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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
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +020031#include <types/capture.h>
Willy Tarreau960f2cb2016-11-24 12:02:29 +010032#include <types/cli.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020033#include <types/global.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010034#include <types/obj_type.h>
Emeric Brun5a8c0a92010-09-23 18:44:36 +020035#include <types/peers.h>
William Lallemanda6c5f332016-11-19 02:25:36 +010036#include <types/stats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020037
William Lallemanda6c5f332016-11-19 02:25:36 +010038#include <proto/applet.h>
39#include <proto/cli.h>
Alexandre Cassen87ea5482007-10-11 20:48:58 +020040#include <proto/backend.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020041#include <proto/fd.h>
Christopher Fauletd7c91962015-04-30 11:48:27 +020042#include <proto/filters.h>
Willy Tarreau51aecc72009-07-12 09:47:04 +020043#include <proto/hdr_idx.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020044#include <proto/listener.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020045#include <proto/log.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010046#include <proto/proto_tcp.h>
Willy Tarreau39e4f622010-05-31 17:01:36 +020047#include <proto/proto_http.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020048#include <proto/proxy.h>
Olivier Houchard614f8d72017-03-14 20:08:46 +010049#include <proto/server.h>
Willy Tarreaud0807c32010-08-27 18:26:11 +020050#include <proto/signal.h>
Willy Tarreaufb0afa72015-04-03 14:46:27 +020051#include <proto/stream.h>
William Lallemanda6c5f332016-11-19 02:25:36 +010052#include <proto/stream_interface.h>
Emeric Brun5a8c0a92010-09-23 18:44:36 +020053#include <proto/task.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020054
55
Willy Tarreau918ff602011-07-25 16:33:49 +020056int listeners; /* # of proxy listeners, set by cfgparse */
Olivier Houchardfbc74e82017-11-24 16:54:05 +010057struct proxy *proxies_list = NULL; /* list of all existing proxies */
Willy Tarreau53fb4ae2009-10-04 23:04:08 +020058struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */
Willy Tarreauf79d9502014-03-15 07:22:35 +010059struct eb_root proxy_by_name = EB_ROOT; /* tree of proxies sorted by name */
Willy Tarreau10479e42010-12-12 14:00:34 +010060unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */
Willy Tarreaubaaee002006-06-26 02:48:02 +020061
Willy Tarreau977b8e42006-12-29 14:19:17 +010062/*
Willy Tarreau816eb542007-11-04 07:04:43 +010063 * This function returns a string containing a name describing capabilities to
64 * report comprehensible error messages. Specifically, it will return the words
Christopher Faulet898566e2016-10-26 11:06:28 +020065 * "frontend", "backend" when appropriate, or "proxy" for all other
Willy Tarreau816eb542007-11-04 07:04:43 +010066 * cases including the proxies declared in "listen" mode.
Willy Tarreau977b8e42006-12-29 14:19:17 +010067 */
Willy Tarreau816eb542007-11-04 07:04:43 +010068const char *proxy_cap_str(int cap)
Willy Tarreau977b8e42006-12-29 14:19:17 +010069{
Willy Tarreau816eb542007-11-04 07:04:43 +010070 if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) {
71 if (cap & PR_CAP_FE)
72 return "frontend";
73 else if (cap & PR_CAP_BE)
74 return "backend";
Willy Tarreau816eb542007-11-04 07:04:43 +010075 }
76 return "proxy";
Willy Tarreau977b8e42006-12-29 14:19:17 +010077}
78
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +010079/*
80 * This function returns a string containing the mode of the proxy in a format
81 * suitable for error messages.
82 */
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +010083const char *proxy_mode_str(int mode) {
84
85 if (mode == PR_MODE_TCP)
86 return "tcp";
87 else if (mode == PR_MODE_HTTP)
88 return "http";
89 else if (mode == PR_MODE_HEALTH)
90 return "health";
91 else
92 return "unknown";
93}
94
Willy Tarreauf3950172009-10-10 18:35:51 +020095/*
96 * This function scans the list of backends and servers to retrieve the first
97 * backend and the first server with the given names, and sets them in both
98 * parameters. It returns zero if either is not found, or non-zero and sets
99 * the ones it did not found to NULL. If a NULL pointer is passed for the
100 * backend, only the pointer to the server will be updated.
101 */
102int get_backend_server(const char *bk_name, const char *sv_name,
103 struct proxy **bk, struct server **sv)
104{
105 struct proxy *p;
106 struct server *s;
Willy Tarreau7ecc4202014-03-15 07:57:11 +0100107 int sid;
Willy Tarreauf3950172009-10-10 18:35:51 +0200108
109 *sv = NULL;
110
Willy Tarreau050536d2012-10-04 08:47:34 +0200111 sid = -1;
Willy Tarreaucfeaa472009-10-10 22:33:08 +0200112 if (*sv_name == '#')
113 sid = atoi(sv_name + 1);
114
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200115 p = proxy_be_by_name(bk_name);
Willy Tarreauf3950172009-10-10 18:35:51 +0200116 if (bk)
117 *bk = p;
118 if (!p)
119 return 0;
120
121 for (s = p->srv; s; s = s->next)
Willy Tarreau4055a102012-11-15 00:15:18 +0100122 if ((sid >= 0 && s->puid == sid) ||
123 (sid < 0 && strcmp(s->id, sv_name) == 0))
Willy Tarreauf3950172009-10-10 18:35:51 +0200124 break;
125 *sv = s;
126 if (!s)
127 return 0;
128 return 1;
129}
130
Willy Tarreaue219db72007-12-03 01:30:13 +0100131/* This function parses a "timeout" statement in a proxy section. It returns
132 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200133 * return zero, it will write an error or warning message into a preallocated
134 * buffer returned at <err>. The trailing is not be written. The function must
135 * be called with <args> pointing to the first command line word, with <proxy>
136 * pointing to the proxy being parsed, and <defpx> to the default proxy or NULL.
137 * As a special case for compatibility with older configs, it also accepts
138 * "{cli|srv|con}timeout" in args[0].
Willy Tarreaue219db72007-12-03 01:30:13 +0100139 */
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200140static int proxy_parse_timeout(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200141 struct proxy *defpx, const char *file, int line,
142 char **err)
Willy Tarreaue219db72007-12-03 01:30:13 +0100143{
144 unsigned timeout;
145 int retval, cap;
146 const char *res, *name;
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200147 int *tv = NULL;
148 int *td = NULL;
Willy Tarreaued446492014-04-28 22:56:38 +0200149 int warn = 0;
Willy Tarreaue219db72007-12-03 01:30:13 +0100150
151 retval = 0;
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200152
153 /* simply skip "timeout" but remain compatible with old form */
154 if (strcmp(args[0], "timeout") == 0)
155 args++;
156
Willy Tarreaue219db72007-12-03 01:30:13 +0100157 name = args[0];
Willy Tarreaued446492014-04-28 22:56:38 +0200158 if (!strcmp(args[0], "client") || (!strcmp(args[0], "clitimeout") && (warn = WARN_CLITO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100159 name = "client";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100160 tv = &proxy->timeout.client;
161 td = &defpx->timeout.client;
Willy Tarreaue219db72007-12-03 01:30:13 +0100162 cap = PR_CAP_FE;
163 } else if (!strcmp(args[0], "tarpit")) {
164 tv = &proxy->timeout.tarpit;
165 td = &defpx->timeout.tarpit;
Willy Tarreau51c9bde2008-01-06 13:40:03 +0100166 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100167 } else if (!strcmp(args[0], "http-keep-alive")) {
168 tv = &proxy->timeout.httpka;
169 td = &defpx->timeout.httpka;
170 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreau036fae02008-01-06 13:24:40 +0100171 } else if (!strcmp(args[0], "http-request")) {
172 tv = &proxy->timeout.httpreq;
173 td = &defpx->timeout.httpreq;
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200174 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaued446492014-04-28 22:56:38 +0200175 } else if (!strcmp(args[0], "server") || (!strcmp(args[0], "srvtimeout") && (warn = WARN_SRVTO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100176 name = "server";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100177 tv = &proxy->timeout.server;
178 td = &defpx->timeout.server;
Willy Tarreaue219db72007-12-03 01:30:13 +0100179 cap = PR_CAP_BE;
Willy Tarreaued446492014-04-28 22:56:38 +0200180 } else if (!strcmp(args[0], "connect") || (!strcmp(args[0], "contimeout") && (warn = WARN_CONTO_DEPRECATED))) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100181 name = "connect";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100182 tv = &proxy->timeout.connect;
183 td = &defpx->timeout.connect;
Willy Tarreaue219db72007-12-03 01:30:13 +0100184 cap = PR_CAP_BE;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100185 } else if (!strcmp(args[0], "check")) {
186 tv = &proxy->timeout.check;
187 td = &defpx->timeout.check;
188 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100189 } else if (!strcmp(args[0], "queue")) {
190 tv = &proxy->timeout.queue;
191 td = &defpx->timeout.queue;
192 cap = PR_CAP_BE;
Willy Tarreauce887fd2012-05-12 12:50:00 +0200193 } else if (!strcmp(args[0], "tunnel")) {
194 tv = &proxy->timeout.tunnel;
195 td = &defpx->timeout.tunnel;
196 cap = PR_CAP_BE;
Willy Tarreau05cdd962014-05-10 14:30:07 +0200197 } else if (!strcmp(args[0], "client-fin")) {
198 tv = &proxy->timeout.clientfin;
199 td = &defpx->timeout.clientfin;
200 cap = PR_CAP_FE;
201 } else if (!strcmp(args[0], "server-fin")) {
202 tv = &proxy->timeout.serverfin;
203 td = &defpx->timeout.serverfin;
204 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100205 } else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200206 memprintf(err,
207 "'timeout' supports 'client', 'server', 'connect', 'check', "
Willy Tarreau05cdd962014-05-10 14:30:07 +0200208 "'queue', 'http-keep-alive', 'http-request', 'tunnel', 'tarpit', "
209 "'client-fin' and 'server-fin' (got '%s')",
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200210 args[0]);
Willy Tarreaue219db72007-12-03 01:30:13 +0100211 return -1;
212 }
213
214 if (*args[1] == 0) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200215 memprintf(err, "'timeout %s' expects an integer value (in milliseconds)", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100216 return -1;
217 }
218
219 res = parse_time_err(args[1], &timeout, TIME_UNIT_MS);
220 if (res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200221 memprintf(err, "unexpected character '%c' in 'timeout %s'", *res, name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100222 return -1;
223 }
224
225 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200226 memprintf(err, "'timeout %s' will be ignored because %s '%s' has no %s capability",
227 name, proxy_type_str(proxy), proxy->id,
228 (cap & PR_CAP_BE) ? "backend" : "frontend");
Willy Tarreaue219db72007-12-03 01:30:13 +0100229 retval = 1;
230 }
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200231 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200232 memprintf(err, "overwriting 'timeout %s' which was already specified", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100233 retval = 1;
234 }
Willy Tarreaued446492014-04-28 22:56:38 +0200235 else if (warn) {
236 if (!already_warned(warn)) {
237 memprintf(err, "the '%s' directive is now deprecated in favor of 'timeout %s', and will not be supported in future versions.",
238 args[0], name);
239 retval = 1;
240 }
241 }
Willy Tarreaue219db72007-12-03 01:30:13 +0100242
Willy Tarreaufac5b592014-05-22 08:24:46 +0200243 if (*args[2] != 0) {
244 memprintf(err, "'timeout %s' : unexpected extra argument '%s' after value '%s'.", name, args[2], args[1]);
245 retval = -1;
246 }
247
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200248 *tv = MS_TO_TICKS(timeout);
Willy Tarreaue219db72007-12-03 01:30:13 +0100249 return retval;
250}
251
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100252/* This function parses a "rate-limit" statement in a proxy section. It returns
253 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200254 * return zero, it will write an error or warning message into a preallocated
255 * buffer returned at <err>. The function must be called with <args> pointing
256 * to the first command line word, with <proxy> pointing to the proxy being
257 * parsed, and <defpx> to the default proxy or NULL.
