blob: ebc5050cb447cc18f3d7fcb515e2ea141bb980a7 [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Backend variables and functions.
3 *
Willy Tarreau1a7eca12013-01-07 22:38:03 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +02005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <syslog.h>
Willy Tarreauf19cf372006-11-14 15:40:51 +010018#include <string.h>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +020019#include <ctype.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040020#include <sys/types.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
Willy Tarreauc7e42382012-08-24 19:22:53 +020022#include <common/buffer.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020023#include <common/compat.h>
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020024#include <common/config.h>
Willy Tarreau7c669d72008-06-20 15:04:11 +020025#include <common/debug.h>
Bhaskar98634f02013-10-29 23:30:51 -040026#include <common/hash.h>
Christopher Fauletf7679ad2019-02-04 12:02:18 +010027#include <common/htx.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010028#include <common/initcall.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +020029#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020030#include <common/time.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010031#include <common/namespace.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020032
Willy Tarreaubaaee002006-06-26 02:48:02 +020033#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020034
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +010035#include <proto/acl.h>
Willy Tarreau34db1082012-04-19 17:16:54 +020036#include <proto/arg.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020037#include <proto/backend.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020038#include <proto/channel.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +020039#include <proto/frontend.h>
Christopher Fauletf7679ad2019-02-04 12:02:18 +010040#include <proto/http_htx.h>
Willy Tarreau6b2e11b2009-10-01 07:52:15 +020041#include <proto/lb_chash.h>
Willy Tarreauf09c6602012-02-13 17:12:08 +010042#include <proto/lb_fas.h>
Willy Tarreauf89c1872009-10-01 11:19:37 +020043#include <proto/lb_fwlc.h>
44#include <proto/lb_fwrr.h>
45#include <proto/lb_map.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020046#include <proto/log.h>
Willy Tarreau53a47662017-08-28 10:53:00 +020047#include <proto/mux_pt.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010048#include <proto/obj_type.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010049#include <proto/payload.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020050#include <proto/protocol.h>
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020051#include <proto/http_ana.h>
Willy Tarreaua8f55d52010-05-31 17:44:19 +020052#include <proto/proto_tcp.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020053#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020054#include <proto/queue.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010055#include <proto/sample.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +010056#include <proto/server.h>
Olivier Houchard00cf70f2018-11-30 17:24:55 +010057#include <proto/session.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020058#include <proto/stream.h>
Willy Tarreau9e000c62011-03-10 14:03:36 +010059#include <proto/stream_interface.h>
Willy Tarreau732eac42015-07-09 11:40:25 +020060#include <proto/ssl_sock.h>
Willy Tarreauc125cef2019-05-10 09:58:43 +020061#include <proto/task.h>
Willy Tarreau732eac42015-07-09 11:40:25 +020062
Christopher Fauleteea8fc72019-11-05 16:18:10 +010063#define TRACE_SOURCE &trace_strm
64
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050065int be_lastsession(const struct proxy *be)
66{
67 if (be->be_counters.last_sess)
68 return now.tv_sec - be->be_counters.last_sess;
69
70 return -1;
71}
72
Bhaskar98634f02013-10-29 23:30:51 -040073/* helper function to invoke the correct hash method */
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070074static unsigned int gen_hash(const struct proxy* px, const char* key, unsigned long len)
Bhaskar98634f02013-10-29 23:30:51 -040075{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070076 unsigned int hash;
Bhaskar98634f02013-10-29 23:30:51 -040077
78 switch (px->lbprm.algo & BE_LB_HASH_FUNC) {
79 case BE_LB_HFCN_DJB2:
80 hash = hash_djb2(key, len);
81 break;
Willy Tarreaua0f42712013-11-14 14:30:35 +010082 case BE_LB_HFCN_WT6:
83 hash = hash_wt6(key, len);
84 break;
Willy Tarreau324f07f2015-01-20 19:44:50 +010085 case BE_LB_HFCN_CRC32:
86 hash = hash_crc32(key, len);
87 break;
Bhaskar98634f02013-10-29 23:30:51 -040088 case BE_LB_HFCN_SDBM:
89 /* this is the default hash function */
90 default:
91 hash = hash_sdbm(key, len);
92 break;
93 }
94
95 return hash;
96}
97
Willy Tarreaubaaee002006-06-26 02:48:02 +020098/*
99 * This function recounts the number of usable active and backup servers for
100 * proxy <p>. These numbers are returned into the p->srv_act and p->srv_bck.
Willy Tarreaub625a082007-11-26 01:15:43 +0100101 * This function also recomputes the total active and backup weights. However,
Willy Tarreauf4cca452008-03-08 21:42:54 +0100102 * it does not update tot_weight nor tot_used. Use update_backend_weight() for
Willy Tarreaub625a082007-11-26 01:15:43 +0100103 * this.
Emeric Brun52a91d32017-08-31 14:41:55 +0200104 * This functions is designed to be called before server's weight and state
105 * commit so it uses 'next' weight and states values.
Christopher Faulet5b517552017-06-09 14:17:53 +0200106 *
107 * threads: this is the caller responsibility to lock data. For now, this
108 * function is called from lb modules, so it should be ok. But if you need to
109 * call it from another place, be careful (and update this comment).
Willy Tarreaubaaee002006-06-26 02:48:02 +0200110 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200111void recount_servers(struct proxy *px)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200112{
113 struct server *srv;
114
Willy Tarreau20697042007-11-15 23:26:18 +0100115 px->srv_act = px->srv_bck = 0;
116 px->lbprm.tot_wact = px->lbprm.tot_wbck = 0;
Willy Tarreaub625a082007-11-26 01:15:43 +0100117 px->lbprm.fbck = NULL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200118 for (srv = px->srv; srv != NULL; srv = srv->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +0200119 if (!srv_willbe_usable(srv))
Willy Tarreaub625a082007-11-26 01:15:43 +0100120 continue;
121
Willy Tarreauc93cd162014-05-13 15:54:22 +0200122 if (srv->flags & SRV_F_BACKUP) {
Willy Tarreaub625a082007-11-26 01:15:43 +0100123 if (!px->srv_bck &&
Willy Tarreauf4cca452008-03-08 21:42:54 +0100124 !(px->options & PR_O_USE_ALL_BK))
Willy Tarreaub625a082007-11-26 01:15:43 +0100125 px->lbprm.fbck = srv;
126 px->srv_bck++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400127 srv->cumulative_weight = px->lbprm.tot_wbck;
Emeric Brun52a91d32017-08-31 14:41:55 +0200128 px->lbprm.tot_wbck += srv->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100129 } else {
130 px->srv_act++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400131 srv->cumulative_weight = px->lbprm.tot_wact;
Emeric Brun52a91d32017-08-31 14:41:55 +0200132 px->lbprm.tot_wact += srv->next_eweight;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200133 }
134 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100135}
Willy Tarreau20697042007-11-15 23:26:18 +0100136
Willy Tarreaub625a082007-11-26 01:15:43 +0100137/* This function simply updates the backend's tot_weight and tot_used values
138 * after servers weights have been updated. It is designed to be used after
139 * recount_servers() or equivalent.
Christopher Faulet5b517552017-06-09 14:17:53 +0200140 *
141 * threads: this is the caller responsibility to lock data. For now, this
142 * function is called from lb modules, so it should be ok. But if you need to
143 * call it from another place, be careful (and update this comment).
Willy Tarreaub625a082007-11-26 01:15:43 +0100144 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200145void update_backend_weight(struct proxy *px)
Willy Tarreaub625a082007-11-26 01:15:43 +0100146{
Willy Tarreau20697042007-11-15 23:26:18 +0100147 if (px->srv_act) {
148 px->lbprm.tot_weight = px->lbprm.tot_wact;
149 px->lbprm.tot_used = px->srv_act;
150 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100151 else if (px->lbprm.fbck) {
152 /* use only the first backup server */
Emeric Brun52a91d32017-08-31 14:41:55 +0200153 px->lbprm.tot_weight = px->lbprm.fbck->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100154 px->lbprm.tot_used = 1;
Willy Tarreau20697042007-11-15 23:26:18 +0100155 }
156 else {
Willy Tarreaub625a082007-11-26 01:15:43 +0100157 px->lbprm.tot_weight = px->lbprm.tot_wbck;
158 px->lbprm.tot_used = px->srv_bck;
Willy Tarreau20697042007-11-15 23:26:18 +0100159 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100160}
161
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200162/*
163 * This function tries to find a running server for the proxy <px> following
164 * the source hash method. Depending on the number of active/backup servers,
165 * it will either look for active servers, or for backup servers.
166 * If any server is found, it will be returned. If no valid server is found,
167 * NULL is returned.
168 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100169static struct server *get_server_sh(struct proxy *px, const char *addr, int len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200170{
171 unsigned int h, l;
172
173 if (px->lbprm.tot_weight == 0)
174 return NULL;
175
176 l = h = 0;
177
178 /* note: we won't hash if there's only one server left */
179 if (px->lbprm.tot_used == 1)
180 goto hash_done;
181
182 while ((l + sizeof (int)) <= len) {
183 h ^= ntohl(*(unsigned int *)(&addr[l]));
184 l += sizeof (int);
185 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500186 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100187 h = full_hash(h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200188 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100189 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100190 return chash_get_server_hash(px, h, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200191 else
192 return map_get_server_hash(px, h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200193}
194
195/*
196 * This function tries to find a running server for the proxy <px> following
197 * the URI hash method. In order to optimize cache hits, the hash computation
198 * ends at the question mark. Depending on the number of active/backup servers,
199 * it will either look for active servers, or for backup servers.
200 * If any server is found, it will be returned. If no valid server is found,
Willy Tarreaua9a72492019-01-14 16:14:15 +0100201 * NULL is returned. The lbprm.arg_opt{1,2,3} values correspond respectively to
202 * the "whole" optional argument (boolean), the "len" argument (numeric) and
203 * the "depth" argument (numeric).
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200204 *
205 * This code was contributed by Guillaume Dallaire, who also selected this hash
206 * algorithm out of a tens because it gave him the best results.
207 *
208 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100209static struct server *get_server_uh(struct proxy *px, char *uri, int uri_len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200210{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700211 unsigned int hash = 0;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200212 int c;
213 int slashes = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400214 const char *start, *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200215
216 if (px->lbprm.tot_weight == 0)
217 return NULL;
218
219 /* note: we won't hash if there's only one server left */
220 if (px->lbprm.tot_used == 1)
221 goto hash_done;
222
Willy Tarreaua9a72492019-01-14 16:14:15 +0100223 if (px->lbprm.arg_opt2) // "len"
224 uri_len = MIN(uri_len, px->lbprm.arg_opt2);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200225
Bhaskar98634f02013-10-29 23:30:51 -0400226 start = end = uri;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200227 while (uri_len--) {
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200228 c = *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200229 if (c == '/') {
230 slashes++;
Willy Tarreaua9a72492019-01-14 16:14:15 +0100231 if (slashes == px->lbprm.arg_opt3) /* depth+1 */
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200232 break;
233 }
Willy Tarreaua9a72492019-01-14 16:14:15 +0100234 else if (c == '?' && !px->lbprm.arg_opt1) // "whole"
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200235 break;
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200236 end++;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200237 }
Bhaskar98634f02013-10-29 23:30:51 -0400238
239 hash = gen_hash(px, start, (end - start));
240
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500241 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100242 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200243 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100244 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100245 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200246 else
247 return map_get_server_hash(px, hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200248}
249
Christopher Faulet5b517552017-06-09 14:17:53 +0200250/*
Willy Tarreau01732802007-11-01 22:48:15 +0100251 * This function tries to find a running server for the proxy <px> following
252 * the URL parameter hash method. It looks for a specific parameter in the
253 * URL and hashes it to compute the server ID. This is useful to optimize
254 * performance by avoiding bounces between servers in contexts where sessions
255 * are shared but cookies are not usable. If the parameter is not found, NULL
256 * is returned. If any server is found, it will be returned. If no valid server
257 * is found, NULL is returned.
