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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>
Emeric Brun5a8c0a92010-09-23 18:44:36 +020044#include <proto/task.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020045
46
Willy Tarreau918ff602011-07-25 16:33:49 +020047int listeners; /* # of proxy listeners, set by cfgparse */
Willy Tarreaubaaee002006-06-26 02:48:02 +020048struct proxy *proxy = NULL; /* list of all existing proxies */
Willy Tarreau53fb4ae2009-10-04 23:04:08 +020049struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */
Willy Tarreauf79d9502014-03-15 07:22:35 +010050struct eb_root proxy_by_name = EB_ROOT; /* tree of proxies sorted by name */
Willy Tarreau10479e42010-12-12 14:00:34 +010051unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */
Willy Tarreaubaaee002006-06-26 02:48:02 +020052
Willy Tarreau977b8e42006-12-29 14:19:17 +010053/*
Willy Tarreau816eb542007-11-04 07:04:43 +010054 * This function returns a string containing a name describing capabilities to
55 * report comprehensible error messages. Specifically, it will return the words
56 * "frontend", "backend", "ruleset" when appropriate, or "proxy" for all other
57 * cases including the proxies declared in "listen" mode.
Willy Tarreau977b8e42006-12-29 14:19:17 +010058 */
Willy Tarreau816eb542007-11-04 07:04:43 +010059const char *proxy_cap_str(int cap)
Willy Tarreau977b8e42006-12-29 14:19:17 +010060{
Willy Tarreau816eb542007-11-04 07:04:43 +010061 if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) {
62 if (cap & PR_CAP_FE)
63 return "frontend";
64 else if (cap & PR_CAP_BE)
65 return "backend";
66 else if (cap & PR_CAP_RS)
67 return "ruleset";
68 }
69 return "proxy";
Willy Tarreau977b8e42006-12-29 14:19:17 +010070}
71
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +010072/*
73 * This function returns a string containing the mode of the proxy in a format
74 * suitable for error messages.
75 */
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +010076const char *proxy_mode_str(int mode) {
77
78 if (mode == PR_MODE_TCP)
79 return "tcp";
80 else if (mode == PR_MODE_HTTP)
81 return "http";
82 else if (mode == PR_MODE_HEALTH)
83 return "health";
84 else
85 return "unknown";
86}
87
Willy Tarreauf3950172009-10-10 18:35:51 +020088/*
89 * This function scans the list of backends and servers to retrieve the first
90 * backend and the first server with the given names, and sets them in both
91 * parameters. It returns zero if either is not found, or non-zero and sets
92 * the ones it did not found to NULL. If a NULL pointer is passed for the
93 * backend, only the pointer to the server will be updated.
94 */
95int get_backend_server(const char *bk_name, const char *sv_name,
96 struct proxy **bk, struct server **sv)
97{
98 struct proxy *p;
99 struct server *s;
Willy Tarreau7ecc4202014-03-15 07:57:11 +0100100 int sid;
Willy Tarreauf3950172009-10-10 18:35:51 +0200101
102 *sv = NULL;
103
Willy Tarreau050536d2012-10-04 08:47:34 +0200104 sid = -1;
Willy Tarreaucfeaa472009-10-10 22:33:08 +0200105 if (*sv_name == '#')
106 sid = atoi(sv_name + 1);
107
Willy Tarreau7ecc4202014-03-15 07:57:11 +0100108 p = findproxy(bk_name, PR_CAP_BE);
Willy Tarreauf3950172009-10-10 18:35:51 +0200109 if (bk)
110 *bk = p;
111 if (!p)
112 return 0;
113
114 for (s = p->srv; s; s = s->next)
Willy Tarreau4055a102012-11-15 00:15:18 +0100115 if ((sid >= 0 && s->puid == sid) ||
116 (sid < 0 && strcmp(s->id, sv_name) == 0))
Willy Tarreauf3950172009-10-10 18:35:51 +0200117 break;
118 *sv = s;
119 if (!s)
120 return 0;
121 return 1;
122}
123
Willy Tarreaue219db72007-12-03 01:30:13 +0100124/* This function parses a "timeout" statement in a proxy section. It returns
125 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200126 * return zero, it will write an error or warning message into a preallocated
127 * buffer returned at <err>. The trailing is not be written. The function must
128 * be called with <args> pointing to the first command line word, with <proxy>
129 * pointing to the proxy being parsed, and <defpx> to the default proxy or NULL.
130 * As a special case for compatibility with older configs, it also accepts
131 * "{cli|srv|con}timeout" in args[0].
