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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
Willy Tarreau03fa5df2010-05-24 21:02:37 +02002 * Frontend variables and functions.
Willy Tarreaubaaee002006-06-26 02:48:02 +02003 *
Willy Tarreaud6896bc2013-01-07 22:48:29 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +02005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020017#include <string.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020018
19#include <sys/socket.h>
20#include <sys/stat.h>
21#include <sys/types.h>
22
Willy Tarreau48a7e722010-12-24 15:26:39 +010023#include <netinet/tcp.h>
24
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020025#include <haproxy/api.h>
Willy Tarreauc13ed532020-06-02 10:22:45 +020026#include <haproxy/chunk.h>
Willy Tarreau762d7a52020-06-04 11:23:07 +020027#include <haproxy/frontend.h>
Willy Tarreaue6ce10b2020-06-04 15:33:47 +020028#include <haproxy/sample.h>
Willy Tarreaucea0e1b2020-06-04 17:25:40 +020029#include <haproxy/task.h>
Willy Tarreau48fbcae2020-06-03 18:09:46 +020030#include <haproxy/tools.h>
Willy Tarreau92b4f132020-06-01 11:05:15 +020031#include <haproxy/time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020032
Willy Tarreauf268ee82020-06-04 17:05:57 +020033#include <haproxy/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020034
Willy Tarreau8797c062007-05-07 00:55:35 +020035#include <proto/acl.h>
Willy Tarreauaa74c4e2020-06-04 10:19:23 +020036#include <haproxy/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020037#include <proto/channel.h>
Willy Tarreau0f6ffd62020-06-03 19:33:00 +020038#include <haproxy/fd.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020039#include <proto/log.h>
Willy Tarreaufc774542020-06-04 17:31:04 +020040#include <haproxy/proto_tcp.h>
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020041#include <proto/http_ana.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +010042#include <proto/proxy.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020043#include <proto/stream.h>
Willy Tarreaudded32d2008-11-30 19:48:07 +010044#include <proto/stream_interface.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020045
Willy Tarreau87b09662015-04-03 00:22:06 +020046/* Finish a stream accept() for a proxy (TCP or HTTP). It returns a negative
Willy Tarreauabe8ea52010-11-11 10:56:04 +010047 * value in case of a critical failure which must cause the listener to be
Willy Tarreaue0232f12015-04-05 18:01:06 +020048 * disabled, a positive or null value in case of success.
Willy Tarreaubaaee002006-06-26 02:48:02 +020049 */
Willy Tarreau87b09662015-04-03 00:22:06 +020050int frontend_accept(struct stream *s)
Willy Tarreaueb472682010-05-28 18:46:57 +020051{
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020052 struct session *sess = s->sess;
Willy Tarreaue0232f12015-04-05 18:01:06 +020053 struct connection *conn = objt_conn(sess->origin);
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020054 struct listener *l = sess->listener;
55 struct proxy *fe = sess->fe;
Willy Tarreaufb0afa72015-04-03 14:46:27 +020056
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020057 if ((fe->mode == PR_MODE_TCP || fe->mode == PR_MODE_HTTP)
58 && (!LIST_ISEMPTY(&fe->logsrvs))) {
59 if (likely(!LIST_ISEMPTY(&fe->logformat))) {
Willy Tarreaueb472682010-05-28 18:46:57 +020060 /* we have the client ip */
61 if (s->logs.logwait & LW_CLIP)
Willy Tarreaud79a3b22012-12-28 09:40:16 +010062 if (!(s->logs.logwait &= ~(LW_CLIP|LW_INIT)))
Willy Tarreaueb472682010-05-28 18:46:57 +020063 s->do_log(s);
Willy Tarreaua3445fc2010-05-20 16:17:07 +020064 }
Willy Tarreaua0a4b092019-07-17 11:25:46 +020065 else if (conn && !conn_get_src(conn)) {
66 send_log(fe, LOG_INFO, "Connect from unknown source to listener %d (%s/%s)\n",
67 l->luid, fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
68 }
Willy Tarreaue0232f12015-04-05 18:01:06 +020069 else if (conn) {
Willy Tarreaueb472682010-05-28 18:46:57 +020070 char pn[INET6_ADDRSTRLEN], sn[INET6_ADDRSTRLEN];
Willy Tarreaua0a4b092019-07-17 11:25:46 +020071 int port;
Willy Tarreaubaaee002006-06-26 02:48:02 +020072
