blob: 091772d40a02dd510a7ca3d193d6b334dc9966f2 [file] [log] [blame]
Willy Tarreaue6b98942007-10-29 01:09:36 +01001/*
2 * AF_INET/AF_INET6 SOCK_STREAM protocol layer (tcp)
3 *
Willy Tarreaud4c33c82013-01-07 21:59:07 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaue6b98942007-10-29 01:09:36 +01005 *
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
Baptiste Assmann39a5f222016-08-08 14:12:08 +020013/* this is to have tcp_info defined on systems using musl
14 * library, such as Alpine Linux
15 */
16#define _GNU_SOURCE
17
Willy Tarreaue6b98942007-10-29 01:09:36 +010018#include <ctype.h>
19#include <errno.h>
20#include <fcntl.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <time.h>
25
26#include <sys/param.h>
27#include <sys/socket.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010028#include <sys/types.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010029
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040030#include <netinet/tcp.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020031#include <netinet/in.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040032
Willy Tarreau122eba92020-06-04 10:15:32 +020033#include <haproxy/action-t.h>
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020034#include <haproxy/api.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020035#include <haproxy/arg.h>
Willy Tarreauf1d32c42020-06-04 21:07:02 +020036#include <haproxy/channel.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020037#include <haproxy/connection.h>
Willy Tarreau8d366972020-05-27 16:10:29 +020038#include <haproxy/errors.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020039#include <haproxy/fd.h>
Willy Tarreauf268ee82020-06-04 17:05:57 +020040#include <haproxy/global.h>
Willy Tarreauc761f842020-06-04 11:40:28 +020041#include <haproxy/http_rules.h>
Willy Tarreau853b2972020-05-27 18:01:47 +020042#include <haproxy/list.h>
Willy Tarreau213e9902020-06-04 14:58:24 +020043#include <haproxy/listener.h>
Willy Tarreauaeed4a82020-06-04 22:01:04 +020044#include <haproxy/log.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020045#include <haproxy/namespace.h>
46#include <haproxy/port_range.h>
47#include <haproxy/proto_tcp.h>
48#include <haproxy/protocol.h>
Willy Tarreaua264d962020-06-04 22:29:18 +020049#include <haproxy/proxy-t.h>
Willy Tarreaue6ce10b2020-06-04 15:33:47 +020050#include <haproxy/sample.h>
Willy Tarreau1e56f922020-06-04 23:20:13 +020051#include <haproxy/server.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020052#include <haproxy/stream-t.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020053#include <haproxy/tcp_rules.h>
Willy Tarreau48fbcae2020-06-03 18:09:46 +020054#include <haproxy/tools.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010055
Willy Tarreaue6b98942007-10-29 01:09:36 +010056
Emeric Bruncf20bf12010-10-22 16:06:11 +020057static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
58static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020059static void tcpv4_add_listener(struct listener *listener, int port);
60static void tcpv6_add_listener(struct listener *listener, int port);
Willy Tarreaue6b98942007-10-29 01:09:36 +010061
62/* Note: must not be declared <const> as its list will be overwritten */
63static struct protocol proto_tcpv4 = {
64 .name = "tcpv4",
65 .sock_domain = AF_INET,
66 .sock_type = SOCK_STREAM,
67 .sock_prot = IPPROTO_TCP,
68 .sock_family = AF_INET,
69 .sock_addrlen = sizeof(struct sockaddr_in),
70 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020071 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020072 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020073 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010074 .bind_all = tcp_bind_listeners,
75 .unbind_all = unbind_all_listeners,
76 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020077 .get_src = tcp_get_src,
78 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +020079 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020080 .add = tcpv4_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010081 .listeners = LIST_HEAD_INIT(proto_tcpv4.listeners),
82 .nb_listeners = 0,
83};
84
Willy Tarreau0108d902018-11-25 19:14:37 +010085INITCALL1(STG_REGISTER, protocol_register, &proto_tcpv4);
86
Willy Tarreaue6b98942007-10-29 01:09:36 +010087/* Note: must not be declared <const> as its list will be overwritten */
88static struct protocol proto_tcpv6 = {
89 .name = "tcpv6",
90 .sock_domain = AF_INET6,
91 .sock_type = SOCK_STREAM,
92 .sock_prot = IPPROTO_TCP,
93 .sock_family = AF_INET6,
94 .sock_addrlen = sizeof(struct sockaddr_in6),
95 .l3_addrlen = 128/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020096 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020097 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020098 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010099 .bind_all = tcp_bind_listeners,
100 .unbind_all = unbind_all_listeners,
101 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +0200102 .get_src = tcp_get_src,
103 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +0200104 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +0200105 .add = tcpv6_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100106 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
107 .nb_listeners = 0,
108};
109
Willy Tarreau0108d902018-11-25 19:14:37 +0100110INITCALL1(STG_REGISTER, protocol_register, &proto_tcpv6);
111
Olivier Houchard153659f2017-04-05 22:39:56 +0200112/* Default TCP parameters, got by opening a temporary TCP socket. */
113#ifdef TCP_MAXSEG
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100114static THREAD_LOCAL int default_tcp_maxseg = -1;
115static THREAD_LOCAL int default_tcp6_maxseg = -1;
Olivier Houchard153659f2017-04-05 22:39:56 +0200116#endif
117
David du Colombier6f5ccb12011-03-10 22:26:24 +0100118/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100119 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
120 * - 0 : ignore remote address (may even be a NULL pointer)
121 * - 1 : use provided address
122 * - 2 : use provided port
123 * - 3 : use both
124 *
125 * The function supports multiple foreign binding methods :
126 * - linux_tproxy: we directly bind to the foreign address
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100127 * The second one can be used as a fallback for the first one.