Willy Tarreaue219db72007-12-03 01:30:13 +0100132 */
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200133static int proxy_parse_timeout(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200134 struct proxy *defpx, const char *file, int line,
135 char **err)
Willy Tarreaue219db72007-12-03 01:30:13 +0100136{
137 unsigned timeout;
138 int retval, cap;
139 const char *res, *name;
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200140 int *tv = NULL;
141 int *td = NULL;
Willy Tarreaued446492014-04-28 22:56:38 +0200142 int warn = 0;
Willy Tarreaue219db72007-12-03 01:30:13 +0100143
144 retval = 0;
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200145
146 /* simply skip "timeout" but remain compatible with old form */
147 if (strcmp(args[0], "timeout") == 0)
148 args++;
149
Willy Tarreaue219db72007-12-03 01:30:13 +0100150 name = args[0];
Willy Tarreaued446492014-04-28 22:56:38 +0200151 if (!strcmp(args[0], "client") || (!strcmp(args[0], "clitimeout") && (warn = WARN_CLITO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100152 name = "client";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100153 tv = &proxy->timeout.client;
154 td = &defpx->timeout.client;
Willy Tarreaue219db72007-12-03 01:30:13 +0100155 cap = PR_CAP_FE;
156 } else if (!strcmp(args[0], "tarpit")) {
157 tv = &proxy->timeout.tarpit;
158 td = &defpx->timeout.tarpit;
Willy Tarreau51c9bde2008-01-06 13:40:03 +0100159 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100160 } else if (!strcmp(args[0], "http-keep-alive")) {
161 tv = &proxy->timeout.httpka;
162 td = &defpx->timeout.httpka;
163 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreau036fae02008-01-06 13:24:40 +0100164 } else if (!strcmp(args[0], "http-request")) {
165 tv = &proxy->timeout.httpreq;
166 td = &defpx->timeout.httpreq;
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200167 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaued446492014-04-28 22:56:38 +0200168 } else if (!strcmp(args[0], "server") || (!strcmp(args[0], "srvtimeout") && (warn = WARN_SRVTO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100169 name = "server";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100170 tv = &proxy->timeout.server;
171 td = &defpx->timeout.server;
Willy Tarreaue219db72007-12-03 01:30:13 +0100172 cap = PR_CAP_BE;
Willy Tarreaued446492014-04-28 22:56:38 +0200173 } else if (!strcmp(args[0], "connect") || (!strcmp(args[0], "contimeout") && (warn = WARN_CONTO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100174 name = "connect";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100175 tv = &proxy->timeout.connect;
176 td = &defpx->timeout.connect;
Willy Tarreaue219db72007-12-03 01:30:13 +0100177 cap = PR_CAP_BE;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100178 } else if (!strcmp(args[0], "check")) {
179 tv = &proxy->timeout.check;
180 td = &defpx->timeout.check;
181 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100182 } else if (!strcmp(args[0], "queue")) {
183 tv = &proxy->timeout.queue;
184 td = &defpx->timeout.queue;
185 cap = PR_CAP_BE;
Willy Tarreauce887fd2012-05-12 12:50:00 +0200186 } else if (!strcmp(args[0], "tunnel")) {
187 tv = &proxy->timeout.tunnel;
188 td = &defpx->timeout.tunnel;
189 cap = PR_CAP_BE;
Willy Tarreau05cdd962014-05-10 14:30:07 +0200190 } else if (!strcmp(args[0], "client-fin")) {
191 tv = &proxy->timeout.clientfin;
192 td = &defpx->timeout.clientfin;
193 cap = PR_CAP_FE;
194 } else if (!strcmp(args[0], "server-fin")) {
195 tv = &proxy->timeout.serverfin;
196 td = &defpx->timeout.serverfin;
197 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100198 } else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200199 memprintf(err,
200 "'timeout' supports 'client', 'server', 'connect', 'check', "
Willy Tarreau05cdd962014-05-10 14:30:07 +0200201 "'queue', 'http-keep-alive', 'http-request', 'tunnel', 'tarpit', "
202 "'client-fin' and 'server-fin' (got '%s')",
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200203 args[0]);
Willy Tarreaue219db72007-12-03 01:30:13 +0100204 return -1;
205 }
206
207 if (*args[1] == 0) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200208 memprintf(err, "'timeout %s' expects an integer value (in milliseconds)", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100209 return -1;
210 }
211
212 res = parse_time_err(args[1], &timeout, TIME_UNIT_MS);
213 if (res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200214 memprintf(err, "unexpected character '%c' in 'timeout %s'", *res, name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100215 return -1;
216 }
217
218 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200219 memprintf(err, "'timeout %s' will be ignored because %s '%s' has no %s capability",
220 name, proxy_type_str(proxy), proxy->id,
221 (cap & PR_CAP_BE) ? "backend" : "frontend");
Willy Tarreaue219db72007-12-03 01:30:13 +0100222 retval = 1;
223 }
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200224 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200225 memprintf(err, "overwriting 'timeout %s' which was already specified", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100226 retval = 1;
227 }
Willy Tarreaued446492014-04-28 22:56:38 +0200228 else if (warn) {
229 if (!already_warned(warn)) {
230 memprintf(err, "the '%s' directive is now deprecated in favor of 'timeout %s', and will not be supported in future versions.",
231 args[0], name);
232 retval = 1;
233 }
234 }
Willy Tarreaue219db72007-12-03 01:30:13 +0100235
Willy Tarreaufac5b592014-05-22 08:24:46 +0200236 if (*args[2] != 0) {
237 memprintf(err, "'timeout %s' : unexpected extra argument '%s' after value '%s'.", name, args[2], args[1]);
238 retval = -1;
239 }
240
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200241 *tv = MS_TO_TICKS(timeout);
Willy Tarreaue219db72007-12-03 01:30:13 +0100242 return retval;
243}
244
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100245/* This function parses a "rate-limit" statement in a proxy section. It returns
246 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200247 * return zero, it will write an error or warning message into a preallocated
248 * buffer returned at <err>. The function must be called with <args> pointing
249 * to the first command line word, with <proxy> pointing to the proxy being
250 * parsed, and <defpx> to the default proxy or NULL.