Willy Tarreau01732802007-11-01 22:48:15 +0100258 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100259static 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 +0100260{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700261 unsigned int hash = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400262 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200263 const char *p;
264 const char *params;
Willy Tarreau01732802007-11-01 22:48:15 +0100265 int plen;
266
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200267 /* when tot_weight is 0 then so is srv_count */
Willy Tarreau20697042007-11-15 23:26:18 +0100268 if (px->lbprm.tot_weight == 0)
Willy Tarreau01732802007-11-01 22:48:15 +0100269 return NULL;
270
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200271 if ((p = memchr(uri, '?', uri_len)) == NULL)
272 return NULL;
273
Willy Tarreau01732802007-11-01 22:48:15 +0100274 p++;
275
276 uri_len -= (p - uri);
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100277 plen = px->lbprm.arg_len;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200278 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100279
280 while (uri_len > plen) {
281 /* Look for the parameter name followed by an equal symbol */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200282 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100283 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200284 /* OK, we have the parameter here at <params>, and
Willy Tarreau01732802007-11-01 22:48:15 +0100285 * the value after the equal sign, at <p>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200286 * skip the equal symbol
Willy Tarreau01732802007-11-01 22:48:15 +0100287 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200288 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400289 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200290 uri_len -= plen + 1;
291
Bhaskar98634f02013-10-29 23:30:51 -0400292 while (uri_len && *end != '&') {
Willy Tarreau01732802007-11-01 22:48:15 +0100293 uri_len--;
Bhaskar98634f02013-10-29 23:30:51 -0400294 end++;
Willy Tarreau01732802007-11-01 22:48:15 +0100295 }
Bhaskar98634f02013-10-29 23:30:51 -0400296 hash = gen_hash(px, start, (end - start));
297
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500298 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100299 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400300
Willy Tarreau6c30be52019-01-14 17:07:39 +0100301 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100302 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200303 else
304 return map_get_server_hash(px, hash);
Willy Tarreau01732802007-11-01 22:48:15 +0100305 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200306 }
307 /* skip to next parameter */
308 p = memchr(params, '&', uri_len);
309 if (!p)
310 return NULL;
311 p++;
312 uri_len -= (p - params);
313 params = p;
314 }
315 return NULL;
316}
317
318/*
319 * this does the same as the previous server_ph, but check the body contents
320 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100321static struct server *get_server_ph_post(struct stream *s, const struct server *avoid)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200322{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700323 unsigned int hash = 0;
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100324 struct channel *req = &s->req;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200325 struct proxy *px = s->be;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200326 struct htx *htx = htxbuf(&req->buf);
327 struct htx_blk *blk;
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100328 unsigned int plen = px->lbprm.arg_len;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100329 unsigned long len;
330 const char *params, *p, *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200331
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100332 if (px->lbprm.tot_weight == 0)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200333 return NULL;
334
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200335 p = params = NULL;
336 len = 0;
337 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
338 enum htx_blk_type type = htx_get_blk_type(blk);
339 struct ist v;
Willy Tarreauf69d4ff2015-05-02 00:05:47 +0200340
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200341 if (type != HTX_BLK_DATA)
342 continue;
343 v = htx_get_blk_value(htx, blk);
344 p = params = v.ptr;
345 len = v.len;
346 break;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100347 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200348
349 while (len > plen) {
350 /* Look for the parameter name followed by an equal symbol */
351 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100352 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200353 /* OK, we have the parameter here at <params>, and
354 * the value after the equal sign, at <p>
355 * skip the equal symbol
356 */
357 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400358 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200359 len -= plen + 1;
360
Bhaskar98634f02013-10-29 23:30:51 -0400361 while (len && *end != '&') {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200362 if (unlikely(!HTTP_IS_TOKEN(*p))) {
Willy Tarreau157dd632009-12-06 19:18:09 +0100363 /* if in a POST, body must be URI encoded or it's not a URI.
Bhaskar98634f02013-10-29 23:30:51 -0400364 * Do not interpret any possible binary data as a parameter.
Willy Tarreau157dd632009-12-06 19:18:09 +0100365 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200366 if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */
367 break;
368 return NULL; /* oh, no; this is not uri-encoded.
369 * This body does not contain parameters.
370 */
371 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200372 len--;
Bhaskar98634f02013-10-29 23:30:51 -0400373 end++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200374 /* should we break if vlen exceeds limit? */
375 }
Bhaskar98634f02013-10-29 23:30:51 -0400376 hash = gen_hash(px, start, (end - start));
377
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500378 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100379 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400380
Willy Tarreau6c30be52019-01-14 17:07:39 +0100381 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100382 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200383 else
384 return map_get_server_hash(px, hash);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200385 }
386 }
Willy Tarreau01732802007-11-01 22:48:15 +0100387 /* skip to next parameter */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200388 p = memchr(params, '&', len);
Willy Tarreau01732802007-11-01 22:48:15 +0100389 if (!p)
390 return NULL;
391 p++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200392 len -= (p - params);
393 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100394 }
395 return NULL;
396}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200397
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200398
Willy Tarreaubaaee002006-06-26 02:48:02 +0200399/*
Benoitaffb4812009-03-25 13:02:10 +0100400 * This function tries to find a running server for the proxy <px> following
401 * the Header parameter hash method. It looks for a specific parameter in the
402 * URL and hashes it to compute the server ID. This is useful to optimize
403 * performance by avoiding bounces between servers in contexts where sessions
404 * are shared but cookies are not usable. If the parameter is not found, NULL
405 * is returned. If any server is found, it will be returned. If no valid server
Willy Tarreau9fed8582019-01-14 16:04:54 +0100406 * is found, NULL is returned. When lbprm.arg_opt1 is set, the hash will only
407 * apply to the middle part of a domain name ("use_domain_only" option).
Benoitaffb4812009-03-25 13:02:10 +0100408 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100409static struct server *get_server_hh(struct stream *s, const struct server *avoid)
Benoitaffb4812009-03-25 13:02:10 +0100410{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700411 unsigned int hash = 0;
Benoitaffb4812009-03-25 13:02:10 +0100412 struct proxy *px = s->be;
Willy Tarreau484ff072019-01-14 15:28:53 +0100413 unsigned int plen = px->lbprm.arg_len;
Benoitaffb4812009-03-25 13:02:10 +0100414 unsigned long len;
Benoitaffb4812009-03-25 13:02:10 +0100415 const char *p;
Bhaskar98634f02013-10-29 23:30:51 -0400416 const char *start, *end;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200417 struct htx *htx = htxbuf(&s->req.buf);
418 struct http_hdr_ctx ctx = { .blk = NULL };
Benoitaffb4812009-03-25 13:02:10 +0100419
420 /* tot_weight appears to mean srv_count */
421 if (px->lbprm.tot_weight == 0)
422 return NULL;
423
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200424 /* note: we won't hash if there's only one server left */
425 if (px->lbprm.tot_used == 1)
426 goto hash_done;
427
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200428 http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0);
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100429
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200430 /* if the header is not found or empty, let's fallback to round robin */
431 if (!ctx.blk || !ctx.value.len)
432 return NULL;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100433
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200434 /* Found a the param_name in the headers.
435 * we will compute the hash based on this value ctx.val.
436 */
437 len = ctx.value.len;
438 p = ctx.value.ptr;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100439
Willy Tarreau9fed8582019-01-14 16:04:54 +0100440 if (!px->lbprm.arg_opt1) {
Bhaskar98634f02013-10-29 23:30:51 -0400441 hash = gen_hash(px, p, len);
Benoitaffb4812009-03-25 13:02:10 +0100442 } else {
443 int dohash = 0;
Cyril Bontéf607d812015-01-04 15:17:36 +0100444 p += len;
Benoitaffb4812009-03-25 13:02:10 +0100445 /* special computation, use only main domain name, not tld/host
446 * going back from the end of string, start hashing at first
447 * dot stop at next.
448 * This is designed to work with the 'Host' header, and requires
449 * a special option to activate this.
450 */
Cyril Bontéf607d812015-01-04 15:17:36 +0100451 end = p;
Benoitaffb4812009-03-25 13:02:10 +0100452 while (len) {
Cyril Bontéf607d812015-01-04 15:17:36 +0100453 if (dohash) {
454 /* Rewind the pointer until the previous char
455 * is a dot, this will allow to set the start
456 * position of the domain. */
457 if (*(p - 1) == '.')
Benoitaffb4812009-03-25 13:02:10 +0100458 break;
Benoitaffb4812009-03-25 13:02:10 +0100459 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100460 else if (*p == '.') {
461 /* The pointer is rewinded to the dot before the
462 * tld, we memorize the end of the domain and
463 * can enter the domain processing. */
464 end = p;
465 dohash = 1;
466 }
Benoitaffb4812009-03-25 13:02:10 +0100467 p--;
Cyril Bontéf607d812015-01-04 15:17:36 +0100468 len--;
Benoitaffb4812009-03-25 13:02:10 +0100469 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100470 start = p;
Bhaskar98634f02013-10-29 23:30:51 -0400471 hash = gen_hash(px, start, (end - start));
Benoitaffb4812009-03-25 13:02:10 +0100472 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500473 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100474 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200475 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100476 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100477 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200478 else
479 return map_get_server_hash(px, hash);
Benoitaffb4812009-03-25 13:02:10 +0100480}
481
Willy Tarreau34db1082012-04-19 17:16:54 +0200482/* RDP Cookie HASH. */
Willy Tarreau59884a62019-01-02 14:48:31 +0100483static struct server *get_server_rch(struct stream *s, const struct server *avoid)
Emeric Brun736aa232009-06-30 17:56:00 +0200484{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700485 unsigned int hash = 0;
Emeric Brun736aa232009-06-30 17:56:00 +0200486 struct proxy *px = s->be;
487 unsigned long len;
Emeric Brun736aa232009-06-30 17:56:00 +0200488 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +0200489 struct sample smp;
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200490 int rewind;
Emeric Brun736aa232009-06-30 17:56:00 +0200491
492 /* tot_weight appears to mean srv_count */
493 if (px->lbprm.tot_weight == 0)
494 return NULL;
495
Willy Tarreau37406352012-04-23 16:16:37 +0200496 memset(&smp, 0, sizeof(smp));
Emeric Brun736aa232009-06-30 17:56:00 +0200497
Willy Tarreau6a445eb2018-06-19 07:04:45 +0200498 rewind = co_data(&s->req);
499 c_rew(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200500
Willy Tarreau484ff072019-01-14 15:28:53 +0100501 ret = fetch_rdp_cookie_name(s, &smp, px->lbprm.arg_str, px->lbprm.arg_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200502 len = smp.data.u.str.data;
Willy Tarreau664092c2011-12-16 19:11:42 +0100503
Willy Tarreaubcbd3932018-06-06 07:13:22 +0200504 c_adv(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200505
Willy Tarreau37406352012-04-23 16:16:37 +0200506 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0)
Emeric Brun736aa232009-06-30 17:56:00 +0200507 return NULL;
508
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200509 /* note: we won't hash if there's only one server left */
510 if (px->lbprm.tot_used == 1)
511 goto hash_done;
512
Willy Tarreau484ff072019-01-14 15:28:53 +0100513 /* Found the param_name in the headers.
