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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Proxy variables and functions.
3 *
Willy Tarreau3a7d2072009-03-05 23:48:25 +01004 * Copyright 2000-2009 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 <fcntl.h>
14#include <unistd.h>
Willy Tarreauc8f24f82007-11-30 18:38:35 +010015#include <string.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020016#include <sys/types.h>
17#include <sys/socket.h>
18#include <sys/stat.h>
19
Willy Tarreau2dd0d472006-06-29 17:53:05 +020020#include <common/defaults.h>
Willy Tarreau9de1bbd2008-07-09 20:34:27 +020021#include <common/cfgparse.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020022#include <common/compat.h>
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020023#include <common/config.h>
Willy Tarreaud740bab2007-10-28 11:14:07 +010024#include <common/errors.h>
Willy Tarreau4d2d0982007-05-14 00:39:29 +020025#include <common/memory.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020026#include <common/time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020027
Willy Tarreaucfd837f2014-03-15 07:43:51 +010028#include <eb32tree.h>
29#include <ebistree.h>
30
Willy Tarreaubaaee002006-06-26 02:48:02 +020031#include <types/global.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010032#include <types/obj_type.h>
Emeric Brun5a8c0a92010-09-23 18:44:36 +020033#include <types/peers.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020034
Alexandre Cassen87ea5482007-10-11 20:48:58 +020035#include <proto/backend.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020036#include <proto/fd.h>
Willy Tarreau51aecc72009-07-12 09:47:04 +020037#include <proto/hdr_idx.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020038#include <proto/listener.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020039#include <proto/log.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010040#include <proto/proto_tcp.h>
Willy Tarreau39e4f622010-05-31 17:01:36 +020041#include <proto/proto_http.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020042#include <proto/proxy.h>
Willy Tarreaud0807c32010-08-27 18:26:11 +020043#include <proto/signal.h>
Willy Tarreaufb0afa72015-04-03 14:46:27 +020044#include <proto/stream.h>
Emeric Brun5a8c0a92010-09-23 18:44:36 +020045#include <proto/task.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020046
47
Willy Tarreau918ff602011-07-25 16:33:49 +020048int listeners; /* # of proxy listeners, set by cfgparse */
Willy Tarreaubaaee002006-06-26 02:48:02 +020049struct proxy *proxy = NULL; /* list of all existing proxies */
Willy Tarreau53fb4ae2009-10-04 23:04:08 +020050struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */
Willy Tarreauf79d9502014-03-15 07:22:35 +010051struct eb_root proxy_by_name = EB_ROOT; /* tree of proxies sorted by name */
Willy Tarreau10479e42010-12-12 14:00:34 +010052unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */
Willy Tarreaubaaee002006-06-26 02:48:02 +020053
Willy Tarreau977b8e42006-12-29 14:19:17 +010054/*
Willy Tarreau816eb542007-11-04 07:04:43 +010055 * This function returns a string containing a name describing capabilities to
56 * report comprehensible error messages. Specifically, it will return the words
57 * "frontend", "backend", "ruleset" when appropriate, or "proxy" for all other
58 * cases including the proxies declared in "listen" mode.
Willy Tarreau977b8e42006-12-29 14:19:17 +010059 */
Willy Tarreau816eb542007-11-04 07:04:43 +010060const char *proxy_cap_str(int cap)
Willy Tarreau977b8e42006-12-29 14:19:17 +010061{
Willy Tarreau816eb542007-11-04 07:04:43 +010062 if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) {
63 if (cap & PR_CAP_FE)
64 return "frontend";
65 else if (cap & PR_CAP_BE)
66 return "backend";
67 else if (cap & PR_CAP_RS)
68 return "ruleset";
69 }
70 return "proxy";
Willy Tarreau977b8e42006-12-29 14:19:17 +010071}
72
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +010073/*
74 * This function returns a string containing the mode of the proxy in a format
75 * suitable for error messages.
76 */
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +010077const char *proxy_mode_str(int mode) {
78
79 if (mode == PR_MODE_TCP)
80 return "tcp";
81 else if (mode == PR_MODE_HTTP)
82 return "http";
83 else if (mode == PR_MODE_HEALTH)
84 return "health";
85 else
86 return "unknown";
87}
88
Willy Tarreauf3950172009-10-10 18:35:51 +020089/*
90 * This function scans the list of backends and servers to retrieve the first
91 * backend and the first server with the given names, and sets them in both
92 * parameters. It returns zero if either is not found, or non-zero and sets
93 * the ones it did not found to NULL. If a NULL pointer is passed for the
94 * backend, only the pointer to the server will be updated.
95 */
96int get_backend_server(const char *bk_name, const char *sv_name,
97 struct proxy **bk, struct server **sv)
98{
99 struct proxy *p;
100 struct server *s;
Willy Tarreau7ecc4202014-03-15 07:57:11 +0100101 int sid;
Willy Tarreauf3950172009-10-10 18:35:51 +0200102
103 *sv = NULL;
104
Willy Tarreau050536d2012-10-04 08:47:34 +0200105 sid = -1;
Willy Tarreaucfeaa472009-10-10 22:33:08 +0200106 if (*sv_name == '#')
107 sid = atoi(sv_name + 1);
108
Willy Tarreau7ecc4202014-03-15 07:57:11 +0100109 p = findproxy(bk_name, PR_CAP_BE);
Willy Tarreauf3950172009-10-10 18:35:51 +0200110 if (bk)
111 *bk = p;
112 if (!p)
113 return 0;
114
115 for (s = p->srv; s; s = s->next)
Willy Tarreau4055a102012-11-15 00:15:18 +0100116 if ((sid >= 0 && s->puid == sid) ||
117 (sid < 0 && strcmp(s->id, sv_name) == 0))
Willy Tarreauf3950172009-10-10 18:35:51 +0200118 break;
119 *sv = s;
120 if (!s)
121 return 0;
122 return 1;
123}
124
Willy Tarreaue219db72007-12-03 01:30:13 +0100125/* This function parses a "timeout" statement in a proxy section. It returns
126 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200127 * return zero, it will write an error or warning message into a preallocated
128 * buffer returned at <err>. The trailing is not be written. The function must
129 * be called with <args> pointing to the first command line word, with <proxy>
130 * pointing to the proxy being parsed, and <defpx> to the default proxy or NULL.
