Willy Tarreau732eac42015-07-09 11:40:25 +020060#ifdef USE_OPENSSL
61#include <proto/ssl_sock.h>
62#endif /* USE_OPENSSL */
63
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050064int be_lastsession(const struct proxy *be)
65{
66 if (be->be_counters.last_sess)
67 return now.tv_sec - be->be_counters.last_sess;
68
69 return -1;
70}
71
Bhaskar98634f02013-10-29 23:30:51 -040072/* helper function to invoke the correct hash method */
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070073static unsigned int gen_hash(const struct proxy* px, const char* key, unsigned long len)
Bhaskar98634f02013-10-29 23:30:51 -040074{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070075 unsigned int hash;
Bhaskar98634f02013-10-29 23:30:51 -040076
77 switch (px->lbprm.algo & BE_LB_HASH_FUNC) {
78 case BE_LB_HFCN_DJB2:
79 hash = hash_djb2(key, len);
80 break;
Willy Tarreaua0f42712013-11-14 14:30:35 +010081 case BE_LB_HFCN_WT6:
82 hash = hash_wt6(key, len);
83 break;
Willy Tarreau324f07f2015-01-20 19:44:50 +010084 case BE_LB_HFCN_CRC32:
85 hash = hash_crc32(key, len);
86 break;
Bhaskar98634f02013-10-29 23:30:51 -040087 case BE_LB_HFCN_SDBM:
88 /* this is the default hash function */
89 default:
90 hash = hash_sdbm(key, len);
91 break;
92 }
93
94 return hash;
95}
96
Willy Tarreaubaaee002006-06-26 02:48:02 +020097/*
98 * This function recounts the number of usable active and backup servers for
99 * proxy <p>. These numbers are returned into the p->srv_act and p->srv_bck.
Willy Tarreaub625a082007-11-26 01:15:43 +0100100 * This function also recomputes the total active and backup weights. However,
Willy Tarreauf4cca452008-03-08 21:42:54 +0100101 * it does not update tot_weight nor tot_used. Use update_backend_weight() for
Willy Tarreaub625a082007-11-26 01:15:43 +0100102 * this.
Emeric Brun52a91d32017-08-31 14:41:55 +0200103 * This functions is designed to be called before server's weight and state
104 * commit so it uses 'next' weight and states values.
Christopher Faulet5b517552017-06-09 14:17:53 +0200105 *
106 * threads: this is the caller responsibility to lock data. For now, this
107 * function is called from lb modules, so it should be ok. But if you need to
108 * call it from another place, be careful (and update this comment).
Willy Tarreaubaaee002006-06-26 02:48:02 +0200109 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200110void recount_servers(struct proxy *px)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200111{
112 struct server *srv;
113
Willy Tarreau20697042007-11-15 23:26:18 +0100114 px->srv_act = px->srv_bck = 0;
115 px->lbprm.tot_wact = px->lbprm.tot_wbck = 0;
Willy Tarreaub625a082007-11-26 01:15:43 +0100116 px->lbprm.fbck = NULL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200117 for (srv = px->srv; srv != NULL; srv = srv->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +0200118 if (!srv_willbe_usable(srv))
Willy Tarreaub625a082007-11-26 01:15:43 +0100119 continue;
120
Willy Tarreauc93cd162014-05-13 15:54:22 +0200121 if (srv->flags & SRV_F_BACKUP) {
Willy Tarreaub625a082007-11-26 01:15:43 +0100122 if (!px->srv_bck &&
Willy Tarreauf4cca452008-03-08 21:42:54 +0100123 !(px->options & PR_O_USE_ALL_BK))
Willy Tarreaub625a082007-11-26 01:15:43 +0100124 px->lbprm.fbck = srv;
125 px->srv_bck++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400126 srv->cumulative_weight = px->lbprm.tot_wbck;
Emeric Brun52a91d32017-08-31 14:41:55 +0200127 px->lbprm.tot_wbck += srv->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100128 } else {
129 px->srv_act++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400130 srv->cumulative_weight = px->lbprm.tot_wact;
Emeric Brun52a91d32017-08-31 14:41:55 +0200131 px->lbprm.tot_wact += srv->next_eweight;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200132 }
133 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100134}
Willy Tarreau20697042007-11-15 23:26:18 +0100135
Willy Tarreaub625a082007-11-26 01:15:43 +0100136/* This function simply updates the backend's tot_weight and tot_used values
137 * after servers weights have been updated. It is designed to be used after
138 * recount_servers() or equivalent.
Christopher Faulet5b517552017-06-09 14:17:53 +0200139 *
140 * threads: this is the caller responsibility to lock data. For now, this
141 * function is called from lb modules, so it should be ok. But if you need to
142 * call it from another place, be careful (and update this comment).
Willy Tarreaub625a082007-11-26 01:15:43 +0100143 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200144void update_backend_weight(struct proxy *px)
Willy Tarreaub625a082007-11-26 01:15:43 +0100145{
Willy Tarreau20697042007-11-15 23:26:18 +0100146 if (px->srv_act) {
147 px->lbprm.tot_weight = px->lbprm.tot_wact;
148 px->lbprm.tot_used = px->srv_act;
149 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100150 else if (px->lbprm.fbck) {
151 /* use only the first backup server */
Emeric Brun52a91d32017-08-31 14:41:55 +0200152 px->lbprm.tot_weight = px->lbprm.fbck->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100153 px->lbprm.tot_used = 1;
Willy Tarreau20697042007-11-15 23:26:18 +0100154 }
155 else {
Willy Tarreaub625a082007-11-26 01:15:43 +0100156 px->lbprm.tot_weight = px->lbprm.tot_wbck;
157 px->lbprm.tot_used = px->srv_bck;
Willy Tarreau20697042007-11-15 23:26:18 +0100158 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100159}
160
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200161/*
162 * This function tries to find a running server for the proxy <px> following
163 * the source hash method. Depending on the number of active/backup servers,
164 * it will either look for active servers, or for backup servers.
165 * If any server is found, it will be returned. If no valid server is found,
166 * NULL is returned.
167 */
Christopher Fauletf0614e82017-06-09 14:20:29 +0200168static struct server *get_server_sh(struct proxy *px, const char *addr, int len)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200169{
170 unsigned int h, l;
171
172 if (px->lbprm.tot_weight == 0)
173 return NULL;
174
175 l = h = 0;
176
177 /* note: we won't hash if there's only one server left */
178 if (px->lbprm.tot_used == 1)
179 goto hash_done;
180
181 while ((l + sizeof (int)) <= len) {
182 h ^= ntohl(*(unsigned int *)(&addr[l]));
183 l += sizeof (int);
184 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500185 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100186 h = full_hash(h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200187 hash_done:
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200188 if (px->lbprm.algo & BE_LB_LKUP_CHTREE)
189 return chash_get_server_hash(px, h);
190 else
191 return map_get_server_hash(px, h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200192}
193
194/*
195 * This function tries to find a running server for the proxy <px> following
196 * the URI hash method. In order to optimize cache hits, the hash computation
197 * ends at the question mark. Depending on the number of active/backup servers,
198 * it will either look for active servers, or for backup servers.
199 * If any server is found, it will be returned. If no valid server is found,
200 * NULL is returned.
201 *
202 * This code was contributed by Guillaume Dallaire, who also selected this hash
203 * algorithm out of a tens because it gave him the best results.
204 *
205 */
Christopher Fauletf0614e82017-06-09 14:20:29 +0200206static struct server *get_server_uh(struct proxy *px, char *uri, int uri_len)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200207{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700208 unsigned int hash = 0;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200209 int c;
210 int slashes = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400211 const char *start, *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200212
213 if (px->lbprm.tot_weight == 0)
214 return NULL;
215
216 /* note: we won't hash if there's only one server left */
217 if (px->lbprm.tot_used == 1)
218 goto hash_done;
219
220 if (px->uri_len_limit)
221 uri_len = MIN(uri_len, px->uri_len_limit);
222
Bhaskar98634f02013-10-29 23:30:51 -0400223 start = end = uri;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200224 while (uri_len--) {
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200225 c = *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200226 if (c == '/') {
227 slashes++;
228 if (slashes == px->uri_dirs_depth1) /* depth+1 */
229 break;
230 }
Oskar Stolc8dc41842012-05-19 10:19:54 +0100231 else if (c == '?' && !px->uri_whole)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200232 break;
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200233 end++;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200234 }
Bhaskar98634f02013-10-29 23:30:51 -0400235
236 hash = gen_hash(px, start, (end - start));
237
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500238 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100239 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200240 hash_done:
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200241 if (px->lbprm.algo & BE_LB_LKUP_CHTREE)
242 return chash_get_server_hash(px, hash);
243 else
244 return map_get_server_hash(px, hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200245}
246
Christopher Faulet5b517552017-06-09 14:17:53 +0200247/*
Willy Tarreau01732802007-11-01 22:48:15 +0100248 * This function tries to find a running server for the proxy <px> following
249 * the URL parameter hash method. It looks for a specific parameter in the
250 * URL and hashes it to compute the server ID. This is useful to optimize
251 * performance by avoiding bounces between servers in contexts where sessions
252 * are shared but cookies are not usable. If the parameter is not found, NULL
253 * is returned. If any server is found, it will be returned. If no valid server
254 * is found, NULL is returned.