Willy Tarreau44a7d8e2019-07-17 17:11:40 +020073 switch (addr_to_str(conn->src, pn, sizeof(pn))) {
Willy Tarreau631f01c2011-09-05 00:36:48 +020074 case AF_INET:
75 case AF_INET6:
Willy Tarreaua0a4b092019-07-17 11:25:46 +020076 if (conn_get_dst(conn)) {
Willy Tarreau44a7d8e2019-07-17 17:11:40 +020077 addr_to_str(conn->dst, sn, sizeof(sn));
78 port = get_host_port(conn->dst);
Willy Tarreaua0a4b092019-07-17 11:25:46 +020079 } else {
80 strcpy(sn, "undetermined address");
81 port = 0;
82 }
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020083 send_log(fe, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
Willy Tarreau44a7d8e2019-07-17 17:11:40 +020084 pn, get_host_port(conn->src),
Willy Tarreaua0a4b092019-07-17 11:25:46 +020085 sn, port,
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020086 fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
Willy Tarreau631f01c2011-09-05 00:36:48 +020087 break;
88 case AF_UNIX:
89 /* UNIX socket, only the destination is known */
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020090 send_log(fe, LOG_INFO, "Connect to unix:%d (%s/%s)\n",
Willy Tarreaufb0afa72015-04-03 14:46:27 +020091 l->luid,
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020092 fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
Willy Tarreau631f01c2011-09-05 00:36:48 +020093 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +020094 }
Willy Tarreaueb472682010-05-28 18:46:57 +020095 }
96 }
Willy Tarreaubaaee002006-06-26 02:48:02 +020097
Willy Tarreaue0232f12015-04-05 18:01:06 +020098 if (unlikely((global.mode & MODE_DEBUG) && conn &&
99 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
Willy Tarreau631f01c2011-09-05 00:36:48 +0200100 char pn[INET6_ADDRSTRLEN];
Willy Tarreau9c266802016-12-04 19:05:24 +0100101 char alpn[16] = "<none>";
Willy Tarreau20814ff2017-09-15 11:43:32 +0200102 const char *alpn_str = NULL;
103 int alpn_len;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200104
Willy Tarreau20814ff2017-09-15 11:43:32 +0200105 /* try to report the ALPN value when available (also works for NPN) */
Willy Tarreaua0a4b092019-07-17 11:25:46 +0200106 if (conn == cs_conn(objt_cs(s->si[0].end))) {
Willy Tarreau20814ff2017-09-15 11:43:32 +0200107 if (conn_get_alpn(conn, &alpn_str, &alpn_len) && alpn_str) {
108 int len = MIN(alpn_len, sizeof(alpn) - 1);
109 memcpy(alpn, alpn_str, len);
110 alpn[len] = 0;
111 }
Willy Tarreau9c266802016-12-04 19:05:24 +0100112 }
113
Willy Tarreaua0a4b092019-07-17 11:25:46 +0200114 if (!conn_get_src(conn)) {
115 chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [listener:%d] ALPN=%s\n",
116 s->uniq_id, fe->id, (unsigned short)l->fd, (unsigned short)conn->handle.fd,
117 l->luid, alpn);
118 }
Willy Tarreau44a7d8e2019-07-17 17:11:40 +0200119 else switch (addr_to_str(conn->src, pn, sizeof(pn))) {
Willy Tarreau631f01c2011-09-05 00:36:48 +0200120 case AF_INET:
121 case AF_INET6:
Willy Tarreau9c266802016-12-04 19:05:24 +0100122 chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [%s:%d] ALPN=%s\n",
Willy Tarreau585744b2017-08-24 14:31:19 +0200123 s->uniq_id, fe->id, (unsigned short)l->fd, (unsigned short)conn->handle.fd,
Willy Tarreau44a7d8e2019-07-17 17:11:40 +0200124 pn, get_host_port(conn->src), alpn);
Willy Tarreau631f01c2011-09-05 00:36:48 +0200125 break;
126 case AF_UNIX:
127 /* UNIX socket, only the destination is known */
Willy Tarreau9c266802016-12-04 19:05:24 +0100128 chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [unix:%d] ALPN=%s\n",
Willy Tarreau585744b2017-08-24 14:31:19 +0200129 s->uniq_id, fe->id, (unsigned short)l->fd, (unsigned short)conn->handle.fd,
Willy Tarreau9c266802016-12-04 19:05:24 +0100130 l->luid, alpn);
Willy Tarreau631f01c2011-09-05 00:36:48 +0200131 break;
Emeric Brunab844ea2010-10-22 16:33:18 +0200132 }
Willy Tarreau9a2d1542008-08-30 12:31:07 +0200133
Willy Tarreau2e8ab6b2020-03-14 11:03:20 +0100134 DISGUISE(write(1, trash.area, trash.data));
Willy Tarreaueb472682010-05-28 18:46:57 +0200135 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200136
Willy Tarreaue36cbcb2015-04-03 15:40:56 +0200137 if (fe->mode == PR_MODE_HTTP)
