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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;
577 /* ensure all 32 bits are covered as long as RAND_MAX >= 65535 */
578 hash = ((uint64_t)random() * ((uint64_t)RAND_MAX + 1)) ^ random();
579 curr = chash_get_server_hash(px, hash, avoid);
580 if (!curr)
581 break;
582
583 /* compare the new server to the previous best choice and pick
584 * the one with the least currently served requests.
585 */
586 if (prev && prev != curr &&
587 curr->served * prev->cur_eweight > prev->served * curr->cur_eweight)
588 curr = prev;
589 } while (--draws > 0);
590
591 return curr;
Willy Tarreau760e81d2018-05-03 07:20:40 +0200592}
593
Benoitaffb4812009-03-25 13:02:10 +0100594/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200595 * This function applies the load-balancing algorithm to the stream, as
596 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200597 * 'assigned'.
598 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200599 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200600 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100601 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200602 * The function tries to keep the original connection slot if it reconnects to
603 * the same server, otherwise it releases it and tries to offer it.
604 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200605 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200606 *
607 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100608 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200609 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
610 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200611 * SRV_STATUS_INTERNAL for other unrecoverable errors.
612 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200613 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100614 * it does not need to be called anymore. This means that target_srv(&s->target)
615 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200616 *
617 */
618
Willy Tarreau87b09662015-04-03 00:22:06 +0200619int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200620{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100621 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200622 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100623 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200624 int err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100625
Simon Horman8effd3d2011-08-13 08:03:52 +0900626 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200627
Willy Tarreau7c669d72008-06-20 15:04:11 +0200628 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200629 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200630 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100631
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100632 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200633 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200634
Willy Tarreau7c669d72008-06-20 15:04:11 +0200635 /* We have to release any connection slot before applying any LB algo,
636 * otherwise we may erroneously end up with no available slot.
637 */
638 if (conn_slot)
639 sess_change_server(s, NULL);
640
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100641 /* We will now try to find the good server and store it into <objt_server(s->target)>.
642 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200643 * as well as if no server is available (check error code).
644 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100645
Willy Tarreau827aee92011-03-10 16:55:02 +0100646 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100647 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100648
Olivier Houchardba4fff52018-12-01 14:40:40 +0100649 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200650 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100651 (s->be->options & PR_O_PREF_LAST))) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100652 struct sess_srv_list *srv_list;
653 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
654 struct server *tmpsrv = objt_server(srv_list->target);
Olivier Houchardba4fff52018-12-01 14:40:40 +0100655
656 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200657 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100658 (!s->be->max_ka_queue ||
659 server_has_room(tmpsrv) || (
660 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
661 srv_currently_usable(tmpsrv)) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100662 list_for_each_entry(conn, &srv_list->conn_list, session_list) {
Olivier Houchardba4fff52018-12-01 14:40:40 +0100663 if (conn->flags & CO_FL_CONNECTED) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100664
Olivier Houchardba4fff52018-12-01 14:40:40 +0100665 srv = tmpsrv;
666 s->target = &srv->obj_type;
667 goto out_ok;
668 }
669 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100670 }
671 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100672 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100673 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200674
Willy Tarreau7c669d72008-06-20 15:04:11 +0200675 /* we must check if we have at least one server available */
676 if (!s->be->lbprm.tot_weight) {
677 err = SRV_STATUS_NOSRV;
678 goto out;
679 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200680
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200681 /* First check whether we need to fetch some data or simply call
682 * the LB lookup function. Only the hashing functions will need
683 * some input data in fact, and will support multiple algorithms.
684 */
685 switch (s->be->lbprm.algo & BE_LB_LKUP) {
686 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100687 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200688 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200689
Willy Tarreauf09c6602012-02-13 17:12:08 +0100690 case BE_LB_LKUP_FSTREE:
691 srv = fas_get_next_server(s->be, prev_srv);
692 break;
693
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200694 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100695 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200696 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200697
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200698 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200699 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200700 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200701 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
Willy Tarreau59884a62019-01-02 14:48:31 +0100702 srv = get_server_rnd(s, prev_srv);
Willy Tarreau6c30be52019-01-14 17:07:39 +0100703 else if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100704 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200705 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100706 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200707 break;
708 }
709 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200710 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200711 err = SRV_STATUS_INTERNAL;
712 goto out;
713 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200714
715 switch (s->be->lbprm.algo & BE_LB_PARM) {
716 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200717 conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200718 if (conn && conn->addr.from.ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200719 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200720 (void *)&((struct sockaddr_in *)&conn->addr.from)->sin_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100721 4, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200722 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200723 else if (conn && conn->addr.from.ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200724 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200725 (void *)&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100726 16, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200727 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200728 else {
729 /* unknown IP family */
730 err = SRV_STATUS_INTERNAL;
731 goto out;
732 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200733 break;
734
735 case BE_LB_HASH_URI:
736 /* URI hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200737 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100738 break;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100739 if (!IS_HTX_STRM(s))
740 srv = get_server_uh(s->be,
741 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
742 s->txn->req.sl.rq.u_l, prev_srv);
743 else {
744 struct ist uri;
745
Christopher Faulet297fbb42019-05-13 14:41:27 +0200746 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100747 srv = get_server_uh(s->be, uri.ptr, uri.len, prev_srv);
748 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200749 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200750
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200751 case BE_LB_HASH_PRM:
752 /* URL Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200753 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100754 break;
Willy Tarreau61a21a32011-03-01 20:35:49 +0100755
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100756 if (!IS_HTX_STRM(s))
757 srv = get_server_ph(s->be,
758 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
759 s->txn->req.sl.rq.u_l, prev_srv);
760 else {
761 struct ist uri;
762
Christopher Faulet297fbb42019-05-13 14:41:27 +0200763 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100764 srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv);
765 }
Willy Tarreau61a21a32011-03-01 20:35:49 +0100766
Willy Tarreaueee5b512015-04-03 23:46:31 +0200767 if (!srv && s->txn->meth == HTTP_METH_POST)
Willy Tarreau59884a62019-01-02 14:48:31 +0100768 srv = get_server_ph_post(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200769 break;
Benoitaffb4812009-03-25 13:02:10 +0100770
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200771 case BE_LB_HASH_HDR:
772 /* Header Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200773 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100774 break;
Willy Tarreau59884a62019-01-02 14:48:31 +0100775 srv = get_server_hh(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200776 break;
777
778 case BE_LB_HASH_RDP:
779 /* RDP Cookie hashing */
Willy Tarreau59884a62019-01-02 14:48:31 +0100780 srv = get_server_rch(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200781 break;
782
783 default:
784 /* unknown balancing algorithm */
785 err = SRV_STATUS_INTERNAL;
786 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100787 }
Emeric Brun736aa232009-06-30 17:56:00 +0200788
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200789 /* If the hashing parameter was not found, let's fall
790 * back to round robin on the map.
791 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100792 if (!srv) {
Willy Tarreau6c30be52019-01-14 17:07:39 +0100793 if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100794 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200795 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100796 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200797 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200798
799 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200800 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200801
Willy Tarreau7c669d72008-06-20 15:04:11 +0200802 default:
803 /* unknown balancing algorithm */
804 err = SRV_STATUS_INTERNAL;
805 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200806 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200807
Willy Tarreau827aee92011-03-10 16:55:02 +0100808 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200809 err = SRV_STATUS_FULL;
810 goto out;
811 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100812 else if (srv != prev_srv) {
Olivier Houchard237f7812019-03-08 18:49:07 +0100813 _HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
814 _HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100815 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100816 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200817 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200818 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100819 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200820 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100821 else if ((s->be->options & PR_O_HTTP_PROXY)) {
822 conn = cs_conn(objt_cs(s->si[1].end));
823
824 if (conn && is_addr(&conn->addr.to)) {
825 /* in proxy mode, we need a valid destination address */
826 s->target = &s->be->obj_type;
827 } else {
828 err = SRV_STATUS_NOSRV;
829 goto out;
830 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100831 }
832 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200833 err = SRV_STATUS_NOSRV;
834 goto out;
835 }
836
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100837out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200838 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200839 err = SRV_STATUS_OK;
840 out:
841
842 /* Either we take back our connection slot, or we offer it to someone
843 * else if we don't need it anymore.
844 */
845 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100846 if (conn_slot == srv) {
847 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200848 } else {
849 if (may_dequeue_tasks(conn_slot, s->be))
850 process_srv_queue(conn_slot);
851 }
852 }
853
854 out_err:
855 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200856}
857
Willy Tarreaubaaee002006-06-26 02:48:02 +0200858/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200859 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200860 * The address is taken from the currently assigned server, or from the
861 * dispatch or transparent address.