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100258 */
259static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200260 struct proxy *defpx, const char *file, int line,
261 char **err)
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100262{
263 int retval, cap;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200264 char *res;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100265 unsigned int *tv = NULL;
266 unsigned int *td = NULL;
267 unsigned int val;
268
269 retval = 0;
270
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200271 if (strcmp(args[1], "sessions") == 0) {
Willy Tarreau13a34bd2009-05-10 18:52:49 +0200272 tv = &proxy->fe_sps_lim;
273 td = &defpx->fe_sps_lim;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100274 cap = PR_CAP_FE;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200275 }
276 else {
277 memprintf(err, "'%s' only supports 'sessions' (got '%s')", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100278 return -1;
279 }
280
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200281 if (*args[2] == 0) {
282 memprintf(err, "'%s %s' expects expects an integer value (in sessions/second)", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100283 return -1;
284 }
285
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200286 val = strtoul(args[2], &res, 0);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100287 if (*res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200288 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 +0100289 return -1;
290 }
291
292 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200293 memprintf(err, "%s %s will be ignored because %s '%s' has no %s capability",
294 args[0], args[1], proxy_type_str(proxy), proxy->id,
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100295 (cap & PR_CAP_BE) ? "backend" : "frontend");
296 retval = 1;
297 }
298 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200299 memprintf(err, "overwriting %s %s which was already specified", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100300 retval = 1;
301 }
302
303 *tv = val;
304 return retval;
305}
306
Willy Tarreauc35362a2014-04-25 13:58:37 +0200307/* This function parses a "max-keep-alive-queue" statement in a proxy section.
308 * It returns -1 if there is any error, 1 for a warning, otherwise zero. If it
309 * does not return zero, it will write an error or warning message into a
310 * preallocated buffer returned at <err>. The function must be called with
311 * <args> pointing to the first command line word, with <proxy> pointing to
312 * the proxy being parsed, and <defpx> to the default proxy or NULL.
313 */
314static int proxy_parse_max_ka_queue(char **args, int section, struct proxy *proxy,
315 struct proxy *defpx, const char *file, int line,
316 char **err)
317{
318 int retval;
319 char *res;
320 unsigned int val;
321
322 retval = 0;
323
324 if (*args[1] == 0) {
325 memprintf(err, "'%s' expects expects an integer value (or -1 to disable)", args[0]);
326 return -1;
327 }
328
329 val = strtol(args[1], &res, 0);
330 if (*res) {
331 memprintf(err, "'%s' : unexpected character '%c' in integer value '%s'", args[0], *res, args[1]);
332 return -1;
333 }
334
335 if (!(proxy->cap & PR_CAP_BE)) {
336 memprintf(err, "%s will be ignored because %s '%s' has no backend capability",
337 args[0], proxy_type_str(proxy), proxy->id);
338 retval = 1;
339 }
340
341 /* we store <val+1> so that a user-facing value of -1 is stored as zero (default) */
342 proxy->max_ka_queue = val + 1;
343 return retval;
344}
345
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200346/* This function parses a "declare" statement in a proxy section. It returns -1
347 * if there is any error, 1 for warning, otherwise 0. If it does not return zero,
348 * it will write an error or warning message into a preallocated buffer returned
349 * at <err>. The function must be called with <args> pointing to the first command
350 * line word, with <proxy> pointing to the proxy being parsed, and <defpx> to the
351 * default proxy or NULL.
352 */
353static int proxy_parse_declare(char **args, int section, struct proxy *curpx,
354 struct proxy *defpx, const char *file, int line,
355 char **err)
356{
357 /* Capture keyword wannot be declared in a default proxy. */
358 if (curpx == defpx) {
359 memprintf(err, "'%s' not avalaible in default section", args[0]);
360 return -1;
361 }
362
363 /* Capture keywork is only avalaible in frontend. */
364 if (!(curpx->cap & PR_CAP_FE)) {
365 memprintf(err, "'%s' only avalaible in frontend or listen section", args[0]);
366 return -1;
367 }
368
369 /* Check mandatory second keyword. */
370 if (!args[1] || !*args[1]) {
371 memprintf(err, "'%s' needs a second keyword that specify the type of declaration ('capture')", args[0]);
372 return -1;
373 }
374
375 /* Actually, declare is only avalaible for declaring capture
376 * slot, but in the future it can declare maps or variables.
377 * So, this section permits to check and switch acording with
378 * the second keyword.
379 */
380 if (strcmp(args[1], "capture") == 0) {
381 char *error = NULL;
382 long len;
383 struct cap_hdr *hdr;
384
385 /* Check the next keyword. */
386 if (!args[2] || !*args[2] ||
387 (strcmp(args[2], "response") != 0 &&
388 strcmp(args[2], "request") != 0)) {
389 memprintf(err, "'%s %s' requires a direction ('request' or 'response')", args[0], args[1]);
390 return -1;
391 }
392
393 /* Check the 'len' keyword. */
394 if (!args[3] || !*args[3] || strcmp(args[3], "len") != 0) {
395 memprintf(err, "'%s %s' requires a capture length ('len')", args[0], args[1]);
396 return -1;
397 }
398
399 /* Check the length value. */
400 if (!args[4] || !*args[4]) {
401 memprintf(err, "'%s %s': 'len' requires a numeric value that represents the "
402 "capture length",
403 args[0], args[1]);
404 return -1;
405 }
406
407 /* convert the length value. */
408 len = strtol(args[4], &error, 10);
409 if (*error != '\0') {
410 memprintf(err, "'%s %s': cannot parse the length '%s'.",
411 args[0], args[1], args[3]);
412 return -1;
413 }
414
415 /* check length. */
416 if (len <= 0) {
417 memprintf(err, "length must be > 0");
418 return -1;
419 }
420
421 /* register the capture. */
Vincent Bernat02779b62016-04-03 13:48:43 +0200422 hdr = calloc(1, sizeof(*hdr));
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200423 hdr->name = NULL; /* not a header capture */
424 hdr->namelen = 0;
425 hdr->len = len;
426 hdr->pool = create_pool("caphdr", hdr->len + 1, MEM_F_SHARED);
427
428 if (strcmp(args[2], "request") == 0) {
429 hdr->next = curpx->req_cap;
430 hdr->index = curpx->nb_req_cap++;
431 curpx->req_cap = hdr;
432 }
433 if (strcmp(args[2], "response") == 0) {
434 hdr->next = curpx->rsp_cap;
435 hdr->index = curpx->nb_rsp_cap++;
436 curpx->rsp_cap = hdr;
437 }
438 return 0;
439 }
440 else {
441 memprintf(err, "unknown declaration type '%s' (supports 'capture')", args[1]);
442 return -1;
443 }
444}
445
Willy Tarreauf79d9502014-03-15 07:22:35 +0100446/* This function inserts proxy <px> into the tree of known proxies. The proxy's
447 * name is used as the storing key so it must already have been initialized.
448 */
449void proxy_store_name(struct proxy *px)
450{
451 px->conf.by_name.key = px->id;
452 ebis_insert(&proxy_by_name, &px->conf.by_name);
453}
454
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200455/* Returns a pointer to the first proxy matching capabilities <cap> and id
456 * <id>. NULL is returned if no match is found. If <table> is non-zero, it
457 * only considers proxies having a table.
Willy Tarreaubc216c42011-08-02 11:25:54 +0200458 */
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200459struct proxy *proxy_find_by_id(int id, int cap, int table)
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200460{
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200461 struct eb32_node *n;
Willy Tarreaubc216c42011-08-02 11:25:54 +0200462
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200463 for (n = eb32_lookup(&used_proxy_id, id); n; n = eb32_next(n)) {
464 struct proxy *px = container_of(n, struct proxy, conf.id);
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100465
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200466 if (px->uuid != id)
467 break;
Alex Williams96532db2009-11-01 21:27:13 -0500468
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200469 if ((px->cap & cap) != cap)
470 continue;
Alex Williams96532db2009-11-01 21:27:13 -0500471
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200472 if (table && !px->table.size)
473 continue;
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100474
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200475 return px;
476 }
477 return NULL;
478}
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100479
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200480/* Returns a pointer to the first proxy matching either name <name>, or id
481 * <name> if <name> begins with a '#'. NULL is returned if no match is found.
482 * If <table> is non-zero, it only considers proxies having a table.
