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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>
Willy Tarreaubaaee002006-06-26 02:48:02 +020051#include <proto/proto_http.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;
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100324 unsigned int plen = px->lbprm.arg_len;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100325 unsigned long len;
326 const char *params, *p, *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200327
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100328 if (px->lbprm.tot_weight == 0)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200329 return NULL;
330
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100331 if (!IS_HTX_STRM(s)) {
332 struct http_txn *txn = s->txn;
333 struct http_msg *msg = &txn->req;
Willy Tarreauf69d4ff2015-05-02 00:05:47 +0200334
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100335 len = http_body_bytes(msg);
336 p = params = c_ptr(req, -http_data_rewind(msg));
337
338 if (len == 0)
339 return NULL;
340 if (len > b_wrap(&req->buf) - p)
341 len = b_wrap(&req->buf) - p;
342
343 }
344 else {
345 struct htx *htx = htxbuf(&req->buf);
346 struct htx_blk *blk;
347
348 p = params = NULL;
349 len = 0;
Christopher Fauleta3f15502019-05-13 15:27:23 +0200350 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100351 enum htx_blk_type type = htx_get_blk_type(blk);
352 struct ist v;
353
354 if (type != HTX_BLK_DATA)
355 continue;
356 v = htx_get_blk_value(htx, blk);
357 p = params = v.ptr;
358 len = v.len;
359 break;
360 }
361 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200362
363 while (len > plen) {
364 /* Look for the parameter name followed by an equal symbol */
365 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100366 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200367 /* OK, we have the parameter here at <params>, and
368 * the value after the equal sign, at <p>
369 * skip the equal symbol
370 */
371 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400372 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200373 len -= plen + 1;
374
Bhaskar98634f02013-10-29 23:30:51 -0400375 while (len && *end != '&') {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200376 if (unlikely(!HTTP_IS_TOKEN(*p))) {
Willy Tarreau157dd632009-12-06 19:18:09 +0100377 /* if in a POST, body must be URI encoded or it's not a URI.
Bhaskar98634f02013-10-29 23:30:51 -0400378 * Do not interpret any possible binary data as a parameter.
Willy Tarreau157dd632009-12-06 19:18:09 +0100379 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200380 if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */
381 break;
382 return NULL; /* oh, no; this is not uri-encoded.
383 * This body does not contain parameters.
384 */
385 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200386 len--;
Bhaskar98634f02013-10-29 23:30:51 -0400387 end++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200388 /* should we break if vlen exceeds limit? */
389 }
Bhaskar98634f02013-10-29 23:30:51 -0400390 hash = gen_hash(px, start, (end - start));
391
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500392 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100393 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400394
Willy Tarreau6c30be52019-01-14 17:07:39 +0100395 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100396 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200397 else
398 return map_get_server_hash(px, hash);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200399 }
400 }
Willy Tarreau01732802007-11-01 22:48:15 +0100401 /* skip to next parameter */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200402 p = memchr(params, '&', len);
Willy Tarreau01732802007-11-01 22:48:15 +0100403 if (!p)
404 return NULL;
405 p++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200406 len -= (p - params);
407 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100408 }
409 return NULL;
410}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200411
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200412
Willy Tarreaubaaee002006-06-26 02:48:02 +0200413/*
Benoitaffb4812009-03-25 13:02:10 +0100414 * This function tries to find a running server for the proxy <px> following
415 * the Header parameter hash method. It looks for a specific parameter in the
416 * URL and hashes it to compute the server ID. This is useful to optimize
417 * performance by avoiding bounces between servers in contexts where sessions
418 * are shared but cookies are not usable. If the parameter is not found, NULL
419 * is returned. If any server is found, it will be returned. If no valid server
Willy Tarreau9fed8582019-01-14 16:04:54 +0100420 * is found, NULL is returned. When lbprm.arg_opt1 is set, the hash will only
421 * apply to the middle part of a domain name ("use_domain_only" option).
Benoitaffb4812009-03-25 13:02:10 +0100422 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100423static struct server *get_server_hh(struct stream *s, const struct server *avoid)
Benoitaffb4812009-03-25 13:02:10 +0100424{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700425 unsigned int hash = 0;
Benoitaffb4812009-03-25 13:02:10 +0100426 struct proxy *px = s->be;
Willy Tarreau484ff072019-01-14 15:28:53 +0100427 unsigned int plen = px->lbprm.arg_len;
Benoitaffb4812009-03-25 13:02:10 +0100428 unsigned long len;
Benoitaffb4812009-03-25 13:02:10 +0100429 const char *p;
Bhaskar98634f02013-10-29 23:30:51 -0400430 const char *start, *end;
Benoitaffb4812009-03-25 13:02:10 +0100431
432 /* tot_weight appears to mean srv_count */
433 if (px->lbprm.tot_weight == 0)
434 return NULL;
435
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200436 /* note: we won't hash if there's only one server left */
437 if (px->lbprm.tot_used == 1)
438 goto hash_done;
439
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100440 if (!IS_HTX_STRM(s)) {
441 struct http_txn *txn = s->txn;
442 struct hdr_ctx ctx = { .idx = 0 };
443
444 /* if the message is chunked, we skip the chunk size, but use the value as len */
445 http_find_header2(px->lbprm.arg_str, plen, c_ptr(&s->req, -http_hdr_rewind(&txn->req)),
446 &txn->hdr_idx, &ctx);
447
448 /* if the header is not found or empty, let's fallback to round robin */
449 if (!ctx.idx || !ctx.vlen)
450 return NULL;
451
452 /* Found the param_name in the headers.
453 * we will compute the hash based on this value ctx.val.
454 */
455 len = ctx.vlen;
456 p = (char *)ctx.line + ctx.val;
457 }
458 else {
459 struct htx *htx = htxbuf(&s->req.buf);
460 struct http_hdr_ctx ctx = { .blk = NULL };
461
462 http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0);
463
464 /* if the header is not found or empty, let's fallback to round robin */
465 if (!ctx.blk || !ctx.value.len)
466 return NULL;
467
468 /* Found a the param_name in the headers.
469 * we will compute the hash based on this value ctx.val.
470 */
471 len = ctx.value.len;
472 p = ctx.value.ptr;
473 }
474
Willy Tarreau9fed8582019-01-14 16:04:54 +0100475 if (!px->lbprm.arg_opt1) {
Bhaskar98634f02013-10-29 23:30:51 -0400476 hash = gen_hash(px, p, len);
Benoitaffb4812009-03-25 13:02:10 +0100477 } else {
478 int dohash = 0;
Cyril Bontéf607d812015-01-04 15:17:36 +0100479 p += len;
Benoitaffb4812009-03-25 13:02:10 +0100480 /* special computation, use only main domain name, not tld/host
481 * going back from the end of string, start hashing at first
482 * dot stop at next.
483 * This is designed to work with the 'Host' header, and requires
484 * a special option to activate this.
485 */
Cyril Bontéf607d812015-01-04 15:17:36 +0100486 end = p;
Benoitaffb4812009-03-25 13:02:10 +0100487 while (len) {
Cyril Bontéf607d812015-01-04 15:17:36 +0100488 if (dohash) {
489 /* Rewind the pointer until the previous char
490 * is a dot, this will allow to set the start
491 * position of the domain. */
492 if (*(p - 1) == '.')
Benoitaffb4812009-03-25 13:02:10 +0100493 break;
Benoitaffb4812009-03-25 13:02:10 +0100494 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100495 else if (*p == '.') {
496 /* The pointer is rewinded to the dot before the
497 * tld, we memorize the end of the domain and
498 * can enter the domain processing. */
499 end = p;
500 dohash = 1;
501 }
Benoitaffb4812009-03-25 13:02:10 +0100502 p--;
Cyril Bontéf607d812015-01-04 15:17:36 +0100503 len--;
Benoitaffb4812009-03-25 13:02:10 +0100504 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100505 start = p;
Bhaskar98634f02013-10-29 23:30:51 -0400506 hash = gen_hash(px, start, (end - start));
Benoitaffb4812009-03-25 13:02:10 +0100507 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500508 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100509 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200510 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100511 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100512 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200513 else
514 return map_get_server_hash(px, hash);
Benoitaffb4812009-03-25 13:02:10 +0100515}
516
Willy Tarreau34db1082012-04-19 17:16:54 +0200517/* RDP Cookie HASH. */
Willy Tarreau59884a62019-01-02 14:48:31 +0100518static struct server *get_server_rch(struct stream *s, const struct server *avoid)
Emeric Brun736aa232009-06-30 17:56:00 +0200519{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700520 unsigned int hash = 0;
Emeric Brun736aa232009-06-30 17:56:00 +0200521 struct proxy *px = s->be;
522 unsigned long len;
Emeric Brun736aa232009-06-30 17:56:00 +0200523 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +0200524 struct sample smp;
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200525 int rewind;
Emeric Brun736aa232009-06-30 17:56:00 +0200526
527 /* tot_weight appears to mean srv_count */
528 if (px->lbprm.tot_weight == 0)
529 return NULL;
530
Willy Tarreau37406352012-04-23 16:16:37 +0200531 memset(&smp, 0, sizeof(smp));
Emeric Brun736aa232009-06-30 17:56:00 +0200532
Willy Tarreau6a445eb2018-06-19 07:04:45 +0200533 rewind = co_data(&s->req);
534 c_rew(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200535
Willy Tarreau484ff072019-01-14 15:28:53 +0100536 ret = fetch_rdp_cookie_name(s, &smp, px->lbprm.arg_str, px->lbprm.arg_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200537 len = smp.data.u.str.data;
Willy Tarreau664092c2011-12-16 19:11:42 +0100538
Willy Tarreaubcbd3932018-06-06 07:13:22 +0200539 c_adv(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200540
Willy Tarreau37406352012-04-23 16:16:37 +0200541 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0)
Emeric Brun736aa232009-06-30 17:56:00 +0200542 return NULL;
543
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200544 /* note: we won't hash if there's only one server left */
545 if (px->lbprm.tot_used == 1)
546 goto hash_done;
547
Willy Tarreau484ff072019-01-14 15:28:53 +0100548 /* Found the param_name in the headers.