Willy Tarreau01732802007-11-01 22:48:15 +0100255 */
Christopher Faulet8fe48912017-06-09 14:23:09 +0200256static struct server *get_server_ph(struct proxy *px, const char *uri, int uri_len)
Willy Tarreau01732802007-11-01 22:48:15 +0100257{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700258 unsigned int hash = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400259 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200260 const char *p;
261 const char *params;
Willy Tarreau01732802007-11-01 22:48:15 +0100262 int plen;
263
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200264 /* when tot_weight is 0 then so is srv_count */
Willy Tarreau20697042007-11-15 23:26:18 +0100265 if (px->lbprm.tot_weight == 0)
Willy Tarreau01732802007-11-01 22:48:15 +0100266 return NULL;
267
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200268 if ((p = memchr(uri, '?', uri_len)) == NULL)
269 return NULL;
270
Willy Tarreau01732802007-11-01 22:48:15 +0100271 p++;
272
273 uri_len -= (p - uri);
274 plen = px->url_param_len;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200275 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100276
277 while (uri_len > plen) {
278 /* Look for the parameter name followed by an equal symbol */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200279 if (params[plen] == '=') {
280 if (memcmp(params, px->url_param_name, plen) == 0) {
281 /* OK, we have the parameter here at <params>, and
Willy Tarreau01732802007-11-01 22:48:15 +0100282 * the value after the equal sign, at <p>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200283 * skip the equal symbol
Willy Tarreau01732802007-11-01 22:48:15 +0100284 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200285 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400286 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200287 uri_len -= plen + 1;
288
Bhaskar98634f02013-10-29 23:30:51 -0400289 while (uri_len && *end != '&') {
Willy Tarreau01732802007-11-01 22:48:15 +0100290 uri_len--;
Bhaskar98634f02013-10-29 23:30:51 -0400291 end++;
Willy Tarreau01732802007-11-01 22:48:15 +0100292 }
Bhaskar98634f02013-10-29 23:30:51 -0400293 hash = gen_hash(px, start, (end - start));
294
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500295 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100296 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400297
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200298 if (px->lbprm.algo & BE_LB_LKUP_CHTREE)
299 return chash_get_server_hash(px, hash);
300 else
301 return map_get_server_hash(px, hash);
Willy Tarreau01732802007-11-01 22:48:15 +0100302 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200303 }
304 /* skip to next parameter */
305 p = memchr(params, '&', uri_len);
306 if (!p)
307 return NULL;
308 p++;
309 uri_len -= (p - params);
310 params = p;
311 }
312 return NULL;
313}
314
315/*
316 * this does the same as the previous server_ph, but check the body contents
317 */
Christopher Faulet8fe48912017-06-09 14:23:09 +0200318static struct server *get_server_ph_post(struct stream *s)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200319{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700320 unsigned int hash = 0;
Willy Tarreaueee5b512015-04-03 23:46:31 +0200321 struct http_txn *txn = s->txn;
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100322 struct channel *req = &s->req;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200323 struct http_msg *msg = &txn->req;
324 struct proxy *px = s->be;
325 unsigned int plen = px->url_param_len;
Willy Tarreau2d8e4852014-04-17 20:08:17 +0200326 unsigned long len = http_body_bytes(msg);
Willy Tarreau188e2302018-06-15 11:11:53 +0200327 const char *params = c_ptr(req, -http_data_rewind(msg));
Willy Tarreau157dd632009-12-06 19:18:09 +0100328 const char *p = params;
Bhaskar98634f02013-10-29 23:30:51 -0400329 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200330
Willy Tarreau157dd632009-12-06 19:18:09 +0100331 if (len == 0)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200332 return NULL;
333
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200334 if (len > b_wrap(&req->buf) - p)
335 len = b_wrap(&req->buf) - p;
Willy Tarreauf69d4ff2015-05-02 00:05:47 +0200336
Willy Tarreau157dd632009-12-06 19:18:09 +0100337 if (px->lbprm.tot_weight == 0)
338 return NULL;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200339
340 while (len > plen) {
341 /* Look for the parameter name followed by an equal symbol */
342 if (params[plen] == '=') {
343 if (memcmp(params, px->url_param_name, plen) == 0) {
344 /* OK, we have the parameter here at <params>, and
345 * the value after the equal sign, at <p>
346 * skip the equal symbol
347 */
348 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400349 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200350 len -= plen + 1;
351
Bhaskar98634f02013-10-29 23:30:51 -0400352 while (len && *end != '&') {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200353 if (unlikely(!HTTP_IS_TOKEN(*p))) {
Willy Tarreau157dd632009-12-06 19:18:09 +0100354 /* if in a POST, body must be URI encoded or it's not a URI.
Bhaskar98634f02013-10-29 23:30:51 -0400355 * Do not interpret any possible binary data as a parameter.
Willy Tarreau157dd632009-12-06 19:18:09 +0100356 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200357 if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */
358 break;
359 return NULL; /* oh, no; this is not uri-encoded.
360 * This body does not contain parameters.
361 */
362 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200363 len--;
Bhaskar98634f02013-10-29 23:30:51 -0400364 end++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200365 /* should we break if vlen exceeds limit? */
366 }
Bhaskar98634f02013-10-29 23:30:51 -0400367 hash = gen_hash(px, start, (end - start));
368
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500369 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100370 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400371
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200372 if (px->lbprm.algo & BE_LB_LKUP_CHTREE)
373 return chash_get_server_hash(px, hash);
374 else
375 return map_get_server_hash(px, hash);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200376 }
377 }
Willy Tarreau01732802007-11-01 22:48:15 +0100378 /* skip to next parameter */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200379 p = memchr(params, '&', len);
Willy Tarreau01732802007-11-01 22:48:15 +0100380 if (!p)
381 return NULL;
382 p++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200383 len -= (p - params);
384 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100385 }
386 return NULL;
387}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200388
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200389
Willy Tarreaubaaee002006-06-26 02:48:02 +0200390/*
Benoitaffb4812009-03-25 13:02:10 +0100391 * This function tries to find a running server for the proxy <px> following
392 * the Header parameter hash method. It looks for a specific parameter in the
393 * URL and hashes it to compute the server ID. This is useful to optimize
394 * performance by avoiding bounces between servers in contexts where sessions
395 * are shared but cookies are not usable. If the parameter is not found, NULL
396 * is returned. If any server is found, it will be returned. If no valid server
397 * is found, NULL is returned.
398 */
Christopher Faulet8fe48912017-06-09 14:23:09 +0200399static struct server *get_server_hh(struct stream *s)
Benoitaffb4812009-03-25 13:02:10 +0100400{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700401 unsigned int hash = 0;
Willy Tarreaueee5b512015-04-03 23:46:31 +0200402 struct http_txn *txn = s->txn;
Benoitaffb4812009-03-25 13:02:10 +0100403 struct proxy *px = s->be;
404 unsigned int plen = px->hh_len;
405 unsigned long len;
406 struct hdr_ctx ctx;
407 const char *p;
Bhaskar98634f02013-10-29 23:30:51 -0400408 const char *start, *end;
Benoitaffb4812009-03-25 13:02:10 +0100409
410 /* tot_weight appears to mean srv_count */
411 if (px->lbprm.tot_weight == 0)
412 return NULL;
413
Benoitaffb4812009-03-25 13:02:10 +0100414 ctx.idx = 0;
415
416 /* if the message is chunked, we skip the chunk size, but use the value as len */
Willy Tarreau188e2302018-06-15 11:11:53 +0200417 http_find_header2(px->hh_name, plen, c_ptr(&s->req, -http_hdr_rewind(&txn->req)), &txn->hdr_idx, &ctx);
Benoitaffb4812009-03-25 13:02:10 +0100418
419 /* if the header is not found or empty, let's fallback to round robin */
420 if (!ctx.idx || !ctx.vlen)
421 return NULL;
422
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200423 /* note: we won't hash if there's only one server left */
424 if (px->lbprm.tot_used == 1)
425 goto hash_done;
426
Benoitaffb4812009-03-25 13:02:10 +0100427 /* Found a the hh_name in the headers.
428 * we will compute the hash based on this value ctx.val.
429 */
430 len = ctx.vlen;
431 p = (char *)ctx.line + ctx.val;
432 if (!px->hh_match_domain) {
Bhaskar98634f02013-10-29 23:30:51 -0400433 hash = gen_hash(px, p, len);
Benoitaffb4812009-03-25 13:02:10 +0100434 } else {
435 int dohash = 0;
Cyril Bontéf607d812015-01-04 15:17:36 +0100436 p += len;
Benoitaffb4812009-03-25 13:02:10 +0100437 /* special computation, use only main domain name, not tld/host
438 * going back from the end of string, start hashing at first
439 * dot stop at next.
440 * This is designed to work with the 'Host' header, and requires
441 * a special option to activate this.
442 */
Cyril Bontéf607d812015-01-04 15:17:36 +0100443 end = p;
Benoitaffb4812009-03-25 13:02:10 +0100444 while (len) {
Cyril Bontéf607d812015-01-04 15:17:36 +0100445 if (dohash) {
446 /* Rewind the pointer until the previous char
447 * is a dot, this will allow to set the start
448 * position of the domain. */
449 if (*(p - 1) == '.')
Benoitaffb4812009-03-25 13:02:10 +0100450 break;
Benoitaffb4812009-03-25 13:02:10 +0100451 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100452 else if (*p == '.') {
453 /* The pointer is rewinded to the dot before the
454 * tld, we memorize the end of the domain and
455 * can enter the domain processing. */
456 end = p;
457 dohash = 1;
458 }
Benoitaffb4812009-03-25 13:02:10 +0100459 p--;
Cyril Bontéf607d812015-01-04 15:17:36 +0100460 len--;
Benoitaffb4812009-03-25 13:02:10 +0100461 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100462 start = p;
Bhaskar98634f02013-10-29 23:30:51 -0400463 hash = gen_hash(px, start, (end - start));
Benoitaffb4812009-03-25 13:02:10 +0100464 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500465 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100466 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200467 hash_done:
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200468 if (px->lbprm.algo & BE_LB_LKUP_CHTREE)
469 return chash_get_server_hash(px, hash);
470 else
471 return map_get_server_hash(px, hash);
Benoitaffb4812009-03-25 13:02:10 +0100472}
473
Willy Tarreau34db1082012-04-19 17:16:54 +0200474/* RDP Cookie HASH. */
Christopher Faulet8fe48912017-06-09 14:23:09 +0200475static struct server *get_server_rch(struct stream *s)
Emeric Brun736aa232009-06-30 17:56:00 +0200476{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700477 unsigned int hash = 0;
Emeric Brun736aa232009-06-30 17:56:00 +0200478 struct proxy *px = s->be;
479 unsigned long len;
Emeric Brun736aa232009-06-30 17:56:00 +0200480 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +0200481 struct sample smp;
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200482 int rewind;
Emeric Brun736aa232009-06-30 17:56:00 +0200483
484 /* tot_weight appears to mean srv_count */
485 if (px->lbprm.tot_weight == 0)
486 return NULL;
487
Willy Tarreau37406352012-04-23 16:16:37 +0200488 memset(&smp, 0, sizeof(smp));
Emeric Brun736aa232009-06-30 17:56:00 +0200489
Willy Tarreau6a445eb2018-06-19 07:04:45 +0200490 rewind = co_data(&s->req);
491 c_rew(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200492
Willy Tarreaucadd8c92013-07-22 18:09:52 +0200493 ret = fetch_rdp_cookie_name(s, &smp, px->hh_name, px->hh_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200494 len = smp.data.u.str.data;
Willy Tarreau664092c2011-12-16 19:11:42 +0100495
Willy Tarreaubcbd3932018-06-06 07:13:22 +0200496 c_adv(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200497
Willy Tarreau37406352012-04-23 16:16:37 +0200498 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0)
Emeric Brun736aa232009-06-30 17:56:00 +0200499 return NULL;
500
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200501 /* note: we won't hash if there's only one server left */
502 if (px->lbprm.tot_used == 1)
503 goto hash_done;
504
Emeric Brun736aa232009-06-30 17:56:00 +0200505 /* Found a the hh_name in the headers.
