blob: 917b612b48324622787c45e8e90165f15ecdb50a [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>
Christopher Fauletf7679ad2019-02-04 12:02:18 +010027#include <common/htx.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010028#include <common/initcall.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +020029#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020030#include <common/time.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010031#include <common/namespace.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020032
Willy Tarreaubaaee002006-06-26 02:48:02 +020033#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020034
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +010035#include <proto/acl.h>
Willy Tarreau34db1082012-04-19 17:16:54 +020036#include <proto/arg.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020037#include <proto/backend.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020038#include <proto/channel.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +020039#include <proto/frontend.h>
Christopher Fauletf7679ad2019-02-04 12:02:18 +010040#include <proto/http_htx.h>
Willy Tarreau6b2e11b2009-10-01 07:52:15 +020041#include <proto/lb_chash.h>
Willy Tarreauf09c6602012-02-13 17:12:08 +010042#include <proto/lb_fas.h>
Willy Tarreauf89c1872009-10-01 11:19:37 +020043#include <proto/lb_fwlc.h>
44#include <proto/lb_fwrr.h>
45#include <proto/lb_map.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020046#include <proto/log.h>
Willy Tarreau53a47662017-08-28 10:53:00 +020047#include <proto/mux_pt.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010048#include <proto/obj_type.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010049#include <proto/payload.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020050#include <proto/protocol.h>
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020051#include <proto/http_ana.h>
Willy Tarreaua8f55d52010-05-31 17:44:19 +020052#include <proto/proto_tcp.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020053#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020054#include <proto/queue.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010055#include <proto/sample.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +010056#include <proto/server.h>
Olivier Houchard00cf70f2018-11-30 17:24:55 +010057#include <proto/session.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020058#include <proto/stream.h>
Willy Tarreau9e000c62011-03-10 14:03:36 +010059#include <proto/stream_interface.h>
Willy Tarreau732eac42015-07-09 11:40:25 +020060#include <proto/ssl_sock.h>
Willy Tarreauc125cef2019-05-10 09:58:43 +020061#include <proto/task.h>
Willy Tarreau732eac42015-07-09 11:40:25 +020062
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050063int be_lastsession(const struct proxy *be)
64{
65 if (be->be_counters.last_sess)
66 return now.tv_sec - be->be_counters.last_sess;
67
68 return -1;
69}
70
Bhaskar98634f02013-10-29 23:30:51 -040071/* helper function to invoke the correct hash method */
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070072static unsigned int gen_hash(const struct proxy* px, const char* key, unsigned long len)
Bhaskar98634f02013-10-29 23:30:51 -040073{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070074 unsigned int hash;
Bhaskar98634f02013-10-29 23:30:51 -040075
76 switch (px->lbprm.algo & BE_LB_HASH_FUNC) {
77 case BE_LB_HFCN_DJB2:
78 hash = hash_djb2(key, len);
79 break;
Willy Tarreaua0f42712013-11-14 14:30:35 +010080 case BE_LB_HFCN_WT6:
81 hash = hash_wt6(key, len);
82 break;
Willy Tarreau324f07f2015-01-20 19:44:50 +010083 case BE_LB_HFCN_CRC32:
84 hash = hash_crc32(key, len);
85 break;
Bhaskar98634f02013-10-29 23:30:51 -040086 case BE_LB_HFCN_SDBM:
87 /* this is the default hash function */
88 default:
89 hash = hash_sdbm(key, len);
90 break;
91 }
92
93 return hash;
94}
95
Willy Tarreaubaaee002006-06-26 02:48:02 +020096/*
97 * This function recounts the number of usable active and backup servers for
98 * proxy <p>. These numbers are returned into the p->srv_act and p->srv_bck.
Willy Tarreaub625a082007-11-26 01:15:43 +010099 * This function also recomputes the total active and backup weights. However,
Willy Tarreauf4cca452008-03-08 21:42:54 +0100100 * it does not update tot_weight nor tot_used. Use update_backend_weight() for
Willy Tarreaub625a082007-11-26 01:15:43 +0100101 * this.
Emeric Brun52a91d32017-08-31 14:41:55 +0200102 * This functions is designed to be called before server's weight and state
103 * commit so it uses 'next' weight and states values.
Christopher Faulet5b517552017-06-09 14:17:53 +0200104 *
105 * threads: this is the caller responsibility to lock data. For now, this
106 * function is called from lb modules, so it should be ok. But if you need to
107 * call it from another place, be careful (and update this comment).
Willy Tarreaubaaee002006-06-26 02:48:02 +0200108 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200109void recount_servers(struct proxy *px)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200110{
111 struct server *srv;
112
Willy Tarreau20697042007-11-15 23:26:18 +0100113 px->srv_act = px->srv_bck = 0;
114 px->lbprm.tot_wact = px->lbprm.tot_wbck = 0;
Willy Tarreaub625a082007-11-26 01:15:43 +0100115 px->lbprm.fbck = NULL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200116 for (srv = px->srv; srv != NULL; srv = srv->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +0200117 if (!srv_willbe_usable(srv))
Willy Tarreaub625a082007-11-26 01:15:43 +0100118 continue;
119
Willy Tarreauc93cd162014-05-13 15:54:22 +0200120 if (srv->flags & SRV_F_BACKUP) {
Willy Tarreaub625a082007-11-26 01:15:43 +0100121 if (!px->srv_bck &&
Willy Tarreauf4cca452008-03-08 21:42:54 +0100122 !(px->options & PR_O_USE_ALL_BK))
Willy Tarreaub625a082007-11-26 01:15:43 +0100123 px->lbprm.fbck = srv;
124 px->srv_bck++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400125 srv->cumulative_weight = px->lbprm.tot_wbck;
Emeric Brun52a91d32017-08-31 14:41:55 +0200126 px->lbprm.tot_wbck += srv->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100127 } else {
128 px->srv_act++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400129 srv->cumulative_weight = px->lbprm.tot_wact;
Emeric Brun52a91d32017-08-31 14:41:55 +0200130 px->lbprm.tot_wact += srv->next_eweight;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200131 }
132 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100133}
Willy Tarreau20697042007-11-15 23:26:18 +0100134
Willy Tarreaub625a082007-11-26 01:15:43 +0100135/* This function simply updates the backend's tot_weight and tot_used values
136 * after servers weights have been updated. It is designed to be used after
137 * recount_servers() or equivalent.
Christopher Faulet5b517552017-06-09 14:17:53 +0200138 *
139 * threads: this is the caller responsibility to lock data. For now, this
140 * function is called from lb modules, so it should be ok. But if you need to
141 * call it from another place, be careful (and update this comment).
Willy Tarreaub625a082007-11-26 01:15:43 +0100142 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200143void update_backend_weight(struct proxy *px)
Willy Tarreaub625a082007-11-26 01:15:43 +0100144{
Willy Tarreau20697042007-11-15 23:26:18 +0100145 if (px->srv_act) {
146 px->lbprm.tot_weight = px->lbprm.tot_wact;
147 px->lbprm.tot_used = px->srv_act;
148 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100149 else if (px->lbprm.fbck) {
150 /* use only the first backup server */
Emeric Brun52a91d32017-08-31 14:41:55 +0200151 px->lbprm.tot_weight = px->lbprm.fbck->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100152 px->lbprm.tot_used = 1;
Willy Tarreau20697042007-11-15 23:26:18 +0100153 }
154 else {
Willy Tarreaub625a082007-11-26 01:15:43 +0100155 px->lbprm.tot_weight = px->lbprm.tot_wbck;
156 px->lbprm.tot_used = px->srv_bck;
Willy Tarreau20697042007-11-15 23:26:18 +0100157 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100158}
159
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200160/*
161 * This function tries to find a running server for the proxy <px> following
162 * the source hash method. Depending on the number of active/backup servers,
163 * it will either look for active servers, or for backup servers.
164 * If any server is found, it will be returned. If no valid server is found,
165 * NULL is returned.
166 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100167static struct server *get_server_sh(struct proxy *px, const char *addr, int len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200168{
169 unsigned int h, l;
170
171 if (px->lbprm.tot_weight == 0)
172 return NULL;
173
174 l = h = 0;
175
176 /* note: we won't hash if there's only one server left */
177 if (px->lbprm.tot_used == 1)
178 goto hash_done;
179
180 while ((l + sizeof (int)) <= len) {
181 h ^= ntohl(*(unsigned int *)(&addr[l]));
182 l += sizeof (int);
183 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500184 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100185 h = full_hash(h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200186 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100187 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100188 return chash_get_server_hash(px, h, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200189 else
190 return map_get_server_hash(px, h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200191}
192
193/*
194 * This function tries to find a running server for the proxy <px> following
195 * the URI hash method. In order to optimize cache hits, the hash computation
196 * ends at the question mark. Depending on the number of active/backup servers,
197 * it will either look for active servers, or for backup servers.
198 * If any server is found, it will be returned. If no valid server is found,
Willy Tarreaua9a72492019-01-14 16:14:15 +0100199 * NULL is returned. The lbprm.arg_opt{1,2,3} values correspond respectively to
200 * the "whole" optional argument (boolean), the "len" argument (numeric) and
201 * the "depth" argument (numeric).
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200202 *
203 * This code was contributed by Guillaume Dallaire, who also selected this hash
204 * algorithm out of a tens because it gave him the best results.
205 *
206 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100207static struct server *get_server_uh(struct proxy *px, char *uri, int uri_len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200208{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700209 unsigned int hash = 0;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200210 int c;
211 int slashes = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400212 const char *start, *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200213
214 if (px->lbprm.tot_weight == 0)
215 return NULL;
216
217 /* note: we won't hash if there's only one server left */
218 if (px->lbprm.tot_used == 1)
219 goto hash_done;
220
Willy Tarreaua9a72492019-01-14 16:14:15 +0100221 if (px->lbprm.arg_opt2) // "len"
222 uri_len = MIN(uri_len, px->lbprm.arg_opt2);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200223
Bhaskar98634f02013-10-29 23:30:51 -0400224 start = end = uri;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200225 while (uri_len--) {
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200226 c = *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200227 if (c == '/') {
228 slashes++;
Willy Tarreaua9a72492019-01-14 16:14:15 +0100229 if (slashes == px->lbprm.arg_opt3) /* depth+1 */
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200230 break;
231 }
Willy Tarreaua9a72492019-01-14 16:14:15 +0100232 else if (c == '?' && !px->lbprm.arg_opt1) // "whole"
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200233 break;
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200234 end++;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200235 }
Bhaskar98634f02013-10-29 23:30:51 -0400236
237 hash = gen_hash(px, start, (end - start));
238
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500239 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100240 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200241 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100242 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100243 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200244 else
245 return map_get_server_hash(px, hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200246}
247
Christopher Faulet5b517552017-06-09 14:17:53 +0200248/*
Willy Tarreau01732802007-11-01 22:48:15 +0100249 * This function tries to find a running server for the proxy <px> following
250 * the URL parameter hash method. It looks for a specific parameter in the
251 * URL and hashes it to compute the server ID. This is useful to optimize
252 * performance by avoiding bounces between servers in contexts where sessions
253 * are shared but cookies are not usable. If the parameter is not found, NULL
254 * is returned. If any server is found, it will be returned. If no valid server
255 * is found, NULL is returned.