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100138 s->req.flags |= CF_READ_DONTWAIT; /* one read is usually enough */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200139
Willy Tarreau0a6bed22016-12-04 18:39:22 +0100140 if (unlikely(fe->nb_req_cap > 0)) {
Willy Tarreaubafbe012017-11-24 17:34:44 +0100141 if ((s->req_cap = pool_alloc(fe->req_cap_pool)) == NULL)
Willy Tarreau0a6bed22016-12-04 18:39:22 +0100142 goto out_return; /* no memory */
143 memset(s->req_cap, 0, fe->nb_req_cap * sizeof(void *));
144 }
145
146 if (unlikely(fe->nb_rsp_cap > 0)) {
Willy Tarreaubafbe012017-11-24 17:34:44 +0100147 if ((s->res_cap = pool_alloc(fe->rsp_cap_pool)) == NULL)
Willy Tarreau0a6bed22016-12-04 18:39:22 +0100148 goto out_free_reqcap; /* no memory */
149 memset(s->res_cap, 0, fe->nb_rsp_cap * sizeof(void *));
150 }
151
152 if (fe->http_needed) {
153 /* we have to allocate header indexes only if we know
154 * that we may make use of them. This of course includes
155 * (mode == PR_MODE_HTTP).
156 */
157 if (unlikely(!http_alloc_txn(s)))
158 goto out_free_rspcap; /* no memory */
159
160 /* and now initialize the HTTP transaction state */
161 http_init_txn(s);
162 }
163
Willy Tarreau81f9aa32010-06-01 17:45:26 +0200164 /* everything's OK, let's go on */
Willy Tarreaueb472682010-05-28 18:46:57 +0200165 return 1;
Willy Tarreau8ced9a42007-11-04 17:51:50 +0100166
167 /* Error unrolling */
Willy Tarreau35a09942010-06-01 17:12:40 +0200168 out_free_rspcap:
Willy Tarreaubafbe012017-11-24 17:34:44 +0100169 pool_free(fe->rsp_cap_pool, s->res_cap);
Willy Tarreau35a09942010-06-01 17:12:40 +0200170 out_free_reqcap:
Willy Tarreaubafbe012017-11-24 17:34:44 +0100171 pool_free(fe->req_cap_pool, s->req_cap);
Willy Tarreauabe8ea52010-11-11 10:56:04 +0100172 out_return:
Willy Tarreaueb472682010-05-28 18:46:57 +0200173 return -1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200174}
175
Willy Tarreaud6896bc2013-01-07 22:48:29 +0100176/************************************************************************/
177/* All supported sample and ACL keywords must be declared here. */
178/************************************************************************/
179
Willy Tarreaua5e37562011-12-16 17:06:15 +0100180/* set temp integer to the id of the frontend */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200181static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +0200182smp_fetch_fe_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +0200183{
Willy Tarreauf853c462012-04-23 18:53:56 +0200184 smp->flags = SMP_F_VOL_SESS;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +0200185 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +0200186 smp->data.u.sint = smp->sess->fe->uuid;
Emeric Brun5d16eda2010-01-04 15:47:45 +0100187 return 1;
188}
189
Marcin Deranekd2471c22016-12-12 14:08:05 +0100190/* set string to the name of the frontend */
191static int
192smp_fetch_fe_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
193{
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200194 smp->data.u.str.area = (char *)smp->sess->fe->id;
195 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +0100196 return 0;
197
198 smp->data.type = SMP_T_STR;
199 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200200 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +0100201 return 1;
202}
203
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200204/* set string to the name of the default backend */
205static int
206smp_fetch_fe_defbe(const struct arg *args, struct sample *smp, const char *kw, void *private)
207{
208 if (!smp->sess->fe->defbe.be)
209 return 0;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200210 smp->data.u.str.area = (char *)smp->sess->fe->defbe.be->id;
211 if (!smp->data.u.str.area)
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200212 return 0;
213
214 smp->data.type = SMP_T_STR;
215 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200216 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200217 return 1;
218}
219
Nenad Merdanovicad9a7e92016-10-03 04:57:37 +0200220/* set temp integer to the number of HTTP requests per second reaching the frontend.