506 * we will compute the hash based on this value ctx.val.
507 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200508 hash = gen_hash(px, smp.data.u.str.area, len);
Bhaskar98634f02013-10-29 23:30:51 -0400509
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500510 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100511 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200512 hash_done:
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200513 if (px->lbprm.algo & BE_LB_LKUP_CHTREE)
514 return chash_get_server_hash(px, hash);
515 else
516 return map_get_server_hash(px, hash);
Emeric Brun736aa232009-06-30 17:56:00 +0200517}
Christopher Faulet5b517552017-06-09 14:17:53 +0200518
Willy Tarreau760e81d2018-05-03 07:20:40 +0200519/* random value */
520static struct server *get_server_rnd(struct stream *s)
521{
522 unsigned int hash = 0;
523 struct proxy *px = s->be;
524
525 /* tot_weight appears to mean srv_count */
526 if (px->lbprm.tot_weight == 0)
527 return NULL;
528
529 /* ensure all 32 bits are covered as long as RAND_MAX >= 65535 */
530 hash = ((uint64_t)random() * ((uint64_t)RAND_MAX + 1)) ^ random();
531 return chash_get_server_hash(px, hash);
532}
533
Benoitaffb4812009-03-25 13:02:10 +0100534/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200535 * This function applies the load-balancing algorithm to the stream, as
536 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200537 * 'assigned'.
538 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200539 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200540 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100541 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200542 * The function tries to keep the original connection slot if it reconnects to
543 * the same server, otherwise it releases it and tries to offer it.
544 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200545 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200546 *
547 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100548 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200549 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
550 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200551 * SRV_STATUS_INTERNAL for other unrecoverable errors.
552 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200553 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100554 * it does not need to be called anymore. This means that target_srv(&s->target)
555 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200556 *
557 */
558
Willy Tarreau87b09662015-04-03 00:22:06 +0200559int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200560{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100561 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200562 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100563 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200564 int err;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100565 int i;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100566
Simon Horman8effd3d2011-08-13 08:03:52 +0900567 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200568
Willy Tarreau7c669d72008-06-20 15:04:11 +0200569 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200570 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200571 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100572
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100573 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200574 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200575
Willy Tarreau7c669d72008-06-20 15:04:11 +0200576 /* We have to release any connection slot before applying any LB algo,
577 * otherwise we may erroneously end up with no available slot.
578 */
579 if (conn_slot)
580 sess_change_server(s, NULL);
581
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100582 /* We will now try to find the good server and store it into <objt_server(s->target)>.
583 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200584 * as well as if no server is available (check error code).
585 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100586
Willy Tarreau827aee92011-03-10 16:55:02 +0100587 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100588 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100589
Olivier Houchardba4fff52018-12-01 14:40:40 +0100590 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
591 ((s->txn && s->txn->flags & TX_PREFER_LAST) ||
592 (s->be->options & PR_O_PREF_LAST))) {
593 for (i = 0; i < MAX_SRV_LIST; i++) {
594 struct server *tmpsrv = objt_server(s->sess->srv_list[i].target);
595
596 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100597 ((s->txn && s->txn->flags & TX_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100598 (!s->be->max_ka_queue ||
599 server_has_room(tmpsrv) || (
600 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
601 srv_currently_usable(tmpsrv)) {
602 list_for_each_entry(conn, &s->sess->srv_list[i].list, session_list) {
603 if (conn->flags & CO_FL_CONNECTED) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100604
Olivier Houchardba4fff52018-12-01 14:40:40 +0100605 srv = tmpsrv;
606 s->target = &srv->obj_type;
607 goto out_ok;
608 }
609 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100610 }
611 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100612 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100613 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200614
Willy Tarreau7c669d72008-06-20 15:04:11 +0200615 /* we must check if we have at least one server available */
616 if (!s->be->lbprm.tot_weight) {
617 err = SRV_STATUS_NOSRV;
618 goto out;
619 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200620
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200621 /* First check whether we need to fetch some data or simply call
622 * the LB lookup function. Only the hashing functions will need
623 * some input data in fact, and will support multiple algorithms.
624 */
625 switch (s->be->lbprm.algo & BE_LB_LKUP) {
626 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100627 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200628 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200629
Willy Tarreauf09c6602012-02-13 17:12:08 +0100630 case BE_LB_LKUP_FSTREE:
631 srv = fas_get_next_server(s->be, prev_srv);
632 break;
633
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200634 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100635 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200636 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200637
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200638 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200639 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200640 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200641 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
642 srv = get_server_rnd(s);
643 else if (s->be->lbprm.algo & BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100644 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200645 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100646 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200647 break;
648 }
649 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200650 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200651 err = SRV_STATUS_INTERNAL;
652 goto out;
653 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200654
655 switch (s->be->lbprm.algo & BE_LB_PARM) {
656 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200657 conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200658 if (conn && conn->addr.from.ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200659 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200660 (void *)&((struct sockaddr_in *)&conn->addr.from)->sin_addr,
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200661 4);
662 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200663 else if (conn && conn->addr.from.ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200664 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200665 (void *)&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr,
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200666 16);
667 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200668 else {
669 /* unknown IP family */
670 err = SRV_STATUS_INTERNAL;
671 goto out;
672 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200673 break;
674
675 case BE_LB_HASH_URI:
676 /* URI hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200677 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100678 break;
Willy Tarreau827aee92011-03-10 16:55:02 +0100679 srv = get_server_uh(s->be,
Willy Tarreau188e2302018-06-15 11:11:53 +0200680 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
Willy Tarreaueee5b512015-04-03 23:46:31 +0200681 s->txn->req.sl.rq.u_l);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200682 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200683
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200684 case BE_LB_HASH_PRM:
685 /* URL Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200686 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100687 break;
Willy Tarreau61a21a32011-03-01 20:35:49 +0100688
Willy Tarreau827aee92011-03-10 16:55:02 +0100689 srv = get_server_ph(s->be,
Willy Tarreau188e2302018-06-15 11:11:53 +0200690 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
Willy Tarreaueee5b512015-04-03 23:46:31 +0200691 s->txn->req.sl.rq.u_l);
Willy Tarreau61a21a32011-03-01 20:35:49 +0100692
Willy Tarreaueee5b512015-04-03 23:46:31 +0200693 if (!srv && s->txn->meth == HTTP_METH_POST)
Willy Tarreau827aee92011-03-10 16:55:02 +0100694 srv = get_server_ph_post(s);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200695 break;
Benoitaffb4812009-03-25 13:02:10 +0100696
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200697 case BE_LB_HASH_HDR:
698 /* Header Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200699 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100700 break;
Willy Tarreau827aee92011-03-10 16:55:02 +0100701 srv = get_server_hh(s);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200702 break;
703
704 case BE_LB_HASH_RDP:
705 /* RDP Cookie hashing */
Willy Tarreau827aee92011-03-10 16:55:02 +0100706 srv = get_server_rch(s);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200707 break;
708
709 default:
710 /* unknown balancing algorithm */
711 err = SRV_STATUS_INTERNAL;
712 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100713 }
Emeric Brun736aa232009-06-30 17:56:00 +0200714
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200715 /* If the hashing parameter was not found, let's fall
716 * back to round robin on the map.
717 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100718 if (!srv) {
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200719 if (s->be->lbprm.algo & BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100720 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200721 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100722 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200723 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200724
725 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200726 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200727
Willy Tarreau7c669d72008-06-20 15:04:11 +0200728 default:
729 /* unknown balancing algorithm */
730 err = SRV_STATUS_INTERNAL;
731 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200732 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200733
Willy Tarreau827aee92011-03-10 16:55:02 +0100734 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200735 err = SRV_STATUS_FULL;
736 goto out;
737 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100738 else if (srv != prev_srv) {
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200739 HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +0200740 HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100741 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100742 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200743 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200744 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100745 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200746 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100747 else if ((s->be->options & PR_O_HTTP_PROXY)) {
748 conn = cs_conn(objt_cs(s->si[1].end));
749
750 if (conn && is_addr(&conn->addr.to)) {
751 /* in proxy mode, we need a valid destination address */
752 s->target = &s->be->obj_type;
753 } else {
754 err = SRV_STATUS_NOSRV;
755 goto out;
756 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100757 }
758 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200759 err = SRV_STATUS_NOSRV;
760 goto out;
761 }
762
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100763out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200764 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200765 err = SRV_STATUS_OK;
766 out:
767
768 /* Either we take back our connection slot, or we offer it to someone
769 * else if we don't need it anymore.