131 * As a special case for compatibility with older configs, it also accepts
132 * "{cli|srv|con}timeout" in args[0].
Willy Tarreaue219db72007-12-03 01:30:13 +0100133 */
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200134static int proxy_parse_timeout(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200135 struct proxy *defpx, const char *file, int line,
136 char **err)
Willy Tarreaue219db72007-12-03 01:30:13 +0100137{
138 unsigned timeout;
139 int retval, cap;
140 const char *res, *name;
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200141 int *tv = NULL;
142 int *td = NULL;
Willy Tarreaued446492014-04-28 22:56:38 +0200143 int warn = 0;
Willy Tarreaue219db72007-12-03 01:30:13 +0100144
145 retval = 0;
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200146
147 /* simply skip "timeout" but remain compatible with old form */
148 if (strcmp(args[0], "timeout") == 0)
149 args++;
150
Willy Tarreaue219db72007-12-03 01:30:13 +0100151 name = args[0];
Willy Tarreaued446492014-04-28 22:56:38 +0200152 if (!strcmp(args[0], "client") || (!strcmp(args[0], "clitimeout") && (warn = WARN_CLITO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100153 name = "client";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100154 tv = &proxy->timeout.client;
155 td = &defpx->timeout.client;
Willy Tarreaue219db72007-12-03 01:30:13 +0100156 cap = PR_CAP_FE;
157 } else if (!strcmp(args[0], "tarpit")) {
158 tv = &proxy->timeout.tarpit;
159 td = &defpx->timeout.tarpit;
Willy Tarreau51c9bde2008-01-06 13:40:03 +0100160 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100161 } else if (!strcmp(args[0], "http-keep-alive")) {
162 tv = &proxy->timeout.httpka;
163 td = &defpx->timeout.httpka;
164 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreau036fae02008-01-06 13:24:40 +0100165 } else if (!strcmp(args[0], "http-request")) {
166 tv = &proxy->timeout.httpreq;
167 td = &defpx->timeout.httpreq;
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200168 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaued446492014-04-28 22:56:38 +0200169 } else if (!strcmp(args[0], "server") || (!strcmp(args[0], "srvtimeout") && (warn = WARN_SRVTO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100170 name = "server";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100171 tv = &proxy->timeout.server;
172 td = &defpx->timeout.server;
Willy Tarreaue219db72007-12-03 01:30:13 +0100173 cap = PR_CAP_BE;
Willy Tarreaued446492014-04-28 22:56:38 +0200174 } else if (!strcmp(args[0], "connect") || (!strcmp(args[0], "contimeout") && (warn = WARN_CONTO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100175 name = "connect";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100176 tv = &proxy->timeout.connect;
177 td = &defpx->timeout.connect;
Willy Tarreaue219db72007-12-03 01:30:13 +0100178 cap = PR_CAP_BE;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100179 } else if (!strcmp(args[0], "check")) {
180 tv = &proxy->timeout.check;
181 td = &defpx->timeout.check;
182 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100183 } else if (!strcmp(args[0], "queue")) {
184 tv = &proxy->timeout.queue;
185 td = &defpx->timeout.queue;
186 cap = PR_CAP_BE;
Willy Tarreauce887fd2012-05-12 12:50:00 +0200187 } else if (!strcmp(args[0], "tunnel")) {
188 tv = &proxy->timeout.tunnel;
189 td = &defpx->timeout.tunnel;
190 cap = PR_CAP_BE;
Willy Tarreau05cdd962014-05-10 14:30:07 +0200191 } else if (!strcmp(args[0], "client-fin")) {
192 tv = &proxy->timeout.clientfin;
193 td = &defpx->timeout.clientfin;
194 cap = PR_CAP_FE;
195 } else if (!strcmp(args[0], "server-fin")) {
196 tv = &proxy->timeout.serverfin;
197 td = &defpx->timeout.serverfin;
198 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100199 } else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200200 memprintf(err,
201 "'timeout' supports 'client', 'server', 'connect', 'check', "
Willy Tarreau05cdd962014-05-10 14:30:07 +0200202 "'queue', 'http-keep-alive', 'http-request', 'tunnel', 'tarpit', "
203 "'client-fin' and 'server-fin' (got '%s')",
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200204 args[0]);
Willy Tarreaue219db72007-12-03 01:30:13 +0100205 return -1;
206 }
207
208 if (*args[1] == 0) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200209 memprintf(err, "'timeout %s' expects an integer value (in milliseconds)", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100210 return -1;
211 }
212
213 res = parse_time_err(args[1], &timeout, TIME_UNIT_MS);
214 if (res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200215 memprintf(err, "unexpected character '%c' in 'timeout %s'", *res, name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100216 return -1;
217 }
218
219 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200220 memprintf(err, "'timeout %s' will be ignored because %s '%s' has no %s capability",
221 name, proxy_type_str(proxy), proxy->id,
222 (cap & PR_CAP_BE) ? "backend" : "frontend");
Willy Tarreaue219db72007-12-03 01:30:13 +0100223 retval = 1;
224 }
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200225 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200226 memprintf(err, "overwriting 'timeout %s' which was already specified", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100227 retval = 1;
228 }
Willy Tarreaued446492014-04-28 22:56:38 +0200229 else if (warn) {
230 if (!already_warned(warn)) {
231 memprintf(err, "the '%s' directive is now deprecated in favor of 'timeout %s', and will not be supported in future versions.",
232 args[0], name);
233 retval = 1;
234 }
235 }
Willy Tarreaue219db72007-12-03 01:30:13 +0100236
Willy Tarreaufac5b592014-05-22 08:24:46 +0200237 if (*args[2] != 0) {
238 memprintf(err, "'timeout %s' : unexpected extra argument '%s' after value '%s'.", name, args[2], args[1]);
239 retval = -1;
240 }
241
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200242 *tv = MS_TO_TICKS(timeout);
Willy Tarreaue219db72007-12-03 01:30:13 +0100243 return retval;
244}
245
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100246/* This function parses a "rate-limit" statement in a proxy section. It returns
247 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200248 * return zero, it will write an error or warning message into a preallocated
249 * buffer returned at <err>. The function must be called with <args> pointing
250 * to the first command line word, with <proxy> pointing to the proxy being
251 * parsed, and <defpx> to the default proxy or NULL.