862 *
863 * It may return :
864 * SRV_STATUS_OK if everything is OK.
865 * SRV_STATUS_INTERNAL for other unrecoverable errors.
866 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200867 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200868 * not cleared, so it's to the caller to clear it if required.
869 *
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200870 * The caller is responsible for having already assigned a connection
871 * to si->end.
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200872 *
Willy Tarreaubaaee002006-06-26 02:48:02 +0200873 */
Olivier Houchard201b9f42018-11-21 00:16:29 +0100874int assign_server_address(struct stream *s, struct connection *srv_conn)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200875{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200876 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200877
Christopher Faulet56803b12017-11-24 16:06:18 +0100878 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200879
Willy Tarreaue7dff022015-04-03 01:14:29 +0200880 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200881 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200882 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200883 return SRV_STATUS_INTERNAL;
884
Willy Tarreau1e582e52018-09-20 11:29:28 +0200885 srv_conn->addr.to = __objt_server(s->target)->addr;
886 set_host_port(&srv_conn->addr.to, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200887
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200888 if (!is_addr(&srv_conn->addr.to) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200889 /* if the server has no address, we use the same address
890 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200891 * locally on multiple addresses at once. Nothing is done
892 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200893 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200894 conn_get_to_addr(cli_conn);
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200895
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200896 if (cli_conn->addr.to.ss_family == AF_INET) {
897 ((struct sockaddr_in *)&srv_conn->addr.to)->sin_addr = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
898 } else if (cli_conn->addr.to.ss_family == AF_INET6) {
899 ((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 +0200900 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200901 }
902
Willy Tarreaubaaee002006-06-26 02:48:02 +0200903 /* if this server remaps proxied ports, we'll use
904 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +0200905 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +0100906 int base_port;
907
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200908 conn_get_to_addr(cli_conn);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100909
910 /* First, retrieve the port from the incoming connection */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200911 base_port = get_host_port(&cli_conn->addr.to);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100912
913 /* Second, assign the outgoing connection's port */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200914 base_port += get_host_port(&srv_conn->addr.to);
915 set_host_port(&srv_conn->addr.to, base_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200916 }
917 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200918 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200919 /* connect to the defined dispatch addr */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200920 srv_conn->addr.to = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200921 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200922 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200923 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200924 conn_get_to_addr(cli_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200925
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200926 if (cli_conn->addr.to.ss_family == AF_INET || cli_conn->addr.to.ss_family == AF_INET6)
927 srv_conn->addr.to = cli_conn->addr.to;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200928 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100929 else if (s->be->options & PR_O_HTTP_PROXY) {
930 /* If HTTP PROXY option is set, then server is already assigned
931 * during incoming client request parsing. */
932 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +0100933 else {
934 /* no server and no LB algorithm ! */
935 return SRV_STATUS_INTERNAL;
936 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200937
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100938 /* Copy network namespace from client connection */
Thierry FOURNIERfe1ebcd2014-12-19 13:37:11 +0100939 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100940
Willy Tarreaue7dff022015-04-03 01:14:29 +0200941 s->flags |= SF_ADDR_SET;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200942 return SRV_STATUS_OK;
943}
944
Willy Tarreau87b09662015-04-03 00:22:06 +0200945/* This function assigns a server to stream <s> if required, and can add the
Willy Tarreaubaaee002006-06-26 02:48:02 +0200946 * connection to either the assigned server's queue or to the proxy's queue.
Willy Tarreau87b09662015-04-03 00:22:06 +0200947 * If ->srv_conn is set, the stream is first released from the server.
Willy Tarreaue7dff022015-04-03 01:14:29 +0200948 * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will
Willy Tarreau7c669d72008-06-20 15:04:11 +0200949 * be called before any connection and after any retry or redispatch occurs.
950 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200951 * It is not allowed to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200952 *
953 * Returns :
954 *
955 * SRV_STATUS_OK if everything is OK.
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100956 * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200957 * SRV_STATUS_QUEUED if the connection has been queued.
958 * SRV_STATUS_FULL if the server(s) is/are saturated and the
Willy Tarreau827aee92011-03-10 16:55:02 +0100959 * connection could not be queued at the server's,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200960 * which may be NULL if we queue on the backend.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200961 * SRV_STATUS_INTERNAL for other unrecoverable errors.
962 *
963 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200964int assign_server_and_queue(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200965{
966 struct pendconn *p;
Willy Tarreau827aee92011-03-10 16:55:02 +0100967 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200968 int err;
969
970 if (s->pend_pos)
971 return SRV_STATUS_INTERNAL;
972
Willy Tarreau7c669d72008-06-20 15:04:11 +0200973 err = SRV_STATUS_OK;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200974 if (!(s->flags & SF_ASSIGNED)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100975 struct server *prev_srv = objt_server(s->target);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100976
Willy Tarreau7c669d72008-06-20 15:04:11 +0200977 err = assign_server(s);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100978 if (prev_srv) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200979 /* This stream was previously assigned to a server. We have to
980 * update the stream's and the server's stats :
Willy Tarreau7c669d72008-06-20 15:04:11 +0200981 * - if the server changed :
982 * - set TX_CK_DOWN if txn.flags was TX_CK_VALID
Willy Tarreaue7dff022015-04-03 01:14:29 +0200983 * - set SF_REDISP if it was successfully redispatched
Willy Tarreau7c669d72008-06-20 15:04:11 +0200984 * - increment srv->redispatches and be->redispatches
985 * - if the server remained the same : update retries.
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100986 */
987
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100988 if (prev_srv != objt_server(s->target)) {
Willy Tarreaueee5b512015-04-03 23:46:31 +0200989 if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) {
990 s->txn->flags &= ~TX_CK_MASK;
991 s->txn->flags |= TX_CK_DOWN;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200992 }
Willy Tarreaue7dff022015-04-03 01:14:29 +0200993 s->flags |= SF_REDISP;
Olivier Houchard237f7812019-03-08 18:49:07 +0100994 _HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
995 _HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200996 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +0100997 _HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
998 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100999 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001000 }
1001 }
1002
Willy Tarreaubaaee002006-06-26 02:48:02 +02001003 switch (err) {
1004 case SRV_STATUS_OK:
Willy Tarreaue7dff022015-04-03 01:14:29 +02001005 /* we have SF_ASSIGNED set */
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001006 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001007 if (!srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001008 return SRV_STATUS_OK; /* dispatch or proxy mode */
1009
1010 /* If we already have a connection slot, no need to check any queue */
Willy Tarreau827aee92011-03-10 16:55:02 +01001011 if (s->srv_conn == srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001012 return SRV_STATUS_OK;
1013
Willy Tarreau87b09662015-04-03 00:22:06 +02001014 /* OK, this stream already has an assigned server, but no
Willy Tarreau7c669d72008-06-20 15:04:11 +02001015 * connection slot yet. Either it is a redispatch, or it was
1016 * assigned from persistence information (direct mode).
1017 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001018 if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) {
Willy Tarreau7c669d72008-06-20 15:04:11 +02001019 /* server scheduled for redirection, and already assigned. We
1020 * don't want to go further nor check the queue.
Willy Tarreau21d2af32008-02-14 20:25:24 +01001021 */
Willy Tarreau827aee92011-03-10 16:55:02 +01001022 sess_change_server(s, srv); /* not really needed in fact */
Willy Tarreau21d2af32008-02-14 20:25:24 +01001023 return SRV_STATUS_OK;
1024 }
1025
Willy Tarreau87b09662015-04-03 00:22:06 +02001026 /* We might have to queue this stream if the assigned server is full.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001027 * We know we have to queue it into the server's queue, so if a maxqueue
1028 * is set on the server, we must also check that the server's queue is
1029 * not full, in which case we have to return FULL.
