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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 Tarreauc7e42382012-08-24 19:22:53 +020025#include <common/chunk.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020026#include <common/compat.h>
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020027#include <common/config.h>
Willy Tarreau8b0cbf92010-10-15 23:23:19 +020028#include <common/debug.h>
29#include <common/standard.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020030#include <common/time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020031
Willy Tarreaubaaee002006-06-26 02:48:02 +020032#include <types/global.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020033
Willy Tarreau8797c062007-05-07 00:55:35 +020034#include <proto/acl.h>
Willy Tarreau61612d42012-04-19 18:42:05 +020035#include <proto/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020036#include <proto/channel.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020037#include <proto/fd.h>
Willy Tarreau03fa5df2010-05-24 21:02:37 +020038#include <proto/frontend.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020039#include <proto/log.h>
Willy Tarreaue5f20dc2006-12-03 15:21:35 +010040#include <proto/hdr_idx.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020041#include <proto/proto_tcp.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020042#include <proto/proto_http.h>
Willy Tarreau7f062c42009-03-05 18:43:00 +010043#include <proto/proxy.h>
Willy Tarreaud6896bc2013-01-07 22:48:29 +010044#include <proto/sample.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020045#include <proto/stream.h>
Willy Tarreaudded32d2008-11-30 19:48:07 +010046#include <proto/stream_interface.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020047#include <proto/task.h>
48
Willy Tarreau87b09662015-04-03 00:22:06 +020049/* Finish a stream accept() for a proxy (TCP or HTTP). It returns a negative
Willy Tarreauabe8ea52010-11-11 10:56:04 +010050 * value in case of a critical failure which must cause the listener to be
Willy Tarreaue0232f12015-04-05 18:01:06 +020051 * disabled, a positive or null value in case of success.
Willy Tarreaubaaee002006-06-26 02:48:02 +020052 */
Willy Tarreau87b09662015-04-03 00:22:06 +020053int frontend_accept(struct stream *s)
Willy Tarreaueb472682010-05-28 18:46:57 +020054{
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020055 struct session *sess = s->sess;
Willy Tarreaue0232f12015-04-05 18:01:06 +020056 struct connection *conn = objt_conn(sess->origin);
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020057 struct listener *l = sess->listener;
58 struct proxy *fe = sess->fe;
Willy Tarreaufb0afa72015-04-03 14:46:27 +020059
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020060 if ((fe->mode == PR_MODE_TCP || fe->mode == PR_MODE_HTTP)
61 && (!LIST_ISEMPTY(&fe->logsrvs))) {
62 if (likely(!LIST_ISEMPTY(&fe->logformat))) {
Willy Tarreaueb472682010-05-28 18:46:57 +020063 /* we have the client ip */
64 if (s->logs.logwait & LW_CLIP)
Willy Tarreaud79a3b22012-12-28 09:40:16 +010065 if (!(s->logs.logwait &= ~(LW_CLIP|LW_INIT)))
Willy Tarreaueb472682010-05-28 18:46:57 +020066 s->do_log(s);
Willy Tarreaua3445fc2010-05-20 16:17:07 +020067 }
Willy Tarreaue0232f12015-04-05 18:01:06 +020068 else if (conn) {
Willy Tarreaueb472682010-05-28 18:46:57 +020069 char pn[INET6_ADDRSTRLEN], sn[INET6_ADDRSTRLEN];
Willy Tarreau14c8aac2007-05-08 19:46:30 +020070
Willy Tarreaub363a1f2013-10-01 10:45:07 +020071 conn_get_from_addr(conn);
72 conn_get_to_addr(conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +020073
Willy Tarreaub363a1f2013-10-01 10:45:07 +020074 switch (addr_to_str(&conn->addr.from, pn, sizeof(pn))) {
Willy Tarreau631f01c2011-09-05 00:36:48 +020075 case AF_INET:
76 case AF_INET6:
Willy Tarreaub363a1f2013-10-01 10:45:07 +020077 addr_to_str(&conn->addr.to, sn, sizeof(sn));
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020078 send_log(fe, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
Willy Tarreaub363a1f2013-10-01 10:45:07 +020079 pn, get_host_port(&conn->addr.from),
80 sn, get_host_port(&conn->addr.to),
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020081 fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