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100252 */
253static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200254 struct proxy *defpx, const char *file, int line,
255 char **err)
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100256{
257 int retval, cap;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200258 char *res;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100259 unsigned int *tv = NULL;
260 unsigned int *td = NULL;
261 unsigned int val;
262
263 retval = 0;
264
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200265 if (strcmp(args[1], "sessions") == 0) {
Willy Tarreau13a34bd2009-05-10 18:52:49 +0200266 tv = &proxy->fe_sps_lim;
267 td = &defpx->fe_sps_lim;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100268 cap = PR_CAP_FE;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200269 }
270 else {
271 memprintf(err, "'%s' only supports 'sessions' (got '%s')", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100272 return -1;
273 }
274
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200275 if (*args[2] == 0) {
276 memprintf(err, "'%s %s' expects expects an integer value (in sessions/second)", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100277 return -1;
278 }
279
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200280 val = strtoul(args[2], &res, 0);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100281 if (*res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200282 memprintf(err, "'%s %s' : unexpected character '%c' in integer value '%s'", args[0], args[1], *res, args[2]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100283 return -1;
284 }
285
286 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200287 memprintf(err, "%s %s will be ignored because %s '%s' has no %s capability",
288 args[0], args[1], proxy_type_str(proxy), proxy->id,
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100289 (cap & PR_CAP_BE) ? "backend" : "frontend");
290 retval = 1;
291 }
292 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200293 memprintf(err, "overwriting %s %s which was already specified", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100294 retval = 1;
295 }
296
297 *tv = val;
298 return retval;
299}
300
Willy Tarreauc35362a2014-04-25 13:58:37 +0200301/* This function parses a "max-keep-alive-queue" statement in a proxy section.
302 * It returns -1 if there is any error, 1 for a warning, otherwise zero. If it
303 * does not return zero, it will write an error or warning message into a
304 * preallocated buffer returned at <err>. The function must be called with
305 * <args> pointing to the first command line word, with <proxy> pointing to
306 * the proxy being parsed, and <defpx> to the default proxy or NULL.
307 */
308static int proxy_parse_max_ka_queue(char **args, int section, struct proxy *proxy,
309 struct proxy *defpx, const char *file, int line,
310 char **err)
311{
312 int retval;
313 char *res;
314 unsigned int val;
315
316 retval = 0;
317
318 if (*args[1] == 0) {
319 memprintf(err, "'%s' expects expects an integer value (or -1 to disable)", args[0]);
320 return -1;
321 }
322
323 val = strtol(args[1], &res, 0);
324 if (*res) {
325 memprintf(err, "'%s' : unexpected character '%c' in integer value '%s'", args[0], *res, args[1]);
326 return -1;
327 }
328
329 if (!(proxy->cap & PR_CAP_BE)) {
330 memprintf(err, "%s will be ignored because %s '%s' has no backend capability",
331 args[0], proxy_type_str(proxy), proxy->id);
332 retval = 1;
333 }
334
335 /* we store <val+1> so that a user-facing value of -1 is stored as zero (default) */
336 proxy->max_ka_queue = val + 1;
337 return retval;
338}
339
Willy Tarreauf79d9502014-03-15 07:22:35 +0100340/* This function inserts proxy <px> into the tree of known proxies. The proxy's
341 * name is used as the storing key so it must already have been initialized.
342 */
343void proxy_store_name(struct proxy *px)
344{
345 px->conf.by_name.key = px->id;
346 ebis_insert(&proxy_by_name, &px->conf.by_name);
347}
348
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100349/*
350 * This function finds a proxy with matching name, mode and with satisfying
351 * capabilities. It also checks if there are more matching proxies with
352 * requested name as this often leads into unexpected situations.
