blob: 59324538d63e876bddf3cda81fc0e9850b93f94d [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Backend variables and functions.
3 *
Willy Tarreau1a7eca12013-01-07 22:38:03 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +02005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <syslog.h>
Willy Tarreauf19cf372006-11-14 15:40:51 +010018#include <string.h>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +020019#include <ctype.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040020#include <sys/types.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
Willy Tarreauc7e42382012-08-24 19:22:53 +020022#include <common/buffer.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020023#include <common/compat.h>
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020024#include <common/config.h>
Willy Tarreau7c669d72008-06-20 15:04:11 +020025#include <common/debug.h>
Bhaskar98634f02013-10-29 23:30:51 -040026#include <common/hash.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010027#include <common/initcall.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +020028#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020029#include <common/time.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010030#include <common/namespace.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020031
Willy Tarreaubaaee002006-06-26 02:48:02 +020032#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020033
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +010034#include <proto/acl.h>
Willy Tarreau34db1082012-04-19 17:16:54 +020035#include <proto/arg.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020036#include <proto/backend.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020037#include <proto/channel.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +020038#include <proto/frontend.h>
Willy Tarreau6b2e11b2009-10-01 07:52:15 +020039#include <proto/lb_chash.h>
Willy Tarreauf09c6602012-02-13 17:12:08 +010040#include <proto/lb_fas.h>
Willy Tarreauf89c1872009-10-01 11:19:37 +020041#include <proto/lb_fwlc.h>
42#include <proto/lb_fwrr.h>
43#include <proto/lb_map.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020044#include <proto/log.h>
Willy Tarreau53a47662017-08-28 10:53:00 +020045#include <proto/mux_pt.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010046#include <proto/obj_type.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010047#include <proto/payload.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020048#include <proto/protocol.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020049#include <proto/proto_http.h>
Willy Tarreaua8f55d52010-05-31 17:44:19 +020050#include <proto/proto_tcp.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020051#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020052#include <proto/queue.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010053#include <proto/sample.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +010054#include <proto/server.h>
Olivier Houchard00cf70f2018-11-30 17:24:55 +010055#include <proto/session.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020056#include <proto/stream.h>
Willy Tarreau9e000c62011-03-10 14:03:36 +010057#include <proto/stream_interface.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020058#include <proto/task.h>
59
Willy Tarreau732eac42015-07-09 11:40:25 +020060#ifdef USE_OPENSSL
61#include <proto/ssl_sock.h>
62#endif /* USE_OPENSSL */
63
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050064int be_lastsession(const struct proxy *be)
65{
66 if (be->be_counters.last_sess)
67 return now.tv_sec - be->be_counters.last_sess;
68
69 return -1;
70}
71
Bhaskar98634f02013-10-29 23:30:51 -040072/* helper function to invoke the correct hash method */
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070073static unsigned int gen_hash(const struct proxy* px, const char* key, unsigned long len)
Bhaskar98634f02013-10-29 23:30:51 -040074{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070075 unsigned int hash;
Bhaskar98634f02013-10-29 23:30:51 -040076
77 switch (px->lbprm.algo & BE_LB_HASH_FUNC) {
78 case BE_LB_HFCN_DJB2:
79 hash = hash_djb2(key, len);
80 break;
Willy Tarreaua0f42712013-11-14 14:30:35 +010081 case BE_LB_HFCN_WT6:
82 hash = hash_wt6(key, len);
83 break;
Willy Tarreau324f07f2015-01-20 19:44:50 +010084 case BE_LB_HFCN_CRC32:
85 hash = hash_crc32(key, len);
86 break;
Bhaskar98634f02013-10-29 23:30:51 -040087 case BE_LB_HFCN_SDBM:
88 /* this is the default hash function */
89 default:
90 hash = hash_sdbm(key, len);
91 break;
92 }
93
94 return hash;
95}
96
Willy Tarreaubaaee002006-06-26 02:48:02 +020097/*
98 * This function recounts the number of usable active and backup servers for
99 * proxy <p>. These numbers are returned into the p->srv_act and p->srv_bck.
Willy Tarreaub625a082007-11-26 01:15:43 +0100100 * This function also recomputes the total active and backup weights. However,
Willy Tarreauf4cca452008-03-08 21:42:54 +0100101 * it does not update tot_weight nor tot_used. Use update_backend_weight() for
Willy Tarreaub625a082007-11-26 01:15:43 +0100102 * this.
Emeric Brun52a91d32017-08-31 14:41:55 +0200103 * This functions is designed to be called before server's weight and state
104 * commit so it uses 'next' weight and states values.
Christopher Faulet5b517552017-06-09 14:17:53 +0200105 *
106 * threads: this is the caller responsibility to lock data. For now, this
107 * function is called from lb modules, so it should be ok. But if you need to
108 * call it from another place, be careful (and update this comment).
Willy Tarreaubaaee002006-06-26 02:48:02 +0200109 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200110void recount_servers(struct proxy *px)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200111{
112 struct server *srv;
113
Willy Tarreau20697042007-11-15 23:26:18 +0100114 px->srv_act = px->srv_bck = 0;
115 px->lbprm.tot_wact = px->lbprm.tot_wbck = 0;
Willy Tarreaub625a082007-11-26 01:15:43 +0100116 px->lbprm.fbck = NULL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200117 for (srv = px->srv; srv != NULL; srv = srv->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +0200118 if (!srv_willbe_usable(srv))
Willy Tarreaub625a082007-11-26 01:15:43 +0100119 continue;
120
Willy Tarreauc93cd162014-05-13 15:54:22 +0200121 if (srv->flags & SRV_F_BACKUP) {
Willy Tarreaub625a082007-11-26 01:15:43 +0100122 if (!px->srv_bck &&
Willy Tarreauf4cca452008-03-08 21:42:54 +0100123 !(px->options & PR_O_USE_ALL_BK))
Willy Tarreaub625a082007-11-26 01:15:43 +0100124 px->lbprm.fbck = srv;
125 px->srv_bck++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400126 srv->cumulative_weight = px->lbprm.tot_wbck;
Emeric Brun52a91d32017-08-31 14:41:55 +0200127 px->lbprm.tot_wbck += srv->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100128 } else {
129 px->srv_act++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400130 srv->cumulative_weight = px->lbprm.tot_wact;
Emeric Brun52a91d32017-08-31 14:41:55 +0200131 px->lbprm.tot_wact += srv->next_eweight;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200132 }
133 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100134}
Willy Tarreau20697042007-11-15 23:26:18 +0100135
Willy Tarreaub625a082007-11-26 01:15:43 +0100136/* This function simply updates the backend's tot_weight and tot_used values
137 * after servers weights have been updated. It is designed to be used after
138 * recount_servers() or equivalent.
Christopher Faulet5b517552017-06-09 14:17:53 +0200139 *
140 * threads: this is the caller responsibility to lock data. For now, this
141 * function is called from lb modules, so it should be ok. But if you need to
142 * call it from another place, be careful (and update this comment).
Willy Tarreaub625a082007-11-26 01:15:43 +0100143 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200144void update_backend_weight(struct proxy *px)
Willy Tarreaub625a082007-11-26 01:15:43 +0100145{
Willy Tarreau20697042007-11-15 23:26:18 +0100146 if (px->srv_act) {
147 px->lbprm.tot_weight = px->lbprm.tot_wact;
148 px->lbprm.tot_used = px->srv_act;
149 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100150 else if (px->lbprm.fbck) {
151 /* use only the first backup server */
Emeric Brun52a91d32017-08-31 14:41:55 +0200152 px->lbprm.tot_weight = px->lbprm.fbck->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100153 px->lbprm.tot_used = 1;
Willy Tarreau20697042007-11-15 23:26:18 +0100154 }
155 else {
Willy Tarreaub625a082007-11-26 01:15:43 +0100156 px->lbprm.tot_weight = px->lbprm.tot_wbck;
157 px->lbprm.tot_used = px->srv_bck;
Willy Tarreau20697042007-11-15 23:26:18 +0100158 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100159}
160
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200161/*
162 * This function tries to find a running server for the proxy <px> following
163 * the source hash method. Depending on the number of active/backup servers,
164 * it will either look for active servers, or for backup servers.
165 * If any server is found, it will be returned. If no valid server is found,
166 * NULL is returned.
167 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100168static struct server *get_server_sh(struct proxy *px, const char *addr, int len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200169{
170 unsigned int h, l;
171
172 if (px->lbprm.tot_weight == 0)
173 return NULL;
174
175 l = h = 0;
176
177 /* note: we won't hash if there's only one server left */
178 if (px->lbprm.tot_used == 1)
179 goto hash_done;
180
181 while ((l + sizeof (int)) <= len) {
182 h ^= ntohl(*(unsigned int *)(&addr[l]));
183 l += sizeof (int);
184 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500185 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100186 h = full_hash(h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200187 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100188 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100189 return chash_get_server_hash(px, h, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200190 else
191 return map_get_server_hash(px, h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200192}
193
194/*
195 * This function tries to find a running server for the proxy <px> following
196 * the URI hash method. In order to optimize cache hits, the hash computation
197 * ends at the question mark. Depending on the number of active/backup servers,
198 * it will either look for active servers, or for backup servers.
199 * If any server is found, it will be returned. If no valid server is found,
Willy Tarreaua9a72492019-01-14 16:14:15 +0100200 * NULL is returned. The lbprm.arg_opt{1,2,3} values correspond respectively to
201 * the "whole" optional argument (boolean), the "len" argument (numeric) and
202 * the "depth" argument (numeric).
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200203 *
204 * This code was contributed by Guillaume Dallaire, who also selected this hash
205 * algorithm out of a tens because it gave him the best results.