1030 */
Willy Tarreau827aee92011-03-10 16:55:02 +01001031 if (srv->maxconn &&
1032 (srv->nbpend || srv->served >= srv_dynamic_maxconn(srv))) {
Willy Tarreau7c669d72008-06-20 15:04:11 +02001033
Willy Tarreau827aee92011-03-10 16:55:02 +01001034 if (srv->maxqueue > 0 && srv->nbpend >= srv->maxqueue)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001035 return SRV_STATUS_FULL;
1036
Willy Tarreaubaaee002006-06-26 02:48:02 +02001037 p = pendconn_add(s);
1038 if (p)
1039 return SRV_STATUS_QUEUED;
1040 else
Willy Tarreau7c669d72008-06-20 15:04:11 +02001041 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001042 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001043
1044 /* OK, we can use this server. Let's reserve our place */
Willy Tarreau827aee92011-03-10 16:55:02 +01001045 sess_change_server(s, srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001046 return SRV_STATUS_OK;
1047
1048 case SRV_STATUS_FULL:
Willy Tarreau87b09662015-04-03 00:22:06 +02001049 /* queue this stream into the proxy's queue */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001050 p = pendconn_add(s);
1051 if (p)
1052 return SRV_STATUS_QUEUED;
1053 else
Willy Tarreau7c669d72008-06-20 15:04:11 +02001054 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001055
1056 case SRV_STATUS_NOSRV:
Willy Tarreau7c669d72008-06-20 15:04:11 +02001057 return err;
1058
Willy Tarreaubaaee002006-06-26 02:48:02 +02001059 case SRV_STATUS_INTERNAL:
1060 return err;
Willy Tarreau7c669d72008-06-20 15:04:11 +02001061
Willy Tarreaubaaee002006-06-26 02:48:02 +02001062 default:
1063 return SRV_STATUS_INTERNAL;
1064 }
Willy Tarreau5b6995c2008-01-13 16:31:17 +01001065}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001066
Willy Tarreaub1d67742010-03-29 19:36:59 +02001067/* If an explicit source binding is specified on the server and/or backend, and
1068 * this source makes use of the transparent proxy, then it is extracted now and
Willy Tarreau87b09662015-04-03 00:22:06 +02001069 * assigned to the stream's pending connection. This function assumes that an
Willy Tarreau350f4872014-11-28 14:42:25 +01001070 * outgoing connection has already been assigned to s->si[1].end.
Willy Tarreaub1d67742010-03-29 19:36:59 +02001071 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001072static void assign_tproxy_address(struct stream *s)
Willy Tarreaub1d67742010-03-29 19:36:59 +02001073{
Willy Tarreau29fbe512015-08-20 19:35:14 +02001074#if defined(CONFIG_HAP_TRANSPARENT)
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001075 struct server *srv = objt_server(s->target);
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001076 struct conn_src *src;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001077 struct connection *cli_conn;
Olivier Houchard09a0f032019-01-17 15:59:13 +01001078 struct connection *srv_conn;
1079
1080 if (objt_cs(s->si[1].end))
1081 srv_conn = cs_conn(__objt_cs(s->si[1].end));
1082 else
1083 srv_conn = objt_conn(s->si[1].end);
Willy Tarreau827aee92011-03-10 16:55:02 +01001084
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001085 if (srv && srv->conn_src.opts & CO_SRC_BIND)
1086 src = &srv->conn_src;
1087 else if (s->be->conn_src.opts & CO_SRC_BIND)
1088 src = &s->be->conn_src;
1089 else
1090 return;
Willy Tarreau294c4732011-12-16 21:35:50 +01001091
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001092 switch (src->opts & CO_SRC_TPROXY_MASK) {
1093 case CO_SRC_TPROXY_ADDR:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001094 srv_conn->addr.from = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001095 break;
1096 case CO_SRC_TPROXY_CLI:
1097 case CO_SRC_TPROXY_CIP:
1098 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001099 cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001100 if (cli_conn)
1101 srv_conn->addr.from = cli_conn->addr.from;
1102 else
1103 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001104 break;
1105 case CO_SRC_TPROXY_DYN:
Willy Tarreaueee5b512015-04-03 23:46:31 +02001106 if (src->bind_hdr_occ && s->txn) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001107 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001108 size_t vlen;
Willy Tarreau294c4732011-12-16 21:35:50 +01001109
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001110 /* bind to the IP in a header */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001111 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_family = AF_INET;
1112 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_port = 0;
1113 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr = 0;
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001114 if (!IS_HTX_STRM(s)) {
1115 int rewind;
Willy Tarreau294c4732011-12-16 21:35:50 +01001116
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001117 c_rew(&s->req, rewind = http_hdr_rewind(&s->txn->req));
1118 if (http_get_hdr(&s->txn->req, src->bind_hdr_name, src->bind_hdr_len,
1119 &s->txn->hdr_idx, src->bind_hdr_occ, NULL, &vptr, &vlen)) {
1120 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
1121 htonl(inetaddr_host_lim(vptr, vptr + vlen));
1122 }
1123 c_adv(&s->req, rewind);
1124 }
1125 else {
1126 if (http_get_htx_hdr(htxbuf(&s->req.buf),
1127 ist2(src->bind_hdr_name, src->bind_hdr_len),
1128 src->bind_hdr_occ, NULL, &vptr, &vlen)) {
1129 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
1130 htonl(inetaddr_host_lim(vptr, vptr + vlen));
1131 }
Willy Tarreaubce70882009-09-07 11:51:47 +02001132 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001133 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001134 break;
1135 default:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001136 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreaub1d67742010-03-29 19:36:59 +02001137 }
1138#endif
1139}
1140
Lukas Tribusda95fd92018-11-25 13:21:27 +01001141#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001142/*
1143 * Pick the right mux once the connection is established, we should now have
Willy Tarreau94031d32018-12-19 14:36:29 +01001144 * an alpn if available, so we are now able to choose. In this specific case
1145 * the connection's context is &si[i].end.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001146 */
1147static int conn_complete_server(struct connection *conn)
1148{
1149 struct conn_stream *cs = NULL;
Willy Tarreau94031d32018-12-19 14:36:29 +01001150 struct stream *s = container_of(conn->ctx, struct stream, si[1].end);
Olivier Houchardbf024f02018-11-29 17:08:53 +01001151 struct server *srv;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001152
Olivier Houchard70d9b2f2018-11-29 16:57:32 +01001153 task_wakeup(s->task, TASK_WOKEN_IO);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001154 conn_clear_xprt_done_cb(conn);
1155 /* Verify if the connection just established. */
1156 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED))))
1157 conn->flags |= CO_FL_CONNECTED;
1158
Olivier Houchard201b9f42018-11-21 00:16:29 +01001159 if (conn->flags & CO_FL_ERROR)
1160 goto fail;
Olivier Houchardd76bd2d2018-11-29 16:58:49 +01001161 si_detach_endpoint(&s->si[1]);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001162 cs = si_alloc_cs(&s->si[1], conn);
1163 if (!cs)
1164 goto fail;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001165 if (conn_install_mux_be(conn, cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001166 goto fail;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001167 srv = objt_server(s->target);
Olivier Houchard7aec9ed2018-12-14 19:31:51 +01001168 if (srv && ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
Olivier Houchardbf024f02018-11-29 17:08:53 +01001169 conn->mux->avail_streams(conn) > 0)
1170 LIST_ADD(&srv->idle_conns[tid], &conn->list);
1171
Olivier Houchard201b9f42018-11-21 00:16:29 +01001172 return 0;
1173
1174fail:
Willy Tarreaud8220132019-01-28 16:33:35 +01001175 si_detach_endpoint(&s->si[1]);
1176
Olivier Houchard201b9f42018-11-21 00:16:29 +01001177 if (cs)
1178 cs_free(cs);
1179 /* kill the connection now */
1180 conn_stop_tracking(conn);
1181 conn_full_close(conn);
1182 conn_free(conn);
Olivier Houchard4f417512018-12-27 18:59:46 +01001183 /* Let process_stream know it went wrong */
1184 s->si[1].flags |= SI_FL_ERR;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001185 return -1;
1186}
Olivier Houchardc6e0bb42018-11-23 14:24:10 +01001187#endif
Olivier Houchard201b9f42018-11-21 00:16:29 +01001188
Willy Tarreaub1d67742010-03-29 19:36:59 +02001189
Willy Tarreaubaaee002006-06-26 02:48:02 +02001190/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001191 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001192 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001193 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001194 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001195 * - SF_ERR_NONE if everything's OK
1196 * - SF_ERR_SRVTO if there are no more servers
1197 * - SF_ERR_SRVCL if the connection was refused by the server
1198 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1199 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1200 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001201 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001202 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001203 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001204 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001205int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001206{
Olivier Houchard522eea72017-11-03 16:27:47 +01001207 struct connection *cli_conn = NULL;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001208 struct connection *srv_conn = NULL;
1209 struct connection *old_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001210 struct conn_stream *srv_cs = NULL;
Willy Tarreau827aee92011-03-10 16:55:02 +01001211 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001212 int reuse = 0;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001213 int reuse_orphan = 0;
Olivier Houchard5cd62172019-01-04 15:52:26 +01001214 int init_mux = 0;
Olivier Houchard4dc85532019-01-29 15:50:38 +01001215 int alloced_cs = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001216 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001217
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001218
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001219 /* Some, such as http_proxy and the LUA, create their connection and
1220 * conn_stream manually, so if we already have a conn_stream, try
1221 * to use it.