353 */
354
Alex Williams96532db2009-11-01 21:27:13 -0500355struct proxy *findproxy_mode(const char *name, int mode, int cap) {
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100356
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100357 struct proxy *curproxy, *target = NULL;
Willy Tarreauf79d9502014-03-15 07:22:35 +0100358 struct ebpt_node *node;
359
360 for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
361 curproxy = container_of(node, struct proxy, conf.by_name);
362
363 if (strcmp(curproxy->id, name) != 0)
364 break;
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100365
Willy Tarreauf79d9502014-03-15 07:22:35 +0100366 if ((curproxy->cap & cap) != cap)
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100367 continue;
368
Willy Tarreau51aecc72009-07-12 09:47:04 +0200369 if (curproxy->mode != mode &&
370 !(curproxy->mode == PR_MODE_HTTP && mode == PR_MODE_TCP)) {
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100371 Alert("Unable to use proxy '%s' with wrong mode, required: %s, has: %s.\n",
372 name, proxy_mode_str(mode), proxy_mode_str(curproxy->mode));
373 Alert("You may want to use 'mode %s'.\n", proxy_mode_str(mode));
374 return NULL;
375 }
376
377 if (!target) {
378 target = curproxy;
379 continue;
380 }
381
Willy Tarreau816eb542007-11-04 07:04:43 +0100382 Alert("Refusing to use duplicated proxy '%s' with overlapping capabilities: %s/%s!\n",
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100383 name, proxy_type_str(curproxy), proxy_type_str(target));
384
385 return NULL;
386 }
387
388 return target;
389}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200390
Willy Tarreaubc216c42011-08-02 11:25:54 +0200391/* Returns a pointer to the proxy matching either name <name>, or id <name> if
392 * <name> begins with a '#'. NULL is returned if no match is found, as well as
393 * if multiple matches are found (eg: too large capabilities mask).
394 */
Alex Williams96532db2009-11-01 21:27:13 -0500395struct proxy *findproxy(const char *name, int cap) {
396
397 struct proxy *curproxy, *target = NULL;
Willy Tarreau050536d2012-10-04 08:47:34 +0200398 int pid = -1;
Willy Tarreaubc216c42011-08-02 11:25:54 +0200399
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100400 if (*name == '#') {
401 struct eb32_node *node;
402
Willy Tarreaubc216c42011-08-02 11:25:54 +0200403 pid = atoi(name + 1);
Alex Williams96532db2009-11-01 21:27:13 -0500404
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100405 for (node = eb32_lookup(&used_proxy_id, pid); node; node = eb32_next(node)) {
406 curproxy = container_of(node, struct proxy, conf.id);
Alex Williams96532db2009-11-01 21:27:13 -0500407
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100408 if (curproxy->uuid != pid)
409 break;
410
411 if ((curproxy->cap & cap) != cap)
412 continue;
413
414 if (target)
415 return NULL;
416
Alex Williams96532db2009-11-01 21:27:13 -0500417 target = curproxy;
Alex Williams96532db2009-11-01 21:27:13 -0500418 }
Alex Williams96532db2009-11-01 21:27:13 -0500419 }
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100420 else {
421 struct ebpt_node *node;
422
423 for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
424 curproxy = container_of(node, struct proxy, conf.by_name);
Alex Williams96532db2009-11-01 21:27:13 -0500425
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100426 if (strcmp(curproxy->id, name) != 0)
427 break;
428
429 if ((curproxy->cap & cap) != cap)
430 continue;
431
432 if (target)
433 return NULL;
434
435 target = curproxy;
436 }
437 }
Alex Williams96532db2009-11-01 21:27:13 -0500438 return target;
439}
440
Willy Tarreaubaaee002006-06-26 02:48:02 +0200441/*
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100442 * This function finds a server with matching name within selected proxy.
443 * It also checks if there are more matching servers with
444 * requested name as this often leads into unexpected situations.
445 */
446
447struct server *findserver(const struct proxy *px, const char *name) {
448
449 struct server *cursrv, *target = NULL;
450
451 if (!px)
452 return NULL;
453
454 for (cursrv = px->srv; cursrv; cursrv = cursrv->next) {
455 if (strcmp(cursrv->id, name))
456 continue;
457
458 if (!target) {
459 target = cursrv;
460 continue;
461 }
462
Cyril Bonté0bb519e2012-04-04 12:57:19 +0200463 Alert("Refusing to use duplicated server '%s' found in proxy: %s!\n",
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100464 name, px->id);
465
466 return NULL;
467 }
468
469 return target;
470}
471
Willy Tarreauff01a212009-03-15 13:46:16 +0100472/* This function checks that the designated proxy has no http directives
473 * enabled. It will output a warning if there are, and will fix some of them.
474 * It returns the number of fatal errors encountered. This should be called
475 * at the end of the configuration parsing if the proxy is not in http mode.
476 * The <file> argument is used to construct the error message.
477 */
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200478int proxy_cfg_ensure_no_http(struct proxy *curproxy)
Willy Tarreauff01a212009-03-15 13:46:16 +0100479{
480 if (curproxy->cookie_name != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200481 Warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n",
482 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100483 }
484 if (curproxy->rsp_exp != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200485 Warning("config : server regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
486 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100487 }
488 if (curproxy->req_exp != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200489 Warning("config : client regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
490 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100491 }
492 if (curproxy->monitor_uri != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200493 Warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n",
494 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100495 }
Willy Tarreauf3e49f92009-10-03 12:21:20 +0200496 if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) {
Willy Tarreauff01a212009-03-15 13:46:16 +0100497 curproxy->lbprm.algo &= ~BE_LB_ALGO;
498 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200499 Warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n",
500 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100501 }
Willy Tarreau17804162009-11-09 21:27:51 +0100502 if (curproxy->to_log & (LW_REQ | LW_RESP)) {
503 curproxy->to_log &= ~(LW_REQ | LW_RESP);
Willy Tarreau59ad1a22014-01-29 14:39:58 +0100504 Warning("parsing [%s:%d] : HTTP log/header format not usable with %s '%s' (needs 'mode http').\n",
Willy Tarreaub1f3af22013-04-12 18:30:32 +0200505 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
Willy Tarreau17804162009-11-09 21:27:51 +0100506 proxy_type_str(curproxy), curproxy->id);
507 }
Willy Tarreau62a61232013-04-12 18:13:46 +0200508 if (curproxy->conf.logformat_string == default_http_log_format ||
509 curproxy->conf.logformat_string == clf_http_log_format) {
510 /* Note: we don't change the directive's file:line number */
511 curproxy->conf.logformat_string = default_tcp_log_format;
512 Warning("parsing [%s:%d] : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n",
513 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
Willy Tarreau196729e2012-05-31 19:30:26 +0200514 proxy_type_str(curproxy), curproxy->id);
515 }
516
Willy Tarreauff01a212009-03-15 13:46:16 +0100517 return 0;
518}
519
Willy Tarreau237250c2011-07-29 01:49:03 +0200520/* Perform the most basic initialization of a proxy :
521 * memset(), list_init(*), reset_timeouts(*).