Willy Tarreau01732802007-11-01 22:48:15 +0100256 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100257static struct server *get_server_ph(struct proxy *px, const char *uri, int uri_len, const struct server *avoid)
Willy Tarreau01732802007-11-01 22:48:15 +0100258{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700259 unsigned int hash = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400260 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200261 const char *p;
262 const char *params;
Willy Tarreau01732802007-11-01 22:48:15 +0100263 int plen;
264
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200265 /* when tot_weight is 0 then so is srv_count */
Willy Tarreau20697042007-11-15 23:26:18 +0100266 if (px->lbprm.tot_weight == 0)
Willy Tarreau01732802007-11-01 22:48:15 +0100267 return NULL;
268
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200269 if ((p = memchr(uri, '?', uri_len)) == NULL)
270 return NULL;
271
Willy Tarreau01732802007-11-01 22:48:15 +0100272 p++;
273
274 uri_len -= (p - uri);
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100275 plen = px->lbprm.arg_len;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200276 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100277
278 while (uri_len > plen) {
279 /* Look for the parameter name followed by an equal symbol */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200280 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100281 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200282 /* OK, we have the parameter here at <params>, and
Willy Tarreau01732802007-11-01 22:48:15 +0100283 * the value after the equal sign, at <p>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200284 * skip the equal symbol
Willy Tarreau01732802007-11-01 22:48:15 +0100285 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200286 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400287 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200288 uri_len -= plen + 1;
289
Bhaskar98634f02013-10-29 23:30:51 -0400290 while (uri_len && *end != '&') {
Willy Tarreau01732802007-11-01 22:48:15 +0100291 uri_len--;
Bhaskar98634f02013-10-29 23:30:51 -0400292 end++;
Willy Tarreau01732802007-11-01 22:48:15 +0100293 }
Bhaskar98634f02013-10-29 23:30:51 -0400294 hash = gen_hash(px, start, (end - start));
295
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500296 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100297 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400298
Willy Tarreau6c30be52019-01-14 17:07:39 +0100299 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100300 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200301 else
302 return map_get_server_hash(px, hash);
Willy Tarreau01732802007-11-01 22:48:15 +0100303 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200304 }
305 /* skip to next parameter */
306 p = memchr(params, '&', uri_len);
307 if (!p)
308 return NULL;
309 p++;
310 uri_len -= (p - params);
311 params = p;
312 }
313 return NULL;
314}
315
316/*
317 * this does the same as the previous server_ph, but check the body contents
318 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100319static struct server *get_server_ph_post(struct stream *s, const struct server *avoid)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200320{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700321 unsigned int hash = 0;
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100322 struct channel *req = &s->req;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200323 struct proxy *px = s->be;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200324 struct htx *htx = htxbuf(&req->buf);
325 struct htx_blk *blk;
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100326 unsigned int plen = px->lbprm.arg_len;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100327 unsigned long len;
328 const char *params, *p, *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200329
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100330 if (px->lbprm.tot_weight == 0)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200331 return NULL;
332
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200333 p = params = NULL;
334 len = 0;
335 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
336 enum htx_blk_type type = htx_get_blk_type(blk);
337 struct ist v;
Willy Tarreauf69d4ff2015-05-02 00:05:47 +0200338
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200339 if (type != HTX_BLK_DATA)
340 continue;
341 v = htx_get_blk_value(htx, blk);
342 p = params = v.ptr;
343 len = v.len;
344 break;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100345 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200346
347 while (len > plen) {
348 /* Look for the parameter name followed by an equal symbol */
349 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100350 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200351 /* OK, we have the parameter here at <params>, and
352 * the value after the equal sign, at <p>
353 * skip the equal symbol
354 */
355 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400356 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200357 len -= plen + 1;
358
Bhaskar98634f02013-10-29 23:30:51 -0400359 while (len && *end != '&') {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200360 if (unlikely(!HTTP_IS_TOKEN(*p))) {
Willy Tarreau157dd632009-12-06 19:18:09 +0100361 /* if in a POST, body must be URI encoded or it's not a URI.
Bhaskar98634f02013-10-29 23:30:51 -0400362 * Do not interpret any possible binary data as a parameter.
Willy Tarreau157dd632009-12-06 19:18:09 +0100363 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200364 if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */
365 break;
366 return NULL; /* oh, no; this is not uri-encoded.
367 * This body does not contain parameters.
368 */
369 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200370 len--;
Bhaskar98634f02013-10-29 23:30:51 -0400371 end++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200372 /* should we break if vlen exceeds limit? */
373 }
Bhaskar98634f02013-10-29 23:30:51 -0400374 hash = gen_hash(px, start, (end - start));
375
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500376 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100377 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400378
Willy Tarreau6c30be52019-01-14 17:07:39 +0100379 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100380 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200381 else
382 return map_get_server_hash(px, hash);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200383 }
384 }
Willy Tarreau01732802007-11-01 22:48:15 +0100385 /* skip to next parameter */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200386 p = memchr(params, '&', len);
Willy Tarreau01732802007-11-01 22:48:15 +0100387 if (!p)
388 return NULL;
389 p++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200390 len -= (p - params);
391 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100392 }
393 return NULL;
394}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200395
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200396
Willy Tarreaubaaee002006-06-26 02:48:02 +0200397/*
Benoitaffb4812009-03-25 13:02:10 +0100398 * This function tries to find a running server for the proxy <px> following
399 * the Header parameter hash method. It looks for a specific parameter in the
400 * URL and hashes it to compute the server ID. This is useful to optimize
401 * performance by avoiding bounces between servers in contexts where sessions
402 * are shared but cookies are not usable. If the parameter is not found, NULL
403 * is returned. If any server is found, it will be returned. If no valid server
Willy Tarreau9fed8582019-01-14 16:04:54 +0100404 * is found, NULL is returned. When lbprm.arg_opt1 is set, the hash will only
405 * apply to the middle part of a domain name ("use_domain_only" option).
Benoitaffb4812009-03-25 13:02:10 +0100406 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100407static struct server *get_server_hh(struct stream *s, const struct server *avoid)
Benoitaffb4812009-03-25 13:02:10 +0100408{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700409 unsigned int hash = 0;
Benoitaffb4812009-03-25 13:02:10 +0100410 struct proxy *px = s->be;
Willy Tarreau484ff072019-01-14 15:28:53 +0100411 unsigned int plen = px->lbprm.arg_len;
Benoitaffb4812009-03-25 13:02:10 +0100412 unsigned long len;
Benoitaffb4812009-03-25 13:02:10 +0100413 const char *p;
Bhaskar98634f02013-10-29 23:30:51 -0400414 const char *start, *end;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200415 struct htx *htx = htxbuf(&s->req.buf);
416 struct http_hdr_ctx ctx = { .blk = NULL };
Benoitaffb4812009-03-25 13:02:10 +0100417
418 /* tot_weight appears to mean srv_count */
419 if (px->lbprm.tot_weight == 0)
420 return NULL;
421
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200422 /* note: we won't hash if there's only one server left */
423 if (px->lbprm.tot_used == 1)
424 goto hash_done;
425
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200426 http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0);
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100427
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200428 /* if the header is not found or empty, let's fallback to round robin */
429 if (!ctx.blk || !ctx.value.len)
430 return NULL;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100431
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200432 /* Found a the param_name in the headers.
433 * we will compute the hash based on this value ctx.val.
434 */
435 len = ctx.value.len;
436 p = ctx.value.ptr;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100437
Willy Tarreau9fed8582019-01-14 16:04:54 +0100438 if (!px->lbprm.arg_opt1) {
Bhaskar98634f02013-10-29 23:30:51 -0400439 hash = gen_hash(px, p, len);
Benoitaffb4812009-03-25 13:02:10 +0100440 } else {
441 int dohash = 0;
Cyril Bontéf607d812015-01-04 15:17:36 +0100442 p += len;
Benoitaffb4812009-03-25 13:02:10 +0100443 /* special computation, use only main domain name, not tld/host
444 * going back from the end of string, start hashing at first
445 * dot stop at next.
446 * This is designed to work with the 'Host' header, and requires
447 * a special option to activate this.
448 */
Cyril Bontéf607d812015-01-04 15:17:36 +0100449 end = p;
Benoitaffb4812009-03-25 13:02:10 +0100450 while (len) {
Cyril Bontéf607d812015-01-04 15:17:36 +0100451 if (dohash) {
452 /* Rewind the pointer until the previous char
453 * is a dot, this will allow to set the start
454 * position of the domain. */
455 if (*(p - 1) == '.')
Benoitaffb4812009-03-25 13:02:10 +0100456 break;
Benoitaffb4812009-03-25 13:02:10 +0100457 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100458 else if (*p == '.') {
459 /* The pointer is rewinded to the dot before the
460 * tld, we memorize the end of the domain and
461 * can enter the domain processing. */
462 end = p;
463 dohash = 1;
464 }
Benoitaffb4812009-03-25 13:02:10 +0100465 p--;
Cyril Bontéf607d812015-01-04 15:17:36 +0100466 len--;
Benoitaffb4812009-03-25 13:02:10 +0100467 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100468 start = p;
Bhaskar98634f02013-10-29 23:30:51 -0400469 hash = gen_hash(px, start, (end - start));
Benoitaffb4812009-03-25 13:02:10 +0100470 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500471 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100472 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200473 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100474 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100475 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200476 else
477 return map_get_server_hash(px, hash);
Benoitaffb4812009-03-25 13:02:10 +0100478}
479
Willy Tarreau34db1082012-04-19 17:16:54 +0200480/* RDP Cookie HASH. */
Willy Tarreau59884a62019-01-02 14:48:31 +0100481static struct server *get_server_rch(struct stream *s, const struct server *avoid)
Emeric Brun736aa232009-06-30 17:56:00 +0200482{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700483 unsigned int hash = 0;
Emeric Brun736aa232009-06-30 17:56:00 +0200484 struct proxy *px = s->be;
485 unsigned long len;
Emeric Brun736aa232009-06-30 17:56:00 +0200486 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +0200487 struct sample smp;
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200488 int rewind;
Emeric Brun736aa232009-06-30 17:56:00 +0200489
490 /* tot_weight appears to mean srv_count */
491 if (px->lbprm.tot_weight == 0)
492 return NULL;
493
Willy Tarreau37406352012-04-23 16:16:37 +0200494 memset(&smp, 0, sizeof(smp));
Emeric Brun736aa232009-06-30 17:56:00 +0200495
Willy Tarreau6a445eb2018-06-19 07:04:45 +0200496 rewind = co_data(&s->req);
497 c_rew(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200498
Willy Tarreau484ff072019-01-14 15:28:53 +0100499 ret = fetch_rdp_cookie_name(s, &smp, px->lbprm.arg_str, px->lbprm.arg_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200500 len = smp.data.u.str.data;
Willy Tarreau664092c2011-12-16 19:11:42 +0100501
Willy Tarreaubcbd3932018-06-06 07:13:22 +0200502 c_adv(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200503
Willy Tarreau37406352012-04-23 16:16:37 +0200504 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0)
Emeric Brun736aa232009-06-30 17:56:00 +0200505 return NULL;
506
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200507 /* note: we won't hash if there's only one server left */
508 if (px->lbprm.tot_used == 1)
509 goto hash_done;
510
Willy Tarreau484ff072019-01-14 15:28:53 +0100511 /* Found the param_name in the headers.