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100251 */
252static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200253 struct proxy *defpx, const char *file, int line,
254 char **err)
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100255{
256 int retval, cap;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200257 char *res;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100258 unsigned int *tv = NULL;
259 unsigned int *td = NULL;
260 unsigned int val;
261
262 retval = 0;
263
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200264 if (strcmp(args[1], "sessions") == 0) {
Willy Tarreau13a34bd2009-05-10 18:52:49 +0200265 tv = &proxy->fe_sps_lim;
266 td = &defpx->fe_sps_lim;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100267 cap = PR_CAP_FE;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200268 }
269 else {
270 memprintf(err, "'%s' only supports 'sessions' (got '%s')", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100271 return -1;
272 }
273
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200274 if (*args[2] == 0) {
275 memprintf(err, "'%s %s' expects expects an integer value (in sessions/second)", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100276 return -1;
277 }
278
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200279 val = strtoul(args[2], &res, 0);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100280 if (*res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200281 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 +0100282 return -1;
283 }
284
285 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200286 memprintf(err, "%s %s will be ignored because %s '%s' has no %s capability",
287 args[0], args[1], proxy_type_str(proxy), proxy->id,
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100288 (cap & PR_CAP_BE) ? "backend" : "frontend");
289 retval = 1;
290 }
291 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200292 memprintf(err, "overwriting %s %s which was already specified", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100293 retval = 1;
294 }
295
296 *tv = val;
297 return retval;
298}
299
Willy Tarreauc35362a2014-04-25 13:58:37 +0200300/* This function parses a "max-keep-alive-queue" statement in a proxy section.
301 * It returns -1 if there is any error, 1 for a warning, otherwise zero. If it
302 * does not return zero, it will write an error or warning message into a
303 * preallocated buffer returned at <err>. The function must be called with
304 * <args> pointing to the first command line word, with <proxy> pointing to
305 * the proxy being parsed, and <defpx> to the default proxy or NULL.
306 */
307static int proxy_parse_max_ka_queue(char **args, int section, struct proxy *proxy,
308 struct proxy *defpx, const char *file, int line,
309 char **err)
310{
311 int retval;
312 char *res;
313 unsigned int val;
314
315 retval = 0;
316
317 if (*args[1] == 0) {
318 memprintf(err, "'%s' expects expects an integer value (or -1 to disable)", args[0]);
319 return -1;
320 }
321
322 val = strtol(args[1], &res, 0);
323 if (*res) {
324 memprintf(err, "'%s' : unexpected character '%c' in integer value '%s'", args[0], *res, args[1]);
325 return -1;
326 }
327
328 if (!(proxy->cap & PR_CAP_BE)) {
329 memprintf(err, "%s will be ignored because %s '%s' has no backend capability",
330 args[0], proxy_type_str(proxy), proxy->id);
331 retval = 1;
332 }
333
334 /* we store <val+1> so that a user-facing value of -1 is stored as zero (default) */
335 proxy->max_ka_queue = val + 1;
336 return retval;
337}
338
Willy Tarreauf79d9502014-03-15 07:22:35 +0100339/* This function inserts proxy <px> into the tree of known proxies. The proxy's
340 * name is used as the storing key so it must already have been initialized.
341 */
342void proxy_store_name(struct proxy *px)
343{
344 px->conf.by_name.key = px->id;
345 ebis_insert(&proxy_by_name, &px->conf.by_name);
346}
347
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100348/*
349 * This function finds a proxy with matching name, mode and with satisfying
350 * capabilities. It also checks if there are more matching proxies with
351 * requested name as this often leads into unexpected situations.
352 */
353
Alex Williams96532db2009-11-01 21:27:13 -0500354struct proxy *findproxy_mode(const char *name, int mode, int cap) {
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100355
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100356 struct proxy *curproxy, *target = NULL;
Willy Tarreauf79d9502014-03-15 07:22:35 +0100357 struct ebpt_node *node;
358
359 for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
360 curproxy = container_of(node, struct proxy, conf.by_name);
361
362 if (strcmp(curproxy->id, name) != 0)
363 break;
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100364
Willy Tarreauf79d9502014-03-15 07:22:35 +0100365 if ((curproxy->cap & cap) != cap)
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100366 continue;
367
Willy Tarreau51aecc72009-07-12 09:47:04 +0200368 if (curproxy->mode != mode &&
369 !(curproxy->mode == PR_MODE_HTTP && mode == PR_MODE_TCP)) {
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100370 Alert("Unable to use proxy '%s' with wrong mode, required: %s, has: %s.\n",
371 name, proxy_mode_str(mode), proxy_mode_str(curproxy->mode));
372 Alert("You may want to use 'mode %s'.\n", proxy_mode_str(mode));
373 return NULL;
374 }
375
376 if (!target) {
377 target = curproxy;
378 continue;
379 }
380
Willy Tarreau816eb542007-11-04 07:04:43 +0100381 Alert("Refusing to use duplicated proxy '%s' with overlapping capabilities: %s/%s!\n",
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100382 name, proxy_type_str(curproxy), proxy_type_str(target));
383
384 return NULL;
385 }
386
387 return target;
388}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200389
Willy Tarreaubc216c42011-08-02 11:25:54 +0200390/* Returns a pointer to the proxy matching either name <name>, or id <name> if
391 * <name> begins with a '#'. NULL is returned if no match is found, as well as
392 * if multiple matches are found (eg: too large capabilities mask).