Willy Tarreaub249e842011-09-07 18:41:08 +0200522 * Any new proxy or peer should be initialized via this function.
Willy Tarreau237250c2011-07-29 01:49:03 +0200523 */
524void init_new_proxy(struct proxy *p)
525{
526 memset(p, 0, sizeof(struct proxy));
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100527 p->obj_type = OBJ_TYPE_PROXY;
Willy Tarreau237250c2011-07-29 01:49:03 +0200528 LIST_INIT(&p->pendconns);
529 LIST_INIT(&p->acl);
530 LIST_INIT(&p->http_req_rules);
Willy Tarreaue365c0b2013-06-11 16:06:12 +0200531 LIST_INIT(&p->http_res_rules);
Willy Tarreau353bc9f2014-04-28 22:05:31 +0200532 LIST_INIT(&p->block_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200533 LIST_INIT(&p->redirect_rules);
534 LIST_INIT(&p->mon_fail_cond);
535 LIST_INIT(&p->switching_rules);
Willy Tarreau4a5cade2012-04-05 21:09:48 +0200536 LIST_INIT(&p->server_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200537 LIST_INIT(&p->persist_rules);
538 LIST_INIT(&p->sticking_rules);
539 LIST_INIT(&p->storersp_rules);
540 LIST_INIT(&p->tcp_req.inspect_rules);
541 LIST_INIT(&p->tcp_rep.inspect_rules);
542 LIST_INIT(&p->tcp_req.l4_rules);
543 LIST_INIT(&p->req_add);
544 LIST_INIT(&p->rsp_add);
545 LIST_INIT(&p->listener_queue);
William Lallemand0f99e342011-10-12 17:50:54 +0200546 LIST_INIT(&p->logsrvs);
William Lallemand723b73a2012-02-08 16:37:49 +0100547 LIST_INIT(&p->logformat);
William Lallemanda73203e2012-03-12 12:48:57 +0100548 LIST_INIT(&p->format_unique_id);
Willy Tarreau2a65ff02012-09-13 17:54:29 +0200549 LIST_INIT(&p->conf.bind);
Willy Tarreau4348fad2012-09-20 16:48:07 +0200550 LIST_INIT(&p->conf.listeners);
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200551 LIST_INIT(&p->conf.args.list);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200552 LIST_INIT(&p->tcpcheck_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200553
554 /* Timeouts are defined as -1 */
555 proxy_reset_timeouts(p);
556 p->tcp_rep.inspect_delay = TICK_ETERNITY;
Willy Tarreau050536d2012-10-04 08:47:34 +0200557
558 /* initial uuid is unassigned (-1) */
559 p->uuid = -1;
Willy Tarreau237250c2011-07-29 01:49:03 +0200560}
561
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100562/*
Willy Tarreau2ff76222007-04-09 19:29:56 +0200563 * This function creates all proxy sockets. It should be done very early,
564 * typically before privileges are dropped. The sockets will be registered
565 * but not added to any fd_set, in order not to loose them across the fork().
Willy Tarreau562515c2011-07-25 08:11:52 +0200566 * The proxies also start in READY state because they all have their listeners
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200567 * bound.
Willy Tarreau2ff76222007-04-09 19:29:56 +0200568 *
569 * Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
570 * Retryable errors will only be printed if <verbose> is not zero.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200571 */
572int start_proxies(int verbose)
573{
574 struct proxy *curproxy;
575 struct listener *listener;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100576 int lerr, err = ERR_NONE;
577 int pxerr;
578 char msg[100];
Willy Tarreaubaaee002006-06-26 02:48:02 +0200579
580 for (curproxy = proxy; curproxy != NULL; curproxy = curproxy->next) {
581 if (curproxy->state != PR_STNEW)
582 continue; /* already initialized */
583
584 pxerr = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +0200585 list_for_each_entry(listener, &curproxy->conf.listeners, by_fe) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100586 if (listener->state != LI_ASSIGNED)
587 continue; /* already started */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200588
Emeric Bruncf20bf12010-10-22 16:06:11 +0200589 lerr = listener->proto->bind(listener, msg, sizeof(msg));
Willy Tarreaubaaee002006-06-26 02:48:02 +0200590
Willy Tarreaue6b98942007-10-29 01:09:36 +0100591 /* errors are reported if <verbose> is set or if they are fatal */
592 if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) {
593 if (lerr & ERR_ALERT)
594 Alert("Starting %s %s: %s\n",
595 proxy_type_str(curproxy), curproxy->id, msg);
596 else if (lerr & ERR_WARN)
597 Warning("Starting %s %s: %s\n",
598 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200599 }
600
Willy Tarreaue6b98942007-10-29 01:09:36 +0100601 err |= lerr;
602 if (lerr & (ERR_ABORT | ERR_FATAL)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200603 pxerr |= 1;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100604 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200605 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100606 else if (lerr & ERR_CODE) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200607 pxerr |= 1;
608 continue;
609 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200610 }
611
612 if (!pxerr) {
Willy Tarreau562515c2011-07-25 08:11:52 +0200613 curproxy->state = PR_STREADY;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200614 send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id);
615 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100616
617 if (err & ERR_ABORT)
618 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200619 }
620
621 return err;
622}
623
624
625/*
Willy Tarreau918ff602011-07-25 16:33:49 +0200626 * This is the proxy management task. It enables proxies when there are enough
Willy Tarreau87b09662015-04-03 00:22:06 +0200627 * free streams, or stops them when the table is full. It is designed to be
Willy Tarreau918ff602011-07-25 16:33:49 +0200628 * called as a task which is woken up upon stopping or when rate limiting must
629 * be enforced.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200630 */
Willy Tarreau918ff602011-07-25 16:33:49 +0200631struct task *manage_proxy(struct task *t)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200632{
Willy Tarreau918ff602011-07-25 16:33:49 +0200633 struct proxy *p = t->context;
634 int next = TICK_ETERNITY;
Willy Tarreau79584222009-03-06 09:18:27 +0100635 unsigned int wait;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200636
Willy Tarreau918ff602011-07-25 16:33:49 +0200637 /* We should periodically try to enable listeners waiting for a
638 * global resource here.