Emeric Brun736aa232009-06-30 17:56:00 +0200512 * we will compute the hash based on this value ctx.val.
513 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200514 hash = gen_hash(px, smp.data.u.str.area, len);
Bhaskar98634f02013-10-29 23:30:51 -0400515
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500516 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100517 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200518 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100519 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100520 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200521 else
522 return map_get_server_hash(px, hash);
Emeric Brun736aa232009-06-30 17:56:00 +0200523}
Christopher Faulet5b517552017-06-09 14:17:53 +0200524
Willy Tarreau760e81d2018-05-03 07:20:40 +0200525/* random value */
Willy Tarreau59884a62019-01-02 14:48:31 +0100526static struct server *get_server_rnd(struct stream *s, const struct server *avoid)
Willy Tarreau760e81d2018-05-03 07:20:40 +0200527{
528 unsigned int hash = 0;
529 struct proxy *px = s->be;
Willy Tarreau21c741a2019-01-14 18:14:27 +0100530 struct server *prev, *curr;
531 int draws = px->lbprm.arg_opt1; // number of draws
Willy Tarreau760e81d2018-05-03 07:20:40 +0200532
533 /* tot_weight appears to mean srv_count */
534 if (px->lbprm.tot_weight == 0)
535 return NULL;
536
Willy Tarreau21c741a2019-01-14 18:14:27 +0100537 curr = NULL;
538 do {
539 prev = curr;
540 /* ensure all 32 bits are covered as long as RAND_MAX >= 65535 */
541 hash = ((uint64_t)random() * ((uint64_t)RAND_MAX + 1)) ^ random();
542 curr = chash_get_server_hash(px, hash, avoid);
543 if (!curr)
544 break;
545
546 /* compare the new server to the previous best choice and pick
547 * the one with the least currently served requests.
548 */
549 if (prev && prev != curr &&
550 curr->served * prev->cur_eweight > prev->served * curr->cur_eweight)
551 curr = prev;
552 } while (--draws > 0);
553
554 return curr;
Willy Tarreau760e81d2018-05-03 07:20:40 +0200555}
556
Benoitaffb4812009-03-25 13:02:10 +0100557/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200558 * This function applies the load-balancing algorithm to the stream, as
559 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200560 * 'assigned'.
561 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200562 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200563 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100564 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200565 * The function tries to keep the original connection slot if it reconnects to
566 * the same server, otherwise it releases it and tries to offer it.
567 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200568 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200569 *
570 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100571 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200572 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
573 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200574 * SRV_STATUS_INTERNAL for other unrecoverable errors.
575 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200576 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100577 * it does not need to be called anymore. This means that target_srv(&s->target)
578 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200579 *
580 */
581
Willy Tarreau87b09662015-04-03 00:22:06 +0200582int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200583{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100584 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200585 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100586 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200587 int err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100588
Simon Horman8effd3d2011-08-13 08:03:52 +0900589 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200590
Willy Tarreau7c669d72008-06-20 15:04:11 +0200591 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200592 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200593 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100594
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100595 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200596 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200597
Willy Tarreau7c669d72008-06-20 15:04:11 +0200598 /* We have to release any connection slot before applying any LB algo,
599 * otherwise we may erroneously end up with no available slot.
600 */
601 if (conn_slot)
602 sess_change_server(s, NULL);
603
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100604 /* We will now try to find the good server and store it into <objt_server(s->target)>.
605 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200606 * as well as if no server is available (check error code).
607 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100608
Willy Tarreau827aee92011-03-10 16:55:02 +0100609 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100610 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100611
Olivier Houchardba4fff52018-12-01 14:40:40 +0100612 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200613 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100614 (s->be->options & PR_O_PREF_LAST))) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100615 struct sess_srv_list *srv_list;
616 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
617 struct server *tmpsrv = objt_server(srv_list->target);
Olivier Houchardba4fff52018-12-01 14:40:40 +0100618
619 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200620 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100621 (!s->be->max_ka_queue ||
622 server_has_room(tmpsrv) || (
623 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
624 srv_currently_usable(tmpsrv)) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100625 list_for_each_entry(conn, &srv_list->conn_list, session_list) {
Olivier Houchardba4fff52018-12-01 14:40:40 +0100626 if (conn->flags & CO_FL_CONNECTED) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100627
Olivier Houchardba4fff52018-12-01 14:40:40 +0100628 srv = tmpsrv;
629 s->target = &srv->obj_type;
630 goto out_ok;
631 }
632 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100633 }
634 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100635 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100636 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200637
Willy Tarreau7c669d72008-06-20 15:04:11 +0200638 /* we must check if we have at least one server available */
639 if (!s->be->lbprm.tot_weight) {
640 err = SRV_STATUS_NOSRV;
641 goto out;
642 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200643
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200644 /* First check whether we need to fetch some data or simply call
645 * the LB lookup function. Only the hashing functions will need
646 * some input data in fact, and will support multiple algorithms.
647 */
648 switch (s->be->lbprm.algo & BE_LB_LKUP) {
649 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100650 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200651 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200652
Willy Tarreauf09c6602012-02-13 17:12:08 +0100653 case BE_LB_LKUP_FSTREE:
654 srv = fas_get_next_server(s->be, prev_srv);
655 break;
656
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200657 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100658 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200659 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200660
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200661 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200662 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200663 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200664 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
Willy Tarreau59884a62019-01-02 14:48:31 +0100665 srv = get_server_rnd(s, prev_srv);
Willy Tarreau6c30be52019-01-14 17:07:39 +0100666 else if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100667 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200668 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100669 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200670 break;
671 }
672 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200673 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200674 err = SRV_STATUS_INTERNAL;
675 goto out;
676 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200677
678 switch (s->be->lbprm.algo & BE_LB_PARM) {
679 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200680 conn = objt_conn(strm_orig(s));
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200681 if (conn && conn_get_src(conn) && conn->src->ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200682 srv = get_server_sh(s->be,
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200683 (void *)&((struct sockaddr_in *)conn->src)->sin_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100684 4, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200685 }
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200686 else if (conn && conn_get_src(conn) && conn->src->ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200687 srv = get_server_sh(s->be,
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200688 (void *)&((struct sockaddr_in6 *)conn->src)->sin6_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100689 16, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200690 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200691 else {
692 /* unknown IP family */
693 err = SRV_STATUS_INTERNAL;
694 goto out;
695 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200696 break;
697
698 case BE_LB_HASH_URI:
699 /* URI hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200700 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100701 struct ist uri;
702
Christopher Faulet297fbb42019-05-13 14:41:27 +0200703 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100704 srv = get_server_uh(s->be, uri.ptr, uri.len, prev_srv);
705 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200706 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200707
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200708 case BE_LB_HASH_PRM:
709 /* URL Parameter hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200710 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100711 struct ist uri;
712
Christopher Faulet297fbb42019-05-13 14:41:27 +0200713 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100714 srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv);
Willy Tarreau61a21a32011-03-01 20:35:49 +0100715
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200716 if (!srv && s->txn->meth == HTTP_METH_POST)
717 srv = get_server_ph_post(s, prev_srv);
718 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200719 break;
Benoitaffb4812009-03-25 13:02:10 +0100720
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200721 case BE_LB_HASH_HDR:
722 /* Header Parameter hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200723 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY)
724 srv = get_server_hh(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200725 break;
726
727 case BE_LB_HASH_RDP:
728 /* RDP Cookie hashing */
Willy Tarreau59884a62019-01-02 14:48:31 +0100729 srv = get_server_rch(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200730 break;
731
732 default:
733 /* unknown balancing algorithm */
734 err = SRV_STATUS_INTERNAL;
735 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100736 }
Emeric Brun736aa232009-06-30 17:56:00 +0200737
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200738 /* If the hashing parameter was not found, let's fall
739 * back to round robin on the map.
740 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100741 if (!srv) {
Willy Tarreau6c30be52019-01-14 17:07:39 +0100742 if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100743 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200744 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100745 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200746 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200747
748 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200749 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200750
Willy Tarreau7c669d72008-06-20 15:04:11 +0200751 default:
752 /* unknown balancing algorithm */
753 err = SRV_STATUS_INTERNAL;
754 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200755 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200756
Willy Tarreau827aee92011-03-10 16:55:02 +0100757 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200758 err = SRV_STATUS_FULL;
759 goto out;
760 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100761 else if (srv != prev_srv) {
Olivier Houchard237f7812019-03-08 18:49:07 +0100762 _HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
763 _HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100764 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100765 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200766 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200767 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100768 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200769 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100770 else if ((s->be->options & PR_O_HTTP_PROXY)) {
771 conn = cs_conn(objt_cs(s->si[1].end));
772
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200773 if (conn && conn->dst && is_addr(conn->dst)) {
Olivier Houchard2442f682018-12-01 17:03:38 +0100774 /* in proxy mode, we need a valid destination address */
775 s->target = &s->be->obj_type;
776 } else {
777 err = SRV_STATUS_NOSRV;
778 goto out;
779 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100780 }
781 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200782 err = SRV_STATUS_NOSRV;
783 goto out;
784 }
785
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100786out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200787 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200788 err = SRV_STATUS_OK;
789 out:
790
791 /* Either we take back our connection slot, or we offer it to someone
792 * else if we don't need it anymore.
793 */
794 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100795 if (conn_slot == srv) {
796 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200797 } else {
798 if (may_dequeue_tasks(conn_slot, s->be))
799 process_srv_queue(conn_slot);
800 }
801 }
802
803 out_err:
804 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200805}
806
Willy Tarreaubaaee002006-06-26 02:48:02 +0200807/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200808 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200809 * The address is taken from the currently assigned server, or from the
810 * dispatch or transparent address.
811 *
812 * It may return :
813 * SRV_STATUS_OK if everything is OK.
814 * SRV_STATUS_INTERNAL for other unrecoverable errors.
