blob: 872050244ab18fe7bc5c3aa60238ae6d50cd7dff [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Backend variables and functions.
3 *
Willy Tarreau1a7eca12013-01-07 22:38:03 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +02005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <syslog.h>
Willy Tarreauf19cf372006-11-14 15:40:51 +010018#include <string.h>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +020019#include <ctype.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040020#include <sys/types.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
Willy Tarreauc7e42382012-08-24 19:22:53 +020022#include <common/buffer.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020023#include <common/compat.h>
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020024#include <common/config.h>
Willy Tarreau7c669d72008-06-20 15:04:11 +020025#include <common/debug.h>
Bhaskar98634f02013-10-29 23:30:51 -040026#include <common/hash.h>
Christopher Fauletf7679ad2019-02-04 12:02:18 +010027#include <common/htx.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010028#include <common/initcall.h>
Willy Tarreau0c303ee2008-07-07 00:09:58 +020029#include <common/ticks.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020030#include <common/time.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010031#include <common/namespace.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020032
Willy Tarreaubaaee002006-06-26 02:48:02 +020033#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020034
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +010035#include <proto/acl.h>
Willy Tarreau34db1082012-04-19 17:16:54 +020036#include <proto/arg.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020037#include <proto/backend.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020038#include <proto/channel.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +020039#include <proto/frontend.h>
Christopher Fauletf7679ad2019-02-04 12:02:18 +010040#include <proto/http_htx.h>
Willy Tarreau6b2e11b2009-10-01 07:52:15 +020041#include <proto/lb_chash.h>
Willy Tarreauf09c6602012-02-13 17:12:08 +010042#include <proto/lb_fas.h>
Willy Tarreauf89c1872009-10-01 11:19:37 +020043#include <proto/lb_fwlc.h>
44#include <proto/lb_fwrr.h>
45#include <proto/lb_map.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020046#include <proto/log.h>
Willy Tarreau53a47662017-08-28 10:53:00 +020047#include <proto/mux_pt.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010048#include <proto/obj_type.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010049#include <proto/payload.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020050#include <proto/protocol.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020051#include <proto/proto_http.h>
Willy Tarreaua8f55d52010-05-31 17:44:19 +020052#include <proto/proto_tcp.h>
Willy Tarreau4aac7db2014-05-16 11:48:10 +020053#include <proto/proxy.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020054#include <proto/queue.h>
Willy Tarreaud4c33c82013-01-07 21:59:07 +010055#include <proto/sample.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +010056#include <proto/server.h>
Olivier Houchard00cf70f2018-11-30 17:24:55 +010057#include <proto/session.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020058#include <proto/stream.h>
Willy Tarreau9e000c62011-03-10 14:03:36 +010059#include <proto/stream_interface.h>
Willy Tarreau732eac42015-07-09 11:40:25 +020060#include <proto/ssl_sock.h>
Willy Tarreauc125cef2019-05-10 09:58:43 +020061#include <proto/task.h>
Willy Tarreau732eac42015-07-09 11:40:25 +020062
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050063int be_lastsession(const struct proxy *be)
64{
65 if (be->be_counters.last_sess)
66 return now.tv_sec - be->be_counters.last_sess;
67
68 return -1;
69}
70
Bhaskar98634f02013-10-29 23:30:51 -040071/* helper function to invoke the correct hash method */
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070072static unsigned int gen_hash(const struct proxy* px, const char* key, unsigned long len)
Bhaskar98634f02013-10-29 23:30:51 -040073{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070074 unsigned int hash;
Bhaskar98634f02013-10-29 23:30:51 -040075
76 switch (px->lbprm.algo & BE_LB_HASH_FUNC) {
77 case BE_LB_HFCN_DJB2:
78 hash = hash_djb2(key, len);
79 break;
Willy Tarreaua0f42712013-11-14 14:30:35 +010080 case BE_LB_HFCN_WT6:
81 hash = hash_wt6(key, len);
82 break;
Willy Tarreau324f07f2015-01-20 19:44:50 +010083 case BE_LB_HFCN_CRC32:
84 hash = hash_crc32(key, len);
85 break;
Bhaskar98634f02013-10-29 23:30:51 -040086 case BE_LB_HFCN_SDBM:
87 /* this is the default hash function */
88 default:
89 hash = hash_sdbm(key, len);
90 break;
91 }
92
93 return hash;
94}
95
Willy Tarreaubaaee002006-06-26 02:48:02 +020096/*
97 * This function recounts the number of usable active and backup servers for
98 * proxy <p>. These numbers are returned into the p->srv_act and p->srv_bck.
Willy Tarreaub625a082007-11-26 01:15:43 +010099 * This function also recomputes the total active and backup weights. However,
Willy Tarreauf4cca452008-03-08 21:42:54 +0100100 * it does not update tot_weight nor tot_used. Use update_backend_weight() for
Willy Tarreaub625a082007-11-26 01:15:43 +0100101 * this.
Emeric Brun52a91d32017-08-31 14:41:55 +0200102 * This functions is designed to be called before server's weight and state
103 * commit so it uses 'next' weight and states values.
Christopher Faulet5b517552017-06-09 14:17:53 +0200104 *
105 * threads: this is the caller responsibility to lock data. For now, this
106 * function is called from lb modules, so it should be ok. But if you need to
107 * call it from another place, be careful (and update this comment).
Willy Tarreaubaaee002006-06-26 02:48:02 +0200108 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200109void recount_servers(struct proxy *px)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200110{
111 struct server *srv;
112
Willy Tarreau20697042007-11-15 23:26:18 +0100113 px->srv_act = px->srv_bck = 0;
114 px->lbprm.tot_wact = px->lbprm.tot_wbck = 0;
Willy Tarreaub625a082007-11-26 01:15:43 +0100115 px->lbprm.fbck = NULL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200116 for (srv = px->srv; srv != NULL; srv = srv->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +0200117 if (!srv_willbe_usable(srv))
Willy Tarreaub625a082007-11-26 01:15:43 +0100118 continue;
119
Willy Tarreauc93cd162014-05-13 15:54:22 +0200120 if (srv->flags & SRV_F_BACKUP) {
Willy Tarreaub625a082007-11-26 01:15:43 +0100121 if (!px->srv_bck &&
Willy Tarreauf4cca452008-03-08 21:42:54 +0100122 !(px->options & PR_O_USE_ALL_BK))
Willy Tarreaub625a082007-11-26 01:15:43 +0100123 px->lbprm.fbck = srv;
124 px->srv_bck++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400125 srv->cumulative_weight = px->lbprm.tot_wbck;
Emeric Brun52a91d32017-08-31 14:41:55 +0200126 px->lbprm.tot_wbck += srv->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100127 } else {
128 px->srv_act++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400129 srv->cumulative_weight = px->lbprm.tot_wact;
Emeric Brun52a91d32017-08-31 14:41:55 +0200130 px->lbprm.tot_wact += srv->next_eweight;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200131 }
132 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100133}
Willy Tarreau20697042007-11-15 23:26:18 +0100134
Willy Tarreaub625a082007-11-26 01:15:43 +0100135/* This function simply updates the backend's tot_weight and tot_used values
136 * after servers weights have been updated. It is designed to be used after
137 * recount_servers() or equivalent.
Christopher Faulet5b517552017-06-09 14:17:53 +0200138 *
139 * threads: this is the caller responsibility to lock data. For now, this
140 * function is called from lb modules, so it should be ok. But if you need to
141 * call it from another place, be careful (and update this comment).
Willy Tarreaub625a082007-11-26 01:15:43 +0100142 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200143void update_backend_weight(struct proxy *px)
Willy Tarreaub625a082007-11-26 01:15:43 +0100144{
Willy Tarreau20697042007-11-15 23:26:18 +0100145 if (px->srv_act) {
146 px->lbprm.tot_weight = px->lbprm.tot_wact;
147 px->lbprm.tot_used = px->srv_act;
148 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100149 else if (px->lbprm.fbck) {
150 /* use only the first backup server */
Emeric Brun52a91d32017-08-31 14:41:55 +0200151 px->lbprm.tot_weight = px->lbprm.fbck->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100152 px->lbprm.tot_used = 1;
Willy Tarreau20697042007-11-15 23:26:18 +0100153 }
154 else {
Willy Tarreaub625a082007-11-26 01:15:43 +0100155 px->lbprm.tot_weight = px->lbprm.tot_wbck;
156 px->lbprm.tot_used = px->srv_bck;
Willy Tarreau20697042007-11-15 23:26:18 +0100157 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100158}
159
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200160/*
161 * This function tries to find a running server for the proxy <px> following
162 * the source hash method. Depending on the number of active/backup servers,
163 * it will either look for active servers, or for backup servers.
164 * If any server is found, it will be returned. If no valid server is found,
165 * NULL is returned.
166 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100167static struct server *get_server_sh(struct proxy *px, const char *addr, int len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200168{
169 unsigned int h, l;
170
171 if (px->lbprm.tot_weight == 0)
172 return NULL;
173
174 l = h = 0;
175
176 /* note: we won't hash if there's only one server left */
177 if (px->lbprm.tot_used == 1)
178 goto hash_done;
179
180 while ((l + sizeof (int)) <= len) {
181 h ^= ntohl(*(unsigned int *)(&addr[l]));
182 l += sizeof (int);
183 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500184 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100185 h = full_hash(h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200186 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100187 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100188 return chash_get_server_hash(px, h, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200189 else
190 return map_get_server_hash(px, h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200191}
192
193/*
194 * This function tries to find a running server for the proxy <px> following
195 * the URI hash method. In order to optimize cache hits, the hash computation
196 * ends at the question mark. Depending on the number of active/backup servers,
197 * it will either look for active servers, or for backup servers.
198 * If any server is found, it will be returned. If no valid server is found,
Willy Tarreaua9a72492019-01-14 16:14:15 +0100199 * NULL is returned. The lbprm.arg_opt{1,2,3} values correspond respectively to
200 * the "whole" optional argument (boolean), the "len" argument (numeric) and
201 * the "depth" argument (numeric).
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200202 *
203 * This code was contributed by Guillaume Dallaire, who also selected this hash
204 * algorithm out of a tens because it gave him the best results.