206 *
207 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100208static struct server *get_server_uh(struct proxy *px, char *uri, int uri_len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200209{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700210 unsigned int hash = 0;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200211 int c;
212 int slashes = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400213 const char *start, *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200214
215 if (px->lbprm.tot_weight == 0)
216 return NULL;
217
218 /* note: we won't hash if there's only one server left */
219 if (px->lbprm.tot_used == 1)
220 goto hash_done;
221
Willy Tarreaua9a72492019-01-14 16:14:15 +0100222 if (px->lbprm.arg_opt2) // "len"
223 uri_len = MIN(uri_len, px->lbprm.arg_opt2);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200224
Bhaskar98634f02013-10-29 23:30:51 -0400225 start = end = uri;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200226 while (uri_len--) {
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200227 c = *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200228 if (c == '/') {
229 slashes++;
Willy Tarreaua9a72492019-01-14 16:14:15 +0100230 if (slashes == px->lbprm.arg_opt3) /* depth+1 */
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200231 break;
232 }
Willy Tarreaua9a72492019-01-14 16:14:15 +0100233 else if (c == '?' && !px->lbprm.arg_opt1) // "whole"
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200234 break;
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200235 end++;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200236 }
Bhaskar98634f02013-10-29 23:30:51 -0400237
238 hash = gen_hash(px, start, (end - start));
239
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500240 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100241 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200242 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100243 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100244 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200245 else
246 return map_get_server_hash(px, hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200247}
248
Christopher Faulet5b517552017-06-09 14:17:53 +0200249/*
Willy Tarreau01732802007-11-01 22:48:15 +0100250 * This function tries to find a running server for the proxy <px> following
251 * the URL parameter hash method. It looks for a specific parameter in the
252 * URL and hashes it to compute the server ID. This is useful to optimize
253 * performance by avoiding bounces between servers in contexts where sessions
254 * are shared but cookies are not usable. If the parameter is not found, NULL
255 * is returned. If any server is found, it will be returned. If no valid server
256 * is found, NULL is returned.
Willy Tarreau01732802007-11-01 22:48:15 +0100257 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100258static 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 +0100259{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700260 unsigned int hash = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400261 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200262 const char *p;
263 const char *params;
Willy Tarreau01732802007-11-01 22:48:15 +0100264 int plen;
265
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200266 /* when tot_weight is 0 then so is srv_count */
Willy Tarreau20697042007-11-15 23:26:18 +0100267 if (px->lbprm.tot_weight == 0)
Willy Tarreau01732802007-11-01 22:48:15 +0100268 return NULL;
269
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200270 if ((p = memchr(uri, '?', uri_len)) == NULL)
271 return NULL;
272
Willy Tarreau01732802007-11-01 22:48:15 +0100273 p++;
274
275 uri_len -= (p - uri);
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100276 plen = px->lbprm.arg_len;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200277 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100278
279 while (uri_len > plen) {
280 /* Look for the parameter name followed by an equal symbol */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200281 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100282 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200283 /* OK, we have the parameter here at <params>, and
Willy Tarreau01732802007-11-01 22:48:15 +0100284 * the value after the equal sign, at <p>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200285 * skip the equal symbol
Willy Tarreau01732802007-11-01 22:48:15 +0100286 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200287 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400288 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200289 uri_len -= plen + 1;
290
Bhaskar98634f02013-10-29 23:30:51 -0400291 while (uri_len && *end != '&') {
Willy Tarreau01732802007-11-01 22:48:15 +0100292 uri_len--;
Bhaskar98634f02013-10-29 23:30:51 -0400293 end++;
Willy Tarreau01732802007-11-01 22:48:15 +0100294 }
Bhaskar98634f02013-10-29 23:30:51 -0400295 hash = gen_hash(px, start, (end - start));
296
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500297 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100298 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400299
Willy Tarreau6c30be52019-01-14 17:07:39 +0100300 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100301 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200302 else
303 return map_get_server_hash(px, hash);
Willy Tarreau01732802007-11-01 22:48:15 +0100304 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200305 }
306 /* skip to next parameter */
307 p = memchr(params, '&', uri_len);
308 if (!p)
309 return NULL;
310 p++;
311 uri_len -= (p - params);
312 params = p;
313 }
314 return NULL;
315}
316
317/*
318 * this does the same as the previous server_ph, but check the body contents
319 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100320static struct server *get_server_ph_post(struct stream *s, const struct server *avoid)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200321{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700322 unsigned int hash = 0;
Willy Tarreaueee5b512015-04-03 23:46:31 +0200323 struct http_txn *txn = s->txn;
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100324 struct channel *req = &s->req;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200325 struct http_msg *msg = &txn->req;
326 struct proxy *px = s->be;
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100327 unsigned int plen = px->lbprm.arg_len;
Willy Tarreau2d8e4852014-04-17 20:08:17 +0200328 unsigned long len = http_body_bytes(msg);
Willy Tarreau188e2302018-06-15 11:11:53 +0200329 const char *params = c_ptr(req, -http_data_rewind(msg));
Willy Tarreau157dd632009-12-06 19:18:09 +0100330 const char *p = params;
Bhaskar98634f02013-10-29 23:30:51 -0400331 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200332
Willy Tarreau157dd632009-12-06 19:18:09 +0100333 if (len == 0)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200334 return NULL;
335
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200336 if (len > b_wrap(&req->buf) - p)
337 len = b_wrap(&req->buf) - p;
Willy Tarreauf69d4ff2015-05-02 00:05:47 +0200338
Willy Tarreau157dd632009-12-06 19:18:09 +0100339 if (px->lbprm.tot_weight == 0)
340 return NULL;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200341
342 while (len > plen) {
343 /* Look for the parameter name followed by an equal symbol */
344 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100345 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200346 /* OK, we have the parameter here at <params>, and
347 * the value after the equal sign, at <p>
348 * skip the equal symbol
349 */
350 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400351 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200352 len -= plen + 1;
353
Bhaskar98634f02013-10-29 23:30:51 -0400354 while (len && *end != '&') {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200355 if (unlikely(!HTTP_IS_TOKEN(*p))) {
Willy Tarreau157dd632009-12-06 19:18:09 +0100356 /* if in a POST, body must be URI encoded or it's not a URI.
Bhaskar98634f02013-10-29 23:30:51 -0400357 * Do not interpret any possible binary data as a parameter.
Willy Tarreau157dd632009-12-06 19:18:09 +0100358 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200359 if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */
360 break;
361 return NULL; /* oh, no; this is not uri-encoded.
362 * This body does not contain parameters.
363 */
364 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200365 len--;
Bhaskar98634f02013-10-29 23:30:51 -0400366 end++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200367 /* should we break if vlen exceeds limit? */
368 }
Bhaskar98634f02013-10-29 23:30:51 -0400369 hash = gen_hash(px, start, (end - start));
370
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500371 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100372 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400373
Willy Tarreau6c30be52019-01-14 17:07:39 +0100374 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100375 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200376 else
377 return map_get_server_hash(px, hash);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200378 }
379 }
Willy Tarreau01732802007-11-01 22:48:15 +0100380 /* skip to next parameter */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200381 p = memchr(params, '&', len);
Willy Tarreau01732802007-11-01 22:48:15 +0100382 if (!p)
383 return NULL;
384 p++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200385 len -= (p - params);
386 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100387 }
388 return NULL;
389}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200390
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200391
Willy Tarreaubaaee002006-06-26 02:48:02 +0200392/*
Benoitaffb4812009-03-25 13:02:10 +0100393 * This function tries to find a running server for the proxy <px> following
394 * the Header parameter hash method. It looks for a specific parameter in the
395 * URL and hashes it to compute the server ID. This is useful to optimize
396 * performance by avoiding bounces between servers in contexts where sessions
397 * are shared but cookies are not usable. If the parameter is not found, NULL
398 * is returned. If any server is found, it will be returned. If no valid server
Willy Tarreau9fed8582019-01-14 16:04:54 +0100399 * is found, NULL is returned. When lbprm.arg_opt1 is set, the hash will only
400 * apply to the middle part of a domain name ("use_domain_only" option).
Benoitaffb4812009-03-25 13:02:10 +0100401 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100402static struct server *get_server_hh(struct stream *s, const struct server *avoid)
Benoitaffb4812009-03-25 13:02:10 +0100403{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700404 unsigned int hash = 0;
Willy Tarreaueee5b512015-04-03 23:46:31 +0200405 struct http_txn *txn = s->txn;
Benoitaffb4812009-03-25 13:02:10 +0100406 struct proxy *px = s->be;
Willy Tarreau484ff072019-01-14 15:28:53 +0100407 unsigned int plen = px->lbprm.arg_len;
Benoitaffb4812009-03-25 13:02:10 +0100408 unsigned long len;
409 struct hdr_ctx ctx;
410 const char *p;
Bhaskar98634f02013-10-29 23:30:51 -0400411 const char *start, *end;
Benoitaffb4812009-03-25 13:02:10 +0100412
413 /* tot_weight appears to mean srv_count */
414 if (px->lbprm.tot_weight == 0)
415 return NULL;
416
Benoitaffb4812009-03-25 13:02:10 +0100417 ctx.idx = 0;
418
419 /* if the message is chunked, we skip the chunk size, but use the value as len */
Willy Tarreau484ff072019-01-14 15:28:53 +0100420 http_find_header2(px->lbprm.arg_str, plen, c_ptr(&s->req, -http_hdr_rewind(&txn->req)), &txn->hdr_idx, &ctx);
Benoitaffb4812009-03-25 13:02:10 +0100421
422 /* if the header is not found or empty, let's fallback to round robin */
423 if (!ctx.idx || !ctx.vlen)
424 return NULL;
425
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200426 /* note: we won't hash if there's only one server left */
427 if (px->lbprm.tot_used == 1)
428 goto hash_done;
429
Willy Tarreau484ff072019-01-14 15:28:53 +0100430 /* Found the param_name in the headers.
Benoitaffb4812009-03-25 13:02:10 +0100431 * we will compute the hash based on this value ctx.val.