770 */
771 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100772 if (conn_slot == srv) {
773 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200774 } else {
775 if (may_dequeue_tasks(conn_slot, s->be))
776 process_srv_queue(conn_slot);
777 }
778 }
779
780 out_err:
781 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200782}
783
Willy Tarreaubaaee002006-06-26 02:48:02 +0200784/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200785 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200786 * The address is taken from the currently assigned server, or from the
787 * dispatch or transparent address.
788 *
789 * It may return :
790 * SRV_STATUS_OK if everything is OK.
791 * SRV_STATUS_INTERNAL for other unrecoverable errors.
792 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200793 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200794 * not cleared, so it's to the caller to clear it if required.
795 *
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200796 * The caller is responsible for having already assigned a connection
797 * to si->end.
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200798 *
Willy Tarreaubaaee002006-06-26 02:48:02 +0200799 */
Olivier Houchard201b9f42018-11-21 00:16:29 +0100800int assign_server_address(struct stream *s, struct connection *srv_conn)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200801{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200802 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200803
Christopher Faulet56803b12017-11-24 16:06:18 +0100804 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200805
Willy Tarreaue7dff022015-04-03 01:14:29 +0200806 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200807 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200808 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200809 return SRV_STATUS_INTERNAL;
810
Willy Tarreau1e582e52018-09-20 11:29:28 +0200811 srv_conn->addr.to = __objt_server(s->target)->addr;
812 set_host_port(&srv_conn->addr.to, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200813
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200814 if (!is_addr(&srv_conn->addr.to) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200815 /* if the server has no address, we use the same address
816 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200817 * locally on multiple addresses at once. Nothing is done
818 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200819 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200820 conn_get_to_addr(cli_conn);
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200821
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200822 if (cli_conn->addr.to.ss_family == AF_INET) {
823 ((struct sockaddr_in *)&srv_conn->addr.to)->sin_addr = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
824 } else if (cli_conn->addr.to.ss_family == AF_INET6) {
825 ((struct sockaddr_in6 *)&srv_conn->addr.to)->sin6_addr = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Emeric Brunec810d12010-10-22 16:36:33 +0200826 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200827 }
828
Willy Tarreaubaaee002006-06-26 02:48:02 +0200829 /* if this server remaps proxied ports, we'll use
830 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +0200831 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +0100832 int base_port;
833
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200834 conn_get_to_addr(cli_conn);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100835
836 /* First, retrieve the port from the incoming connection */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200837 base_port = get_host_port(&cli_conn->addr.to);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100838
839 /* Second, assign the outgoing connection's port */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200840 base_port += get_host_port(&srv_conn->addr.to);
841 set_host_port(&srv_conn->addr.to, base_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200842 }
843 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200844 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200845 /* connect to the defined dispatch addr */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200846 srv_conn->addr.to = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200847 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200848 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200849 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200850 conn_get_to_addr(cli_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200851
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200852 if (cli_conn->addr.to.ss_family == AF_INET || cli_conn->addr.to.ss_family == AF_INET6)
853 srv_conn->addr.to = cli_conn->addr.to;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200854 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100855 else if (s->be->options & PR_O_HTTP_PROXY) {
856 /* If HTTP PROXY option is set, then server is already assigned
857 * during incoming client request parsing. */
858 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +0100859 else {
860 /* no server and no LB algorithm ! */
861 return SRV_STATUS_INTERNAL;
862 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200863
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100864 /* Copy network namespace from client connection */
Thierry FOURNIERfe1ebcd2014-12-19 13:37:11 +0100865 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100866
Willy Tarreaue7dff022015-04-03 01:14:29 +0200867 s->flags |= SF_ADDR_SET;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200868 return SRV_STATUS_OK;
869}
870
Willy Tarreau87b09662015-04-03 00:22:06 +0200871/* This function assigns a server to stream <s> if required, and can add the
Willy Tarreaubaaee002006-06-26 02:48:02 +0200872 * connection to either the assigned server's queue or to the proxy's queue.
Willy Tarreau87b09662015-04-03 00:22:06 +0200873 * If ->srv_conn is set, the stream is first released from the server.
Willy Tarreaue7dff022015-04-03 01:14:29 +0200874 * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will
Willy Tarreau7c669d72008-06-20 15:04:11 +0200875 * be called before any connection and after any retry or redispatch occurs.
876 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200877 * It is not allowed to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200878 *
879 * Returns :
880 *
881 * SRV_STATUS_OK if everything is OK.
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100882 * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200883 * SRV_STATUS_QUEUED if the connection has been queued.
884 * SRV_STATUS_FULL if the server(s) is/are saturated and the
Willy Tarreau827aee92011-03-10 16:55:02 +0100885 * connection could not be queued at the server's,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200886 * which may be NULL if we queue on the backend.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200887 * SRV_STATUS_INTERNAL for other unrecoverable errors.
888 *
889 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200890int assign_server_and_queue(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200891{
892 struct pendconn *p;
Willy Tarreau827aee92011-03-10 16:55:02 +0100893 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200894 int err;
895
896 if (s->pend_pos)
897 return SRV_STATUS_INTERNAL;
898
Willy Tarreau7c669d72008-06-20 15:04:11 +0200899 err = SRV_STATUS_OK;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200900 if (!(s->flags & SF_ASSIGNED)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100901 struct server *prev_srv = objt_server(s->target);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100902
Willy Tarreau7c669d72008-06-20 15:04:11 +0200903 err = assign_server(s);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100904 if (prev_srv) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200905 /* This stream was previously assigned to a server. We have to
906 * update the stream's and the server's stats :
Willy Tarreau7c669d72008-06-20 15:04:11 +0200907 * - if the server changed :
908 * - set TX_CK_DOWN if txn.flags was TX_CK_VALID
Willy Tarreaue7dff022015-04-03 01:14:29 +0200909 * - set SF_REDISP if it was successfully redispatched
Willy Tarreau7c669d72008-06-20 15:04:11 +0200910 * - increment srv->redispatches and be->redispatches
911 * - if the server remained the same : update retries.
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100912 */
913
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100914 if (prev_srv != objt_server(s->target)) {
Willy Tarreaueee5b512015-04-03 23:46:31 +0200915 if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) {
916 s->txn->flags &= ~TX_CK_MASK;
917 s->txn->flags |= TX_CK_DOWN;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200918 }
Willy Tarreaue7dff022015-04-03 01:14:29 +0200919 s->flags |= SF_REDISP;
Christopher Faulet29f77e82017-06-08 14:04:45 +0200920 HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200921 HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200922 } else {
Christopher Faulet29f77e82017-06-08 14:04:45 +0200923 HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200924 HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100925 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100926 }
927 }
928
Willy Tarreaubaaee002006-06-26 02:48:02 +0200929 switch (err) {
930 case SRV_STATUS_OK:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200931 /* we have SF_ASSIGNED set */
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100932 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +0100933 if (!srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200934 return SRV_STATUS_OK; /* dispatch or proxy mode */
935
936 /* If we already have a connection slot, no need to check any queue */
Willy Tarreau827aee92011-03-10 16:55:02 +0100937 if (s->srv_conn == srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200938 return SRV_STATUS_OK;
939
Willy Tarreau87b09662015-04-03 00:22:06 +0200940 /* OK, this stream already has an assigned server, but no
Willy Tarreau7c669d72008-06-20 15:04:11 +0200941 * connection slot yet. Either it is a redispatch, or it was
942 * assigned from persistence information (direct mode).
943 */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200944 if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200945 /* server scheduled for redirection, and already assigned. We
946 * don't want to go further nor check the queue.
Willy Tarreau21d2af32008-02-14 20:25:24 +0100947 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100948 sess_change_server(s, srv); /* not really needed in fact */
Willy Tarreau21d2af32008-02-14 20:25:24 +0100949 return SRV_STATUS_OK;
950 }
951
Willy Tarreau87b09662015-04-03 00:22:06 +0200952 /* We might have to queue this stream if the assigned server is full.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200953 * We know we have to queue it into the server's queue, so if a maxqueue
954 * is set on the server, we must also check that the server's queue is
955 * not full, in which case we have to return FULL.
956 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100957 if (srv->maxconn &&
958 (srv->nbpend || srv->served >= srv_dynamic_maxconn(srv))) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200959
Willy Tarreau827aee92011-03-10 16:55:02 +0100960 if (srv->maxqueue > 0 && srv->nbpend >= srv->maxqueue)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200961 return SRV_STATUS_FULL;
962
Willy Tarreaubaaee002006-06-26 02:48:02 +0200963 p = pendconn_add(s);
964 if (p)
965 return SRV_STATUS_QUEUED;
966 else
Willy Tarreau7c669d72008-06-20 15:04:11 +0200967 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200968 }
Willy Tarreau7c669d72008-06-20 15:04:11 +0200969
970 /* OK, we can use this server. Let's reserve our place */
Willy Tarreau827aee92011-03-10 16:55:02 +0100971 sess_change_server(s, srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200972 return SRV_STATUS_OK;
973
974 case SRV_STATUS_FULL:
Willy Tarreau87b09662015-04-03 00:22:06 +0200975 /* queue this stream into the proxy's queue */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200976 p = pendconn_add(s);
977 if (p)
978 return SRV_STATUS_QUEUED;
979 else
Willy Tarreau7c669d72008-06-20 15:04:11 +0200980 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200981
982 case SRV_STATUS_NOSRV:
Willy Tarreau7c669d72008-06-20 15:04:11 +0200983 return err;
984
Willy Tarreaubaaee002006-06-26 02:48:02 +0200985 case SRV_STATUS_INTERNAL:
986 return err;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200987
Willy Tarreaubaaee002006-06-26 02:48:02 +0200988 default:
989 return SRV_STATUS_INTERNAL;
990 }
Willy Tarreau5b6995c2008-01-13 16:31:17 +0100991}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200992
Willy Tarreaub1d67742010-03-29 19:36:59 +0200993/* If an explicit source binding is specified on the server and/or backend, and
994 * this source makes use of the transparent proxy, then it is extracted now and
Willy Tarreau87b09662015-04-03 00:22:06 +0200995 * assigned to the stream's pending connection. This function assumes that an
Willy Tarreau350f4872014-11-28 14:42:25 +0100996 * outgoing connection has already been assigned to s->si[1].end.