205 *
206 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100207static struct server *get_server_uh(struct proxy *px, char *uri, int uri_len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200208{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700209 unsigned int hash = 0;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200210 int c;
211 int slashes = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400212 const char *start, *end;
vend_natalie.chenfb928392019-12-09 14:43:49 +0800213 int depth = 1;
214 int orig_uri_len = uri_len;
215 const char *orig_start;
216 const char *p, *params;
217 int buflen = 0;
218 char *buf;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200219
220 if (px->lbprm.tot_weight == 0)
221 return NULL;
222
223 /* note: we won't hash if there's only one server left */
224 if (px->lbprm.tot_used == 1)
225 goto hash_done;
226
Willy Tarreaua9a72492019-01-14 16:14:15 +0100227 if (px->lbprm.arg_opt2) // "len"
228 uri_len = MIN(uri_len, px->lbprm.arg_opt2);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200229
vend_natalie.chenfb928392019-12-09 14:43:49 +0800230 orig_start = start = end = uri;
231 if (px->lbprm.arg_opt4 == 1) {
232 p = memchr(uri, '?', uri_len);
233 params = p;
234 if (p) {
235 p++;
236 uri_len = p - uri;
237 params = p;
238 if (p[7] == '=') {
239 if (memcmp(p, "service", 7) == 0) {
240 p += 8;
241 depth = 2;
242 }
243 }
244 }
245
246 end = uri + uri_len - 1;
247 while (uri_len--) {
248 c = *end;
249 if (c == '/') {
250 if (p == NULL)
251 p = end + 1;
252 slashes++;
253 if (slashes == depth)
254 break;
255 }
256 end--;
257 }
258 if (p != NULL && (!strncmp(p, "git-receive-pack", 16) || !strncmp(p, "git-upload-pack", 15))) {
natalie10be5b12021-08-24 13:30:19 +0800259 if (!strncmp(start, "/a/", 3) || !strncmp(start, "/p/", 3))
260 start += 2;
261 // we have git request here
vend_natalie.chenfb928392019-12-09 14:43:49 +0800262 // get rid of redundant '/'
263 while ((end - start) > 1 && *(start+1) == '/')
264 start++;
265 while ((end - start) > 1 && *(end-1) == '/')
266 end--;
267 // get rid of trailing ".git"
268 if ((end - start) > 4 && strncmp(end-4, ".git", 4) == 0)
269 end -= 4;
natalie10be5b12021-08-24 13:30:19 +0800270 // get rid of redundant '/'
271 while ((end - start) > 1 && *(end-1) == '/')
272 end--;
vend_natalie.chenfb928392019-12-09 14:43:49 +0800273 hash = gen_hash(px, start, (end - start));
274 } else {
275 if (px->lbprm.arg_opt3 > 0){
276 // reset state
277 uri_len = orig_uri_len;
278 if (params != NULL)
279 uri_len = params - uri;
280 depth = px->lbprm.arg_opt3;
281 slashes = 0;
282 buf = (char *)malloc(uri_len);
283 orig_start = start = end = uri;
284 while (uri_len--) {
285 c = *end;
286 if (c == '/') {
287 if (slashes == 1 && end - start == 2) {
288 depth += 1;
289 orig_start = start = end;
290 }
291 slashes++;
292 if (slashes == depth - 1) {
293 if (memcmp(start, "/changes", end - start) != 0 && memcmp(start, "/projects", end - start) != 0)
294 break;
295 start = end;
296 p = start;
297 }
298 else if (slashes == depth) { /* depth+1 */
299 memcpy(buf + buflen, p, end - p);
300 buflen += (end - p);
301 break;
302 }
303 }
304 else if (c == '%') {
305 if (orig_start != start && uri_len > 2 && (memcmp(end, "%2F", 3) == 0 || memcmp(end, "%2f", 3) == 0)) {
306 memcpy(buf + buflen, p, end - p);
307 buflen += (end - p) + 1;
308 buf[buflen - 1] = '/';
309 p = end + 3;
310 }
311 }
312 else if (c == '~') {
313 if (orig_start != start) {
314 memcpy(buf + buflen, p, end - p);
315 buflen += (end - p);
316 break;
317 }
318 }
319 end++;
320 }
321 }
322 if (buflen > 0)
323 hash = gen_hash(px, buf, buflen);
324 if (buf != NULL)
325 free(buf);
326 if (buflen <= 0) /*let's fallback to round robin */
327 return NULL;
328 }
329 } else {
330 while (uri_len--) {
331 c = *end;
332 if (c == '/') {
333 slashes++;
334 if (slashes == px->lbprm.arg_opt3) /* depth+1 */
335 break;
336 }
337 else if (c == '?' && !px->lbprm.arg_opt1) // "whole"
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200338 break;
vend_natalie.chenfb928392019-12-09 14:43:49 +0800339 end++;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200340 }
Bhaskar98634f02013-10-29 23:30:51 -0400341
vend_natalie.chenfb928392019-12-09 14:43:49 +0800342 hash = gen_hash(px, start, (end - start));
343 }
Bhaskar98634f02013-10-29 23:30:51 -0400344
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500345 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100346 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200347 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100348 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100349 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200350 else
351 return map_get_server_hash(px, hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200352}
353
Christopher Faulet5b517552017-06-09 14:17:53 +0200354/*
Willy Tarreau01732802007-11-01 22:48:15 +0100355 * This function tries to find a running server for the proxy <px> following
356 * the URL parameter hash method. It looks for a specific parameter in the
357 * URL and hashes it to compute the server ID. This is useful to optimize
358 * performance by avoiding bounces between servers in contexts where sessions
359 * are shared but cookies are not usable. If the parameter is not found, NULL
360 * is returned. If any server is found, it will be returned. If no valid server
361 * is found, NULL is returned.
Willy Tarreau01732802007-11-01 22:48:15 +0100362 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100363static 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 +0100364{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700365 unsigned int hash = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400366 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200367 const char *p;
368 const char *params;
Willy Tarreau01732802007-11-01 22:48:15 +0100369 int plen;
370
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200371 /* when tot_weight is 0 then so is srv_count */
Willy Tarreau20697042007-11-15 23:26:18 +0100372 if (px->lbprm.tot_weight == 0)
Willy Tarreau01732802007-11-01 22:48:15 +0100373 return NULL;
374
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200375 if ((p = memchr(uri, '?', uri_len)) == NULL)
376 return NULL;
377
Willy Tarreau01732802007-11-01 22:48:15 +0100378 p++;
379
380 uri_len -= (p - uri);
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100381 plen = px->lbprm.arg_len;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200382 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100383
384 while (uri_len > plen) {
385 /* Look for the parameter name followed by an equal symbol */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200386 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100387 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200388 /* OK, we have the parameter here at <params>, and
Willy Tarreau01732802007-11-01 22:48:15 +0100389 * the value after the equal sign, at <p>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200390 * skip the equal symbol
Willy Tarreau01732802007-11-01 22:48:15 +0100391 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200392 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400393 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200394 uri_len -= plen + 1;
395
Bhaskar98634f02013-10-29 23:30:51 -0400396 while (uri_len && *end != '&') {
Willy Tarreau01732802007-11-01 22:48:15 +0100397 uri_len--;
Bhaskar98634f02013-10-29 23:30:51 -0400398 end++;
Willy Tarreau01732802007-11-01 22:48:15 +0100399 }
Bhaskar98634f02013-10-29 23:30:51 -0400400 hash = gen_hash(px, start, (end - start));
401
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500402 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100403 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400404
Willy Tarreau6c30be52019-01-14 17:07:39 +0100405 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100406 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200407 else
408 return map_get_server_hash(px, hash);
Willy Tarreau01732802007-11-01 22:48:15 +0100409 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200410 }
411 /* skip to next parameter */
412 p = memchr(params, '&', uri_len);
413 if (!p)
414 return NULL;
415 p++;
416 uri_len -= (p - params);
417 params = p;
418 }
419 return NULL;
420}
421
422/*
423 * this does the same as the previous server_ph, but check the body contents
424 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100425static struct server *get_server_ph_post(struct stream *s, const struct server *avoid)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200426{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700427 unsigned int hash = 0;
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100428 struct channel *req = &s->req;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200429 struct proxy *px = s->be;
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100430 unsigned int plen = px->lbprm.arg_len;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100431 unsigned long len;
432 const char *params, *p, *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200433
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100434 if (px->lbprm.tot_weight == 0)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200435 return NULL;
436
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100437 if (!IS_HTX_STRM(s)) {
438 struct http_txn *txn = s->txn;
439 struct http_msg *msg = &txn->req;
Willy Tarreauf69d4ff2015-05-02 00:05:47 +0200440
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100441 len = http_body_bytes(msg);
442 p = params = c_ptr(req, -http_data_rewind(msg));
443
444 if (len == 0)
445 return NULL;
446 if (len > b_wrap(&req->buf) - p)
447 len = b_wrap(&req->buf) - p;
448
449 }
450 else {
451 struct htx *htx = htxbuf(&req->buf);
452 struct htx_blk *blk;
453
454 p = params = NULL;
455 len = 0;
Christopher Fauleta3f15502019-05-13 15:27:23 +0200456 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100457 enum htx_blk_type type = htx_get_blk_type(blk);
458 struct ist v;
459
460 if (type != HTX_BLK_DATA)
461 continue;
462 v = htx_get_blk_value(htx, blk);
463 p = params = v.ptr;
464 len = v.len;
465 break;
466 }
467 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200468
469 while (len > plen) {
470 /* Look for the parameter name followed by an equal symbol */
471 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100472 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200473 /* OK, we have the parameter here at <params>, and
474 * the value after the equal sign, at <p>
475 * skip the equal symbol
476 */
477 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400478 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200479 len -= plen + 1;
480
Bhaskar98634f02013-10-29 23:30:51 -0400481 while (len && *end != '&') {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200482 if (unlikely(!HTTP_IS_TOKEN(*p))) {
Willy Tarreau157dd632009-12-06 19:18:09 +0100483 /* if in a POST, body must be URI encoded or it's not a URI.
Bhaskar98634f02013-10-29 23:30:51 -0400484 * Do not interpret any possible binary data as a parameter.
Willy Tarreau157dd632009-12-06 19:18:09 +0100485 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200486 if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */
487 break;
488 return NULL; /* oh, no; this is not uri-encoded.
489 * This body does not contain parameters.
490 */
491 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200492 len--;
Bhaskar98634f02013-10-29 23:30:51 -0400493 end++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200494 /* should we break if vlen exceeds limit? */
495 }
Bhaskar98634f02013-10-29 23:30:51 -0400496 hash = gen_hash(px, start, (end - start));
497
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500498 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100499 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400500
Willy Tarreau6c30be52019-01-14 17:07:39 +0100501 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100502 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200503 else
504 return map_get_server_hash(px, hash);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200505 }
506 }
Willy Tarreau01732802007-11-01 22:48:15 +0100507 /* skip to next parameter */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200508 p = memchr(params, '&', len);
Willy Tarreau01732802007-11-01 22:48:15 +0100509 if (!p)
510 return NULL;
511 p++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200512 len -= (p - params);
513 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100514 }
515 return NULL;
516}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200517
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200518
Willy Tarreaubaaee002006-06-26 02:48:02 +0200519/*
Benoitaffb4812009-03-25 13:02:10 +0100520 * This function tries to find a running server for the proxy <px> following
521 * the Header parameter hash method. It looks for a specific parameter in the
522 * URL and hashes it to compute the server ID. This is useful to optimize
523 * performance by avoiding bounces between servers in contexts where sessions
524 * are shared but cookies are not usable. If the parameter is not found, NULL
525 * is returned. If any server is found, it will be returned. If no valid server
Willy Tarreau9fed8582019-01-14 16:04:54 +0100526 * is found, NULL is returned. When lbprm.arg_opt1 is set, the hash will only
527 * apply to the middle part of a domain name ("use_domain_only" option).
Benoitaffb4812009-03-25 13:02:10 +0100528 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100529static struct server *get_server_hh(struct stream *s, const struct server *avoid)
Benoitaffb4812009-03-25 13:02:10 +0100530{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700531 unsigned int hash = 0;
Benoitaffb4812009-03-25 13:02:10 +0100532 struct proxy *px = s->be;
Willy Tarreau484ff072019-01-14 15:28:53 +0100533 unsigned int plen = px->lbprm.arg_len;
Benoitaffb4812009-03-25 13:02:10 +0100534 unsigned long len;
Benoitaffb4812009-03-25 13:02:10 +0100535 const char *p;
Bhaskar98634f02013-10-29 23:30:51 -0400536 const char *start, *end;
Benoitaffb4812009-03-25 13:02:10 +0100537
538 /* tot_weight appears to mean srv_count */
539 if (px->lbprm.tot_weight == 0)
540 return NULL;
541
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200542 /* note: we won't hash if there's only one server left */
543 if (px->lbprm.tot_used == 1)
544 goto hash_done;
545
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100546 if (!IS_HTX_STRM(s)) {
547 struct http_txn *txn = s->txn;
548 struct hdr_ctx ctx = { .idx = 0 };
549
550 /* if the message is chunked, we skip the chunk size, but use the value as len */
551 http_find_header2(px->lbprm.arg_str, plen, c_ptr(&s->req, -http_hdr_rewind(&txn->req)),
552 &txn->hdr_idx, &ctx);
553
554 /* if the header is not found or empty, let's fallback to round robin */
555 if (!ctx.idx || !ctx.vlen)
556 return NULL;
557
558 /* Found the param_name in the headers.
559 * we will compute the hash based on this value ctx.val.
560 */
561 len = ctx.vlen;
562 p = (char *)ctx.line + ctx.val;
563 }
564 else {
565 struct htx *htx = htxbuf(&s->req.buf);
566 struct http_hdr_ctx ctx = { .blk = NULL };
567
568 http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0);
569
570 /* if the header is not found or empty, let's fallback to round robin */
571 if (!ctx.blk || !ctx.value.len)
572 return NULL;
573
574 /* Found a the param_name in the headers.
575 * we will compute the hash based on this value ctx.val.
576 */
577 len = ctx.value.len;
578 p = ctx.value.ptr;
579 }
580
Willy Tarreau9fed8582019-01-14 16:04:54 +0100581 if (!px->lbprm.arg_opt1) {
Bhaskar98634f02013-10-29 23:30:51 -0400582 hash = gen_hash(px, p, len);
Benoitaffb4812009-03-25 13:02:10 +0100583 } else {
584 int dohash = 0;
Cyril Bontéf607d812015-01-04 15:17:36 +0100585 p += len;
Benoitaffb4812009-03-25 13:02:10 +0100586 /* special computation, use only main domain name, not tld/host
587 * going back from the end of string, start hashing at first
588 * dot stop at next.
589 * This is designed to work with the 'Host' header, and requires
590 * a special option to activate this.
591 */
Cyril Bontéf607d812015-01-04 15:17:36 +0100592 end = p;
Benoitaffb4812009-03-25 13:02:10 +0100593 while (len) {
Cyril Bontéf607d812015-01-04 15:17:36 +0100594 if (dohash) {
595 /* Rewind the pointer until the previous char
596 * is a dot, this will allow to set the start
597 * position of the domain. */
598 if (*(p - 1) == '.')