Emeric Brun736aa232009-06-30 17:56:00 +0200514 * we will compute the hash based on this value ctx.val.
515 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200516 hash = gen_hash(px, smp.data.u.str.area, len);
Bhaskar98634f02013-10-29 23:30:51 -0400517
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500518 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100519 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200520 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100521 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100522 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200523 else
524 return map_get_server_hash(px, hash);
Emeric Brun736aa232009-06-30 17:56:00 +0200525}
Christopher Faulet5b517552017-06-09 14:17:53 +0200526
Willy Tarreau760e81d2018-05-03 07:20:40 +0200527/* random value */
Willy Tarreau59884a62019-01-02 14:48:31 +0100528static struct server *get_server_rnd(struct stream *s, const struct server *avoid)
Willy Tarreau760e81d2018-05-03 07:20:40 +0200529{
530 unsigned int hash = 0;
531 struct proxy *px = s->be;
Willy Tarreau21c741a2019-01-14 18:14:27 +0100532 struct server *prev, *curr;
533 int draws = px->lbprm.arg_opt1; // number of draws
Willy Tarreau760e81d2018-05-03 07:20:40 +0200534
535 /* tot_weight appears to mean srv_count */
536 if (px->lbprm.tot_weight == 0)
537 return NULL;
538
Willy Tarreau21c741a2019-01-14 18:14:27 +0100539 curr = NULL;
540 do {
541 prev = curr;
542 /* ensure all 32 bits are covered as long as RAND_MAX >= 65535 */
543 hash = ((uint64_t)random() * ((uint64_t)RAND_MAX + 1)) ^ random();
544 curr = chash_get_server_hash(px, hash, avoid);
545 if (!curr)
546 break;
547
548 /* compare the new server to the previous best choice and pick
549 * the one with the least currently served requests.
550 */
551 if (prev && prev != curr &&
552 curr->served * prev->cur_eweight > prev->served * curr->cur_eweight)
553 curr = prev;
554 } while (--draws > 0);
555
556 return curr;
Willy Tarreau760e81d2018-05-03 07:20:40 +0200557}
558
Benoitaffb4812009-03-25 13:02:10 +0100559/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200560 * This function applies the load-balancing algorithm to the stream, as
561 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200562 * 'assigned'.
563 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200564 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200565 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100566 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200567 * The function tries to keep the original connection slot if it reconnects to
568 * the same server, otherwise it releases it and tries to offer it.
569 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200570 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200571 *
572 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100573 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200574 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
575 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200576 * SRV_STATUS_INTERNAL for other unrecoverable errors.
577 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200578 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100579 * it does not need to be called anymore. This means that target_srv(&s->target)
580 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200581 *
582 */
583
Willy Tarreau87b09662015-04-03 00:22:06 +0200584int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200585{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100586 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200587 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100588 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200589 int err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100590
Simon Horman8effd3d2011-08-13 08:03:52 +0900591 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200592
Willy Tarreau7c669d72008-06-20 15:04:11 +0200593 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200594 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200595 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100596
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100597 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200598 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200599
Willy Tarreau7c669d72008-06-20 15:04:11 +0200600 /* We have to release any connection slot before applying any LB algo,
601 * otherwise we may erroneously end up with no available slot.
602 */
603 if (conn_slot)
604 sess_change_server(s, NULL);
605
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100606 /* We will now try to find the good server and store it into <objt_server(s->target)>.
607 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200608 * as well as if no server is available (check error code).
609 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100610
Willy Tarreau827aee92011-03-10 16:55:02 +0100611 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100612 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100613
Olivier Houchardba4fff52018-12-01 14:40:40 +0100614 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200615 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100616 (s->be->options & PR_O_PREF_LAST))) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100617 struct sess_srv_list *srv_list;
618 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
619 struct server *tmpsrv = objt_server(srv_list->target);
Olivier Houchardba4fff52018-12-01 14:40:40 +0100620
621 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200622 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100623 (!s->be->max_ka_queue ||
624 server_has_room(tmpsrv) || (
625 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
626 srv_currently_usable(tmpsrv)) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100627 list_for_each_entry(conn, &srv_list->conn_list, session_list) {
Olivier Houchardba4fff52018-12-01 14:40:40 +0100628 if (conn->flags & CO_FL_CONNECTED) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100629
Olivier Houchardba4fff52018-12-01 14:40:40 +0100630 srv = tmpsrv;
631 s->target = &srv->obj_type;
632 goto out_ok;
633 }
634 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100635 }
636 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100637 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100638 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200639
Willy Tarreau7c669d72008-06-20 15:04:11 +0200640 /* we must check if we have at least one server available */
641 if (!s->be->lbprm.tot_weight) {
642 err = SRV_STATUS_NOSRV;
643 goto out;
644 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200645
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200646 /* First check whether we need to fetch some data or simply call
647 * the LB lookup function. Only the hashing functions will need
648 * some input data in fact, and will support multiple algorithms.
649 */
650 switch (s->be->lbprm.algo & BE_LB_LKUP) {
651 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100652 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200653 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200654
Willy Tarreauf09c6602012-02-13 17:12:08 +0100655 case BE_LB_LKUP_FSTREE:
656 srv = fas_get_next_server(s->be, prev_srv);
657 break;
658
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200659 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100660 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200661 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200662
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200663 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200664 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200665 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200666 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
Willy Tarreau59884a62019-01-02 14:48:31 +0100667 srv = get_server_rnd(s, prev_srv);
Willy Tarreau6c30be52019-01-14 17:07:39 +0100668 else if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100669 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200670 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100671 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200672 break;
673 }
674 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200675 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200676 err = SRV_STATUS_INTERNAL;
677 goto out;
678 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200679
680 switch (s->be->lbprm.algo & BE_LB_PARM) {
681 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200682 conn = objt_conn(strm_orig(s));
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200683 if (conn && conn_get_src(conn) && conn->src->ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200684 srv = get_server_sh(s->be,
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200685 (void *)&((struct sockaddr_in *)conn->src)->sin_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100686 4, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200687 }
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200688 else if (conn && conn_get_src(conn) && conn->src->ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200689 srv = get_server_sh(s->be,
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200690 (void *)&((struct sockaddr_in6 *)conn->src)->sin6_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100691 16, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200692 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200693 else {
694 /* unknown IP family */
695 err = SRV_STATUS_INTERNAL;
696 goto out;
697 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200698 break;
699
700 case BE_LB_HASH_URI:
701 /* URI hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200702 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100703 struct ist uri;
704
Christopher Faulet297fbb42019-05-13 14:41:27 +0200705 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100706 srv = get_server_uh(s->be, uri.ptr, uri.len, prev_srv);
707 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200708 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200709
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200710 case BE_LB_HASH_PRM:
711 /* URL Parameter hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200712 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100713 struct ist uri;
714
Christopher Faulet297fbb42019-05-13 14:41:27 +0200715 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100716 srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv);
Willy Tarreau61a21a32011-03-01 20:35:49 +0100717
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200718 if (!srv && s->txn->meth == HTTP_METH_POST)
719 srv = get_server_ph_post(s, prev_srv);
720 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200721 break;
Benoitaffb4812009-03-25 13:02:10 +0100722
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200723 case BE_LB_HASH_HDR:
724 /* Header Parameter hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200725 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY)
726 srv = get_server_hh(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200727 break;
728
729 case BE_LB_HASH_RDP:
730 /* RDP Cookie hashing */
Willy Tarreau59884a62019-01-02 14:48:31 +0100731 srv = get_server_rch(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200732 break;
733
734 default:
735 /* unknown balancing algorithm */
736 err = SRV_STATUS_INTERNAL;
737 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100738 }
Emeric Brun736aa232009-06-30 17:56:00 +0200739
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200740 /* If the hashing parameter was not found, let's fall
741 * back to round robin on the map.
742 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100743 if (!srv) {
Willy Tarreau6c30be52019-01-14 17:07:39 +0100744 if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100745 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200746 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100747 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200748 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200749
750 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200751 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200752
Willy Tarreau7c669d72008-06-20 15:04:11 +0200753 default:
754 /* unknown balancing algorithm */
755 err = SRV_STATUS_INTERNAL;
756 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200757 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200758
Willy Tarreau827aee92011-03-10 16:55:02 +0100759 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200760 err = SRV_STATUS_FULL;
761 goto out;
762 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100763 else if (srv != prev_srv) {
Olivier Houchard237f7812019-03-08 18:49:07 +0100764 _HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
765 _HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100766 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100767 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200768 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200769 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100770 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200771 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100772 else if ((s->be->options & PR_O_HTTP_PROXY)) {
773 conn = cs_conn(objt_cs(s->si[1].end));
774
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200775 if (conn && conn->dst && is_addr(conn->dst)) {
Olivier Houchard2442f682018-12-01 17:03:38 +0100776 /* in proxy mode, we need a valid destination address */
777 s->target = &s->be->obj_type;
778 } else {
779 err = SRV_STATUS_NOSRV;
780 goto out;
781 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100782 }
783 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200784 err = SRV_STATUS_NOSRV;
785 goto out;
786 }
787
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100788out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200789 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200790 err = SRV_STATUS_OK;
791 out:
792
793 /* Either we take back our connection slot, or we offer it to someone
794 * else if we don't need it anymore.
795 */
796 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100797 if (conn_slot == srv) {
798 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200799 } else {
800 if (may_dequeue_tasks(conn_slot, s->be))
801 process_srv_queue(conn_slot);
802 }
803 }
804
805 out_err:
806 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200807}
808
Willy Tarreaubaaee002006-06-26 02:48:02 +0200809/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200810 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200811 * The address is taken from the currently assigned server, or from the
812 * dispatch or transparent address.
813 *
814 * It may return :
815 * SRV_STATUS_OK if everything is OK.
816 * SRV_STATUS_INTERNAL for other unrecoverable errors.
817 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200818 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200819 * not cleared, so it's to the caller to clear it if required.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200820 */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200821int assign_server_address(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200822{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200823 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200824
Christopher Faulet56803b12017-11-24 16:06:18 +0100825 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200826
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200827 if (!sockaddr_alloc(&s->target_addr))
Willy Tarreauca79f592019-07-17 19:04:47 +0200828 return SRV_STATUS_INTERNAL;
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200829
Willy Tarreaue7dff022015-04-03 01:14:29 +0200830 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200831 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200832 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200833 return SRV_STATUS_INTERNAL;
834
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200835 *s->target_addr = __objt_server(s->target)->addr;
836 set_host_port(s->target_addr, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200837
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200838 if (!is_addr(s->target_addr) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200839 /* if the server has no address, we use the same address
840 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200841 * locally on multiple addresses at once. Nothing is done
842 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200843 */
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200844 if (!conn_get_dst(cli_conn)) {
845 /* do nothing if we can't retrieve the address */
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200846 } else if (cli_conn->dst->ss_family == AF_INET) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200847 ((struct sockaddr_in *)s->target_addr)->sin_addr = ((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200848 } else if (cli_conn->dst->ss_family == AF_INET6) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200849 ((struct sockaddr_in6 *)s->target_addr)->sin6_addr = ((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr;
Emeric Brunec810d12010-10-22 16:36:33 +0200850 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200851 }
852
Willy Tarreaubaaee002006-06-26 02:48:02 +0200853 /* if this server remaps proxied ports, we'll use
854 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +0200855 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +0100856 int base_port;
857
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200858 if (conn_get_dst(cli_conn)) {
859 /* First, retrieve the port from the incoming connection */
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200860 base_port = get_host_port(cli_conn->dst);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100861
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200862 /* Second, assign the outgoing connection's port */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200863 base_port += get_host_port(s->target_addr);
864 set_host_port(s->target_addr, base_port);
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200865 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200866 }
867 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200868 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200869 /* connect to the defined dispatch addr */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200870 *s->target_addr = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200871 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200872 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200873 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200874 if (conn_get_dst(cli_conn) &&
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200875 (cli_conn->dst->ss_family == AF_INET || cli_conn->dst->ss_family == AF_INET6))
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200876 *s->target_addr = *cli_conn->dst;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200877 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100878 else if (s->be->options & PR_O_HTTP_PROXY) {
879 /* If HTTP PROXY option is set, then server is already assigned
880 * during incoming client request parsing. */
881 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +0100882 else {
883 /* no server and no LB algorithm ! */
884 return SRV_STATUS_INTERNAL;
885 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200886
Willy Tarreaue7dff022015-04-03 01:14:29 +0200887 s->flags |= SF_ADDR_SET;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200888 return SRV_STATUS_OK;
889}
890
Willy Tarreau87b09662015-04-03 00:22:06 +0200891/* This function assigns a server to stream <s> if required, and can add the
Willy Tarreaubaaee002006-06-26 02:48:02 +0200892 * connection to either the assigned server's queue or to the proxy's queue.