815 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200816 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200817 * not cleared, so it's to the caller to clear it if required.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200818 */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200819int assign_server_address(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200820{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200821 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200822
Christopher Faulet56803b12017-11-24 16:06:18 +0100823 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200824
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200825 if (!sockaddr_alloc(&s->target_addr))
Willy Tarreauca79f592019-07-17 19:04:47 +0200826 return SRV_STATUS_INTERNAL;
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200827
Willy Tarreaue7dff022015-04-03 01:14:29 +0200828 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200829 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200830 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200831 return SRV_STATUS_INTERNAL;
832
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200833 *s->target_addr = __objt_server(s->target)->addr;
834 set_host_port(s->target_addr, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200835
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200836 if (!is_addr(s->target_addr) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200837 /* if the server has no address, we use the same address
838 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200839 * locally on multiple addresses at once. Nothing is done
840 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200841 */
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200842 if (!conn_get_dst(cli_conn)) {
843 /* do nothing if we can't retrieve the address */
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200844 } else if (cli_conn->dst->ss_family == AF_INET) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200845 ((struct sockaddr_in *)s->target_addr)->sin_addr = ((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200846 } else if (cli_conn->dst->ss_family == AF_INET6) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200847 ((struct sockaddr_in6 *)s->target_addr)->sin6_addr = ((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr;
Emeric Brunec810d12010-10-22 16:36:33 +0200848 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200849 }
850
Willy Tarreaubaaee002006-06-26 02:48:02 +0200851 /* if this server remaps proxied ports, we'll use
852 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +0200853 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +0100854 int base_port;
855
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200856 if (conn_get_dst(cli_conn)) {
857 /* First, retrieve the port from the incoming connection */
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200858 base_port = get_host_port(cli_conn->dst);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100859
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200860 /* Second, assign the outgoing connection's port */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200861 base_port += get_host_port(s->target_addr);
862 set_host_port(s->target_addr, base_port);
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200863 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200864 }
865 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200866 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200867 /* connect to the defined dispatch addr */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200868 *s->target_addr = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200869 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200870 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200871 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200872 if (conn_get_dst(cli_conn) &&
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200873 (cli_conn->dst->ss_family == AF_INET || cli_conn->dst->ss_family == AF_INET6))
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200874 *s->target_addr = *cli_conn->dst;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200875 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100876 else if (s->be->options & PR_O_HTTP_PROXY) {
877 /* If HTTP PROXY option is set, then server is already assigned
878 * during incoming client request parsing. */
879 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +0100880 else {
881 /* no server and no LB algorithm ! */
882 return SRV_STATUS_INTERNAL;
883 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200884
Willy Tarreaue7dff022015-04-03 01:14:29 +0200885 s->flags |= SF_ADDR_SET;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200886 return SRV_STATUS_OK;
887}
888
Willy Tarreau87b09662015-04-03 00:22:06 +0200889/* This function assigns a server to stream <s> if required, and can add the
Willy Tarreaubaaee002006-06-26 02:48:02 +0200890 * connection to either the assigned server's queue or to the proxy's queue.
Willy Tarreau87b09662015-04-03 00:22:06 +0200891 * If ->srv_conn is set, the stream is first released from the server.
Willy Tarreaue7dff022015-04-03 01:14:29 +0200892 * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will
Willy Tarreau7c669d72008-06-20 15:04:11 +0200893 * be called before any connection and after any retry or redispatch occurs.
894 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200895 * It is not allowed to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200896 *
897 * Returns :
898 *
899 * SRV_STATUS_OK if everything is OK.
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100900 * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200901 * SRV_STATUS_QUEUED if the connection has been queued.
902 * SRV_STATUS_FULL if the server(s) is/are saturated and the
Willy Tarreau827aee92011-03-10 16:55:02 +0100903 * connection could not be queued at the server's,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200904 * which may be NULL if we queue on the backend.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200905 * SRV_STATUS_INTERNAL for other unrecoverable errors.
906 *
907 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200908int assign_server_and_queue(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200909{
910 struct pendconn *p;
Willy Tarreau827aee92011-03-10 16:55:02 +0100911 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200912 int err;
913
914 if (s->pend_pos)
915 return SRV_STATUS_INTERNAL;
916
Willy Tarreau7c669d72008-06-20 15:04:11 +0200917 err = SRV_STATUS_OK;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200918 if (!(s->flags & SF_ASSIGNED)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100919 struct server *prev_srv = objt_server(s->target);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100920
Willy Tarreau7c669d72008-06-20 15:04:11 +0200921 err = assign_server(s);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100922 if (prev_srv) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200923 /* This stream was previously assigned to a server. We have to
924 * update the stream's and the server's stats :
Willy Tarreau7c669d72008-06-20 15:04:11 +0200925 * - if the server changed :
926 * - set TX_CK_DOWN if txn.flags was TX_CK_VALID
Willy Tarreaue7dff022015-04-03 01:14:29 +0200927 * - set SF_REDISP if it was successfully redispatched
Willy Tarreau7c669d72008-06-20 15:04:11 +0200928 * - increment srv->redispatches and be->redispatches
929 * - if the server remained the same : update retries.
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100930 */
931
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100932 if (prev_srv != objt_server(s->target)) {
Willy Tarreaueee5b512015-04-03 23:46:31 +0200933 if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) {
934 s->txn->flags &= ~TX_CK_MASK;
935 s->txn->flags |= TX_CK_DOWN;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200936 }
Willy Tarreaue7dff022015-04-03 01:14:29 +0200937 s->flags |= SF_REDISP;
Olivier Houchard237f7812019-03-08 18:49:07 +0100938 _HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
939 _HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200940 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +0100941 _HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
942 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100943 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100944 }
945 }
946
Willy Tarreaubaaee002006-06-26 02:48:02 +0200947 switch (err) {
948 case SRV_STATUS_OK:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200949 /* we have SF_ASSIGNED set */
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100950 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +0100951 if (!srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200952 return SRV_STATUS_OK; /* dispatch or proxy mode */
953
954 /* If we already have a connection slot, no need to check any queue */
Willy Tarreau827aee92011-03-10 16:55:02 +0100955 if (s->srv_conn == srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200956 return SRV_STATUS_OK;
957
Willy Tarreau87b09662015-04-03 00:22:06 +0200958 /* OK, this stream already has an assigned server, but no
Willy Tarreau7c669d72008-06-20 15:04:11 +0200959 * connection slot yet. Either it is a redispatch, or it was
960 * assigned from persistence information (direct mode).
961 */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200962 if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200963 /* server scheduled for redirection, and already assigned. We
964 * don't want to go further nor check the queue.
Willy Tarreau21d2af32008-02-14 20:25:24 +0100965 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100966 sess_change_server(s, srv); /* not really needed in fact */
Willy Tarreau21d2af32008-02-14 20:25:24 +0100967 return SRV_STATUS_OK;
968 }
969
Willy Tarreau87b09662015-04-03 00:22:06 +0200970 /* We might have to queue this stream if the assigned server is full.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200971 * We know we have to queue it into the server's queue, so if a maxqueue
972 * is set on the server, we must also check that the server's queue is
973 * not full, in which case we have to return FULL.
974 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100975 if (srv->maxconn &&
976 (srv->nbpend || srv->served >= srv_dynamic_maxconn(srv))) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200977
Willy Tarreau827aee92011-03-10 16:55:02 +0100978 if (srv->maxqueue > 0 && srv->nbpend >= srv->maxqueue)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200979 return SRV_STATUS_FULL;
980
Willy Tarreaubaaee002006-06-26 02:48:02 +0200981 p = pendconn_add(s);
982 if (p)
983 return SRV_STATUS_QUEUED;
984 else
Willy Tarreau7c669d72008-06-20 15:04:11 +0200985 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200986 }
Willy Tarreau7c669d72008-06-20 15:04:11 +0200987
988 /* OK, we can use this server. Let's reserve our place */
Willy Tarreau827aee92011-03-10 16:55:02 +0100989 sess_change_server(s, srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200990 return SRV_STATUS_OK;
991
992 case SRV_STATUS_FULL:
Willy Tarreau87b09662015-04-03 00:22:06 +0200993 /* queue this stream into the proxy's queue */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200994 p = pendconn_add(s);
995 if (p)
996 return SRV_STATUS_QUEUED;
997 else
Willy Tarreau7c669d72008-06-20 15:04:11 +0200998 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200999
1000 case SRV_STATUS_NOSRV:
Willy Tarreau7c669d72008-06-20 15:04:11 +02001001 return err;
1002
Willy Tarreaubaaee002006-06-26 02:48:02 +02001003 case SRV_STATUS_INTERNAL:
1004 return err;
Willy Tarreau7c669d72008-06-20 15:04:11 +02001005
Willy Tarreaubaaee002006-06-26 02:48:02 +02001006 default:
1007 return SRV_STATUS_INTERNAL;
1008 }
Willy Tarreau5b6995c2008-01-13 16:31:17 +01001009}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001010
Willy Tarreaub1d67742010-03-29 19:36:59 +02001011/* If an explicit source binding is specified on the server and/or backend, and
1012 * this source makes use of the transparent proxy, then it is extracted now and
Willy Tarreau87b09662015-04-03 00:22:06 +02001013 * assigned to the stream's pending connection. This function assumes that an
Willy Tarreau350f4872014-11-28 14:42:25 +01001014 * outgoing connection has already been assigned to s->si[1].end.