Emeric Brun736aa232009-06-30 17:56:00 +0200549 * we will compute the hash based on this value ctx.val.
550 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200551 hash = gen_hash(px, smp.data.u.str.area, len);
Bhaskar98634f02013-10-29 23:30:51 -0400552
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500553 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100554 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200555 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100556 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100557 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200558 else
559 return map_get_server_hash(px, hash);
Emeric Brun736aa232009-06-30 17:56:00 +0200560}
Christopher Faulet5b517552017-06-09 14:17:53 +0200561
Willy Tarreau760e81d2018-05-03 07:20:40 +0200562/* random value */
Willy Tarreau59884a62019-01-02 14:48:31 +0100563static struct server *get_server_rnd(struct stream *s, const struct server *avoid)
Willy Tarreau760e81d2018-05-03 07:20:40 +0200564{
565 unsigned int hash = 0;
566 struct proxy *px = s->be;
Willy Tarreau21c741a2019-01-14 18:14:27 +0100567 struct server *prev, *curr;
568 int draws = px->lbprm.arg_opt1; // number of draws
Willy Tarreau760e81d2018-05-03 07:20:40 +0200569
570 /* tot_weight appears to mean srv_count */
571 if (px->lbprm.tot_weight == 0)
572 return NULL;
573
Willy Tarreau21c741a2019-01-14 18:14:27 +0100574 curr = NULL;
575 do {
576 prev = curr;
Willy Tarreau511213f2020-03-08 17:31:39 +0100577 hash = ha_random32();
Willy Tarreau21c741a2019-01-14 18:14:27 +0100578 curr = chash_get_server_hash(px, hash, avoid);
579 if (!curr)
580 break;
581
582 /* compare the new server to the previous best choice and pick
583 * the one with the least currently served requests.
584 */
585 if (prev && prev != curr &&
586 curr->served * prev->cur_eweight > prev->served * curr->cur_eweight)
587 curr = prev;
588 } while (--draws > 0);
589
590 return curr;
Willy Tarreau760e81d2018-05-03 07:20:40 +0200591}
592
Benoitaffb4812009-03-25 13:02:10 +0100593/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200594 * This function applies the load-balancing algorithm to the stream, as
595 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200596 * 'assigned'.
597 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200598 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200599 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100600 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200601 * The function tries to keep the original connection slot if it reconnects to
602 * the same server, otherwise it releases it and tries to offer it.
603 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200604 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200605 *
606 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100607 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200608 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
609 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200610 * SRV_STATUS_INTERNAL for other unrecoverable errors.
611 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200612 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100613 * it does not need to be called anymore. This means that target_srv(&s->target)
614 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200615 *
616 */
617
Willy Tarreau87b09662015-04-03 00:22:06 +0200618int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200619{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100620 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200621 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100622 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200623 int err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100624
Simon Horman8effd3d2011-08-13 08:03:52 +0900625 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200626
Willy Tarreau7c669d72008-06-20 15:04:11 +0200627 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200628 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200629 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100630
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100631 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200632 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200633
Willy Tarreau7c669d72008-06-20 15:04:11 +0200634 /* We have to release any connection slot before applying any LB algo,
635 * otherwise we may erroneously end up with no available slot.
636 */
637 if (conn_slot)
638 sess_change_server(s, NULL);
639
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100640 /* We will now try to find the good server and store it into <objt_server(s->target)>.
641 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200642 * as well as if no server is available (check error code).
643 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100644
Willy Tarreau827aee92011-03-10 16:55:02 +0100645 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100646 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100647
Olivier Houchardba4fff52018-12-01 14:40:40 +0100648 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200649 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100650 (s->be->options & PR_O_PREF_LAST))) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100651 struct sess_srv_list *srv_list;
652 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
653 struct server *tmpsrv = objt_server(srv_list->target);
Olivier Houchardba4fff52018-12-01 14:40:40 +0100654
655 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200656 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100657 (!s->be->max_ka_queue ||
658 server_has_room(tmpsrv) || (
659 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
660 srv_currently_usable(tmpsrv)) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100661 list_for_each_entry(conn, &srv_list->conn_list, session_list) {
Olivier Houchardba4fff52018-12-01 14:40:40 +0100662 if (conn->flags & CO_FL_CONNECTED) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100663
Olivier Houchardba4fff52018-12-01 14:40:40 +0100664 srv = tmpsrv;
665 s->target = &srv->obj_type;
666 goto out_ok;
667 }
668 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100669 }
670 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100671 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100672 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200673
Willy Tarreau7c669d72008-06-20 15:04:11 +0200674 /* we must check if we have at least one server available */
675 if (!s->be->lbprm.tot_weight) {
676 err = SRV_STATUS_NOSRV;
677 goto out;
678 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200679
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200680 /* First check whether we need to fetch some data or simply call
681 * the LB lookup function. Only the hashing functions will need
682 * some input data in fact, and will support multiple algorithms.
683 */
684 switch (s->be->lbprm.algo & BE_LB_LKUP) {
685 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100686 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200687 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200688
Willy Tarreauf09c6602012-02-13 17:12:08 +0100689 case BE_LB_LKUP_FSTREE:
690 srv = fas_get_next_server(s->be, prev_srv);
691 break;
692
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200693 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100694 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200695 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200696
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200697 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200698 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200699 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200700 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
Willy Tarreau59884a62019-01-02 14:48:31 +0100701 srv = get_server_rnd(s, prev_srv);
Willy Tarreau6c30be52019-01-14 17:07:39 +0100702 else if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100703 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200704 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100705 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200706 break;
707 }
708 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200709 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200710 err = SRV_STATUS_INTERNAL;
711 goto out;
712 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200713
714 switch (s->be->lbprm.algo & BE_LB_PARM) {
715 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200716 conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200717 if (conn && conn->addr.from.ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200718 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200719 (void *)&((struct sockaddr_in *)&conn->addr.from)->sin_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100720 4, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200721 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200722 else if (conn && conn->addr.from.ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200723 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200724 (void *)&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100725 16, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200726 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200727 else {
728 /* unknown IP family */
729 err = SRV_STATUS_INTERNAL;
730 goto out;
731 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200732 break;
733
734 case BE_LB_HASH_URI:
735 /* URI hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200736 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100737 break;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100738 if (!IS_HTX_STRM(s))
739 srv = get_server_uh(s->be,
740 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
741 s->txn->req.sl.rq.u_l, prev_srv);
742 else {
743 struct ist uri;
744
Christopher Faulet297fbb42019-05-13 14:41:27 +0200745 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100746 srv = get_server_uh(s->be, uri.ptr, uri.len, prev_srv);
747 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200748 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200749
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200750 case BE_LB_HASH_PRM:
751 /* URL Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200752 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100753 break;
Willy Tarreau61a21a32011-03-01 20:35:49 +0100754
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100755 if (!IS_HTX_STRM(s))
756 srv = get_server_ph(s->be,
757 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
758 s->txn->req.sl.rq.u_l, prev_srv);
759 else {
760 struct ist uri;
761
Christopher Faulet297fbb42019-05-13 14:41:27 +0200762 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100763 srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv);
764 }
Willy Tarreau61a21a32011-03-01 20:35:49 +0100765
Willy Tarreaueee5b512015-04-03 23:46:31 +0200766 if (!srv && s->txn->meth == HTTP_METH_POST)
Willy Tarreau59884a62019-01-02 14:48:31 +0100767 srv = get_server_ph_post(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200768 break;
Benoitaffb4812009-03-25 13:02:10 +0100769
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200770 case BE_LB_HASH_HDR:
771 /* Header Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200772 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100773 break;
Willy Tarreau59884a62019-01-02 14:48:31 +0100774 srv = get_server_hh(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200775 break;
776
777 case BE_LB_HASH_RDP:
778 /* RDP Cookie hashing */
Willy Tarreau59884a62019-01-02 14:48:31 +0100779 srv = get_server_rch(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200780 break;
781
782 default:
783 /* unknown balancing algorithm */
784 err = SRV_STATUS_INTERNAL;
785 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100786 }
Emeric Brun736aa232009-06-30 17:56:00 +0200787
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200788 /* If the hashing parameter was not found, let's fall
789 * back to round robin on the map.
790 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100791 if (!srv) {
Willy Tarreau6c30be52019-01-14 17:07:39 +0100792 if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100793 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200794 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100795 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200796 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200797
798 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200799 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200800
Willy Tarreau7c669d72008-06-20 15:04:11 +0200801 default:
802 /* unknown balancing algorithm */
803 err = SRV_STATUS_INTERNAL;
804 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200805 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200806
Willy Tarreau827aee92011-03-10 16:55:02 +0100807 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200808 err = SRV_STATUS_FULL;
809 goto out;
810 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100811 else if (srv != prev_srv) {
Olivier Houchard237f7812019-03-08 18:49:07 +0100812 _HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
813 _HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100814 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100815 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200816 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200817 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100818 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200819 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100820 else if ((s->be->options & PR_O_HTTP_PROXY)) {
821 conn = cs_conn(objt_cs(s->si[1].end));
822
823 if (conn && is_addr(&conn->addr.to)) {
824 /* in proxy mode, we need a valid destination address */
825 s->target = &s->be->obj_type;
826 } else {
827 err = SRV_STATUS_NOSRV;
828 goto out;
829 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100830 }
831 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200832 err = SRV_STATUS_NOSRV;
833 goto out;
834 }
835
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100836out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200837 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200838 err = SRV_STATUS_OK;
839 out:
840
841 /* Either we take back our connection slot, or we offer it to someone
842 * else if we don't need it anymore.
843 */
844 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100845 if (conn_slot == srv) {
846 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200847 } else {
848 if (may_dequeue_tasks(conn_slot, s->be))
849 process_srv_queue(conn_slot);
850 }
851 }
852
853 out_err:
854 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200855}
856
Willy Tarreaubaaee002006-06-26 02:48:02 +0200857/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200858 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200859 * The address is taken from the currently assigned server, or from the
860 * dispatch or transparent address.