Willy Tarreau631f01c2011-09-05 00:36:48 +020082 break;
83 case AF_UNIX:
84 /* UNIX socket, only the destination is known */
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020085 send_log(fe, LOG_INFO, "Connect to unix:%d (%s/%s)\n",
Willy Tarreaufb0afa72015-04-03 14:46:27 +020086 l->luid,
Willy Tarreaue36cbcb2015-04-03 15:40:56 +020087 fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
Willy Tarreau631f01c2011-09-05 00:36:48 +020088 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +020089 }
Willy Tarreaueb472682010-05-28 18:46:57 +020090 }
91 }
Willy Tarreaubaaee002006-06-26 02:48:02 +020092
Willy Tarreaue0232f12015-04-05 18:01:06 +020093 if (unlikely((global.mode & MODE_DEBUG) && conn &&
94 (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
Willy Tarreau631f01c2011-09-05 00:36:48 +020095 char pn[INET6_ADDRSTRLEN];
Willy Tarreau9c266802016-12-04 19:05:24 +010096 char alpn[16] = "<none>";
Willy Tarreau20814ff2017-09-15 11:43:32 +020097 const char *alpn_str = NULL;
98 int alpn_len;
Willy Tarreaubaaee002006-06-26 02:48:02 +020099
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200100 conn_get_from_addr(conn);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200101
Willy Tarreau20814ff2017-09-15 11:43:32 +0200102 /* try to report the ALPN value when available (also works for NPN) */
103
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200104 if (conn && conn == cs_conn(objt_cs(s->si[0].end))) {
Willy Tarreau20814ff2017-09-15 11:43:32 +0200105 if (conn_get_alpn(conn, &alpn_str, &alpn_len) && alpn_str) {
106 int len = MIN(alpn_len, sizeof(alpn) - 1);
107 memcpy(alpn, alpn_str, len);
108 alpn[len] = 0;
109 }
Willy Tarreau9c266802016-12-04 19:05:24 +0100110 }
111
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200112 switch (addr_to_str(&conn->addr.from, pn, sizeof(pn))) {
Willy Tarreau631f01c2011-09-05 00:36:48 +0200113 case AF_INET:
114 case AF_INET6:
Willy Tarreau9c266802016-12-04 19:05:24 +0100115 chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [%s:%d] ALPN=%s\n",
Willy Tarreau585744b2017-08-24 14:31:19 +0200116 s->uniq_id, fe->id, (unsigned short)l->fd, (unsigned short)conn->handle.fd,
Willy Tarreau9c266802016-12-04 19:05:24 +0100117 pn, get_host_port(&conn->addr.from), alpn);
Willy Tarreau631f01c2011-09-05 00:36:48 +0200118 break;
119 case AF_UNIX:
120 /* UNIX socket, only the destination is known */
Willy Tarreau9c266802016-12-04 19:05:24 +0100121 chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [unix:%d] ALPN=%s\n",
Willy Tarreau585744b2017-08-24 14:31:19 +0200122 s->uniq_id, fe->id, (unsigned short)l->fd, (unsigned short)conn->handle.fd,
Willy Tarreau9c266802016-12-04 19:05:24 +0100123 l->luid, alpn);
Willy Tarreau631f01c2011-09-05 00:36:48 +0200124 break;
Emeric Brunab844ea2010-10-22 16:33:18 +0200125 }
Willy Tarreau9a2d1542008-08-30 12:31:07 +0200126
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200127 shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
Willy Tarreaueb472682010-05-28 18:46:57 +0200128 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200129
Willy Tarreaue36cbcb2015-04-03 15:40:56 +0200130 if (fe->mode == PR_MODE_HTTP)
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100131 s->req.flags |= CF_READ_DONTWAIT; /* one read is usually enough */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200132
Willy Tarreau0a6bed22016-12-04 18:39:22 +0100133 if (unlikely(fe->nb_req_cap > 0)) {
Willy Tarreaubafbe012017-11-24 17:34:44 +0100134 if ((s->req_cap = pool_alloc(fe->req_cap_pool)) == NULL)
Willy Tarreau0a6bed22016-12-04 18:39:22 +0100135 goto out_return; /* no memory */
136 memset(s->req_cap, 0, fe->nb_req_cap * sizeof(void *));
137 }
138
139 if (unlikely(fe->nb_rsp_cap > 0)) {
Willy Tarreaubafbe012017-11-24 17:34:44 +0100140 if ((s->res_cap = pool_alloc(fe->rsp_cap_pool)) == NULL)
Willy Tarreau0a6bed22016-12-04 18:39:22 +0100141 goto out_free_reqcap; /* no memory */
142 memset(s->res_cap, 0, fe->nb_rsp_cap * sizeof(void *));
143 }
144
145 if (fe->http_needed) {
146 /* we have to allocate header indexes only if we know
147 * that we may make use of them. This of course includes
148 * (mode == PR_MODE_HTTP).