128 * This function returns 0 when everything's OK, 1 if it could not bind, to the
129 * local address, 2 if it could not bind to the foreign address.
130 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100131int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100132{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100133 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100134 int foreign_ok = 0;
135 int ret;
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100136 static THREAD_LOCAL int ip_transp_working = 1;
137 static THREAD_LOCAL int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200138
David du Colombier65c17962012-07-13 14:34:59 +0200139 switch (local->ss_family) {
140 case AF_INET:
141 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200142 /* This deserves some explanation. Some platforms will support
143 * multiple combinations of certain methods, so we try the
144 * supported ones until one succeeds.
145 */
146 if (0
147#if defined(IP_TRANSPARENT)
148 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
149#endif
150#if defined(IP_FREEBIND)
151 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
152#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200153#if defined(IP_BINDANY)
154 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
155#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200156#if defined(SO_BINDANY)
157 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
158#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200159 )
David du Colombier65c17962012-07-13 14:34:59 +0200160 foreign_ok = 1;
161 else
162 ip_transp_working = 0;
163 }
164 break;
165 case AF_INET6:
166 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200167 if (0
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200168#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200169 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
170#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100171#if defined(IP_FREEBIND)
172 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
173#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200174#if defined(IPV6_BINDANY)
175 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
176#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200177#if defined(SO_BINDANY)
178 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
179#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200180 )
David du Colombier65c17962012-07-13 14:34:59 +0200181 foreign_ok = 1;
182 else
183 ip6_transp_working = 0;
184 }
185 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100186 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200187
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100188 if (flags) {
189 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200190 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100191 switch (remote->ss_family) {
192 case AF_INET:
193 if (flags & 1)
194 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
195 if (flags & 2)
196 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
197 break;
198 case AF_INET6:
199 if (flags & 1)
200 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
201 if (flags & 2)
202 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
203 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100204 default:
205 /* we don't want to try to bind to an unknown address family */
206 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100207 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100208 }
209
Simon Hormande072bd2011-06-24 15:11:37 +0900210 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100211 if (foreign_ok) {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200212 if (is_inet_addr(&bind_addr)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200213 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
214 if (ret < 0)
215 return 2;
216 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100217 }
218 else {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200219 if (is_inet_addr(local)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200220 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
221 if (ret < 0)
222 return 1;
223 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100224 }
225
226 if (!flags)
227 return 0;
228
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100229 if (!foreign_ok)
230 /* we could not bind to a foreign address */
231 return 2;
232
233 return 0;
234}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100235
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200236/* conn->dst MUST be valid */
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100237static int create_server_socket(struct connection *conn)
238{
Willy Tarreau529c1392014-12-24 13:47:55 +0100239 const struct netns_entry *ns = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100240
Willy Tarreaue5733232019-05-22 19:24:06 +0200241#ifdef USE_NS
Willy Tarreau529c1392014-12-24 13:47:55 +0100242 if (objt_server(conn->target)) {
243 if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
244 ns = conn->proxy_netns;
245 else
246 ns = __objt_server(conn->target)->netns;
247 }
248#endif
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200249 return my_socketat(ns, conn->dst->ss_family, SOCK_STREAM, IPPROTO_TCP);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100250}
Willy Tarreau9650f372009-08-16 14:02:45 +0200251
252/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200253 * This function initiates a TCP connection establishment to the target assigned
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200254 * to connection <conn> using (si->{target,dst}). A source address may be
255 * pointed to by conn->src in case of transparent proxying. Normal source
Willy Tarreau14f8e862012-08-30 22:23:13 +0200256 * bind addresses are still determined locally (due to the possible need of a
257 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100258 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100259 * supported. The <data> parameter is a boolean indicating whether there are data
260 * waiting for being sent or not, in order to adjust data write polling and on
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200261 * some platforms, the ability to avoid an empty initial ACK. The <flags> argument
262 * allows the caller to force using a delayed ACK when establishing the connection
Willy Tarreauf0837b22012-11-24 10:24:27 +0100263 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200264 * - CONNECT_DELACK_SMART_CONNECT = delayed ACK if backend has tcp-smart-connect, regardless of data
265 * - CONNECT_DELACK_ALWAYS = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200266 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200267 * Note that a pending send_proxy message accounts for data.