861 *
862 * It may return :
863 * SRV_STATUS_OK if everything is OK.
864 * SRV_STATUS_INTERNAL for other unrecoverable errors.
865 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200866 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200867 * not cleared, so it's to the caller to clear it if required.
868 *
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200869 * The caller is responsible for having already assigned a connection
870 * to si->end.
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200871 *
Willy Tarreaubaaee002006-06-26 02:48:02 +0200872 */
Olivier Houchard201b9f42018-11-21 00:16:29 +0100873int assign_server_address(struct stream *s, struct connection *srv_conn)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200874{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200875 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200876
Christopher Faulet56803b12017-11-24 16:06:18 +0100877 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200878
Willy Tarreaue7dff022015-04-03 01:14:29 +0200879 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200880 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200881 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200882 return SRV_STATUS_INTERNAL;
883
Willy Tarreau1e582e52018-09-20 11:29:28 +0200884 srv_conn->addr.to = __objt_server(s->target)->addr;
885 set_host_port(&srv_conn->addr.to, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200886
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200887 if (!is_addr(&srv_conn->addr.to) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200888 /* if the server has no address, we use the same address
889 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200890 * locally on multiple addresses at once. Nothing is done
891 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200892 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200893 conn_get_to_addr(cli_conn);
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200894
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200895 if (cli_conn->addr.to.ss_family == AF_INET) {
896 ((struct sockaddr_in *)&srv_conn->addr.to)->sin_addr = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
897 } else if (cli_conn->addr.to.ss_family == AF_INET6) {
898 ((struct sockaddr_in6 *)&srv_conn->addr.to)->sin6_addr = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Emeric Brunec810d12010-10-22 16:36:33 +0200899 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200900 }
901
Willy Tarreaubaaee002006-06-26 02:48:02 +0200902 /* if this server remaps proxied ports, we'll use
903 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +0200904 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +0100905 int base_port;
906
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200907 conn_get_to_addr(cli_conn);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100908
909 /* First, retrieve the port from the incoming connection */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200910 base_port = get_host_port(&cli_conn->addr.to);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100911
912 /* Second, assign the outgoing connection's port */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200913 base_port += get_host_port(&srv_conn->addr.to);
914 set_host_port(&srv_conn->addr.to, base_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200915 }
916 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200917 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200918 /* connect to the defined dispatch addr */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200919 srv_conn->addr.to = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200920 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200921 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200922 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200923 conn_get_to_addr(cli_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200924
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200925 if (cli_conn->addr.to.ss_family == AF_INET || cli_conn->addr.to.ss_family == AF_INET6)
926 srv_conn->addr.to = cli_conn->addr.to;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200927 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100928 else if (s->be->options & PR_O_HTTP_PROXY) {
929 /* If HTTP PROXY option is set, then server is already assigned
930 * during incoming client request parsing. */
931 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +0100932 else {
933 /* no server and no LB algorithm ! */
934 return SRV_STATUS_INTERNAL;
935 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200936
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100937 /* Copy network namespace from client connection */
Thierry FOURNIERfe1ebcd2014-12-19 13:37:11 +0100938 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100939
Willy Tarreaue7dff022015-04-03 01:14:29 +0200940 s->flags |= SF_ADDR_SET;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200941 return SRV_STATUS_OK;
942}
943
Willy Tarreau87b09662015-04-03 00:22:06 +0200944/* This function assigns a server to stream <s> if required, and can add the
Willy Tarreaubaaee002006-06-26 02:48:02 +0200945 * connection to either the assigned server's queue or to the proxy's queue.
Willy Tarreau87b09662015-04-03 00:22:06 +0200946 * If ->srv_conn is set, the stream is first released from the server.
Willy Tarreaue7dff022015-04-03 01:14:29 +0200947 * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will
Willy Tarreau7c669d72008-06-20 15:04:11 +0200948 * be called before any connection and after any retry or redispatch occurs.
949 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200950 * It is not allowed to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200951 *
952 * Returns :
953 *
954 * SRV_STATUS_OK if everything is OK.
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100955 * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200956 * SRV_STATUS_QUEUED if the connection has been queued.
957 * SRV_STATUS_FULL if the server(s) is/are saturated and the
Willy Tarreau827aee92011-03-10 16:55:02 +0100958 * connection could not be queued at the server's,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200959 * which may be NULL if we queue on the backend.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200960 * SRV_STATUS_INTERNAL for other unrecoverable errors.
961 *
962 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200963int assign_server_and_queue(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200964{
965 struct pendconn *p;
Willy Tarreau827aee92011-03-10 16:55:02 +0100966 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200967 int err;
968
969 if (s->pend_pos)
970 return SRV_STATUS_INTERNAL;
971
Willy Tarreau7c669d72008-06-20 15:04:11 +0200972 err = SRV_STATUS_OK;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200973 if (!(s->flags & SF_ASSIGNED)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100974 struct server *prev_srv = objt_server(s->target);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100975
Willy Tarreau7c669d72008-06-20 15:04:11 +0200976 err = assign_server(s);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100977 if (prev_srv) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200978 /* This stream was previously assigned to a server. We have to
979 * update the stream's and the server's stats :
Willy Tarreau7c669d72008-06-20 15:04:11 +0200980 * - if the server changed :
981 * - set TX_CK_DOWN if txn.flags was TX_CK_VALID
Willy Tarreaue7dff022015-04-03 01:14:29 +0200982 * - set SF_REDISP if it was successfully redispatched
Willy Tarreau7c669d72008-06-20 15:04:11 +0200983 * - increment srv->redispatches and be->redispatches
984 * - if the server remained the same : update retries.
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100985 */
986
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100987 if (prev_srv != objt_server(s->target)) {
Willy Tarreaueee5b512015-04-03 23:46:31 +0200988 if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) {
989 s->txn->flags &= ~TX_CK_MASK;
990 s->txn->flags |= TX_CK_DOWN;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200991 }
Willy Tarreaue7dff022015-04-03 01:14:29 +0200992 s->flags |= SF_REDISP;
Olivier Houchard237f7812019-03-08 18:49:07 +0100993 _HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
994 _HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200995 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +0100996 _HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
997 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100998 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100999 }
1000 }
1001
Willy Tarreaubaaee002006-06-26 02:48:02 +02001002 switch (err) {
1003 case SRV_STATUS_OK:
Willy Tarreaue7dff022015-04-03 01:14:29 +02001004 /* we have SF_ASSIGNED set */
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001005 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001006 if (!srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001007 return SRV_STATUS_OK; /* dispatch or proxy mode */
1008
1009 /* If we already have a connection slot, no need to check any queue */
Willy Tarreau827aee92011-03-10 16:55:02 +01001010 if (s->srv_conn == srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001011 return SRV_STATUS_OK;
1012
Willy Tarreau87b09662015-04-03 00:22:06 +02001013 /* OK, this stream already has an assigned server, but no
Willy Tarreau7c669d72008-06-20 15:04:11 +02001014 * connection slot yet. Either it is a redispatch, or it was
1015 * assigned from persistence information (direct mode).
1016 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001017 if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) {
Willy Tarreau7c669d72008-06-20 15:04:11 +02001018 /* server scheduled for redirection, and already assigned. We
1019 * don't want to go further nor check the queue.
Willy Tarreau21d2af32008-02-14 20:25:24 +01001020 */
Willy Tarreau827aee92011-03-10 16:55:02 +01001021 sess_change_server(s, srv); /* not really needed in fact */
Willy Tarreau21d2af32008-02-14 20:25:24 +01001022 return SRV_STATUS_OK;
1023 }
1024
Willy Tarreau87b09662015-04-03 00:22:06 +02001025 /* We might have to queue this stream if the assigned server is full.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001026 * We know we have to queue it into the server's queue, so if a maxqueue
1027 * is set on the server, we must also check that the server's queue is
1028 * not full, in which case we have to return FULL.
1029 */
Willy Tarreau827aee92011-03-10 16:55:02 +01001030 if (srv->maxconn &&
1031 (srv->nbpend || srv->served >= srv_dynamic_maxconn(srv))) {
Willy Tarreau7c669d72008-06-20 15:04:11 +02001032
Willy Tarreau827aee92011-03-10 16:55:02 +01001033 if (srv->maxqueue > 0 && srv->nbpend >= srv->maxqueue)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001034 return SRV_STATUS_FULL;
1035
Willy Tarreaubaaee002006-06-26 02:48:02 +02001036 p = pendconn_add(s);
1037 if (p)
1038 return SRV_STATUS_QUEUED;
1039 else
Willy Tarreau7c669d72008-06-20 15:04:11 +02001040 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001041 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001042
1043 /* OK, we can use this server. Let's reserve our place */
Willy Tarreau827aee92011-03-10 16:55:02 +01001044 sess_change_server(s, srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001045 return SRV_STATUS_OK;
1046
1047 case SRV_STATUS_FULL:
Willy Tarreau87b09662015-04-03 00:22:06 +02001048 /* queue this stream into the proxy's queue */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001049 p = pendconn_add(s);
1050 if (p)
1051 return SRV_STATUS_QUEUED;
1052 else
Willy Tarreau7c669d72008-06-20 15:04:11 +02001053 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001054
1055 case SRV_STATUS_NOSRV:
Willy Tarreau7c669d72008-06-20 15:04:11 +02001056 return err;
1057
Willy Tarreaubaaee002006-06-26 02:48:02 +02001058 case SRV_STATUS_INTERNAL:
1059 return err;
Willy Tarreau7c669d72008-06-20 15:04:11 +02001060
Willy Tarreaubaaee002006-06-26 02:48:02 +02001061 default:
1062 return SRV_STATUS_INTERNAL;
1063 }
Willy Tarreau5b6995c2008-01-13 16:31:17 +01001064}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001065
Willy Tarreaub1d67742010-03-29 19:36:59 +02001066/* If an explicit source binding is specified on the server and/or backend, and
1067 * this source makes use of the transparent proxy, then it is extracted now and
Willy Tarreau87b09662015-04-03 00:22:06 +02001068 * assigned to the stream's pending connection. This function assumes that an
Willy Tarreau350f4872014-11-28 14:42:25 +01001069 * outgoing connection has already been assigned to s->si[1].end.