483 */
484struct proxy *proxy_find_by_name(const char *name, int cap, int table)
485{
486 struct proxy *curproxy;
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200487
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200488 if (*name == '#') {
489 curproxy = proxy_find_by_id(atoi(name + 1), cap, table);
490 if (curproxy)
Willy Tarreauc739aa82015-05-26 11:35:41 +0200491 return curproxy;
Alex Williams96532db2009-11-01 21:27:13 -0500492 }
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100493 else {
494 struct ebpt_node *node;
495
496 for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
497 curproxy = container_of(node, struct proxy, conf.by_name);
Alex Williams96532db2009-11-01 21:27:13 -0500498
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100499 if (strcmp(curproxy->id, name) != 0)
500 break;
501
502 if ((curproxy->cap & cap) != cap)
503 continue;
504
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200505 if (table && !curproxy->table.size)
506 continue;
507
Willy Tarreauc739aa82015-05-26 11:35:41 +0200508 return curproxy;
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100509 }
510 }
Willy Tarreauc739aa82015-05-26 11:35:41 +0200511 return NULL;
Alex Williams96532db2009-11-01 21:27:13 -0500512}
513
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200514/* Finds the best match for a proxy with capabilities <cap>, name <name> and id
515 * <id>. At most one of <id> or <name> may be different provided that <cap> is
516 * valid. Either <id> or <name> may be left unspecified (0). The purpose is to
517 * find a proxy based on some information from a previous configuration, across
518 * reloads or during information exchange between peers.
519 *
520 * Names are looked up first if present, then IDs are compared if present. In
521 * case of an inexact match whatever is forced in the configuration has
522 * precedence in the following order :
523 * - 1) forced ID (proves a renaming / change of proxy type)
524 * - 2) proxy name+type (may indicate a move if ID differs)
525 * - 3) automatic ID+type (may indicate a renaming)
526 *
527 * Depending on what is found, we can end up in the following situations :
528 *
529 * name id cap | possible causes
530 * -------------+-----------------
531 * -- -- -- | nothing found
532 * -- -- ok | nothing found
533 * -- ok -- | proxy deleted, ID points to next one
534 * -- ok ok | proxy renamed, or deleted with ID pointing to next one
535 * ok -- -- | proxy deleted, but other half with same name still here (before)
536 * ok -- ok | proxy's ID changed (proxy moved in the config file)
537 * ok ok -- | proxy deleted, but other half with same name still here (after)
538 * ok ok ok | perfect match
539 *
540 * Upon return if <diff> is not NULL, it is zeroed then filled with up to 3 bits :
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200541 * - PR_FBM_MISMATCH_ID : proxy was found but ID differs
542 * (and ID was not zero)
543 * - PR_FBM_MISMATCH_NAME : proxy was found by ID but name differs
544 * (and name was not NULL)
545 * - PR_FBM_MISMATCH_PROXYTYPE : a proxy of different type was found with
546 * the same name and/or id
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200547 *
548 * Only a valid proxy is returned. If capabilities do not match, NULL is
549 * returned. The caller can check <diff> to report detailed warnings / errors,
550 * and decide whether or not to use what was found.
551 */
552struct proxy *proxy_find_best_match(int cap, const char *name, int id, int *diff)
553{
554 struct proxy *byname;
555 struct proxy *byid;
556
557 if (!name && !id)
558 return NULL;
559
560 if (diff)
561 *diff = 0;
562
563 byname = byid = NULL;
564
565 if (name) {
566 byname = proxy_find_by_name(name, cap, 0);
567 if (byname && (!id || byname->uuid == id))
568 return byname;
569 }
570
571 /* remaining possiblities :
572 * - name not set
573 * - name set but not found
574 * - name found, but ID doesn't match.
575 */
576 if (id) {
577 byid = proxy_find_by_id(id, cap, 0);
578 if (byid) {
579 if (byname) {
580 /* id+type found, name+type found, but not all 3.
581 * ID wins only if forced, otherwise name wins.
582 */
583 if (byid->options & PR_O_FORCED_ID) {
584 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200585 *diff |= PR_FBM_MISMATCH_NAME;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200586 return byid;
587 }
588 else {
589 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200590 *diff |= PR_FBM_MISMATCH_ID;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200591 return byname;
592 }
593 }
594
595 /* remaining possiblities :
596 * - name not set
597 * - name set but not found
598 */
599 if (name && diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200600 *diff |= PR_FBM_MISMATCH_NAME;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200601 return byid;
602 }
603
604 /* ID not found */
605 if (byname) {
606 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200607 *diff |= PR_FBM_MISMATCH_ID;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200608 return byname;
609 }
610 }
611
612 /* All remaining possiblities will lead to NULL. If we can report more
613 * detailed information to the caller about changed types and/or name,
614 * we'll do it. For example, we could detect that "listen foo" was
615 * split into "frontend foo_ft" and "backend foo_bk" if IDs are forced.
616 * - name not set, ID not found
617 * - name not found, ID not set
618 * - name not found, ID not found
619 */
620 if (!diff)
621 return NULL;
622
623 if (name) {
624 byname = proxy_find_by_name(name, 0, 0);
625 if (byname && (!id || byname->uuid == id))
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200626 *diff |= PR_FBM_MISMATCH_PROXYTYPE;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200627 }
628
629 if (id) {
630 byid = proxy_find_by_id(id, 0, 0);
631 if (byid) {
632 if (!name)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200633 *diff |= PR_FBM_MISMATCH_PROXYTYPE; /* only type changed */
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200634 else if (byid->options & PR_O_FORCED_ID)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200635 *diff |= PR_FBM_MISMATCH_NAME | PR_FBM_MISMATCH_PROXYTYPE; /* name and type changed */
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200636 /* otherwise it's a different proxy that was returned */
637 }
638 }
639 return NULL;
640}
641
Willy Tarreaubaaee002006-06-26 02:48:02 +0200642/*
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100643 * This function finds a server with matching name within selected proxy.
644 * It also checks if there are more matching servers with
645 * requested name as this often leads into unexpected situations.
646 */
647
648struct server *findserver(const struct proxy *px, const char *name) {
649
650 struct server *cursrv, *target = NULL;
651
652 if (!px)
653 return NULL;
654
655 for (cursrv = px->srv; cursrv; cursrv = cursrv->next) {
656 if (strcmp(cursrv->id, name))
657 continue;
658
659 if (!target) {
660 target = cursrv;
661 continue;
662 }
663
Christopher Faulet767a84b2017-11-24 16:50:31 +0100664 ha_alert("Refusing to use duplicated server '%s' found in proxy: %s!\n",
665 name, px->id);
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100666
667 return NULL;
668 }
669
670 return target;
671}
672
Willy Tarreauff01a212009-03-15 13:46:16 +0100673/* This function checks that the designated proxy has no http directives
674 * enabled. It will output a warning if there are, and will fix some of them.
675 * It returns the number of fatal errors encountered. This should be called
676 * at the end of the configuration parsing if the proxy is not in http mode.
677 * The <file> argument is used to construct the error message.
678 */
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200679int proxy_cfg_ensure_no_http(struct proxy *curproxy)
Willy Tarreauff01a212009-03-15 13:46:16 +0100680{
681 if (curproxy->cookie_name != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100682 ha_warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n",
683 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100684 }
685 if (curproxy->rsp_exp != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100686 ha_warning("config : server regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
687 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100688 }
689 if (curproxy->req_exp != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100690 ha_warning("config : client regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
691 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100692 }
693 if (curproxy->monitor_uri != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100694 ha_warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n",
695 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100696 }
Willy Tarreauf3e49f92009-10-03 12:21:20 +0200697 if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) {
Willy Tarreauff01a212009-03-15 13:46:16 +0100698 curproxy->lbprm.algo &= ~BE_LB_ALGO;
699 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Christopher Faulet767a84b2017-11-24 16:50:31 +0100700 ha_warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n",
701 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100702 }
Willy Tarreau17804162009-11-09 21:27:51 +0100703 if (curproxy->to_log & (LW_REQ | LW_RESP)) {
704 curproxy->to_log &= ~(LW_REQ | LW_RESP);
Christopher Faulet767a84b2017-11-24 16:50:31 +0100705 ha_warning("parsing [%s:%d] : HTTP log/header format not usable with %s '%s' (needs 'mode http').\n",
706 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
707 proxy_type_str(curproxy), curproxy->id);
Willy Tarreau17804162009-11-09 21:27:51 +0100708 }
Willy Tarreau62a61232013-04-12 18:13:46 +0200709 if (curproxy->conf.logformat_string == default_http_log_format ||
710 curproxy->conf.logformat_string == clf_http_log_format) {
711 /* Note: we don't change the directive's file:line number */
712 curproxy->conf.logformat_string = default_tcp_log_format;
Christopher Faulet767a84b2017-11-24 16:50:31 +0100713 ha_warning("parsing [%s:%d] : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n",
714 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
715 proxy_type_str(curproxy), curproxy->id);
Willy Tarreau196729e2012-05-31 19:30:26 +0200716 }
717
Willy Tarreauff01a212009-03-15 13:46:16 +0100718 return 0;
719}
720
Willy Tarreau237250c2011-07-29 01:49:03 +0200721/* Perform the most basic initialization of a proxy :
722 * memset(), list_init(*), reset_timeouts(*).
Willy Tarreaub249e842011-09-07 18:41:08 +0200723 * Any new proxy or peer should be initialized via this function.