1222 */
1223 srv_cs = objt_cs(s->si[1].end);
Olivier Houchard9ef51552019-01-28 15:33:15 +01001224 if (!srv_cs)
1225 srv_conn = objt_conn(s->si[1].end);
1226 else
1227 srv_conn = cs_conn(srv_cs);
1228
1229 if (srv_conn) {
1230 if (!srv_conn->target || srv_conn->target == s->target) {
1231 srv_conn->flags &= ~(CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH);
1232 if (srv_cs)
Willy Tarreau7bb39d72019-06-03 14:23:33 +02001233 srv_cs->flags &= ~(CS_FL_ERROR | CS_FL_EOS);
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001234 reuse = 1;
Olivier Houchard9ef51552019-01-28 15:33:15 +01001235 old_conn = srv_conn;
1236 } else {
1237 srv_conn = NULL;
Olivier Houcharda9da4672019-07-08 16:30:32 +02001238 srv_cs = NULL;
Olivier Houchard9ef51552019-01-28 15:33:15 +01001239 si_release_endpoint(&s->si[1]);
Olivier Houchardac1ce6f2018-12-08 19:08:48 +01001240 }
Olivier Houchard9ef51552019-01-28 15:33:15 +01001241 }
1242
1243 if (!old_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001244 struct sess_srv_list *srv_list;
1245 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
1246 if (srv_list->target == s->target) {
1247 list_for_each_entry(srv_conn, &srv_list->conn_list,
Olivier Houchard2442f682018-12-01 17:03:38 +01001248 session_list) {
1249 if (conn_xprt_ready(srv_conn) &&
1250 srv_conn->mux && (srv_conn->mux->avail_streams(srv_conn) > 0)) {
1251 reuse = 1;
1252 break;
1253 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001254 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001255 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001256 }
1257 }
Olivier Houchardc3fa6382018-12-27 15:29:53 +01001258 if (reuse == 0) {
1259 srv_conn = NULL;
Olivier Houchard351411f2018-12-27 17:20:54 +01001260 if (!LIST_ISEMPTY(&s->sess->srv_list)) {
1261 srv_list = LIST_ELEM(s->sess->srv_list.n,
1262 struct sess_srv_list *, srv_list);
1263 if (!LIST_ISEMPTY(&srv_list->conn_list))
1264 srv_conn = LIST_ELEM(srv_list->conn_list.n,
1265 struct connection *, session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001266 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001267
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001268 }
1269 }
1270 old_conn = srv_conn;
1271
Willy Tarreau7b004922015-08-04 19:34:21 +02001272 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001273
Willy Tarreau8dff9982015-08-04 20:45:52 +02001274 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001275 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001276
Willy Tarreau449d74a2015-08-05 17:16:33 +02001277 /* Below we pick connections from the safe or idle lists based
1278 * on the strategy, the fact that this is a first or second
1279 * (retryable) request, with the indicated priority (1 or 2) :
1280 *
1281 * SAFE AGGR ALWS
1282 *
1283 * +-----+-----+ +-----+-----+ +-----+-----+
1284 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1285 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1286 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1287 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1288 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1289 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1290 */
Christopher Faulet40a007c2017-07-03 15:41:01 +02001291 if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001292 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1293 s->txn && (s->txn->flags & TX_NOT_FIRST))) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001294 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001295 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001296 else if (srv->safe_conns && !LIST_ISEMPTY(&srv->safe_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001297 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1298 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR)) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001299 srv_conn = LIST_ELEM(srv->safe_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001300 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001301 else if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001302 (s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001303 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001304 } else if (srv->idle_orphan_conns && !LIST_ISEMPTY(&srv->idle_orphan_conns[tid]) &&
1305 (((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) ||
1306 (((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
1307 s->txn && (s->txn->flags & TX_NOT_FIRST)))) {
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001308 srv_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
Willy Tarreauc912f942019-02-28 16:06:56 +01001309 struct connection *, list);
1310 if (srv_conn)
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001311 reuse_orphan = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001312 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001313
Willy Tarreau449d74a2015-08-05 17:16:33 +02001314 /* If we've picked a connection from the pool, we now have to
1315 * detach it. We may have to get rid of the previous idle
1316 * connection we had, so for this we try to swap it with the
1317 * other owner's. That way it may remain alive for others to
1318 * pick.
1319 */
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001320 if (srv_conn)
Willy Tarreau8dff9982015-08-04 20:45:52 +02001321 reuse = 1;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001322 }
1323
Willy Tarreau34601a82013-12-15 16:33:46 +01001324 if (reuse) {
1325 /* Disable connection reuse if a dynamic source is used.
1326 * As long as we don't share connections between servers,
1327 * we don't need to disable connection reuse on no-idempotent
1328 * requests nor when PROXY protocol is used.
1329 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001330 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1331 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1332 reuse = 0;
1333 }
1334 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1335 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1336 reuse = 0;
1337 }
1338 }
Olivier Houchard14fcc2e2019-06-05 13:55:01 +02001339 if (((!reuse || (srv_conn && !(srv_conn->flags & CO_FL_CONNECTED)))
1340 && ha_used_fds > global.tune.pool_high_count) && srv->idle_orphan_conns) {
Olivier Houchard88698d92019-04-16 19:07:22 +02001341 struct connection *tokill_conn;
1342
1343 /* We can't reuse a connection, and e have more FDs than deemd
1344 * acceptable, attempt to kill an idling connection
1345 */
1346 /* First, try from our own idle list */
1347 tokill_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
1348 struct connection *, list);
1349 if (tokill_conn)
1350 tokill_conn->mux->destroy(tokill_conn->ctx);
1351 /* If not, iterate over other thread's idling pool, and try to grab one */
1352 else {
1353 int i;
1354
1355 for (i = 0; i < global.nbthread; i++) {
1356 if (i == tid)
1357 continue;
Willy Tarreau08e2b412019-05-26 11:50:08 +02001358
1359 // just silence stupid gcc which reports an absurd
1360 // out-of-bounds warning for <i> which is always
1361 // exactly zero without threads, but it seems to
1362 // see it possibly larger.
1363 ALREADY_CHECKED(i);
1364
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);
1373 break;
1374 }
1375 }
1376 }
1377
1378 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001379 /* If we're really reusing the connection, remove it from the orphan
1380 * list and add it back to the idle list.
1381 */
Christopher Faulet46451d62019-04-19 15:39:22 +02001382 if (reuse) {
1383 if (reuse_orphan) {
1384 srv_conn->idle_time = 0;
1385 _HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
1386 __ha_barrier_atomic_store();
1387 srv->curr_idle_thr[tid]--;
1388 LIST_ADDQ(&srv->idle_conns[tid], &srv_conn->list);
1389 }
1390 else {
1391 if (srv_conn->flags & CO_FL_SESS_IDLE) {
1392 struct session *sess = srv_conn->owner;
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001393
Christopher Faulet46451d62019-04-19 15:39:22 +02001394 srv_conn->flags &= ~CO_FL_SESS_IDLE;
1395 sess->idle_conns--;
1396 }
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001397 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001398 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001399
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001400 /* We're about to use another connection, let the mux know we're
1401 * done with this one
1402 */
Olivier Houchardc685d702018-12-28 16:20:25 +01001403 if (old_conn != srv_conn && old_conn && reuse && !reuse_orphan) {
1404 struct session *sess = srv_conn->owner;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001405
Olivier Houchardc685d702018-12-28 16:20:25 +01001406 if (sess) {
1407 if (old_conn && !(old_conn->flags & CO_FL_PRIVATE) &&
1408 old_conn->mux != NULL) {
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001409 if (old_conn->flags & CO_FL_SESS_IDLE)
1410 s->sess->idle_conns--;
Olivier Houchardc685d702018-12-28 16:20:25 +01001411 session_unown_conn(s->sess, old_conn);
1412 old_conn->owner = sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001413 if (!session_add_conn(sess, old_conn, old_conn->target)) {
Olivier Houcharda48237f2019-05-02 12:04:15 +02001414 old_conn->flags &= ~CO_FL_SESS_IDLE;
Olivier Houchardc685d702018-12-28 16:20:25 +01001415 old_conn->owner = NULL;
Christopher Faulet73c12072019-04-08 11:23:22 +02001416 old_conn->mux->destroy(old_conn->ctx);
Olivier Houchardc685d702018-12-28 16:20:25 +01001417 } else
1418 session_check_idle_conn(sess, old_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001419 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001420 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001421 }
1422
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001423 if (reuse) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001424 /* We already created a cs earlier when using http_proxy, so
1425 * only create a new one if we don't have one already.