Willy Tarreaub1d67742010-03-29 19:36:59 +02001070 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001071static void assign_tproxy_address(struct stream *s)
Willy Tarreaub1d67742010-03-29 19:36:59 +02001072{
Willy Tarreau29fbe512015-08-20 19:35:14 +02001073#if defined(CONFIG_HAP_TRANSPARENT)
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001074 struct server *srv = objt_server(s->target);
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001075 struct conn_src *src;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001076 struct connection *cli_conn;
Olivier Houchard09a0f032019-01-17 15:59:13 +01001077 struct connection *srv_conn;
1078
1079 if (objt_cs(s->si[1].end))
1080 srv_conn = cs_conn(__objt_cs(s->si[1].end));
1081 else
1082 srv_conn = objt_conn(s->si[1].end);
Willy Tarreau827aee92011-03-10 16:55:02 +01001083
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001084 if (srv && srv->conn_src.opts & CO_SRC_BIND)
1085 src = &srv->conn_src;
1086 else if (s->be->conn_src.opts & CO_SRC_BIND)
1087 src = &s->be->conn_src;
1088 else
1089 return;
Willy Tarreau294c4732011-12-16 21:35:50 +01001090
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001091 switch (src->opts & CO_SRC_TPROXY_MASK) {
1092 case CO_SRC_TPROXY_ADDR:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001093 srv_conn->addr.from = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001094 break;
1095 case CO_SRC_TPROXY_CLI:
1096 case CO_SRC_TPROXY_CIP:
1097 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001098 cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001099 if (cli_conn)
1100 srv_conn->addr.from = cli_conn->addr.from;
1101 else
1102 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001103 break;
1104 case CO_SRC_TPROXY_DYN:
Willy Tarreaueee5b512015-04-03 23:46:31 +02001105 if (src->bind_hdr_occ && s->txn) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001106 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001107 size_t vlen;
Willy Tarreau294c4732011-12-16 21:35:50 +01001108
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001109 /* bind to the IP in a header */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001110 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_family = AF_INET;
1111 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_port = 0;
1112 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr = 0;
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001113 if (!IS_HTX_STRM(s)) {
1114 int rewind;
Willy Tarreau294c4732011-12-16 21:35:50 +01001115
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001116 c_rew(&s->req, rewind = http_hdr_rewind(&s->txn->req));
1117 if (http_get_hdr(&s->txn->req, src->bind_hdr_name, src->bind_hdr_len,
1118 &s->txn->hdr_idx, src->bind_hdr_occ, NULL, &vptr, &vlen)) {
1119 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
1120 htonl(inetaddr_host_lim(vptr, vptr + vlen));
1121 }
1122 c_adv(&s->req, rewind);
1123 }
1124 else {
1125 if (http_get_htx_hdr(htxbuf(&s->req.buf),
1126 ist2(src->bind_hdr_name, src->bind_hdr_len),
1127 src->bind_hdr_occ, NULL, &vptr, &vlen)) {
1128 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
1129 htonl(inetaddr_host_lim(vptr, vptr + vlen));
1130 }
Willy Tarreaubce70882009-09-07 11:51:47 +02001131 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001132 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001133 break;
1134 default:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001135 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreaub1d67742010-03-29 19:36:59 +02001136 }
1137#endif
1138}
1139
Lukas Tribusda95fd92018-11-25 13:21:27 +01001140#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001141/*
1142 * Pick the right mux once the connection is established, we should now have
Willy Tarreau94031d32018-12-19 14:36:29 +01001143 * an alpn if available, so we are now able to choose. In this specific case
1144 * the connection's context is &si[i].end.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001145 */
1146static int conn_complete_server(struct connection *conn)
1147{
1148 struct conn_stream *cs = NULL;
Willy Tarreau94031d32018-12-19 14:36:29 +01001149 struct stream *s = container_of(conn->ctx, struct stream, si[1].end);
Olivier Houchardbf024f02018-11-29 17:08:53 +01001150 struct server *srv;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001151
Olivier Houchard70d9b2f2018-11-29 16:57:32 +01001152 task_wakeup(s->task, TASK_WOKEN_IO);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001153 conn_clear_xprt_done_cb(conn);
1154 /* Verify if the connection just established. */
1155 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED))))
1156 conn->flags |= CO_FL_CONNECTED;
1157
Olivier Houchard201b9f42018-11-21 00:16:29 +01001158 if (conn->flags & CO_FL_ERROR)
1159 goto fail;
Olivier Houchardd76bd2d2018-11-29 16:58:49 +01001160 si_detach_endpoint(&s->si[1]);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001161 cs = si_alloc_cs(&s->si[1], conn);
1162 if (!cs)
1163 goto fail;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001164 if (conn_install_mux_be(conn, cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001165 goto fail;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001166 srv = objt_server(s->target);
Olivier Houchard7aec9ed2018-12-14 19:31:51 +01001167 if (srv && ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
Olivier Houchardbf024f02018-11-29 17:08:53 +01001168 conn->mux->avail_streams(conn) > 0)
1169 LIST_ADD(&srv->idle_conns[tid], &conn->list);
1170
Olivier Houchard201b9f42018-11-21 00:16:29 +01001171 return 0;
1172
1173fail:
Willy Tarreaud8220132019-01-28 16:33:35 +01001174 si_detach_endpoint(&s->si[1]);
1175
Olivier Houchard201b9f42018-11-21 00:16:29 +01001176 if (cs)
1177 cs_free(cs);
1178 /* kill the connection now */
1179 conn_stop_tracking(conn);
1180 conn_full_close(conn);
1181 conn_free(conn);
Olivier Houchard4f417512018-12-27 18:59:46 +01001182 /* Let process_stream know it went wrong */
1183 s->si[1].flags |= SI_FL_ERR;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001184 return -1;
1185}
Olivier Houchardc6e0bb42018-11-23 14:24:10 +01001186#endif
Olivier Houchard201b9f42018-11-21 00:16:29 +01001187
Willy Tarreaub1d67742010-03-29 19:36:59 +02001188
Willy Tarreaubaaee002006-06-26 02:48:02 +02001189/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001190 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001191 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001192 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001193 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001194 * - SF_ERR_NONE if everything's OK
1195 * - SF_ERR_SRVTO if there are no more servers
1196 * - SF_ERR_SRVCL if the connection was refused by the server
1197 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1198 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1199 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001200 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001201 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001202 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001203 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001204int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001205{
Olivier Houchard522eea72017-11-03 16:27:47 +01001206 struct connection *cli_conn = NULL;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001207 struct connection *srv_conn = NULL;
1208 struct connection *old_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001209 struct conn_stream *srv_cs = NULL;
Willy Tarreau827aee92011-03-10 16:55:02 +01001210 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001211 int reuse = 0;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001212 int reuse_orphan = 0;
Olivier Houchard5cd62172019-01-04 15:52:26 +01001213 int init_mux = 0;
Olivier Houchard4dc85532019-01-29 15:50:38 +01001214 int alloced_cs = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001215 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001216
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001217
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001218 /* Some, such as http_proxy and the LUA, create their connection and
1219 * conn_stream manually, so if we already have a conn_stream, try
1220 * to use it.
1221 */
1222 srv_cs = objt_cs(s->si[1].end);
Olivier Houchard9ef51552019-01-28 15:33:15 +01001223 if (!srv_cs)
1224 srv_conn = objt_conn(s->si[1].end);
1225 else
1226 srv_conn = cs_conn(srv_cs);
1227
1228 if (srv_conn) {
1229 if (!srv_conn->target || srv_conn->target == s->target) {
1230 srv_conn->flags &= ~(CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH);
1231 if (srv_cs)
Willy Tarreau7bb39d72019-06-03 14:23:33 +02001232 srv_cs->flags &= ~(CS_FL_ERROR | CS_FL_EOS);
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001233 reuse = 1;
Olivier Houchard9ef51552019-01-28 15:33:15 +01001234 old_conn = srv_conn;
1235 } else {
1236 srv_conn = NULL;
Olivier Houcharda9da4672019-07-08 16:30:32 +02001237 srv_cs = NULL;
Olivier Houchard9ef51552019-01-28 15:33:15 +01001238 si_release_endpoint(&s->si[1]);
Olivier Houchardac1ce6f2018-12-08 19:08:48 +01001239 }
Olivier Houchard9ef51552019-01-28 15:33:15 +01001240 }
1241
1242 if (!old_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001243 struct sess_srv_list *srv_list;
1244 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
1245 if (srv_list->target == s->target) {
1246 list_for_each_entry(srv_conn, &srv_list->conn_list,
Olivier Houchard2442f682018-12-01 17:03:38 +01001247 session_list) {
1248 if (conn_xprt_ready(srv_conn) &&
1249 srv_conn->mux && (srv_conn->mux->avail_streams(srv_conn) > 0)) {
1250 reuse = 1;
1251 break;
1252 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001253 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001254 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001255 }
1256 }
Olivier Houchardc3fa6382018-12-27 15:29:53 +01001257 if (reuse == 0) {
1258 srv_conn = NULL;
Olivier Houchard351411f2018-12-27 17:20:54 +01001259 if (!LIST_ISEMPTY(&s->sess->srv_list)) {
1260 srv_list = LIST_ELEM(s->sess->srv_list.n,
1261 struct sess_srv_list *, srv_list);
1262 if (!LIST_ISEMPTY(&srv_list->conn_list))
1263 srv_conn = LIST_ELEM(srv_list->conn_list.n,
1264 struct connection *, session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001265 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001266
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001267 }
1268 }
1269 old_conn = srv_conn;
1270
Willy Tarreau7b004922015-08-04 19:34:21 +02001271 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001272
Willy Tarreau8dff9982015-08-04 20:45:52 +02001273 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001274 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001275
Willy Tarreau449d74a2015-08-05 17:16:33 +02001276 /* Below we pick connections from the safe or idle lists based
1277 * on the strategy, the fact that this is a first or second
1278 * (retryable) request, with the indicated priority (1 or 2) :
1279 *
1280 * SAFE AGGR ALWS
1281 *
1282 * +-----+-----+ +-----+-----+ +-----+-----+
1283 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1284 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1285 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1286 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1287 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1288 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1289 */
Christopher Faulet40a007c2017-07-03 15:41:01 +02001290 if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001291 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1292 s->txn && (s->txn->flags & TX_NOT_FIRST))) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001293 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001294 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001295 else if (srv->safe_conns && !LIST_ISEMPTY(&srv->safe_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001296 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1297 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR)) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001298 srv_conn = LIST_ELEM(srv->safe_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001299 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001300 else if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001301 (s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001302 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001303 } else if (srv->idle_orphan_conns && !LIST_ISEMPTY(&srv->idle_orphan_conns[tid]) &&
1304 (((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) ||
1305 (((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
1306 s->txn && (s->txn->flags & TX_NOT_FIRST)))) {
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001307 srv_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
Willy Tarreauc912f942019-02-28 16:06:56 +01001308 struct connection *, list);
1309 if (srv_conn)
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001310 reuse_orphan = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001311 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001312
Willy Tarreau449d74a2015-08-05 17:16:33 +02001313 /* If we've picked a connection from the pool, we now have to
1314 * detach it. We may have to get rid of the previous idle
1315 * connection we had, so for this we try to swap it with the
1316 * other owner's. That way it may remain alive for others to
1317 * pick.