Willy Tarreau237250c2011-07-29 01:49:03 +0200724 */
725void init_new_proxy(struct proxy *p)
726{
727 memset(p, 0, sizeof(struct proxy));
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100728 p->obj_type = OBJ_TYPE_PROXY;
Willy Tarreau237250c2011-07-29 01:49:03 +0200729 LIST_INIT(&p->pendconns);
730 LIST_INIT(&p->acl);
731 LIST_INIT(&p->http_req_rules);
Willy Tarreaue365c0b2013-06-11 16:06:12 +0200732 LIST_INIT(&p->http_res_rules);
Willy Tarreau353bc9f2014-04-28 22:05:31 +0200733 LIST_INIT(&p->block_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200734 LIST_INIT(&p->redirect_rules);
735 LIST_INIT(&p->mon_fail_cond);
736 LIST_INIT(&p->switching_rules);
Willy Tarreau4a5cade2012-04-05 21:09:48 +0200737 LIST_INIT(&p->server_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200738 LIST_INIT(&p->persist_rules);
739 LIST_INIT(&p->sticking_rules);
740 LIST_INIT(&p->storersp_rules);
741 LIST_INIT(&p->tcp_req.inspect_rules);
742 LIST_INIT(&p->tcp_rep.inspect_rules);
743 LIST_INIT(&p->tcp_req.l4_rules);
Willy Tarreau620408f2016-10-21 16:37:51 +0200744 LIST_INIT(&p->tcp_req.l5_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200745 LIST_INIT(&p->req_add);
746 LIST_INIT(&p->rsp_add);
747 LIST_INIT(&p->listener_queue);
William Lallemand0f99e342011-10-12 17:50:54 +0200748 LIST_INIT(&p->logsrvs);
William Lallemand723b73a2012-02-08 16:37:49 +0100749 LIST_INIT(&p->logformat);
Dragan Dosen0b85ece2015-09-25 19:17:44 +0200750 LIST_INIT(&p->logformat_sd);
William Lallemanda73203e2012-03-12 12:48:57 +0100751 LIST_INIT(&p->format_unique_id);
Willy Tarreau2a65ff02012-09-13 17:54:29 +0200752 LIST_INIT(&p->conf.bind);
Willy Tarreau4348fad2012-09-20 16:48:07 +0200753 LIST_INIT(&p->conf.listeners);
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200754 LIST_INIT(&p->conf.args.list);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200755 LIST_INIT(&p->tcpcheck_rules);
Christopher Faulet443ea1a2016-02-04 13:40:26 +0100756 LIST_INIT(&p->filter_configs);
Willy Tarreau237250c2011-07-29 01:49:03 +0200757
758 /* Timeouts are defined as -1 */
759 proxy_reset_timeouts(p);
760 p->tcp_rep.inspect_delay = TICK_ETERNITY;
Willy Tarreau050536d2012-10-04 08:47:34 +0200761
762 /* initial uuid is unassigned (-1) */
763 p->uuid = -1;
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200764
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100765 HA_SPIN_INIT(&p->lock);
Willy Tarreau237250c2011-07-29 01:49:03 +0200766}
767
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100768/*
Willy Tarreau2ff76222007-04-09 19:29:56 +0200769 * This function creates all proxy sockets. It should be done very early,
770 * typically before privileges are dropped. The sockets will be registered
771 * but not added to any fd_set, in order not to loose them across the fork().
Willy Tarreau562515c2011-07-25 08:11:52 +0200772 * The proxies also start in READY state because they all have their listeners
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200773 * bound.
Willy Tarreau2ff76222007-04-09 19:29:56 +0200774 *
775 * Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
776 * Retryable errors will only be printed if <verbose> is not zero.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200777 */
778int start_proxies(int verbose)
779{
780 struct proxy *curproxy;
781 struct listener *listener;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100782 int lerr, err = ERR_NONE;
783 int pxerr;
784 char msg[100];
Willy Tarreaubaaee002006-06-26 02:48:02 +0200785
Olivier Houchardfbc74e82017-11-24 16:54:05 +0100786 for (curproxy = proxies_list; curproxy != NULL; curproxy = curproxy->next) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200787 if (curproxy->state != PR_STNEW)
788 continue; /* already initialized */
789
790 pxerr = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +0200791 list_for_each_entry(listener, &curproxy->conf.listeners, by_fe) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100792 if (listener->state != LI_ASSIGNED)
793 continue; /* already started */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200794
Emeric Bruncf20bf12010-10-22 16:06:11 +0200795 lerr = listener->proto->bind(listener, msg, sizeof(msg));
Willy Tarreaubaaee002006-06-26 02:48:02 +0200796
Willy Tarreaue6b98942007-10-29 01:09:36 +0100797 /* errors are reported if <verbose> is set or if they are fatal */
798 if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) {
799 if (lerr & ERR_ALERT)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100800 ha_alert("Starting %s %s: %s\n",
801 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaue6b98942007-10-29 01:09:36 +0100802 else if (lerr & ERR_WARN)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100803 ha_warning("Starting %s %s: %s\n",
804 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200805 }
806
Willy Tarreaue6b98942007-10-29 01:09:36 +0100807 err |= lerr;
808 if (lerr & (ERR_ABORT | ERR_FATAL)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200809 pxerr |= 1;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100810 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200811 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100812 else if (lerr & ERR_CODE) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200813 pxerr |= 1;
814 continue;
815 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200816 }
817
818 if (!pxerr) {
Willy Tarreau562515c2011-07-25 08:11:52 +0200819 curproxy->state = PR_STREADY;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200820 send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id);
821 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100822
823 if (err & ERR_ABORT)
824 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200825 }
826
827 return err;
828}
829
830
831/*
Willy Tarreau918ff602011-07-25 16:33:49 +0200832 * This is the proxy management task. It enables proxies when there are enough
Willy Tarreau87b09662015-04-03 00:22:06 +0200833 * free streams, or stops them when the table is full. It is designed to be
Willy Tarreau918ff602011-07-25 16:33:49 +0200834 * called as a task which is woken up upon stopping or when rate limiting must
835 * be enforced.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200836 */
Olivier Houchard9f6af332018-05-25 14:04:04 +0200837struct task *manage_proxy(struct task *t, void *context, unsigned short state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200838{
Olivier Houchard9f6af332018-05-25 14:04:04 +0200839 struct proxy *p = context;
Willy Tarreau918ff602011-07-25 16:33:49 +0200840 int next = TICK_ETERNITY;
Willy Tarreau79584222009-03-06 09:18:27 +0100841 unsigned int wait;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200842
Willy Tarreau918ff602011-07-25 16:33:49 +0200843 /* We should periodically try to enable listeners waiting for a
844 * global resource here.
845 */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200846
Willy Tarreau918ff602011-07-25 16:33:49 +0200847 /* first, let's check if we need to stop the proxy */
848 if (unlikely(stopping && p->state != PR_STSTOPPED)) {
849 int t;
850 t = tick_remain(now_ms, p->stop_time);
851 if (t == 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100852 ha_warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
853 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
Willy Tarreau918ff602011-07-25 16:33:49 +0200854 send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
855 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
856 stop_proxy(p);
857 /* try to free more memory */
Willy Tarreaubafbe012017-11-24 17:34:44 +0100858 pool_gc(NULL);
Willy Tarreau918ff602011-07-25 16:33:49 +0200859 }
860 else {
861 next = tick_first(next, p->stop_time);
862 }
863 }
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200864
Willy Tarreau3a925c12013-09-04 17:54:01 +0200865 /* If the proxy holds a stick table, we need to purge all unused
866 * entries. These are all the ones in the table with ref_cnt == 0
867 * and all the ones in the pool used to allocate new entries. Any
Willy Tarreau87b09662015-04-03 00:22:06 +0200868 * entry attached to an existing stream waiting for a store will
Willy Tarreau3a925c12013-09-04 17:54:01 +0200869 * be in neither list. Any entry being dumped will have ref_cnt > 0.
870 * However we protect tables that are being synced to peers.
871 */
872 if (unlikely(stopping && p->state == PR_STSTOPPED && p->table.current)) {
873 if (!p->table.syncing) {
874 stktable_trash_oldest(&p->table, p->table.current);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100875 pool_gc(NULL);
Willy Tarreau3a925c12013-09-04 17:54:01 +0200876 }
877 if (p->table.current) {
878 /* some entries still remain, let's recheck in one second */
879 next = tick_first(next, tick_add(now_ms, 1000));
880 }
881 }
882
Willy Tarreau918ff602011-07-25 16:33:49 +0200883 /* the rest below is just for frontends */
884 if (!(p->cap & PR_CAP_FE))
885 goto out;
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200886
Willy Tarreau918ff602011-07-25 16:33:49 +0200887 /* check the various reasons we may find to block the frontend */
888 if (unlikely(p->feconn >= p->maxconn)) {
889 if (p->state == PR_STREADY)
890 p->state = PR_STFULL;
891 goto out;
892 }
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100893
Willy Tarreau918ff602011-07-25 16:33:49 +0200894 /* OK we have no reason to block, so let's unblock if we were blocking */
895 if (p->state == PR_STFULL)
896 p->state = PR_STREADY;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100897
Willy Tarreau918ff602011-07-25 16:33:49 +0200898 if (p->fe_sps_lim &&
899 (wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) {
900 /* we're blocking because a limit was reached on the number of
901 * requests/s on the frontend. We want to re-check ASAP, which
902 * means in 1 ms before estimated expiration date, because the
903 * timer will have settled down.
904 */
905 next = tick_first(next, tick_add(now_ms, wait));
906 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200907 }
Willy Tarreau918ff602011-07-25 16:33:49 +0200908
909 /* The proxy is not limited so we can re-enable any waiting listener */
910 if (!LIST_ISEMPTY(&p->listener_queue))
911 dequeue_all_listeners(&p->listener_queue);
912 out:
913 t->expire = next;
914 task_queue(t);
915 return t;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200916}
917
918
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100919static int proxy_parse_hard_stop_after(char **args, int section_type, struct proxy *curpx,
920 struct proxy *defpx, const char *file, int line,
921 char **err)
922{
923 const char *res;
924
925 if (!*args[1]) {
926 memprintf(err, "'%s' expects <time> as argument.\n", args[0]);
927 return -1;
928 }
929 res = parse_time_err(args[1], &global.hard_stop_after, TIME_UNIT_MS);
930 if (res) {
931 memprintf(err, "unexpected character '%c' in argument to <%s>.\n", *res, args[0]);
932 return -1;
933 }
934 return 0;
935}
936
Olivier Houchard9f6af332018-05-25 14:04:04 +0200937struct task *hard_stop(struct task *t, void *context, unsigned short state)
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100938{
939 struct proxy *p;
940 struct stream *s;
941
942 if (killed) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100943 ha_warning("Some tasks resisted to hard-stop, exiting now.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100944 send_log(NULL, LOG_WARNING, "Some tasks resisted to hard-stop, exiting now.\n");
945 /* Do some cleanup and explicitely quit */
946 deinit();
947 exit(0);
948 }
949
Christopher Faulet767a84b2017-11-24 16:50:31 +0100950 ha_warning("soft-stop running for too long, performing a hard-stop.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100951 send_log(NULL, LOG_WARNING, "soft-stop running for too long, performing a hard-stop.\n");
Olivier Houchardfbc74e82017-11-24 16:54:05 +0100952 p = proxies_list;
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100953 while (p) {
954 if ((p->cap & PR_CAP_FE) && (p->feconn > 0)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100955 ha_warning("Proxy %s hard-stopped (%d remaining conns will be closed).\n",
956 p->id, p->feconn);
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100957 send_log(p, LOG_WARNING, "Proxy %s hard-stopped (%d remaining conns will be closed).\n",
958 p->id, p->feconn);
959 }
960 p = p->next;
961 }
962 list_for_each_entry(s, &streams, list) {
963 stream_shutdown(s, SF_ERR_KILLED);
964 }
965
966 killed = 1;
967 t->expire = tick_add(now_ms, MS_TO_TICKS(1000));
968 return t;
969}
970
Willy Tarreaubaaee002006-06-26 02:48:02 +0200971/*
972 * this function disables health-check servers so that the process will quickly be ignored
973 * by load balancers. Note that if a proxy was already in the PAUSED state, then its grace
974 * time will not be used since it would already not listen anymore to the socket.