Willy Tarreaub1d67742010-03-29 19:36:59 +02001015 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001016static void assign_tproxy_address(struct stream *s)
Willy Tarreaub1d67742010-03-29 19:36:59 +02001017{
Willy Tarreau29fbe512015-08-20 19:35:14 +02001018#if defined(CONFIG_HAP_TRANSPARENT)
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001019 struct server *srv = objt_server(s->target);
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001020 struct conn_src *src;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001021 struct connection *cli_conn;
Olivier Houchard09a0f032019-01-17 15:59:13 +01001022 struct connection *srv_conn;
1023
1024 if (objt_cs(s->si[1].end))
1025 srv_conn = cs_conn(__objt_cs(s->si[1].end));
1026 else
1027 srv_conn = objt_conn(s->si[1].end);
Willy Tarreau827aee92011-03-10 16:55:02 +01001028
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001029 if (srv && srv->conn_src.opts & CO_SRC_BIND)
1030 src = &srv->conn_src;
1031 else if (s->be->conn_src.opts & CO_SRC_BIND)
1032 src = &s->be->conn_src;
1033 else
1034 return;
Willy Tarreau294c4732011-12-16 21:35:50 +01001035
Willy Tarreauca79f592019-07-17 19:04:47 +02001036 if (!sockaddr_alloc(&srv_conn->src))
1037 return;
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001038
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001039 switch (src->opts & CO_SRC_TPROXY_MASK) {
1040 case CO_SRC_TPROXY_ADDR:
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001041 *srv_conn->src = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001042 break;
1043 case CO_SRC_TPROXY_CLI:
1044 case CO_SRC_TPROXY_CIP:
1045 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001046 cli_conn = objt_conn(strm_orig(s));
Willy Tarreau3cc01d82019-07-17 11:27:38 +02001047 if (cli_conn && conn_get_src(cli_conn))
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001048 *srv_conn->src = *cli_conn->src;
1049 else {
Willy Tarreau16aa4af2019-07-18 11:16:41 +02001050 sockaddr_free(&srv_conn->src);
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001051 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001052 break;
1053 case CO_SRC_TPROXY_DYN:
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001054 if (src->bind_hdr_occ && IS_HTX_STRM(s)) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001055 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001056 size_t vlen;
Willy Tarreau294c4732011-12-16 21:35:50 +01001057
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001058 /* bind to the IP in a header */
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001059 ((struct sockaddr_in *)srv_conn->src)->sin_family = AF_INET;
1060 ((struct sockaddr_in *)srv_conn->src)->sin_port = 0;
1061 ((struct sockaddr_in *)srv_conn->src)->sin_addr.s_addr = 0;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001062 if (http_get_htx_hdr(htxbuf(&s->req.buf),
1063 ist2(src->bind_hdr_name, src->bind_hdr_len),
1064 src->bind_hdr_occ, NULL, &vptr, &vlen)) {
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001065 ((struct sockaddr_in *)srv_conn->src)->sin_addr.s_addr =
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001066 htonl(inetaddr_host_lim(vptr, vptr + vlen));
Willy Tarreaubce70882009-09-07 11:51:47 +02001067 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001068 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001069 break;
1070 default:
Willy Tarreau16aa4af2019-07-18 11:16:41 +02001071 sockaddr_free(&srv_conn->src);
Willy Tarreaub1d67742010-03-29 19:36:59 +02001072 }
1073#endif
1074}
1075
Lukas Tribusda95fd92018-11-25 13:21:27 +01001076#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001077/*
1078 * Pick the right mux once the connection is established, we should now have
Willy Tarreau94031d32018-12-19 14:36:29 +01001079 * an alpn if available, so we are now able to choose. In this specific case
1080 * the connection's context is &si[i].end.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001081 */
1082static int conn_complete_server(struct connection *conn)
1083{
1084 struct conn_stream *cs = NULL;
Willy Tarreau94031d32018-12-19 14:36:29 +01001085 struct stream *s = container_of(conn->ctx, struct stream, si[1].end);
Olivier Houchardbf024f02018-11-29 17:08:53 +01001086 struct server *srv;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001087
Olivier Houchard70d9b2f2018-11-29 16:57:32 +01001088 task_wakeup(s->task, TASK_WOKEN_IO);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001089 conn_clear_xprt_done_cb(conn);
1090 /* Verify if the connection just established. */
1091 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED))))
1092 conn->flags |= CO_FL_CONNECTED;
1093
Olivier Houchard201b9f42018-11-21 00:16:29 +01001094 if (conn->flags & CO_FL_ERROR)
1095 goto fail;
Olivier Houchardd76bd2d2018-11-29 16:58:49 +01001096 si_detach_endpoint(&s->si[1]);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001097 cs = si_alloc_cs(&s->si[1], conn);
1098 if (!cs)
1099 goto fail;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001100 if (conn_install_mux_be(conn, cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001101 goto fail;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001102 srv = objt_server(s->target);
Olivier Houchard7aec9ed2018-12-14 19:31:51 +01001103 if (srv && ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
Olivier Houchardbf024f02018-11-29 17:08:53 +01001104 conn->mux->avail_streams(conn) > 0)
1105 LIST_ADD(&srv->idle_conns[tid], &conn->list);
1106
Olivier Houchard201b9f42018-11-21 00:16:29 +01001107 return 0;
1108
1109fail:
Willy Tarreaud8220132019-01-28 16:33:35 +01001110 si_detach_endpoint(&s->si[1]);
1111
Olivier Houchard201b9f42018-11-21 00:16:29 +01001112 if (cs)
1113 cs_free(cs);
1114 /* kill the connection now */
1115 conn_stop_tracking(conn);
1116 conn_full_close(conn);
1117 conn_free(conn);
Olivier Houchard4f417512018-12-27 18:59:46 +01001118 /* Let process_stream know it went wrong */
1119 s->si[1].flags |= SI_FL_ERR;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001120 return -1;
1121}
Olivier Houchardc6e0bb42018-11-23 14:24:10 +01001122#endif
Olivier Houchard201b9f42018-11-21 00:16:29 +01001123
Willy Tarreaub1d67742010-03-29 19:36:59 +02001124
Willy Tarreaubaaee002006-06-26 02:48:02 +02001125/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001126 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001127 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001128 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001129 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001130 * - SF_ERR_NONE if everything's OK
1131 * - SF_ERR_SRVTO if there are no more servers
1132 * - SF_ERR_SRVCL if the connection was refused by the server
1133 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1134 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1135 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001136 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001137 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001138 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001139 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001140int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001141{
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001142 struct connection *cli_conn = objt_conn(strm_orig(s));
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001143 struct connection *srv_conn = NULL;
1144 struct connection *old_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001145 struct conn_stream *srv_cs = NULL;
Willy Tarreaub0821862019-07-18 19:26:11 +02001146 struct sess_srv_list *srv_list;
Willy Tarreau827aee92011-03-10 16:55:02 +01001147 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001148 int reuse = 0;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001149 int reuse_orphan = 0;
Olivier Houchard5cd62172019-01-04 15:52:26 +01001150 int init_mux = 0;
Olivier Houchard4dc85532019-01-29 15:50:38 +01001151 int alloced_cs = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001152 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001153
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001154
Willy Tarreaua5797aa2019-07-18 18:40:06 +02001155 /* This will catch some corner cases such as lying connections resulting from
1156 * retries or connect timeouts but will rarely trigger.
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001157 */
Willy Tarreaua5797aa2019-07-18 18:40:06 +02001158 si_release_endpoint(&s->si[1]);
1159
Willy Tarreaub0821862019-07-18 19:26:11 +02001160 /* first, search for a matching connection in the session's idle conns */
1161 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
1162 if (srv_list->target == s->target) {
1163 list_for_each_entry(srv_conn, &srv_list->conn_list, session_list) {
1164 if (conn_xprt_ready(srv_conn) &&
1165 srv_conn->mux && (srv_conn->mux->avail_streams(srv_conn) > 0)) {
1166 reuse = 1;
1167 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001168 }
1169 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001170 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001171 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001172 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001173
Willy Tarreaub0821862019-07-18 19:26:11 +02001174 if (!reuse) {
1175 /* no connection was found in our session's list. Pick any
1176 * random one that we could trade against another one.
1177 */
1178 srv_conn = NULL;
1179 if (!LIST_ISEMPTY(&s->sess->srv_list)) {
1180 srv_list = LIST_ELEM(s->sess->srv_list.n, struct sess_srv_list *, srv_list);
1181 if (!LIST_ISEMPTY(&srv_list->conn_list))
1182 srv_conn = LIST_ELEM(srv_list->conn_list.n, struct connection *, session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001183 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001184
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001185 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001186 /* OK at this point we have this :
1187 * - srv_conn points to an existing connection or NULL
1188 * - if reuse is set, srv_conn holds a valid connection, otherwise it
1189 * points to any of our old connections we may want to trade against
1190 * another one
1191 */
1192
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001193 old_conn = srv_conn;
1194
Willy Tarreau7b004922015-08-04 19:34:21 +02001195 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001196
Willy Tarreau8dff9982015-08-04 20:45:52 +02001197 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001198 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001199
Willy Tarreau449d74a2015-08-05 17:16:33 +02001200 /* Below we pick connections from the safe or idle lists based
1201 * on the strategy, the fact that this is a first or second
1202 * (retryable) request, with the indicated priority (1 or 2) :
1203 *
1204 * SAFE AGGR ALWS
1205 *
1206 * +-----+-----+ +-----+-----+ +-----+-----+
1207 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1208 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1209 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1210 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1211 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1212 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
Willy Tarreaub0821862019-07-18 19:26:11 +02001213 *
1214 * Idle conns are necessarily looked up on the same thread so
1215 * that there is no concurrency issues.
Willy Tarreau449d74a2015-08-05 17:16:33 +02001216 */
Christopher Faulet40a007c2017-07-03 15:41:01 +02001217 if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001218 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1219 s->txn && (s->txn->flags & TX_NOT_FIRST))) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001220 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001221 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001222 else if (srv->safe_conns && !LIST_ISEMPTY(&srv->safe_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001223 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1224 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR)) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001225 srv_conn = LIST_ELEM(srv->safe_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001226 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001227 else if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001228 (s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001229 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001230 } else if (srv->idle_orphan_conns && !LIST_ISEMPTY(&srv->idle_orphan_conns[tid]) &&
1231 (((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) ||
1232 (((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
1233 s->txn && (s->txn->flags & TX_NOT_FIRST)))) {
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001234 srv_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
Willy Tarreauc912f942019-02-28 16:06:56 +01001235 struct connection *, list);
1236 if (srv_conn)
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001237 reuse_orphan = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001238 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001239
Willy Tarreau449d74a2015-08-05 17:16:33 +02001240 /* If we've picked a connection from the pool, we now have to
1241 * detach it. We may have to get rid of the previous idle
1242 * connection we had, so for this we try to swap it with the
1243 * other owner's. That way it may remain alive for others to
1244 * pick.
1245 */
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001246 if (srv_conn)
Willy Tarreau8dff9982015-08-04 20:45:52 +02001247 reuse = 1;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001248 }
1249
Willy Tarreaub0821862019-07-18 19:26:11 +02001250
1251 /* here reuse might have been set above, indicating srv_conn finally
1252 * is OK.
1253 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001254 if (reuse) {
1255 /* Disable connection reuse if a dynamic source is used.
1256 * As long as we don't share connections between servers,
1257 * we don't need to disable connection reuse on no-idempotent
1258 * requests nor when PROXY protocol is used.
1259 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001260 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1261 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1262 reuse = 0;
1263 }
1264 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1265 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1266 reuse = 0;
1267 }
1268 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001269
Olivier Houchard14fcc2e2019-06-05 13:55:01 +02001270 if (((!reuse || (srv_conn && !(srv_conn->flags & CO_FL_CONNECTED)))
1271 && ha_used_fds > global.tune.pool_high_count) && srv->idle_orphan_conns) {
Olivier Houchard88698d92019-04-16 19:07:22 +02001272 struct connection *tokill_conn;
1273
1274 /* We can't reuse a connection, and e have more FDs than deemd
1275 * acceptable, attempt to kill an idling connection
1276 */
1277 /* First, try from our own idle list */
1278 tokill_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
1279 struct connection *, list);
1280 if (tokill_conn)
1281 tokill_conn->mux->destroy(tokill_conn->ctx);
1282 /* If not, iterate over other thread's idling pool, and try to grab one */
1283 else {
1284 int i;
1285
1286 for (i = 0; i < global.nbthread; i++) {
1287 if (i == tid)
1288 continue;
Willy Tarreau08e2b412019-05-26 11:50:08 +02001289
1290 // just silence stupid gcc which reports an absurd
1291 // out-of-bounds warning for <i> which is always
1292 // exactly zero without threads, but it seems to
1293 // see it possibly larger.
1294 ALREADY_CHECKED(i);
1295
Olivier Houchard88698d92019-04-16 19:07:22 +02001296 tokill_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[i],
1297 struct connection *, list);
1298 if (tokill_conn) {
1299 /* We got one, put it into the concerned thread's to kill list, and wake it's kill task */
1300
1301 LIST_ADDQ_LOCKED(&toremove_connections[i],
1302 &tokill_conn->list);
1303 task_wakeup(idle_conn_cleanup[i], TASK_WOKEN_OTHER);
1304 break;
1305 }
1306 }
1307 }
1308
1309 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001310 /* If we're really reusing the connection, remove it from the orphan
1311 * list and add it back to the idle list.
1312 */
Christopher Faulet46451d62019-04-19 15:39:22 +02001313 if (reuse) {
1314 if (reuse_orphan) {
1315 srv_conn->idle_time = 0;
1316 _HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
1317 __ha_barrier_atomic_store();
1318 srv->curr_idle_thr[tid]--;
1319 LIST_ADDQ(&srv->idle_conns[tid], &srv_conn->list);
1320 }
1321 else {
1322 if (srv_conn->flags & CO_FL_SESS_IDLE) {
1323 struct session *sess = srv_conn->owner;
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001324
Christopher Faulet46451d62019-04-19 15:39:22 +02001325 srv_conn->flags &= ~CO_FL_SESS_IDLE;
1326 sess->idle_conns--;
1327 }
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001328 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001329 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001330
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001331 /* We're about to use another connection, let the mux know we're
Willy Tarreaub0821862019-07-18 19:26:11 +02001332 * done with this one.