Benoitaffb4812009-03-25 13:02:10 +0100599 break;
Benoitaffb4812009-03-25 13:02:10 +0100600 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100601 else if (*p == '.') {
602 /* The pointer is rewinded to the dot before the
603 * tld, we memorize the end of the domain and
604 * can enter the domain processing. */
605 end = p;
606 dohash = 1;
607 }
Benoitaffb4812009-03-25 13:02:10 +0100608 p--;
Cyril Bontéf607d812015-01-04 15:17:36 +0100609 len--;
Benoitaffb4812009-03-25 13:02:10 +0100610 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100611 start = p;
Bhaskar98634f02013-10-29 23:30:51 -0400612 hash = gen_hash(px, start, (end - start));
Benoitaffb4812009-03-25 13:02:10 +0100613 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500614 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100615 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200616 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100617 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100618 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200619 else
620 return map_get_server_hash(px, hash);
Benoitaffb4812009-03-25 13:02:10 +0100621}
622
Willy Tarreau34db1082012-04-19 17:16:54 +0200623/* RDP Cookie HASH. */
Willy Tarreau59884a62019-01-02 14:48:31 +0100624static struct server *get_server_rch(struct stream *s, const struct server *avoid)
Emeric Brun736aa232009-06-30 17:56:00 +0200625{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700626 unsigned int hash = 0;
Emeric Brun736aa232009-06-30 17:56:00 +0200627 struct proxy *px = s->be;
628 unsigned long len;
Emeric Brun736aa232009-06-30 17:56:00 +0200629 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +0200630 struct sample smp;
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200631 int rewind;
Emeric Brun736aa232009-06-30 17:56:00 +0200632
633 /* tot_weight appears to mean srv_count */
634 if (px->lbprm.tot_weight == 0)
635 return NULL;
636
Willy Tarreau37406352012-04-23 16:16:37 +0200637 memset(&smp, 0, sizeof(smp));
Emeric Brun736aa232009-06-30 17:56:00 +0200638
Willy Tarreau6a445eb2018-06-19 07:04:45 +0200639 rewind = co_data(&s->req);
640 c_rew(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200641
Willy Tarreau484ff072019-01-14 15:28:53 +0100642 ret = fetch_rdp_cookie_name(s, &smp, px->lbprm.arg_str, px->lbprm.arg_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200643 len = smp.data.u.str.data;
Willy Tarreau664092c2011-12-16 19:11:42 +0100644
Willy Tarreaubcbd3932018-06-06 07:13:22 +0200645 c_adv(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200646
Willy Tarreau37406352012-04-23 16:16:37 +0200647 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0)
Emeric Brun736aa232009-06-30 17:56:00 +0200648 return NULL;
649
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200650 /* note: we won't hash if there's only one server left */
651 if (px->lbprm.tot_used == 1)
652 goto hash_done;
653
Willy Tarreau484ff072019-01-14 15:28:53 +0100654 /* Found the param_name in the headers.
Emeric Brun736aa232009-06-30 17:56:00 +0200655 * we will compute the hash based on this value ctx.val.
656 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200657 hash = gen_hash(px, smp.data.u.str.area, len);
Bhaskar98634f02013-10-29 23:30:51 -0400658
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500659 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100660 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200661 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100662 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100663 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200664 else
665 return map_get_server_hash(px, hash);
Emeric Brun736aa232009-06-30 17:56:00 +0200666}
Christopher Faulet5b517552017-06-09 14:17:53 +0200667
Willy Tarreau760e81d2018-05-03 07:20:40 +0200668/* random value */
Willy Tarreau59884a62019-01-02 14:48:31 +0100669static struct server *get_server_rnd(struct stream *s, const struct server *avoid)
Willy Tarreau760e81d2018-05-03 07:20:40 +0200670{
671 unsigned int hash = 0;
672 struct proxy *px = s->be;
Willy Tarreau21c741a2019-01-14 18:14:27 +0100673 struct server *prev, *curr;
674 int draws = px->lbprm.arg_opt1; // number of draws
Willy Tarreau760e81d2018-05-03 07:20:40 +0200675
676 /* tot_weight appears to mean srv_count */
677 if (px->lbprm.tot_weight == 0)
678 return NULL;
679
Willy Tarreau21c741a2019-01-14 18:14:27 +0100680 curr = NULL;
681 do {
682 prev = curr;
Willy Tarreau511213f2020-03-08 17:31:39 +0100683 hash = ha_random32();
Willy Tarreau21c741a2019-01-14 18:14:27 +0100684 curr = chash_get_server_hash(px, hash, avoid);
685 if (!curr)
686 break;
687
688 /* compare the new server to the previous best choice and pick
689 * the one with the least currently served requests.
690 */
691 if (prev && prev != curr &&
692 curr->served * prev->cur_eweight > prev->served * curr->cur_eweight)
693 curr = prev;
694 } while (--draws > 0);
695
696 return curr;
Willy Tarreau760e81d2018-05-03 07:20:40 +0200697}
698
Benoitaffb4812009-03-25 13:02:10 +0100699/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200700 * This function applies the load-balancing algorithm to the stream, as
701 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200702 * 'assigned'.
703 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200704 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200705 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100706 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200707 * The function tries to keep the original connection slot if it reconnects to
708 * the same server, otherwise it releases it and tries to offer it.
709 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200710 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200711 *
712 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100713 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200714 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
715 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200716 * SRV_STATUS_INTERNAL for other unrecoverable errors.
717 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200718 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100719 * it does not need to be called anymore. This means that target_srv(&s->target)
720 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200721 *
722 */
723
Willy Tarreau87b09662015-04-03 00:22:06 +0200724int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200725{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100726 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200727 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100728 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200729 int err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100730
Simon Horman8effd3d2011-08-13 08:03:52 +0900731 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200732
Willy Tarreau7c669d72008-06-20 15:04:11 +0200733 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200734 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200735 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100736
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100737 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200738 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200739
Willy Tarreau7c669d72008-06-20 15:04:11 +0200740 /* We have to release any connection slot before applying any LB algo,
741 * otherwise we may erroneously end up with no available slot.
742 */
743 if (conn_slot)
744 sess_change_server(s, NULL);
745
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100746 /* We will now try to find the good server and store it into <objt_server(s->target)>.
747 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200748 * as well as if no server is available (check error code).
749 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100750
Willy Tarreau827aee92011-03-10 16:55:02 +0100751 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100752 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100753
Olivier Houchardba4fff52018-12-01 14:40:40 +0100754 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200755 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100756 (s->be->options & PR_O_PREF_LAST))) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100757 struct sess_srv_list *srv_list;
758 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
759 struct server *tmpsrv = objt_server(srv_list->target);
Olivier Houchardba4fff52018-12-01 14:40:40 +0100760
761 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200762 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100763 (!s->be->max_ka_queue ||
764 server_has_room(tmpsrv) || (
765 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
766 srv_currently_usable(tmpsrv)) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100767 list_for_each_entry(conn, &srv_list->conn_list, session_list) {
Olivier Houchardba4fff52018-12-01 14:40:40 +0100768 if (conn->flags & CO_FL_CONNECTED) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100769
Olivier Houchardba4fff52018-12-01 14:40:40 +0100770 srv = tmpsrv;
771 s->target = &srv->obj_type;
Christopher Fauletc3db7c12020-07-01 18:56:30 +0200772 if (conn->flags & CO_FL_SESS_IDLE) {
773 conn->flags &= ~CO_FL_SESS_IDLE;
774 s->sess->idle_conns--;
775 }
Olivier Houchardba4fff52018-12-01 14:40:40 +0100776 goto out_ok;
777 }
778 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100779 }
780 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100781 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100782 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200783
Willy Tarreau7c669d72008-06-20 15:04:11 +0200784 /* we must check if we have at least one server available */
785 if (!s->be->lbprm.tot_weight) {
786 err = SRV_STATUS_NOSRV;
787 goto out;
788 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200789
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200790 /* First check whether we need to fetch some data or simply call
791 * the LB lookup function. Only the hashing functions will need
792 * some input data in fact, and will support multiple algorithms.
793 */
794 switch (s->be->lbprm.algo & BE_LB_LKUP) {
795 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100796 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200797 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200798
Willy Tarreauf09c6602012-02-13 17:12:08 +0100799 case BE_LB_LKUP_FSTREE:
800 srv = fas_get_next_server(s->be, prev_srv);
801 break;
802
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200803 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100804 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200805 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200806
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200807 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200808 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200809 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200810 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
Willy Tarreau59884a62019-01-02 14:48:31 +0100811 srv = get_server_rnd(s, prev_srv);
Willy Tarreau6c30be52019-01-14 17:07:39 +0100812 else if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100813 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200814 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100815 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200816 break;
817 }
818 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200819 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200820 err = SRV_STATUS_INTERNAL;
821 goto out;
822 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200823
824 switch (s->be->lbprm.algo & BE_LB_PARM) {
825 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200826 conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200827 if (conn && conn->addr.from.ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200828 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200829 (void *)&((struct sockaddr_in *)&conn->addr.from)->sin_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100830 4, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200831 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200832 else if (conn && conn->addr.from.ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200833 srv = get_server_sh(s->be,
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200834 (void *)&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100835 16, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200836 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200837 else {
838 /* unknown IP family */
839 err = SRV_STATUS_INTERNAL;
840 goto out;
841 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200842 break;
843
844 case BE_LB_HASH_URI:
845 /* URI hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200846 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100847 break;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100848 if (!IS_HTX_STRM(s))
849 srv = get_server_uh(s->be,
850 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
851 s->txn->req.sl.rq.u_l, prev_srv);
852 else {
853 struct ist uri;
854
Christopher Faulet297fbb42019-05-13 14:41:27 +0200855 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100856 srv = get_server_uh(s->be, uri.ptr, uri.len, prev_srv);
857 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200858 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200859
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200860 case BE_LB_HASH_PRM:
861 /* URL Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200862 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100863 break;
Willy Tarreau61a21a32011-03-01 20:35:49 +0100864
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100865 if (!IS_HTX_STRM(s))
866 srv = get_server_ph(s->be,
867 c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
868 s->txn->req.sl.rq.u_l, prev_srv);
869 else {
870 struct ist uri;
871
Christopher Faulet297fbb42019-05-13 14:41:27 +0200872 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100873 srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv);
874 }
Willy Tarreau61a21a32011-03-01 20:35:49 +0100875
Willy Tarreaueee5b512015-04-03 23:46:31 +0200876 if (!srv && s->txn->meth == HTTP_METH_POST)
Willy Tarreau59884a62019-01-02 14:48:31 +0100877 srv = get_server_ph_post(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200878 break;
Benoitaffb4812009-03-25 13:02:10 +0100879
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200880 case BE_LB_HASH_HDR:
881 /* Header Parameter hashing */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200882 if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
Willy Tarreaueaed5a12010-03-24 14:54:30 +0100883 break;
Willy Tarreau59884a62019-01-02 14:48:31 +0100884 srv = get_server_hh(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200885 break;
886
887 case BE_LB_HASH_RDP:
888 /* RDP Cookie hashing */
Willy Tarreau59884a62019-01-02 14:48:31 +0100889 srv = get_server_rch(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200890 break;
891
892 default:
893 /* unknown balancing algorithm */
894 err = SRV_STATUS_INTERNAL;
895 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100896 }
Emeric Brun736aa232009-06-30 17:56:00 +0200897
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200898 /* If the hashing parameter was not found, let's fall
899 * back to round robin on the map.
900 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100901 if (!srv) {
Willy Tarreau6c30be52019-01-14 17:07:39 +0100902 if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100903 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200904 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100905 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200906 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200907
908 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200909 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200910
Willy Tarreau7c669d72008-06-20 15:04:11 +0200911 default:
912 /* unknown balancing algorithm */
913 err = SRV_STATUS_INTERNAL;
914 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200915 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200916
Willy Tarreau827aee92011-03-10 16:55:02 +0100917 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200918 err = SRV_STATUS_FULL;
919 goto out;
920 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100921 else if (srv != prev_srv) {
Olivier Houchard237f7812019-03-08 18:49:07 +0100922 _HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
923 _HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100924 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100925 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200926 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200927 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100928 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200929 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100930 else if ((s->be->options & PR_O_HTTP_PROXY)) {
931 conn = cs_conn(objt_cs(s->si[1].end));
932
933 if (conn && is_addr(&conn->addr.to)) {
934 /* in proxy mode, we need a valid destination address */
935 s->target = &s->be->obj_type;
936 } else {
937 err = SRV_STATUS_NOSRV;
938 goto out;
939 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100940 }
941 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200942 err = SRV_STATUS_NOSRV;
943 goto out;
944 }
945
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100946out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200947 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200948 err = SRV_STATUS_OK;
949 out:
950
951 /* Either we take back our connection slot, or we offer it to someone
952 * else if we don't need it anymore.