432 */
433 len = ctx.vlen;
434 p = (char *)ctx.line + ctx.val;
Willy Tarreau9fed8582019-01-14 16:04:54 +0100435 if (!px->lbprm.arg_opt1) {
Bhaskar98634f02013-10-29 23:30:51 -0400436 hash = gen_hash(px, p, len);
Benoitaffb4812009-03-25 13:02:10 +0100437 } else {
438 int dohash = 0;
Cyril Bontéf607d812015-01-04 15:17:36 +0100439 p += len;
Benoitaffb4812009-03-25 13:02:10 +0100440 /* special computation, use only main domain name, not tld/host
441 * going back from the end of string, start hashing at first
442 * dot stop at next.
443 * This is designed to work with the 'Host' header, and requires
444 * a special option to activate this.
445 */
Cyril Bontéf607d812015-01-04 15:17:36 +0100446 end = p;
Benoitaffb4812009-03-25 13:02:10 +0100447 while (len) {
Cyril Bontéf607d812015-01-04 15:17:36 +0100448 if (dohash) {
449 /* Rewind the pointer until the previous char
450 * is a dot, this will allow to set the start
451 * position of the domain. */
452 if (*(p - 1) == '.')
Benoitaffb4812009-03-25 13:02:10 +0100453 break;
Benoitaffb4812009-03-25 13:02:10 +0100454 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100455 else if (*p == '.') {
456 /* The pointer is rewinded to the dot before the
457 * tld, we memorize the end of the domain and
458 * can enter the domain processing. */
459 end = p;
460 dohash = 1;
461 }
Benoitaffb4812009-03-25 13:02:10 +0100462 p--;
Cyril Bontéf607d812015-01-04 15:17:36 +0100463 len--;
Benoitaffb4812009-03-25 13:02:10 +0100464 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100465 start = p;
Bhaskar98634f02013-10-29 23:30:51 -0400466 hash = gen_hash(px, start, (end - start));
Benoitaffb4812009-03-25 13:02:10 +0100467 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500468 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100469 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200470 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100471 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100472 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200473 else
474 return map_get_server_hash(px, hash);
Benoitaffb4812009-03-25 13:02:10 +0100475}
476
Willy Tarreau34db1082012-04-19 17:16:54 +0200477/* RDP Cookie HASH. */
Willy Tarreau59884a62019-01-02 14:48:31 +0100478static struct server *get_server_rch(struct stream *s, const struct server *avoid)
Emeric Brun736aa232009-06-30 17:56:00 +0200479{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700480 unsigned int hash = 0;
Emeric Brun736aa232009-06-30 17:56:00 +0200481 struct proxy *px = s->be;
482 unsigned long len;
Emeric Brun736aa232009-06-30 17:56:00 +0200483 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +0200484 struct sample smp;
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200485 int rewind;
Emeric Brun736aa232009-06-30 17:56:00 +0200486
487 /* tot_weight appears to mean srv_count */
488 if (px->lbprm.tot_weight == 0)
489 return NULL;
490
Willy Tarreau37406352012-04-23 16:16:37 +0200491 memset(&smp, 0, sizeof(smp));
Emeric Brun736aa232009-06-30 17:56:00 +0200492
Willy Tarreau6a445eb2018-06-19 07:04:45 +0200493 rewind = co_data(&s->req);
494 c_rew(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200495
Willy Tarreau484ff072019-01-14 15:28:53 +0100496 ret = fetch_rdp_cookie_name(s, &smp, px->lbprm.arg_str, px->lbprm.arg_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200497 len = smp.data.u.str.data;
Willy Tarreau664092c2011-12-16 19:11:42 +0100498
Willy Tarreaubcbd3932018-06-06 07:13:22 +0200499 c_adv(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200500
Willy Tarreau37406352012-04-23 16:16:37 +0200501 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0)
Emeric Brun736aa232009-06-30 17:56:00 +0200502 return NULL;
503
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200504 /* note: we won't hash if there's only one server left */
505 if (px->lbprm.tot_used == 1)
506 goto hash_done;
507
Willy Tarreau484ff072019-01-14 15:28:53 +0100508 /* Found the param_name in the headers.
Emeric Brun736aa232009-06-30 17:56:00 +0200509 * we will compute the hash based on this value ctx.val.
510 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200511 hash = gen_hash(px, smp.data.u.str.area, len);
Bhaskar98634f02013-10-29 23:30:51 -0400512
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500513 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100514 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200515 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100516 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100517 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200518 else
519 return map_get_server_hash(px, hash);
Emeric Brun736aa232009-06-30 17:56:00 +0200520}
Christopher Faulet5b517552017-06-09 14:17:53 +0200521
Willy Tarreau760e81d2018-05-03 07:20:40 +0200522/* random value */
Willy Tarreau59884a62019-01-02 14:48:31 +0100523static struct server *get_server_rnd(struct stream *s, const struct server *avoid)
Willy Tarreau760e81d2018-05-03 07:20:40 +0200524{
525 unsigned int hash = 0;
526 struct proxy *px = s->be;
Willy Tarreau21c741a2019-01-14 18:14:27 +0100527 struct server *prev, *curr;
528 int draws = px->lbprm.arg_opt1; // number of draws
Willy Tarreau760e81d2018-05-03 07:20:40 +0200529
530 /* tot_weight appears to mean srv_count */
531 if (px->lbprm.tot_weight == 0)
532 return NULL;
533
Willy Tarreau21c741a2019-01-14 18:14:27 +0100534 curr = NULL;
535 do {
536 prev = curr;
537 /* ensure all 32 bits are covered as long as RAND_MAX >= 65535 */
538 hash = ((uint64_t)random() * ((uint64_t)RAND_MAX + 1)) ^ random();
539 curr = chash_get_server_hash(px, hash, avoid);
540 if (!curr)
541 break;
542
543 /* compare the new server to the previous best choice and pick
544 * the one with the least currently served requests.
545 */
546 if (prev && prev != curr &&
547 curr->served * prev->cur_eweight > prev->served * curr->cur_eweight)
548 curr = prev;
549 } while (--draws > 0);
550
551 return curr;
Willy Tarreau760e81d2018-05-03 07:20:40 +0200552}
553
Benoitaffb4812009-03-25 13:02:10 +0100554/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200555 * This function applies the load-balancing algorithm to the stream, as
556 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200557 * 'assigned'.
558 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200559 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200560 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100561 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200562 * The function tries to keep the original connection slot if it reconnects to
563 * the same server, otherwise it releases it and tries to offer it.
564 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200565 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200566 *
567 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100568 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200569 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
570 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200571 * SRV_STATUS_INTERNAL for other unrecoverable errors.
572 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200573 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100574 * it does not need to be called anymore. This means that target_srv(&s->target)
575 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200576 *
577 */
578
Willy Tarreau87b09662015-04-03 00:22:06 +0200579int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200580{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100581 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200582 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100583 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200584 int err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100585
Simon Horman8effd3d2011-08-13 08:03:52 +0900586 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200587
Willy Tarreau7c669d72008-06-20 15:04:11 +0200588 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200589 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200590 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100591
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100592 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200593 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200594
Willy Tarreau7c669d72008-06-20 15:04:11 +0200595 /* We have to release any connection slot before applying any LB algo,
596 * otherwise we may erroneously end up with no available slot.
597 */
598 if (conn_slot)
599 sess_change_server(s, NULL);
600
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100601 /* We will now try to find the good server and store it into <objt_server(s->target)>.
602 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200603 * as well as if no server is available (check error code).
604 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100605
Willy Tarreau827aee92011-03-10 16:55:02 +0100606 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100607 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100608
Olivier Houchardba4fff52018-12-01 14:40:40 +0100609 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
610 ((s->txn && s->txn->flags & TX_PREFER_LAST) ||
611 (s->be->options & PR_O_PREF_LAST))) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100612 struct sess_srv_list *srv_list;
613 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
614 struct server *tmpsrv = objt_server(srv_list->target);
Olivier Houchardba4fff52018-12-01 14:40:40 +0100615
616 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100617 ((s->txn && s->txn->flags & TX_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100618 (!s->be->max_ka_queue ||
619 server_has_room(tmpsrv) || (
620 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
621 srv_currently_usable(tmpsrv)) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100622 list_for_each_entry(conn, &srv_list->conn_list, session_list) {
Olivier Houchardba4fff52018-12-01 14:40:40 +0100623 if (conn->flags & CO_FL_CONNECTED) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100624
Olivier Houchardba4fff52018-12-01 14:40:40 +0100625 srv = tmpsrv;
626 s->target = &srv->obj_type;
627 goto out_ok;
628 }
629 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100630 }
631 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100632 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100633 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200634
Willy Tarreau7c669d72008-06-20 15:04:11 +0200635 /* we must check if we have at least one server available */
636 if (!s->be->lbprm.tot_weight) {
637 err = SRV_STATUS_NOSRV;
638 goto out;
639 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200640
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200641 /* First check whether we need to fetch some data or simply call
642 * the LB lookup function. Only the hashing functions will need
643 * some input data in fact, and will support multiple algorithms.