975 */
976void soft_stop(void)
977{
978 struct proxy *p;
Willy Tarreaubbe11b12011-07-25 11:16:24 +0200979 struct peers *prs;
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100980 struct task *task;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200981
982 stopping = 1;
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100983 if (tick_isset(global.hard_stop_after)) {
Emeric Brunc60def82017-09-27 14:59:38 +0200984 task = task_new(MAX_THREADS_MASK);
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100985 if (task) {
986 task->process = hard_stop;
987 task_schedule(task, tick_add(now_ms, global.hard_stop_after));
988 }
989 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100990 ha_alert("out of memory trying to allocate the hard-stop task.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +0100991 }
992 }
Olivier Houchardfbc74e82017-11-24 16:54:05 +0100993 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +0200994 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200995 while (p) {
Olivier Houchard1fc05162017-04-06 01:05:05 +0200996 /* Zombie proxy, let's close the file descriptors */
997 if (p->state == PR_STSTOPPED &&
998 !LIST_ISEMPTY(&p->conf.listeners) &&
999 LIST_ELEM(p->conf.listeners.n,
1000 struct listener *, by_fe)->state >= LI_ZOMBIE) {
1001 struct listener *l;
1002 list_for_each_entry(l, &p->conf.listeners, by_fe) {
1003 if (l->state >= LI_ZOMBIE)
1004 close(l->fd);
1005 l->state = LI_INIT;
1006 }
1007 }
1008
Willy Tarreaubaaee002006-06-26 02:48:02 +02001009 if (p->state != PR_STSTOPPED) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001010 ha_warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
Willy Tarreauf8fbcef2008-10-10 17:51:34 +02001011 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 +02001012 p->stop_time = tick_add(now_ms, p->grace);
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001013
Willy Tarreau20b7afb2015-09-28 16:35:04 +02001014 /* Note: do not wake up stopped proxies' task nor their tables'
1015 * tasks as these ones might point to already released entries.
1016 */
1017 if (p->table.size && p->table.sync_task)
1018 task_wakeup(p->table.sync_task, TASK_WOKEN_MSG);
1019
1020 if (p->task)
1021 task_wakeup(p->task, TASK_WOKEN_MSG);
1022 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001023 p = p->next;
1024 }
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001025
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001026 prs = cfg_peers;
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001027 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001028 if (prs->peers_fe)
1029 stop_proxy(prs->peers_fe);
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001030 prs = prs->next;
1031 }
Willy Tarreaud0807c32010-08-27 18:26:11 +02001032 /* signal zero is used to broadcast the "stopping" event */
1033 signal_handler(0);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001034}
1035
1036
Willy Tarreaube58c382011-07-24 18:28:10 +02001037/* Temporarily disables listening on all of the proxy's listeners. Upon
1038 * success, the proxy enters the PR_PAUSED state. If disabling at least one
1039 * listener returns an error, then the proxy state is set to PR_STERROR
Willy Tarreauce8fe252011-09-07 19:14:57 +02001040 * because we don't know how to resume from this. The function returns 0
1041 * if it fails, or non-zero on success.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001042 */
Willy Tarreauce8fe252011-09-07 19:14:57 +02001043int pause_proxy(struct proxy *p)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001044{
1045 struct listener *l;
Willy Tarreauce8fe252011-09-07 19:14:57 +02001046
1047 if (!(p->cap & PR_CAP_FE) || p->state == PR_STERROR ||
1048 p->state == PR_STSTOPPED || p->state == PR_STPAUSED)
1049 return 1;
1050
Christopher Faulet767a84b2017-11-24 16:50:31 +01001051 ha_warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001052 send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
1053
Willy Tarreau4348fad2012-09-20 16:48:07 +02001054 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreaube58c382011-07-24 18:28:10 +02001055 if (!pause_listener(l))
Willy Tarreaubaaee002006-06-26 02:48:02 +02001056 p->state = PR_STERROR;
1057 }
Willy Tarreauce8fe252011-09-07 19:14:57 +02001058
1059 if (p->state == PR_STERROR) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001060 ha_warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001061 send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
1062 return 0;
1063 }
1064
1065 p->state = PR_STPAUSED;
1066 return 1;
Willy Tarreauda250db2008-10-12 12:07:48 +02001067}
1068
Olivier Houchard1fc05162017-04-06 01:05:05 +02001069/* This function makes the proxy unusable, but keeps the listening sockets
1070 * opened, so that if any process requests them, we are able to serve them.
1071 * This should only be called early, before we started accepting requests.
1072 */
1073void zombify_proxy(struct proxy *p)
1074{
1075 struct listener *l;
1076 struct listener *first_to_listen = NULL;
1077
1078 list_for_each_entry(l, &p->conf.listeners, by_fe) {
1079 enum li_state oldstate = l->state;
1080
1081 unbind_listener_no_close(l);
1082 if (l->state >= LI_ASSIGNED) {
1083 delete_listener(l);
Olivier Houchard1fc05162017-04-06 01:05:05 +02001084 }
1085 /*
1086 * Pretend we're still up and running so that the fd
1087 * will be sent if asked.
1088 */
1089 l->state = LI_ZOMBIE;
1090 if (!first_to_listen && oldstate >= LI_LISTEN)
1091 first_to_listen = l;
1092 }
1093 /* Quick hack : at stop time, to know we have to close the sockets
1094 * despite the proxy being marked as stopped, make the first listener
1095 * of the listener list an active one, so that we don't have to
1096 * parse the whole list to be sure.
1097 */
1098 if (first_to_listen && LIST_ELEM(p->conf.listeners.n,
1099 struct listener *, by_fe) != first_to_listen) {
1100 LIST_DEL(&l->by_fe);
1101 LIST_ADD(&p->conf.listeners, &l->by_fe);
1102 }
1103
1104 p->state = PR_STSTOPPED;
1105}
Willy Tarreauda250db2008-10-12 12:07:48 +02001106
1107/*
1108 * This function completely stops a proxy and releases its listeners. It has
1109 * to be called when going down in order to release the ports so that another
1110 * process may bind to them. It must also be called on disabled proxies at the
1111 * end of start-up. When all listeners are closed, the proxy is set to the
1112 * PR_STSTOPPED state.
1113 */
1114void stop_proxy(struct proxy *p)
1115{
1116 struct listener *l;
1117
Willy Tarreau4348fad2012-09-20 16:48:07 +02001118 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauda250db2008-10-12 12:07:48 +02001119 unbind_listener(l);
1120 if (l->state >= LI_ASSIGNED) {
1121 delete_listener(l);
Willy Tarreauda250db2008-10-12 12:07:48 +02001122 }
1123 }
1124 p->state = PR_STSTOPPED;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001125}
1126
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001127/* This function resumes listening on the specified proxy. It scans all of its
1128 * listeners and tries to enable them all. If any of them fails, the proxy is
1129 * put back to the paused state. It returns 1 upon success, or zero if an error
1130 * is encountered.
1131 */
1132int resume_proxy(struct proxy *p)
1133{
1134 struct listener *l;
1135 int fail;
1136
1137 if (p->state != PR_STPAUSED)
1138 return 1;
1139
Christopher Faulet767a84b2017-11-24 16:50:31 +01001140 ha_warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001141 send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
1142
1143 fail = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +02001144 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001145 if (!resume_listener(l)) {
1146 int port;
1147
1148 port = get_host_port(&l->addr);
1149 if (port) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001150 ha_warning("Port %d busy while trying to enable %s %s.\n",
1151 port, proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001152 send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n",
1153 port, proxy_cap_str(p->cap), p->id);
1154 }
1155 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001156 ha_warning("Bind on socket %d busy while trying to enable %s %s.\n",
1157 l->luid, proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001158 send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n",
1159 l->luid, proxy_cap_str(p->cap), p->id);
1160 }
1161
1162 /* Another port might have been enabled. Let's stop everything. */
1163 fail = 1;
1164 break;
1165 }
1166 }
1167
1168 p->state = PR_STREADY;
1169 if (fail) {
1170 pause_proxy(p);
1171 return 0;
1172 }
1173 return 1;
1174}
1175
Willy Tarreaubaaee002006-06-26 02:48:02 +02001176/*
1177 * This function temporarily disables listening so that another new instance
1178 * can start listening. It is designed to be called upon reception of a
1179 * SIGTTOU, after which either a SIGUSR1 can be sent to completely stop
1180 * the proxy, or a SIGTTIN can be sent to listen again.
1181 */
1182void pause_proxies(void)
1183{
1184 int err;
1185 struct proxy *p;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001186 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001187
1188 err = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001189 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001190 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001191 while (p) {
Willy Tarreauce8fe252011-09-07 19:14:57 +02001192 err |= !pause_proxy(p);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001193 p = p->next;
1194 }
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001195
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001196 prs = cfg_peers;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001197 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001198 if (prs->peers_fe)
1199 err |= !pause_proxy(prs->peers_fe);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001200 prs = prs->next;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001201 }
1202
Willy Tarreaubaaee002006-06-26 02:48:02 +02001203 if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001204 ha_warning("Some proxies refused to pause, performing soft stop now.\n");
Willy Tarreaubaaee002006-06-26 02:48:02 +02001205 send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
1206 soft_stop();
1207 }
1208}
1209
1210
1211/*
1212 * This function reactivates listening. This can be used after a call to
1213 * sig_pause(), for example when a new instance has failed starting up.