953 */
954 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100955 if (conn_slot == srv) {
956 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200957 } else {
958 if (may_dequeue_tasks(conn_slot, s->be))
959 process_srv_queue(conn_slot);
960 }
961 }
962
963 out_err:
964 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200965}
966
Willy Tarreaubaaee002006-06-26 02:48:02 +0200967/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200968 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200969 * The address is taken from the currently assigned server, or from the
970 * dispatch or transparent address.
971 *
972 * It may return :
973 * SRV_STATUS_OK if everything is OK.
974 * SRV_STATUS_INTERNAL for other unrecoverable errors.
975 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200976 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200977 * not cleared, so it's to the caller to clear it if required.
978 *
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200979 * The caller is responsible for having already assigned a connection
980 * to si->end.
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200981 *
Willy Tarreaubaaee002006-06-26 02:48:02 +0200982 */
Olivier Houchard201b9f42018-11-21 00:16:29 +0100983int assign_server_address(struct stream *s, struct connection *srv_conn)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200984{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200985 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200986
Christopher Faulet56803b12017-11-24 16:06:18 +0100987 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200988
Willy Tarreaue7dff022015-04-03 01:14:29 +0200989 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200990 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200991 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200992 return SRV_STATUS_INTERNAL;
993
Willy Tarreau1e582e52018-09-20 11:29:28 +0200994 srv_conn->addr.to = __objt_server(s->target)->addr;
995 set_host_port(&srv_conn->addr.to, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200996
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200997 if (!is_addr(&srv_conn->addr.to) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200998 /* if the server has no address, we use the same address
999 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +02001000 * locally on multiple addresses at once. Nothing is done
1001 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +02001002 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001003 conn_get_to_addr(cli_conn);
Willy Tarreaud669a4f2010-07-13 14:49:50 +02001004
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001005 if (cli_conn->addr.to.ss_family == AF_INET) {
1006 ((struct sockaddr_in *)&srv_conn->addr.to)->sin_addr = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
1007 } else if (cli_conn->addr.to.ss_family == AF_INET6) {
1008 ((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 +02001009 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +02001010 }
1011
Willy Tarreaubaaee002006-06-26 02:48:02 +02001012 /* if this server remaps proxied ports, we'll use
1013 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +02001014 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +01001015 int base_port;
1016
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001017 conn_get_to_addr(cli_conn);
David du Colombier6f5ccb12011-03-10 22:26:24 +01001018
1019 /* First, retrieve the port from the incoming connection */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001020 base_port = get_host_port(&cli_conn->addr.to);
David du Colombier6f5ccb12011-03-10 22:26:24 +01001021
1022 /* Second, assign the outgoing connection's port */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001023 base_port += get_host_port(&srv_conn->addr.to);
1024 set_host_port(&srv_conn->addr.to, base_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001025 }
1026 }
Willy Tarreau1620ec32011-08-06 17:05:02 +02001027 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +02001028 /* connect to the defined dispatch addr */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001029 srv_conn->addr.to = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001030 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001031 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +02001032 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001033 conn_get_to_addr(cli_conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001034
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001035 if (cli_conn->addr.to.ss_family == AF_INET || cli_conn->addr.to.ss_family == AF_INET6)
1036 srv_conn->addr.to = cli_conn->addr.to;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001037 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +01001038 else if (s->be->options & PR_O_HTTP_PROXY) {
1039 /* If HTTP PROXY option is set, then server is already assigned
1040 * during incoming client request parsing. */
1041 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +01001042 else {
1043 /* no server and no LB algorithm ! */
1044 return SRV_STATUS_INTERNAL;
1045 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001046
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001047 /* Copy network namespace from client connection */
Thierry FOURNIERfe1ebcd2014-12-19 13:37:11 +01001048 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001049
Willy Tarreaue7dff022015-04-03 01:14:29 +02001050 s->flags |= SF_ADDR_SET;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001051 return SRV_STATUS_OK;
1052}
1053
Willy Tarreau87b09662015-04-03 00:22:06 +02001054/* This function assigns a server to stream <s> if required, and can add the
Willy Tarreaubaaee002006-06-26 02:48:02 +02001055 * connection to either the assigned server's queue or to the proxy's queue.
Willy Tarreau87b09662015-04-03 00:22:06 +02001056 * If ->srv_conn is set, the stream is first released from the server.
Willy Tarreaue7dff022015-04-03 01:14:29 +02001057 * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will
Willy Tarreau7c669d72008-06-20 15:04:11 +02001058 * be called before any connection and after any retry or redispatch occurs.
1059 *
Willy Tarreau87b09662015-04-03 00:22:06 +02001060 * It is not allowed to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001061 *
1062 * Returns :
1063 *
1064 * SRV_STATUS_OK if everything is OK.
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001065 * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001066 * SRV_STATUS_QUEUED if the connection has been queued.
1067 * SRV_STATUS_FULL if the server(s) is/are saturated and the
Willy Tarreau827aee92011-03-10 16:55:02 +01001068 * connection could not be queued at the server's,
Willy Tarreau7c669d72008-06-20 15:04:11 +02001069 * which may be NULL if we queue on the backend.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001070 * SRV_STATUS_INTERNAL for other unrecoverable errors.
1071 *
1072 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001073int assign_server_and_queue(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001074{
1075 struct pendconn *p;
Willy Tarreau827aee92011-03-10 16:55:02 +01001076 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001077 int err;
1078
1079 if (s->pend_pos)
1080 return SRV_STATUS_INTERNAL;
1081
Willy Tarreau7c669d72008-06-20 15:04:11 +02001082 err = SRV_STATUS_OK;
Willy Tarreaue7dff022015-04-03 01:14:29 +02001083 if (!(s->flags & SF_ASSIGNED)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001084 struct server *prev_srv = objt_server(s->target);
Willy Tarreau3d80d912011-03-10 11:42:13 +01001085
Willy Tarreau7c669d72008-06-20 15:04:11 +02001086 err = assign_server(s);
Willy Tarreau3d80d912011-03-10 11:42:13 +01001087 if (prev_srv) {
Willy Tarreau87b09662015-04-03 00:22:06 +02001088 /* This stream was previously assigned to a server. We have to
1089 * update the stream's and the server's stats :
Willy Tarreau7c669d72008-06-20 15:04:11 +02001090 * - if the server changed :
1091 * - set TX_CK_DOWN if txn.flags was TX_CK_VALID
Willy Tarreaue7dff022015-04-03 01:14:29 +02001092 * - set SF_REDISP if it was successfully redispatched
Willy Tarreau7c669d72008-06-20 15:04:11 +02001093 * - increment srv->redispatches and be->redispatches
1094 * - if the server remained the same : update retries.
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001095 */
1096
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001097 if (prev_srv != objt_server(s->target)) {
Willy Tarreaueee5b512015-04-03 23:46:31 +02001098 if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) {
1099 s->txn->flags &= ~TX_CK_MASK;
1100 s->txn->flags |= TX_CK_DOWN;
Willy Tarreau7c669d72008-06-20 15:04:11 +02001101 }
Willy Tarreaue7dff022015-04-03 01:14:29 +02001102 s->flags |= SF_REDISP;
Olivier Houchard237f7812019-03-08 18:49:07 +01001103 _HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
1104 _HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001105 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +01001106 _HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
1107 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001108 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001109 }
1110 }
1111
Willy Tarreaubaaee002006-06-26 02:48:02 +02001112 switch (err) {
1113 case SRV_STATUS_OK:
Willy Tarreaue7dff022015-04-03 01:14:29 +02001114 /* we have SF_ASSIGNED set */
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001115 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001116 if (!srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001117 return SRV_STATUS_OK; /* dispatch or proxy mode */
1118
1119 /* If we already have a connection slot, no need to check any queue */
Willy Tarreau827aee92011-03-10 16:55:02 +01001120 if (s->srv_conn == srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001121 return SRV_STATUS_OK;
1122
Willy Tarreau87b09662015-04-03 00:22:06 +02001123 /* OK, this stream already has an assigned server, but no
Willy Tarreau7c669d72008-06-20 15:04:11 +02001124 * connection slot yet. Either it is a redispatch, or it was
1125 * assigned from persistence information (direct mode).
1126 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001127 if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) {
Willy Tarreau7c669d72008-06-20 15:04:11 +02001128 /* server scheduled for redirection, and already assigned. We
1129 * don't want to go further nor check the queue.
Willy Tarreau21d2af32008-02-14 20:25:24 +01001130 */
Willy Tarreau827aee92011-03-10 16:55:02 +01001131 sess_change_server(s, srv); /* not really needed in fact */
Willy Tarreau21d2af32008-02-14 20:25:24 +01001132 return SRV_STATUS_OK;
1133 }
1134
Willy Tarreau87b09662015-04-03 00:22:06 +02001135 /* We might have to queue this stream if the assigned server is full.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001136 * We know we have to queue it into the server's queue, so if a maxqueue
1137 * is set on the server, we must also check that the server's queue is
1138 * not full, in which case we have to return FULL.
1139 */
Willy Tarreau827aee92011-03-10 16:55:02 +01001140 if (srv->maxconn &&
1141 (srv->nbpend || srv->served >= srv_dynamic_maxconn(srv))) {
Willy Tarreau7c669d72008-06-20 15:04:11 +02001142
Willy Tarreau827aee92011-03-10 16:55:02 +01001143 if (srv->maxqueue > 0 && srv->nbpend >= srv->maxqueue)
Willy Tarreau7c669d72008-06-20 15:04:11 +02001144 return SRV_STATUS_FULL;
1145
Willy Tarreaubaaee002006-06-26 02:48:02 +02001146 p = pendconn_add(s);
1147 if (p)
1148 return SRV_STATUS_QUEUED;
1149 else
Willy Tarreau7c669d72008-06-20 15:04:11 +02001150 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001151 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001152
1153 /* OK, we can use this server. Let's reserve our place */
Willy Tarreau827aee92011-03-10 16:55:02 +01001154 sess_change_server(s, srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001155 return SRV_STATUS_OK;
1156
1157 case SRV_STATUS_FULL:
Willy Tarreau87b09662015-04-03 00:22:06 +02001158 /* queue this stream into the proxy's queue */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001159 p = pendconn_add(s);
1160 if (p)
1161 return SRV_STATUS_QUEUED;
1162 else
Willy Tarreau7c669d72008-06-20 15:04:11 +02001163 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001164
1165 case SRV_STATUS_NOSRV:
Willy Tarreau7c669d72008-06-20 15:04:11 +02001166 return err;
1167
Willy Tarreaubaaee002006-06-26 02:48:02 +02001168 case SRV_STATUS_INTERNAL:
1169 return err;
Willy Tarreau7c669d72008-06-20 15:04:11 +02001170
Willy Tarreaubaaee002006-06-26 02:48:02 +02001171 default:
1172 return SRV_STATUS_INTERNAL;
1173 }
Willy Tarreau5b6995c2008-01-13 16:31:17 +01001174}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001175
Willy Tarreaub1d67742010-03-29 19:36:59 +02001176/* If an explicit source binding is specified on the server and/or backend, and
1177 * this source makes use of the transparent proxy, then it is extracted now and
Willy Tarreau87b09662015-04-03 00:22:06 +02001178 * assigned to the stream's pending connection. This function assumes that an
Willy Tarreau350f4872014-11-28 14:42:25 +01001179 * outgoing connection has already been assigned to s->si[1].end.