644 */
645 switch (s->be->lbprm.algo & BE_LB_LKUP) {
646 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100647 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200648 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200649
Willy Tarreauf09c6602012-02-13 17:12:08 +0100650 case BE_LB_LKUP_FSTREE:
651 srv = fas_get_next_server(s->be, prev_srv);
652 break;
653
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200654 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100655 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200656 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200657
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200658 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200659 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200660 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200661 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
Willy Tarreau59884a62019-01-02 14:48:31 +0100662 srv = get_server_rnd(s, prev_srv);
Willy Tarreau6c30be52019-01-14 17:07:39 +0100663 else if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100664 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200665 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100666 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200667 break;
668 }
669 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200670 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200671 err = SRV_STATUS_INTERNAL;
672 goto out;
673 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200674
675 switch (s->be->lbprm.algo & BE_LB_PARM) {
676 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200677 conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200678 if (conn && conn->addr.from.ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200679 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200680 (void *)&((struct sockaddr_in *)&conn->addr.from)->sin_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100681 4, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200682 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200683 else if (conn && conn->addr.from.ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200684 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200685 (void *)&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100686 16, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200687 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200688 else {
689 /* unknown IP family */
690 err = SRV_STATUS_INTERNAL;
691 goto out;
692 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200693 break;
694
695 case BE_LB_HASH_URI:
696 /* URI hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200697 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100698 break;
Willy Tarreau827aee92011-03-10 16:55:02 +0100699 srv = get_server_uh(s->be,
Willy Tarreau188e2302018-06-15 11:11:53 +0200700 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
Willy Tarreau59884a62019-01-02 14:48:31 +0100701 s->txn->req.sl.rq.u_l, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200702 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200703
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200704 case BE_LB_HASH_PRM:
705 /* URL Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200706 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100707 break;
Willy Tarreau61a21a32011-03-01 20:35:49 +0100708
Willy Tarreau827aee92011-03-10 16:55:02 +0100709 srv = get_server_ph(s->be,
Willy Tarreau188e2302018-06-15 11:11:53 +0200710 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
Willy Tarreau59884a62019-01-02 14:48:31 +0100711 s->txn->req.sl.rq.u_l, prev_srv);
Willy Tarreau61a21a32011-03-01 20:35:49 +0100712
Willy Tarreaueee5b512015-04-03 23:46:31 +0200713 if (!srv && s->txn->meth == HTTP_METH_POST)
Willy Tarreau59884a62019-01-02 14:48:31 +0100714 srv = get_server_ph_post(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200715 break;
Benoitaffb4812009-03-25 13:02:10 +0100716
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200717 case BE_LB_HASH_HDR:
718 /* Header Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200719 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100720 break;
Willy Tarreau59884a62019-01-02 14:48:31 +0100721 srv = get_server_hh(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200722 break;
723
724 case BE_LB_HASH_RDP:
725 /* RDP Cookie hashing */
Willy Tarreau59884a62019-01-02 14:48:31 +0100726 srv = get_server_rch(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200727 break;
728
729 default:
730 /* unknown balancing algorithm */
731 err = SRV_STATUS_INTERNAL;
732 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100733 }
Emeric Brun736aa232009-06-30 17:56:00 +0200734
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200735 /* If the hashing parameter was not found, let's fall
736 * back to round robin on the map.
737 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100738 if (!srv) {
Willy Tarreau6c30be52019-01-14 17:07:39 +0100739 if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100740 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200741 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100742 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200743 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200744
745 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200746 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200747
Willy Tarreau7c669d72008-06-20 15:04:11 +0200748 default:
749 /* unknown balancing algorithm */
750 err = SRV_STATUS_INTERNAL;
751 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200752 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200753
Willy Tarreau827aee92011-03-10 16:55:02 +0100754 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200755 err = SRV_STATUS_FULL;
756 goto out;
757 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100758 else if (srv != prev_srv) {
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200759 HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +0200760 HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100761 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100762 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200763 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200764 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100765 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200766 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100767 else if ((s->be->options & PR_O_HTTP_PROXY)) {
768 conn = cs_conn(objt_cs(s->si[1].end));
769
770 if (conn && is_addr(&conn->addr.to)) {
771 /* in proxy mode, we need a valid destination address */
772 s->target = &s->be->obj_type;
773 } else {
774 err = SRV_STATUS_NOSRV;
775 goto out;
776 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100777 }
778 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200779 err = SRV_STATUS_NOSRV;
780 goto out;
781 }
782
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100783out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200784 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200785 err = SRV_STATUS_OK;
786 out:
787
788 /* Either we take back our connection slot, or we offer it to someone
789 * else if we don't need it anymore.
790 */
791 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100792 if (conn_slot == srv) {
793 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200794 } else {
795 if (may_dequeue_tasks(conn_slot, s->be))
796 process_srv_queue(conn_slot);
797 }
798 }
799
800 out_err:
801 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200802}
803
Willy Tarreaubaaee002006-06-26 02:48:02 +0200804/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200805 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200806 * The address is taken from the currently assigned server, or from the
807 * dispatch or transparent address.
808 *
809 * It may return :
810 * SRV_STATUS_OK if everything is OK.
811 * SRV_STATUS_INTERNAL for other unrecoverable errors.
812 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200813 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200814 * not cleared, so it's to the caller to clear it if required.
815 *
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200816 * The caller is responsible for having already assigned a connection
817 * to si->end.
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200818 *
Willy Tarreaubaaee002006-06-26 02:48:02 +0200819 */
Olivier Houchard201b9f42018-11-21 00:16:29 +0100820int assign_server_address(struct stream *s, struct connection *srv_conn)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200821{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200822 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200823
Christopher Faulet56803b12017-11-24 16:06:18 +0100824 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200825
Willy Tarreaue7dff022015-04-03 01:14:29 +0200826 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200827 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200828 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200829 return SRV_STATUS_INTERNAL;
830
Willy Tarreau1e582e52018-09-20 11:29:28 +0200831 srv_conn->addr.to = __objt_server(s->target)->addr;
832 set_host_port(&srv_conn->addr.to, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200833
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200834 if (!is_addr(&srv_conn->addr.to) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200835 /* if the server has no address, we use the same address
836 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200837 * locally on multiple addresses at once. Nothing is done
838 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200839 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200840 conn_get_to_addr(cli_conn);
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200841
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200842 if (cli_conn->addr.to.ss_family == AF_INET) {
843 ((struct sockaddr_in *)&srv_conn->addr.to)->sin_addr = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
844 } else if (cli_conn->addr.to.ss_family == AF_INET6) {
845 ((struct sockaddr_in6 *)&srv_conn->addr.to)->sin6_addr = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Emeric Brunec810d12010-10-22 16:36:33 +0200846 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200847 }
848
Willy Tarreaubaaee002006-06-26 02:48:02 +0200849 /* if this server remaps proxied ports, we'll use
850 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +0200851 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +0100852 int base_port;
853
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200854 conn_get_to_addr(cli_conn);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100855
856 /* First, retrieve the port from the incoming connection */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200857 base_port = get_host_port(&cli_conn->addr.to);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100858
859 /* Second, assign the outgoing connection's port */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200860 base_port += get_host_port(&srv_conn->addr.to);
861 set_host_port(&srv_conn->addr.to, base_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200862 }
863 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200864 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200865 /* connect to the defined dispatch addr */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200866 srv_conn->addr.to = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200867 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200868 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200869 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200870 conn_get_to_addr(cli_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200871
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200872 if (cli_conn->addr.to.ss_family == AF_INET || cli_conn->addr.to.ss_family == AF_INET6)
873 srv_conn->addr.to = cli_conn->addr.to;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200874 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100875 else if (s->be->options & PR_O_HTTP_PROXY) {
876 /* If HTTP PROXY option is set, then server is already assigned
877 * during incoming client request parsing. */
878 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +0100879 else {
880 /* no server and no LB algorithm ! */
881 return SRV_STATUS_INTERNAL;
882 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200883
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100884 /* Copy network namespace from client connection */
Thierry FOURNIERfe1ebcd2014-12-19 13:37:11 +0100885 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100886
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;
Christopher Faulet29f77e82017-06-08 14:04:45 +0200940 HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200941 HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200942 } else {
Christopher Faulet29f77e82017-06-08 14:04:45 +0200943 HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200944 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 Tarreau9cd7d6c2012-12-08 23:13:33 +01001038 switch (src->opts & CO_SRC_TPROXY_MASK) {
1039 case CO_SRC_TPROXY_ADDR:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001040 srv_conn->addr.from = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001041 break;
1042 case CO_SRC_TPROXY_CLI:
1043 case CO_SRC_TPROXY_CIP:
1044 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001045 cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001046 if (cli_conn)
1047 srv_conn->addr.from = cli_conn->addr.from;
1048 else
1049 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001050 break;
1051 case CO_SRC_TPROXY_DYN:
Willy Tarreaueee5b512015-04-03 23:46:31 +02001052 if (src->bind_hdr_occ && s->txn) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001053 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001054 size_t vlen;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001055 int rewind;
Willy Tarreau294c4732011-12-16 21:35:50 +01001056
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001057 /* bind to the IP in a header */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001058 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_family = AF_INET;
1059 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_port = 0;
1060 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr = 0;
Willy Tarreau294c4732011-12-16 21:35:50 +01001061
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001062 c_rew(&s->req, rewind = http_hdr_rewind(&s->txn->req));
Willy Tarreaueee5b512015-04-03 23:46:31 +02001063 if (http_get_hdr(&s->txn->req, src->bind_hdr_name, src->bind_hdr_len,
1064 &s->txn->hdr_idx, src->bind_hdr_occ, NULL, &vptr, &vlen)) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001065 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001066 htonl(inetaddr_host_lim(vptr, vptr + vlen));
Willy Tarreaubce70882009-09-07 11:51:47 +02001067 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001068 c_adv(&s->req, rewind);
Willy Tarreaub1d67742010-03-29 19:36:59 +02001069 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001070 break;
1071 default:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001072 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreaub1d67742010-03-29 19:36:59 +02001073 }
1074#endif
1075}
1076
Lukas Tribusda95fd92018-11-25 13:21:27 +01001077#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001078/*
1079 * Pick the right mux once the connection is established, we should now have
Willy Tarreau94031d32018-12-19 14:36:29 +01001080 * an alpn if available, so we are now able to choose. In this specific case
1081 * the connection's context is &si[i].end.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001082 */
1083static int conn_complete_server(struct connection *conn)
1084{
1085 struct conn_stream *cs = NULL;
Willy Tarreau94031d32018-12-19 14:36:29 +01001086 struct stream *s = container_of(conn->ctx, struct stream, si[1].end);
Olivier Houchardbf024f02018-11-29 17:08:53 +01001087 struct server *srv;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001088
Olivier Houchard70d9b2f2018-11-29 16:57:32 +01001089 task_wakeup(s->task, TASK_WOKEN_IO);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001090 conn_clear_xprt_done_cb(conn);
1091 /* Verify if the connection just established. */
1092 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED))))
1093 conn->flags |= CO_FL_CONNECTED;
1094
Olivier Houchard201b9f42018-11-21 00:16:29 +01001095 if (conn->flags & CO_FL_ERROR)
1096 goto fail;
Olivier Houchardd76bd2d2018-11-29 16:58:49 +01001097 si_detach_endpoint(&s->si[1]);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001098 cs = si_alloc_cs(&s->si[1], conn);
1099 if (!cs)
1100 goto fail;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001101 if (conn_install_mux_be(conn, cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001102 goto fail;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001103 srv = objt_server(s->target);
Olivier Houchard7aec9ed2018-12-14 19:31:51 +01001104 if (srv && ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
Olivier Houchardbf024f02018-11-29 17:08:53 +01001105 conn->mux->avail_streams(conn) > 0)
1106 LIST_ADD(&srv->idle_conns[tid], &conn->list);
1107
Olivier Houchard201b9f42018-11-21 00:16:29 +01001108 return 0;
1109
1110fail:
1111 if (cs)
1112 cs_free(cs);
1113 /* kill the connection now */
1114 conn_stop_tracking(conn);
1115 conn_full_close(conn);
1116 conn_free(conn);
Olivier Houchard4f417512018-12-27 18:59:46 +01001117 /* Let process_stream know it went wrong */
1118 s->si[1].flags |= SI_FL_ERR;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001119 return -1;
1120}
Olivier Houchardc6e0bb42018-11-23 14:24:10 +01001121#endif
Olivier Houchard201b9f42018-11-21 00:16:29 +01001122
Willy Tarreaub1d67742010-03-29 19:36:59 +02001123
Willy Tarreaubaaee002006-06-26 02:48:02 +02001124/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001125 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001126 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001127 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001128 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001129 * - SF_ERR_NONE if everything's OK
1130 * - SF_ERR_SRVTO if there are no more servers
1131 * - SF_ERR_SRVCL if the connection was refused by the server
1132 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1133 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1134 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001135 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001136 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001137 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001138 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001139int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001140{
Olivier Houchard522eea72017-11-03 16:27:47 +01001141 struct connection *cli_conn = NULL;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001142 struct connection *srv_conn = NULL;
1143 struct connection *old_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001144 struct conn_stream *srv_cs = NULL;
Willy Tarreau827aee92011-03-10 16:55:02 +01001145 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001146 int reuse = 0;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001147 int reuse_orphan = 0;
Olivier Houchard5cd62172019-01-04 15:52:26 +01001148 int init_mux = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001149 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001150
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001151
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001152 /* Some, such as http_proxy and the LUA, create their connection and
1153 * conn_stream manually, so if we already have a conn_stream, try
1154 * to use it.