Willy Tarreaub1d67742010-03-29 19:36:59 +0200997 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200998static void assign_tproxy_address(struct stream *s)
Willy Tarreaub1d67742010-03-29 19:36:59 +0200999{
Willy Tarreau29fbe512015-08-20 19:35:14 +02001000#if defined(CONFIG_HAP_TRANSPARENT)
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001001 struct server *srv = objt_server(s->target);
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001002 struct conn_src *src;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001003 struct connection *cli_conn;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001004 struct connection *srv_conn = cs_conn(objt_cs(s->si[1].end));
Willy Tarreau827aee92011-03-10 16:55:02 +01001005
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001006 if (srv && srv->conn_src.opts & CO_SRC_BIND)
1007 src = &srv->conn_src;
1008 else if (s->be->conn_src.opts & CO_SRC_BIND)
1009 src = &s->be->conn_src;
1010 else
1011 return;
Willy Tarreau294c4732011-12-16 21:35:50 +01001012
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001013 switch (src->opts & CO_SRC_TPROXY_MASK) {
1014 case CO_SRC_TPROXY_ADDR:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001015 srv_conn->addr.from = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001016 break;
1017 case CO_SRC_TPROXY_CLI:
1018 case CO_SRC_TPROXY_CIP:
1019 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001020 cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001021 if (cli_conn)
1022 srv_conn->addr.from = cli_conn->addr.from;
1023 else
1024 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001025 break;
1026 case CO_SRC_TPROXY_DYN:
Willy Tarreaueee5b512015-04-03 23:46:31 +02001027 if (src->bind_hdr_occ && s->txn) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001028 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001029 size_t vlen;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001030 int rewind;
Willy Tarreau294c4732011-12-16 21:35:50 +01001031
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001032 /* bind to the IP in a header */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001033 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_family = AF_INET;
1034 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_port = 0;
1035 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr = 0;
Willy Tarreau294c4732011-12-16 21:35:50 +01001036
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001037 c_rew(&s->req, rewind = http_hdr_rewind(&s->txn->req));
Willy Tarreaueee5b512015-04-03 23:46:31 +02001038 if (http_get_hdr(&s->txn->req, src->bind_hdr_name, src->bind_hdr_len,
1039 &s->txn->hdr_idx, src->bind_hdr_occ, NULL, &vptr, &vlen)) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001040 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001041 htonl(inetaddr_host_lim(vptr, vptr + vlen));
Willy Tarreaubce70882009-09-07 11:51:47 +02001042 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001043 c_adv(&s->req, rewind);
Willy Tarreaub1d67742010-03-29 19:36:59 +02001044 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001045 break;
1046 default:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001047 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreaub1d67742010-03-29 19:36:59 +02001048 }
1049#endif
1050}
1051
Lukas Tribusda95fd92018-11-25 13:21:27 +01001052#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001053/*
1054 * Pick the right mux once the connection is established, we should now have
Willy Tarreau94031d32018-12-19 14:36:29 +01001055 * an alpn if available, so we are now able to choose. In this specific case
1056 * the connection's context is &si[i].end.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001057 */
1058static int conn_complete_server(struct connection *conn)
1059{
1060 struct conn_stream *cs = NULL;
Willy Tarreau94031d32018-12-19 14:36:29 +01001061 struct stream *s = container_of(conn->ctx, struct stream, si[1].end);
Olivier Houchardbf024f02018-11-29 17:08:53 +01001062 struct server *srv;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001063
Olivier Houchard70d9b2f2018-11-29 16:57:32 +01001064 task_wakeup(s->task, TASK_WOKEN_IO);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001065 conn_clear_xprt_done_cb(conn);
1066 /* Verify if the connection just established. */
1067 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED))))
1068 conn->flags |= CO_FL_CONNECTED;
1069
Olivier Houchard201b9f42018-11-21 00:16:29 +01001070 if (conn->flags & CO_FL_ERROR)
1071 goto fail;
Olivier Houchardd76bd2d2018-11-29 16:58:49 +01001072 si_detach_endpoint(&s->si[1]);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001073 cs = si_alloc_cs(&s->si[1], conn);
1074 if (!cs)
1075 goto fail;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001076 if (conn_install_mux_be(conn, cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001077 goto fail;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001078 srv = objt_server(s->target);
Olivier Houchard7aec9ed2018-12-14 19:31:51 +01001079 if (srv && ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
Olivier Houchardbf024f02018-11-29 17:08:53 +01001080 conn->mux->avail_streams(conn) > 0)
1081 LIST_ADD(&srv->idle_conns[tid], &conn->list);
1082
Olivier Houchard201b9f42018-11-21 00:16:29 +01001083 return 0;
1084
1085fail:
1086 if (cs)
1087 cs_free(cs);
1088 /* kill the connection now */
1089 conn_stop_tracking(conn);
1090 conn_full_close(conn);
1091 conn_free(conn);
1092 return -1;
1093}
Olivier Houchardc6e0bb42018-11-23 14:24:10 +01001094#endif
Olivier Houchard201b9f42018-11-21 00:16:29 +01001095
Willy Tarreaub1d67742010-03-29 19:36:59 +02001096
Willy Tarreaubaaee002006-06-26 02:48:02 +02001097/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001098 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001099 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001100 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001101 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001102 * - SF_ERR_NONE if everything's OK
1103 * - SF_ERR_SRVTO if there are no more servers
1104 * - SF_ERR_SRVCL if the connection was refused by the server
1105 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1106 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1107 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001108 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001109 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001110 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001111 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001112int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001113{
Olivier Houchard522eea72017-11-03 16:27:47 +01001114 struct connection *cli_conn = NULL;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001115 struct connection *srv_conn = NULL;
1116 struct connection *old_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001117 struct conn_stream *srv_cs = NULL;
Willy Tarreau827aee92011-03-10 16:55:02 +01001118 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001119 int reuse = 0;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001120 int reuse_orphan = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001121 int err;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001122 int i;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001123
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001124
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001125 /* Some, such as http_proxy and the LUA, create their connection and
1126 * conn_stream manually, so if we already have a conn_stream, try
1127 * to use it.
1128 */
1129 srv_cs = objt_cs(s->si[1].end);
1130 if (srv_cs) {
1131 old_conn = srv_conn = cs_conn(srv_cs);
Olivier Houchardbb3dac32018-12-24 13:32:13 +01001132 if (old_conn && (!old_conn->target || old_conn->target == s->target)) {
Olivier Houchardac1ce6f2018-12-08 19:08:48 +01001133 old_conn->flags &= ~(CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH);
Olivier Houchardab8b0752018-12-13 15:37:25 +01001134 srv_cs->flags &= ~(CS_FL_ERROR | CS_FL_EOS | CS_FL_REOS);
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001135 reuse = 1;
Olivier Houchardac1ce6f2018-12-08 19:08:48 +01001136 }
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001137 } else {
Olivier Houchard2442f682018-12-01 17:03:38 +01001138 for (i = 0; i < MAX_SRV_LIST; i++) {
1139 if (s->sess->srv_list[i].target == s->target) {
1140 list_for_each_entry(srv_conn, &s->sess->srv_list[i].list,
1141 session_list) {
1142 if (conn_xprt_ready(srv_conn) &&
1143 srv_conn->mux && (srv_conn->mux->avail_streams(srv_conn) > 0)) {
1144 reuse = 1;
1145 break;
1146 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001147 }
1148 }
1149 }
Olivier Houchard2442f682018-12-01 17:03:38 +01001150 if (!srv_conn) {
1151 for (i = 0; i < MAX_SRV_LIST; i++) {
1152 if (!LIST_ISEMPTY(&s->sess->srv_list[i].list)) {
1153 srv_conn = LIST_ELEM(&s->sess->srv_list[i].list,
1154 struct connection *, session_list);
1155 break;
1156 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001157 }
1158 }
1159 }
1160 old_conn = srv_conn;
1161
Willy Tarreau7b004922015-08-04 19:34:21 +02001162 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001163
Willy Tarreau8dff9982015-08-04 20:45:52 +02001164 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001165 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001166
Willy Tarreau449d74a2015-08-05 17:16:33 +02001167 /* Below we pick connections from the safe or idle lists based
1168 * on the strategy, the fact that this is a first or second
1169 * (retryable) request, with the indicated priority (1 or 2) :
1170 *
1171 * SAFE AGGR ALWS
1172 *
1173 * +-----+-----+ +-----+-----+ +-----+-----+
1174 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1175 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1176 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1177 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1178 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1179 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1180 */
Christopher Faulet40a007c2017-07-03 15:41:01 +02001181 if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001182 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1183 s->txn && (s->txn->flags & TX_NOT_FIRST))) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001184 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001185 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001186 else if (srv->safe_conns && !LIST_ISEMPTY(&srv->safe_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001187 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1188 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR)) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001189 srv_conn = LIST_ELEM(srv->safe_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001190 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001191 else if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001192 (s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001193 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001194 } else if (srv->idle_orphan_conns && !LIST_ISEMPTY(&srv->idle_orphan_conns[tid]) &&
1195 (((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) ||
1196 (((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
1197 s->txn && (s->txn->flags & TX_NOT_FIRST)))) {
1198 srv_conn = LIST_ELEM(srv->idle_orphan_conns[tid].n,
1199 struct connection *, list);
1200 reuse_orphan = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001201 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001202
Willy Tarreau449d74a2015-08-05 17:16:33 +02001203 /* If we've picked a connection from the pool, we now have to
1204 * detach it. We may have to get rid of the previous idle
1205 * connection we had, so for this we try to swap it with the
1206 * other owner's. That way it may remain alive for others to
1207 * pick.
1208 */
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001209 if (srv_conn)
Willy Tarreau8dff9982015-08-04 20:45:52 +02001210 reuse = 1;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001211 }
1212
Willy Tarreau34601a82013-12-15 16:33:46 +01001213 if (reuse) {
1214 /* Disable connection reuse if a dynamic source is used.
1215 * As long as we don't share connections between servers,
1216 * we don't need to disable connection reuse on no-idempotent
1217 * requests nor when PROXY protocol is used.