Willy Tarreau87b09662015-04-03 00:22:06 +0200893 * If ->srv_conn is set, the stream is first released from the server.
Willy Tarreaue7dff022015-04-03 01:14:29 +0200894 * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will
Willy Tarreau7c669d72008-06-20 15:04:11 +0200895 * be called before any connection and after any retry or redispatch occurs.
896 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200897 * It is not allowed to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200898 *
899 * Returns :
900 *
901 * SRV_STATUS_OK if everything is OK.
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100902 * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200903 * SRV_STATUS_QUEUED if the connection has been queued.
904 * SRV_STATUS_FULL if the server(s) is/are saturated and the
Willy Tarreau827aee92011-03-10 16:55:02 +0100905 * connection could not be queued at the server's,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200906 * which may be NULL if we queue on the backend.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200907 * SRV_STATUS_INTERNAL for other unrecoverable errors.
908 *
909 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200910int assign_server_and_queue(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200911{
912 struct pendconn *p;
Willy Tarreau827aee92011-03-10 16:55:02 +0100913 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200914 int err;
915
916 if (s->pend_pos)
917 return SRV_STATUS_INTERNAL;
918
Willy Tarreau7c669d72008-06-20 15:04:11 +0200919 err = SRV_STATUS_OK;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200920 if (!(s->flags & SF_ASSIGNED)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100921 struct server *prev_srv = objt_server(s->target);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100922
Willy Tarreau7c669d72008-06-20 15:04:11 +0200923 err = assign_server(s);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100924 if (prev_srv) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200925 /* This stream was previously assigned to a server. We have to
926 * update the stream's and the server's stats :
Willy Tarreau7c669d72008-06-20 15:04:11 +0200927 * - if the server changed :
928 * - set TX_CK_DOWN if txn.flags was TX_CK_VALID
Willy Tarreaue7dff022015-04-03 01:14:29 +0200929 * - set SF_REDISP if it was successfully redispatched
Willy Tarreau7c669d72008-06-20 15:04:11 +0200930 * - increment srv->redispatches and be->redispatches
931 * - if the server remained the same : update retries.
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100932 */
933
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100934 if (prev_srv != objt_server(s->target)) {
Willy Tarreaueee5b512015-04-03 23:46:31 +0200935 if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) {
936 s->txn->flags &= ~TX_CK_MASK;
937 s->txn->flags |= TX_CK_DOWN;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200938 }
Willy Tarreaue7dff022015-04-03 01:14:29 +0200939 s->flags |= SF_REDISP;
Olivier Houchard237f7812019-03-08 18:49:07 +0100940 _HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
941 _HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200942 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +0100943 _HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
944 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100945 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100946 }
947 }
948
Willy Tarreaubaaee002006-06-26 02:48:02 +0200949 switch (err) {
950 case SRV_STATUS_OK:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200951 /* we have SF_ASSIGNED set */
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100952 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +0100953 if (!srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200954 return SRV_STATUS_OK; /* dispatch or proxy mode */
955
956 /* If we already have a connection slot, no need to check any queue */
Willy Tarreau827aee92011-03-10 16:55:02 +0100957 if (s->srv_conn == srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200958 return SRV_STATUS_OK;
959
Willy Tarreau87b09662015-04-03 00:22:06 +0200960 /* OK, this stream already has an assigned server, but no
Willy Tarreau7c669d72008-06-20 15:04:11 +0200961 * connection slot yet. Either it is a redispatch, or it was
962 * assigned from persistence information (direct mode).
963 */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200964 if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200965 /* server scheduled for redirection, and already assigned. We
966 * don't want to go further nor check the queue.
Willy Tarreau21d2af32008-02-14 20:25:24 +0100967 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100968 sess_change_server(s, srv); /* not really needed in fact */
Willy Tarreau21d2af32008-02-14 20:25:24 +0100969 return SRV_STATUS_OK;
970 }
971
Willy Tarreau87b09662015-04-03 00:22:06 +0200972 /* We might have to queue this stream if the assigned server is full.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200973 * We know we have to queue it into the server's queue, so if a maxqueue
974 * is set on the server, we must also check that the server's queue is
975 * not full, in which case we have to return FULL.
976 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100977 if (srv->maxconn &&
978 (srv->nbpend || srv->served >= srv_dynamic_maxconn(srv))) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200979
Willy Tarreau827aee92011-03-10 16:55:02 +0100980 if (srv->maxqueue > 0 && srv->nbpend >= srv->maxqueue)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200981 return SRV_STATUS_FULL;
982
Willy Tarreaubaaee002006-06-26 02:48:02 +0200983 p = pendconn_add(s);
984 if (p)
985 return SRV_STATUS_QUEUED;
986 else
Willy Tarreau7c669d72008-06-20 15:04:11 +0200987 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200988 }
Willy Tarreau7c669d72008-06-20 15:04:11 +0200989
990 /* OK, we can use this server. Let's reserve our place */
Willy Tarreau827aee92011-03-10 16:55:02 +0100991 sess_change_server(s, srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200992 return SRV_STATUS_OK;
993
994 case SRV_STATUS_FULL:
Willy Tarreau87b09662015-04-03 00:22:06 +0200995 /* queue this stream into the proxy's queue */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200996 p = pendconn_add(s);
997 if (p)
998 return SRV_STATUS_QUEUED;
999 else
Willy Tarreau7c669d72008-06-20 15:04:11 +02001000 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001001
1002 case SRV_STATUS_NOSRV:
Willy Tarreau7c669d72008-06-20 15:04:11 +02001003 return err;
1004
Willy Tarreaubaaee002006-06-26 02:48:02 +02001005 case SRV_STATUS_INTERNAL:
1006 return err;
Willy Tarreau7c669d72008-06-20 15:04:11 +02001007
Willy Tarreaubaaee002006-06-26 02:48:02 +02001008 default:
1009 return SRV_STATUS_INTERNAL;
1010 }
Willy Tarreau5b6995c2008-01-13 16:31:17 +01001011}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001012
Willy Tarreaub1d67742010-03-29 19:36:59 +02001013/* If an explicit source binding is specified on the server and/or backend, and
1014 * this source makes use of the transparent proxy, then it is extracted now and
Willy Tarreau87b09662015-04-03 00:22:06 +02001015 * assigned to the stream's pending connection. This function assumes that an
Willy Tarreau350f4872014-11-28 14:42:25 +01001016 * outgoing connection has already been assigned to s->si[1].end.
Willy Tarreaub1d67742010-03-29 19:36:59 +02001017 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001018static void assign_tproxy_address(struct stream *s)
Willy Tarreaub1d67742010-03-29 19:36:59 +02001019{
Willy Tarreau29fbe512015-08-20 19:35:14 +02001020#if defined(CONFIG_HAP_TRANSPARENT)
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001021 struct server *srv = objt_server(s->target);
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001022 struct conn_src *src;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001023 struct connection *cli_conn;
Olivier Houchard09a0f032019-01-17 15:59:13 +01001024 struct connection *srv_conn;
1025
1026 if (objt_cs(s->si[1].end))
1027 srv_conn = cs_conn(__objt_cs(s->si[1].end));
1028 else
1029 srv_conn = objt_conn(s->si[1].end);
Willy Tarreau827aee92011-03-10 16:55:02 +01001030
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001031 if (srv && srv->conn_src.opts & CO_SRC_BIND)
1032 src = &srv->conn_src;
1033 else if (s->be->conn_src.opts & CO_SRC_BIND)
1034 src = &s->be->conn_src;
1035 else
1036 return;
Willy Tarreau294c4732011-12-16 21:35:50 +01001037
Willy Tarreauca79f592019-07-17 19:04:47 +02001038 if (!sockaddr_alloc(&srv_conn->src))
1039 return;
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001040
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001041 switch (src->opts & CO_SRC_TPROXY_MASK) {
1042 case CO_SRC_TPROXY_ADDR:
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001043 *srv_conn->src = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001044 break;
1045 case CO_SRC_TPROXY_CLI:
1046 case CO_SRC_TPROXY_CIP:
1047 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001048 cli_conn = objt_conn(strm_orig(s));
Willy Tarreau3cc01d82019-07-17 11:27:38 +02001049 if (cli_conn && conn_get_src(cli_conn))
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001050 *srv_conn->src = *cli_conn->src;
1051 else {
Willy Tarreau16aa4af2019-07-18 11:16:41 +02001052 sockaddr_free(&srv_conn->src);
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001053 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001054 break;
1055 case CO_SRC_TPROXY_DYN:
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001056 if (src->bind_hdr_occ && IS_HTX_STRM(s)) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001057 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001058 size_t vlen;
Willy Tarreau294c4732011-12-16 21:35:50 +01001059
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001060 /* bind to the IP in a header */
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001061 ((struct sockaddr_in *)srv_conn->src)->sin_family = AF_INET;
1062 ((struct sockaddr_in *)srv_conn->src)->sin_port = 0;
1063 ((struct sockaddr_in *)srv_conn->src)->sin_addr.s_addr = 0;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001064 if (http_get_htx_hdr(htxbuf(&s->req.buf),
1065 ist2(src->bind_hdr_name, src->bind_hdr_len),
1066 src->bind_hdr_occ, NULL, &vptr, &vlen)) {
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001067 ((struct sockaddr_in *)srv_conn->src)->sin_addr.s_addr =
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001068 htonl(inetaddr_host_lim(vptr, vptr + vlen));
Willy Tarreaubce70882009-09-07 11:51:47 +02001069 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001070 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001071 break;
1072 default:
Willy Tarreau16aa4af2019-07-18 11:16:41 +02001073 sockaddr_free(&srv_conn->src);
Willy Tarreaub1d67742010-03-29 19:36:59 +02001074 }
1075#endif
1076}
1077
Lukas Tribusda95fd92018-11-25 13:21:27 +01001078#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001079/*
1080 * Pick the right mux once the connection is established, we should now have
Willy Tarreau94031d32018-12-19 14:36:29 +01001081 * an alpn if available, so we are now able to choose. In this specific case
1082 * the connection's context is &si[i].end.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001083 */
1084static int conn_complete_server(struct connection *conn)
1085{
1086 struct conn_stream *cs = NULL;
Willy Tarreau94031d32018-12-19 14:36:29 +01001087 struct stream *s = container_of(conn->ctx, struct stream, si[1].end);
Olivier Houchardbf024f02018-11-29 17:08:53 +01001088 struct server *srv;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001089
Olivier Houchard70d9b2f2018-11-29 16:57:32 +01001090 task_wakeup(s->task, TASK_WOKEN_IO);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001091 conn_clear_xprt_done_cb(conn);
1092 /* Verify if the connection just established. */
1093 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED))))
1094 conn->flags |= CO_FL_CONNECTED;
1095
Olivier Houchard201b9f42018-11-21 00:16:29 +01001096 if (conn->flags & CO_FL_ERROR)
1097 goto fail;
Olivier Houchardd76bd2d2018-11-29 16:58:49 +01001098 si_detach_endpoint(&s->si[1]);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001099 cs = si_alloc_cs(&s->si[1], conn);
1100 if (!cs)
1101 goto fail;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001102 if (conn_install_mux_be(conn, cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001103 goto fail;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001104 srv = objt_server(s->target);
Olivier Houchard7aec9ed2018-12-14 19:31:51 +01001105 if (srv && ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
Olivier Houchardbf024f02018-11-29 17:08:53 +01001106 conn->mux->avail_streams(conn) > 0)
1107 LIST_ADD(&srv->idle_conns[tid], &conn->list);
1108
Olivier Houchard201b9f42018-11-21 00:16:29 +01001109 return 0;
1110
1111fail:
Willy Tarreaud8220132019-01-28 16:33:35 +01001112 si_detach_endpoint(&s->si[1]);
1113
Olivier Houchard201b9f42018-11-21 00:16:29 +01001114 if (cs)
1115 cs_free(cs);
1116 /* kill the connection now */
1117 conn_stop_tracking(conn);
1118 conn_full_close(conn);
1119 conn_free(conn);
Olivier Houchard4f417512018-12-27 18:59:46 +01001120 /* Let process_stream know it went wrong */
1121 s->si[1].flags |= SI_FL_ERR;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001122 return -1;
1123}
Olivier Houchardc6e0bb42018-11-23 14:24:10 +01001124#endif
Olivier Houchard201b9f42018-11-21 00:16:29 +01001125
Willy Tarreaub1d67742010-03-29 19:36:59 +02001126
Willy Tarreaubaaee002006-06-26 02:48:02 +02001127/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001128 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001129 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001130 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001131 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001132 * - SF_ERR_NONE if everything's OK
1133 * - SF_ERR_SRVTO if there are no more servers
1134 * - SF_ERR_SRVCL if the connection was refused by the server
1135 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1136 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1137 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001138 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001139 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001140 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001141 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001142int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001143{
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001144 struct connection *cli_conn = objt_conn(strm_orig(s));
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001145 struct connection *srv_conn = NULL;
1146 struct connection *old_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001147 struct conn_stream *srv_cs = NULL;
Willy Tarreaub0821862019-07-18 19:26:11 +02001148 struct sess_srv_list *srv_list;
Willy Tarreau827aee92011-03-10 16:55:02 +01001149 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001150 int reuse = 0;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001151 int reuse_orphan = 0;
Olivier Houchard5cd62172019-01-04 15:52:26 +01001152 int init_mux = 0;
Olivier Houchard4dc85532019-01-29 15:50:38 +01001153 int alloced_cs = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001154 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001155
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001156
Willy Tarreaua5797aa2019-07-18 18:40:06 +02001157 /* This will catch some corner cases such as lying connections resulting from
1158 * retries or connect timeouts but will rarely trigger.