Willy Tarreaub1d67742010-03-29 19:36:59 +02001180 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001181static void assign_tproxy_address(struct stream *s)
Willy Tarreaub1d67742010-03-29 19:36:59 +02001182{
Willy Tarreau29fbe512015-08-20 19:35:14 +02001183#if defined(CONFIG_HAP_TRANSPARENT)
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001184 struct server *srv = objt_server(s->target);
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001185 struct conn_src *src;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001186 struct connection *cli_conn;
Olivier Houchard09a0f032019-01-17 15:59:13 +01001187 struct connection *srv_conn;
1188
1189 if (objt_cs(s->si[1].end))
1190 srv_conn = cs_conn(__objt_cs(s->si[1].end));
1191 else
1192 srv_conn = objt_conn(s->si[1].end);
Willy Tarreau827aee92011-03-10 16:55:02 +01001193
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001194 if (srv && srv->conn_src.opts & CO_SRC_BIND)
1195 src = &srv->conn_src;
1196 else if (s->be->conn_src.opts & CO_SRC_BIND)
1197 src = &s->be->conn_src;
1198 else
1199 return;
Willy Tarreau294c4732011-12-16 21:35:50 +01001200
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001201 switch (src->opts & CO_SRC_TPROXY_MASK) {
1202 case CO_SRC_TPROXY_ADDR:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001203 srv_conn->addr.from = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001204 break;
1205 case CO_SRC_TPROXY_CLI:
1206 case CO_SRC_TPROXY_CIP:
1207 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001208 cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001209 if (cli_conn)
1210 srv_conn->addr.from = cli_conn->addr.from;
1211 else
1212 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001213 break;
1214 case CO_SRC_TPROXY_DYN:
Willy Tarreaueee5b512015-04-03 23:46:31 +02001215 if (src->bind_hdr_occ && s->txn) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001216 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001217 size_t vlen;
Willy Tarreau294c4732011-12-16 21:35:50 +01001218
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001219 /* bind to the IP in a header */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001220 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_family = AF_INET;
1221 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_port = 0;
1222 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr = 0;
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001223 if (!IS_HTX_STRM(s)) {
1224 int rewind;
Willy Tarreau294c4732011-12-16 21:35:50 +01001225
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001226 c_rew(&s->req, rewind = http_hdr_rewind(&s->txn->req));
1227 if (http_get_hdr(&s->txn->req, src->bind_hdr_name, src->bind_hdr_len,
1228 &s->txn->hdr_idx, src->bind_hdr_occ, NULL, &vptr, &vlen)) {
1229 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
1230 htonl(inetaddr_host_lim(vptr, vptr + vlen));
1231 }
1232 c_adv(&s->req, rewind);
1233 }
1234 else {
1235 if (http_get_htx_hdr(htxbuf(&s->req.buf),
1236 ist2(src->bind_hdr_name, src->bind_hdr_len),
1237 src->bind_hdr_occ, NULL, &vptr, &vlen)) {
1238 ((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
1239 htonl(inetaddr_host_lim(vptr, vptr + vlen));
1240 }
Willy Tarreaubce70882009-09-07 11:51:47 +02001241 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001242 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001243 break;
1244 default:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001245 memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
Willy Tarreaub1d67742010-03-29 19:36:59 +02001246 }
1247#endif
1248}
1249
Lukas Tribusda95fd92018-11-25 13:21:27 +01001250#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001251/*
1252 * Pick the right mux once the connection is established, we should now have
Willy Tarreau94031d32018-12-19 14:36:29 +01001253 * an alpn if available, so we are now able to choose. In this specific case
1254 * the connection's context is &si[i].end.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001255 */
1256static int conn_complete_server(struct connection *conn)
1257{
1258 struct conn_stream *cs = NULL;
Willy Tarreau94031d32018-12-19 14:36:29 +01001259 struct stream *s = container_of(conn->ctx, struct stream, si[1].end);
Olivier Houchardbf024f02018-11-29 17:08:53 +01001260 struct server *srv;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001261
Olivier Houchard70d9b2f2018-11-29 16:57:32 +01001262 task_wakeup(s->task, TASK_WOKEN_IO);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001263 conn_clear_xprt_done_cb(conn);
1264 /* Verify if the connection just established. */
1265 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED))))
1266 conn->flags |= CO_FL_CONNECTED;
1267
Olivier Houchard201b9f42018-11-21 00:16:29 +01001268 if (conn->flags & CO_FL_ERROR)
1269 goto fail;
Olivier Houchardd76bd2d2018-11-29 16:58:49 +01001270 si_detach_endpoint(&s->si[1]);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001271 cs = si_alloc_cs(&s->si[1], conn);
1272 if (!cs)
1273 goto fail;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001274 if (conn_install_mux_be(conn, cs, s->sess) < 0)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001275 goto fail;
Olivier Houchardbf024f02018-11-29 17:08:53 +01001276 srv = objt_server(s->target);
Olivier Houchard7aec9ed2018-12-14 19:31:51 +01001277 if (srv && ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
Olivier Houchardbf024f02018-11-29 17:08:53 +01001278 conn->mux->avail_streams(conn) > 0)
1279 LIST_ADD(&srv->idle_conns[tid], &conn->list);
1280
Olivier Houchard201b9f42018-11-21 00:16:29 +01001281 return 0;
1282
1283fail:
Willy Tarreaud8220132019-01-28 16:33:35 +01001284 si_detach_endpoint(&s->si[1]);
1285
Olivier Houchard201b9f42018-11-21 00:16:29 +01001286 if (cs)
1287 cs_free(cs);
1288 /* kill the connection now */
1289 conn_stop_tracking(conn);
1290 conn_full_close(conn);
1291 conn_free(conn);
Olivier Houchard4f417512018-12-27 18:59:46 +01001292 /* Let process_stream know it went wrong */
1293 s->si[1].flags |= SI_FL_ERR;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001294 return -1;
1295}
Olivier Houchardc6e0bb42018-11-23 14:24:10 +01001296#endif
Olivier Houchard201b9f42018-11-21 00:16:29 +01001297
Willy Tarreaub1d67742010-03-29 19:36:59 +02001298
Willy Tarreaubaaee002006-06-26 02:48:02 +02001299/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001300 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001301 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001302 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001303 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001304 * - SF_ERR_NONE if everything's OK
1305 * - SF_ERR_SRVTO if there are no more servers
1306 * - SF_ERR_SRVCL if the connection was refused by the server
1307 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1308 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1309 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001310 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001311 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001312 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001313 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001314int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001315{
Olivier Houchard522eea72017-11-03 16:27:47 +01001316 struct connection *cli_conn = NULL;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001317 struct connection *srv_conn = NULL;
1318 struct connection *old_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001319 struct conn_stream *srv_cs = NULL;
Willy Tarreau827aee92011-03-10 16:55:02 +01001320 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001321 int reuse = 0;
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001322 int reuse_orphan = 0;
Olivier Houchard5cd62172019-01-04 15:52:26 +01001323 int init_mux = 0;
Olivier Houchard4dc85532019-01-29 15:50:38 +01001324 int alloced_cs = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001325 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001326
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001327
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001328 /* Some, such as http_proxy and the LUA, create their connection and
1329 * conn_stream manually, so if we already have a conn_stream, try
1330 * to use it.
1331 */
1332 srv_cs = objt_cs(s->si[1].end);
Olivier Houchard9ef51552019-01-28 15:33:15 +01001333 if (!srv_cs)
1334 srv_conn = objt_conn(s->si[1].end);
1335 else
1336 srv_conn = cs_conn(srv_cs);
1337
1338 if (srv_conn) {
1339 if (!srv_conn->target || srv_conn->target == s->target) {
1340 srv_conn->flags &= ~(CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH);
1341 if (srv_cs)
Willy Tarreau7bb39d72019-06-03 14:23:33 +02001342 srv_cs->flags &= ~(CS_FL_ERROR | CS_FL_EOS);
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001343 reuse = 1;
Olivier Houchard9ef51552019-01-28 15:33:15 +01001344 old_conn = srv_conn;
1345 } else {
1346 srv_conn = NULL;
Olivier Houcharda9da4672019-07-08 16:30:32 +02001347 srv_cs = NULL;
Olivier Houchard9ef51552019-01-28 15:33:15 +01001348 si_release_endpoint(&s->si[1]);
Olivier Houchardac1ce6f2018-12-08 19:08:48 +01001349 }
Olivier Houchard9ef51552019-01-28 15:33:15 +01001350 }
1351
1352 if (!old_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001353 struct sess_srv_list *srv_list;
1354 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
1355 if (srv_list->target == s->target) {
1356 list_for_each_entry(srv_conn, &srv_list->conn_list,
Olivier Houchard2442f682018-12-01 17:03:38 +01001357 session_list) {
1358 if (conn_xprt_ready(srv_conn) &&
1359 srv_conn->mux && (srv_conn->mux->avail_streams(srv_conn) > 0)) {
1360 reuse = 1;
1361 break;
1362 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001363 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001364 break;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001365 }
1366 }
Olivier Houchardc3fa6382018-12-27 15:29:53 +01001367 if (reuse == 0) {
1368 srv_conn = NULL;
Olivier Houchard351411f2018-12-27 17:20:54 +01001369 if (!LIST_ISEMPTY(&s->sess->srv_list)) {
1370 srv_list = LIST_ELEM(s->sess->srv_list.n,
1371 struct sess_srv_list *, srv_list);
1372 if (!LIST_ISEMPTY(&srv_list->conn_list))
1373 srv_conn = LIST_ELEM(srv_list->conn_list.n,
1374 struct connection *, session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001375 }
Olivier Houchard351411f2018-12-27 17:20:54 +01001376
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001377 }
1378 }
1379 old_conn = srv_conn;
1380
Willy Tarreau7b004922015-08-04 19:34:21 +02001381 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001382
Willy Tarreau8dff9982015-08-04 20:45:52 +02001383 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001384 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001385
Willy Tarreau449d74a2015-08-05 17:16:33 +02001386 /* Below we pick connections from the safe or idle lists based
1387 * on the strategy, the fact that this is a first or second
1388 * (retryable) request, with the indicated priority (1 or 2) :
1389 *
1390 * SAFE AGGR ALWS
1391 *
1392 * +-----+-----+ +-----+-----+ +-----+-----+
1393 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1394 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1395 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1396 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1397 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1398 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1399 */
Christopher Faulet40a007c2017-07-03 15:41:01 +02001400 if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001401 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1402 s->txn && (s->txn->flags & TX_NOT_FIRST))) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001403 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001404 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001405 else if (srv->safe_conns && !LIST_ISEMPTY(&srv->safe_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001406 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1407 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR)) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001408 srv_conn = LIST_ELEM(srv->safe_conns[tid].n, struct connection *, list);
Willy Tarreau449d74a2015-08-05 17:16:33 +02001409 }
Christopher Faulet40a007c2017-07-03 15:41:01 +02001410 else if (srv->idle_conns && !LIST_ISEMPTY(&srv->idle_conns[tid]) &&
Willy Tarreau449d74a2015-08-05 17:16:33 +02001411 (s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) {
Christopher Faulet40a007c2017-07-03 15:41:01 +02001412 srv_conn = LIST_ELEM(srv->idle_conns[tid].n, struct connection *, list);
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001413 } else if (srv->idle_orphan_conns && !LIST_ISEMPTY(&srv->idle_orphan_conns[tid]) &&
1414 (((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) ||
1415 (((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) &&
1416 s->txn && (s->txn->flags & TX_NOT_FIRST)))) {
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001417 srv_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
Willy Tarreauc912f942019-02-28 16:06:56 +01001418 struct connection *, list);
1419 if (srv_conn)
Olivier Houchard7f1bc312019-01-22 16:11:03 +01001420 reuse_orphan = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001421 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001422
Willy Tarreau449d74a2015-08-05 17:16:33 +02001423 /* If we've picked a connection from the pool, we now have to
1424 * detach it. We may have to get rid of the previous idle
1425 * connection we had, so for this we try to swap it with the
1426 * other owner's. That way it may remain alive for others to
1427 * pick.
1428 */
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001429 if (srv_conn)
Willy Tarreau8dff9982015-08-04 20:45:52 +02001430 reuse = 1;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001431 }
1432
Willy Tarreau34601a82013-12-15 16:33:46 +01001433 if (reuse) {
1434 /* Disable connection reuse if a dynamic source is used.
1435 * As long as we don't share connections between servers,
1436 * we don't need to disable connection reuse on no-idempotent
1437 * requests nor when PROXY protocol is used.
1438 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001439 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1440 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1441 reuse = 0;
1442 }
1443 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1444 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1445 reuse = 0;
1446 }
1447 }
Olivier Houchard14fcc2e2019-06-05 13:55:01 +02001448 if (((!reuse || (srv_conn && !(srv_conn->flags & CO_FL_CONNECTED)))
Christopher Faulet88e47652019-09-13 10:01:36 +02001449 && ha_used_fds > global.tune.pool_high_count) && srv && srv->idle_orphan_conns) {
Olivier Houchard88698d92019-04-16 19:07:22 +02001450 struct connection *tokill_conn;
1451
1452 /* We can't reuse a connection, and e have more FDs than deemd
1453 * acceptable, attempt to kill an idling connection
1454 */
1455 /* First, try from our own idle list */
1456 tokill_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[tid],
1457 struct connection *, list);
1458 if (tokill_conn)
1459 tokill_conn->mux->destroy(tokill_conn->ctx);
1460 /* If not, iterate over other thread's idling pool, and try to grab one */
1461 else {
1462 int i;
1463
1464 for (i = 0; i < global.nbthread; i++) {
1465 if (i == tid)
1466 continue;
Willy Tarreau08e2b412019-05-26 11:50:08 +02001467
1468 // just silence stupid gcc which reports an absurd
1469 // out-of-bounds warning for <i> which is always
1470 // exactly zero without threads, but it seems to
1471 // see it possibly larger.