1155 */
1156 srv_cs = objt_cs(s->si[1].end);
1157 if (srv_cs) {
1158 old_conn = srv_conn = cs_conn(srv_cs);
Olivier Houchardbb3dac32018-12-24 13:32:13 +01001159 if (old_conn && (!old_conn->target || old_conn->target == s->target)) {
Olivier Houchardac1ce6f2018-12-08 19:08:48 +01001160 old_conn->flags &= ~(CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH);
Olivier Houchardab8b0752018-12-13 15:37:25 +01001161 srv_cs->flags &= ~(CS_FL_ERROR | CS_FL_EOS | CS_FL_REOS);
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001162 reuse = 1;
Olivier Houchardac1ce6f2018-12-08 19:08:48 +01001163 }
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001164 } else {
Olivier Houchard351411f2018-12-27 17:20:54 +01001165 struct sess_srv_list *srv_list;
1166 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
1167 if (srv_list->target == s->target) {
1168 list_for_each_entry(srv_conn, &srv_list->conn_list,
Olivier Houchard2442f682018-12-01 17:03:38 +01001169 session_list) {
1170 if (conn_xprt_ready(srv_conn) &&
1171 srv_conn->mux && (srv_conn->mux->avail_streams(srv_conn) > 0)) {
1172 reuse = 1;
1173 break;
1174 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001175 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001176 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001177 }
1178 }
Olivier Houchardc3fa6382018-12-27 15:29:53 +01001179 if (reuse == 0) {
1180 srv_conn = NULL;
Olivier Houchard351411f2018-12-27 17:20:54 +01001181 if (!LIST_ISEMPTY(&s->sess->srv_list)) {
1182 srv_list = LIST_ELEM(s->sess->srv_list.n,
1183 struct sess_srv_list *, srv_list);
1184 if (!LIST_ISEMPTY(&srv_list->conn_list))
1185 srv_conn = LIST_ELEM(srv_list->conn_list.n,
1186 struct connection *, session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001187 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001188
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001189 }
1190 }
1191 old_conn = srv_conn;
1192
Willy Tarreau7b004922015-08-04 19:34:21 +02001193 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001194
Willy Tarreau8dff9982015-08-04 20:45:52 +02001195 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001196 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001197
Willy Tarreau449d74a2015-08-05 17:16:33 +02001198 /* Below we pick connections from the safe or idle lists based
1199 * on the strategy, the fact that this is a first or second
1200 * (retryable) request, with the indicated priority (1 or 2) :
1201 *
1202 * SAFE AGGR ALWS
1203 *
1204 * +-----+-----+ +-----+-----+ +-----+-----+
1205 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1206 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1207 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1208 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1209 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1210 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1211 */
Christopher Faulet40a007c2017-07-03 15:41:01 +02001212 if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001213 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1214 s->txn && (s->txn->flags & TX_NOT_FIRST))) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001215 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001216 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001217 else if (srv->safe_conns && !LIST_ISEMPTY(&srv->safe_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001218 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1219 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR)) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001220 srv_conn = LIST_ELEM(srv->safe_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001221 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001222 else if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001223 (s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001224 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001225 } else if (srv->idle_orphan_conns && !LIST_ISEMPTY(&srv->idle_orphan_conns[tid]) &&
1226 (((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) ||
1227 (((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
1228 s->txn && (s->txn->flags & TX_NOT_FIRST)))) {
1229 srv_conn = LIST_ELEM(srv->idle_orphan_conns[tid].n,
1230 struct connection *, list);
1231 reuse_orphan = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001232 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001233
Willy Tarreau449d74a2015-08-05 17:16:33 +02001234 /* If we've picked a connection from the pool, we now have to
1235 * detach it. We may have to get rid of the previous idle
1236 * connection we had, so for this we try to swap it with the
1237 * other owner's. That way it may remain alive for others to
1238 * pick.
1239 */
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001240 if (srv_conn)
Willy Tarreau8dff9982015-08-04 20:45:52 +02001241 reuse = 1;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001242 }
1243
Willy Tarreau34601a82013-12-15 16:33:46 +01001244 if (reuse) {
1245 /* Disable connection reuse if a dynamic source is used.
1246 * As long as we don't share connections between servers,
1247 * we don't need to disable connection reuse on no-idempotent
1248 * requests nor when PROXY protocol is used.
1249 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001250 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1251 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1252 reuse = 0;
1253 }
1254 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1255 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1256 reuse = 0;
1257 }
1258 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001259 /* If we're really reusing the connection, remove it from the orphan
1260 * list and add it back to the idle list.
1261 */
1262 if (reuse && reuse_orphan) {
1263 LIST_DEL(&srv_conn->list);
Olivier Houchard006e3102018-12-10 18:30:32 +01001264 srv_conn->idle_time = 0;
1265 srv->curr_idle_conns--;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001266 LIST_ADDQ(&srv->idle_conns[tid], &srv_conn->list);
1267 if (LIST_ISEMPTY(&srv->idle_orphan_conns[tid]))
1268 task_unlink_wq(srv->idle_task[tid]);
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001269 } else if (reuse) {
1270 if (srv_conn->flags & CO_FL_SESS_IDLE) {
1271 struct session *sess = srv_conn->owner;
1272
1273 srv_conn->flags &= ~CO_FL_SESS_IDLE;
1274 sess->idle_conns--;
1275 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001276 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001277
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001278 /* We're about to use another connection, let the mux know we're
1279 * done with this one
1280 */
Olivier Houchardc685d702018-12-28 16:20:25 +01001281 if (old_conn != srv_conn && old_conn && reuse && !reuse_orphan) {
1282 struct session *sess = srv_conn->owner;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001283
Olivier Houchardc685d702018-12-28 16:20:25 +01001284 if (sess) {
1285 if (old_conn && !(old_conn->flags & CO_FL_PRIVATE) &&
1286 old_conn->mux != NULL) {
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001287 if (old_conn->flags & CO_FL_SESS_IDLE)
1288 s->sess->idle_conns--;
Olivier Houchardc685d702018-12-28 16:20:25 +01001289 session_unown_conn(s->sess, old_conn);
1290 old_conn->owner = sess;
1291 if (!session_add_conn(sess, old_conn, s->target)) {
1292 old_conn->owner = NULL;
1293 old_conn->mux->destroy(old_conn);
1294 } else
1295 session_check_idle_conn(sess, old_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001296 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001297 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001298 }
1299
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001300 if (reuse) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001301 /* We already created a cs earlier when using http_proxy, so
1302 * only create a new one if we don't have one already.