1318 */
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001319 if (srv_conn)
Willy Tarreau8dff9982015-08-04 20:45:52 +02001320 reuse = 1;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001321 }
1322
Willy Tarreau34601a82013-12-15 16:33:46 +01001323 if (reuse) {
1324 /* Disable connection reuse if a dynamic source is used.
1325 * As long as we don't share connections between servers,
1326 * we don't need to disable connection reuse on no-idempotent
1327 * requests nor when PROXY protocol is used.
1328 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001329 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1330 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1331 reuse = 0;
1332 }
1333 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1334 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1335 reuse = 0;
1336 }
1337 }
Olivier Houchard14fcc2e2019-06-05 13:55:01 +02001338 if (((!reuse || (srv_conn && !(srv_conn->flags & CO_FL_CONNECTED)))
Christopher Faulet88e47652019-09-13 10:01:36 +02001339 && ha_used_fds > global.tune.pool_high_count) && srv && srv->idle_orphan_conns) {
Olivier Houchard88698d92019-04-16 19:07:22 +02001340 struct connection *tokill_conn;
1341
1342 /* We can't reuse a connection, and e have more FDs than deemd
1343 * acceptable, attempt to kill an idling connection
1344 */
1345 /* First, try from our own idle list */
1346 tokill_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
1347 struct connection *, list);
1348 if (tokill_conn)
1349 tokill_conn->mux->destroy(tokill_conn->ctx);
1350 /* If not, iterate over other thread's idling pool, and try to grab one */
1351 else {
1352 int i;
1353
1354 for (i = 0; i < global.nbthread; i++) {
1355 if (i == tid)
1356 continue;
Willy Tarreau08e2b412019-05-26 11:50:08 +02001357
1358 // just silence stupid gcc which reports an absurd
1359 // out-of-bounds warning for <i> which is always
1360 // exactly zero without threads, but it seems to
1361 // see it possibly larger.
1362 ALREADY_CHECKED(i);
1363
Olivier Houchard7fcbd372019-12-30 18:15:40 +01001364 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
Olivier Houchard88698d92019-04-16 19:07:22 +02001365 tokill_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[i],
1366 struct connection *, list);
1367 if (tokill_conn) {
1368 /* We got one, put it into the concerned thread's to kill list, and wake it's kill task */
1369
1370 LIST_ADDQ_LOCKED(&toremove_connections[i],
1371 &tokill_conn->list);
1372 task_wakeup(idle_conn_cleanup[i], TASK_WOKEN_OTHER);
Olivier Houchardf77ca892020-01-31 17:22:08 +01001373 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
Olivier Houchard88698d92019-04-16 19:07:22 +02001374 break;
1375 }
Olivier Houchard7fcbd372019-12-30 18:15:40 +01001376 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
Olivier Houchard88698d92019-04-16 19:07:22 +02001377 }
1378 }
1379
1380 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001381 /* If we're really reusing the connection, remove it from the orphan
1382 * list and add it back to the idle list.
1383 */
Christopher Faulet46451d62019-04-19 15:39:22 +02001384 if (reuse) {
1385 if (reuse_orphan) {
1386 srv_conn->idle_time = 0;
1387 _HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
1388 __ha_barrier_atomic_store();
1389 srv->curr_idle_thr[tid]--;
1390 LIST_ADDQ(&srv->idle_conns[tid], &srv_conn->list);
1391 }
1392 else {
1393 if (srv_conn->flags & CO_FL_SESS_IDLE) {
1394 struct session *sess = srv_conn->owner;
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001395
Christopher Faulet46451d62019-04-19 15:39:22 +02001396 srv_conn->flags &= ~CO_FL_SESS_IDLE;
1397 sess->idle_conns--;
1398 }
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001399 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001400 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001401
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001402 /* We're about to use another connection, let the mux know we're
1403 * done with this one
1404 */
Olivier Houchardc685d702018-12-28 16:20:25 +01001405 if (old_conn != srv_conn && old_conn && reuse && !reuse_orphan) {
1406 struct session *sess = srv_conn->owner;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001407
Olivier Houchardc685d702018-12-28 16:20:25 +01001408 if (sess) {
1409 if (old_conn && !(old_conn->flags & CO_FL_PRIVATE) &&
1410 old_conn->mux != NULL) {
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001411 if (old_conn->flags & CO_FL_SESS_IDLE)
1412 s->sess->idle_conns--;
Olivier Houchardc685d702018-12-28 16:20:25 +01001413 session_unown_conn(s->sess, old_conn);
1414 old_conn->owner = sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001415 if (!session_add_conn(sess, old_conn, old_conn->target)) {
Olivier Houcharda48237f2019-05-02 12:04:15 +02001416 old_conn->flags &= ~CO_FL_SESS_IDLE;
Olivier Houchardc685d702018-12-28 16:20:25 +01001417 old_conn->owner = NULL;
Christopher Faulet73c12072019-04-08 11:23:22 +02001418 old_conn->mux->destroy(old_conn->ctx);
Olivier Houchardc685d702018-12-28 16:20:25 +01001419 } else
1420 session_check_idle_conn(sess, old_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001421 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001422 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001423 }
1424
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001425 if (reuse) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001426 /* We already created a cs earlier when using http_proxy, so
1427 * only create a new one if we don't have one already.
1428 */
Olivier Houchard9ef51552019-01-28 15:33:15 +01001429 if (!srv_cs && srv_conn->mux) {
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001430 int avail = srv_conn->mux->avail_streams(srv_conn);
1431
1432 if (avail <= 1) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001433 /* No more streams available, remove it from the list */
1434 LIST_DEL(&srv_conn->list);
1435 LIST_INIT(&srv_conn->list);
1436 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001437
1438 if (avail >= 1) {
1439 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001440 if (srv_cs) {
1441 alloced_cs = 1;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001442 si_attach_cs(&s->si[1], srv_cs);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001443 } else
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001444 srv_conn = NULL;
1445 }
Olivier Houchard134a2042018-12-28 14:45:47 +01001446 else
1447 srv_conn = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001448 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001449 /* otherwise srv_conn is left intact */
1450 }
1451 else
1452 srv_conn = NULL;
1453
1454 /* no reuse or failed to reuse the connection above, pick a new one */
1455 if (!srv_conn) {
1456 srv_conn = conn_new();
Willy Tarreau1da41ec2019-02-01 16:38:48 +01001457 if (srv_conn)
1458 srv_conn->target = s->target;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001459 srv_cs = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001460 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001461
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001462 if (srv_conn && old_conn != srv_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001463 if (srv_conn->owner)
1464 session_unown_conn(srv_conn->owner, srv_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001465 srv_conn->owner = s->sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001466 if (!session_add_conn(s->sess, srv_conn, srv_conn->target)) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001467 /* If we failed to attach the connection, detach the
1468 * conn_stream, possibly destroying the connection */
Olivier Houchard4dc85532019-01-29 15:50:38 +01001469 if (alloced_cs)
1470 si_release_endpoint(&s->si[1]);
Olivier Houchard351411f2018-12-27 17:20:54 +01001471 srv_conn->owner = NULL;
Olivier Houchard26da3232019-01-29 16:05:02 +01001472 if (srv_conn->mux && !srv_add_to_idle_list(objt_server(srv_conn->target), srv_conn))
Olivier Houchard351411f2018-12-27 17:20:54 +01001473 /* The server doesn't want it, let's kill the connection right away */
Christopher Faulet73c12072019-04-08 11:23:22 +02001474 srv_conn->mux->destroy(srv_conn->ctx);
Olivier Houchard351411f2018-12-27 17:20:54 +01001475 srv_conn = NULL;
1476
1477 }
Willy Tarreau323a2d92015-08-04 19:00:17 +02001478 }
Willy Tarreauc12b5e62015-08-04 19:45:36 +02001479
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001480 if (!srv_conn) {
1481 if (srv_conn)
1482 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001483 return SF_ERR_RESOURCE;
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001484 }
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001485
Willy Tarreaue7dff022015-04-03 01:14:29 +02001486 if (!(s->flags & SF_ADDR_SET)) {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001487 err = assign_server_address(s, srv_conn);
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001488 if (err != SRV_STATUS_OK) {
1489 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001490 return SF_ERR_INTERNAL;
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001491 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001492 }
1493
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001494 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreauff605db2013-12-20 11:09:51 +01001495 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001496 if (srv)
Willy Tarreau7b004922015-08-04 19:34:21 +02001497 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001498 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1499 /* proxies exclusively run on raw_sock right now */
Willy Tarreaua261e9b2016-12-22 20:44:00 +01001500 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), xprt_get(XPRT_RAW));
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001501 if (!(srv_conn->ctrl)) {
1502 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001503 return SF_ERR_INTERNAL;
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001504 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001505 }
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001506 else {
1507 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001508 return SF_ERR_INTERNAL; /* how did we get there ? */