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001159 */
Willy Tarreaua5797aa2019-07-18 18:40:06 +02001160 si_release_endpoint(&s->si[1]);
1161
Willy Tarreaub0821862019-07-18 19:26:11 +02001162 /* first, search for a matching connection in the session's idle conns */
1163 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
1164 if (srv_list->target == s->target) {
1165 list_for_each_entry(srv_conn, &srv_list->conn_list, session_list) {
1166 if (conn_xprt_ready(srv_conn) &&
1167 srv_conn->mux && (srv_conn->mux->avail_streams(srv_conn) > 0)) {
1168 reuse = 1;
1169 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001170 }
1171 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001172 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001173 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001174 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001175
Willy Tarreaub0821862019-07-18 19:26:11 +02001176 if (!reuse) {
1177 /* no connection was found in our session's list. Pick any
1178 * random one that we could trade against another one.
1179 */
1180 srv_conn = NULL;
1181 if (!LIST_ISEMPTY(&s->sess->srv_list)) {
1182 srv_list = LIST_ELEM(s->sess->srv_list.n, struct sess_srv_list *, srv_list);
1183 if (!LIST_ISEMPTY(&srv_list->conn_list))
1184 srv_conn = LIST_ELEM(srv_list->conn_list.n, struct connection *, session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001185 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001186
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001187 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001188 /* OK at this point we have this :
1189 * - srv_conn points to an existing connection or NULL
1190 * - if reuse is set, srv_conn holds a valid connection, otherwise it
1191 * points to any of our old connections we may want to trade against
1192 * another one
1193 */
1194
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001195 old_conn = srv_conn;
1196
Willy Tarreau7b004922015-08-04 19:34:21 +02001197 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001198
Willy Tarreau8dff9982015-08-04 20:45:52 +02001199 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001200 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001201
Willy Tarreau449d74a2015-08-05 17:16:33 +02001202 /* Below we pick connections from the safe or idle lists based
1203 * on the strategy, the fact that this is a first or second
1204 * (retryable) request, with the indicated priority (1 or 2) :
1205 *
1206 * SAFE AGGR ALWS
1207 *
1208 * +-----+-----+ +-----+-----+ +-----+-----+
1209 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1210 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1211 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1212 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1213 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1214 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
Willy Tarreaub0821862019-07-18 19:26:11 +02001215 *
1216 * Idle conns are necessarily looked up on the same thread so
1217 * that there is no concurrency issues.
Willy Tarreau449d74a2015-08-05 17:16:33 +02001218 */
Christopher Faulet40a007c2017-07-03 15:41:01 +02001219 if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001220 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1221 s->txn && (s->txn->flags & TX_NOT_FIRST))) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001222 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001223 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001224 else if (srv->safe_conns && !LIST_ISEMPTY(&srv->safe_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001225 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1226 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR)) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001227 srv_conn = LIST_ELEM(srv->safe_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001228 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001229 else if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001230 (s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001231 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Olivier Houchard859dc802019-08-08 15:47:21 +02001232 } else if (srv->idle_orphan_conns && !MT_LIST_ISEMPTY(&srv->idle_orphan_conns[tid]) &&
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001233 (((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) ||
1234 (((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
1235 s->txn && (s->txn->flags & TX_NOT_FIRST)))) {
Olivier Houchard859dc802019-08-08 15:47:21 +02001236 srv_conn = MT_LIST_POP(&srv->idle_orphan_conns[tid],
Willy Tarreauc912f942019-02-28 16:06:56 +01001237 struct connection *, list);
1238 if (srv_conn)
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001239 reuse_orphan = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001240 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001241
Willy Tarreau449d74a2015-08-05 17:16:33 +02001242 /* If we've picked a connection from the pool, we now have to
1243 * detach it. We may have to get rid of the previous idle
1244 * connection we had, so for this we try to swap it with the
1245 * other owner's. That way it may remain alive for others to
1246 * pick.
1247 */
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001248 if (srv_conn)
Willy Tarreau8dff9982015-08-04 20:45:52 +02001249 reuse = 1;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001250 }
1251
Willy Tarreaub0821862019-07-18 19:26:11 +02001252
1253 /* here reuse might have been set above, indicating srv_conn finally
1254 * is OK.
1255 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001256 if (reuse) {
1257 /* Disable connection reuse if a dynamic source is used.
1258 * As long as we don't share connections between servers,
1259 * we don't need to disable connection reuse on no-idempotent
1260 * requests nor when PROXY protocol is used.
1261 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001262 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1263 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1264 reuse = 0;
1265 }
1266 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1267 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1268 reuse = 0;
1269 }
1270 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001271
Olivier Houchard14fcc2e2019-06-05 13:55:01 +02001272 if (((!reuse || (srv_conn && !(srv_conn->flags & CO_FL_CONNECTED)))
Christopher Faulet1dbc4672019-09-13 10:01:36 +02001273 && ha_used_fds > global.tune.pool_high_count) && srv && srv->idle_orphan_conns) {
Olivier Houchard88698d92019-04-16 19:07:22 +02001274 struct connection *tokill_conn;
1275
1276 /* We can't reuse a connection, and e have more FDs than deemd
1277 * acceptable, attempt to kill an idling connection
1278 */
1279 /* First, try from our own idle list */
Olivier Houchard859dc802019-08-08 15:47:21 +02001280 tokill_conn = MT_LIST_POP(&srv->idle_orphan_conns[tid],
Olivier Houchard88698d92019-04-16 19:07:22 +02001281 struct connection *, list);
1282 if (tokill_conn)
1283 tokill_conn->mux->destroy(tokill_conn->ctx);
1284 /* If not, iterate over other thread's idling pool, and try to grab one */
1285 else {
1286 int i;
1287
1288 for (i = 0; i < global.nbthread; i++) {
1289 if (i == tid)
1290 continue;
Willy Tarreau08e2b412019-05-26 11:50:08 +02001291
1292 // just silence stupid gcc which reports an absurd
1293 // out-of-bounds warning for <i> which is always
1294 // exactly zero without threads, but it seems to
1295 // see it possibly larger.
1296 ALREADY_CHECKED(i);
1297
Olivier Houchard859dc802019-08-08 15:47:21 +02001298 tokill_conn = MT_LIST_POP(&srv->idle_orphan_conns[i],
Olivier Houchard88698d92019-04-16 19:07:22 +02001299 struct connection *, list);
1300 if (tokill_conn) {
1301 /* We got one, put it into the concerned thread's to kill list, and wake it's kill task */
1302
Olivier Houchard859dc802019-08-08 15:47:21 +02001303 MT_LIST_ADDQ(&toremove_connections[i],
1304 (struct mt_list *)&tokill_conn->list);
Olivier Houchard88698d92019-04-16 19:07:22 +02001305 task_wakeup(idle_conn_cleanup[i], TASK_WOKEN_OTHER);
1306 break;
1307 }
1308 }
1309 }
1310
1311 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001312 /* If we're really reusing the connection, remove it from the orphan
1313 * list and add it back to the idle list.
1314 */
Christopher Faulet46451d62019-04-19 15:39:22 +02001315 if (reuse) {
1316 if (reuse_orphan) {
1317 srv_conn->idle_time = 0;
1318 _HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
1319 __ha_barrier_atomic_store();
1320 srv->curr_idle_thr[tid]--;
1321 LIST_ADDQ(&srv->idle_conns[tid], &srv_conn->list);
1322 }
1323 else {
1324 if (srv_conn->flags & CO_FL_SESS_IDLE) {
1325 struct session *sess = srv_conn->owner;
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001326
Christopher Faulet46451d62019-04-19 15:39:22 +02001327 srv_conn->flags &= ~CO_FL_SESS_IDLE;
1328 sess->idle_conns--;
1329 }
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001330 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001331 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001332
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001333 /* We're about to use another connection, let the mux know we're
Willy Tarreaub0821862019-07-18 19:26:11 +02001334 * done with this one.