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001333 */
Olivier Houchardc685d702018-12-28 16:20:25 +01001334 if (old_conn != srv_conn && old_conn && reuse && !reuse_orphan) {
1335 struct session *sess = srv_conn->owner;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001336
Olivier Houchardc685d702018-12-28 16:20:25 +01001337 if (sess) {
1338 if (old_conn && !(old_conn->flags & CO_FL_PRIVATE) &&
1339 old_conn->mux != NULL) {
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001340 if (old_conn->flags & CO_FL_SESS_IDLE)
1341 s->sess->idle_conns--;
Olivier Houchardc685d702018-12-28 16:20:25 +01001342 session_unown_conn(s->sess, old_conn);
1343 old_conn->owner = sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001344 if (!session_add_conn(sess, old_conn, old_conn->target)) {
Olivier Houcharda48237f2019-05-02 12:04:15 +02001345 old_conn->flags &= ~CO_FL_SESS_IDLE;
Olivier Houchardc685d702018-12-28 16:20:25 +01001346 old_conn->owner = NULL;
Christopher Faulet73c12072019-04-08 11:23:22 +02001347 old_conn->mux->destroy(old_conn->ctx);
Olivier Houchardc685d702018-12-28 16:20:25 +01001348 } else
1349 session_check_idle_conn(sess, old_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001350 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001351 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001352 }
1353
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001354 if (reuse) {
Willy Tarreaub0821862019-07-18 19:26:11 +02001355 if (srv_conn->mux) {
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001356 int avail = srv_conn->mux->avail_streams(srv_conn);
1357
1358 if (avail <= 1) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001359 /* No more streams available, remove it from the list */
1360 LIST_DEL(&srv_conn->list);
1361 LIST_INIT(&srv_conn->list);
1362 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001363
1364 if (avail >= 1) {
1365 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001366 if (srv_cs) {
1367 alloced_cs = 1;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001368 si_attach_cs(&s->si[1], srv_cs);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001369 } else
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001370 srv_conn = NULL;
1371 }
Olivier Houchard134a2042018-12-28 14:45:47 +01001372 else
1373 srv_conn = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001374 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001375 /* otherwise srv_conn is left intact */
1376 }
1377 else
1378 srv_conn = NULL;
1379
1380 /* no reuse or failed to reuse the connection above, pick a new one */
1381 if (!srv_conn) {
1382 srv_conn = conn_new();
Willy Tarreau1da41ec2019-02-01 16:38:48 +01001383 if (srv_conn)
1384 srv_conn->target = s->target;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001385 srv_cs = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001386 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001387
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001388 if (srv_conn && old_conn != srv_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001389 if (srv_conn->owner)
1390 session_unown_conn(srv_conn->owner, srv_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001391 srv_conn->owner = s->sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001392 if (!session_add_conn(s->sess, srv_conn, srv_conn->target)) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001393 /* If we failed to attach the connection, detach the
1394 * conn_stream, possibly destroying the connection */
Olivier Houchard4dc85532019-01-29 15:50:38 +01001395 if (alloced_cs)
1396 si_release_endpoint(&s->si[1]);
Olivier Houchard351411f2018-12-27 17:20:54 +01001397 srv_conn->owner = NULL;
Olivier Houchard26da3232019-01-29 16:05:02 +01001398 if (srv_conn->mux && !srv_add_to_idle_list(objt_server(srv_conn->target), srv_conn))
Olivier Houchard351411f2018-12-27 17:20:54 +01001399 /* The server doesn't want it, let's kill the connection right away */
Christopher Faulet73c12072019-04-08 11:23:22 +02001400 srv_conn->mux->destroy(srv_conn->ctx);
Olivier Houchard351411f2018-12-27 17:20:54 +01001401 srv_conn = NULL;
1402
1403 }
Willy Tarreau323a2d92015-08-04 19:00:17 +02001404 }
Willy Tarreauc12b5e62015-08-04 19:45:36 +02001405
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001406 if (!srv_conn || !sockaddr_alloc(&srv_conn->dst))
Willy Tarreaue7dff022015-04-03 01:14:29 +02001407 return SF_ERR_RESOURCE;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001408
Willy Tarreaue7dff022015-04-03 01:14:29 +02001409 if (!(s->flags & SF_ADDR_SET)) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001410 err = assign_server_address(s);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001411 if (err != SRV_STATUS_OK)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001412 return SF_ERR_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001413 }
1414
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001415 /* copy the target address into the connection */
1416 *srv_conn->dst = *s->target_addr;
1417
1418 /* Copy network namespace from client connection */
1419 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
1420
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001421 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreauff605db2013-12-20 11:09:51 +01001422 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001423 if (srv)
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001424 conn_prepare(srv_conn, protocol_by_family(srv_conn->dst->ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001425 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1426 /* proxies exclusively run on raw_sock right now */
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001427 conn_prepare(srv_conn, protocol_by_family(srv_conn->dst->ss_family), xprt_get(XPRT_RAW));
Olivier Houchard12950162018-11-23 14:32:08 +01001428 if (!(srv_conn->ctrl))
Willy Tarreaue7dff022015-04-03 01:14:29 +02001429 return SF_ERR_INTERNAL;
Willy Tarreauff605db2013-12-20 11:09:51 +01001430 }
1431 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001432 return SF_ERR_INTERNAL; /* how did we get there ? */
Willy Tarreaud02394b2012-05-11 18:32:18 +02001433
Lukas Tribusda95fd92018-11-25 13:21:27 +01001434#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001435 if (!srv ||
1436 ((!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
Olivier Houchardb4a8b2c2019-06-15 00:13:15 +02001437 srv->mux_proto || s->be->mode != PR_MODE_HTTP))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001438#endif
1439 {
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001440 srv_cs = objt_cs(s->si[1].end);
1441 if (!srv_cs || srv_cs->conn != srv_conn)
1442 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001443 if (!srv_cs) {
1444 conn_free(srv_conn);
1445 return SF_ERR_RESOURCE;
1446 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001447 init_mux = 1;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001448 }
Lukas Tribusda95fd92018-11-25 13:21:27 +01001449#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001450 else {
Willy Tarreau94031d32018-12-19 14:36:29 +01001451 srv_conn->ctx = &s->si[1].end;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001452 /* Store the connection into the stream interface,
1453 * while we still don't have a mux, so that if the
1454 * stream is destroyed before the connection is
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001455 * established, we have a chance to destroy it even
1456 * if it is no longer referenced in the session.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001457 */
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001458 s->si[1].end = &srv_conn->obj_type;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001459 conn_set_xprt_done_cb(srv_conn, conn_complete_server);
1460 }
1461
1462#endif
Willy Tarreauff605db2013-12-20 11:09:51 +01001463 /* process the case where the server requires the PROXY protocol to be sent */
1464 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001465
Willy Tarreau7b004922015-08-04 19:34:21 +02001466 if (srv && srv->pp_opts) {
Willy Tarreau387ebf82015-08-04 19:24:13 +02001467 srv_conn->flags |= CO_FL_PRIVATE;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001468 srv_conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreauff605db2013-12-20 11:09:51 +01001469 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001470 if (cli_conn)
Willy Tarreau3cc01d82019-07-17 11:27:38 +02001471 conn_get_dst(cli_conn);
Willy Tarreauff605db2013-12-20 11:09:51 +01001472 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001473
Willy Tarreauff605db2013-12-20 11:09:51 +01001474 assign_tproxy_address(s);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001475
1476 if (srv && (srv->flags & SRV_F_SOCKS4_PROXY)) {
1477 srv_conn->send_proxy_ofs = 1;
1478 srv_conn->flags |= CO_FL_SOCKS4;
1479 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001480 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001481 else if (!conn_xprt_ready(srv_conn)) {
1482 if (srv_conn->mux->reset)
1483 srv_conn->mux->reset(srv_conn);
1484 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001485 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001486 s->flags |= SF_SRV_REUSED;
Willy Tarreaub1d67742010-03-29 19:36:59 +02001487
William Lallemandb7ff6a32012-03-02 14:35:21 +01001488 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001489 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001490 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001491
Willy Tarreau14f8e862012-08-30 22:23:13 +02001492 /* disable lingering */
1493 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001494 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001495
Willy Tarreauf1573842018-12-14 11:35:36 +01001496 if (s->flags & SF_SRV_REUSED) {
Olivier Houchard237f7812019-03-08 18:49:07 +01001497 _HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001498 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001499 _HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001500 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +01001501 _HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001502 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001503 _HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001504 }
1505
Olivier Houchard201b9f42018-11-21 00:16:29 +01001506 err = si_connect(&s->si[1], srv_conn);
Willy Tarreau09e02032019-07-18 16:18:20 +02001507 if (err != SF_ERR_NONE)
1508 return err;
1509
Olivier Houchard5cd62172019-01-04 15:52:26 +01001510 /* We have to defer the mux initialization until after si_connect()
1511 * has been called, as we need the xprt to have been properly
1512 * initialized, or any attempt to recv during the mux init may
1513 * fail, and flag the connection as CO_FL_ERROR.
1514 */
1515 if (init_mux) {
Olivier Houchard74931142019-01-29 19:11:16 +01001516 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0) {
1517 conn_full_close(srv_conn);
Olivier Houchard5cd62172019-01-04 15:52:26 +01001518 return SF_ERR_INTERNAL;
Olivier Houchard74931142019-01-29 19:11:16 +01001519 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001520 /* If we're doing http-reuse always, and the connection
1521 * is an http2 connection, add it to the available list,
1522 * so that others can use it right away.
1523 */
1524 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1525 srv_conn->mux->avail_streams(srv_conn) > 0)
1526 LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
1527 }
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001528 /* The CO_FL_SEND_PROXY flag may have been set by the connect method,
1529 * if so, add our handshake pseudo-XPRT now.