393 */
Alex Williams96532db2009-11-01 21:27:13 -0500394struct proxy *findproxy(const char *name, int cap) {
395
396 struct proxy *curproxy, *target = NULL;
Willy Tarreau050536d2012-10-04 08:47:34 +0200397 int pid = -1;
Willy Tarreaubc216c42011-08-02 11:25:54 +0200398
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100399 if (*name == '#') {
400 struct eb32_node *node;
401
Willy Tarreaubc216c42011-08-02 11:25:54 +0200402 pid = atoi(name + 1);
Alex Williams96532db2009-11-01 21:27:13 -0500403
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100404 for (node = eb32_lookup(&used_proxy_id, pid); node; node = eb32_next(node)) {
405 curproxy = container_of(node, struct proxy, conf.id);
Alex Williams96532db2009-11-01 21:27:13 -0500406
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100407 if (curproxy->uuid != pid)
408 break;
409
410 if ((curproxy->cap & cap) != cap)
411 continue;
412
413 if (target)
414 return NULL;
415
Alex Williams96532db2009-11-01 21:27:13 -0500416 target = curproxy;
Alex Williams96532db2009-11-01 21:27:13 -0500417 }
Alex Williams96532db2009-11-01 21:27:13 -0500418 }
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100419 else {
420 struct ebpt_node *node;
421
422 for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
423 curproxy = container_of(node, struct proxy, conf.by_name);
Alex Williams96532db2009-11-01 21:27:13 -0500424
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100425 if (strcmp(curproxy->id, name) != 0)
426 break;
427
428 if ((curproxy->cap & cap) != cap)
429 continue;
430
431 if (target)
432 return NULL;
433
434 target = curproxy;
435 }
436 }
Alex Williams96532db2009-11-01 21:27:13 -0500437 return target;
438}
439
Willy Tarreaubaaee002006-06-26 02:48:02 +0200440/*
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100441 * This function finds a server with matching name within selected proxy.
442 * It also checks if there are more matching servers with
443 * requested name as this often leads into unexpected situations.
444 */
445
446struct server *findserver(const struct proxy *px, const char *name) {
447
448 struct server *cursrv, *target = NULL;
449
450 if (!px)
451 return NULL;
452
453 for (cursrv = px->srv; cursrv; cursrv = cursrv->next) {
454 if (strcmp(cursrv->id, name))
455 continue;
456
457 if (!target) {
458 target = cursrv;
459 continue;
460 }
461
Cyril Bonté0bb519e2012-04-04 12:57:19 +0200462 Alert("Refusing to use duplicated server '%s' found in proxy: %s!\n",
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100463 name, px->id);
464
465 return NULL;
466 }
467
468 return target;
469}
470
Willy Tarreauff01a212009-03-15 13:46:16 +0100471/* This function checks that the designated proxy has no http directives
472 * enabled. It will output a warning if there are, and will fix some of them.
473 * It returns the number of fatal errors encountered. This should be called
474 * at the end of the configuration parsing if the proxy is not in http mode.
475 * The <file> argument is used to construct the error message.
476 */
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200477int proxy_cfg_ensure_no_http(struct proxy *curproxy)
Willy Tarreauff01a212009-03-15 13:46:16 +0100478{
479 if (curproxy->cookie_name != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200480 Warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n",
481 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100482 }
483 if (curproxy->rsp_exp != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200484 Warning("config : server regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
485 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100486 }
487 if (curproxy->req_exp != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200488 Warning("config : client regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
489 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100490 }
491 if (curproxy->monitor_uri != NULL) {
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200492 Warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n",
493 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100494 }
Willy Tarreauf3e49f92009-10-03 12:21:20 +0200495 if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) {
Willy Tarreauff01a212009-03-15 13:46:16 +0100496 curproxy->lbprm.algo &= ~BE_LB_ALGO;
497 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200498 Warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n",
499 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100500 }
Willy Tarreau17804162009-11-09 21:27:51 +0100501 if (curproxy->to_log & (LW_REQ | LW_RESP)) {
502 curproxy->to_log &= ~(LW_REQ | LW_RESP);
Willy Tarreau59ad1a22014-01-29 14:39:58 +0100503 Warning("parsing [%s:%d] : HTTP log/header format not usable with %s '%s' (needs 'mode http').\n",
Willy Tarreaub1f3af22013-04-12 18:30:32 +0200504 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
Willy Tarreau17804162009-11-09 21:27:51 +0100505 proxy_type_str(curproxy), curproxy->id);
506 }
Willy Tarreau62a61232013-04-12 18:13:46 +0200507 if (curproxy->conf.logformat_string == default_http_log_format ||
508 curproxy->conf.logformat_string == clf_http_log_format) {
509 /* Note: we don't change the directive's file:line number */
510 curproxy->conf.logformat_string = default_tcp_log_format;
511 Warning("parsing [%s:%d] : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n",
512 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
Willy Tarreau196729e2012-05-31 19:30:26 +0200513 proxy_type_str(curproxy), curproxy->id);
514 }
515
Willy Tarreauff01a212009-03-15 13:46:16 +0100516 return 0;
517}
518
Willy Tarreau237250c2011-07-29 01:49:03 +0200519/* Perform the most basic initialization of a proxy :
520 * memset(), list_init(*), reset_timeouts(*).