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001509 }
Willy Tarreaud02394b2012-05-11 18:32:18 +02001510
Lukas Tribusda95fd92018-11-25 13:21:27 +01001511#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001512 if (!srv ||
1513 ((!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
Olivier Houchardb4a8b2c2019-06-15 00:13:15 +02001514 srv->mux_proto || s->be->mode != PR_MODE_HTTP))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001515#endif
1516 {
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001517 srv_cs = objt_cs(s->si[1].end);
1518 if (!srv_cs || srv_cs->conn != srv_conn)
1519 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001520 if (!srv_cs) {
1521 conn_free(srv_conn);
1522 return SF_ERR_RESOURCE;
1523 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001524 init_mux = 1;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001525 }
Lukas Tribusda95fd92018-11-25 13:21:27 +01001526#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001527 else {
Willy Tarreau94031d32018-12-19 14:36:29 +01001528 srv_conn->ctx = &s->si[1].end;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001529 /* Store the connection into the stream interface,
1530 * while we still don't have a mux, so that if the
1531 * stream is destroyed before the connection is
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001532 * established, we have a chance to destroy it even
1533 * if it is no longer referenced in the session.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001534 */
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001535 s->si[1].end = &srv_conn->obj_type;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001536 conn_set_xprt_done_cb(srv_conn, conn_complete_server);
1537 }
1538
1539#endif
1540
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001541
Willy Tarreauff605db2013-12-20 11:09:51 +01001542 /* process the case where the server requires the PROXY protocol to be sent */
1543 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001544 cli_conn = objt_conn(strm_orig(s));
1545
Willy Tarreau7b004922015-08-04 19:34:21 +02001546 if (srv && srv->pp_opts) {
Willy Tarreau387ebf82015-08-04 19:24:13 +02001547 srv_conn->flags |= CO_FL_PRIVATE;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001548 srv_conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreauff605db2013-12-20 11:09:51 +01001549 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001550 if (cli_conn)
1551 conn_get_to_addr(cli_conn);
1552 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001553
Willy Tarreauff605db2013-12-20 11:09:51 +01001554 assign_tproxy_address(s);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001555
1556 if (srv && (srv->flags & SRV_F_SOCKS4_PROXY)) {
1557 srv_conn->send_proxy_ofs = 1;
1558 srv_conn->flags |= CO_FL_SOCKS4;
1559 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001560 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001561 else if (!conn_xprt_ready(srv_conn)) {
1562 if (srv_conn->mux->reset)
1563 srv_conn->mux->reset(srv_conn);
1564 }
Olivier Houchard36deb212019-10-25 17:00:54 +02001565 else {
1566 /* Only consider we're doing reuse if the connection was
1567 * ready.
1568 */
1569 if (srv_conn->mux->ctl(srv_conn, MUX_STATUS, NULL) & MUX_STATUS_READY)
1570 s->flags |= SF_SRV_REUSED;
1571 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001572
William Lallemandb7ff6a32012-03-02 14:35:21 +01001573 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001574 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001575 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001576
Willy Tarreau14f8e862012-08-30 22:23:13 +02001577 /* disable lingering */
1578 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001579 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001580
Willy Tarreauf1573842018-12-14 11:35:36 +01001581 if (s->flags & SF_SRV_REUSED) {
Olivier Houchard237f7812019-03-08 18:49:07 +01001582 _HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001583 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001584 _HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001585 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +01001586 _HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001587 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001588 _HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001589 }
1590
Olivier Houchard201b9f42018-11-21 00:16:29 +01001591 err = si_connect(&s->si[1], srv_conn);
Willy Tarreaud9b35d92019-07-18 16:18:20 +02001592 if (err != SF_ERR_NONE)
1593 return err;
1594
Olivier Houchard5cd62172019-01-04 15:52:26 +01001595 /* We have to defer the mux initialization until after si_connect()
1596 * has been called, as we need the xprt to have been properly
1597 * initialized, or any attempt to recv during the mux init may
1598 * fail, and flag the connection as CO_FL_ERROR.
1599 */
1600 if (init_mux) {
Olivier Houchard74931142019-01-29 19:11:16 +01001601 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0) {
1602 conn_full_close(srv_conn);
Olivier Houchard5cd62172019-01-04 15:52:26 +01001603 return SF_ERR_INTERNAL;
Olivier Houchard74931142019-01-29 19:11:16 +01001604 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001605 /* If we're doing http-reuse always, and the connection
1606 * is an http2 connection, add it to the available list,
1607 * so that others can use it right away.
1608 */
1609 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1610 srv_conn->mux->avail_streams(srv_conn) > 0)
1611 LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
1612 }
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001613 /* The CO_FL_SEND_PROXY flag may have been set by the connect method,
1614 * if so, add our handshake pseudo-XPRT now.
1615 */
Olivier Houchardfc4c35a2019-06-24 18:19:40 +02001616 if ((srv_conn->flags & CO_FL_HANDSHAKE_NOSSL)) {
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001617 if (xprt_add_hs(srv_conn) < 0) {
1618 conn_full_close(srv_conn);
1619 return SF_ERR_INTERNAL;
1620 }
1621 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001622
Willy Tarreaubaaee002006-06-26 02:48:02 +02001623
Willy Tarreau5db847a2019-05-09 14:13:35 +02001624#if USE_OPENSSL && (defined(OPENSSL_IS_BORINGSSL) || (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L))
Olivier Houchard4cd2af42019-05-06 15:18:27 +02001625
Olivier Houchard8694e5b2019-06-15 00:14:05 +02001626 if (!reuse && cli_conn && srv && srv_conn->mux &&
Olivier Houchard522eea72017-11-03 16:27:47 +01001627 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001628 /* Only attempt to use early data if either the client sent
1629 * early data, so that we know it can handle a 425, or if
1630 * we are allwoed to retry requests on early data failure, and
1631 * it's our first try
1632 */
1633 ((cli_conn->flags & CO_FL_EARLY_DATA) ||
1634 ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
1635 s->si[1].conn_retries == s->be->conn_retries)) &&
1636 !channel_is_empty(si_oc(&s->si[1])) &&
1637 srv_conn->flags & CO_FL_SSL_WAIT_HS)
Olivier Houchard522eea72017-11-03 16:27:47 +01001638 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001639#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001640
Willy Tarreau14f8e862012-08-30 22:23:13 +02001641 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001642 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001643
Willy Tarreau827aee92011-03-10 16:55:02 +01001644 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001645 int count;
1646
Willy Tarreaue7dff022015-04-03 01:14:29 +02001647 s->flags |= SF_CURR_SESS;
Olivier Houchard237f7812019-03-08 18:49:07 +01001648 count = _HA_ATOMIC_ADD(&srv->cur_sess, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +02001649 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001650 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001651 s->be->lbprm.server_take_conn(srv);
Willy Tarreau732eac42015-07-09 11:40:25 +02001652
1653#ifdef USE_OPENSSL
1654 if (srv->ssl_ctx.sni) {
1655 struct sample *smp;
1656 int rewind;
1657
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001658 if (!IS_HTX_STRM(s)) {
1659 /* Tricky case : we have already scheduled the pending
1660 * HTTP request or TCP data for leaving. So in HTTP we
1661 * rewind exactly the headers, otherwise we rewind the
1662 * output data.
1663 */
1664 rewind = s->txn ? http_hdr_rewind(&s->txn->req) : co_data(&s->req);
1665 c_rew(&s->req, rewind);
1666
1667 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1668 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau732eac42015-07-09 11:40:25 +02001669
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001670 /* restore the pointers */
1671 c_adv(&s->req, rewind);
1672 }
1673 else {
1674 /* rewind the output data. */
1675 rewind = co_data(&s->req);
1676 c_rew(&s->req, rewind);
1677
1678 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1679 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau732eac42015-07-09 11:40:25 +02001680
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001681 /* restore the pointers */
1682 c_adv(&s->req, rewind);
1683 }
Willy Tarreau732eac42015-07-09 11:40:25 +02001684
Willy Tarreau2e0565c2016-08-09 11:55:21 +02001685 if (smp_make_safe(smp)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001686 ssl_sock_set_servername(srv_conn,
1687 smp->data.u.str.area);
Willy Tarreau387ebf82015-08-04 19:24:13 +02001688 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreau732eac42015-07-09 11:40:25 +02001689 }
1690 }
1691#endif /* USE_OPENSSL */
1692
Willy Tarreaubaaee002006-06-26 02:48:02 +02001693 }
1694
Willy Tarreaue7dff022015-04-03 01:14:29 +02001695 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001696}
1697
1698
Willy Tarreaubaaee002006-06-26 02:48:02 +02001699/* This function performs the "redispatch" part of a connection attempt. It
1700 * will assign a server if required, queue the connection if required, and
1701 * handle errors that might arise at this level. It can change the server
1702 * state. It will return 1 if it encounters an error, switches the server
1703 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1704 * that the connection is ready to use.