639 */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200640
Willy Tarreau918ff602011-07-25 16:33:49 +0200641 /* first, let's check if we need to stop the proxy */
642 if (unlikely(stopping && p->state != PR_STSTOPPED)) {
643 int t;
644 t = tick_remain(now_ms, p->stop_time);
645 if (t == 0) {
646 Warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
647 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
648 send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
649 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
650 stop_proxy(p);
651 /* try to free more memory */
652 pool_gc2();
653 }
654 else {
655 next = tick_first(next, p->stop_time);
656 }
657 }
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200658
Willy Tarreau3a925c12013-09-04 17:54:01 +0200659 /* If the proxy holds a stick table, we need to purge all unused
660 * entries. These are all the ones in the table with ref_cnt == 0
661 * and all the ones in the pool used to allocate new entries. Any
Willy Tarreau87b09662015-04-03 00:22:06 +0200662 * entry attached to an existing stream waiting for a store will
Willy Tarreau3a925c12013-09-04 17:54:01 +0200663 * be in neither list. Any entry being dumped will have ref_cnt > 0.
664 * However we protect tables that are being synced to peers.
665 */
666 if (unlikely(stopping && p->state == PR_STSTOPPED && p->table.current)) {
667 if (!p->table.syncing) {
668 stktable_trash_oldest(&p->table, p->table.current);
669 pool_gc2();
670 }
671 if (p->table.current) {
672 /* some entries still remain, let's recheck in one second */
673 next = tick_first(next, tick_add(now_ms, 1000));
674 }
675 }
676
Willy Tarreau918ff602011-07-25 16:33:49 +0200677 /* the rest below is just for frontends */
678 if (!(p->cap & PR_CAP_FE))
679 goto out;
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200680
Willy Tarreau918ff602011-07-25 16:33:49 +0200681 /* check the various reasons we may find to block the frontend */
682 if (unlikely(p->feconn >= p->maxconn)) {
683 if (p->state == PR_STREADY)
684 p->state = PR_STFULL;
685 goto out;
686 }
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100687
Willy Tarreau918ff602011-07-25 16:33:49 +0200688 /* OK we have no reason to block, so let's unblock if we were blocking */
689 if (p->state == PR_STFULL)
690 p->state = PR_STREADY;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100691
Willy Tarreau918ff602011-07-25 16:33:49 +0200692 if (p->fe_sps_lim &&
693 (wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) {
694 /* we're blocking because a limit was reached on the number of
695 * requests/s on the frontend. We want to re-check ASAP, which
696 * means in 1 ms before estimated expiration date, because the
697 * timer will have settled down.
698 */
699 next = tick_first(next, tick_add(now_ms, wait));
700 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200701 }
Willy Tarreau918ff602011-07-25 16:33:49 +0200702
703 /* The proxy is not limited so we can re-enable any waiting listener */
704 if (!LIST_ISEMPTY(&p->listener_queue))
705 dequeue_all_listeners(&p->listener_queue);
706 out:
707 t->expire = next;
708 task_queue(t);
709 return t;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200710}
711
712
713/*
714 * this function disables health-check servers so that the process will quickly be ignored
715 * by load balancers. Note that if a proxy was already in the PAUSED state, then its grace
716 * time will not be used since it would already not listen anymore to the socket.
717 */
718void soft_stop(void)
719{
720 struct proxy *p;
Willy Tarreaubbe11b12011-07-25 11:16:24 +0200721 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200722
723 stopping = 1;
724 p = proxy;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +0200725 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200726 while (p) {
727 if (p->state != PR_STSTOPPED) {
Willy Tarreauf8fbcef2008-10-10 17:51:34 +0200728 Warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
729 send_log(p, LOG_WARNING, "Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200730 p->stop_time = tick_add(now_ms, p->grace);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200731 }
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200732 if (p->table.size && p->table.sync_task)
733 task_wakeup(p->table.sync_task, TASK_WOKEN_MSG);
734
Willy Tarreau918ff602011-07-25 16:33:49 +0200735 /* wake every proxy task up so that they can handle the stopping */
Willy Tarreaud1a33e32012-10-04 00:14:33 +0200736 if (p->task)
737 task_wakeup(p->task, TASK_WOKEN_MSG);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200738 p = p->next;
739 }
Willy Tarreaubbe11b12011-07-25 11:16:24 +0200740
741 prs = peers;
742 while (prs) {
743 stop_proxy((struct proxy *)prs->peers_fe);
744 prs = prs->next;
745 }
Willy Tarreaud0807c32010-08-27 18:26:11 +0200746 /* signal zero is used to broadcast the "stopping" event */
747 signal_handler(0);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200748}
749
750
Willy Tarreaube58c382011-07-24 18:28:10 +0200751/* Temporarily disables listening on all of the proxy's listeners. Upon
752 * success, the proxy enters the PR_PAUSED state. If disabling at least one
753 * listener returns an error, then the proxy state is set to PR_STERROR
Willy Tarreauce8fe252011-09-07 19:14:57 +0200754 * because we don't know how to resume from this. The function returns 0
755 * if it fails, or non-zero on success.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200756 */
Willy Tarreauce8fe252011-09-07 19:14:57 +0200757int pause_proxy(struct proxy *p)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200758{
759 struct listener *l;
Willy Tarreauce8fe252011-09-07 19:14:57 +0200760
761 if (!(p->cap & PR_CAP_FE) || p->state == PR_STERROR ||
762 p->state == PR_STSTOPPED || p->state == PR_STPAUSED)
763 return 1;
764
765 Warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
766 send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
767
Willy Tarreau4348fad2012-09-20 16:48:07 +0200768 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreaube58c382011-07-24 18:28:10 +0200769 if (!pause_listener(l))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200770 p->state = PR_STERROR;
771 }
Willy Tarreauce8fe252011-09-07 19:14:57 +0200772
773 if (p->state == PR_STERROR) {
774 Warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
775 send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
776 return 0;
777 }
778
779 p->state = PR_STPAUSED;
780 return 1;
Willy Tarreauda250db2008-10-12 12:07:48 +0200781}
782
783
784/*
785 * This function completely stops a proxy and releases its listeners. It has
786 * to be called when going down in order to release the ports so that another
787 * process may bind to them. It must also be called on disabled proxies at the
788 * end of start-up. When all listeners are closed, the proxy is set to the
789 * PR_STSTOPPED state.