Willy Tarreaub249e842011-09-07 18:41:08 +0200521 * Any new proxy or peer should be initialized via this function.
Willy Tarreau237250c2011-07-29 01:49:03 +0200522 */
523void init_new_proxy(struct proxy *p)
524{
525 memset(p, 0, sizeof(struct proxy));
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100526 p->obj_type = OBJ_TYPE_PROXY;
Willy Tarreau237250c2011-07-29 01:49:03 +0200527 LIST_INIT(&p->pendconns);
528 LIST_INIT(&p->acl);
529 LIST_INIT(&p->http_req_rules);
Willy Tarreaue365c0b2013-06-11 16:06:12 +0200530 LIST_INIT(&p->http_res_rules);
Willy Tarreau353bc9f2014-04-28 22:05:31 +0200531 LIST_INIT(&p->block_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200532 LIST_INIT(&p->redirect_rules);
533 LIST_INIT(&p->mon_fail_cond);
534 LIST_INIT(&p->switching_rules);
Willy Tarreau4a5cade2012-04-05 21:09:48 +0200535 LIST_INIT(&p->server_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200536 LIST_INIT(&p->persist_rules);
537 LIST_INIT(&p->sticking_rules);
538 LIST_INIT(&p->storersp_rules);
539 LIST_INIT(&p->tcp_req.inspect_rules);
540 LIST_INIT(&p->tcp_rep.inspect_rules);
541 LIST_INIT(&p->tcp_req.l4_rules);
542 LIST_INIT(&p->req_add);
543 LIST_INIT(&p->rsp_add);
544 LIST_INIT(&p->listener_queue);
William Lallemand0f99e342011-10-12 17:50:54 +0200545 LIST_INIT(&p->logsrvs);
William Lallemand723b73a2012-02-08 16:37:49 +0100546 LIST_INIT(&p->logformat);
William Lallemanda73203e2012-03-12 12:48:57 +0100547 LIST_INIT(&p->format_unique_id);
Willy Tarreau2a65ff02012-09-13 17:54:29 +0200548 LIST_INIT(&p->conf.bind);
Willy Tarreau4348fad2012-09-20 16:48:07 +0200549 LIST_INIT(&p->conf.listeners);
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200550 LIST_INIT(&p->conf.args.list);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200551 LIST_INIT(&p->tcpcheck_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200552
553 /* Timeouts are defined as -1 */
554 proxy_reset_timeouts(p);
555 p->tcp_rep.inspect_delay = TICK_ETERNITY;
Willy Tarreau050536d2012-10-04 08:47:34 +0200556
557 /* initial uuid is unassigned (-1) */
558 p->uuid = -1;
Willy Tarreau237250c2011-07-29 01:49:03 +0200559}
560
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100561/*
Willy Tarreau2ff76222007-04-09 19:29:56 +0200562 * This function creates all proxy sockets. It should be done very early,
563 * typically before privileges are dropped. The sockets will be registered
564 * but not added to any fd_set, in order not to loose them across the fork().
Willy Tarreau562515c2011-07-25 08:11:52 +0200565 * The proxies also start in READY state because they all have their listeners
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200566 * bound.
Willy Tarreau2ff76222007-04-09 19:29:56 +0200567 *
568 * Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
569 * Retryable errors will only be printed if <verbose> is not zero.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200570 */
571int start_proxies(int verbose)
572{
573 struct proxy *curproxy;
574 struct listener *listener;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100575 int lerr, err = ERR_NONE;
576 int pxerr;
577 char msg[100];
Willy Tarreaubaaee002006-06-26 02:48:02 +0200578
579 for (curproxy = proxy; curproxy != NULL; curproxy = curproxy->next) {
580 if (curproxy->state != PR_STNEW)
581 continue; /* already initialized */
582
583 pxerr = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +0200584 list_for_each_entry(listener, &curproxy->conf.listeners, by_fe) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100585 if (listener->state != LI_ASSIGNED)
586 continue; /* already started */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200587
Emeric Bruncf20bf12010-10-22 16:06:11 +0200588 lerr = listener->proto->bind(listener, msg, sizeof(msg));
Willy Tarreaubaaee002006-06-26 02:48:02 +0200589
Willy Tarreaue6b98942007-10-29 01:09:36 +0100590 /* errors are reported if <verbose> is set or if they are fatal */
591 if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) {
592 if (lerr & ERR_ALERT)
593 Alert("Starting %s %s: %s\n",
594 proxy_type_str(curproxy), curproxy->id, msg);
595 else if (lerr & ERR_WARN)
596 Warning("Starting %s %s: %s\n",
597 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200598 }
599
Willy Tarreaue6b98942007-10-29 01:09:36 +0100600 err |= lerr;
601 if (lerr & (ERR_ABORT | ERR_FATAL)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200602 pxerr |= 1;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100603 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200604 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100605 else if (lerr & ERR_CODE) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200606 pxerr |= 1;
607 continue;
608 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200609 }
610
611 if (!pxerr) {
Willy Tarreau562515c2011-07-25 08:11:52 +0200612 curproxy->state = PR_STREADY;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200613 send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id);
614 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100615
616 if (err & ERR_ABORT)
617 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200618 }
619
620 return err;
621}
622
623
624/*
Willy Tarreau918ff602011-07-25 16:33:49 +0200625 * This is the proxy management task. It enables proxies when there are enough
626 * free sessions, or stops them when the table is full. It is designed to be
627 * called as a task which is woken up upon stopping or when rate limiting must
628 * be enforced.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200629 */
Willy Tarreau918ff602011-07-25 16:33:49 +0200630struct task *manage_proxy(struct task *t)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200631{
Willy Tarreau918ff602011-07-25 16:33:49 +0200632 struct proxy *p = t->context;
633 int next = TICK_ETERNITY;
Willy Tarreau79584222009-03-06 09:18:27 +0100634 unsigned int wait;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200635
Willy Tarreau918ff602011-07-25 16:33:49 +0200636 /* We should periodically try to enable listeners waiting for a
637 * global resource here.