149 */
150 if (unlikely(!http_alloc_txn(s)))
151 goto out_free_rspcap; /* no memory */
152
153 /* and now initialize the HTTP transaction state */
154 http_init_txn(s);
155 }
156
Willy Tarreau81f9aa32010-06-01 17:45:26 +0200157 /* everything's OK, let's go on */
Willy Tarreaueb472682010-05-28 18:46:57 +0200158 return 1;
Willy Tarreau8ced9a42007-11-04 17:51:50 +0100159
160 /* Error unrolling */
Willy Tarreau35a09942010-06-01 17:12:40 +0200161 out_free_rspcap:
Willy Tarreaubafbe012017-11-24 17:34:44 +0100162 pool_free(fe->rsp_cap_pool, s->res_cap);
Willy Tarreau35a09942010-06-01 17:12:40 +0200163 out_free_reqcap:
Willy Tarreaubafbe012017-11-24 17:34:44 +0100164 pool_free(fe->req_cap_pool, s->req_cap);
Willy Tarreauabe8ea52010-11-11 10:56:04 +0100165 out_return:
Willy Tarreaueb472682010-05-28 18:46:57 +0200166 return -1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200167}
168
Willy Tarreaud6896bc2013-01-07 22:48:29 +0100169/************************************************************************/
170/* All supported sample and ACL keywords must be declared here. */
171/************************************************************************/
172
Willy Tarreaua5e37562011-12-16 17:06:15 +0100173/* set temp integer to the id of the frontend */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200174static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +0200175smp_fetch_fe_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +0200176{
Willy Tarreauf853c462012-04-23 18:53:56 +0200177 smp->flags = SMP_F_VOL_SESS;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +0200178 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +0200179 smp->data.u.sint = smp->sess->fe->uuid;
Emeric Brun5d16eda2010-01-04 15:47:45 +0100180 return 1;
181}
182
Marcin Deranekd2471c22016-12-12 14:08:05 +0100183/* set string to the name of the frontend */
184static int
185smp_fetch_fe_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
186{
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200187 smp->data.u.str.area = (char *)smp->sess->fe->id;
188 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +0100189 return 0;
190
191 smp->data.type = SMP_T_STR;
192 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200193 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +0100194 return 1;
195}
196
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200197/* set string to the name of the default backend */
198static int
199smp_fetch_fe_defbe(const struct arg *args, struct sample *smp, const char *kw, void *private)
200{
201 if (!smp->sess->fe->defbe.be)
202 return 0;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200203 smp->data.u.str.area = (char *)smp->sess->fe->defbe.be->id;
204 if (!smp->data.u.str.area)
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200205 return 0;
206
207 smp->data.type = SMP_T_STR;
208 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200209 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200210 return 1;
211}
212
Nenad Merdanovicad9a7e92016-10-03 04:57:37 +0200213/* set temp integer to the number of HTTP requests per second reaching the frontend.