1218 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001219 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1220 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1221 reuse = 0;
1222 }
1223 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1224 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1225 reuse = 0;
1226 }
1227 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001228 /* If we're really reusing the connection, remove it from the orphan
1229 * list and add it back to the idle list.
1230 */
1231 if (reuse && reuse_orphan) {
1232 LIST_DEL(&srv_conn->list);
Olivier Houchard006e3102018-12-10 18:30:32 +01001233 srv_conn->idle_time = 0;
1234 srv->curr_idle_conns--;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001235 LIST_ADDQ(&srv->idle_conns[tid], &srv_conn->list);
1236 if (LIST_ISEMPTY(&srv->idle_orphan_conns[tid]))
1237 task_unlink_wq(srv->idle_task[tid]);
1238 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001239
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001240 /* We're about to use another connection, let the mux know we're
1241 * done with this one
1242 */
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001243 if (old_conn != srv_conn || !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001244
1245 if (srv_conn && reuse) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001246 struct session *sess = srv_conn->owner;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001247
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001248 if (sess) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001249 if (old_conn &&
1250 !(old_conn->flags & CO_FL_PRIVATE) &&
Olivier Houcharda49d41a2018-11-29 18:03:21 +01001251 old_conn->mux != NULL &&
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001252 (old_conn->mux->avail_streams(old_conn) > 0) &&
1253 (srv_conn->mux->avail_streams(srv_conn) == 1)) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001254 LIST_DEL(&old_conn->session_list);
1255 LIST_INIT(&old_conn->session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001256 old_conn->owner = sess;
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01001257 session_add_conn(sess, old_conn, s->target);
1258 session_check_idle_conn(sess, old_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001259 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001260 }
1261
1262 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001263 }
1264
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001265 if (!reuse) {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001266 srv_conn = conn_new();
1267 srv_cs = NULL;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001268 } else {
Olivier Houchard2442f682018-12-01 17:03:38 +01001269 /* We already created a cs earlier when using http_proxy, so
1270 * only create a new one if we don't have one already.
1271 */
1272 if (!srv_cs) {
1273 if (srv_conn->mux->avail_streams(srv_conn) == 1) {
1274 /* No more streams available, remove it from the list */
1275 LIST_DEL(&srv_conn->list);
1276 LIST_INIT(&srv_conn->list);
1277 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01001278 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
Olivier Houchard2442f682018-12-01 17:03:38 +01001279 if (srv_cs)
1280 si_attach_cs(&s->si[1], srv_cs);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001281 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001282 }
1283 if (srv_conn && old_conn != srv_conn) {
1284 srv_conn->owner = s->sess;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001285 LIST_DEL(&srv_conn->session_list);
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01001286 LIST_INIT(&srv_conn->session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001287 session_add_conn(s->sess, srv_conn, s->target);
Willy Tarreau323a2d92015-08-04 19:00:17 +02001288 }
Willy Tarreauc12b5e62015-08-04 19:45:36 +02001289
Olivier Houchard201b9f42018-11-21 00:16:29 +01001290 if (!srv_conn)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001291 return SF_ERR_RESOURCE;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001292
Willy Tarreaue7dff022015-04-03 01:14:29 +02001293 if (!(s->flags & SF_ADDR_SET)) {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001294 err = assign_server_address(s, srv_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001295 if (err != SRV_STATUS_OK)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001296 return SF_ERR_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001297 }
1298
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001299 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreau87b09662015-04-03 00:22:06 +02001300 /* the target was only on the stream, assign it to the SI now */
Willy Tarreauff605db2013-12-20 11:09:51 +01001301 srv_conn->target = s->target;
Willy Tarreaud88edf22009-06-14 15:48:17 +02001302
Willy Tarreauff605db2013-12-20 11:09:51 +01001303 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001304 if (srv)
Willy Tarreau7b004922015-08-04 19:34:21 +02001305 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001306 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1307 /* proxies exclusively run on raw_sock right now */
Willy Tarreaua261e9b2016-12-22 20:44:00 +01001308 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), xprt_get(XPRT_RAW));
Olivier Houchard12950162018-11-23 14:32:08 +01001309 if (!(srv_conn->ctrl))
Willy Tarreaue7dff022015-04-03 01:14:29 +02001310 return SF_ERR_INTERNAL;
Willy Tarreauff605db2013-12-20 11:09:51 +01001311 }
1312 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001313 return SF_ERR_INTERNAL; /* how did we get there ? */
Willy Tarreaud02394b2012-05-11 18:32:18 +02001314
Lukas Tribusda95fd92018-11-25 13:21:27 +01001315#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001316 if (!srv ||
1317 ((!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
1318 srv->mux_proto))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001319#endif
1320 {
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001321 srv_cs = objt_cs(s->si[1].end);
1322 if (!srv_cs || srv_cs->conn != srv_conn)
1323 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001324 if (!srv_cs) {
1325 conn_free(srv_conn);
1326 return SF_ERR_RESOURCE;
1327 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01001328 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001329 return SF_ERR_INTERNAL;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001330 /* If we're doing http-reuse always, and the connection
1331 * is an http2 connection, add it to the available list,
1332 * so that others can use it right away.
1333 */
1334 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1335 srv_conn->mux->avail_streams(srv_conn) > 0)
1336 LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001337 }
Lukas Tribusda95fd92018-11-25 13:21:27 +01001338#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001339 else {
Willy Tarreau94031d32018-12-19 14:36:29 +01001340 srv_conn->ctx = &s->si[1].end;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001341 /* Store the connection into the stream interface,
1342 * while we still don't have a mux, so that if the
1343 * stream is destroyed before the connection is
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001344 * established, we have a chance to destroy it even
1345 * if it is no longer referenced in the session.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001346 */
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001347 s->si[1].end = &srv_conn->obj_type;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001348 conn_set_xprt_done_cb(srv_conn, conn_complete_server);
1349 }
1350
1351#endif
1352
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001353
Willy Tarreauff605db2013-12-20 11:09:51 +01001354 /* process the case where the server requires the PROXY protocol to be sent */
1355 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001356 cli_conn = objt_conn(strm_orig(s));
1357
Willy Tarreau7b004922015-08-04 19:34:21 +02001358 if (srv && srv->pp_opts) {
Willy Tarreau387ebf82015-08-04 19:24:13 +02001359 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreauff605db2013-12-20 11:09:51 +01001360 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001361 if (cli_conn)
1362 conn_get_to_addr(cli_conn);
1363 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001364
Willy Tarreauff605db2013-12-20 11:09:51 +01001365 assign_tproxy_address(s);
1366 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001367 else if (!conn_xprt_ready(srv_conn)) {
1368 if (srv_conn->mux->reset)
1369 srv_conn->mux->reset(srv_conn);
1370 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001371 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001372 s->flags |= SF_SRV_REUSED;
Willy Tarreaub1d67742010-03-29 19:36:59 +02001373
William Lallemandb7ff6a32012-03-02 14:35:21 +01001374 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001375 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001376 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001377
Willy Tarreau14f8e862012-08-30 22:23:13 +02001378 /* disable lingering */
1379 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001380 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001381
Willy Tarreauf1573842018-12-14 11:35:36 +01001382 if (s->flags & SF_SRV_REUSED) {
1383 HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001384 if (srv)
1385 HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001386 } else {
1387 HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001388 if (srv)
1389 HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001390 }
1391
Olivier Houchard201b9f42018-11-21 00:16:29 +01001392 err = si_connect(&s->si[1], srv_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001393
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001394#ifdef USE_OPENSSL
Olivier Houchard522eea72017-11-03 16:27:47 +01001395 if (!reuse && cli_conn && srv &&
1396 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
1397 (cli_conn->flags & CO_FL_EARLY_DATA) &&
1398 !channel_is_empty(si_oc(&s->si[1])) &&
1399 srv_conn->flags & CO_FL_SSL_WAIT_HS) {
1400 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
1401 srv_conn->flags |= CO_FL_EARLY_SSL_HS;
1402 }
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001403#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001404
Willy Tarreaue7dff022015-04-03 01:14:29 +02001405 if (err != SF_ERR_NONE)
Willy Tarreau9650f372009-08-16 14:02:45 +02001406 return err;
Willy Tarreau788e2842008-08-26 13:25:39 +02001407
Willy Tarreau14f8e862012-08-30 22:23:13 +02001408 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001409 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001410
Willy Tarreau827aee92011-03-10 16:55:02 +01001411 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001412 int count;
1413
Willy Tarreaue7dff022015-04-03 01:14:29 +02001414 s->flags |= SF_CURR_SESS;
Christopher Faulet29f77e82017-06-08 14:04:45 +02001415 count = HA_ATOMIC_ADD(&srv->cur_sess, 1);
1416 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001417 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001418 s->be->lbprm.server_take_conn(srv);
Willy Tarreau732eac42015-07-09 11:40:25 +02001419
1420#ifdef USE_OPENSSL
1421 if (srv->ssl_ctx.sni) {
1422 struct sample *smp;
1423 int rewind;
1424
1425 /* Tricky case : we have already scheduled the pending
1426 * HTTP request or TCP data for leaving. So in HTTP we
1427 * rewind exactly the headers, otherwise we rewind the
1428 * output data.
1429 */
Willy Tarreau6a445eb2018-06-19 07:04:45 +02001430 rewind = s->txn ? http_hdr_rewind(&s->txn->req) : co_data(&s->req);
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001431 c_rew(&s->req, rewind);
Willy Tarreau732eac42015-07-09 11:40:25 +02001432
1433 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL, srv->ssl_ctx.sni, SMP_T_STR);
1434
1435 /* restore the pointers */
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001436 c_adv(&s->req, rewind);
Willy Tarreau732eac42015-07-09 11:40:25 +02001437
Willy Tarreau2e0565c2016-08-09 11:55:21 +02001438 if (smp_make_safe(smp)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001439 ssl_sock_set_servername(srv_conn,
1440 smp->data.u.str.area);
Willy Tarreau387ebf82015-08-04 19:24:13 +02001441 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreau732eac42015-07-09 11:40:25 +02001442 }
1443 }
1444#endif /* USE_OPENSSL */
1445
Willy Tarreaubaaee002006-06-26 02:48:02 +02001446 }
1447
Willy Tarreaue7dff022015-04-03 01:14:29 +02001448 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001449}
1450
1451
Willy Tarreaubaaee002006-06-26 02:48:02 +02001452/* This function performs the "redispatch" part of a connection attempt. It
1453 * will assign a server if required, queue the connection if required, and
1454 * handle errors that might arise at this level. It can change the server
1455 * state. It will return 1 if it encounters an error, switches the server
1456 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1457 * that the connection is ready to use.