638 */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200639
Willy Tarreau918ff602011-07-25 16:33:49 +0200640 /* first, let's check if we need to stop the proxy */
641 if (unlikely(stopping && p->state != PR_STSTOPPED)) {
642 int t;
643 t = tick_remain(now_ms, p->stop_time);
644 if (t == 0) {
645 Warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
646 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
647 send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
648 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
649 stop_proxy(p);
650 /* try to free more memory */
651 pool_gc2();
652 }
653 else {
654 next = tick_first(next, p->stop_time);
655 }
656 }
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200657
Willy Tarreau3a925c12013-09-04 17:54:01 +0200658 /* If the proxy holds a stick table, we need to purge all unused
659 * entries. These are all the ones in the table with ref_cnt == 0
660 * and all the ones in the pool used to allocate new entries. Any
661 * entry attached to an existing session waiting for a store will
662 * be in neither list. Any entry being dumped will have ref_cnt > 0.
663 * However we protect tables that are being synced to peers.
664 */
665 if (unlikely(stopping && p->state == PR_STSTOPPED && p->table.current)) {
666 if (!p->table.syncing) {
667 stktable_trash_oldest(&p->table, p->table.current);
668 pool_gc2();
669 }
670 if (p->table.current) {
671 /* some entries still remain, let's recheck in one second */
672 next = tick_first(next, tick_add(now_ms, 1000));
673 }
674 }
675
Willy Tarreau918ff602011-07-25 16:33:49 +0200676 /* the rest below is just for frontends */
677 if (!(p->cap & PR_CAP_FE))
678 goto out;
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200679
Willy Tarreau918ff602011-07-25 16:33:49 +0200680 /* check the various reasons we may find to block the frontend */
681 if (unlikely(p->feconn >= p->maxconn)) {
682 if (p->state == PR_STREADY)
683 p->state = PR_STFULL;
684 goto out;
685 }
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100686
Willy Tarreau918ff602011-07-25 16:33:49 +0200687 /* OK we have no reason to block, so let's unblock if we were blocking */
688 if (p->state == PR_STFULL)
689 p->state = PR_STREADY;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100690
Willy Tarreau918ff602011-07-25 16:33:49 +0200691 if (p->fe_sps_lim &&
692 (wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) {
693 /* we're blocking because a limit was reached on the number of
694 * requests/s on the frontend. We want to re-check ASAP, which
695 * means in 1 ms before estimated expiration date, because the
696 * timer will have settled down.
697 */
698 next = tick_first(next, tick_add(now_ms, wait));
699 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200700 }
Willy Tarreau918ff602011-07-25 16:33:49 +0200701
702 /* The proxy is not limited so we can re-enable any waiting listener */
703 if (!LIST_ISEMPTY(&p->listener_queue))
704 dequeue_all_listeners(&p->listener_queue);
705 out:
706 t->expire = next;
707 task_queue(t);
708 return t;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200709}
710
711
712/*
713 * this function disables health-check servers so that the process will quickly be ignored
714 * by load balancers. Note that if a proxy was already in the PAUSED state, then its grace
715 * time will not be used since it would already not listen anymore to the socket.