1472 ALREADY_CHECKED(i);
1473
Olivier Houchard7fcbd372019-12-30 18:15:40 +01001474 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
Olivier Houchard88698d92019-04-16 19:07:22 +02001475 tokill_conn = LIST_POP_LOCKED(&srv->idle_orphan_conns[i],
1476 struct connection *, list);
1477 if (tokill_conn) {
1478 /* We got one, put it into the concerned thread's to kill list, and wake it's kill task */
1479
1480 LIST_ADDQ_LOCKED(&toremove_connections[i],
1481 &tokill_conn->list);
1482 task_wakeup(idle_conn_cleanup[i], TASK_WOKEN_OTHER);
Olivier Houchardf77ca892020-01-31 17:22:08 +01001483 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
Olivier Houchard88698d92019-04-16 19:07:22 +02001484 break;
1485 }
Olivier Houchard7fcbd372019-12-30 18:15:40 +01001486 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
Olivier Houchard88698d92019-04-16 19:07:22 +02001487 }
1488 }
1489
1490 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001491 /* If we're really reusing the connection, remove it from the orphan
1492 * list and add it back to the idle list.
1493 */
Christopher Faulet46451d62019-04-19 15:39:22 +02001494 if (reuse) {
1495 if (reuse_orphan) {
1496 srv_conn->idle_time = 0;
1497 _HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
1498 __ha_barrier_atomic_store();
1499 srv->curr_idle_thr[tid]--;
1500 LIST_ADDQ(&srv->idle_conns[tid], &srv_conn->list);
1501 }
1502 else {
1503 if (srv_conn->flags & CO_FL_SESS_IDLE) {
1504 struct session *sess = srv_conn->owner;
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001505
Christopher Faulet46451d62019-04-19 15:39:22 +02001506 srv_conn->flags &= ~CO_FL_SESS_IDLE;
1507 sess->idle_conns--;
1508 }
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001509 }
Olivier Houchard0c18a6f2018-12-02 14:11:41 +01001510 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001511
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001512 /* We're about to use another connection, let the mux know we're
1513 * done with this one
1514 */
Olivier Houchardc685d702018-12-28 16:20:25 +01001515 if (old_conn != srv_conn && old_conn && reuse && !reuse_orphan) {
1516 struct session *sess = srv_conn->owner;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001517
Olivier Houchardc685d702018-12-28 16:20:25 +01001518 if (sess) {
1519 if (old_conn && !(old_conn->flags & CO_FL_PRIVATE) &&
1520 old_conn->mux != NULL) {
Olivier Houcharda2dbeb22018-12-28 18:50:57 +01001521 if (old_conn->flags & CO_FL_SESS_IDLE)
1522 s->sess->idle_conns--;
Olivier Houchardc685d702018-12-28 16:20:25 +01001523 session_unown_conn(s->sess, old_conn);
1524 old_conn->owner = sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001525 if (!session_add_conn(sess, old_conn, old_conn->target)) {
Olivier Houcharda48237f2019-05-02 12:04:15 +02001526 old_conn->flags &= ~CO_FL_SESS_IDLE;
Olivier Houchardc685d702018-12-28 16:20:25 +01001527 old_conn->owner = NULL;
Christopher Faulet73c12072019-04-08 11:23:22 +02001528 old_conn->mux->destroy(old_conn->ctx);
Olivier Houchardc685d702018-12-28 16:20:25 +01001529 } else
1530 session_check_idle_conn(sess, old_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001531 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001532 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001533 }
1534
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001535 if (reuse) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001536 /* We already created a cs earlier when using http_proxy, so
1537 * only create a new one if we don't have one already.
1538 */
Olivier Houchard9ef51552019-01-28 15:33:15 +01001539 if (!srv_cs && srv_conn->mux) {
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001540 int avail = srv_conn->mux->avail_streams(srv_conn);
1541
1542 if (avail <= 1) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001543 /* No more streams available, remove it from the list */
1544 LIST_DEL(&srv_conn->list);
1545 LIST_INIT(&srv_conn->list);
1546 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001547
1548 if (avail >= 1) {
1549 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001550 if (srv_cs) {
1551 alloced_cs = 1;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001552 si_attach_cs(&s->si[1], srv_cs);
Olivier Houchard4dc85532019-01-29 15:50:38 +01001553 } else
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001554 srv_conn = NULL;
1555 }
Olivier Houchard134a2042018-12-28 14:45:47 +01001556 else
1557 srv_conn = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001558 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001559 /* otherwise srv_conn is left intact */
1560 }
1561 else
1562 srv_conn = NULL;
1563
1564 /* no reuse or failed to reuse the connection above, pick a new one */
1565 if (!srv_conn) {
Christopher Faulete8d24232020-07-07 22:25:19 +02001566 s->flags &= ~SF_ADDR_SET;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001567 srv_conn = conn_new();
Willy Tarreau1da41ec2019-02-01 16:38:48 +01001568 if (srv_conn)
1569 srv_conn->target = s->target;
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001570 srv_cs = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001571 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001572
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001573 if (srv_conn && old_conn != srv_conn) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001574 if (srv_conn->owner)
1575 session_unown_conn(srv_conn->owner, srv_conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001576 srv_conn->owner = s->sess;
Willy Tarreau3c4e19f2019-02-01 11:54:23 +01001577 if (!session_add_conn(s->sess, srv_conn, srv_conn->target)) {
Olivier Houchard351411f2018-12-27 17:20:54 +01001578 /* If we failed to attach the connection, detach the
1579 * conn_stream, possibly destroying the connection */
Olivier Houchard4dc85532019-01-29 15:50:38 +01001580 if (alloced_cs)
1581 si_release_endpoint(&s->si[1]);
Olivier Houchard351411f2018-12-27 17:20:54 +01001582 srv_conn->owner = NULL;
Olivier Houchard26da3232019-01-29 16:05:02 +01001583 if (srv_conn->mux && !srv_add_to_idle_list(objt_server(srv_conn->target), srv_conn))
Olivier Houchard351411f2018-12-27 17:20:54 +01001584 /* The server doesn't want it, let's kill the connection right away */
Christopher Faulet73c12072019-04-08 11:23:22 +02001585 srv_conn->mux->destroy(srv_conn->ctx);
Olivier Houchard351411f2018-12-27 17:20:54 +01001586 srv_conn = NULL;
1587
1588 }
Willy Tarreau323a2d92015-08-04 19:00:17 +02001589 }
Willy Tarreauc12b5e62015-08-04 19:45:36 +02001590
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001591 if (!srv_conn) {
1592 if (srv_conn)
1593 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001594 return SF_ERR_RESOURCE;
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001595 }
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001596
Willy Tarreaue7dff022015-04-03 01:14:29 +02001597 if (!(s->flags & SF_ADDR_SET)) {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001598 err = assign_server_address(s, srv_conn);
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001599 if (err != SRV_STATUS_OK) {
1600 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001601 return SF_ERR_INTERNAL;
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001602 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001603 }
1604
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001605 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreauff605db2013-12-20 11:09:51 +01001606 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001607 if (srv)
Willy Tarreau7b004922015-08-04 19:34:21 +02001608 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001609 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1610 /* proxies exclusively run on raw_sock right now */
Willy Tarreaua261e9b2016-12-22 20:44:00 +01001611 conn_prepare(srv_conn, protocol_by_family(srv_conn->addr.to.ss_family), xprt_get(XPRT_RAW));
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001612 if (!(srv_conn->ctrl)) {
1613 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001614 return SF_ERR_INTERNAL;
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001615 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001616 }
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001617 else {
1618 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001619 return SF_ERR_INTERNAL; /* how did we get there ? */
Olivier Houchardc73eaba2020-03-20 14:26:32 +01001620 }
Willy Tarreaud02394b2012-05-11 18:32:18 +02001621
Lukas Tribusda95fd92018-11-25 13:21:27 +01001622#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001623 if (!srv ||
Christopher Faulet6bd4ee12020-07-30 09:10:36 +02001624 (srv->use_ssl != 1 || (!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
1625 srv->mux_proto || s->be->mode != PR_MODE_HTTP))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001626#endif
1627 {
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001628 srv_cs = objt_cs(s->si[1].end);
1629 if (!srv_cs || srv_cs->conn != srv_conn)
1630 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
Olivier Houchard201b9f42018-11-21 00:16:29 +01001631 if (!srv_cs) {
1632 conn_free(srv_conn);
1633 return SF_ERR_RESOURCE;
1634 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001635 init_mux = 1;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001636 }
Lukas Tribusda95fd92018-11-25 13:21:27 +01001637#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard201b9f42018-11-21 00:16:29 +01001638 else {
Willy Tarreau94031d32018-12-19 14:36:29 +01001639 srv_conn->ctx = &s->si[1].end;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001640 /* Store the connection into the stream interface,
1641 * while we still don't have a mux, so that if the
1642 * stream is destroyed before the connection is
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001643 * established, we have a chance to destroy it even
1644 * if it is no longer referenced in the session.
Olivier Houchard201b9f42018-11-21 00:16:29 +01001645 */
Olivier Houchardee23b2a2018-11-23 17:07:04 +01001646 s->si[1].end = &srv_conn->obj_type;
Olivier Houchard201b9f42018-11-21 00:16:29 +01001647 conn_set_xprt_done_cb(srv_conn, conn_complete_server);
1648 }
1649
1650#endif
1651
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001652
Willy Tarreauff605db2013-12-20 11:09:51 +01001653 /* process the case where the server requires the PROXY protocol to be sent */
1654 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001655 cli_conn = objt_conn(strm_orig(s));
1656
Willy Tarreau7b004922015-08-04 19:34:21 +02001657 if (srv && srv->pp_opts) {
Willy Tarreau387ebf82015-08-04 19:24:13 +02001658 srv_conn->flags |= CO_FL_PRIVATE;
Alexander Liu2a54bb72019-05-22 19:44:48 +08001659 srv_conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreauff605db2013-12-20 11:09:51 +01001660 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001661 if (cli_conn)
1662 conn_get_to_addr(cli_conn);
1663 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001664
Willy Tarreauff605db2013-12-20 11:09:51 +01001665 assign_tproxy_address(s);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001666
1667 if (srv && (srv->flags & SRV_F_SOCKS4_PROXY)) {
1668 srv_conn->send_proxy_ofs = 1;
1669 srv_conn->flags |= CO_FL_SOCKS4;
1670 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001671 }
Willy Tarreau926c4fc2020-05-07 17:46:56 +02001672 else if (!srv_conn->mux) {
1673 /* No mux? We possibly asked for ALPN during a first failed
1674 * attempt and are trying to start again from this connection,
1675 * thus we have nothing to do.
1676 */
1677 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001678 else if (!conn_xprt_ready(srv_conn)) {
1679 if (srv_conn->mux->reset)
1680 srv_conn->mux->reset(srv_conn);
1681 }
Olivier Houchard36deb212019-10-25 17:00:54 +02001682 else {
1683 /* Only consider we're doing reuse if the connection was
1684 * ready.
1685 */
1686 if (srv_conn->mux->ctl(srv_conn, MUX_STATUS, NULL) & MUX_STATUS_READY)
1687 s->flags |= SF_SRV_REUSED;
1688 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001689
William Lallemandb7ff6a32012-03-02 14:35:21 +01001690 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001691 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001692 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001693
Willy Tarreau14f8e862012-08-30 22:23:13 +02001694 /* disable lingering */
1695 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001696 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001697
Willy Tarreauf1573842018-12-14 11:35:36 +01001698 if (s->flags & SF_SRV_REUSED) {
Olivier Houchard237f7812019-03-08 18:49:07 +01001699 _HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001700 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001701 _HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001702 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +01001703 _HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001704 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001705 _HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001706 }
1707
Olivier Houchard201b9f42018-11-21 00:16:29 +01001708 err = si_connect(&s->si[1], srv_conn);
Willy Tarreaud9b35d92019-07-18 16:18:20 +02001709 if (err != SF_ERR_NONE)
1710 return err;
1711
Olivier Houchard5cd62172019-01-04 15:52:26 +01001712 /* We have to defer the mux initialization until after si_connect()
1713 * has been called, as we need the xprt to have been properly
1714 * initialized, or any attempt to recv during the mux init may
1715 * fail, and flag the connection as CO_FL_ERROR.
1716 */
1717 if (init_mux) {
Olivier Houchard74931142019-01-29 19:11:16 +01001718 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0) {
1719 conn_full_close(srv_conn);
Olivier Houchard5cd62172019-01-04 15:52:26 +01001720 return SF_ERR_INTERNAL;
Olivier Houchard74931142019-01-29 19:11:16 +01001721 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001722 /* If we're doing http-reuse always, and the connection
1723 * is an http2 connection, add it to the available list,
1724 * so that others can use it right away.
1725 */
1726 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1727 srv_conn->mux->avail_streams(srv_conn) > 0)
1728 LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
1729 }
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001730 /* The CO_FL_SEND_PROXY flag may have been set by the connect method,
1731 * if so, add our handshake pseudo-XPRT now.