790 */
791void stop_proxy(struct proxy *p)
792{
793 struct listener *l;
794
Willy Tarreau4348fad2012-09-20 16:48:07 +0200795 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauda250db2008-10-12 12:07:48 +0200796 unbind_listener(l);
797 if (l->state >= LI_ASSIGNED) {
798 delete_listener(l);
799 listeners--;
Willy Tarreauaf7ad002010-08-31 15:39:26 +0200800 jobs--;
Willy Tarreauda250db2008-10-12 12:07:48 +0200801 }
802 }
803 p->state = PR_STSTOPPED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200804}
805
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200806/* This function resumes listening on the specified proxy. It scans all of its
807 * listeners and tries to enable them all. If any of them fails, the proxy is
808 * put back to the paused state. It returns 1 upon success, or zero if an error
809 * is encountered.
810 */
811int resume_proxy(struct proxy *p)
812{
813 struct listener *l;
814 int fail;
815
816 if (p->state != PR_STPAUSED)
817 return 1;
818
819 Warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
820 send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
821
822 fail = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +0200823 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200824 if (!resume_listener(l)) {
825 int port;
826
827 port = get_host_port(&l->addr);
828 if (port) {
829 Warning("Port %d busy while trying to enable %s %s.\n",
830 port, proxy_cap_str(p->cap), p->id);
831 send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n",
832 port, proxy_cap_str(p->cap), p->id);
833 }
834 else {
835 Warning("Bind on socket %d busy while trying to enable %s %s.\n",
836 l->luid, proxy_cap_str(p->cap), p->id);
837 send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n",
838 l->luid, proxy_cap_str(p->cap), p->id);
839 }
840
841 /* Another port might have been enabled. Let's stop everything. */
842 fail = 1;
843 break;
844 }
845 }
846
847 p->state = PR_STREADY;
848 if (fail) {
849 pause_proxy(p);
850 return 0;
851 }
852 return 1;
853}
854
Willy Tarreaubaaee002006-06-26 02:48:02 +0200855/*
856 * This function temporarily disables listening so that another new instance
857 * can start listening. It is designed to be called upon reception of a
858 * SIGTTOU, after which either a SIGUSR1 can be sent to completely stop
859 * the proxy, or a SIGTTIN can be sent to listen again.
860 */
861void pause_proxies(void)
862{
863 int err;
864 struct proxy *p;
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200865 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200866
867 err = 0;
868 p = proxy;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +0200869 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200870 while (p) {
Willy Tarreauce8fe252011-09-07 19:14:57 +0200871 err |= !pause_proxy(p);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200872 p = p->next;
873 }
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200874
875 prs = peers;
876 while (prs) {
877 p = prs->peers_fe;
Willy Tarreauce8fe252011-09-07 19:14:57 +0200878 err |= !pause_proxy(p);
879 prs = prs->next;
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200880 }
881
Willy Tarreaubaaee002006-06-26 02:48:02 +0200882 if (err) {
883 Warning("Some proxies refused to pause, performing soft stop now.\n");
884 send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
885 soft_stop();
886 }
887}
888
889
890/*
891 * This function reactivates listening. This can be used after a call to
892 * sig_pause(), for example when a new instance has failed starting up.
893 * It is designed to be called upon reception of a SIGTTIN.
894 */
Willy Tarreaube58c382011-07-24 18:28:10 +0200895void resume_proxies(void)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200896{
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200897 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200898 struct proxy *p;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200899 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200900
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200901 err = 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200902 p = proxy;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +0200903 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200904 while (p) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200905 err |= !resume_proxy(p);
906 p = p->next;
907 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200908
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200909 prs = peers;
910 while (prs) {
911 p = prs->peers_fe;
912 err |= !resume_proxy(p);
913 prs = prs->next;
914 }
Willy Tarreaube58c382011-07-24 18:28:10 +0200915
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200916 if (err) {
917 Warning("Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
918 send_log(p, LOG_WARNING, "Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
Willy Tarreaubaaee002006-06-26 02:48:02 +0200919 }
920}
921
Willy Tarreau87b09662015-04-03 00:22:06 +0200922/* Set current stream's backend to <be>. Nothing is done if the
923 * stream already had a backend assigned, which is indicated by
Willy Tarreaue7dff022015-04-03 01:14:29 +0200924 * s->flags & SF_BE_ASSIGNED.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200925 * All flags, stats and counters which need be updated are updated.