716 */
717void soft_stop(void)
718{
719 struct proxy *p;
Willy Tarreaubbe11b12011-07-25 11:16:24 +0200720 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200721
722 stopping = 1;
723 p = proxy;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +0200724 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200725 while (p) {
726 if (p->state != PR_STSTOPPED) {
Willy Tarreauf8fbcef2008-10-10 17:51:34 +0200727 Warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
728 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 +0200729 p->stop_time = tick_add(now_ms, p->grace);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200730 }
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200731 if (p->table.size && p->table.sync_task)
732 task_wakeup(p->table.sync_task, TASK_WOKEN_MSG);
733
Willy Tarreau918ff602011-07-25 16:33:49 +0200734 /* wake every proxy task up so that they can handle the stopping */
Willy Tarreaud1a33e32012-10-04 00:14:33 +0200735 if (p->task)
736 task_wakeup(p->task, TASK_WOKEN_MSG);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200737 p = p->next;
738 }
Willy Tarreaubbe11b12011-07-25 11:16:24 +0200739
740 prs = peers;
741 while (prs) {
742 stop_proxy((struct proxy *)prs->peers_fe);
743 prs = prs->next;
744 }
Willy Tarreaud0807c32010-08-27 18:26:11 +0200745 /* signal zero is used to broadcast the "stopping" event */
746 signal_handler(0);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200747}
748
749
Willy Tarreaube58c382011-07-24 18:28:10 +0200750/* Temporarily disables listening on all of the proxy's listeners. Upon
751 * success, the proxy enters the PR_PAUSED state. If disabling at least one
752 * listener returns an error, then the proxy state is set to PR_STERROR
Willy Tarreauce8fe252011-09-07 19:14:57 +0200753 * because we don't know how to resume from this. The function returns 0
754 * if it fails, or non-zero on success.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200755 */
Willy Tarreauce8fe252011-09-07 19:14:57 +0200756int pause_proxy(struct proxy *p)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200757{
758 struct listener *l;
Willy Tarreauce8fe252011-09-07 19:14:57 +0200759
760 if (!(p->cap & PR_CAP_FE) || p->state == PR_STERROR ||
761 p->state == PR_STSTOPPED || p->state == PR_STPAUSED)
762 return 1;
763
764 Warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
765 send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
766
Willy Tarreau4348fad2012-09-20 16:48:07 +0200767 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreaube58c382011-07-24 18:28:10 +0200768 if (!pause_listener(l))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200769 p->state = PR_STERROR;
770 }
Willy Tarreauce8fe252011-09-07 19:14:57 +0200771
772 if (p->state == PR_STERROR) {
773 Warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
774 send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
775 return 0;
776 }
777
778 p->state = PR_STPAUSED;
779 return 1;
Willy Tarreauda250db2008-10-12 12:07:48 +0200780}
781
782
783/*
784 * This function completely stops a proxy and releases its listeners. It has
785 * to be called when going down in order to release the ports so that another
786 * process may bind to them. It must also be called on disabled proxies at the
787 * end of start-up. When all listeners are closed, the proxy is set to the
788 * PR_STSTOPPED state.
789 */
790void stop_proxy(struct proxy *p)
791{
792 struct listener *l;
793
Willy Tarreau4348fad2012-09-20 16:48:07 +0200794 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauda250db2008-10-12 12:07:48 +0200795 unbind_listener(l);
796 if (l->state >= LI_ASSIGNED) {
797 delete_listener(l);
798 listeners--;
Willy Tarreauaf7ad002010-08-31 15:39:26 +0200799 jobs--;
Willy Tarreauda250db2008-10-12 12:07:48 +0200800 }
801 }
802 p->state = PR_STSTOPPED;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200803}
804
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200805/* This function resumes listening on the specified proxy. It scans all of its
806 * listeners and tries to enable them all. If any of them fails, the proxy is
807 * put back to the paused state. It returns 1 upon success, or zero if an error
808 * is encountered.
809 */
810int resume_proxy(struct proxy *p)
811{
812 struct listener *l;
813 int fail;
814
815 if (p->state != PR_STPAUSED)
816 return 1;
817
818 Warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
819 send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
820
821 fail = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +0200822 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200823 if (!resume_listener(l)) {
824 int port;
825
826 port = get_host_port(&l->addr);
827 if (port) {
828 Warning("Port %d busy while trying to enable %s %s.\n",
829 port, proxy_cap_str(p->cap), p->id);
830 send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n",
831 port, proxy_cap_str(p->cap), p->id);
832 }
833 else {
834 Warning("Bind on socket %d busy while trying to enable %s %s.\n",
835 l->luid, proxy_cap_str(p->cap), p->id);
836 send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n",
837 l->luid, proxy_cap_str(p->cap), p->id);
838 }
839
840 /* Another port might have been enabled. Let's stop everything. */
841 fail = 1;
842 break;
843 }
844 }
845
846 p->state = PR_STREADY;
847 if (fail) {
848 pause_proxy(p);
849 return 0;
850 }
851 return 1;
852}
853
Willy Tarreaubaaee002006-06-26 02:48:02 +0200854/*
855 * This function temporarily disables listening so that another new instance
856 * can start listening. It is designed to be called upon reception of a
857 * SIGTTOU, after which either a SIGUSR1 can be sent to completely stop
858 * the proxy, or a SIGTTIN can be sent to listen again.
859 */
860void pause_proxies(void)
861{
862 int err;
863 struct proxy *p;
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200864 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200865
866 err = 0;
867 p = proxy;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +0200868 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200869 while (p) {
Willy Tarreauce8fe252011-09-07 19:14:57 +0200870 err |= !pause_proxy(p);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200871 p = p->next;
872 }
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200873
874 prs = peers;
875 while (prs) {
876 p = prs->peers_fe;
Willy Tarreauce8fe252011-09-07 19:14:57 +0200877 err |= !pause_proxy(p);
878 prs = prs->next;
Emeric Brun5a8c0a92010-09-23 18:44:36 +0200879 }
880
Willy Tarreaubaaee002006-06-26 02:48:02 +0200881 if (err) {
882 Warning("Some proxies refused to pause, performing soft stop now.\n");
883 send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
884 soft_stop();
885 }
886}
887
888
889/*
890 * This function reactivates listening. This can be used after a call to
891 * sig_pause(), for example when a new instance has failed starting up.
892 * It is designed to be called upon reception of a SIGTTIN.