1426 */
Olivier Houchard9ef51552019-01-28 15:33:15 +01001427 if (!srv_cs && srv_conn->mux) {
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001428 int avail = srv_conn->mux->avail_streams(srv_conn);
1429
1430 if (avail <= 1) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001431 /* No more streams available, remove it from the list */
1432 LIST_DEL(&srv_conn->list);
1433 LIST_INIT(&srv_conn->list);
1434 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001435
1436 if (avail >= 1) {
1437 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001438 if (srv_cs) {
1439 alloced_cs = 1;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001440 si_attach_cs(&s->si[1], srv_cs);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001441 } else
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001442 srv_conn = NULL;
1443 }
Olivier Houchard134a2042018-12-28 14:45:47 +01001444 else
1445 srv_conn = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001446 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001447 /* otherwise srv_conn is left intact */
1448 }
1449 else
1450 srv_conn = NULL;
1451
1452 /* no reuse or failed to reuse the connection above, pick a new one */
1453 if (!srv_conn) {
1454 srv_conn = conn_new();
Willy Tarreau1da41ec2019-02-01 16:38:48 +01001455 if (srv_conn)
1456 srv_conn->target = s->target;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001457 srv_cs = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001458 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001459
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001460 if (srv_conn && old_conn != srv_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001461 if (srv_conn->owner)
1462 session_unown_conn(srv_conn->owner, srv_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001463 srv_conn->owner = s->sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001464 if (!session_add_conn(s->sess, srv_conn, srv_conn->target)) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001465 /* If we failed to attach the connection, detach the
1466 * conn_stream, possibly destroying the connection */
Olivier Houchard4dc85532019-01-29 15:50:38 +01001467 if (alloced_cs)
1468 si_release_endpoint(&s->si[1]);
Olivier Houchard351411f2018-12-27 17:20:54 +01001469 srv_conn->owner = NULL;
Olivier Houchard26da3232019-01-29 16:05:02 +01001470 if (srv_conn->mux && !srv_add_to_idle_list(objt_server(srv_conn->target), srv_conn))
Olivier Houchard351411f2018-12-27 17:20:54 +01001471 /* The server doesn't want it, let's kill the connection right away */
Christopher Faulet73c12072019-04-08 11:23:22 +02001472 srv_conn->mux->destroy(srv_conn->ctx);
Olivier Houchard351411f2018-12-27 17:20:54 +01001473 srv_conn = NULL;
1474
1475 }
Willy Tarreau323a2d92015-08-04 19:00:17 +02001476 }
Willy Tarreauc12b5e62015-08-04 19:45:36 +02001477
Olivier Houchard201b9f42018-11-21 00:16:29 +01001478 if (!srv_conn)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001479 return SF_ERR_RESOURCE;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001480
Willy Tarreaue7dff022015-04-03 01:14:29 +02001481 if (!(s->flags & SF_ADDR_SET)) {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001482 err = assign_server_address(s, srv_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001483 if (err != SRV_STATUS_OK)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001484 return SF_ERR_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001485 }
1486
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001487 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreauff605db2013-12-20 11:09:51 +01001488 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001489 if (srv)
Willy Tarreau7b004922015-08-04 19:34:21 +02001490 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001491 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1492 /* proxies exclusively run on raw_sock right now */
Willy Tarreaua261e9b2016-12-22 20:44:00 +01001493 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), xprt_get(XPRT_RAW));
Olivier Houchard12950162018-11-23 14:32:08 +01001494 if (!(srv_conn->ctrl))
Willy Tarreaue7dff022015-04-03 01:14:29 +02001495 return SF_ERR_INTERNAL;
Willy Tarreauff605db2013-12-20 11:09:51 +01001496 }
1497 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001498 return SF_ERR_INTERNAL; /* how did we get there ? */
Willy Tarreaud02394b2012-05-11 18:32:18 +02001499
Lukas Tribusda95fd92018-11-25 13:21:27 +01001500#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001501 if (!srv ||
1502 ((!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
Olivier Houchardb4a8b2c2019-06-15 00:13:15 +02001503 srv->mux_proto || s->be->mode != PR_MODE_HTTP))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001504#endif
1505 {
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001506 srv_cs = objt_cs(s->si[1].end);
1507 if (!srv_cs || srv_cs->conn != srv_conn)
1508 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001509 if (!srv_cs) {
1510 conn_free(srv_conn);
1511 return SF_ERR_RESOURCE;
1512 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001513 init_mux = 1;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001514 }
Lukas Tribusda95fd92018-11-25 13:21:27 +01001515#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001516 else {
Willy Tarreau94031d32018-12-19 14:36:29 +01001517 srv_conn->ctx = &s->si[1].end;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001518 /* Store the connection into the stream interface,
1519 * while we still don't have a mux, so that if the
1520 * stream is destroyed before the connection is
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001521 * established, we have a chance to destroy it even
1522 * if it is no longer referenced in the session.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001523 */
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001524 s->si[1].end = &srv_conn->obj_type;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001525 conn_set_xprt_done_cb(srv_conn, conn_complete_server);
1526 }
1527
1528#endif
1529
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001530
Willy Tarreauff605db2013-12-20 11:09:51 +01001531 /* process the case where the server requires the PROXY protocol to be sent */
1532 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001533 cli_conn = objt_conn(strm_orig(s));
1534
Willy Tarreau7b004922015-08-04 19:34:21 +02001535 if (srv && srv->pp_opts) {
Willy Tarreau387ebf82015-08-04 19:24:13 +02001536 srv_conn->flags |= CO_FL_PRIVATE;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001537 srv_conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreauff605db2013-12-20 11:09:51 +01001538 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001539 if (cli_conn)
1540 conn_get_to_addr(cli_conn);
1541 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001542
Willy Tarreauff605db2013-12-20 11:09:51 +01001543 assign_tproxy_address(s);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001544
1545 if (srv && (srv->flags & SRV_F_SOCKS4_PROXY)) {
1546 srv_conn->send_proxy_ofs = 1;
1547 srv_conn->flags |= CO_FL_SOCKS4;
1548 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001549 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001550 else if (!conn_xprt_ready(srv_conn)) {
1551 if (srv_conn->mux->reset)
1552 srv_conn->mux->reset(srv_conn);
1553 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001554 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001555 s->flags |= SF_SRV_REUSED;
Willy Tarreaub1d67742010-03-29 19:36:59 +02001556
William Lallemandb7ff6a32012-03-02 14:35:21 +01001557 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001558 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001559 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001560
Willy Tarreau14f8e862012-08-30 22:23:13 +02001561 /* disable lingering */
1562 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001563 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001564
Willy Tarreauf1573842018-12-14 11:35:36 +01001565 if (s->flags & SF_SRV_REUSED) {
Olivier Houchard237f7812019-03-08 18:49:07 +01001566 _HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001567 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001568 _HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001569 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +01001570 _HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001571 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001572 _HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001573 }
1574
Olivier Houchard201b9f42018-11-21 00:16:29 +01001575 err = si_connect(&s->si[1], srv_conn);
Willy Tarreaud9b35d92019-07-18 16:18:20 +02001576 if (err != SF_ERR_NONE)
1577 return err;
1578
Olivier Houchard5cd62172019-01-04 15:52:26 +01001579 /* We have to defer the mux initialization until after si_connect()
1580 * has been called, as we need the xprt to have been properly
1581 * initialized, or any attempt to recv during the mux init may
1582 * fail, and flag the connection as CO_FL_ERROR.
1583 */
1584 if (init_mux) {
Olivier Houchard74931142019-01-29 19:11:16 +01001585 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0) {
1586 conn_full_close(srv_conn);
Olivier Houchard5cd62172019-01-04 15:52:26 +01001587 return SF_ERR_INTERNAL;
Olivier Houchard74931142019-01-29 19:11:16 +01001588 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001589 /* If we're doing http-reuse always, and the connection
1590 * is an http2 connection, add it to the available list,
1591 * so that others can use it right away.