1214 * It is designed to be called upon reception of a SIGTTIN.
1215 */
Willy Tarreaube58c382011-07-24 18:28:10 +02001216void resume_proxies(void)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001217{
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001218 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001219 struct proxy *p;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001220 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001221
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001222 err = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001223 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001224 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001225 while (p) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001226 err |= !resume_proxy(p);
1227 p = p->next;
1228 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001229
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001230 prs = cfg_peers;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001231 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001232 if (prs->peers_fe)
1233 err |= !resume_proxy(prs->peers_fe);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001234 prs = prs->next;
1235 }
Willy Tarreaube58c382011-07-24 18:28:10 +02001236
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001237 if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001238 ha_warning("Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001239 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 +02001240 }
1241}
1242
Willy Tarreau87b09662015-04-03 00:22:06 +02001243/* Set current stream's backend to <be>. Nothing is done if the
1244 * stream already had a backend assigned, which is indicated by
Willy Tarreaue7dff022015-04-03 01:14:29 +02001245 * s->flags & SF_BE_ASSIGNED.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001246 * All flags, stats and counters which need be updated are updated.
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001247 * Returns 1 if done, 0 in case of internal error, eg: lack of resource.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001248 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001249int stream_set_backend(struct stream *s, struct proxy *be)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001250{
Willy Tarreaue7dff022015-04-03 01:14:29 +02001251 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001252 return 1;
Christopher Faulet41179042016-06-21 11:54:52 +02001253
1254 if (flt_set_stream_backend(s, be) < 0)
1255 return 0;
1256
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001257 s->be = be;
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001258 HA_ATOMIC_UPDATE_MAX(&be->be_counters.conn_max,
1259 HA_ATOMIC_ADD(&be->beconn, 1));
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001260 proxy_inc_be_ctr(be);
1261
Willy Tarreau87b09662015-04-03 00:22:06 +02001262 /* assign new parameters to the stream from the new backend */
Willy Tarreauf27b5ea2009-10-03 22:01:18 +02001263 s->si[1].flags &= ~SI_FL_INDEP_STR;
1264 if (be->options2 & PR_O2_INDEPSTR)
1265 s->si[1].flags |= SI_FL_INDEP_STR;
1266
Hongbo Longe39683c2017-03-10 18:41:51 +01001267 if (tick_isset(be->timeout.serverfin))
1268 s->si[1].hcto = be->timeout.serverfin;
1269
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001270 /* We want to enable the backend-specific analysers except those which
1271 * were already run as part of the frontend/listener. Note that it would
1272 * be more reliable to store the list of analysers that have been run,
1273 * but what we do here is OK for now.
1274 */
Christopher Faulet70e2f272017-01-09 16:33:19 +01001275 s->req.analysers |= be->be_req_ana & ~(strm_li(s) ? strm_li(s)->analysers : 0);
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001276
Willy Tarreau51aecc72009-07-12 09:47:04 +02001277 /* If the target backend requires HTTP processing, we have to allocate
Willy Tarreaueee5b512015-04-03 23:46:31 +02001278 * the HTTP transaction and hdr_idx if we did not have one.
Willy Tarreau51aecc72009-07-12 09:47:04 +02001279 */
Willy Tarreaueee5b512015-04-03 23:46:31 +02001280 if (unlikely(!s->txn && be->http_needed)) {
1281 if (unlikely(!http_alloc_txn(s)))
Willy Tarreau51aecc72009-07-12 09:47:04 +02001282 return 0; /* not enough memory */
Willy Tarreau39e4f622010-05-31 17:01:36 +02001283
1284 /* and now initialize the HTTP transaction state */
1285 http_init_txn(s);
Willy Tarreau51aecc72009-07-12 09:47:04 +02001286 }
1287
Christopher Faulet309c6412015-12-02 09:57:32 +01001288 /* Be sure to filter request headers if the backend is an HTTP proxy and
1289 * if there are filters attached to the stream. */
1290 if (s->be->mode == PR_MODE_HTTP && HAS_FILTERS(s))
Christopher Faulet0184ea72017-01-05 14:06:34 +01001291 s->req.analysers |= AN_REQ_FLT_HTTP_HDRS;
Christopher Faulet309c6412015-12-02 09:57:32 +01001292
Willy Tarreaueee5b512015-04-03 23:46:31 +02001293 if (s->txn) {
1294 if (be->options2 & PR_O2_RSPBUG_OK)
1295 s->txn->rsp.err_pos = -1; /* let buggy responses pass */
Willy Tarreau4e21ff92014-09-30 18:44:22 +02001296
Willy Tarreaueee5b512015-04-03 23:46:31 +02001297 /* If we chain to an HTTP backend running a different HTTP mode, we
1298 * have to re-adjust the desired keep-alive/close mode to accommodate
1299 * both the frontend's and the backend's modes.
1300 */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001301 if (strm_fe(s)->mode == PR_MODE_HTTP && be->mode == PR_MODE_HTTP &&
1302 ((strm_fe(s)->options & PR_O_HTTP_MODE) != (be->options & PR_O_HTTP_MODE)))
Willy Tarreaueee5b512015-04-03 23:46:31 +02001303 http_adjust_conn_mode(s, s->txn, &s->txn->req);
Willy Tarreau80a92c02014-03-12 10:41:13 +01001304
Willy Tarreaueee5b512015-04-03 23:46:31 +02001305 /* If an LB algorithm needs to access some pre-parsed body contents,
1306 * we must not start to forward anything until the connection is
1307 * confirmed otherwise we'll lose the pointer to these data and
1308 * prevent the hash from being doable again after a redispatch.
1309 */
1310 if (be->mode == PR_MODE_HTTP &&
1311 (be->lbprm.algo & (BE_LB_KIND | BE_LB_PARM)) == (BE_LB_KIND_HI | BE_LB_HASH_PRM))
1312 s->txn->req.flags |= HTTP_MSGF_WAIT_CONN;
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001313
1314 /* we may request to parse a request body */
1315 if ((be->options & PR_O_WREQ_BODY) &&
1316 (s->txn->req.body_len || (s->txn->req.flags & HTTP_MSGF_TE_CHNK)))
1317 s->req.analysers |= AN_REQ_HTTP_BODY;
Willy Tarreaueee5b512015-04-03 23:46:31 +02001318 }
1319
1320 s->flags |= SF_BE_ASSIGNED;
Willy Tarreau96e31212011-05-30 18:10:30 +02001321 if (be->options2 & PR_O2_NODELAY) {
Willy Tarreau22ec1ea2014-11-27 20:45:39 +01001322 s->req.flags |= CF_NEVER_WAIT;
1323 s->res.flags |= CF_NEVER_WAIT;
Willy Tarreau96e31212011-05-30 18:10:30 +02001324 }
1325
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001326 return 1;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001327}
1328
Willy Tarreaudc13c112013-06-21 23:16:39 +02001329static struct cfg_kw_list cfg_kws = {ILH, {
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001330 { CFG_GLOBAL, "hard-stop-after", proxy_parse_hard_stop_after },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001331 { CFG_LISTEN, "timeout", proxy_parse_timeout },
1332 { CFG_LISTEN, "clitimeout", proxy_parse_timeout },
1333 { CFG_LISTEN, "contimeout", proxy_parse_timeout },
1334 { CFG_LISTEN, "srvtimeout", proxy_parse_timeout },
Willy Tarreau3a7d2072009-03-05 23:48:25 +01001335 { CFG_LISTEN, "rate-limit", proxy_parse_rate_limit },
Willy Tarreauc35362a2014-04-25 13:58:37 +02001336 { CFG_LISTEN, "max-keep-alive-queue", proxy_parse_max_ka_queue },
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +02001337 { CFG_LISTEN, "declare", proxy_parse_declare },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001338 { 0, NULL, NULL },
1339}};
1340
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001341/* Expects to find a frontend named <arg> and returns it, otherwise displays various
1342 * adequate error messages and returns NULL. This function is designed to be used by
1343 * functions requiring a frontend on the CLI.
1344 */
1345struct proxy *cli_find_frontend(struct appctx *appctx, const char *arg)
1346{
1347 struct proxy *px;
1348
1349 if (!*arg) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001350 appctx->ctx.cli.severity = LOG_ERR;
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001351 appctx->ctx.cli.msg = "A frontend name is expected.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001352 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001353 return NULL;
1354 }
1355
1356 px = proxy_fe_by_name(arg);
1357 if (!px) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001358 appctx->ctx.cli.severity = LOG_ERR;
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001359 appctx->ctx.cli.msg = "No such frontend.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001360 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001361 return NULL;
1362 }
1363 return px;
1364}
1365
Olivier Houchard614f8d72017-03-14 20:08:46 +01001366/* Expects to find a backend named <arg> and returns it, otherwise displays various
1367 * adequate error messages and returns NULL. This function is designed to be used by
1368 * functions requiring a frontend on the CLI.
1369 */
1370struct proxy *cli_find_backend(struct appctx *appctx, const char *arg)
1371{
1372 struct proxy *px;
1373
1374 if (!*arg) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001375 appctx->ctx.cli.severity = LOG_ERR;
Olivier Houchard614f8d72017-03-14 20:08:46 +01001376 appctx->ctx.cli.msg = "A backend name is expected.\n";
1377 appctx->st0 = CLI_ST_PRINT;
1378 return NULL;
1379 }
1380
1381 px = proxy_be_by_name(arg);
1382 if (!px) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001383 appctx->ctx.cli.severity = LOG_ERR;
Olivier Houchard614f8d72017-03-14 20:08:46 +01001384 appctx->ctx.cli.msg = "No such backend.\n";
1385 appctx->st0 = CLI_ST_PRINT;
1386 return NULL;
1387 }
1388 return px;
1389}
1390
1391
William Lallemanda6c5f332016-11-19 02:25:36 +01001392/* parse a "show servers" CLI line, returns 0 if it wants to start the dump or
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001393 * 1 if it stops immediately. If an argument is specified, it will set the proxy
1394 * pointer into cli.p0 and its ID into cli.i0.