893 */
Willy Tarreaube58c382011-07-24 18:28:10 +0200894void resume_proxies(void)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200895{
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200896 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200897 struct proxy *p;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200898 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200899
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200900 err = 0;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200901 p = proxy;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +0200902 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200903 while (p) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200904 err |= !resume_proxy(p);
905 p = p->next;
906 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200907
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200908 prs = peers;
909 while (prs) {
910 p = prs->peers_fe;
911 err |= !resume_proxy(p);
912 prs = prs->next;
913 }
Willy Tarreaube58c382011-07-24 18:28:10 +0200914
Willy Tarreauc03ebbf2011-09-07 21:33:14 +0200915 if (err) {
916 Warning("Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
917 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 +0200918 }
919}
920
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200921/* Set current session's backend to <be>. Nothing is done if the
922 * session already had a backend assigned, which is indicated by
923 * s->flags & SN_BE_ASSIGNED.
924 * All flags, stats and counters which need be updated are updated.
Willy Tarreaubedb9ba2009-07-12 08:27:39 +0200925 * Returns 1 if done, 0 in case of internal error, eg: lack of resource.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200926 */
Willy Tarreaubedb9ba2009-07-12 08:27:39 +0200927int session_set_backend(struct session *s, struct proxy *be)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200928{
929 if (s->flags & SN_BE_ASSIGNED)
Willy Tarreaubedb9ba2009-07-12 08:27:39 +0200930 return 1;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200931 s->be = be;
932 be->beconn++;
Willy Tarreau7d0aaf32011-03-10 23:25:56 +0100933 if (be->beconn > be->be_counters.conn_max)
934 be->be_counters.conn_max = be->beconn;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200935 proxy_inc_be_ctr(be);
936
937 /* assign new parameters to the session from the new backend */
Willy Tarreauf27b5ea2009-10-03 22:01:18 +0200938 s->si[1].flags &= ~SI_FL_INDEP_STR;
939 if (be->options2 & PR_O2_INDEPSTR)
940 s->si[1].flags |= SI_FL_INDEP_STR;
941
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200942 if (be->options2 & PR_O2_RSPBUG_OK)
943 s->txn.rsp.err_pos = -1; /* let buggy responses pass */
944 s->flags |= SN_BE_ASSIGNED;
Willy Tarreau51aecc72009-07-12 09:47:04 +0200945
946 /* If the target backend requires HTTP processing, we have to allocate
947 * a struct hdr_idx for it if we did not have one.
948 */
Willy Tarreau25320b22013-03-24 07:22:08 +0100949 if (unlikely(!s->txn.hdr_idx.v && be->http_needed)) {
Willy Tarreauf767ac52014-04-28 16:13:51 +0200950 s->txn.hdr_idx.size = global.tune.max_http_hdr;
Willy Tarreau34eb6712011-10-24 18:15:04 +0200951 if ((s->txn.hdr_idx.v = pool_alloc2(pool2_hdr_idx)) == NULL)
Willy Tarreau51aecc72009-07-12 09:47:04 +0200952 return 0; /* not enough memory */
Willy Tarreau39e4f622010-05-31 17:01:36 +0200953
954 /* and now initialize the HTTP transaction state */
955 http_init_txn(s);
Willy Tarreau51aecc72009-07-12 09:47:04 +0200956 }
957
Willy Tarreau4e21ff92014-09-30 18:44:22 +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 */
962 if (s->fe->mode == PR_MODE_HTTP && be->mode == PR_MODE_HTTP &&
963 ((s->fe->options & PR_O_HTTP_MODE) != (be->options & PR_O_HTTP_MODE)))
964 http_adjust_conn_mode(s, &s->txn, &s->txn.req);
965
Willy Tarreau80a92c02014-03-12 10:41:13 +0100966 /* 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
Willy Tarreau96e31212011-05-30 18:10:30 +0200975 if (be->options2 & PR_O2_NODELAY) {
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100976 s->req.flags |= CF_NEVER_WAIT;
977 s->res.flags |= CF_NEVER_WAIT;
Willy Tarreau96e31212011-05-30 18:10:30 +0200978 }
979
Willy Tarreauc1a21672009-08-16 22:37:44 +0200980 /* We want to enable the backend-specific analysers except those which
981 * were already run as part of the frontend/listener. Note that it would
982 * be more reliable to store the list of analysers that have been run,
983 * but what we do here is OK for now.
Emeric Brun647caf12009-06-30 17:57:00 +0200984 */
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100985 s->req.analysers |= be->be_req_ana & ~(s->listener->analysers);
Emeric Brun647caf12009-06-30 17:57:00 +0200986
Willy Tarreaubedb9ba2009-07-12 08:27:39 +0200987 return 1;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +0200988}
989
Willy Tarreaudc13c112013-06-21 23:16:39 +0200990static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200991 { CFG_LISTEN, "timeout", proxy_parse_timeout },
992 { CFG_LISTEN, "clitimeout", proxy_parse_timeout },
993 { CFG_LISTEN, "contimeout", proxy_parse_timeout },
994 { CFG_LISTEN, "srvtimeout", proxy_parse_timeout },
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100995 { CFG_LISTEN, "rate-limit", proxy_parse_rate_limit },
Willy Tarreauc35362a2014-04-25 13:58:37 +0200996 { CFG_LISTEN, "max-keep-alive-queue", proxy_parse_max_ka_queue },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200997 { 0, NULL, NULL },
998}};
999
1000__attribute__((constructor))
1001static void __proxy_module_init(void)
1002{
1003 cfg_register_keywords(&cfg_kws);
1004}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001005
1006/*
1007 * Local variables:
1008 * c-indent-level: 8
1009 * c-basic-offset: 8
1010 * End:
1011 */