1592 */
1593 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1594 srv_conn->mux->avail_streams(srv_conn) > 0)
1595 LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
1596 }
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001597 /* The CO_FL_SEND_PROXY flag may have been set by the connect method,
1598 * if so, add our handshake pseudo-XPRT now.
1599 */
Olivier Houchardfc4c35a2019-06-24 18:19:40 +02001600 if ((srv_conn->flags & CO_FL_HANDSHAKE_NOSSL)) {
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001601 if (xprt_add_hs(srv_conn) < 0) {
1602 conn_full_close(srv_conn);
1603 return SF_ERR_INTERNAL;
1604 }
1605 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001606
Willy Tarreaubaaee002006-06-26 02:48:02 +02001607
Willy Tarreau5db847a2019-05-09 14:13:35 +02001608#if USE_OPENSSL && (defined(OPENSSL_IS_BORINGSSL) || (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L))
Olivier Houchard4cd2af42019-05-06 15:18:27 +02001609
Olivier Houchard8694e5b2019-06-15 00:14:05 +02001610 if (!reuse && cli_conn && srv && srv_conn->mux &&
Olivier Houchard522eea72017-11-03 16:27:47 +01001611 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001612 /* Only attempt to use early data if either the client sent
1613 * early data, so that we know it can handle a 425, or if
1614 * we are allwoed to retry requests on early data failure, and
1615 * it's our first try
1616 */
1617 ((cli_conn->flags & CO_FL_EARLY_DATA) ||
1618 ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
1619 s->si[1].conn_retries == s->be->conn_retries)) &&
1620 !channel_is_empty(si_oc(&s->si[1])) &&
1621 srv_conn->flags & CO_FL_SSL_WAIT_HS)
Olivier Houchard522eea72017-11-03 16:27:47 +01001622 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001623#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001624
Willy Tarreau14f8e862012-08-30 22:23:13 +02001625 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001626 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001627
Willy Tarreau827aee92011-03-10 16:55:02 +01001628 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001629 int count;
1630
Willy Tarreaue7dff022015-04-03 01:14:29 +02001631 s->flags |= SF_CURR_SESS;
Olivier Houchard237f7812019-03-08 18:49:07 +01001632 count = _HA_ATOMIC_ADD(&srv->cur_sess, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +02001633 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001634 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001635 s->be->lbprm.server_take_conn(srv);
Willy Tarreau732eac42015-07-09 11:40:25 +02001636
1637#ifdef USE_OPENSSL
1638 if (srv->ssl_ctx.sni) {
1639 struct sample *smp;
1640 int rewind;
1641
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001642 if (!IS_HTX_STRM(s)) {
1643 /* Tricky case : we have already scheduled the pending
1644 * HTTP request or TCP data for leaving. So in HTTP we
1645 * rewind exactly the headers, otherwise we rewind the
1646 * output data.
1647 */
1648 rewind = s->txn ? http_hdr_rewind(&s->txn->req) : co_data(&s->req);
1649 c_rew(&s->req, rewind);
1650
1651 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1652 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau732eac42015-07-09 11:40:25 +02001653
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001654 /* restore the pointers */
1655 c_adv(&s->req, rewind);
1656 }
1657 else {
1658 /* rewind the output data. */
1659 rewind = co_data(&s->req);
1660 c_rew(&s->req, rewind);
1661
1662 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1663 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau732eac42015-07-09 11:40:25 +02001664
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001665 /* restore the pointers */
1666 c_adv(&s->req, rewind);
1667 }
Willy Tarreau732eac42015-07-09 11:40:25 +02001668
Willy Tarreau2e0565c2016-08-09 11:55:21 +02001669 if (smp_make_safe(smp)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001670 ssl_sock_set_servername(srv_conn,
1671 smp->data.u.str.area);
Willy Tarreau387ebf82015-08-04 19:24:13 +02001672 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreau732eac42015-07-09 11:40:25 +02001673 }
1674 }
1675#endif /* USE_OPENSSL */
1676
Willy Tarreaubaaee002006-06-26 02:48:02 +02001677 }
1678
Willy Tarreaue7dff022015-04-03 01:14:29 +02001679 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001680}
1681
1682
Willy Tarreaubaaee002006-06-26 02:48:02 +02001683/* This function performs the "redispatch" part of a connection attempt. It
1684 * will assign a server if required, queue the connection if required, and
1685 * handle errors that might arise at this level. It can change the server
1686 * state. It will return 1 if it encounters an error, switches the server
1687 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1688 * that the connection is ready to use.
1689 */
1690
Willy Tarreau87b09662015-04-03 00:22:06 +02001691int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001692{
Willy Tarreau827aee92011-03-10 16:55:02 +01001693 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001694 int conn_err;
1695
1696 /* We know that we don't have any connection pending, so we will
1697 * try to get a new one, and wait in this state if it's queued
1698 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001699 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001700 conn_err = assign_server_and_queue(s);
1701 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001702
Willy Tarreaubaaee002006-06-26 02:48:02 +02001703 switch (conn_err) {
1704 case SRV_STATUS_OK:
1705 break;
1706
Willy Tarreau7c669d72008-06-20 15:04:11 +02001707 case SRV_STATUS_FULL:
1708 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1709 * and we can redispatch to another server, or it is not and we return
1710 * 503. This only makes sense in DIRECT mode however, because normal LB
1711 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001712 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001713 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001714 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001715 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001716 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001717 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001718 goto redispatch;
1719 }
1720
Willy Tarreau350f4872014-11-28 14:42:25 +01001721 if (!s->si[1].err_type) {
1722 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001723 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001724
Olivier Houchard237f7812019-03-08 18:49:07 +01001725 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1726 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001727 return 1;
1728
Willy Tarreaubaaee002006-06-26 02:48:02 +02001729 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001730 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001731 if (!s->si[1].err_type) {
1732 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001733 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001734
Olivier Houchard237f7812019-03-08 18:49:07 +01001735 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001736 return 1;
1737
1738 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001739 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1740 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001741 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001742 return 1;
1743
Willy Tarreaubaaee002006-06-26 02:48:02 +02001744 case SRV_STATUS_INTERNAL:
1745 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001746 if (!s->si[1].err_type) {
1747 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001748 }
1749
Willy Tarreau827aee92011-03-10 16:55:02 +01001750 if (srv)
1751 srv_inc_sess_ctr(srv);
1752 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001753 srv_set_sess_last(srv);
1754 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001755 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1756 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001757
Willy Tarreau87b09662015-04-03 00:22:06 +02001758 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001759 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001760 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001761 return 1;
1762 }
1763 /* if we get here, it's because we got SRV_STATUS_OK, which also
1764 * means that the connection has not been queued.
1765 */
1766 return 0;
1767}
1768
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001769/* sends a log message when a backend goes down, and also sets last
1770 * change date.
1771 */
1772void set_backend_down(struct proxy *be)
1773{
1774 be->last_change = now.tv_sec;
Olivier Houchard237f7812019-03-08 18:49:07 +01001775 _HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001776
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001777 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001778 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001779 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
1780 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001781}
1782
Willy Tarreau87b09662015-04-03 00:22:06 +02001783/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001784 * tries to extract an RDP cookie from the request buffer, and look for the
1785 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02001786 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001787 * list. Nothing is performed if a server was already assigned.
1788 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001789int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001790{
1791 struct proxy *px = s->be;
1792 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02001793 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001794 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01001795 uint16_t port;
1796 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001797 char *p;
1798
Christopher Faulet45073512018-07-20 10:16:29 +02001799 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 +02001800 now_ms, __FUNCTION__,
1801 s,
1802 req,
1803 req->rex, req->wex,
1804 req->flags,
Christopher Faulet45073512018-07-20 10:16:29 +02001805 ci_data(req),
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001806 req->analysers);
1807
Willy Tarreaue7dff022015-04-03 01:14:29 +02001808 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001809 goto no_cookie;
1810
Willy Tarreau37406352012-04-23 16:16:37 +02001811 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001812
Willy Tarreaucadd8c92013-07-22 18:09:52 +02001813 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001814 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001815 goto no_cookie;
1816
Willy Tarreau04276f32017-01-06 17:41:29 +01001817 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
1818 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
1819 * server's IP address in network order, and "port" is the integer corresponding to the
1820 * server's port in network order. Comments please Emeric.