1458 */
1459
Willy Tarreau87b09662015-04-03 00:22:06 +02001460int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001461{
Willy Tarreau827aee92011-03-10 16:55:02 +01001462 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001463 int conn_err;
1464
1465 /* We know that we don't have any connection pending, so we will
1466 * try to get a new one, and wait in this state if it's queued
1467 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001468 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001469 conn_err = assign_server_and_queue(s);
1470 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001471
Willy Tarreaubaaee002006-06-26 02:48:02 +02001472 switch (conn_err) {
1473 case SRV_STATUS_OK:
1474 break;
1475
Willy Tarreau7c669d72008-06-20 15:04:11 +02001476 case SRV_STATUS_FULL:
1477 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1478 * and we can redispatch to another server, or it is not and we return
1479 * 503. This only makes sense in DIRECT mode however, because normal LB
1480 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001481 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001482 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001483 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001484 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001485 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001486 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001487 goto redispatch;
1488 }
1489
Willy Tarreau350f4872014-11-28 14:42:25 +01001490 if (!s->si[1].err_type) {
1491 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001492 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001493
Christopher Faulet29f77e82017-06-08 14:04:45 +02001494 HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001495 HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001496 return 1;
1497
Willy Tarreaubaaee002006-06-26 02:48:02 +02001498 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001499 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001500 if (!s->si[1].err_type) {
1501 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001502 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001503
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001504 HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001505 return 1;
1506
1507 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001508 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1509 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001510 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001511 return 1;
1512
Willy Tarreaubaaee002006-06-26 02:48:02 +02001513 case SRV_STATUS_INTERNAL:
1514 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001515 if (!s->si[1].err_type) {
1516 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001517 }
1518
Willy Tarreau827aee92011-03-10 16:55:02 +01001519 if (srv)
1520 srv_inc_sess_ctr(srv);
1521 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001522 srv_set_sess_last(srv);
1523 if (srv)
Christopher Faulet29f77e82017-06-08 14:04:45 +02001524 HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001525 HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001526
Willy Tarreau87b09662015-04-03 00:22:06 +02001527 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001528 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001529 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001530 return 1;
1531 }
1532 /* if we get here, it's because we got SRV_STATUS_OK, which also
1533 * means that the connection has not been queued.
1534 */
1535 return 0;
1536}
1537
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001538/* sends a log message when a backend goes down, and also sets last
1539 * change date.
1540 */
1541void set_backend_down(struct proxy *be)
1542{
1543 be->last_change = now.tv_sec;
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001544 HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001545
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001546 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001547 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001548 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
1549 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001550}
1551
Willy Tarreau87b09662015-04-03 00:22:06 +02001552/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001553 * tries to extract an RDP cookie from the request buffer, and look for the
1554 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02001555 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001556 * list. Nothing is performed if a server was already assigned.
1557 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001558int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001559{
1560 struct proxy *px = s->be;
1561 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02001562 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001563 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01001564 uint16_t port;
1565 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001566 char *p;
1567
Christopher Faulet45073512018-07-20 10:16:29 +02001568 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001569 now_ms, __FUNCTION__,
1570 s,
1571 req,
1572 req->rex, req->wex,
1573 req->flags,
Christopher Faulet45073512018-07-20 10:16:29 +02001574 ci_data(req),
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001575 req->analysers);
1576
Willy Tarreaue7dff022015-04-03 01:14:29 +02001577 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001578 goto no_cookie;
1579
Willy Tarreau37406352012-04-23 16:16:37 +02001580 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001581
Willy Tarreaucadd8c92013-07-22 18:09:52 +02001582 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001583 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001584 goto no_cookie;
1585
Willy Tarreau04276f32017-01-06 17:41:29 +01001586 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
1587 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
1588 * server's IP address in network order, and "port" is the integer corresponding to the
1589 * server's port in network order. Comments please Emeric.
1590 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001591 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001592 if (*p != '.')
1593 goto no_cookie;
1594 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01001595
1596 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001597 if (*p != '.')
1598 goto no_cookie;
1599
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001600 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001601 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02001602 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01001603 port == srv->svc_port &&
1604 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001605 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001606 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001607 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001608 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001609 break;
1610 }
1611 }
1612 srv = srv->next;
1613 }
1614
1615no_cookie:
1616 req->analysers &= ~an_bit;
1617 req->analyse_exp = TICK_ETERNITY;
1618 return 1;
1619}
1620
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001621int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01001622 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001623 return px->down_time;
1624
1625 return now.tv_sec - px->last_change + px->down_time;
1626}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001627
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001628/*
1629 * This function returns a string containing the balancing
1630 * mode of the proxy in a format suitable for stats.
1631 */
1632
1633const char *backend_lb_algo_str(int algo) {
1634
1635 if (algo == BE_LB_ALGO_RR)
1636 return "roundrobin";
1637 else if (algo == BE_LB_ALGO_SRR)
1638 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01001639 else if (algo == BE_LB_ALGO_FAS)
1640 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001641 else if (algo == BE_LB_ALGO_LC)
1642 return "leastconn";
1643 else if (algo == BE_LB_ALGO_SH)
1644 return "source";
1645 else if (algo == BE_LB_ALGO_UH)
1646 return "uri";
1647 else if (algo == BE_LB_ALGO_PH)
1648 return "url_param";
1649 else if (algo == BE_LB_ALGO_HH)
1650 return "hdr";
1651 else if (algo == BE_LB_ALGO_RCH)
1652 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001653 else if (algo == BE_LB_ALGO_NONE)
1654 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001655 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001656 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001657}
1658
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001659/* This function parses a "balance" statement in a backend section describing
1660 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001661 * returns -1, it will write an error message into the <err> buffer which will
1662 * automatically be allocated and must be passed as NULL. The trailing '\n'
1663 * will not be written. The function must be called with <args> pointing to the
1664 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001665 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001666int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001667{
1668 if (!*(args[0])) {
1669 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01001670 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1671 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001672 return 0;
1673 }
1674
1675 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001676 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1677 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001678 }
Willy Tarreau9757a382009-10-03 12:56:50 +02001679 else if (!strcmp(args[0], "static-rr")) {
1680 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1681 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
1682 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01001683 else if (!strcmp(args[0], "first")) {
1684 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1685 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
1686 }
Willy Tarreau51406232008-03-10 22:04:20 +01001687 else if (!strcmp(args[0], "leastconn")) {
1688 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1689 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
1690 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02001691 else if (!strcmp(args[0], "random")) {
1692 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1693 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
1694 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001695 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001696 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1697 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001698 }
1699 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001700 int arg = 1;
1701
Willy Tarreau31682232007-11-29 15:38:04 +01001702 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1703 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001704
Oskar Stolc8dc41842012-05-19 10:19:54 +01001705 curproxy->uri_whole = 0;
1706
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001707 while (*args[arg]) {
1708 if (!strcmp(args[arg], "len")) {
1709 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001710 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001711 return -1;
1712 }
1713 curproxy->uri_len_limit = atoi(args[arg+1]);
1714 arg += 2;
1715 }
1716 else if (!strcmp(args[arg], "depth")) {
1717 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001718 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001719 return -1;
1720 }
1721 /* hint: we store the position of the ending '/' (depth+1) so
1722 * that we avoid a comparison while computing the hash.
1723 */
1724 curproxy->uri_dirs_depth1 = atoi(args[arg+1]) + 1;
1725 arg += 2;
1726 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01001727 else if (!strcmp(args[arg], "whole")) {
1728 curproxy->uri_whole = 1;
1729 arg += 1;
1730 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001731 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01001732 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001733 return -1;
1734 }
1735 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001736 }
Willy Tarreau01732802007-11-01 22:48:15 +01001737 else if (!strcmp(args[0], "url_param")) {
1738 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001739 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01001740 return -1;
1741 }
Willy Tarreau31682232007-11-29 15:38:04 +01001742 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1743 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02001744
1745 free(curproxy->url_param_name);
Willy Tarreau01732802007-11-01 22:48:15 +01001746 curproxy->url_param_name = strdup(args[1]);
Willy Tarreaua534fea2008-08-03 12:19:50 +02001747 curproxy->url_param_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001748 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001749 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001750 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001751 return -1;
1752 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001753 }
Benoitaffb4812009-03-25 13:02:10 +01001754 }
1755 else if (!strncmp(args[0], "hdr(", 4)) {
1756 const char *beg, *end;
1757
1758 beg = args[0] + 4;
1759 end = strchr(beg, ')');
1760
1761 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001762 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01001763 return -1;
1764 }
1765
1766 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1767 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
1768
1769 free(curproxy->hh_name);
1770 curproxy->hh_len = end - beg;
1771 curproxy->hh_name = my_strndup(beg, end - beg);
1772 curproxy->hh_match_domain = 0;
1773
1774 if (*args[1]) {
1775 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001776 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01001777 return -1;
1778 }
1779 curproxy->hh_match_domain = 1;
1780 }
Emeric Brun736aa232009-06-30 17:56:00 +02001781 }
1782 else if (!strncmp(args[0], "rdp-cookie", 10)) {
1783 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1784 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
1785
1786 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
1787 const char *beg, *end;
1788
1789 beg = args[0] + 11;
1790 end = strchr(beg, ')');
1791
1792 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001793 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001794 return -1;
1795 }
1796
1797 free(curproxy->hh_name);
1798 curproxy->hh_name = my_strndup(beg, end - beg);
1799 curproxy->hh_len = end - beg;
1800 }
1801 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
1802 free(curproxy->hh_name);
1803 curproxy->hh_name = strdup("mstshash");
1804 curproxy->hh_len = strlen(curproxy->hh_name);
1805 }
1806 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001807 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001808 return -1;
1809 }
Willy Tarreau01732802007-11-01 22:48:15 +01001810 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001811 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001812 memprintf(err, "only supports 'roundrobin', 'static-rr', 'leastconn', 'source', 'uri', 'url_param', 'hdr(name)' and 'rdp-cookie(name)' options.");
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001813 return -1;
1814 }
1815 return 0;
1816}
1817
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001818
1819/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01001820/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001821/************************************************************************/
1822
Willy Tarreau34db1082012-04-19 17:16:54 +02001823/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001824 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001825 * undefined behaviour.