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001335 */
Olivier Houchardc685d702018-12-28 16:20:25 +01001336 if (old_conn != srv_conn && old_conn && reuse && !reuse_orphan) {
1337 struct session *sess = srv_conn->owner;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001338
Olivier Houchardc685d702018-12-28 16:20:25 +01001339 if (sess) {
1340 if (old_conn && !(old_conn->flags & CO_FL_PRIVATE) &&
1341 old_conn->mux != NULL) {
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001342 if (old_conn->flags & CO_FL_SESS_IDLE)
1343 s->sess->idle_conns--;
Olivier Houchardc685d702018-12-28 16:20:25 +01001344 session_unown_conn(s->sess, old_conn);
1345 old_conn->owner = sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001346 if (!session_add_conn(sess, old_conn, old_conn->target)) {
Olivier Houcharda48237f2019-05-02 12:04:15 +02001347 old_conn->flags &= ~CO_FL_SESS_IDLE;
Olivier Houchardc685d702018-12-28 16:20:25 +01001348 old_conn->owner = NULL;
Christopher Faulet73c12072019-04-08 11:23:22 +02001349 old_conn->mux->destroy(old_conn->ctx);
Olivier Houchardc685d702018-12-28 16:20:25 +01001350 } else
1351 session_check_idle_conn(sess, old_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001352 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001353 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001354 }
1355
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001356 if (reuse) {
Willy Tarreaub0821862019-07-18 19:26:11 +02001357 if (srv_conn->mux) {
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001358 int avail = srv_conn->mux->avail_streams(srv_conn);
1359
1360 if (avail <= 1) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001361 /* No more streams available, remove it from the list */
1362 LIST_DEL(&srv_conn->list);
1363 LIST_INIT(&srv_conn->list);
1364 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001365
1366 if (avail >= 1) {
1367 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001368 if (srv_cs) {
1369 alloced_cs = 1;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001370 si_attach_cs(&s->si[1], srv_cs);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001371 } else
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001372 srv_conn = NULL;
1373 }
Olivier Houchard134a2042018-12-28 14:45:47 +01001374 else
1375 srv_conn = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001376 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001377 /* otherwise srv_conn is left intact */
1378 }
1379 else
1380 srv_conn = NULL;
1381
1382 /* no reuse or failed to reuse the connection above, pick a new one */
1383 if (!srv_conn) {
1384 srv_conn = conn_new();
Willy Tarreau1da41ec2019-02-01 16:38:48 +01001385 if (srv_conn)
1386 srv_conn->target = s->target;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001387 srv_cs = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001388 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001389
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001390 if (srv_conn && old_conn != srv_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001391 if (srv_conn->owner)
1392 session_unown_conn(srv_conn->owner, srv_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001393 srv_conn->owner = s->sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001394 if (!session_add_conn(s->sess, srv_conn, srv_conn->target)) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001395 /* If we failed to attach the connection, detach the
1396 * conn_stream, possibly destroying the connection */
Olivier Houchard4dc85532019-01-29 15:50:38 +01001397 if (alloced_cs)
1398 si_release_endpoint(&s->si[1]);
Olivier Houchard351411f2018-12-27 17:20:54 +01001399 srv_conn->owner = NULL;
Olivier Houchard26da3232019-01-29 16:05:02 +01001400 if (srv_conn->mux && !srv_add_to_idle_list(objt_server(srv_conn->target), srv_conn))
Olivier Houchard351411f2018-12-27 17:20:54 +01001401 /* The server doesn't want it, let's kill the connection right away */
Christopher Faulet73c12072019-04-08 11:23:22 +02001402 srv_conn->mux->destroy(srv_conn->ctx);
Olivier Houchard351411f2018-12-27 17:20:54 +01001403 srv_conn = NULL;
1404
1405 }
Willy Tarreau323a2d92015-08-04 19:00:17 +02001406 }
Willy Tarreauc12b5e62015-08-04 19:45:36 +02001407
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001408 if (!srv_conn || !sockaddr_alloc(&srv_conn->dst))
Willy Tarreaue7dff022015-04-03 01:14:29 +02001409 return SF_ERR_RESOURCE;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001410
Willy Tarreaue7dff022015-04-03 01:14:29 +02001411 if (!(s->flags & SF_ADDR_SET)) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001412 err = assign_server_address(s);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001413 if (err != SRV_STATUS_OK)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001414 return SF_ERR_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001415 }
1416
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001417 /* copy the target address into the connection */
1418 *srv_conn->dst = *s->target_addr;
1419
1420 /* Copy network namespace from client connection */
1421 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
1422
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001423 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreauff605db2013-12-20 11:09:51 +01001424 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001425 if (srv)
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001426 conn_prepare(srv_conn, protocol_by_family(srv_conn->dst->ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001427 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1428 /* proxies exclusively run on raw_sock right now */
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001429 conn_prepare(srv_conn, protocol_by_family(srv_conn->dst->ss_family), xprt_get(XPRT_RAW));
Olivier Houchard12950162018-11-23 14:32:08 +01001430 if (!(srv_conn->ctrl))
Willy Tarreaue7dff022015-04-03 01:14:29 +02001431 return SF_ERR_INTERNAL;
Willy Tarreauff605db2013-12-20 11:09:51 +01001432 }
1433 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001434 return SF_ERR_INTERNAL; /* how did we get there ? */
Willy Tarreaud02394b2012-05-11 18:32:18 +02001435
Lukas Tribusda95fd92018-11-25 13:21:27 +01001436#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001437 if (!srv ||
1438 ((!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
Olivier Houchardb4a8b2c2019-06-15 00:13:15 +02001439 srv->mux_proto || s->be->mode != PR_MODE_HTTP))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001440#endif
1441 {
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001442 srv_cs = objt_cs(s->si[1].end);
1443 if (!srv_cs || srv_cs->conn != srv_conn)
1444 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001445 if (!srv_cs) {
1446 conn_free(srv_conn);
1447 return SF_ERR_RESOURCE;
1448 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001449 init_mux = 1;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001450 }
Lukas Tribusda95fd92018-11-25 13:21:27 +01001451#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001452 else {
Willy Tarreau94031d32018-12-19 14:36:29 +01001453 srv_conn->ctx = &s->si[1].end;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001454 /* Store the connection into the stream interface,
1455 * while we still don't have a mux, so that if the
1456 * stream is destroyed before the connection is
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001457 * established, we have a chance to destroy it even
1458 * if it is no longer referenced in the session.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001459 */
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001460 s->si[1].end = &srv_conn->obj_type;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001461 conn_set_xprt_done_cb(srv_conn, conn_complete_server);
1462 }
1463
1464#endif
Willy Tarreauff605db2013-12-20 11:09:51 +01001465 /* process the case where the server requires the PROXY protocol to be sent */
1466 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001467
Willy Tarreau7b004922015-08-04 19:34:21 +02001468 if (srv && srv->pp_opts) {
Willy Tarreau387ebf82015-08-04 19:24:13 +02001469 srv_conn->flags |= CO_FL_PRIVATE;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001470 srv_conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreauff605db2013-12-20 11:09:51 +01001471 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001472 if (cli_conn)
Willy Tarreau3cc01d82019-07-17 11:27:38 +02001473 conn_get_dst(cli_conn);
Willy Tarreauff605db2013-12-20 11:09:51 +01001474 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001475
Willy Tarreauff605db2013-12-20 11:09:51 +01001476 assign_tproxy_address(s);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001477
1478 if (srv && (srv->flags & SRV_F_SOCKS4_PROXY)) {
1479 srv_conn->send_proxy_ofs = 1;
1480 srv_conn->flags |= CO_FL_SOCKS4;
1481 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001482 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001483 else if (!conn_xprt_ready(srv_conn)) {
1484 if (srv_conn->mux->reset)
1485 srv_conn->mux->reset(srv_conn);
1486 }
Olivier Houcharde8f5f5d2019-10-25 17:00:54 +02001487 else {
1488 /* Only consider we're doing reuse if the connection was
1489 * ready.
1490 */
1491 if (srv_conn->mux->ctl(srv_conn, MUX_STATUS, NULL) & MUX_STATUS_READY)
1492 s->flags |= SF_SRV_REUSED;
1493 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001494
William Lallemandb7ff6a32012-03-02 14:35:21 +01001495 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001496 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001497 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001498
Willy Tarreau14f8e862012-08-30 22:23:13 +02001499 /* disable lingering */
1500 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001501 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001502
Willy Tarreauf1573842018-12-14 11:35:36 +01001503 if (s->flags & SF_SRV_REUSED) {
Olivier Houchard237f7812019-03-08 18:49:07 +01001504 _HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001505 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001506 _HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001507 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +01001508 _HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001509 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001510 _HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001511 }
1512
Olivier Houchard201b9f42018-11-21 00:16:29 +01001513 err = si_connect(&s->si[1], srv_conn);
Willy Tarreau09e02032019-07-18 16:18:20 +02001514 if (err != SF_ERR_NONE)
1515 return err;
1516
Olivier Houchard5cd62172019-01-04 15:52:26 +01001517 /* We have to defer the mux initialization until after si_connect()
1518 * has been called, as we need the xprt to have been properly
1519 * initialized, or any attempt to recv during the mux init may
1520 * fail, and flag the connection as CO_FL_ERROR.
1521 */
1522 if (init_mux) {
Olivier Houchard74931142019-01-29 19:11:16 +01001523 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0) {
1524 conn_full_close(srv_conn);
Olivier Houchard5cd62172019-01-04 15:52:26 +01001525 return SF_ERR_INTERNAL;
Olivier Houchard74931142019-01-29 19:11:16 +01001526 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001527 /* If we're doing http-reuse always, and the connection
1528 * is an http2 connection, add it to the available list,
1529 * so that others can use it right away.
1530 */
1531 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1532 srv_conn->mux->avail_streams(srv_conn) > 0)
1533 LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
1534 }
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001535 /* The CO_FL_SEND_PROXY flag may have been set by the connect method,
1536 * if so, add our handshake pseudo-XPRT now.
1537 */
Olivier Houchard6c6dc582019-06-24 18:19:40 +02001538 if ((srv_conn->flags & CO_FL_HANDSHAKE_NOSSL)) {
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001539 if (xprt_add_hs(srv_conn) < 0) {
1540 conn_full_close(srv_conn);
1541 return SF_ERR_INTERNAL;
1542 }
1543 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001544
Willy Tarreaubaaee002006-06-26 02:48:02 +02001545
Willy Tarreau5db847a2019-05-09 14:13:35 +02001546#if USE_OPENSSL && (defined(OPENSSL_IS_BORINGSSL) || (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L))
Olivier Houchard4cd2af42019-05-06 15:18:27 +02001547
Olivier Houchard8694e5b2019-06-15 00:14:05 +02001548 if (!reuse && cli_conn && srv && srv_conn->mux &&
Olivier Houchard522eea72017-11-03 16:27:47 +01001549 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001550 /* Only attempt to use early data if either the client sent
1551 * early data, so that we know it can handle a 425, or if
1552 * we are allwoed to retry requests on early data failure, and
1553 * it's our first try
1554 */
1555 ((cli_conn->flags & CO_FL_EARLY_DATA) ||
1556 ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
1557 s->si[1].conn_retries == s->be->conn_retries)) &&
1558 !channel_is_empty(si_oc(&s->si[1])) &&
1559 srv_conn->flags & CO_FL_SSL_WAIT_HS)
Olivier Houchard522eea72017-11-03 16:27:47 +01001560 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001561#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001562
Willy Tarreau14f8e862012-08-30 22:23:13 +02001563 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001564 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001565
Willy Tarreau827aee92011-03-10 16:55:02 +01001566 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001567 int count;
1568
Willy Tarreaue7dff022015-04-03 01:14:29 +02001569 s->flags |= SF_CURR_SESS;
Olivier Houchard237f7812019-03-08 18:49:07 +01001570 count = _HA_ATOMIC_ADD(&srv->cur_sess, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +02001571 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001572 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001573 s->be->lbprm.server_take_conn(srv);
Willy Tarreau732eac42015-07-09 11:40:25 +02001574
1575#ifdef USE_OPENSSL
1576 if (srv->ssl_ctx.sni) {
1577 struct sample *smp;
Willy Tarreau732eac42015-07-09 11:40:25 +02001578
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001579 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1580 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau2e0565c2016-08-09 11:55:21 +02001581 if (smp_make_safe(smp)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001582 ssl_sock_set_servername(srv_conn,
1583 smp->data.u.str.area);
Willy Tarreau387ebf82015-08-04 19:24:13 +02001584 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreau732eac42015-07-09 11:40:25 +02001585 }
1586 }
1587#endif /* USE_OPENSSL */
1588
Willy Tarreaubaaee002006-06-26 02:48:02 +02001589 }
1590
Willy Tarreaue7dff022015-04-03 01:14:29 +02001591 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001592}
1593
1594
Willy Tarreaubaaee002006-06-26 02:48:02 +02001595/* This function performs the "redispatch" part of a connection attempt. It
1596 * will assign a server if required, queue the connection if required, and
1597 * handle errors that might arise at this level. It can change the server
1598 * state. It will return 1 if it encounters an error, switches the server
1599 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1600 * that the connection is ready to use.