214 * Accepts exactly 1 argument. Argument is a frontend, other types will cause
215 * an undefined behaviour.
216 */
217static int
218smp_fetch_fe_req_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
219{
220 smp->flags = SMP_F_VOL_TEST;
221 smp->data.type = SMP_T_SINT;
222 smp->data.u.sint = read_freq_ctr(&args->data.prx->fe_req_per_sec);
223 return 1;
224}
225
Willy Tarreau34db1082012-04-19 17:16:54 +0200226/* set temp integer to the number of connections per second reaching the frontend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +0200227 * Accepts exactly 1 argument. Argument is a frontend, other types will cause
Willy Tarreau34db1082012-04-19 17:16:54 +0200228 * an undefined behaviour.
229 */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200230static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +0200231smp_fetch_fe_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau662b2d82007-05-08 19:56:15 +0200232{
Willy Tarreau37406352012-04-23 16:16:37 +0200233 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +0200234 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +0200235 smp->data.u.sint = read_freq_ctr(&args->data.prx->fe_sess_per_sec);
Emeric Brun5d16eda2010-01-04 15:47:45 +0100236 return 1;
237}
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100238
Willy Tarreau34db1082012-04-19 17:16:54 +0200239/* set temp integer to the number of concurrent connections on the frontend
Willy Tarreau0146c2e2012-04-20 11:37:56 +0200240 * Accepts exactly 1 argument. Argument is a frontend, other types will cause
Willy Tarreau34db1082012-04-19 17:16:54 +0200241 * an undefined behaviour.
242 */
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200243static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +0200244smp_fetch_fe_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau8797c062007-05-07 00:55:35 +0200245{
Willy Tarreau37406352012-04-23 16:16:37 +0200246 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +0200247 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +0200248 smp->data.u.sint = args->data.prx->feconn;
Krzysztof Piotr Oledzki346f76d2010-01-12 21:59:30 +0100249 return 1;
250}
251
Willy Tarreau8797c062007-05-07 00:55:35 +0200252
Willy Tarreau61612d42012-04-19 18:42:05 +0200253/* Note: must not be declared <const> as its list will be overwritten.
254 * Please take care of keeping this list alphabetically sorted.
255 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200256static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +0200257 { "fe_conn", smp_fetch_fe_conn, ARG1(1,FE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Marcin Deranek9a66dfb2018-04-13 14:37:50 +0200258 { "fe_defbe", smp_fetch_fe_defbe, 0, NULL, SMP_T_STR, SMP_USE_FTEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +0200259 { "fe_id", smp_fetch_fe_id, 0, NULL, SMP_T_SINT, SMP_USE_FTEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +0100260 { "fe_name", smp_fetch_fe_name, 0, NULL, SMP_T_STR, SMP_USE_FTEND, },
Nenad Merdanovicad9a7e92016-10-03 04:57:37 +0200261 { "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 +0200262 { "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 +0100263 { /* END */ },
264}};
265
266
267/* Note: must not be declared <const> as its list will be overwritten.
268 * Please take care of keeping this list alphabetically sorted.
269 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200270static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud6896bc2013-01-07 22:48:29 +0100271 { /* END */ },
Willy Tarreau8797c062007-05-07 00:55:35 +0200272}};
273
274
275__attribute__((constructor))
Willy Tarreau03fa5df2010-05-24 21:02:37 +0200276static void __frontend_init(void)
Willy Tarreau8797c062007-05-07 00:55:35 +0200277{
Willy Tarreaud6896bc2013-01-07 22:48:29 +0100278 sample_register_fetches(&smp_kws);
Willy Tarreau8797c062007-05-07 00:55:35 +0200279 acl_register_keywords(&acl_kws);
280}
281
282
Willy Tarreaubaaee002006-06-26 02:48:02 +0200283/*
284 * Local variables:
285 * c-indent-level: 8
286 * c-basic-offset: 8
287 * End:
288 */