1821 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001822 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001823 if (*p != '.')
1824 goto no_cookie;
1825 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01001826
1827 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001828 if (*p != '.')
1829 goto no_cookie;
1830
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001831 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001832 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02001833 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01001834 port == srv->svc_port &&
1835 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001836 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001837 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001838 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001839 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001840 break;
1841 }
1842 }
1843 srv = srv->next;
1844 }
1845
1846no_cookie:
1847 req->analysers &= ~an_bit;
1848 req->analyse_exp = TICK_ETERNITY;
1849 return 1;
1850}
1851
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001852int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01001853 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001854 return px->down_time;
1855
1856 return now.tv_sec - px->last_change + px->down_time;
1857}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001858
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001859/*
1860 * This function returns a string containing the balancing
1861 * mode of the proxy in a format suitable for stats.
1862 */
1863
1864const char *backend_lb_algo_str(int algo) {
1865
1866 if (algo == BE_LB_ALGO_RR)
1867 return "roundrobin";
1868 else if (algo == BE_LB_ALGO_SRR)
1869 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01001870 else if (algo == BE_LB_ALGO_FAS)
1871 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001872 else if (algo == BE_LB_ALGO_LC)
1873 return "leastconn";
1874 else if (algo == BE_LB_ALGO_SH)
1875 return "source";
1876 else if (algo == BE_LB_ALGO_UH)
1877 return "uri";
1878 else if (algo == BE_LB_ALGO_PH)
1879 return "url_param";
1880 else if (algo == BE_LB_ALGO_HH)
1881 return "hdr";
1882 else if (algo == BE_LB_ALGO_RCH)
1883 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001884 else if (algo == BE_LB_ALGO_NONE)
1885 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001886 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001887 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001888}
1889
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001890/* This function parses a "balance" statement in a backend section describing
1891 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001892 * returns -1, it will write an error message into the <err> buffer which will
1893 * automatically be allocated and must be passed as NULL. The trailing '\n'
1894 * will not be written. The function must be called with <args> pointing to the
1895 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001896 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001897int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001898{
1899 if (!*(args[0])) {
1900 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01001901 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1902 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001903 return 0;
1904 }
1905
1906 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001907 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1908 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001909 }
Willy Tarreau9757a382009-10-03 12:56:50 +02001910 else if (!strcmp(args[0], "static-rr")) {
1911 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1912 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
1913 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01001914 else if (!strcmp(args[0], "first")) {
1915 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1916 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
1917 }
Willy Tarreau51406232008-03-10 22:04:20 +01001918 else if (!strcmp(args[0], "leastconn")) {
1919 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1920 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
1921 }
Willy Tarreau21c741a2019-01-14 18:14:27 +01001922 else if (!strncmp(args[0], "random", 6)) {
Willy Tarreau760e81d2018-05-03 07:20:40 +02001923 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1924 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
Willy Tarreau21c741a2019-01-14 18:14:27 +01001925 curproxy->lbprm.arg_opt1 = 2;
1926
1927 if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */
1928 const char *beg;
1929 char *end;
1930
1931 beg = args[0] + 7;
1932 curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0);
1933
1934 if (*end != ')') {
1935 if (!*end)
1936 memprintf(err, "random : missing closing parenthesis.");
1937 else
1938 memprintf(err, "random : unexpected character '%c' after argument.", *end);
1939 return -1;
1940 }
1941
1942 if (curproxy->lbprm.arg_opt1 < 1) {
1943 memprintf(err, "random : number of draws must be at least 1.");
1944 return -1;
1945 }
1946 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02001947 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001948 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001949 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1950 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001951 }
1952 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001953 int arg = 1;
1954
Willy Tarreau31682232007-11-29 15:38:04 +01001955 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1956 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Willy Tarreaua9a72492019-01-14 16:14:15 +01001957 curproxy->lbprm.arg_opt1 = 0; // "whole"
1958 curproxy->lbprm.arg_opt2 = 0; // "len"
1959 curproxy->lbprm.arg_opt3 = 0; // "depth"
Oskar Stolc8dc41842012-05-19 10:19:54 +01001960
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001961 while (*args[arg]) {
1962 if (!strcmp(args[arg], "len")) {
1963 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001964 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001965 return -1;
1966 }
Willy Tarreaua9a72492019-01-14 16:14:15 +01001967 curproxy->lbprm.arg_opt2 = atoi(args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001968 arg += 2;
1969 }
1970 else if (!strcmp(args[arg], "depth")) {
1971 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001972 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001973 return -1;
1974 }
1975 /* hint: we store the position of the ending '/' (depth+1) so
1976 * that we avoid a comparison while computing the hash.
1977 */
Willy Tarreaua9a72492019-01-14 16:14:15 +01001978 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001979 arg += 2;
1980 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01001981 else if (!strcmp(args[arg], "whole")) {
Willy Tarreaua9a72492019-01-14 16:14:15 +01001982 curproxy->lbprm.arg_opt1 = 1;
Oskar Stolc8dc41842012-05-19 10:19:54 +01001983 arg += 1;
1984 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001985 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01001986 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001987 return -1;
1988 }
1989 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001990 }
Willy Tarreau01732802007-11-01 22:48:15 +01001991 else if (!strcmp(args[0], "url_param")) {
1992 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001993 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01001994 return -1;
1995 }
Willy Tarreau31682232007-11-29 15:38:04 +01001996 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1997 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02001998
Willy Tarreau4c03d1c2019-01-14 15:23:54 +01001999 free(curproxy->lbprm.arg_str);
2000 curproxy->lbprm.arg_str = strdup(args[1]);
2001 curproxy->lbprm.arg_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002002 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002003 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002004 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002005 return -1;
2006 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002007 }
Benoitaffb4812009-03-25 13:02:10 +01002008 }
2009 else if (!strncmp(args[0], "hdr(", 4)) {
2010 const char *beg, *end;
2011
2012 beg = args[0] + 4;
2013 end = strchr(beg, ')');
2014
2015 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002016 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01002017 return -1;
2018 }
2019
2020 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2021 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
2022
Willy Tarreau484ff072019-01-14 15:28:53 +01002023 free(curproxy->lbprm.arg_str);
2024 curproxy->lbprm.arg_len = end - beg;
2025 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
Willy Tarreau9fed8582019-01-14 16:04:54 +01002026 curproxy->lbprm.arg_opt1 = 0;
Benoitaffb4812009-03-25 13:02:10 +01002027
2028 if (*args[1]) {
2029 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002030 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01002031 return -1;
2032 }
Willy Tarreau9fed8582019-01-14 16:04:54 +01002033 curproxy->lbprm.arg_opt1 = 1;
Benoitaffb4812009-03-25 13:02:10 +01002034 }
Emeric Brun736aa232009-06-30 17:56:00 +02002035 }
2036 else if (!strncmp(args[0], "rdp-cookie", 10)) {
2037 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2038 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
2039
2040 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
2041 const char *beg, *end;
2042
2043 beg = args[0] + 11;
2044 end = strchr(beg, ')');
2045
2046 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002047 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002048 return -1;
2049 }
2050
Willy Tarreau484ff072019-01-14 15:28:53 +01002051 free(curproxy->lbprm.arg_str);
2052 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
2053 curproxy->lbprm.arg_len = end - beg;
Emeric Brun736aa232009-06-30 17:56:00 +02002054 }
2055 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
Willy Tarreau484ff072019-01-14 15:28:53 +01002056 free(curproxy->lbprm.arg_str);
2057 curproxy->lbprm.arg_str = strdup("mstshash");
2058 curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str);
Emeric Brun736aa232009-06-30 17:56:00 +02002059 }
2060 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002061 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002062 return -1;
2063 }
Willy Tarreau01732802007-11-01 22:48:15 +01002064 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002065 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002066 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 +01002067 return -1;
2068 }
2069 return 0;
2070}
2071
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002072
2073/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002074/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002075/************************************************************************/
2076
Willy Tarreau34db1082012-04-19 17:16:54 +02002077/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002078 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002079 * undefined behaviour.