1601 */
1602
Willy Tarreau87b09662015-04-03 00:22:06 +02001603int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001604{
Willy Tarreau827aee92011-03-10 16:55:02 +01001605 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001606 int conn_err;
1607
1608 /* We know that we don't have any connection pending, so we will
1609 * try to get a new one, and wait in this state if it's queued
1610 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001611 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001612 conn_err = assign_server_and_queue(s);
1613 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001614
Willy Tarreaubaaee002006-06-26 02:48:02 +02001615 switch (conn_err) {
1616 case SRV_STATUS_OK:
1617 break;
1618
Willy Tarreau7c669d72008-06-20 15:04:11 +02001619 case SRV_STATUS_FULL:
1620 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1621 * and we can redispatch to another server, or it is not and we return
1622 * 503. This only makes sense in DIRECT mode however, because normal LB
1623 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001624 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001625 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001626 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001627 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001628 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001629 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001630 sockaddr_free(&s->target_addr);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001631 goto redispatch;
1632 }
1633
Willy Tarreau350f4872014-11-28 14:42:25 +01001634 if (!s->si[1].err_type) {
1635 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001636 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001637
Olivier Houchard237f7812019-03-08 18:49:07 +01001638 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1639 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001640 return 1;
1641
Willy Tarreaubaaee002006-06-26 02:48:02 +02001642 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001643 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001644 if (!s->si[1].err_type) {
1645 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001646 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001647
Olivier Houchard237f7812019-03-08 18:49:07 +01001648 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001649 return 1;
1650
1651 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001652 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1653 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001654 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001655 return 1;
1656
Willy Tarreaubaaee002006-06-26 02:48:02 +02001657 case SRV_STATUS_INTERNAL:
1658 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001659 if (!s->si[1].err_type) {
1660 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001661 }
1662
Willy Tarreau827aee92011-03-10 16:55:02 +01001663 if (srv)
1664 srv_inc_sess_ctr(srv);
1665 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001666 srv_set_sess_last(srv);
1667 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001668 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1669 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001670
Willy Tarreau87b09662015-04-03 00:22:06 +02001671 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001672 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001673 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001674 return 1;
1675 }
1676 /* if we get here, it's because we got SRV_STATUS_OK, which also
1677 * means that the connection has not been queued.
1678 */
1679 return 0;
1680}
1681
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001682/* sends a log message when a backend goes down, and also sets last
1683 * change date.
1684 */
1685void set_backend_down(struct proxy *be)
1686{
1687 be->last_change = now.tv_sec;
Olivier Houchard237f7812019-03-08 18:49:07 +01001688 _HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001689
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001690 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001691 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001692 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
1693 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001694}
1695
Willy Tarreau87b09662015-04-03 00:22:06 +02001696/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001697 * tries to extract an RDP cookie from the request buffer, and look for the
1698 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02001699 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001700 * list. Nothing is performed if a server was already assigned.
1701 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001702int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001703{
1704 struct proxy *px = s->be;
1705 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02001706 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001707 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01001708 uint16_t port;
1709 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001710 char *p;
1711
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001712 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_TCP_ANA, s);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001713
Willy Tarreaue7dff022015-04-03 01:14:29 +02001714 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001715 goto no_cookie;
1716
Willy Tarreau37406352012-04-23 16:16:37 +02001717 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001718
Willy Tarreaucadd8c92013-07-22 18:09:52 +02001719 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001720 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001721 goto no_cookie;
1722
Willy Tarreau04276f32017-01-06 17:41:29 +01001723 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
1724 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
1725 * server's IP address in network order, and "port" is the integer corresponding to the
1726 * server's port in network order. Comments please Emeric.
1727 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001728 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001729 if (*p != '.')
1730 goto no_cookie;
1731 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01001732
1733 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001734 if (*p != '.')
1735 goto no_cookie;
1736
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001737 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001738 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02001739 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01001740 port == srv->svc_port &&
1741 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001742 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001743 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001744 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001745 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001746 break;
1747 }
1748 }
1749 srv = srv->next;
1750 }
1751
1752no_cookie:
1753 req->analysers &= ~an_bit;
1754 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01001755 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_TCP_ANA, s);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001756 return 1;
1757}
1758
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001759int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01001760 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001761 return px->down_time;
1762
1763 return now.tv_sec - px->last_change + px->down_time;
1764}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001765
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001766/*
1767 * This function returns a string containing the balancing
1768 * mode of the proxy in a format suitable for stats.
1769 */
1770
1771const char *backend_lb_algo_str(int algo) {
1772
1773 if (algo == BE_LB_ALGO_RR)
1774 return "roundrobin";
1775 else if (algo == BE_LB_ALGO_SRR)
1776 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01001777 else if (algo == BE_LB_ALGO_FAS)
1778 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001779 else if (algo == BE_LB_ALGO_LC)
1780 return "leastconn";
1781 else if (algo == BE_LB_ALGO_SH)
1782 return "source";
1783 else if (algo == BE_LB_ALGO_UH)
1784 return "uri";
1785 else if (algo == BE_LB_ALGO_PH)
1786 return "url_param";
1787 else if (algo == BE_LB_ALGO_HH)
1788 return "hdr";
1789 else if (algo == BE_LB_ALGO_RCH)
1790 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001791 else if (algo == BE_LB_ALGO_NONE)
1792 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001793 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001794 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001795}
1796
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001797/* This function parses a "balance" statement in a backend section describing
1798 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001799 * returns -1, it will write an error message into the <err> buffer which will
1800 * automatically be allocated and must be passed as NULL. The trailing '\n'
1801 * will not be written. The function must be called with <args> pointing to the
1802 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001803 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001804int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001805{
1806 if (!*(args[0])) {
1807 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01001808 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1809 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001810 return 0;
1811 }
1812
1813 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001814 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1815 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001816 }
Willy Tarreau9757a382009-10-03 12:56:50 +02001817 else if (!strcmp(args[0], "static-rr")) {
1818 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1819 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
1820 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01001821 else if (!strcmp(args[0], "first")) {
1822 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1823 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
1824 }
Willy Tarreau51406232008-03-10 22:04:20 +01001825 else if (!strcmp(args[0], "leastconn")) {
1826 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1827 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
1828 }
Willy Tarreau21c741a2019-01-14 18:14:27 +01001829 else if (!strncmp(args[0], "random", 6)) {
Willy Tarreau760e81d2018-05-03 07:20:40 +02001830 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1831 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
Willy Tarreau21c741a2019-01-14 18:14:27 +01001832 curproxy->lbprm.arg_opt1 = 2;
1833
1834 if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */
1835 const char *beg;
1836 char *end;
1837
1838 beg = args[0] + 7;
1839 curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0);
1840
1841 if (*end != ')') {
1842 if (!*end)
1843 memprintf(err, "random : missing closing parenthesis.");
1844 else
1845 memprintf(err, "random : unexpected character '%c' after argument.", *end);
1846 return -1;
1847 }
1848
1849 if (curproxy->lbprm.arg_opt1 < 1) {
1850 memprintf(err, "random : number of draws must be at least 1.");
1851 return -1;
1852 }
1853 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02001854 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001855 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001856 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1857 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001858 }
1859 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001860 int arg = 1;
1861
Willy Tarreau31682232007-11-29 15:38:04 +01001862 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1863 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Willy Tarreaua9a72492019-01-14 16:14:15 +01001864 curproxy->lbprm.arg_opt1 = 0; // "whole"
1865 curproxy->lbprm.arg_opt2 = 0; // "len"
1866 curproxy->lbprm.arg_opt3 = 0; // "depth"
Oskar Stolc8dc41842012-05-19 10:19:54 +01001867
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001868 while (*args[arg]) {
1869 if (!strcmp(args[arg], "len")) {
1870 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001871 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001872 return -1;
1873 }
Willy Tarreaua9a72492019-01-14 16:14:15 +01001874 curproxy->lbprm.arg_opt2 = atoi(args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001875 arg += 2;
1876 }
1877 else if (!strcmp(args[arg], "depth")) {
1878 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001879 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001880 return -1;
1881 }
1882 /* hint: we store the position of the ending '/' (depth+1) so
1883 * that we avoid a comparison while computing the hash.
1884 */
Willy Tarreaua9a72492019-01-14 16:14:15 +01001885 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001886 arg += 2;
1887 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01001888 else if (!strcmp(args[arg], "whole")) {
Willy Tarreaua9a72492019-01-14 16:14:15 +01001889 curproxy->lbprm.arg_opt1 = 1;
Oskar Stolc8dc41842012-05-19 10:19:54 +01001890 arg += 1;
1891 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001892 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01001893 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001894 return -1;
1895 }
1896 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001897 }
Willy Tarreau01732802007-11-01 22:48:15 +01001898 else if (!strcmp(args[0], "url_param")) {
1899 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001900 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01001901 return -1;
1902 }
Willy Tarreau31682232007-11-29 15:38:04 +01001903 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1904 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02001905
Willy Tarreau4c03d1c2019-01-14 15:23:54 +01001906 free(curproxy->lbprm.arg_str);
1907 curproxy->lbprm.arg_str = strdup(args[1]);
1908 curproxy->lbprm.arg_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001909 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001910 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001911 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001912 return -1;
1913 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001914 }
Benoitaffb4812009-03-25 13:02:10 +01001915 }
1916 else if (!strncmp(args[0], "hdr(", 4)) {
1917 const char *beg, *end;
1918
1919 beg = args[0] + 4;
1920 end = strchr(beg, ')');
1921
1922 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001923 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01001924 return -1;
1925 }
1926
1927 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1928 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
1929
Willy Tarreau484ff072019-01-14 15:28:53 +01001930 free(curproxy->lbprm.arg_str);
1931 curproxy->lbprm.arg_len = end - beg;
1932 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
Willy Tarreau9fed8582019-01-14 16:04:54 +01001933 curproxy->lbprm.arg_opt1 = 0;
Benoitaffb4812009-03-25 13:02:10 +01001934
1935 if (*args[1]) {
1936 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001937 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01001938 return -1;
1939 }
Willy Tarreau9fed8582019-01-14 16:04:54 +01001940 curproxy->lbprm.arg_opt1 = 1;
Benoitaffb4812009-03-25 13:02:10 +01001941 }
Emeric Brun736aa232009-06-30 17:56:00 +02001942 }
1943 else if (!strncmp(args[0], "rdp-cookie", 10)) {
1944 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1945 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
1946
1947 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
1948 const char *beg, *end;
1949
1950 beg = args[0] + 11;
1951 end = strchr(beg, ')');
1952
1953 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001954 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001955 return -1;
1956 }
1957
Willy Tarreau484ff072019-01-14 15:28:53 +01001958 free(curproxy->lbprm.arg_str);
1959 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
1960 curproxy->lbprm.arg_len = end - beg;
Emeric Brun736aa232009-06-30 17:56:00 +02001961 }
1962 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
Willy Tarreau484ff072019-01-14 15:28:53 +01001963 free(curproxy->lbprm.arg_str);
1964 curproxy->lbprm.arg_str = strdup("mstshash");
1965 curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str);
Emeric Brun736aa232009-06-30 17:56:00 +02001966 }
1967 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001968 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001969 return -1;
1970 }
Willy Tarreau01732802007-11-01 22:48:15 +01001971 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001972 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001973 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 +01001974 return -1;
1975 }
1976 return 0;
1977}
1978
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001979
1980/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01001981/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001982/************************************************************************/
1983
Willy Tarreau34db1082012-04-19 17:16:54 +02001984/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001985 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001986 * undefined behaviour.