Willy Tarreaubedb9ba2009-07-12 08:27:39 +0200926 * Returns 1 if done, 0 in case of internal error, eg: lack of resource.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200927 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200928int stream_set_backend(struct stream *s, struct proxy *be)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200929{
Willy Tarreaue7dff022015-04-03 01:14:29 +0200930 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreaubedb9ba2009-07-12 08:27:39 +0200931 return 1;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200932 s->be = be;
933 be->beconn++;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100934 if (be->beconn > be->be_counters.conn_max)
935 be->be_counters.conn_max = be->beconn;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200936 proxy_inc_be_ctr(be);
937
Willy Tarreau87b09662015-04-03 00:22:06 +0200938 /* assign new parameters to the stream from the new backend */
Willy Tarreauf27b5ea2009-10-03 22:01:18 +0200939 s->si[1].flags &= ~SI_FL_INDEP_STR;
940 if (be->options2 & PR_O2_INDEPSTR)
941 s->si[1].flags |= SI_FL_INDEP_STR;
942
Willy Tarreau51aecc72009-07-12 09:47:04 +0200943 /* If the target backend requires HTTP processing, we have to allocate
Willy Tarreaueee5b512015-04-03 23:46:31 +0200944 * the HTTP transaction and hdr_idx if we did not have one.
Willy Tarreau51aecc72009-07-12 09:47:04 +0200945 */
Willy Tarreaueee5b512015-04-03 23:46:31 +0200946 if (unlikely(!s->txn && be->http_needed)) {
947 if (unlikely(!http_alloc_txn(s)))
Willy Tarreau51aecc72009-07-12 09:47:04 +0200948 return 0; /* not enough memory */
Willy Tarreau39e4f622010-05-31 17:01:36 +0200949
950 /* and now initialize the HTTP transaction state */
951 http_init_txn(s);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200952 }
953
Willy Tarreaueee5b512015-04-03 23:46:31 +0200954 if (s->txn) {
955 if (be->options2 & PR_O2_RSPBUG_OK)
956 s->txn->rsp.err_pos = -1; /* let buggy responses pass */
Willy Tarreau4e21ff92014-09-30 18:44:22 +0200957
Willy Tarreaueee5b512015-04-03 23:46:31 +0200958 /* If we chain to an HTTP backend running a different HTTP mode, we
959 * have to re-adjust the desired keep-alive/close mode to accommodate
960 * both the frontend's and the backend's modes.
961 */
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200962 if (strm_fe(s)->mode == PR_MODE_HTTP && be->mode == PR_MODE_HTTP &&
963 ((strm_fe(s)->options & PR_O_HTTP_MODE) != (be->options & PR_O_HTTP_MODE)))
Willy Tarreaueee5b512015-04-03 23:46:31 +0200964 http_adjust_conn_mode(s, s->txn, &s->txn->req);
Willy Tarreau80a92c02014-03-12 10:41:13 +0100965
Willy Tarreaueee5b512015-04-03 23:46:31 +0200966 /* If an LB algorithm needs to access some pre-parsed body contents,
967 * we must not start to forward anything until the connection is
968 * confirmed otherwise we'll lose the pointer to these data and
969 * prevent the hash from being doable again after a redispatch.
970 */
971 if (be->mode == PR_MODE_HTTP &&
972 (be->lbprm.algo & (BE_LB_KIND | BE_LB_PARM)) == (BE_LB_KIND_HI | BE_LB_HASH_PRM))
973 s->txn->req.flags |= HTTP_MSGF_WAIT_CONN;
974 }
975
976 s->flags |= SF_BE_ASSIGNED;
Willy Tarreau96e31212011-05-30 18:10:30 +0200977 if (be->options2 & PR_O2_NODELAY) {
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100978 s->req.flags |= CF_NEVER_WAIT;
979 s->res.flags |= CF_NEVER_WAIT;
Willy Tarreau96e31212011-05-30 18:10:30 +0200980 }
981
Willy Tarreauc1a21672009-08-16 22:37:44 +0200982 /* We want to enable the backend-specific analysers except those which
983 * were already run as part of the frontend/listener. Note that it would
984 * be more reliable to store the list of analysers that have been run,
985 * but what we do here is OK for now.
Emeric Brun647caf12009-06-30 17:57:00 +0200986 */
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200987 s->req.analysers |= be->be_req_ana & ~strm_li(s)->analysers;
Emeric Brun647caf12009-06-30 17:57:00 +0200988
Willy Tarreaubedb9ba2009-07-12 08:27:39 +0200989 return 1;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200990}
991
Willy Tarreaudc13c112013-06-21 23:16:39 +0200992static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200993 { CFG_LISTEN, "timeout", proxy_parse_timeout },
994 { CFG_LISTEN, "clitimeout", proxy_parse_timeout },
995 { CFG_LISTEN, "contimeout", proxy_parse_timeout },
996 { CFG_LISTEN, "srvtimeout", proxy_parse_timeout },
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100997 { CFG_LISTEN, "rate-limit", proxy_parse_rate_limit },
Willy Tarreauc35362a2014-04-25 13:58:37 +0200998 { CFG_LISTEN, "max-keep-alive-queue", proxy_parse_max_ka_queue },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200999 { 0, NULL, NULL },
1000}};
1001
1002__attribute__((constructor))
1003static void __proxy_module_init(void)
1004{
1005 cfg_register_keywords(&cfg_kws);
1006}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001007
1008/*
1009 * Local variables:
1010 * c-indent-level: 8
1011 * c-basic-offset: 8
1012 * End:
1013 */