1530 */
Olivier Houchard6c6dc582019-06-24 18:19:40 +02001531 if ((srv_conn->flags & CO_FL_HANDSHAKE_NOSSL)) {
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001532 if (xprt_add_hs(srv_conn) < 0) {
1533 conn_full_close(srv_conn);
1534 return SF_ERR_INTERNAL;
1535 }
1536 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001537
Willy Tarreaubaaee002006-06-26 02:48:02 +02001538
Willy Tarreau5db847a2019-05-09 14:13:35 +02001539#if USE_OPENSSL && (defined(OPENSSL_IS_BORINGSSL) || (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L))
Olivier Houchard4cd2af42019-05-06 15:18:27 +02001540
Olivier Houchard8694e5b2019-06-15 00:14:05 +02001541 if (!reuse && cli_conn && srv && srv_conn->mux &&
Olivier Houchard522eea72017-11-03 16:27:47 +01001542 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001543 /* Only attempt to use early data if either the client sent
1544 * early data, so that we know it can handle a 425, or if
1545 * we are allwoed to retry requests on early data failure, and
1546 * it's our first try
1547 */
1548 ((cli_conn->flags & CO_FL_EARLY_DATA) ||
1549 ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
1550 s->si[1].conn_retries == s->be->conn_retries)) &&
1551 !channel_is_empty(si_oc(&s->si[1])) &&
1552 srv_conn->flags & CO_FL_SSL_WAIT_HS)
Olivier Houchard522eea72017-11-03 16:27:47 +01001553 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001554#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001555
Willy Tarreau14f8e862012-08-30 22:23:13 +02001556 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001557 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001558
Willy Tarreau827aee92011-03-10 16:55:02 +01001559 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001560 int count;
1561
Willy Tarreaue7dff022015-04-03 01:14:29 +02001562 s->flags |= SF_CURR_SESS;
Olivier Houchard237f7812019-03-08 18:49:07 +01001563 count = _HA_ATOMIC_ADD(&srv->cur_sess, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +02001564 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001565 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001566 s->be->lbprm.server_take_conn(srv);
Willy Tarreau732eac42015-07-09 11:40:25 +02001567
1568#ifdef USE_OPENSSL
1569 if (srv->ssl_ctx.sni) {
1570 struct sample *smp;
Willy Tarreau732eac42015-07-09 11:40:25 +02001571
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001572 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1573 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau2e0565c2016-08-09 11:55:21 +02001574 if (smp_make_safe(smp)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001575 ssl_sock_set_servername(srv_conn,
1576 smp->data.u.str.area);
Willy Tarreau387ebf82015-08-04 19:24:13 +02001577 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreau732eac42015-07-09 11:40:25 +02001578 }
1579 }
1580#endif /* USE_OPENSSL */
1581
Willy Tarreaubaaee002006-06-26 02:48:02 +02001582 }
1583
Willy Tarreaue7dff022015-04-03 01:14:29 +02001584 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001585}
1586
1587
Willy Tarreaubaaee002006-06-26 02:48:02 +02001588/* This function performs the "redispatch" part of a connection attempt. It
1589 * will assign a server if required, queue the connection if required, and
1590 * handle errors that might arise at this level. It can change the server
1591 * state. It will return 1 if it encounters an error, switches the server
1592 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1593 * that the connection is ready to use.
1594 */
1595
Willy Tarreau87b09662015-04-03 00:22:06 +02001596int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001597{
Willy Tarreau827aee92011-03-10 16:55:02 +01001598 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001599 int conn_err;
1600
1601 /* We know that we don't have any connection pending, so we will
1602 * try to get a new one, and wait in this state if it's queued
1603 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001604 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001605 conn_err = assign_server_and_queue(s);
1606 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001607
Willy Tarreaubaaee002006-06-26 02:48:02 +02001608 switch (conn_err) {
1609 case SRV_STATUS_OK:
1610 break;
1611
Willy Tarreau7c669d72008-06-20 15:04:11 +02001612 case SRV_STATUS_FULL:
1613 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1614 * and we can redispatch to another server, or it is not and we return
1615 * 503. This only makes sense in DIRECT mode however, because normal LB
1616 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001617 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001618 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001619 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001620 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001621 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001622 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001623 sockaddr_free(&s->target_addr);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001624 goto redispatch;
1625 }
1626
Willy Tarreau350f4872014-11-28 14:42:25 +01001627 if (!s->si[1].err_type) {
1628 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001629 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001630
Olivier Houchard237f7812019-03-08 18:49:07 +01001631 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1632 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001633 return 1;
1634
Willy Tarreaubaaee002006-06-26 02:48:02 +02001635 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001636 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001637 if (!s->si[1].err_type) {
1638 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001639 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001640
Olivier Houchard237f7812019-03-08 18:49:07 +01001641 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001642 return 1;
1643
1644 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001645 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1646 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001647 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001648 return 1;
1649
Willy Tarreaubaaee002006-06-26 02:48:02 +02001650 case SRV_STATUS_INTERNAL:
1651 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001652 if (!s->si[1].err_type) {
1653 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001654 }
1655
Willy Tarreau827aee92011-03-10 16:55:02 +01001656 if (srv)
1657 srv_inc_sess_ctr(srv);
1658 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001659 srv_set_sess_last(srv);
1660 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001661 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1662 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001663
Willy Tarreau87b09662015-04-03 00:22:06 +02001664 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001665 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001666 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001667 return 1;
1668 }
1669 /* if we get here, it's because we got SRV_STATUS_OK, which also
1670 * means that the connection has not been queued.
1671 */
1672 return 0;
1673}
1674
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001675/* sends a log message when a backend goes down, and also sets last
1676 * change date.
1677 */
1678void set_backend_down(struct proxy *be)
1679{
1680 be->last_change = now.tv_sec;
Olivier Houchard237f7812019-03-08 18:49:07 +01001681 _HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001682
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001683 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001684 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001685 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
1686 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001687}
1688
Willy Tarreau87b09662015-04-03 00:22:06 +02001689/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001690 * tries to extract an RDP cookie from the request buffer, and look for the
1691 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02001692 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001693 * list. Nothing is performed if a server was already assigned.
1694 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001695int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001696{
1697 struct proxy *px = s->be;
1698 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02001699 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001700 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01001701 uint16_t port;
1702 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001703 char *p;
1704
Christopher Faulet45073512018-07-20 10:16:29 +02001705 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 +02001706 now_ms, __FUNCTION__,
1707 s,
1708 req,
1709 req->rex, req->wex,
1710 req->flags,
Christopher Faulet45073512018-07-20 10:16:29 +02001711 ci_data(req),
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001712 req->analysers);
1713
Willy Tarreaue7dff022015-04-03 01:14:29 +02001714 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001715 goto no_cookie;
1716
Willy Tarreau37406352012-04-23 16:16:37 +02001717 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001718
Willy Tarreaucadd8c92013-07-22 18:09:52 +02001719 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001720 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001721 goto no_cookie;
1722
Willy Tarreau04276f32017-01-06 17:41:29 +01001723 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
1724 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
1725 * server's IP address in network order, and "port" is the integer corresponding to the
1726 * server's port in network order. Comments please Emeric.
1727 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001728 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001729 if (*p != '.')
1730 goto no_cookie;
1731 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01001732
1733 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001734 if (*p != '.')
1735 goto no_cookie;
1736
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001737 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001738 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02001739 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01001740 port == srv->svc_port &&
1741 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001742 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001743 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001744 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001745 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001746 break;
1747 }
1748 }
1749 srv = srv->next;
1750 }
1751
1752no_cookie:
1753 req->analysers &= ~an_bit;
1754 req->analyse_exp = TICK_ETERNITY;
1755 return 1;
1756}
1757
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001758int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01001759 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001760 return px->down_time;
1761
1762 return now.tv_sec - px->last_change + px->down_time;
1763}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001764
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001765/*
1766 * This function returns a string containing the balancing
1767 * mode of the proxy in a format suitable for stats.
1768 */
1769
1770const char *backend_lb_algo_str(int algo) {
1771
1772 if (algo == BE_LB_ALGO_RR)
1773 return "roundrobin";
1774 else if (algo == BE_LB_ALGO_SRR)
1775 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01001776 else if (algo == BE_LB_ALGO_FAS)
1777 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001778 else if (algo == BE_LB_ALGO_LC)
1779 return "leastconn";
1780 else if (algo == BE_LB_ALGO_SH)
1781 return "source";
1782 else if (algo == BE_LB_ALGO_UH)
1783 return "uri";
1784 else if (algo == BE_LB_ALGO_PH)
1785 return "url_param";
1786 else if (algo == BE_LB_ALGO_HH)
1787 return "hdr";
1788 else if (algo == BE_LB_ALGO_RCH)
1789 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001790 else if (algo == BE_LB_ALGO_NONE)
1791 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001792 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001793 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001794}
1795
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001796/* This function parses a "balance" statement in a backend section describing
1797 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001798 * returns -1, it will write an error message into the <err> buffer which will
1799 * automatically be allocated and must be passed as NULL. The trailing '\n'
1800 * will not be written. The function must be called with <args> pointing to the
1801 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001802 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001803int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001804{
1805 if (!*(args[0])) {
1806 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01001807 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1808 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001809 return 0;
1810 }
1811
1812 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001813 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1814 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001815 }
Willy Tarreau9757a382009-10-03 12:56:50 +02001816 else if (!strcmp(args[0], "static-rr")) {
1817 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1818 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
1819 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01001820 else if (!strcmp(args[0], "first")) {
1821 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1822 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
1823 }
Willy Tarreau51406232008-03-10 22:04:20 +01001824 else if (!strcmp(args[0], "leastconn")) {
1825 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1826 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
1827 }
Willy Tarreau21c741a2019-01-14 18:14:27 +01001828 else if (!strncmp(args[0], "random", 6)) {
Willy Tarreau760e81d2018-05-03 07:20:40 +02001829 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1830 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
Willy Tarreau21c741a2019-01-14 18:14:27 +01001831 curproxy->lbprm.arg_opt1 = 2;
1832
1833 if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */
1834 const char *beg;
1835 char *end;
1836
1837 beg = args[0] + 7;
1838 curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0);
1839
1840 if (*end != ')') {
1841 if (!*end)
1842 memprintf(err, "random : missing closing parenthesis.");
1843 else
1844 memprintf(err, "random : unexpected character '%c' after argument.", *end);
1845 return -1;
1846 }
1847
1848 if (curproxy->lbprm.arg_opt1 < 1) {
1849 memprintf(err, "random : number of draws must be at least 1.");
1850 return -1;
1851 }
1852 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02001853 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001854 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001855 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1856 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001857 }
1858 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001859 int arg = 1;
1860
Willy Tarreau31682232007-11-29 15:38:04 +01001861 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1862 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Willy Tarreaua9a72492019-01-14 16:14:15 +01001863 curproxy->lbprm.arg_opt1 = 0; // "whole"
1864 curproxy->lbprm.arg_opt2 = 0; // "len"
1865 curproxy->lbprm.arg_opt3 = 0; // "depth"
Oskar Stolc8dc41842012-05-19 10:19:54 +01001866
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001867 while (*args[arg]) {
1868 if (!strcmp(args[arg], "len")) {
1869 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001870 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001871 return -1;
1872 }
Willy Tarreaua9a72492019-01-14 16:14:15 +01001873 curproxy->lbprm.arg_opt2 = atoi(args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001874 arg += 2;
1875 }
1876 else if (!strcmp(args[arg], "depth")) {
1877 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001878 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001879 return -1;
1880 }
1881 /* hint: we store the position of the ending '/' (depth+1) so
1882 * that we avoid a comparison while computing the hash.