1705 */
1706
Willy Tarreau87b09662015-04-03 00:22:06 +02001707int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001708{
Willy Tarreau827aee92011-03-10 16:55:02 +01001709 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001710 int conn_err;
1711
1712 /* We know that we don't have any connection pending, so we will
1713 * try to get a new one, and wait in this state if it's queued
1714 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001715 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001716 conn_err = assign_server_and_queue(s);
1717 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001718
Willy Tarreaubaaee002006-06-26 02:48:02 +02001719 switch (conn_err) {
1720 case SRV_STATUS_OK:
1721 break;
1722
Willy Tarreau7c669d72008-06-20 15:04:11 +02001723 case SRV_STATUS_FULL:
1724 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1725 * and we can redispatch to another server, or it is not and we return
1726 * 503. This only makes sense in DIRECT mode however, because normal LB
1727 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001728 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001729 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001730 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001731 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001732 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001733 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001734 goto redispatch;
1735 }
1736
Willy Tarreau350f4872014-11-28 14:42:25 +01001737 if (!s->si[1].err_type) {
1738 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001739 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001740
Olivier Houchard237f7812019-03-08 18:49:07 +01001741 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1742 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001743 return 1;
1744
Willy Tarreaubaaee002006-06-26 02:48:02 +02001745 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001746 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001747 if (!s->si[1].err_type) {
1748 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001749 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001750
Olivier Houchard237f7812019-03-08 18:49:07 +01001751 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001752 return 1;
1753
1754 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001755 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1756 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001757 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001758 return 1;
1759
Willy Tarreaubaaee002006-06-26 02:48:02 +02001760 case SRV_STATUS_INTERNAL:
1761 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001762 if (!s->si[1].err_type) {
1763 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001764 }
1765
Willy Tarreau827aee92011-03-10 16:55:02 +01001766 if (srv)
1767 srv_inc_sess_ctr(srv);
1768 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001769 srv_set_sess_last(srv);
1770 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001771 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1772 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001773
Willy Tarreau87b09662015-04-03 00:22:06 +02001774 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001775 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001776 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001777 return 1;
1778 }
1779 /* if we get here, it's because we got SRV_STATUS_OK, which also
1780 * means that the connection has not been queued.
1781 */
1782 return 0;
1783}
1784
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001785/* sends a log message when a backend goes down, and also sets last
1786 * change date.
1787 */
1788void set_backend_down(struct proxy *be)
1789{
1790 be->last_change = now.tv_sec;
Olivier Houchard237f7812019-03-08 18:49:07 +01001791 _HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001792
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001793 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001794 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001795 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
1796 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001797}
1798
Willy Tarreau87b09662015-04-03 00:22:06 +02001799/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001800 * tries to extract an RDP cookie from the request buffer, and look for the
1801 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02001802 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001803 * list. Nothing is performed if a server was already assigned.
1804 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001805int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001806{
1807 struct proxy *px = s->be;
1808 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02001809 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001810 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01001811 uint16_t port;
1812 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001813 char *p;
1814
Christopher Faulet45073512018-07-20 10:16:29 +02001815 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 +02001816 now_ms, __FUNCTION__,
1817 s,
1818 req,
1819 req->rex, req->wex,
1820 req->flags,
Christopher Faulet45073512018-07-20 10:16:29 +02001821 ci_data(req),
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001822 req->analysers);
1823
Willy Tarreaue7dff022015-04-03 01:14:29 +02001824 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001825 goto no_cookie;
1826
Willy Tarreau37406352012-04-23 16:16:37 +02001827 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001828
Willy Tarreaucadd8c92013-07-22 18:09:52 +02001829 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001830 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001831 goto no_cookie;
1832
Willy Tarreau04276f32017-01-06 17:41:29 +01001833 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
1834 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
1835 * server's IP address in network order, and "port" is the integer corresponding to the
1836 * server's port in network order. Comments please Emeric.
1837 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001838 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001839 if (*p != '.')
1840 goto no_cookie;
1841 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01001842
1843 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001844 if (*p != '.')
1845 goto no_cookie;
1846
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001847 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001848 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02001849 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01001850 port == srv->svc_port &&
1851 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001852 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001853 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001854 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001855 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001856 break;
1857 }
1858 }
1859 srv = srv->next;
1860 }
1861
1862no_cookie:
1863 req->analysers &= ~an_bit;
1864 req->analyse_exp = TICK_ETERNITY;
1865 return 1;
1866}
1867
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001868int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01001869 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001870 return px->down_time;
1871
1872 return now.tv_sec - px->last_change + px->down_time;
1873}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001874
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001875/*
1876 * This function returns a string containing the balancing
1877 * mode of the proxy in a format suitable for stats.
1878 */
1879
1880const char *backend_lb_algo_str(int algo) {
1881
1882 if (algo == BE_LB_ALGO_RR)
1883 return "roundrobin";
1884 else if (algo == BE_LB_ALGO_SRR)
1885 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01001886 else if (algo == BE_LB_ALGO_FAS)
1887 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001888 else if (algo == BE_LB_ALGO_LC)
1889 return "leastconn";
1890 else if (algo == BE_LB_ALGO_SH)
1891 return "source";
1892 else if (algo == BE_LB_ALGO_UH)
1893 return "uri";
1894 else if (algo == BE_LB_ALGO_PH)
1895 return "url_param";
1896 else if (algo == BE_LB_ALGO_HH)
1897 return "hdr";
1898 else if (algo == BE_LB_ALGO_RCH)
1899 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001900 else if (algo == BE_LB_ALGO_NONE)
1901 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001902 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001903 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001904}
1905
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001906/* This function parses a "balance" statement in a backend section describing
1907 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001908 * returns -1, it will write an error message into the <err> buffer which will
1909 * automatically be allocated and must be passed as NULL. The trailing '\n'
1910 * will not be written. The function must be called with <args> pointing to the
1911 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001912 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001913int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001914{
1915 if (!*(args[0])) {
1916 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01001917 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1918 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001919 return 0;
1920 }
1921
1922 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001923 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1924 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001925 }
Willy Tarreau9757a382009-10-03 12:56:50 +02001926 else if (!strcmp(args[0], "static-rr")) {
1927 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1928 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
1929 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01001930 else if (!strcmp(args[0], "first")) {
1931 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1932 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
1933 }
Willy Tarreau51406232008-03-10 22:04:20 +01001934 else if (!strcmp(args[0], "leastconn")) {
1935 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1936 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
1937 }
Willy Tarreau21c741a2019-01-14 18:14:27 +01001938 else if (!strncmp(args[0], "random", 6)) {
Willy Tarreau760e81d2018-05-03 07:20:40 +02001939 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1940 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
Willy Tarreau21c741a2019-01-14 18:14:27 +01001941 curproxy->lbprm.arg_opt1 = 2;
1942
1943 if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */
1944 const char *beg;
1945 char *end;
1946
1947 beg = args[0] + 7;
1948 curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0);
1949
1950 if (*end != ')') {
1951 if (!*end)
1952 memprintf(err, "random : missing closing parenthesis.");
1953 else
1954 memprintf(err, "random : unexpected character '%c' after argument.", *end);
1955 return -1;
1956 }
1957
1958 if (curproxy->lbprm.arg_opt1 < 1) {
1959 memprintf(err, "random : number of draws must be at least 1.");
1960 return -1;
1961 }
1962 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02001963 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001964 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001965 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1966 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001967 }
1968 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001969 int arg = 1;
1970
Willy Tarreau31682232007-11-29 15:38:04 +01001971 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1972 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Willy Tarreaua9a72492019-01-14 16:14:15 +01001973 curproxy->lbprm.arg_opt1 = 0; // "whole"
1974 curproxy->lbprm.arg_opt2 = 0; // "len"
1975 curproxy->lbprm.arg_opt3 = 0; // "depth"
Oskar Stolc8dc41842012-05-19 10:19:54 +01001976
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001977 while (*args[arg]) {
1978 if (!strcmp(args[arg], "len")) {
1979 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001980 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001981 return -1;
1982 }
Willy Tarreaua9a72492019-01-14 16:14:15 +01001983 curproxy->lbprm.arg_opt2 = atoi(args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001984 arg += 2;
1985 }
1986 else if (!strcmp(args[arg], "depth")) {
1987 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001988 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001989 return -1;
1990 }
1991 /* hint: we store the position of the ending '/' (depth+1) so
1992 * that we avoid a comparison while computing the hash.
1993 */
Willy Tarreaua9a72492019-01-14 16:14:15 +01001994 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001995 arg += 2;
1996 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01001997 else if (!strcmp(args[arg], "whole")) {
Willy Tarreaua9a72492019-01-14 16:14:15 +01001998 curproxy->lbprm.arg_opt1 = 1;
Oskar Stolc8dc41842012-05-19 10:19:54 +01001999 arg += 1;
2000 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002001 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01002002 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002003 return -1;
2004 }
2005 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002006 }
Willy Tarreau01732802007-11-01 22:48:15 +01002007 else if (!strcmp(args[0], "url_param")) {
2008 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002009 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01002010 return -1;
2011 }
Willy Tarreau31682232007-11-29 15:38:04 +01002012 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2013 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02002014
Willy Tarreau4c03d1c2019-01-14 15:23:54 +01002015 free(curproxy->lbprm.arg_str);
2016 curproxy->lbprm.arg_str = strdup(args[1]);
2017 curproxy->lbprm.arg_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002018 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002019 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002020 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002021 return -1;
2022 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002023 }
Benoitaffb4812009-03-25 13:02:10 +01002024 }
2025 else if (!strncmp(args[0], "hdr(", 4)) {
2026 const char *beg, *end;
2027
2028 beg = args[0] + 4;
2029 end = strchr(beg, ')');
2030
2031 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002032 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01002033 return -1;
2034 }
2035
2036 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2037 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
2038
Willy Tarreau484ff072019-01-14 15:28:53 +01002039 free(curproxy->lbprm.arg_str);
2040 curproxy->lbprm.arg_len = end - beg;
2041 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
Willy Tarreau9fed8582019-01-14 16:04:54 +01002042 curproxy->lbprm.arg_opt1 = 0;
Benoitaffb4812009-03-25 13:02:10 +01002043
2044 if (*args[1]) {
2045 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002046 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01002047 return -1;
2048 }
Willy Tarreau9fed8582019-01-14 16:04:54 +01002049 curproxy->lbprm.arg_opt1 = 1;
Benoitaffb4812009-03-25 13:02:10 +01002050 }
Emeric Brun736aa232009-06-30 17:56:00 +02002051 }
2052 else if (!strncmp(args[0], "rdp-cookie", 10)) {
2053 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2054 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
2055
2056 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
2057 const char *beg, *end;
2058
2059 beg = args[0] + 11;
2060 end = strchr(beg, ')');
2061
2062 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002063 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002064 return -1;
2065 }
2066
Willy Tarreau484ff072019-01-14 15:28:53 +01002067 free(curproxy->lbprm.arg_str);
2068 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
2069 curproxy->lbprm.arg_len = end - beg;
Emeric Brun736aa232009-06-30 17:56:00 +02002070 }
2071 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
Willy Tarreau484ff072019-01-14 15:28:53 +01002072 free(curproxy->lbprm.arg_str);
2073 curproxy->lbprm.arg_str = strdup("mstshash");
2074 curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str);
Emeric Brun736aa232009-06-30 17:56:00 +02002075 }
2076 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002077 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002078 return -1;
2079 }
Willy Tarreau01732802007-11-01 22:48:15 +01002080 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002081 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002082 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 +01002083 return -1;
2084 }
2085 return 0;
2086}
2087
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002088
2089/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002090/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002091/************************************************************************/
2092
Willy Tarreau34db1082012-04-19 17:16:54 +02002093/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002094 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002095 * undefined behaviour.