William Lallemanda6c5f332016-11-19 02:25:36 +01001395 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001396static int cli_parse_show_servers(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemanda6c5f332016-11-19 02:25:36 +01001397{
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001398 struct proxy *px;
William Lallemanda6c5f332016-11-19 02:25:36 +01001399
1400 /* check if a backend name has been provided */
1401 if (*args[3]) {
1402 /* read server state from local file */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001403 px = proxy_be_by_name(args[3]);
William Lallemanda6c5f332016-11-19 02:25:36 +01001404
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001405 if (!px) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001406 appctx->ctx.cli.severity = LOG_ERR;
William Lallemanda6c5f332016-11-19 02:25:36 +01001407 appctx->ctx.cli.msg = "Can't find backend.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001408 appctx->st0 = CLI_ST_PRINT;
William Lallemanda6c5f332016-11-19 02:25:36 +01001409 return 1;
1410 }
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001411 appctx->ctx.cli.p0 = px;
1412 appctx->ctx.cli.i0 = px->uuid;
William Lallemanda6c5f332016-11-19 02:25:36 +01001413 }
1414 return 0;
1415}
1416
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001417/* dumps server state information into <buf> for all the servers found in backend cli.p0.
William Lallemanda6c5f332016-11-19 02:25:36 +01001418 * These information are all the parameters which may change during HAProxy runtime.
1419 * By default, we only export to the last known server state file format.
1420 * These information can be used at next startup to recover same level of server state.
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001421 * It uses the proxy pointer from cli.p0, the proxy's id from cli.i0 and the server's
1422 * pointer from cli.p1.
William Lallemanda6c5f332016-11-19 02:25:36 +01001423 */
1424static int dump_servers_state(struct stream_interface *si, struct chunk *buf)
1425{
1426 struct appctx *appctx = __objt_appctx(si->end);
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001427 struct proxy *px = appctx->ctx.cli.p0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001428 struct server *srv;
1429 char srv_addr[INET6_ADDRSTRLEN + 1];
1430 time_t srv_time_since_last_change;
1431 int bk_f_forced_id, srv_f_forced_id;
1432
William Lallemanda6c5f332016-11-19 02:25:36 +01001433 /* we don't want to report any state if the backend is not enabled on this process */
Willy Tarreau387bd4f2017-11-10 19:08:14 +01001434 if (px->bind_proc && !(px->bind_proc & pid_bit))
William Lallemanda6c5f332016-11-19 02:25:36 +01001435 return 1;
1436
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001437 if (!appctx->ctx.cli.p1)
1438 appctx->ctx.cli.p1 = px->srv;
William Lallemanda6c5f332016-11-19 02:25:36 +01001439
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001440 for (; appctx->ctx.cli.p1 != NULL; appctx->ctx.cli.p1 = srv->next) {
1441 srv = appctx->ctx.cli.p1;
William Lallemanda6c5f332016-11-19 02:25:36 +01001442 srv_addr[0] = '\0';
1443
1444 switch (srv->addr.ss_family) {
1445 case AF_INET:
1446 inet_ntop(srv->addr.ss_family, &((struct sockaddr_in *)&srv->addr)->sin_addr,
1447 srv_addr, INET_ADDRSTRLEN + 1);
1448 break;
1449 case AF_INET6:
1450 inet_ntop(srv->addr.ss_family, &((struct sockaddr_in6 *)&srv->addr)->sin6_addr,
1451 srv_addr, INET6_ADDRSTRLEN + 1);
1452 break;
Daniel Corbett9215ffa2018-05-19 19:43:24 -04001453 default:
1454 memcpy(srv_addr, "-\0", 2);
1455 break;
William Lallemanda6c5f332016-11-19 02:25:36 +01001456 }
1457 srv_time_since_last_change = now.tv_sec - srv->last_change;
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001458 bk_f_forced_id = px->options & PR_O_FORCED_ID ? 1 : 0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001459 srv_f_forced_id = srv->flags & SRV_F_FORCED_ID ? 1 : 0;
1460
1461 chunk_appendf(buf,
1462 "%d %s "
1463 "%d %s %s "
1464 "%d %d %d %d %ld "
1465 "%d %d %d %d %d "
Frédéric Lécaille31694712017-08-01 08:47:19 +02001466 "%d %d %s %u"
William Lallemanda6c5f332016-11-19 02:25:36 +01001467 "\n",
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001468 px->uuid, px->id,
William Lallemanda6c5f332016-11-19 02:25:36 +01001469 srv->puid, srv->id, srv_addr,
Emeric Brun52a91d32017-08-31 14:41:55 +02001470 srv->cur_state, srv->cur_admin, srv->uweight, srv->iweight, (long int)srv_time_since_last_change,
William Lallemanda6c5f332016-11-19 02:25:36 +01001471 srv->check.status, srv->check.result, srv->check.health, srv->check.state, srv->agent.state,
Frédéric Lécaille31694712017-08-01 08:47:19 +02001472 bk_f_forced_id, srv_f_forced_id, srv->hostname ? srv->hostname : "-", srv->svc_port);
Willy Tarreau06d80a92017-10-19 14:32:15 +02001473 if (ci_putchk(si_ic(si), &trash) == -1) {
William Lallemanda6c5f332016-11-19 02:25:36 +01001474 si_applet_cant_put(si);
1475 return 0;
1476 }
1477 }
1478 return 1;
1479}
1480
1481/* Parses backend list or simply use backend name provided by the user to return
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001482 * states of servers to stdout. It dumps proxy <cli.p0> and stops if <cli.i0> is
1483 * non-null.
William Lallemanda6c5f332016-11-19 02:25:36 +01001484 */
1485static int cli_io_handler_servers_state(struct appctx *appctx)
1486{
1487 struct stream_interface *si = appctx->owner;
William Lallemanda6c5f332016-11-19 02:25:36 +01001488 struct proxy *curproxy;
1489
1490 chunk_reset(&trash);
1491
1492 if (appctx->st2 == STAT_ST_INIT) {
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001493 if (!appctx->ctx.cli.p0)
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001494 appctx->ctx.cli.p0 = proxies_list;
William Lallemanda6c5f332016-11-19 02:25:36 +01001495 appctx->st2 = STAT_ST_HEAD;
1496 }
1497
1498 if (appctx->st2 == STAT_ST_HEAD) {
1499 chunk_printf(&trash, "%d\n# %s\n", SRV_STATE_FILE_VERSION, SRV_STATE_FILE_FIELD_NAMES);
Willy Tarreau06d80a92017-10-19 14:32:15 +02001500 if (ci_putchk(si_ic(si), &trash) == -1) {
William Lallemanda6c5f332016-11-19 02:25:36 +01001501 si_applet_cant_put(si);
1502 return 0;
1503 }
1504 appctx->st2 = STAT_ST_INFO;
1505 }
1506
1507 /* STAT_ST_INFO */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001508 for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
1509 curproxy = appctx->ctx.cli.p0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001510 /* servers are only in backends */
1511 if (curproxy->cap & PR_CAP_BE) {
1512 if (!dump_servers_state(si, &trash))
1513 return 0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001514 }
1515 /* only the selected proxy is dumped */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001516 if (appctx->ctx.cli.i0)
William Lallemanda6c5f332016-11-19 02:25:36 +01001517 break;
1518 }
1519
1520 return 1;
1521}
1522
Willy Tarreau608ea592016-12-16 18:01:15 +01001523/* Parses backend list and simply report backend names. It keeps the proxy
1524 * pointer in cli.p0.