1732 */
Olivier Houchardfc4c35a2019-06-24 18:19:40 +02001733 if ((srv_conn->flags & CO_FL_HANDSHAKE_NOSSL)) {
Olivier Houchardfe50bfb2019-05-27 12:09:19 +02001734 if (xprt_add_hs(srv_conn) < 0) {
1735 conn_full_close(srv_conn);
1736 return SF_ERR_INTERNAL;
1737 }
1738 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001739
Willy Tarreaubaaee002006-06-26 02:48:02 +02001740
Willy Tarreau5db847a2019-05-09 14:13:35 +02001741#if USE_OPENSSL && (defined(OPENSSL_IS_BORINGSSL) || (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L))
Olivier Houchard4cd2af42019-05-06 15:18:27 +02001742
Olivier Houchard8694e5b2019-06-15 00:14:05 +02001743 if (!reuse && cli_conn && srv && srv_conn->mux &&
Olivier Houchard522eea72017-11-03 16:27:47 +01001744 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001745 /* Only attempt to use early data if either the client sent
1746 * early data, so that we know it can handle a 425, or if
1747 * we are allwoed to retry requests on early data failure, and
1748 * it's our first try
1749 */
1750 ((cli_conn->flags & CO_FL_EARLY_DATA) ||
1751 ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
1752 s->si[1].conn_retries == s->be->conn_retries)) &&
1753 !channel_is_empty(si_oc(&s->si[1])) &&
1754 srv_conn->flags & CO_FL_SSL_WAIT_HS)
Olivier Houchard522eea72017-11-03 16:27:47 +01001755 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001756#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001757
Willy Tarreau14f8e862012-08-30 22:23:13 +02001758 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001759 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001760
Willy Tarreau827aee92011-03-10 16:55:02 +01001761 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001762 int count;
1763
Willy Tarreaue7dff022015-04-03 01:14:29 +02001764 s->flags |= SF_CURR_SESS;
Olivier Houchard237f7812019-03-08 18:49:07 +01001765 count = _HA_ATOMIC_ADD(&srv->cur_sess, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +02001766 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001767 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001768 s->be->lbprm.server_take_conn(srv);
Willy Tarreau732eac42015-07-09 11:40:25 +02001769
1770#ifdef USE_OPENSSL
1771 if (srv->ssl_ctx.sni) {
1772 struct sample *smp;
1773 int rewind;
1774
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001775 if (!IS_HTX_STRM(s)) {
1776 /* Tricky case : we have already scheduled the pending
1777 * HTTP request or TCP data for leaving. So in HTTP we
1778 * rewind exactly the headers, otherwise we rewind the
1779 * output data.
1780 */
1781 rewind = s->txn ? http_hdr_rewind(&s->txn->req) : co_data(&s->req);
1782 c_rew(&s->req, rewind);
1783
1784 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1785 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau732eac42015-07-09 11:40:25 +02001786
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001787 /* restore the pointers */
1788 c_adv(&s->req, rewind);
1789 }
1790 else {
1791 /* rewind the output data. */
1792 rewind = co_data(&s->req);
1793 c_rew(&s->req, rewind);
1794
1795 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1796 srv->ssl_ctx.sni, SMP_T_STR);
Willy Tarreau732eac42015-07-09 11:40:25 +02001797
Christopher Fauletf7679ad2019-02-04 12:02:18 +01001798 /* restore the pointers */
1799 c_adv(&s->req, rewind);
1800 }
Willy Tarreau732eac42015-07-09 11:40:25 +02001801
Willy Tarreau2e0565c2016-08-09 11:55:21 +02001802 if (smp_make_safe(smp)) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001803 ssl_sock_set_servername(srv_conn,
1804 smp->data.u.str.area);
Willy Tarreau387ebf82015-08-04 19:24:13 +02001805 srv_conn->flags |= CO_FL_PRIVATE;
Willy Tarreau732eac42015-07-09 11:40:25 +02001806 }
1807 }
1808#endif /* USE_OPENSSL */
1809
Willy Tarreaubaaee002006-06-26 02:48:02 +02001810 }
1811
Willy Tarreaue7dff022015-04-03 01:14:29 +02001812 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001813}
1814
1815
Willy Tarreaubaaee002006-06-26 02:48:02 +02001816/* This function performs the "redispatch" part of a connection attempt. It
1817 * will assign a server if required, queue the connection if required, and
1818 * handle errors that might arise at this level. It can change the server
1819 * state. It will return 1 if it encounters an error, switches the server
1820 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1821 * that the connection is ready to use.
1822 */
1823
Willy Tarreau87b09662015-04-03 00:22:06 +02001824int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001825{
Willy Tarreau827aee92011-03-10 16:55:02 +01001826 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001827 int conn_err;
1828
1829 /* We know that we don't have any connection pending, so we will
1830 * try to get a new one, and wait in this state if it's queued
1831 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001832 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001833 conn_err = assign_server_and_queue(s);
1834 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001835
Willy Tarreaubaaee002006-06-26 02:48:02 +02001836 switch (conn_err) {
1837 case SRV_STATUS_OK:
1838 break;
1839
Willy Tarreau7c669d72008-06-20 15:04:11 +02001840 case SRV_STATUS_FULL:
1841 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1842 * and we can redispatch to another server, or it is not and we return
1843 * 503. This only makes sense in DIRECT mode however, because normal LB
1844 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001845 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001846 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001847 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001848 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001849 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001850 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001851 goto redispatch;
1852 }
1853
Willy Tarreau350f4872014-11-28 14:42:25 +01001854 if (!s->si[1].err_type) {
1855 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001856 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001857
Olivier Houchard237f7812019-03-08 18:49:07 +01001858 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1859 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001860 return 1;
1861
Willy Tarreaubaaee002006-06-26 02:48:02 +02001862 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001863 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001864 if (!s->si[1].err_type) {
1865 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001866 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001867
Olivier Houchard237f7812019-03-08 18:49:07 +01001868 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001869 return 1;
1870
1871 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001872 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1873 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001874 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001875 return 1;
1876
Willy Tarreaubaaee002006-06-26 02:48:02 +02001877 case SRV_STATUS_INTERNAL:
1878 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001879 if (!s->si[1].err_type) {
1880 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001881 }
1882
Willy Tarreau827aee92011-03-10 16:55:02 +01001883 if (srv)
1884 srv_inc_sess_ctr(srv);
1885 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001886 srv_set_sess_last(srv);
1887 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001888 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1889 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001890
Willy Tarreau87b09662015-04-03 00:22:06 +02001891 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001892 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001893 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001894 return 1;
1895 }
1896 /* if we get here, it's because we got SRV_STATUS_OK, which also
1897 * means that the connection has not been queued.
1898 */
1899 return 0;
1900}
1901
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001902/* sends a log message when a backend goes down, and also sets last
1903 * change date.
1904 */
1905void set_backend_down(struct proxy *be)
1906{
1907 be->last_change = now.tv_sec;
Olivier Houchard237f7812019-03-08 18:49:07 +01001908 _HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001909
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001910 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001911 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01001912 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
1913 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02001914}
1915
Willy Tarreau87b09662015-04-03 00:22:06 +02001916/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001917 * tries to extract an RDP cookie from the request buffer, and look for the
1918 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02001919 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001920 * list. Nothing is performed if a server was already assigned.
1921 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001922int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001923{
1924 struct proxy *px = s->be;
1925 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02001926 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001927 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01001928 uint16_t port;
1929 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001930 char *p;
1931
Christopher Faulet45073512018-07-20 10:16:29 +02001932 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 +02001933 now_ms, __FUNCTION__,
1934 s,
1935 req,
1936 req->rex, req->wex,
1937 req->flags,
Christopher Faulet45073512018-07-20 10:16:29 +02001938 ci_data(req),
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001939 req->analysers);
1940
Willy Tarreaue7dff022015-04-03 01:14:29 +02001941 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001942 goto no_cookie;
1943
Willy Tarreau37406352012-04-23 16:16:37 +02001944 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001945
Willy Tarreaucadd8c92013-07-22 18:09:52 +02001946 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001947 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001948 goto no_cookie;
1949
Willy Tarreau04276f32017-01-06 17:41:29 +01001950 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
1951 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
1952 * server's IP address in network order, and "port" is the integer corresponding to the
1953 * server's port in network order. Comments please Emeric.
1954 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001955 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001956 if (*p != '.')
1957 goto no_cookie;
1958 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01001959
1960 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001961 if (*p != '.')
1962 goto no_cookie;
1963
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001964 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001965 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02001966 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01001967 port == srv->svc_port &&
1968 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02001969 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001970 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001971 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001972 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02001973 break;
1974 }
1975 }
1976 srv = srv->next;
1977 }
1978
1979no_cookie:
1980 req->analysers &= ~an_bit;
1981 req->analyse_exp = TICK_ETERNITY;
1982 return 1;
1983}
1984
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001985int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01001986 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02001987 return px->down_time;
1988
1989 return now.tv_sec - px->last_change + px->down_time;
1990}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001991
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01001992/*
1993 * This function returns a string containing the balancing
1994 * mode of the proxy in a format suitable for stats.
1995 */
1996
1997const char *backend_lb_algo_str(int algo) {
1998
1999 if (algo == BE_LB_ALGO_RR)
2000 return "roundrobin";
2001 else if (algo == BE_LB_ALGO_SRR)
2002 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01002003 else if (algo == BE_LB_ALGO_FAS)
2004 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01002005 else if (algo == BE_LB_ALGO_LC)
2006 return "leastconn";
2007 else if (algo == BE_LB_ALGO_SH)
2008 return "source";
2009 else if (algo == BE_LB_ALGO_UH)
2010 return "uri";
2011 else if (algo == BE_LB_ALGO_PH)
2012 return "url_param";
2013 else if (algo == BE_LB_ALGO_HH)
2014 return "hdr";
2015 else if (algo == BE_LB_ALGO_RCH)
2016 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01002017 else if (algo == BE_LB_ALGO_NONE)
2018 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01002019 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01002020 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01002021}
2022
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002023/* This function parses a "balance" statement in a backend section describing
2024 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002025 * returns -1, it will write an error message into the <err> buffer which will
2026 * automatically be allocated and must be passed as NULL. The trailing '\n'
2027 * will not be written. The function must be called with <args> pointing to the
2028 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002029 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002030int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002031{
2032 if (!*(args[0])) {
2033 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01002034 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2035 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002036 return 0;
2037 }
2038
2039 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01002040 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2041 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002042 }
Willy Tarreau9757a382009-10-03 12:56:50 +02002043 else if (!strcmp(args[0], "static-rr")) {
2044 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2045 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
2046 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01002047 else if (!strcmp(args[0], "first")) {
2048 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2049 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
2050 }
Willy Tarreau51406232008-03-10 22:04:20 +01002051 else if (!strcmp(args[0], "leastconn")) {
2052 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2053 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
2054 }
Willy Tarreau21c741a2019-01-14 18:14:27 +01002055 else if (!strncmp(args[0], "random", 6)) {
Willy Tarreau760e81d2018-05-03 07:20:40 +02002056 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2057 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
Willy Tarreau21c741a2019-01-14 18:14:27 +01002058 curproxy->lbprm.arg_opt1 = 2;
2059
2060 if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */
2061 const char *beg;
2062 char *end;
2063
2064 beg = args[0] + 7;
2065 curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0);
2066
2067 if (*end != ')') {
2068 if (!*end)
2069 memprintf(err, "random : missing closing parenthesis.");
2070 else
2071 memprintf(err, "random : unexpected character '%c' after argument.", *end);
2072 return -1;
2073 }
2074
2075 if (curproxy->lbprm.arg_opt1 < 1) {
2076 memprintf(err, "random : number of draws must be at least 1.");
2077 return -1;
2078 }
2079 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02002080 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002081 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01002082 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2083 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002084 }
2085 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002086 int arg = 1;
2087
Willy Tarreau31682232007-11-29 15:38:04 +01002088 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2089 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Willy Tarreaua9a72492019-01-14 16:14:15 +01002090 curproxy->lbprm.arg_opt1 = 0; // "whole"
2091 curproxy->lbprm.arg_opt2 = 0; // "len"
2092 curproxy->lbprm.arg_opt3 = 0; // "depth"
vend_natalie.chenfb928392019-12-09 14:43:49 +08002093 curproxy->lbprm.arg_opt4 = 0; // "gerrit"
Oskar Stolc8dc41842012-05-19 10:19:54 +01002094
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002095 while (*args[arg]) {
2096 if (!strcmp(args[arg], "len")) {
2097 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002098 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002099 return -1;
2100 }
Willy Tarreaua9a72492019-01-14 16:14:15 +01002101 curproxy->lbprm.arg_opt2 = atoi(args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002102 arg += 2;
2103 }
2104 else if (!strcmp(args[arg], "depth")) {
2105 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002106 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002107 return -1;
2108 }
2109 /* hint: we store the position of the ending '/' (depth+1) so
2110 * that we avoid a comparison while computing the hash.