2096 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002097static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002098smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002099{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002100 struct proxy *px;
2101
Willy Tarreau37406352012-04-23 16:16:37 +02002102 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002103 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002104 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002105
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002106 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002107
2108 return 1;
2109}
2110
Willy Tarreau37406352012-04-23 16:16:37 +02002111/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002112 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02002113 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2114 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002115 */
2116static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002117smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002118{
Willy Tarreau24e32d82012-04-23 23:55:44 +02002119 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002120
Willy Tarreau37406352012-04-23 16:16:37 +02002121 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002122 smp->data.type = SMP_T_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02002123 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
2124 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002125 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002126 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002127 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002128 return 1;
2129}
2130
Willy Tarreau34db1082012-04-19 17:16:54 +02002131/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002132 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002133 * undefined behaviour.
2134 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002135static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002136smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002137{
2138 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02002139
Willy Tarreau37406352012-04-23 16:16:37 +02002140 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002141 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002142 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002143
Willy Tarreau24e32d82012-04-23 23:55:44 +02002144 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02002145 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002146 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002147
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002148 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01002149 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002150 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002151 return 1;
2152 }
2153
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002154 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02002155 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002156 }
2157
2158 return 1;
2159}
2160
Willy Tarreaua5e37562011-12-16 17:06:15 +01002161/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002162static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002163smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002164{
Willy Tarreaube508f12016-03-10 11:47:01 +01002165 if (!smp->strm)
2166 return 0;
2167
Willy Tarreauf853c462012-04-23 18:53:56 +02002168 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002169 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002170 smp->data.u.sint = smp->strm->be->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002171 return 1;
2172}
2173
Marcin Deranekd2471c22016-12-12 14:08:05 +01002174/* set string to the name of the backend */
2175static int
2176smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2177{
2178 if (!smp->strm)
2179 return 0;
2180
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002181 smp->data.u.str.area = (char *)smp->strm->be->id;
2182 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002183 return 0;
2184
2185 smp->data.type = SMP_T_STR;
2186 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002187 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01002188
2189 return 1;
2190}
2191
Willy Tarreaua5e37562011-12-16 17:06:15 +01002192/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002193static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002194smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002195{
Willy Tarreaube508f12016-03-10 11:47:01 +01002196 if (!smp->strm)
2197 return 0;
2198
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002199 if (!objt_server(smp->strm->target))
Willy Tarreau17af4192011-02-23 14:27:06 +01002200 return 0;
2201
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002202 smp->data.type = SMP_T_SINT;
Willy Tarreau1e582e52018-09-20 11:29:28 +02002203 smp->data.u.sint = __objt_server(smp->strm->target)->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002204
2205 return 1;
2206}
2207
Willy Tarreau34db1082012-04-19 17:16:54 +02002208/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002209 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002210 * undefined behaviour.
2211 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002212static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002213smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002214{
Willy Tarreau37406352012-04-23 16:16:37 +02002215 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002216 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002217 smp->data.u.sint = read_freq_ctr(&args->data.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002218 return 1;
2219}
2220
Willy Tarreau34db1082012-04-19 17:16:54 +02002221/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002222 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002223 * undefined behaviour.
2224 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002225static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002226smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002227{
Willy Tarreau37406352012-04-23 16:16:37 +02002228 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002229 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002230 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02002231 return 1;
2232}
2233
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002234/* set temp integer to the number of available connections across available
2235 * servers on the backend.
2236 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
2237 * undefined behaviour.
2238 */
2239static int
2240smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2241{
2242 struct server *iterator;
2243 struct proxy *px;
2244 unsigned int maxconn;
2245
2246 smp->flags = SMP_F_VOL_TEST;
2247 smp->data.type = SMP_T_SINT;
2248 smp->data.u.sint = 0;
2249
2250 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
2251 if (iterator->cur_state == SRV_ST_STOPPED)
2252 continue;
2253
2254 px = iterator->proxy;
2255 if (!srv_currently_usable(iterator) ||
2256 ((iterator->flags & SRV_F_BACKUP) &&
2257 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
2258 continue;
2259
2260 if (iterator->maxconn == 0) {
2261 /* one active server is unlimited, return -1 */
2262 smp->data.u.sint = -1;
2263 return 1;
2264 }
2265
2266 maxconn = srv_dynamic_maxconn(iterator);
2267 if (maxconn > iterator->cur_sess)
2268 smp->data.u.sint += maxconn - iterator->cur_sess;
2269 }
2270
2271 return 1;
2272}
2273
Willy Tarreau34db1082012-04-19 17:16:54 +02002274/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002275 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002276 * undefined behaviour.
2277 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002278static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002279smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002280{
Willy Tarreau37406352012-04-23 16:16:37 +02002281 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002282 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002283 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002284 return 1;
2285}
2286
Willy Tarreaua5e37562011-12-16 17:06:15 +01002287/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002288 * by the number of running servers and rounded up. If there is no running
2289 * server, we return twice the total, just as if we had half a running server.
2290 * This is more or less correct anyway, since we expect the last server to come
2291 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002292 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002293 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002294 */
2295static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002296smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002297{
2298 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002299 struct proxy *px;
Willy Tarreaua36af912009-10-10 12:02:45 +02002300
Willy Tarreau37406352012-04-23 16:16:37 +02002301 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002302 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002303 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002304
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002305 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002306
2307 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002308 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002309 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002310 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002311
2312 return 1;
2313}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002314
Willy Tarreau34db1082012-04-19 17:16:54 +02002315/* set temp integer to the number of concurrent connections on the server in the backend.
2316 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2317 * undefined behaviour.
2318 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002319static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002320smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002321{
Willy Tarreauf853c462012-04-23 18:53:56 +02002322 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002323 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002324 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002325 return 1;
2326}
2327
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002328/* set temp integer to the number of available connections on the server in the backend.
2329 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2330 * undefined behaviour.
2331 */
2332static int
2333smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2334{
2335 unsigned int maxconn;
2336
2337 smp->flags = SMP_F_VOL_TEST;
2338 smp->data.type = SMP_T_SINT;
2339
2340 if (args->data.srv->maxconn == 0) {
2341 /* one active server is unlimited, return -1 */
2342 smp->data.u.sint = -1;
2343 return 1;
2344 }
2345
2346 maxconn = srv_dynamic_maxconn(args->data.srv);
2347 if (maxconn > args->data.srv->cur_sess)
2348 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2349 else
2350 smp->data.u.sint = 0;
2351
2352 return 1;
2353}
2354
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002355/* set temp integer to the number of connections pending in the server's queue.
2356 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2357 * undefined behaviour.
2358 */
2359static int
2360smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2361{
2362 smp->flags = SMP_F_VOL_TEST;
2363 smp->data.type = SMP_T_SINT;
2364 smp->data.u.sint = args->data.srv->nbpend;
2365 return 1;
2366}
2367
Tait Clarridge7896d522012-12-05 21:39:31 -05002368/* set temp integer to the number of enabled servers on the proxy.
2369 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2370 * undefined behaviour.
2371 */
2372static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002373smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002374{
2375 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002376 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002377 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002378 return 1;
2379}
2380
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002381static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2382{
2383
2384 struct proxy *px;
2385
2386 if (!smp_make_safe(smp))
2387 return 0;
2388
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002389 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002390 if (!px)
2391 return 0;
2392
2393 smp->data.type = SMP_T_SINT;
2394 smp->data.u.sint = be_usable_srv(px);
2395
2396 return 1;
2397}
2398
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002399
2400/* Note: must not be declared <const> as its list will be overwritten.
2401 * Please take care of keeping this list alphabetically sorted.
2402 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002403static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002404 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2405 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002406 { "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 +02002407 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002408 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002409 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2410 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2411 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2412 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2413 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002414 { "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 +02002415 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002416 { "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 +02002417 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002418 { "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 +01002419 { /* END */ },
2420}};
2421
Willy Tarreau0108d902018-11-25 19:14:37 +01002422INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2423
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002424/* Note: must not be declared <const> as its list will be overwritten */
2425static struct sample_conv_kw_list sample_conv_kws = {ILH, {
2426 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2427 { /* END */ },
2428}};
2429
Willy Tarreau0108d902018-11-25 19:14:37 +01002430INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002431
Willy Tarreau61612d42012-04-19 18:42:05 +02002432/* Note: must not be declared <const> as its list will be overwritten.
2433 * Please take care of keeping this list alphabetically sorted.
2434 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002435static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002436 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002437}};
2438
Willy Tarreau0108d902018-11-25 19:14:37 +01002439INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002440
Willy Tarreaubaaee002006-06-26 02:48:02 +02002441/*
2442 * Local variables:
2443 * c-indent-level: 8
2444 * c-basic-offset: 8
2445 * End:
2446 */