1303 */
1304 if (!srv_cs) {
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001305 int avail = srv_conn->mux->avail_streams(srv_conn);
1306
1307 if (avail <= 1) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001308 /* No more streams available, remove it from the list */
1309 LIST_DEL(&srv_conn->list);
1310 LIST_INIT(&srv_conn->list);
1311 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001312
1313 if (avail >= 1) {
1314 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
1315 if (srv_cs)
1316 si_attach_cs(&s->si[1], srv_cs);
1317 else
1318 srv_conn = NULL;
1319 }
Olivier Houchard134a2042018-12-28 14:45:47 +01001320 else
1321 srv_conn = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001322 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001323 /* otherwise srv_conn is left intact */
1324 }
1325 else
1326 srv_conn = NULL;
1327
1328 /* no reuse or failed to reuse the connection above, pick a new one */
1329 if (!srv_conn) {
1330 srv_conn = conn_new();
1331 srv_cs = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001332 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001333
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001334 if (srv_conn && old_conn != srv_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001335 if (srv_conn->owner)
1336 session_unown_conn(srv_conn->owner, srv_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001337 srv_conn->owner = s->sess;
Olivier Houchard351411f2018-12-27 17:20:54 +01001338 if (!session_add_conn(s->sess, srv_conn, s->target)) {
1339 /* If we failed to attach the connection, detach the
1340 * conn_stream, possibly destroying the connection */
1341 cs_destroy(srv_cs);
1342 srv_conn->owner = NULL;
1343 if (!srv_add_to_idle_list(objt_server(srv_conn->target), srv_conn))
1344 /* The server doesn't want it, let's kill the connection right away */
1345 srv_conn->mux->destroy(srv_conn);
1346 srv_conn = NULL;
1347
1348 }
Willy Tarreau323a2d92015-08-04 19:00:17 +02001349 }
Willy Tarreauc12b5e62015-08-04 19:45:36 +02001350
Olivier Houchard201b9f42018-11-21 00:16:29 +01001351 if (!srv_conn)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001352 return SF_ERR_RESOURCE;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001353
Willy Tarreaue7dff022015-04-03 01:14:29 +02001354 if (!(s->flags & SF_ADDR_SET)) {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001355 err = assign_server_address(s, srv_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001356 if (err != SRV_STATUS_OK)
Willy Tarreaue7dff022015-04-03 01:14:29 +02001357 return SF_ERR_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001358 }
1359
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001360 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreau87b09662015-04-03 00:22:06 +02001361 /* the target was only on the stream, assign it to the SI now */
Willy Tarreauff605db2013-12-20 11:09:51 +01001362 srv_conn->target = s->target;
Willy Tarreaud88edf22009-06-14 15:48:17 +02001363
Willy Tarreauff605db2013-12-20 11:09:51 +01001364 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001365 if (srv)
Willy Tarreau7b004922015-08-04 19:34:21 +02001366 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001367 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1368 /* proxies exclusively run on raw_sock right now */
Willy Tarreaua261e9b2016-12-22 20:44:00 +01001369 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), xprt_get(XPRT_RAW));
Olivier Houchard12950162018-11-23 14:32:08 +01001370 if (!(srv_conn->ctrl))
Willy Tarreaue7dff022015-04-03 01:14:29 +02001371 return SF_ERR_INTERNAL;
Willy Tarreauff605db2013-12-20 11:09:51 +01001372 }
1373 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001374 return SF_ERR_INTERNAL; /* how did we get there ? */
Willy Tarreaud02394b2012-05-11 18:32:18 +02001375
Lukas Tribusda95fd92018-11-25 13:21:27 +01001376#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001377 if (!srv ||
1378 ((!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
1379 srv->mux_proto))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001380#endif
1381 {
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001382 srv_cs = objt_cs(s->si[1].end);
1383 if (!srv_cs || srv_cs->conn != srv_conn)
1384 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001385 if (!srv_cs) {
1386 conn_free(srv_conn);
1387 return SF_ERR_RESOURCE;
1388 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001389 init_mux = 1;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001390 }
Lukas Tribusda95fd92018-11-25 13:21:27 +01001391#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001392 else {
Willy Tarreau94031d32018-12-19 14:36:29 +01001393 srv_conn->ctx = &s->si[1].end;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001394 /* Store the connection into the stream interface,
1395 * while we still don't have a mux, so that if the
1396 * stream is destroyed before the connection is
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001397 * established, we have a chance to destroy it even
1398 * if it is no longer referenced in the session.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001399 */
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001400 s->si[1].end = &srv_conn->obj_type;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001401 conn_set_xprt_done_cb(srv_conn, conn_complete_server);
1402 }
1403
1404#endif
1405
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001406
Willy Tarreauff605db2013-12-20 11:09:51 +01001407 /* process the case where the server requires the PROXY protocol to be sent */
1408 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001409 cli_conn = objt_conn(strm_orig(s));
1410
Willy Tarreau7b004922015-08-04 19:34:21 +02001411 if (srv && srv->pp_opts) {
Willy Tarreau387ebf82015-08-04 19:24:13 +02001412 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreauff605db2013-12-20 11:09:51 +01001413 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001414 if (cli_conn)
1415 conn_get_to_addr(cli_conn);
1416 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001417
Willy Tarreauff605db2013-12-20 11:09:51 +01001418 assign_tproxy_address(s);
1419 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001420 else if (!conn_xprt_ready(srv_conn)) {
1421 if (srv_conn->mux->reset)
1422 srv_conn->mux->reset(srv_conn);
1423 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001424 else
Willy Tarreaue7dff022015-04-03 01:14:29 +02001425 s->flags |= SF_SRV_REUSED;
Willy Tarreaub1d67742010-03-29 19:36:59 +02001426
William Lallemandb7ff6a32012-03-02 14:35:21 +01001427 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001428 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001429 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001430
Willy Tarreau14f8e862012-08-30 22:23:13 +02001431 /* disable lingering */
1432 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001433 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001434
Willy Tarreauf1573842018-12-14 11:35:36 +01001435 if (s->flags & SF_SRV_REUSED) {
1436 HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001437 if (srv)
1438 HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001439 } else {
1440 HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001441 if (srv)
1442 HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001443 }
1444
Olivier Houchard201b9f42018-11-21 00:16:29 +01001445 err = si_connect(&s->si[1], srv_conn);
Olivier Houchard5cd62172019-01-04 15:52:26 +01001446 /* We have to defer the mux initialization until after si_connect()
1447 * has been called, as we need the xprt to have been properly
1448 * initialized, or any attempt to recv during the mux init may
1449 * fail, and flag the connection as CO_FL_ERROR.
1450 */
1451 if (init_mux) {
1452 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0)
1453 return SF_ERR_INTERNAL;
1454 /* If we're doing http-reuse always, and the connection
1455 * is an http2 connection, add it to the available list,
1456 * so that others can use it right away.
1457 */
1458 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1459 srv_conn->mux->avail_streams(srv_conn) > 0)
1460 LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
1461 }
1462
Willy Tarreaubaaee002006-06-26 02:48:02 +02001463
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001464#ifdef USE_OPENSSL
Olivier Houchard522eea72017-11-03 16:27:47 +01001465 if (!reuse && cli_conn && srv &&
1466 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
1467 (cli_conn->flags & CO_FL_EARLY_DATA) &&
1468 !channel_is_empty(si_oc(&s->si[1])) &&
1469 srv_conn->flags & CO_FL_SSL_WAIT_HS) {
1470 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
1471 srv_conn->flags |= CO_FL_EARLY_SSL_HS;
1472 }
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001473#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001474
Willy Tarreaue7dff022015-04-03 01:14:29 +02001475 if (err != SF_ERR_NONE)
Willy Tarreau9650f372009-08-16 14:02:45 +02001476 return err;
Willy Tarreau788e2842008-08-26 13:25:39 +02001477
Willy Tarreau14f8e862012-08-30 22:23:13 +02001478 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001479 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001480
Willy Tarreau827aee92011-03-10 16:55:02 +01001481 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001482 int count;
1483
Willy Tarreaue7dff022015-04-03 01:14:29 +02001484 s->flags |= SF_CURR_SESS;
Christopher Faulet29f77e82017-06-08 14:04:45 +02001485 count = HA_ATOMIC_ADD(&srv->cur_sess, 1);
1486 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001487 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001488 s->be->lbprm.server_take_conn(srv);
Willy Tarreau732eac42015-07-09 11:40:25 +02001489
1490#ifdef USE_OPENSSL
1491 if (srv->ssl_ctx.sni) {
1492 struct sample *smp;
1493 int rewind;
1494
1495 /* Tricky case : we have already scheduled the pending
1496 * HTTP request or TCP data for leaving. So in HTTP we
1497 * rewind exactly the headers, otherwise we rewind the
1498 * output data.
1499 */
Willy Tarreau6a445eb2018-06-19 07:04:45 +02001500 rewind = s->txn ? http_hdr_rewind(&s->txn->req) : co_data(&s->req);
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001501 c_rew(&s->req, rewind);
Willy Tarreau732eac42015-07-09 11:40:25 +02001502
1503 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL, srv->ssl_ctx.sni, SMP_T_STR);
1504
1505 /* restore the pointers */
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001506 c_adv(&s->req, rewind);
Willy Tarreau732eac42015-07-09 11:40:25 +02001507
Willy Tarreau2e0565c2016-08-09 11:55:21 +02001508 if (smp_make_safe(smp)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001509 ssl_sock_set_servername(srv_conn,
1510 smp->data.u.str.area);
Willy Tarreau387ebf82015-08-04 19:24:13 +02001511 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreau732eac42015-07-09 11:40:25 +02001512 }
1513 }
1514#endif /* USE_OPENSSL */
1515
Willy Tarreaubaaee002006-06-26 02:48:02 +02001516 }
1517
Willy Tarreaue7dff022015-04-03 01:14:29 +02001518 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001519}
1520
1521
Willy Tarreaubaaee002006-06-26 02:48:02 +02001522/* This function performs the "redispatch" part of a connection attempt. It
1523 * will assign a server if required, queue the connection if required, and
1524 * handle errors that might arise at this level. It can change the server
1525 * state. It will return 1 if it encounters an error, switches the server
1526 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1527 * that the connection is ready to use.