2111 */
Willy Tarreaua9a72492019-01-14 16:14:15 +01002112 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002113 arg += 2;
2114 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01002115 else if (!strcmp(args[arg], "whole")) {
Willy Tarreaua9a72492019-01-14 16:14:15 +01002116 curproxy->lbprm.arg_opt1 = 1;
Oskar Stolc8dc41842012-05-19 10:19:54 +01002117 arg += 1;
2118 }
vend_natalie.chenfb928392019-12-09 14:43:49 +08002119 else if (!strcmp(args[arg], "gerrit")) {
2120 if (!*args[arg+1] || (atoi(args[arg+1]) < 0)) {
2121 memprintf(err, "%s : '%s' expects a non negative integer (got '%s').", args[0], args[arg], args[arg+1]);
2122 return -1;
2123 }
2124 curproxy->lbprm.arg_opt4 = 1;
2125 // 0 means whole uri
2126 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]);
2127 arg += 2;
2128 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002129 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01002130 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002131 return -1;
2132 }
2133 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002134 }
Willy Tarreau01732802007-11-01 22:48:15 +01002135 else if (!strcmp(args[0], "url_param")) {
2136 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002137 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01002138 return -1;
2139 }
Willy Tarreau31682232007-11-29 15:38:04 +01002140 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2141 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02002142
Willy Tarreau4c03d1c2019-01-14 15:23:54 +01002143 free(curproxy->lbprm.arg_str);
2144 curproxy->lbprm.arg_str = strdup(args[1]);
2145 curproxy->lbprm.arg_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002146 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002147 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002148 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002149 return -1;
2150 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002151 }
Benoitaffb4812009-03-25 13:02:10 +01002152 }
2153 else if (!strncmp(args[0], "hdr(", 4)) {
2154 const char *beg, *end;
2155
2156 beg = args[0] + 4;
2157 end = strchr(beg, ')');
2158
2159 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002160 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01002161 return -1;
2162 }
2163
2164 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2165 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
2166
Willy Tarreau484ff072019-01-14 15:28:53 +01002167 free(curproxy->lbprm.arg_str);
2168 curproxy->lbprm.arg_len = end - beg;
2169 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
Willy Tarreau9fed8582019-01-14 16:04:54 +01002170 curproxy->lbprm.arg_opt1 = 0;
Benoitaffb4812009-03-25 13:02:10 +01002171
2172 if (*args[1]) {
2173 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002174 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01002175 return -1;
2176 }
Willy Tarreau9fed8582019-01-14 16:04:54 +01002177 curproxy->lbprm.arg_opt1 = 1;
Benoitaffb4812009-03-25 13:02:10 +01002178 }
Emeric Brun736aa232009-06-30 17:56:00 +02002179 }
2180 else if (!strncmp(args[0], "rdp-cookie", 10)) {
2181 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2182 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
2183
2184 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
2185 const char *beg, *end;
2186
2187 beg = args[0] + 11;
2188 end = strchr(beg, ')');
2189
2190 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002191 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002192 return -1;
2193 }
2194
Willy Tarreau484ff072019-01-14 15:28:53 +01002195 free(curproxy->lbprm.arg_str);
2196 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
2197 curproxy->lbprm.arg_len = end - beg;
Emeric Brun736aa232009-06-30 17:56:00 +02002198 }
2199 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
Willy Tarreau484ff072019-01-14 15:28:53 +01002200 free(curproxy->lbprm.arg_str);
2201 curproxy->lbprm.arg_str = strdup("mstshash");
2202 curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str);
Emeric Brun736aa232009-06-30 17:56:00 +02002203 }
2204 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002205 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002206 return -1;
2207 }
Willy Tarreau01732802007-11-01 22:48:15 +01002208 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002209 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002210 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 +01002211 return -1;
2212 }
2213 return 0;
2214}
2215
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002216
2217/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002218/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002219/************************************************************************/
2220
Willy Tarreau34db1082012-04-19 17:16:54 +02002221/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002222 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002223 * undefined behaviour.
2224 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002225static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002226smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002227{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002228 struct proxy *px;
2229
Willy Tarreau37406352012-04-23 16:16:37 +02002230 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002231 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002232 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002233
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002234 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002235
2236 return 1;
2237}
2238
Willy Tarreau37406352012-04-23 16:16:37 +02002239/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002240 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02002241 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2242 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002243 */
2244static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002245smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002246{
Willy Tarreau24e32d82012-04-23 23:55:44 +02002247 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002248
Willy Tarreau37406352012-04-23 16:16:37 +02002249 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002250 smp->data.type = SMP_T_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02002251 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
2252 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002253 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002254 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002255 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002256 return 1;
2257}
2258
Willy Tarreau34db1082012-04-19 17:16:54 +02002259/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002260 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002261 * undefined behaviour.
2262 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002263static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002264smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002265{
2266 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02002267
Willy Tarreau37406352012-04-23 16:16:37 +02002268 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002269 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002270 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002271
Willy Tarreau24e32d82012-04-23 23:55:44 +02002272 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02002273 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002274 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002275
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002276 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01002277 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002278 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002279 return 1;
2280 }
2281
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002282 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02002283 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002284 }
2285
2286 return 1;
2287}
2288
Willy Tarreaua5e37562011-12-16 17:06:15 +01002289/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002290static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002291smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002292{
Willy Tarreaube508f12016-03-10 11:47:01 +01002293 if (!smp->strm)
2294 return 0;
2295
Willy Tarreauf853c462012-04-23 18:53:56 +02002296 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002297 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002298 smp->data.u.sint = smp->strm->be->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002299 return 1;
2300}
2301
Marcin Deranekd2471c22016-12-12 14:08:05 +01002302/* set string to the name of the backend */
2303static int
2304smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2305{
2306 if (!smp->strm)
2307 return 0;
2308
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002309 smp->data.u.str.area = (char *)smp->strm->be->id;
2310 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002311 return 0;
2312
2313 smp->data.type = SMP_T_STR;
2314 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002315 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01002316
2317 return 1;
2318}
2319
Willy Tarreaua5e37562011-12-16 17:06:15 +01002320/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002321static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002322smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002323{
Willy Tarreaube508f12016-03-10 11:47:01 +01002324 if (!smp->strm)
2325 return 0;
2326
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002327 if (!objt_server(smp->strm->target))
Willy Tarreau17af4192011-02-23 14:27:06 +01002328 return 0;
2329
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002330 smp->data.type = SMP_T_SINT;
Willy Tarreau1e582e52018-09-20 11:29:28 +02002331 smp->data.u.sint = __objt_server(smp->strm->target)->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002332
2333 return 1;
2334}
2335
Willy Tarreau34db1082012-04-19 17:16:54 +02002336/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002337 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002338 * undefined behaviour.
2339 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002340static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002341smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002342{
Willy Tarreau37406352012-04-23 16:16:37 +02002343 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002344 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002345 smp->data.u.sint = read_freq_ctr(&args->data.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002346 return 1;
2347}
2348
Willy Tarreau34db1082012-04-19 17:16:54 +02002349/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002350 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002351 * undefined behaviour.
2352 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002353static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002354smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002355{
Willy Tarreau37406352012-04-23 16:16:37 +02002356 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002357 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002358 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02002359 return 1;
2360}
2361
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002362/* set temp integer to the number of available connections across available
2363 * servers on the backend.
2364 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
2365 * undefined behaviour.
2366 */
2367static int
2368smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2369{
2370 struct server *iterator;
2371 struct proxy *px;
2372 unsigned int maxconn;
2373
2374 smp->flags = SMP_F_VOL_TEST;
2375 smp->data.type = SMP_T_SINT;
2376 smp->data.u.sint = 0;
2377
2378 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
2379 if (iterator->cur_state == SRV_ST_STOPPED)
2380 continue;
2381
2382 px = iterator->proxy;
2383 if (!srv_currently_usable(iterator) ||
2384 ((iterator->flags & SRV_F_BACKUP) &&
2385 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
2386 continue;
2387
2388 if (iterator->maxconn == 0) {
2389 /* one active server is unlimited, return -1 */
2390 smp->data.u.sint = -1;
2391 return 1;
2392 }
2393
2394 maxconn = srv_dynamic_maxconn(iterator);
2395 if (maxconn > iterator->cur_sess)
2396 smp->data.u.sint += maxconn - iterator->cur_sess;
2397 }
2398
2399 return 1;
2400}
2401
Willy Tarreau34db1082012-04-19 17:16:54 +02002402/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002403 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002404 * undefined behaviour.
2405 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002406static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002407smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002408{
Willy Tarreau37406352012-04-23 16:16:37 +02002409 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002410 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002411 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002412 return 1;
2413}
2414
Willy Tarreaua5e37562011-12-16 17:06:15 +01002415/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002416 * by the number of running servers and rounded up. If there is no running
2417 * server, we return twice the total, just as if we had half a running server.
2418 * This is more or less correct anyway, since we expect the last server to come
2419 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002420 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002421 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002422 */
2423static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002424smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002425{
2426 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002427 struct proxy *px;
Willy Tarreaua36af912009-10-10 12:02:45 +02002428
Willy Tarreau37406352012-04-23 16:16:37 +02002429 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002430 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002431 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002432
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002433 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002434
2435 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002436 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002437 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002438 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002439
2440 return 1;
2441}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002442
Willy Tarreau34db1082012-04-19 17:16:54 +02002443/* set temp integer to the number of concurrent connections on the server in the backend.
2444 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2445 * undefined behaviour.
2446 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002447static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002448smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002449{
Willy Tarreauf853c462012-04-23 18:53:56 +02002450 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002451 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002452 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002453 return 1;
2454}
2455
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002456/* set temp integer to the number of available connections on the server in the backend.
2457 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2458 * undefined behaviour.
2459 */
2460static int
2461smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2462{
2463 unsigned int maxconn;
2464
2465 smp->flags = SMP_F_VOL_TEST;
2466 smp->data.type = SMP_T_SINT;
2467
2468 if (args->data.srv->maxconn == 0) {
2469 /* one active server is unlimited, return -1 */
2470 smp->data.u.sint = -1;
2471 return 1;
2472 }
2473
2474 maxconn = srv_dynamic_maxconn(args->data.srv);
2475 if (maxconn > args->data.srv->cur_sess)
2476 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2477 else
2478 smp->data.u.sint = 0;
2479
2480 return 1;
2481}
2482
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002483/* set temp integer to the number of connections pending in the server's queue.
2484 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2485 * undefined behaviour.
2486 */
2487static int
2488smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2489{
2490 smp->flags = SMP_F_VOL_TEST;
2491 smp->data.type = SMP_T_SINT;
2492 smp->data.u.sint = args->data.srv->nbpend;
2493 return 1;
2494}
2495
Tait Clarridge7896d522012-12-05 21:39:31 -05002496/* set temp integer to the number of enabled servers on the proxy.
2497 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2498 * undefined behaviour.
2499 */
2500static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002501smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002502{
2503 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002504 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002505 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002506 return 1;
2507}
2508
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002509static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2510{
2511
2512 struct proxy *px;
2513
2514 if (!smp_make_safe(smp))
2515 return 0;
2516
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002517 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002518 if (!px)
2519 return 0;
2520
2521 smp->data.type = SMP_T_SINT;
2522 smp->data.u.sint = be_usable_srv(px);
2523
2524 return 1;
2525}
2526
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002527
2528/* Note: must not be declared <const> as its list will be overwritten.
2529 * Please take care of keeping this list alphabetically sorted.
2530 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002531static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002532 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2533 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002534 { "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 +02002535 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002536 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002537 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2538 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2539 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2540 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2541 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002542 { "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 +02002543 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002544 { "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 +02002545 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002546 { "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 +01002547 { /* END */ },
2548}};
2549
Willy Tarreau0108d902018-11-25 19:14:37 +01002550INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2551
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002552/* Note: must not be declared <const> as its list will be overwritten */
2553static struct sample_conv_kw_list sample_conv_kws = {ILH, {
2554 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2555 { /* END */ },
2556}};
2557
Willy Tarreau0108d902018-11-25 19:14:37 +01002558INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002559
Willy Tarreau61612d42012-04-19 18:42:05 +02002560/* Note: must not be declared <const> as its list will be overwritten.
2561 * Please take care of keeping this list alphabetically sorted.
2562 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002563static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002564 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002565}};
2566
Willy Tarreau0108d902018-11-25 19:14:37 +01002567INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002568
Willy Tarreaubaaee002006-06-26 02:48:02 +02002569/*
2570 * Local variables:
2571 * c-indent-level: 8
2572 * c-basic-offset: 8
2573 * End:
2574 */