1525 */
William Lallemand933efcd2016-11-22 12:34:16 +01001526static int cli_io_handler_show_backend(struct appctx *appctx)
1527{
William Lallemand933efcd2016-11-22 12:34:16 +01001528 struct stream_interface *si = appctx->owner;
1529 struct proxy *curproxy;
1530
1531 chunk_reset(&trash);
1532
Willy Tarreau608ea592016-12-16 18:01:15 +01001533 if (!appctx->ctx.cli.p0) {
William Lallemand933efcd2016-11-22 12:34:16 +01001534 chunk_printf(&trash, "# name\n");
Willy Tarreau06d80a92017-10-19 14:32:15 +02001535 if (ci_putchk(si_ic(si), &trash) == -1) {
William Lallemand933efcd2016-11-22 12:34:16 +01001536 si_applet_cant_put(si);
1537 return 0;
1538 }
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001539 appctx->ctx.cli.p0 = proxies_list;
William Lallemand933efcd2016-11-22 12:34:16 +01001540 }
1541
Willy Tarreau608ea592016-12-16 18:01:15 +01001542 for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
1543 curproxy = appctx->ctx.cli.p0;
William Lallemand933efcd2016-11-22 12:34:16 +01001544
1545 /* looking for backends only */
1546 if (!(curproxy->cap & PR_CAP_BE))
1547 continue;
1548
1549 /* we don't want to list a backend which is bound to this process */
Willy Tarreau387bd4f2017-11-10 19:08:14 +01001550 if (curproxy->bind_proc && !(curproxy->bind_proc & pid_bit))
William Lallemand933efcd2016-11-22 12:34:16 +01001551 continue;
1552
1553 chunk_appendf(&trash, "%s\n", curproxy->id);
Willy Tarreau06d80a92017-10-19 14:32:15 +02001554 if (ci_putchk(si_ic(si), &trash) == -1) {
William Lallemand933efcd2016-11-22 12:34:16 +01001555 si_applet_cant_put(si);
1556 return 0;
1557 }
1558 }
1559
1560 return 1;
1561}
William Lallemanda6c5f332016-11-19 02:25:36 +01001562
Olivier Houchard614f8d72017-03-14 20:08:46 +01001563/* Parses the "enable dynamic-cookies backend" directive, it always returns 1 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001564static int cli_parse_enable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001565{
1566 struct proxy *px;
1567 struct server *s;
1568
1569 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1570 return 1;
1571
1572 px = cli_find_backend(appctx, args[3]);
1573 if (!px)
1574 return 1;
1575
1576 px->ck_opts |= PR_CK_DYNAMIC;
1577
1578 for (s = px->srv; s != NULL; s = s->next)
1579 srv_set_dyncookie(s);
1580
1581 return 1;
1582}
1583
1584/* Parses the "disable dynamic-cookies backend" directive, it always returns 1 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001585static int cli_parse_disable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001586{
1587 struct proxy *px;
1588 struct server *s;
1589
1590 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1591 return 1;
1592
1593 px = cli_find_backend(appctx, args[3]);
1594 if (!px)
1595 return 1;
1596
1597 px->ck_opts &= ~PR_CK_DYNAMIC;
1598
1599 for (s = px->srv; s != NULL; s = s->next) {
1600 if (!(s->flags & SRV_F_COOKIESET)) {
1601 free(s->cookie);
1602 s->cookie = NULL;
1603 }
1604 }
1605
1606 return 1;
1607}
1608
1609/* Parses the "set dynamic-cookie-key backend" directive, it always returns 1 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001610static int cli_parse_set_dyncookie_key_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001611{
1612 struct proxy *px;
1613 struct server *s;
1614 char *newkey;
1615
1616 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1617 return 1;
1618
1619 px = cli_find_backend(appctx, args[3]);
1620 if (!px)
1621 return 1;
1622
1623 if (!*args[4]) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001624 appctx->ctx.cli.severity = LOG_ERR;
Olivier Houchard614f8d72017-03-14 20:08:46 +01001625 appctx->ctx.cli.msg = "String value expected.\n";
1626 appctx->st0 = CLI_ST_PRINT;
1627 return 1;
1628 }
1629
1630 newkey = strdup(args[4]);
1631 if (!newkey) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001632 appctx->ctx.cli.severity = LOG_ERR;
Olivier Houchard614f8d72017-03-14 20:08:46 +01001633 appctx->ctx.cli.msg = "Failed to allocate memory.\n";
1634 appctx->st0 = CLI_ST_PRINT;
1635 return 1;
1636 }
1637 free(px->dyncookie_key);
1638 px->dyncookie_key = newkey;
1639
1640 for (s = px->srv; s != NULL; s = s->next)
1641 srv_set_dyncookie(s);
1642
1643 return 1;
1644}
1645
Willy Tarreauc429a1f2016-11-23 16:22:04 +01001646/* Parses the "set maxconn frontend" directive, it always returns 1 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001647static int cli_parse_set_maxconn_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreauc429a1f2016-11-23 16:22:04 +01001648{
1649 struct proxy *px;
1650 struct listener *l;
1651 int v;
1652
1653 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1654 return 1;
1655
1656 px = cli_find_frontend(appctx, args[3]);
1657 if (!px)
1658 return 1;
1659
1660 if (!*args[4]) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001661 appctx->ctx.cli.severity = LOG_ERR;
Willy Tarreauc429a1f2016-11-23 16:22:04 +01001662 appctx->ctx.cli.msg = "Integer value expected.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001663 appctx->st0 = CLI_ST_PRINT;
Willy Tarreauc429a1f2016-11-23 16:22:04 +01001664 return 1;
1665 }
1666
1667 v = atoi(args[4]);
1668 if (v < 0) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001669 appctx->ctx.cli.severity = LOG_ERR;
Willy Tarreauc429a1f2016-11-23 16:22:04 +01001670 appctx->ctx.cli.msg = "Value out of range.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001671 appctx->st0 = CLI_ST_PRINT;
Willy Tarreauc429a1f2016-11-23 16:22:04 +01001672 return 1;
1673 }
1674
1675 /* OK, the value is fine, so we assign it to the proxy and to all of
1676 * its listeners. The blocked ones will be dequeued.
1677 */
1678 px->maxconn = v;
1679 list_for_each_entry(l, &px->conf.listeners, by_fe) {
1680 l->maxconn = v;
1681 if (l->state == LI_FULL)
1682 resume_listener(l);
1683 }
1684
1685 if (px->maxconn > px->feconn && !LIST_ISEMPTY(&px->listener_queue))
1686 dequeue_all_listeners(&px->listener_queue);
1687
1688 return 1;
1689}
1690
Willy Tarreau5212d7f2016-11-24 11:13:06 +01001691/* Parses the "shutdown frontend" directive, it always returns 1 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001692static int cli_parse_shutdown_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau5212d7f2016-11-24 11:13:06 +01001693{
1694 struct proxy *px;
1695
1696 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1697 return 1;
1698
1699 px = cli_find_frontend(appctx, args[2]);
1700 if (!px)
1701 return 1;
1702
1703 if (px->state == PR_STSTOPPED) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001704 appctx->ctx.cli.severity = LOG_NOTICE;
Willy Tarreau5212d7f2016-11-24 11:13:06 +01001705 appctx->ctx.cli.msg = "Frontend was already shut down.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001706 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau5212d7f2016-11-24 11:13:06 +01001707 return 1;
1708 }
1709
Christopher Faulet767a84b2017-11-24 16:50:31 +01001710 ha_warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
1711 px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
Willy Tarreau5212d7f2016-11-24 11:13:06 +01001712 send_log(px, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
1713 px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
1714 stop_proxy(px);
1715 return 1;
1716}
1717
Willy Tarreau15b9e682016-11-24 11:55:28 +01001718/* Parses the "disable frontend" directive, it always returns 1 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001719static int cli_parse_disable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau15b9e682016-11-24 11:55:28 +01001720{
1721 struct proxy *px;
1722
1723 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1724 return 1;
1725
1726 px = cli_find_frontend(appctx, args[2]);
1727 if (!px)
1728 return 1;
1729
1730 if (px->state == PR_STSTOPPED) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001731 appctx->ctx.cli.severity = LOG_NOTICE;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001732 appctx->ctx.cli.msg = "Frontend was previously shut down, cannot disable.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001733 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001734 return 1;
1735 }
1736
1737 if (px->state == PR_STPAUSED) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001738 appctx->ctx.cli.severity = LOG_NOTICE;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001739 appctx->ctx.cli.msg = "Frontend is already disabled.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001740 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001741 return 1;
1742 }
1743
1744 if (!pause_proxy(px)) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001745 appctx->ctx.cli.severity = LOG_ERR;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001746 appctx->ctx.cli.msg = "Failed to pause frontend, check logs for precise cause.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001747 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001748 return 1;
1749 }
1750 return 1;
1751}
1752
1753/* Parses the "enable frontend" directive, it always returns 1 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001754static int cli_parse_enable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau15b9e682016-11-24 11:55:28 +01001755{
1756 struct proxy *px;
1757
1758 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1759 return 1;
1760
1761 px = cli_find_frontend(appctx, args[2]);
1762 if (!px)
1763 return 1;
1764
1765 if (px->state == PR_STSTOPPED) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001766 appctx->ctx.cli.severity = LOG_ERR;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001767 appctx->ctx.cli.msg = "Frontend was previously shut down, cannot enable.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001768 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001769 return 1;
1770 }
1771
1772 if (px->state != PR_STPAUSED) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001773 appctx->ctx.cli.severity = LOG_NOTICE;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001774 appctx->ctx.cli.msg = "Frontend is already enabled.\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001775 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001776 return 1;
1777 }
1778
1779 if (!resume_proxy(px)) {
Andjelko Iharosc3680ec2017-07-20 16:49:14 +02001780 appctx->ctx.cli.severity = LOG_ERR;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001781 appctx->ctx.cli.msg = "Failed to resume frontend, check logs for precise cause (port conflict?).\n";
Willy Tarreau3b6e5472016-11-24 15:53:53 +01001782 appctx->st0 = CLI_ST_PRINT;
Willy Tarreau15b9e682016-11-24 11:55:28 +01001783 return 1;
1784 }
1785 return 1;
1786}
1787
William Lallemanda6c5f332016-11-19 02:25:36 +01001788/* register cli keywords */
1789static struct cli_kw_list cli_kws = {{ },{
Willy Tarreau15b9e682016-11-24 11:55:28 +01001790 { { "disable", "frontend", NULL }, "disable frontend : temporarily disable specific frontend", cli_parse_disable_frontend, NULL, NULL },
1791 { { "enable", "frontend", NULL }, "enable frontend : re-enable specific frontend", cli_parse_enable_frontend, NULL, NULL },
Willy Tarreauc429a1f2016-11-23 16:22:04 +01001792 { { "set", "maxconn", "frontend", NULL }, "set maxconn frontend : change a frontend's maxconn setting", cli_parse_set_maxconn_frontend, NULL },
William Lallemanda6c5f332016-11-19 02:25:36 +01001793 { { "show","servers", "state", NULL }, "show servers state [id]: dump volatile server information (for backend <id>)", cli_parse_show_servers, cli_io_handler_servers_state },
Willy Tarreau608ea592016-12-16 18:01:15 +01001794 { { "show", "backend", NULL }, "show backend : list backends in the current running config", NULL, cli_io_handler_show_backend },
Willy Tarreau5212d7f2016-11-24 11:13:06 +01001795 { { "shutdown", "frontend", NULL }, "shutdown frontend : stop a specific frontend", cli_parse_shutdown_frontend, NULL, NULL },
Olivier Houchard614f8d72017-03-14 20:08:46 +01001796 { { "set", "dynamic-cookie-key", "backend", NULL }, "set dynamic-cookie-key backend : change a backend secret key for dynamic cookies", cli_parse_set_dyncookie_key_backend, NULL },
1797 { { "enable", "dynamic-cookie", "backend", NULL }, "enable dynamic-cookie backend : enable dynamic cookies on a specific backend", cli_parse_enable_dyncookie_backend, NULL },
1798 { { "disable", "dynamic-cookie", "backend", NULL }, "disable dynamic-cookie backend : disable dynamic cookies on a specific backend", cli_parse_disable_dyncookie_backend, NULL },
William Lallemanda6c5f332016-11-19 02:25:36 +01001799 {{},}
1800}};
1801
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001802__attribute__((constructor))
1803static void __proxy_module_init(void)
1804{
1805 cfg_register_keywords(&cfg_kws);
William Lallemanda6c5f332016-11-19 02:25:36 +01001806 cli_register_kw(&cli_kws);
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001807}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001808
1809/*
1810 * Local variables:
1811 * c-indent-level: 8
1812 * c-basic-offset: 8
1813 * End:
1814 */