1826 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001827static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001828smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001829{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001830 struct proxy *px;
1831
Willy Tarreau37406352012-04-23 16:16:37 +02001832 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001833 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02001834 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001835
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01001836 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001837
1838 return 1;
1839}
1840
Willy Tarreau37406352012-04-23 16:16:37 +02001841/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001842 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02001843 * Accepts exactly 1 argument. Argument is a server, other types will lead to
1844 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001845 */
1846static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001847smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001848{
Willy Tarreau24e32d82012-04-23 23:55:44 +02001849 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001850
Willy Tarreau37406352012-04-23 16:16:37 +02001851 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001852 smp->data.type = SMP_T_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02001853 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
1854 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001855 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001856 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001857 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001858 return 1;
1859}
1860
Willy Tarreau34db1082012-04-19 17:16:54 +02001861/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001862 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001863 * undefined behaviour.
1864 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001865static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001866smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001867{
1868 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02001869
Willy Tarreau37406352012-04-23 16:16:37 +02001870 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001871 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001872 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001873
Willy Tarreau24e32d82012-04-23 23:55:44 +02001874 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001875 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001876 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001877
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001878 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01001879 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001880 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001881 return 1;
1882 }
1883
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001884 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02001885 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001886 }
1887
1888 return 1;
1889}
1890
Willy Tarreaua5e37562011-12-16 17:06:15 +01001891/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01001892static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001893smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02001894{
Willy Tarreaube508f12016-03-10 11:47:01 +01001895 if (!smp->strm)
1896 return 0;
1897
Willy Tarreauf853c462012-04-23 18:53:56 +02001898 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001899 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001900 smp->data.u.sint = smp->strm->be->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01001901 return 1;
1902}
1903
Marcin Deranekd2471c22016-12-12 14:08:05 +01001904/* set string to the name of the backend */
1905static int
1906smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
1907{
1908 if (!smp->strm)
1909 return 0;
1910
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001911 smp->data.u.str.area = (char *)smp->strm->be->id;
1912 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01001913 return 0;
1914
1915 smp->data.type = SMP_T_STR;
1916 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001917 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01001918
1919 return 1;
1920}
1921
Willy Tarreaua5e37562011-12-16 17:06:15 +01001922/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01001923static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001924smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02001925{
Willy Tarreaube508f12016-03-10 11:47:01 +01001926 if (!smp->strm)
1927 return 0;
1928
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001929 if (!objt_server(smp->strm->target))
Willy Tarreau17af4192011-02-23 14:27:06 +01001930 return 0;
1931
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001932 smp->data.type = SMP_T_SINT;
Willy Tarreau1e582e52018-09-20 11:29:28 +02001933 smp->data.u.sint = __objt_server(smp->strm->target)->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01001934
1935 return 1;
1936}
1937
Willy Tarreau34db1082012-04-19 17:16:54 +02001938/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001939 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001940 * undefined behaviour.
1941 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01001942static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001943smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01001944{
Willy Tarreau37406352012-04-23 16:16:37 +02001945 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001946 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001947 smp->data.u.sint = read_freq_ctr(&args->data.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01001948 return 1;
1949}
1950
Willy Tarreau34db1082012-04-19 17:16:54 +02001951/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001952 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001953 * undefined behaviour.
1954 */
Willy Tarreaua36af912009-10-10 12:02:45 +02001955static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001956smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02001957{
Willy Tarreau37406352012-04-23 16:16:37 +02001958 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001959 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001960 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02001961 return 1;
1962}
1963
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04001964/* set temp integer to the number of available connections across available
1965 * servers on the backend.
1966 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
1967 * undefined behaviour.
1968 */
1969static int
1970smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
1971{
1972 struct server *iterator;
1973 struct proxy *px;
1974 unsigned int maxconn;
1975
1976 smp->flags = SMP_F_VOL_TEST;
1977 smp->data.type = SMP_T_SINT;
1978 smp->data.u.sint = 0;
1979
1980 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
1981 if (iterator->cur_state == SRV_ST_STOPPED)
1982 continue;
1983
1984 px = iterator->proxy;
1985 if (!srv_currently_usable(iterator) ||
1986 ((iterator->flags & SRV_F_BACKUP) &&
1987 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
1988 continue;
1989
1990 if (iterator->maxconn == 0) {
1991 /* one active server is unlimited, return -1 */
1992 smp->data.u.sint = -1;
1993 return 1;
1994 }
1995
1996 maxconn = srv_dynamic_maxconn(iterator);
1997 if (maxconn > iterator->cur_sess)
1998 smp->data.u.sint += maxconn - iterator->cur_sess;
1999 }
2000
2001 return 1;
2002}
2003
Willy Tarreau34db1082012-04-19 17:16:54 +02002004/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002005 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002006 * undefined behaviour.
2007 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002008static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002009smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002010{
Willy Tarreau37406352012-04-23 16:16:37 +02002011 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002012 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002013 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002014 return 1;
2015}
2016
Willy Tarreaua5e37562011-12-16 17:06:15 +01002017/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002018 * by the number of running servers and rounded up. If there is no running
2019 * server, we return twice the total, just as if we had half a running server.
2020 * This is more or less correct anyway, since we expect the last server to come
2021 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002022 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002023 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002024 */
2025static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002026smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002027{
2028 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002029 struct proxy *px;
Willy Tarreaua36af912009-10-10 12:02:45 +02002030
Willy Tarreau37406352012-04-23 16:16:37 +02002031 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002032 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002033 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002034
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002035 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002036
2037 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002038 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002039 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002040 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002041
2042 return 1;
2043}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002044
Willy Tarreau34db1082012-04-19 17:16:54 +02002045/* set temp integer to the number of concurrent connections on the server in the backend.
2046 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2047 * undefined behaviour.
2048 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002049static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002050smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002051{
Willy Tarreauf853c462012-04-23 18:53:56 +02002052 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002053 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002054 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002055 return 1;
2056}
2057
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002058/* set temp integer to the number of available connections on the server in the backend.
2059 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2060 * undefined behaviour.
2061 */
2062static int
2063smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2064{
2065 unsigned int maxconn;
2066
2067 smp->flags = SMP_F_VOL_TEST;
2068 smp->data.type = SMP_T_SINT;
2069
2070 if (args->data.srv->maxconn == 0) {
2071 /* one active server is unlimited, return -1 */
2072 smp->data.u.sint = -1;
2073 return 1;
2074 }
2075
2076 maxconn = srv_dynamic_maxconn(args->data.srv);
2077 if (maxconn > args->data.srv->cur_sess)
2078 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2079 else
2080 smp->data.u.sint = 0;
2081
2082 return 1;
2083}
2084
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002085/* set temp integer to the number of connections pending in the server's queue.
2086 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2087 * undefined behaviour.
2088 */
2089static int
2090smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2091{
2092 smp->flags = SMP_F_VOL_TEST;
2093 smp->data.type = SMP_T_SINT;
2094 smp->data.u.sint = args->data.srv->nbpend;
2095 return 1;
2096}
2097
Tait Clarridge7896d522012-12-05 21:39:31 -05002098/* set temp integer to the number of enabled servers on the proxy.
2099 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2100 * undefined behaviour.
2101 */
2102static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002103smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002104{
2105 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002106 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002107 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002108 return 1;
2109}
2110
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002111static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2112{
2113
2114 struct proxy *px;
2115
2116 if (!smp_make_safe(smp))
2117 return 0;
2118
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002119 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002120 if (!px)
2121 return 0;
2122
2123 smp->data.type = SMP_T_SINT;
2124 smp->data.u.sint = be_usable_srv(px);
2125
2126 return 1;
2127}
2128
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002129
2130/* Note: must not be declared <const> as its list will be overwritten.
2131 * Please take care of keeping this list alphabetically sorted.
2132 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002133static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002134 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2135 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002136 { "be_conn_free", smp_fetch_be_conn_free, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002137 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002138 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002139 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2140 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2141 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2142 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2143 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002144 { "srv_conn_free", smp_fetch_srv_conn_free, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002145 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002146 { "srv_is_up", smp_fetch_srv_is_up, ARG1(1,SRV), NULL, SMP_T_BOOL, SMP_USE_INTRN, },
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002147 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002148 { "srv_sess_rate", smp_fetch_srv_sess_rate, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002149 { /* END */ },
2150}};
2151
Willy Tarreau0108d902018-11-25 19:14:37 +01002152INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2153
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002154/* Note: must not be declared <const> as its list will be overwritten */
2155static struct sample_conv_kw_list sample_conv_kws = {ILH, {
2156 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2157 { /* END */ },
2158}};
2159
Willy Tarreau0108d902018-11-25 19:14:37 +01002160INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002161
Willy Tarreau61612d42012-04-19 18:42:05 +02002162/* Note: must not be declared <const> as its list will be overwritten.
2163 * Please take care of keeping this list alphabetically sorted.
2164 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002165static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002166 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002167}};
2168
Willy Tarreau0108d902018-11-25 19:14:37 +01002169INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002170
Willy Tarreaubaaee002006-06-26 02:48:02 +02002171/*
2172 * Local variables:
2173 * c-indent-level: 8
2174 * c-basic-offset: 8
2175 * End:
2176 */