2080 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002081static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002082smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002083{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002084 struct proxy *px;
2085
Willy Tarreau37406352012-04-23 16:16:37 +02002086 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002087 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002088 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002089
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002090 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002091
2092 return 1;
2093}
2094
Willy Tarreau37406352012-04-23 16:16:37 +02002095/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002096 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02002097 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2098 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002099 */
2100static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002101smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002102{
Willy Tarreau24e32d82012-04-23 23:55:44 +02002103 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002104
Willy Tarreau37406352012-04-23 16:16:37 +02002105 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002106 smp->data.type = SMP_T_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02002107 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
2108 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002109 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002110 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002111 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002112 return 1;
2113}
2114
Willy Tarreau34db1082012-04-19 17:16:54 +02002115/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002116 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002117 * undefined behaviour.
2118 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002119static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002120smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002121{
2122 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02002123
Willy Tarreau37406352012-04-23 16:16:37 +02002124 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002125 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002126 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002127
Willy Tarreau24e32d82012-04-23 23:55:44 +02002128 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02002129 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002130 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002131
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002132 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01002133 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002134 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002135 return 1;
2136 }
2137
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002138 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02002139 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002140 }
2141
2142 return 1;
2143}
2144
Willy Tarreaua5e37562011-12-16 17:06:15 +01002145/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002146static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002147smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002148{
Willy Tarreaube508f12016-03-10 11:47:01 +01002149 if (!smp->strm)
2150 return 0;
2151
Willy Tarreauf853c462012-04-23 18:53:56 +02002152 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002153 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002154 smp->data.u.sint = smp->strm->be->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002155 return 1;
2156}
2157
Marcin Deranekd2471c22016-12-12 14:08:05 +01002158/* set string to the name of the backend */
2159static int
2160smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2161{
2162 if (!smp->strm)
2163 return 0;
2164
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002165 smp->data.u.str.area = (char *)smp->strm->be->id;
2166 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002167 return 0;
2168
2169 smp->data.type = SMP_T_STR;
2170 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002171 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01002172
2173 return 1;
2174}
2175
Willy Tarreaua5e37562011-12-16 17:06:15 +01002176/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002177static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002178smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002179{
Willy Tarreaube508f12016-03-10 11:47:01 +01002180 if (!smp->strm)
2181 return 0;
2182
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002183 if (!objt_server(smp->strm->target))
Willy Tarreau17af4192011-02-23 14:27:06 +01002184 return 0;
2185
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002186 smp->data.type = SMP_T_SINT;
Willy Tarreau1e582e52018-09-20 11:29:28 +02002187 smp->data.u.sint = __objt_server(smp->strm->target)->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002188
2189 return 1;
2190}
2191
Willy Tarreau34db1082012-04-19 17:16:54 +02002192/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002193 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002194 * undefined behaviour.
2195 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002196static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002197smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002198{
Willy Tarreau37406352012-04-23 16:16:37 +02002199 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002200 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002201 smp->data.u.sint = read_freq_ctr(&args->data.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002202 return 1;
2203}
2204
Willy Tarreau34db1082012-04-19 17:16:54 +02002205/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002206 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002207 * undefined behaviour.
2208 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002209static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002210smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002211{
Willy Tarreau37406352012-04-23 16:16:37 +02002212 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002213 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002214 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02002215 return 1;
2216}
2217
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002218/* set temp integer to the number of available connections across available
2219 * servers on the backend.
2220 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
2221 * undefined behaviour.
2222 */
2223static int
2224smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2225{
2226 struct server *iterator;
2227 struct proxy *px;
2228 unsigned int maxconn;
2229
2230 smp->flags = SMP_F_VOL_TEST;
2231 smp->data.type = SMP_T_SINT;
2232 smp->data.u.sint = 0;
2233
2234 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
2235 if (iterator->cur_state == SRV_ST_STOPPED)
2236 continue;
2237
2238 px = iterator->proxy;
2239 if (!srv_currently_usable(iterator) ||
2240 ((iterator->flags & SRV_F_BACKUP) &&
2241 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
2242 continue;
2243
2244 if (iterator->maxconn == 0) {
2245 /* one active server is unlimited, return -1 */
2246 smp->data.u.sint = -1;
2247 return 1;
2248 }
2249
2250 maxconn = srv_dynamic_maxconn(iterator);
2251 if (maxconn > iterator->cur_sess)
2252 smp->data.u.sint += maxconn - iterator->cur_sess;
2253 }
2254
2255 return 1;
2256}
2257
Willy Tarreau34db1082012-04-19 17:16:54 +02002258/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002259 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002260 * undefined behaviour.
2261 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002262static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002263smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002264{
Willy Tarreau37406352012-04-23 16:16:37 +02002265 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002266 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002267 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002268 return 1;
2269}
2270
Willy Tarreaua5e37562011-12-16 17:06:15 +01002271/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002272 * by the number of running servers and rounded up. If there is no running
2273 * server, we return twice the total, just as if we had half a running server.
2274 * This is more or less correct anyway, since we expect the last server to come
2275 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002276 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002277 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002278 */
2279static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002280smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002281{
2282 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002283 struct proxy *px;
Willy Tarreaua36af912009-10-10 12:02:45 +02002284
Willy Tarreau37406352012-04-23 16:16:37 +02002285 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002286 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002287 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002288
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002289 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002290
2291 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002292 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002293 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002294 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002295
2296 return 1;
2297}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002298
Willy Tarreau34db1082012-04-19 17:16:54 +02002299/* set temp integer to the number of concurrent connections on the server in the backend.
2300 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2301 * undefined behaviour.
2302 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002303static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002304smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002305{
Willy Tarreauf853c462012-04-23 18:53:56 +02002306 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002307 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002308 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002309 return 1;
2310}
2311
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002312/* set temp integer to the number of available connections on the server in the backend.
2313 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2314 * undefined behaviour.
2315 */
2316static int
2317smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2318{
2319 unsigned int maxconn;
2320
2321 smp->flags = SMP_F_VOL_TEST;
2322 smp->data.type = SMP_T_SINT;
2323
2324 if (args->data.srv->maxconn == 0) {
2325 /* one active server is unlimited, return -1 */
2326 smp->data.u.sint = -1;
2327 return 1;
2328 }
2329
2330 maxconn = srv_dynamic_maxconn(args->data.srv);
2331 if (maxconn > args->data.srv->cur_sess)
2332 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2333 else
2334 smp->data.u.sint = 0;
2335
2336 return 1;
2337}
2338
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002339/* set temp integer to the number of connections pending in the server's queue.
2340 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2341 * undefined behaviour.
2342 */
2343static int
2344smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2345{
2346 smp->flags = SMP_F_VOL_TEST;
2347 smp->data.type = SMP_T_SINT;
2348 smp->data.u.sint = args->data.srv->nbpend;
2349 return 1;
2350}
2351
Tait Clarridge7896d522012-12-05 21:39:31 -05002352/* set temp integer to the number of enabled servers on the proxy.
2353 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2354 * undefined behaviour.
2355 */
2356static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002357smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002358{
2359 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002360 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002361 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002362 return 1;
2363}
2364
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002365static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2366{
2367
2368 struct proxy *px;
2369
2370 if (!smp_make_safe(smp))
2371 return 0;
2372
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002373 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002374 if (!px)
2375 return 0;
2376
2377 smp->data.type = SMP_T_SINT;
2378 smp->data.u.sint = be_usable_srv(px);
2379
2380 return 1;
2381}
2382
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002383
2384/* Note: must not be declared <const> as its list will be overwritten.
2385 * Please take care of keeping this list alphabetically sorted.
2386 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002387static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002388 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2389 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002390 { "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 +02002391 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002392 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002393 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2394 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2395 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2396 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2397 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002398 { "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 +02002399 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002400 { "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 +02002401 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002402 { "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 +01002403 { /* END */ },
2404}};
2405
Willy Tarreau0108d902018-11-25 19:14:37 +01002406INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2407
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002408/* Note: must not be declared <const> as its list will be overwritten */
2409static struct sample_conv_kw_list sample_conv_kws = {ILH, {
2410 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2411 { /* END */ },
2412}};
2413
Willy Tarreau0108d902018-11-25 19:14:37 +01002414INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002415
Willy Tarreau61612d42012-04-19 18:42:05 +02002416/* Note: must not be declared <const> as its list will be overwritten.
2417 * Please take care of keeping this list alphabetically sorted.
2418 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002419static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002420 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002421}};
2422
Willy Tarreau0108d902018-11-25 19:14:37 +01002423INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002424
Willy Tarreaubaaee002006-06-26 02:48:02 +02002425/*
2426 * Local variables:
2427 * c-indent-level: 8
2428 * c-basic-offset: 8
2429 * End:
2430 */