1987 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001988static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001989smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001990{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001991 struct proxy *px;
1992
Willy Tarreau37406352012-04-23 16:16:37 +02001993 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001994 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02001995 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001996
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01001997 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001998
1999 return 1;
2000}
2001
Willy Tarreau37406352012-04-23 16:16:37 +02002002/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002003 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02002004 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2005 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002006 */
2007static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002008smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002009{
Willy Tarreau24e32d82012-04-23 23:55:44 +02002010 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002011
Willy Tarreau37406352012-04-23 16:16:37 +02002012 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002013 smp->data.type = SMP_T_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02002014 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
2015 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002016 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002017 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002018 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002019 return 1;
2020}
2021
Willy Tarreau34db1082012-04-19 17:16:54 +02002022/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002023 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002024 * undefined behaviour.
2025 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002026static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002027smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002028{
2029 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02002030
Willy Tarreau37406352012-04-23 16:16:37 +02002031 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002032 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002033 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002034
Willy Tarreau24e32d82012-04-23 23:55:44 +02002035 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02002036 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002037 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002038
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002039 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01002040 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002041 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002042 return 1;
2043 }
2044
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002045 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02002046 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002047 }
2048
2049 return 1;
2050}
2051
Willy Tarreaua5e37562011-12-16 17:06:15 +01002052/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002053static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002054smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002055{
Willy Tarreaube508f12016-03-10 11:47:01 +01002056 if (!smp->strm)
2057 return 0;
2058
Willy Tarreauf853c462012-04-23 18:53:56 +02002059 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002060 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002061 smp->data.u.sint = smp->strm->be->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002062 return 1;
2063}
2064
Marcin Deranekd2471c22016-12-12 14:08:05 +01002065/* set string to the name of the backend */
2066static int
2067smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2068{
2069 if (!smp->strm)
2070 return 0;
2071
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002072 smp->data.u.str.area = (char *)smp->strm->be->id;
2073 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002074 return 0;
2075
2076 smp->data.type = SMP_T_STR;
2077 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002078 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01002079
2080 return 1;
2081}
2082
Willy Tarreaua5e37562011-12-16 17:06:15 +01002083/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002084static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002085smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002086{
Willy Tarreaube508f12016-03-10 11:47:01 +01002087 if (!smp->strm)
2088 return 0;
2089
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002090 if (!objt_server(smp->strm->target))
Willy Tarreau17af4192011-02-23 14:27:06 +01002091 return 0;
2092
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002093 smp->data.type = SMP_T_SINT;
Willy Tarreau1e582e52018-09-20 11:29:28 +02002094 smp->data.u.sint = __objt_server(smp->strm->target)->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002095
2096 return 1;
2097}
2098
vkill1dfd1652019-10-30 16:58:14 +08002099/* set string to the name of the server */
2100static int
2101smp_fetch_srv_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2102{
2103 if (!smp->strm)
2104 return 0;
2105
2106 if (!objt_server(smp->strm->target))
2107 return 0;
2108
2109 smp->data.u.str.area = (char *)__objt_server(smp->strm->target)->id;
2110 if (!smp->data.u.str.area)
2111 return 0;
2112
2113 smp->data.type = SMP_T_STR;
2114 smp->data.u.str.data = strlen(smp->data.u.str.area);
2115
2116 return 1;
2117}
2118
Willy Tarreau34db1082012-04-19 17:16:54 +02002119/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002120 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002121 * undefined behaviour.
2122 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002123static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002124smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002125{
Willy Tarreau37406352012-04-23 16:16:37 +02002126 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002127 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002128 smp->data.u.sint = read_freq_ctr(&args->data.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002129 return 1;
2130}
2131
Willy Tarreau34db1082012-04-19 17:16:54 +02002132/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002133 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002134 * undefined behaviour.
2135 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002136static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002137smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002138{
Willy Tarreau37406352012-04-23 16:16:37 +02002139 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002140 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002141 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02002142 return 1;
2143}
2144
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002145/* set temp integer to the number of available connections across available
2146 * servers on the backend.
2147 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
2148 * undefined behaviour.
2149 */
2150static int
2151smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2152{
2153 struct server *iterator;
2154 struct proxy *px;
2155 unsigned int maxconn;
2156
2157 smp->flags = SMP_F_VOL_TEST;
2158 smp->data.type = SMP_T_SINT;
2159 smp->data.u.sint = 0;
2160
2161 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
2162 if (iterator->cur_state == SRV_ST_STOPPED)
2163 continue;
2164
2165 px = iterator->proxy;
2166 if (!srv_currently_usable(iterator) ||
2167 ((iterator->flags & SRV_F_BACKUP) &&
2168 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
2169 continue;
2170
2171 if (iterator->maxconn == 0) {
2172 /* one active server is unlimited, return -1 */
2173 smp->data.u.sint = -1;
2174 return 1;
2175 }
2176
2177 maxconn = srv_dynamic_maxconn(iterator);
2178 if (maxconn > iterator->cur_sess)
2179 smp->data.u.sint += maxconn - iterator->cur_sess;
2180 }
2181
2182 return 1;
2183}
2184
Willy Tarreau34db1082012-04-19 17:16:54 +02002185/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002186 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002187 * undefined behaviour.
2188 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002189static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002190smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002191{
Willy Tarreau37406352012-04-23 16:16:37 +02002192 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002193 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002194 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002195 return 1;
2196}
2197
Willy Tarreaua5e37562011-12-16 17:06:15 +01002198/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002199 * by the number of running servers and rounded up. If there is no running
2200 * server, we return twice the total, just as if we had half a running server.
2201 * This is more or less correct anyway, since we expect the last server to come
2202 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002203 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002204 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002205 */
2206static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002207smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002208{
2209 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002210 struct proxy *px;
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;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002214 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002215
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002216 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002217
2218 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002219 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002220 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002221 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002222
2223 return 1;
2224}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002225
Willy Tarreau34db1082012-04-19 17:16:54 +02002226/* set temp integer to the number of concurrent connections on the server in the backend.
2227 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2228 * undefined behaviour.
2229 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002230static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002231smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002232{
Willy Tarreauf853c462012-04-23 18:53:56 +02002233 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002234 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002235 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002236 return 1;
2237}
2238
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002239/* set temp integer to the number of available connections on the server in the backend.
2240 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2241 * undefined behaviour.
2242 */
2243static int
2244smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2245{
2246 unsigned int maxconn;
2247
2248 smp->flags = SMP_F_VOL_TEST;
2249 smp->data.type = SMP_T_SINT;
2250
2251 if (args->data.srv->maxconn == 0) {
2252 /* one active server is unlimited, return -1 */
2253 smp->data.u.sint = -1;
2254 return 1;
2255 }
2256
2257 maxconn = srv_dynamic_maxconn(args->data.srv);
2258 if (maxconn > args->data.srv->cur_sess)
2259 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2260 else
2261 smp->data.u.sint = 0;
2262
2263 return 1;
2264}
2265
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002266/* set temp integer to the number of connections pending in the server's queue.
2267 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2268 * undefined behaviour.
2269 */
2270static int
2271smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2272{
2273 smp->flags = SMP_F_VOL_TEST;
2274 smp->data.type = SMP_T_SINT;
2275 smp->data.u.sint = args->data.srv->nbpend;
2276 return 1;
2277}
2278
Tait Clarridge7896d522012-12-05 21:39:31 -05002279/* set temp integer to the number of enabled servers on the proxy.
2280 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2281 * undefined behaviour.
2282 */
2283static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002284smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002285{
2286 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002287 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002288 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002289 return 1;
2290}
2291
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002292static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2293{
2294
2295 struct proxy *px;
2296
2297 if (!smp_make_safe(smp))
2298 return 0;
2299
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002300 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002301 if (!px)
2302 return 0;
2303
2304 smp->data.type = SMP_T_SINT;
2305 smp->data.u.sint = be_usable_srv(px);
2306
2307 return 1;
2308}
2309
Nenad Merdanovic177adc92019-08-27 01:58:13 +02002310static int
2311sample_conv_srv_queue(const struct arg *args, struct sample *smp, void *private)
2312{
2313 struct proxy *px;
2314 struct server *srv;
2315 char *bksep;
2316
2317 if (!smp_make_safe(smp))
2318 return 0;
2319
2320 bksep = strchr(smp->data.u.str.area, '/');
2321
2322 if (bksep) {
2323 *bksep = '\0';
2324 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
2325 if (!px)
2326 return 0;
2327 smp->data.u.str.area = bksep + 1;
2328 } else {
2329 if (!(smp->px->cap & PR_CAP_BE))
2330 return 0;
2331 px = smp->px;
2332 }
2333
2334 srv = server_find_by_name(px, smp->data.u.str.area);
2335 if (!srv)
2336 return 0;
2337
2338 smp->data.type = SMP_T_SINT;
2339 smp->data.u.sint = srv->nbpend;
2340 return 1;
2341}
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002342
2343/* Note: must not be declared <const> as its list will be overwritten.
2344 * Please take care of keeping this list alphabetically sorted.
2345 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002346static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002347 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2348 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002349 { "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 +02002350 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002351 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002352 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2353 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2354 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2355 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2356 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002357 { "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 +02002358 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002359 { "srv_is_up", smp_fetch_srv_is_up, ARG1(1,SRV), NULL, SMP_T_BOOL, SMP_USE_INTRN, },
vkill1dfd1652019-10-30 16:58:14 +08002360 { "srv_name", smp_fetch_srv_name, 0, NULL, SMP_T_STR, SMP_USE_SERVR, },
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002361 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002362 { "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 +01002363 { /* END */ },
2364}};
2365
Willy Tarreau0108d902018-11-25 19:14:37 +01002366INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2367
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002368/* Note: must not be declared <const> as its list will be overwritten */
2369static struct sample_conv_kw_list sample_conv_kws = {ILH, {
Nenad Merdanovic177adc92019-08-27 01:58:13 +02002370 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2371 { "srv_queue", sample_conv_srv_queue, 0, NULL, SMP_T_STR, SMP_T_SINT },
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002372 { /* END */ },
2373}};
2374
Willy Tarreau0108d902018-11-25 19:14:37 +01002375INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002376
Willy Tarreau61612d42012-04-19 18:42:05 +02002377/* Note: must not be declared <const> as its list will be overwritten.
2378 * Please take care of keeping this list alphabetically sorted.
2379 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002380static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002381 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002382}};
2383
Willy Tarreau0108d902018-11-25 19:14:37 +01002384INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002385
Willy Tarreaubaaee002006-06-26 02:48:02 +02002386/*
2387 * Local variables:
2388 * c-indent-level: 8
2389 * c-basic-offset: 8
2390 * End:
2391 */