1528 */
1529
Willy Tarreau87b09662015-04-03 00:22:06 +02001530int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001531{
Willy Tarreau827aee92011-03-10 16:55:02 +01001532 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001533 int conn_err;
1534
1535 /* We know that we don't have any connection pending, so we will
1536 * try to get a new one, and wait in this state if it's queued
1537 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001538 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001539 conn_err = assign_server_and_queue(s);
1540 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001541
Willy Tarreaubaaee002006-06-26 02:48:02 +02001542 switch (conn_err) {
1543 case SRV_STATUS_OK:
1544 break;
1545
Willy Tarreau7c669d72008-06-20 15:04:11 +02001546 case SRV_STATUS_FULL:
1547 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1548 * and we can redispatch to another server, or it is not and we return
1549 * 503. This only makes sense in DIRECT mode however, because normal LB
1550 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001551 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001552 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001553 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001554 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001555 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001556 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001557 goto redispatch;
1558 }
1559
Willy Tarreau350f4872014-11-28 14:42:25 +01001560 if (!s->si[1].err_type) {
1561 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001562 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001563
Christopher Faulet29f77e82017-06-08 14:04:45 +02001564 HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001565 HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001566 return 1;
1567
Willy Tarreaubaaee002006-06-26 02:48:02 +02001568 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001569 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001570 if (!s->si[1].err_type) {
1571 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001572 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001573
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001574 HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001575 return 1;
1576
1577 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001578 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1579 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001580 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001581 return 1;
1582
Willy Tarreaubaaee002006-06-26 02:48:02 +02001583 case SRV_STATUS_INTERNAL:
1584 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001585 if (!s->si[1].err_type) {
1586 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001587 }
1588
Willy Tarreau827aee92011-03-10 16:55:02 +01001589 if (srv)
1590 srv_inc_sess_ctr(srv);
1591 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001592 srv_set_sess_last(srv);
1593 if (srv)
Christopher Faulet29f77e82017-06-08 14:04:45 +02001594 HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001595 HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001596
Willy Tarreau87b09662015-04-03 00:22:06 +02001597 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001598 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001599 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001600 return 1;
1601 }
1602 /* if we get here, it's because we got SRV_STATUS_OK, which also
1603 * means that the connection has not been queued.
1604 */
1605 return 0;
1606}
1607
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001608/* sends a log message when a backend goes down, and also sets last
1609 * change date.
1610 */
1611void set_backend_down(struct proxy *be)
1612{
1613 be->last_change = now.tv_sec;
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001614 HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001615
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001616 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001617 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001618 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
1619 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001620}
1621
Willy Tarreau87b09662015-04-03 00:22:06 +02001622/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001623 * tries to extract an RDP cookie from the request buffer, and look for the
1624 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02001625 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001626 * list. Nothing is performed if a server was already assigned.
1627 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001628int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001629{
1630 struct proxy *px = s->be;
1631 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02001632 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001633 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01001634 uint16_t port;
1635 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001636 char *p;
1637
Christopher Faulet45073512018-07-20 10:16:29 +02001638 DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001639 now_ms, __FUNCTION__,
1640 s,
1641 req,
1642 req->rex, req->wex,
1643 req->flags,
Christopher Faulet45073512018-07-20 10:16:29 +02001644 ci_data(req),
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001645 req->analysers);
1646
Willy Tarreaue7dff022015-04-03 01:14:29 +02001647 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001648 goto no_cookie;
1649
Willy Tarreau37406352012-04-23 16:16:37 +02001650 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001651
Willy Tarreaucadd8c92013-07-22 18:09:52 +02001652 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001653 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001654 goto no_cookie;
1655
Willy Tarreau04276f32017-01-06 17:41:29 +01001656 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
1657 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
1658 * server's IP address in network order, and "port" is the integer corresponding to the
1659 * server's port in network order. Comments please Emeric.
1660 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001661 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001662 if (*p != '.')
1663 goto no_cookie;
1664 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01001665
1666 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001667 if (*p != '.')
1668 goto no_cookie;
1669
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001670 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001671 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02001672 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01001673 port == srv->svc_port &&
1674 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001675 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001676 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001677 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001678 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001679 break;
1680 }
1681 }
1682 srv = srv->next;
1683 }
1684
1685no_cookie:
1686 req->analysers &= ~an_bit;
1687 req->analyse_exp = TICK_ETERNITY;
1688 return 1;
1689}
1690
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001691int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01001692 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001693 return px->down_time;
1694
1695 return now.tv_sec - px->last_change + px->down_time;
1696}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001697
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001698/*
1699 * This function returns a string containing the balancing
1700 * mode of the proxy in a format suitable for stats.
1701 */
1702
1703const char *backend_lb_algo_str(int algo) {
1704
1705 if (algo == BE_LB_ALGO_RR)
1706 return "roundrobin";
1707 else if (algo == BE_LB_ALGO_SRR)
1708 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01001709 else if (algo == BE_LB_ALGO_FAS)
1710 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001711 else if (algo == BE_LB_ALGO_LC)
1712 return "leastconn";
1713 else if (algo == BE_LB_ALGO_SH)
1714 return "source";
1715 else if (algo == BE_LB_ALGO_UH)
1716 return "uri";
1717 else if (algo == BE_LB_ALGO_PH)
1718 return "url_param";
1719 else if (algo == BE_LB_ALGO_HH)
1720 return "hdr";
1721 else if (algo == BE_LB_ALGO_RCH)
1722 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001723 else if (algo == BE_LB_ALGO_NONE)
1724 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001725 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01001726 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001727}
1728
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001729/* This function parses a "balance" statement in a backend section describing
1730 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001731 * returns -1, it will write an error message into the <err> buffer which will
1732 * automatically be allocated and must be passed as NULL. The trailing '\n'
1733 * will not be written. The function must be called with <args> pointing to the
1734 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001735 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001736int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001737{
1738 if (!*(args[0])) {
1739 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01001740 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1741 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001742 return 0;
1743 }
1744
1745 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001746 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1747 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001748 }
Willy Tarreau9757a382009-10-03 12:56:50 +02001749 else if (!strcmp(args[0], "static-rr")) {
1750 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1751 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
1752 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01001753 else if (!strcmp(args[0], "first")) {
1754 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1755 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
1756 }
Willy Tarreau51406232008-03-10 22:04:20 +01001757 else if (!strcmp(args[0], "leastconn")) {
1758 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1759 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
1760 }
Willy Tarreau21c741a2019-01-14 18:14:27 +01001761 else if (!strncmp(args[0], "random", 6)) {
Willy Tarreau760e81d2018-05-03 07:20:40 +02001762 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1763 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
Willy Tarreau21c741a2019-01-14 18:14:27 +01001764 curproxy->lbprm.arg_opt1 = 2;
1765
1766 if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */
1767 const char *beg;
1768 char *end;
1769
1770 beg = args[0] + 7;
1771 curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0);
1772
1773 if (*end != ')') {
1774 if (!*end)
1775 memprintf(err, "random : missing closing parenthesis.");
1776 else
1777 memprintf(err, "random : unexpected character '%c' after argument.", *end);
1778 return -1;
1779 }
1780
1781 if (curproxy->lbprm.arg_opt1 < 1) {
1782 memprintf(err, "random : number of draws must be at least 1.");
1783 return -1;
1784 }
1785 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02001786 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001787 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01001788 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1789 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001790 }
1791 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001792 int arg = 1;
1793
Willy Tarreau31682232007-11-29 15:38:04 +01001794 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1795 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Willy Tarreaua9a72492019-01-14 16:14:15 +01001796 curproxy->lbprm.arg_opt1 = 0; // "whole"
1797 curproxy->lbprm.arg_opt2 = 0; // "len"
1798 curproxy->lbprm.arg_opt3 = 0; // "depth"
Oskar Stolc8dc41842012-05-19 10:19:54 +01001799
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001800 while (*args[arg]) {
1801 if (!strcmp(args[arg], "len")) {
1802 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001803 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001804 return -1;
1805 }
Willy Tarreaua9a72492019-01-14 16:14:15 +01001806 curproxy->lbprm.arg_opt2 = atoi(args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001807 arg += 2;
1808 }
1809 else if (!strcmp(args[arg], "depth")) {
1810 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001811 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001812 return -1;
1813 }
1814 /* hint: we store the position of the ending '/' (depth+1) so
1815 * that we avoid a comparison while computing the hash.
1816 */
Willy Tarreaua9a72492019-01-14 16:14:15 +01001817 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001818 arg += 2;
1819 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01001820 else if (!strcmp(args[arg], "whole")) {
Willy Tarreaua9a72492019-01-14 16:14:15 +01001821 curproxy->lbprm.arg_opt1 = 1;
Oskar Stolc8dc41842012-05-19 10:19:54 +01001822 arg += 1;
1823 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001824 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01001825 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001826 return -1;
1827 }
1828 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001829 }
Willy Tarreau01732802007-11-01 22:48:15 +01001830 else if (!strcmp(args[0], "url_param")) {
1831 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001832 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01001833 return -1;
1834 }
Willy Tarreau31682232007-11-29 15:38:04 +01001835 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1836 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02001837
Willy Tarreau4c03d1c2019-01-14 15:23:54 +01001838 free(curproxy->lbprm.arg_str);
1839 curproxy->lbprm.arg_str = strdup(args[1]);
1840 curproxy->lbprm.arg_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02001841 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001842 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001843 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001844 return -1;
1845 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02001846 }
Benoitaffb4812009-03-25 13:02:10 +01001847 }
1848 else if (!strncmp(args[0], "hdr(", 4)) {
1849 const char *beg, *end;
1850
1851 beg = args[0] + 4;
1852 end = strchr(beg, ')');
1853
1854 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001855 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01001856 return -1;
1857 }
1858
1859 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1860 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
1861
Willy Tarreau484ff072019-01-14 15:28:53 +01001862 free(curproxy->lbprm.arg_str);
1863 curproxy->lbprm.arg_len = end - beg;
1864 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
Willy Tarreau9fed8582019-01-14 16:04:54 +01001865 curproxy->lbprm.arg_opt1 = 0;
Benoitaffb4812009-03-25 13:02:10 +01001866
1867 if (*args[1]) {
1868 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001869 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01001870 return -1;
1871 }
Willy Tarreau9fed8582019-01-14 16:04:54 +01001872 curproxy->lbprm.arg_opt1 = 1;
Benoitaffb4812009-03-25 13:02:10 +01001873 }
Emeric Brun736aa232009-06-30 17:56:00 +02001874 }
1875 else if (!strncmp(args[0], "rdp-cookie", 10)) {
1876 curproxy->lbprm.algo &= ~BE_LB_ALGO;
1877 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
1878
1879 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
1880 const char *beg, *end;
1881
1882 beg = args[0] + 11;
1883 end = strchr(beg, ')');
1884
1885 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001886 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001887 return -1;
1888 }
1889
Willy Tarreau484ff072019-01-14 15:28:53 +01001890 free(curproxy->lbprm.arg_str);
1891 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
1892 curproxy->lbprm.arg_len = end - beg;
Emeric Brun736aa232009-06-30 17:56:00 +02001893 }
1894 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
Willy Tarreau484ff072019-01-14 15:28:53 +01001895 free(curproxy->lbprm.arg_str);
1896 curproxy->lbprm.arg_str = strdup("mstshash");
1897 curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str);
Emeric Brun736aa232009-06-30 17:56:00 +02001898 }
1899 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001900 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02001901 return -1;
1902 }
Willy Tarreau01732802007-11-01 22:48:15 +01001903 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01001904 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02001905 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 +01001906 return -1;
1907 }
1908 return 0;
1909}
1910
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001911
1912/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01001913/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001914/************************************************************************/
1915
Willy Tarreau34db1082012-04-19 17:16:54 +02001916/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001917 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001918 * undefined behaviour.