221 * Accepts exactly 1 argument. Argument is a frontend, other types will cause
222 * an undefined behaviour.
223 */
224static int
225smp_fetch_fe_req_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
226{
227 smp->flags = SMP_F_VOL_TEST;
228 smp->data.type = SMP_T_SINT;
229 smp->data.u.sint = read_freq_ctr(&args->data.prx->fe_req_per_sec);
230 return 1;
231}
232
Willy Tarreau34db1082012-04-19 17:16:54 +0200233/* set temp integer to the number of connections per second reaching the frontend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +0200234 * Accepts exactly 1 argument. Argument is a frontend, other types will cause
Willy Tarreau34db1082012-04-19 17:16:54 +0200235 * an undefined behaviour.
236 */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200237static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +0200238smp_fetch_fe_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau662b2d82007-05-08 19:56:15 +0200239{
Willy Tarreau37406352012-04-23 16:16:37 +0200240 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +0200241 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +0200242 smp->data.u.sint = read_freq_ctr(&args->data.prx->fe_sess_per_sec);
Emeric Brun5d16eda2010-01-04 15:47:45 +0100243 return 1;
244}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100245
Willy Tarreau34db1082012-04-19 17:16:54 +0200246/* set temp integer to the number of concurrent connections on the frontend
Willy Tarreau0146c2e2012-04-20 11:37:56 +0200247 * Accepts exactly 1 argument. Argument is a frontend, other types will cause
Willy Tarreau34db1082012-04-19 17:16:54 +0200248 * an undefined behaviour.
249 */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200250static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +0200251smp_fetch_fe_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau8797c062007-05-07 00:55:35 +0200252{
Willy Tarreau37406352012-04-23 16:16:37 +0200253 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +0200254 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +0200255 smp->data.u.sint = args->data.prx->feconn;
Krzysztof Piotr Oledzki346f76d2010-01-12 21:59:30 +0100256 return 1;
257}
258
Willy Tarreau8797c062007-05-07 00:55:35 +0200259
Willy Tarreau61612d42012-04-19 18:42:05 +0200260/* Note: must not be declared <const> as its list will be overwritten.
261 * Please take care of keeping this list alphabetically sorted.
262 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200263static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +0200264 { "fe_conn", smp_fetch_fe_conn, ARG1(1,FE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200265 { "fe_defbe", smp_fetch_fe_defbe, 0, NULL, SMP_T_STR, SMP_USE_FTEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +0200266 { "fe_id", smp_fetch_fe_id, 0, NULL, SMP_T_SINT, SMP_USE_FTEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +0100267 { "fe_name", smp_fetch_fe_name, 0, NULL, SMP_T_STR, SMP_USE_FTEND, },
Nenad Merdanovicad9a7e92016-10-03 04:57:37 +0200268 { "fe_req_rate", smp_fetch_fe_req_rate, ARG1(1,FE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +0200269 { "fe_sess_rate", smp_fetch_fe_sess_rate, ARG1(1,FE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Willy Tarreaud6896bc2013-01-07 22:48:29 +0100270 { /* END */ },
271}};
272
Willy Tarreau0108d902018-11-25 19:14:37 +0100273INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
Willy Tarreaud6896bc2013-01-07 22:48:29 +0100274
275/* Note: must not be declared <const> as its list will be overwritten.
276 * Please take care of keeping this list alphabetically sorted.
277 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200278static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud6896bc2013-01-07 22:48:29 +0100279 { /* END */ },
Willy Tarreau8797c062007-05-07 00:55:35 +0200280}};
281
Willy Tarreau0108d902018-11-25 19:14:37 +0100282INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreau8797c062007-05-07 00:55:35 +0200283
Willy Tarreaubaaee002006-06-26 02:48:02 +0200284/*
285 * Local variables:
286 * c-indent-level: 8
287 * c-basic-offset: 8
288 * End:
289 */