1883 */
Willy Tarreaua9a72492019-01-14 16:14:15 +01001884 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001885 arg += 2;
1886 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01001887 else if (!strcmp(args[arg], "whole")) {
Willy Tarreaua9a72492019-01-14 16:14:15 +01001888 curproxy->lbprm.arg_opt1 = 1;
Oskar Stolc8dc41842012-05-19 10:19:54 +01001889 arg += 1;
1890 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001891 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01001892 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001893 return -1;
1894 }
1895 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001896 }
Willy Tarreau01732802007-11-01 22:48:15 +01001897 else if (!strcmp(args[0], "url_param")) {
1898 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001899 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01001900 return -1;
1901 }
Willy Tarreau31682232007-11-29 15:38:04 +01001902 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1903 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02001904
Willy Tarreau4c03d1c2019-01-14 15:23:54 +01001905 free(curproxy->lbprm.arg_str);
1906 curproxy->lbprm.arg_str = strdup(args[1]);
1907 curproxy->lbprm.arg_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001908 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001909 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001910 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001911 return -1;
1912 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001913 }
Benoitaffb4812009-03-25 13:02:10 +01001914 }
1915 else if (!strncmp(args[0], "hdr(", 4)) {
1916 const char *beg, *end;
1917
1918 beg = args[0] + 4;
1919 end = strchr(beg, ')');
1920
1921 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001922 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01001923 return -1;
1924 }
1925
1926 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1927 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
1928
Willy Tarreau484ff072019-01-14 15:28:53 +01001929 free(curproxy->lbprm.arg_str);
1930 curproxy->lbprm.arg_len = end - beg;
1931 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
Willy Tarreau9fed8582019-01-14 16:04:54 +01001932 curproxy->lbprm.arg_opt1 = 0;
Benoitaffb4812009-03-25 13:02:10 +01001933
1934 if (*args[1]) {
1935 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001936 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01001937 return -1;
1938 }
Willy Tarreau9fed8582019-01-14 16:04:54 +01001939 curproxy->lbprm.arg_opt1 = 1;
Benoitaffb4812009-03-25 13:02:10 +01001940 }
Emeric Brun736aa232009-06-30 17:56:00 +02001941 }
1942 else if (!strncmp(args[0], "rdp-cookie", 10)) {
1943 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1944 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
1945
1946 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
1947 const char *beg, *end;
1948
1949 beg = args[0] + 11;
1950 end = strchr(beg, ')');
1951
1952 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001953 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001954 return -1;
1955 }
1956
Willy Tarreau484ff072019-01-14 15:28:53 +01001957 free(curproxy->lbprm.arg_str);
1958 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
1959 curproxy->lbprm.arg_len = end - beg;
Emeric Brun736aa232009-06-30 17:56:00 +02001960 }
1961 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
Willy Tarreau484ff072019-01-14 15:28:53 +01001962 free(curproxy->lbprm.arg_str);
1963 curproxy->lbprm.arg_str = strdup("mstshash");
1964 curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str);
Emeric Brun736aa232009-06-30 17:56:00 +02001965 }
1966 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001967 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001968 return -1;
1969 }
Willy Tarreau01732802007-11-01 22:48:15 +01001970 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001971 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001972 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 +01001973 return -1;
1974 }
1975 return 0;
1976}
1977
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001978
1979/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01001980/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001981/************************************************************************/
1982
Willy Tarreau34db1082012-04-19 17:16:54 +02001983/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001984 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001985 * undefined behaviour.
1986 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001987static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001988smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001989{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001990 struct proxy *px;
1991
Willy Tarreau37406352012-04-23 16:16:37 +02001992 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001993 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02001994 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001995
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01001996 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001997
1998 return 1;
1999}
2000
Willy Tarreau37406352012-04-23 16:16:37 +02002001/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002002 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02002003 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2004 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002005 */
2006static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002007smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002008{
Willy Tarreau24e32d82012-04-23 23:55:44 +02002009 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +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_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02002013 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
2014 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002015 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002016 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002017 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002018 return 1;
2019}
2020
Willy Tarreau34db1082012-04-19 17:16:54 +02002021/* set temp integer to the number of enabled servers on the proxy.
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.
2024 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002025static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002026smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002027{
2028 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02002029
Willy Tarreau37406352012-04-23 16:16:37 +02002030 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002031 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002032 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002033
Willy Tarreau24e32d82012-04-23 23:55:44 +02002034 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02002035 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002036 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002037
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002038 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01002039 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002040 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002041 return 1;
2042 }
2043
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002044 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02002045 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002046 }
2047
2048 return 1;
2049}
2050
Willy Tarreaua5e37562011-12-16 17:06:15 +01002051/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002052static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002053smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002054{
Willy Tarreaube508f12016-03-10 11:47:01 +01002055 if (!smp->strm)
2056 return 0;
2057
Willy Tarreauf853c462012-04-23 18:53:56 +02002058 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002059 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002060 smp->data.u.sint = smp->strm->be->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002061 return 1;
2062}
2063
Marcin Deranekd2471c22016-12-12 14:08:05 +01002064/* set string to the name of the backend */
2065static int
2066smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2067{
2068 if (!smp->strm)
2069 return 0;
2070
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002071 smp->data.u.str.area = (char *)smp->strm->be->id;
2072 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002073 return 0;
2074
2075 smp->data.type = SMP_T_STR;
2076 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002077 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01002078
2079 return 1;
2080}
2081
Willy Tarreaua5e37562011-12-16 17:06:15 +01002082/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002083static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002084smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002085{
Willy Tarreaube508f12016-03-10 11:47:01 +01002086 if (!smp->strm)
2087 return 0;
2088
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002089 if (!objt_server(smp->strm->target))
Willy Tarreau17af4192011-02-23 14:27:06 +01002090 return 0;
2091
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002092 smp->data.type = SMP_T_SINT;
Willy Tarreau1e582e52018-09-20 11:29:28 +02002093 smp->data.u.sint = __objt_server(smp->strm->target)->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002094
2095 return 1;
2096}
2097
Willy Tarreau34db1082012-04-19 17:16:54 +02002098/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002099 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002100 * undefined behaviour.
2101 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002102static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002103smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002104{
Willy Tarreau37406352012-04-23 16:16:37 +02002105 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.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002108 return 1;
2109}
2110
Willy Tarreau34db1082012-04-19 17:16:54 +02002111/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002112 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002113 * undefined behaviour.
2114 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002115static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002116smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002117{
Willy Tarreau37406352012-04-23 16:16:37 +02002118 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002119 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002120 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02002121 return 1;
2122}
2123
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002124/* set temp integer to the number of available connections across available
2125 * servers on the backend.
2126 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
2127 * undefined behaviour.
2128 */
2129static int
2130smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2131{
2132 struct server *iterator;
2133 struct proxy *px;
2134 unsigned int maxconn;
2135
2136 smp->flags = SMP_F_VOL_TEST;
2137 smp->data.type = SMP_T_SINT;
2138 smp->data.u.sint = 0;
2139
2140 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
2141 if (iterator->cur_state == SRV_ST_STOPPED)
2142 continue;
2143
2144 px = iterator->proxy;
2145 if (!srv_currently_usable(iterator) ||
2146 ((iterator->flags & SRV_F_BACKUP) &&
2147 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
2148 continue;
2149
2150 if (iterator->maxconn == 0) {
2151 /* one active server is unlimited, return -1 */
2152 smp->data.u.sint = -1;
2153 return 1;
2154 }
2155
2156 maxconn = srv_dynamic_maxconn(iterator);
2157 if (maxconn > iterator->cur_sess)
2158 smp->data.u.sint += maxconn - iterator->cur_sess;
2159 }
2160
2161 return 1;
2162}
2163
Willy Tarreau34db1082012-04-19 17:16:54 +02002164/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002165 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002166 * undefined behaviour.
2167 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002168static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002169smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002170{
Willy Tarreau37406352012-04-23 16:16:37 +02002171 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002172 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002173 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002174 return 1;
2175}
2176
Willy Tarreaua5e37562011-12-16 17:06:15 +01002177/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002178 * by the number of running servers and rounded up. If there is no running
2179 * server, we return twice the total, just as if we had half a running server.
2180 * This is more or less correct anyway, since we expect the last server to come
2181 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002182 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002183 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002184 */
2185static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002186smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002187{
2188 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002189 struct proxy *px;
Willy Tarreaua36af912009-10-10 12:02:45 +02002190
Willy Tarreau37406352012-04-23 16:16:37 +02002191 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002192 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002193 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002194
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002195 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002196
2197 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002198 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002199 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002200 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002201
2202 return 1;
2203}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002204
Willy Tarreau34db1082012-04-19 17:16:54 +02002205/* set temp integer to the number of concurrent connections on the server in the backend.
2206 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2207 * undefined behaviour.
2208 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002209static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002210smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002211{
Willy Tarreauf853c462012-04-23 18:53:56 +02002212 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002213 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002214 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002215 return 1;
2216}
2217
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002218/* set temp integer to the number of available connections on the server in the backend.
2219 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2220 * undefined behaviour.
2221 */
2222static int
2223smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2224{
2225 unsigned int maxconn;
2226
2227 smp->flags = SMP_F_VOL_TEST;
2228 smp->data.type = SMP_T_SINT;
2229
2230 if (args->data.srv->maxconn == 0) {
2231 /* one active server is unlimited, return -1 */
2232 smp->data.u.sint = -1;
2233 return 1;
2234 }
2235
2236 maxconn = srv_dynamic_maxconn(args->data.srv);
2237 if (maxconn > args->data.srv->cur_sess)
2238 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2239 else
2240 smp->data.u.sint = 0;
2241
2242 return 1;
2243}
2244
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002245/* set temp integer to the number of connections pending in the server's queue.
2246 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2247 * undefined behaviour.
2248 */
2249static int
2250smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2251{
2252 smp->flags = SMP_F_VOL_TEST;
2253 smp->data.type = SMP_T_SINT;
2254 smp->data.u.sint = args->data.srv->nbpend;
2255 return 1;
2256}
2257
Tait Clarridge7896d522012-12-05 21:39:31 -05002258/* set temp integer to the number of enabled servers on the proxy.
2259 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2260 * undefined behaviour.
2261 */
2262static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002263smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002264{
2265 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002266 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002267 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002268 return 1;
2269}
2270
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002271static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2272{
2273
2274 struct proxy *px;
2275
2276 if (!smp_make_safe(smp))
2277 return 0;
2278
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002279 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002280 if (!px)
2281 return 0;
2282
2283 smp->data.type = SMP_T_SINT;
2284 smp->data.u.sint = be_usable_srv(px);
2285
2286 return 1;
2287}
2288
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002289
2290/* Note: must not be declared <const> as its list will be overwritten.
2291 * Please take care of keeping this list alphabetically sorted.
2292 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002293static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002294 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2295 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002296 { "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 +02002297 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002298 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002299 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2300 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2301 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2302 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2303 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002304 { "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 +02002305 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002306 { "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 +02002307 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002308 { "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 +01002309 { /* END */ },
2310}};
2311
Willy Tarreau0108d902018-11-25 19:14:37 +01002312INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2313
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002314/* Note: must not be declared <const> as its list will be overwritten */
2315static struct sample_conv_kw_list sample_conv_kws = {ILH, {
2316 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2317 { /* END */ },
2318}};
2319
Willy Tarreau0108d902018-11-25 19:14:37 +01002320INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002321
Willy Tarreau61612d42012-04-19 18:42:05 +02002322/* Note: must not be declared <const> as its list will be overwritten.
2323 * Please take care of keeping this list alphabetically sorted.
2324 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002325static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002326 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002327}};
2328
Willy Tarreau0108d902018-11-25 19:14:37 +01002329INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002330
Willy Tarreaubaaee002006-06-26 02:48:02 +02002331/*
2332 * Local variables:
2333 * c-indent-level: 8
2334 * c-basic-offset: 8
2335 * End:
2336 */