1919 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001920static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001921smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001922{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001923 struct proxy *px;
1924
Willy Tarreau37406352012-04-23 16:16:37 +02001925 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001926 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02001927 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001928
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01001929 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01001930
1931 return 1;
1932}
1933
Willy Tarreau37406352012-04-23 16:16:37 +02001934/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001935 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02001936 * Accepts exactly 1 argument. Argument is a server, other types will lead to
1937 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001938 */
1939static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001940smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001941{
Willy Tarreau24e32d82012-04-23 23:55:44 +02001942 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001943
Willy Tarreau37406352012-04-23 16:16:37 +02001944 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001945 smp->data.type = SMP_T_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02001946 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
1947 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001948 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001949 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001950 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02001951 return 1;
1952}
1953
Willy Tarreau34db1082012-04-19 17:16:54 +02001954/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001955 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02001956 * undefined behaviour.
1957 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001958static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001959smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001960{
1961 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02001962
Willy Tarreau37406352012-04-23 16:16:37 +02001963 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001964 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001965 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001966
Willy Tarreau24e32d82012-04-23 23:55:44 +02001967 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001968 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001969 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02001970
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001971 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01001972 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001973 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001974 return 1;
1975 }
1976
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001977 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02001978 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08001979 }
1980
1981 return 1;
1982}
1983
Willy Tarreaua5e37562011-12-16 17:06:15 +01001984/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01001985static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001986smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02001987{
Willy Tarreaube508f12016-03-10 11:47:01 +01001988 if (!smp->strm)
1989 return 0;
1990
Willy Tarreauf853c462012-04-23 18:53:56 +02001991 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001992 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001993 smp->data.u.sint = smp->strm->be->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01001994 return 1;
1995}
1996
Marcin Deranekd2471c22016-12-12 14:08:05 +01001997/* set string to the name of the backend */
1998static int
1999smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2000{
2001 if (!smp->strm)
2002 return 0;
2003
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002004 smp->data.u.str.area = (char *)smp->strm->be->id;
2005 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002006 return 0;
2007
2008 smp->data.type = SMP_T_STR;
2009 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002010 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01002011
2012 return 1;
2013}
2014
Willy Tarreaua5e37562011-12-16 17:06:15 +01002015/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002016static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002017smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002018{
Willy Tarreaube508f12016-03-10 11:47:01 +01002019 if (!smp->strm)
2020 return 0;
2021
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002022 if (!objt_server(smp->strm->target))
Willy Tarreau17af4192011-02-23 14:27:06 +01002023 return 0;
2024
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002025 smp->data.type = SMP_T_SINT;
Willy Tarreau1e582e52018-09-20 11:29:28 +02002026 smp->data.u.sint = __objt_server(smp->strm->target)->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002027
2028 return 1;
2029}
2030
Willy Tarreau34db1082012-04-19 17:16:54 +02002031/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002032 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002033 * undefined behaviour.
2034 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002035static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002036smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002037{
Willy Tarreau37406352012-04-23 16:16:37 +02002038 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002039 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002040 smp->data.u.sint = read_freq_ctr(&args->data.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002041 return 1;
2042}
2043
Willy Tarreau34db1082012-04-19 17:16:54 +02002044/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002045 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002046 * undefined behaviour.
2047 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002048static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002049smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002050{
Willy Tarreau37406352012-04-23 16:16:37 +02002051 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002052 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002053 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02002054 return 1;
2055}
2056
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002057/* set temp integer to the number of available connections across available
2058 * servers on the backend.
2059 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
2060 * undefined behaviour.
2061 */
2062static int
2063smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2064{
2065 struct server *iterator;
2066 struct proxy *px;
2067 unsigned int maxconn;
2068
2069 smp->flags = SMP_F_VOL_TEST;
2070 smp->data.type = SMP_T_SINT;
2071 smp->data.u.sint = 0;
2072
2073 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
2074 if (iterator->cur_state == SRV_ST_STOPPED)
2075 continue;
2076
2077 px = iterator->proxy;
2078 if (!srv_currently_usable(iterator) ||
2079 ((iterator->flags & SRV_F_BACKUP) &&
2080 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
2081 continue;
2082
2083 if (iterator->maxconn == 0) {
2084 /* one active server is unlimited, return -1 */
2085 smp->data.u.sint = -1;
2086 return 1;
2087 }
2088
2089 maxconn = srv_dynamic_maxconn(iterator);
2090 if (maxconn > iterator->cur_sess)
2091 smp->data.u.sint += maxconn - iterator->cur_sess;
2092 }
2093
2094 return 1;
2095}
2096
Willy Tarreau34db1082012-04-19 17:16:54 +02002097/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002098 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002099 * undefined behaviour.
2100 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002101static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002102smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002103{
Willy Tarreau37406352012-04-23 16:16:37 +02002104 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002105 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002106 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002107 return 1;
2108}
2109
Willy Tarreaua5e37562011-12-16 17:06:15 +01002110/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002111 * by the number of running servers and rounded up. If there is no running
2112 * server, we return twice the total, just as if we had half a running server.
2113 * This is more or less correct anyway, since we expect the last server to come
2114 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002115 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002116 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002117 */
2118static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002119smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002120{
2121 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002122 struct proxy *px;
Willy Tarreaua36af912009-10-10 12:02:45 +02002123
Willy Tarreau37406352012-04-23 16:16:37 +02002124 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002125 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002126 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002127
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002128 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002129
2130 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002131 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002132 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002133 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002134
2135 return 1;
2136}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002137
Willy Tarreau34db1082012-04-19 17:16:54 +02002138/* set temp integer to the number of concurrent connections on the server in the backend.
2139 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2140 * undefined behaviour.
2141 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002142static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002143smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002144{
Willy Tarreauf853c462012-04-23 18:53:56 +02002145 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002146 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002147 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002148 return 1;
2149}
2150
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002151/* set temp integer to the number of available connections on the server in the backend.
2152 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2153 * undefined behaviour.
2154 */
2155static int
2156smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2157{
2158 unsigned int maxconn;
2159
2160 smp->flags = SMP_F_VOL_TEST;
2161 smp->data.type = SMP_T_SINT;
2162
2163 if (args->data.srv->maxconn == 0) {
2164 /* one active server is unlimited, return -1 */
2165 smp->data.u.sint = -1;
2166 return 1;
2167 }
2168
2169 maxconn = srv_dynamic_maxconn(args->data.srv);
2170 if (maxconn > args->data.srv->cur_sess)
2171 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2172 else
2173 smp->data.u.sint = 0;
2174
2175 return 1;
2176}
2177
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002178/* set temp integer to the number of connections pending in the server's queue.
2179 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2180 * undefined behaviour.
2181 */
2182static int
2183smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2184{
2185 smp->flags = SMP_F_VOL_TEST;
2186 smp->data.type = SMP_T_SINT;
2187 smp->data.u.sint = args->data.srv->nbpend;
2188 return 1;
2189}
2190
Tait Clarridge7896d522012-12-05 21:39:31 -05002191/* set temp integer to the number of enabled servers on the proxy.
2192 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2193 * undefined behaviour.
2194 */
2195static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002196smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002197{
2198 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002199 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002200 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002201 return 1;
2202}
2203
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002204static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2205{
2206
2207 struct proxy *px;
2208
2209 if (!smp_make_safe(smp))
2210 return 0;
2211
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002212 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002213 if (!px)
2214 return 0;
2215
2216 smp->data.type = SMP_T_SINT;
2217 smp->data.u.sint = be_usable_srv(px);
2218
2219 return 1;
2220}
2221
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002222
2223/* Note: must not be declared <const> as its list will be overwritten.
2224 * Please take care of keeping this list alphabetically sorted.
2225 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002226static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002227 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2228 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002229 { "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 +02002230 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002231 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002232 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2233 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2234 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2235 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2236 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002237 { "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 +02002238 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002239 { "srv_is_up", smp_fetch_srv_is_up, ARG1(1,SRV), NULL, SMP_T_BOOL, SMP_USE_INTRN, },
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002240 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002241 { "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 +01002242 { /* END */ },
2243}};
2244
Willy Tarreau0108d902018-11-25 19:14:37 +01002245INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2246
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002247/* Note: must not be declared <const> as its list will be overwritten */
2248static struct sample_conv_kw_list sample_conv_kws = {ILH, {
2249 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2250 { /* END */ },
2251}};
2252
Willy Tarreau0108d902018-11-25 19:14:37 +01002253INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002254
Willy Tarreau61612d42012-04-19 18:42:05 +02002255/* Note: must not be declared <const> as its list will be overwritten.
2256 * Please take care of keeping this list alphabetically sorted.
2257 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002258static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002259 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002260}};
2261
Willy Tarreau0108d902018-11-25 19:14:37 +01002262INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002263
Willy Tarreaubaaee002006-06-26 02:48:02 +02002264/*
2265 * Local variables:
2266 * c-indent-level: 8
2267 * c-basic-offset: 8
2268 * End:
2269 */