268 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200269 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +0200270 * - SF_ERR_NONE if everything's OK
271 * - SF_ERR_SRVTO if there are no more servers
272 * - SF_ERR_SRVCL if the connection was refused by the server
273 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
274 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
275 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +0100276 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100277 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200278 * The connection's fd is inserted only when SF_ERR_NONE is returned, otherwise
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100279 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200280 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100281
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200282int tcp_connect_server(struct connection *conn, int flags)
Willy Tarreau9650f372009-08-16 14:02:45 +0200283{
284 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100285 struct server *srv;
286 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100287 struct conn_src *src;
Willy Tarreau034c88c2017-01-23 23:36:45 +0100288 int use_fastopen = 0;
Alexander Liu2a54bb72019-05-22 19:44:48 +0800289 struct sockaddr_storage *addr;
Willy Tarreauac825402011-03-04 22:04:29 +0100290
Olivier Houchard637b6952018-11-23 14:23:07 +0100291 conn->flags |= CO_FL_WAIT_L4_CONN; /* connection in progress */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100292
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100293 switch (obj_type(conn->target)) {
294 case OBJ_TYPE_PROXY:
295 be = objt_proxy(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100296 srv = NULL;
297 break;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100298 case OBJ_TYPE_SERVER:
299 srv = objt_server(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100300 be = srv->proxy;
Willy Tarreau034c88c2017-01-23 23:36:45 +0100301 /* Make sure we check that we have data before activating
302 * TFO, or we could trigger a kernel issue whereby after
303 * a successful connect() == 0, any subsequent connect()
304 * will return EINPROGRESS instead of EISCONN.
305 */
306 use_fastopen = (srv->flags & SRV_F_FASTOPEN) &&
307 ((flags & (CONNECT_CAN_USE_TFO | CONNECT_HAS_DATA)) ==
308 (CONNECT_CAN_USE_TFO | CONNECT_HAS_DATA));
Willy Tarreauac825402011-03-04 22:04:29 +0100309 break;
310 default:
Willy Tarreau9ce70132014-01-24 16:08:19 +0100311 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200312 return SF_ERR_INTERNAL;
Willy Tarreauac825402011-03-04 22:04:29 +0100313 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200314
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200315 if (!conn->dst) {
316 conn->flags |= CO_FL_ERROR;
317 return SF_ERR_INTERNAL;
318 }
319
Willy Tarreau585744b2017-08-24 14:31:19 +0200320 fd = conn->handle.fd = create_server_socket(conn);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100321
322 if (fd == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200323 qfprintf(stderr, "Cannot get a server socket.\n");
324
Willy Tarreau9ce70132014-01-24 16:08:19 +0100325 if (errno == ENFILE) {
326 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200327 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100328 "Proxy %s reached system FD limit (maxsock=%d). Please check system tunables.\n",
329 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100330 }
331 else if (errno == EMFILE) {
332 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200333 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100334 "Proxy %s reached process FD limit (maxsock=%d). Please check 'ulimit-n' and restart.\n",
335 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100336 }
337 else if (errno == ENOBUFS || errno == ENOMEM) {
338 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200339 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100340 "Proxy %s reached system memory limit (maxsock=%d). Please check system tunables.\n",
341 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100342 }
343 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
344 conn->err_code = CO_ER_NOPROTO;
345 }
346 else
347 conn->err_code = CO_ER_SOCK_ERR;
348
Willy Tarreau9650f372009-08-16 14:02:45 +0200349 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100350 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200351 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200352 }
353
354 if (fd >= global.maxsock) {
355 /* do not log anything there, it's a normal condition when this option
356 * is used to serialize connections to a server !
357 */
Christopher Faulet767a84b2017-11-24 16:50:31 +0100358 ha_alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
Willy Tarreau9650f372009-08-16 14:02:45 +0200359 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100360 conn->err_code = CO_ER_CONF_FDLIM;
361 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200362 return SF_ERR_PRXCOND; /* it is a configuration limit */
Willy Tarreau9650f372009-08-16 14:02:45 +0200363 }
364
365 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900366 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200367 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
368 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100369 conn->err_code = CO_ER_SOCK_ERR;
370 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200371 return SF_ERR_INTERNAL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200372 }
373
William Lallemandc03eb012018-11-27 12:02:37 +0100374 if (master == 1 && (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)) {
375 ha_alert("Cannot set CLOEXEC on client socket.\n");
376 close(fd);
377 conn->err_code = CO_ER_SOCK_ERR;
378 conn->flags |= CO_FL_ERROR;
379 return SF_ERR_INTERNAL;
380 }
381
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900382 if (be->options & PR_O_TCP_SRV_KA) {
Simon Hormande072bd2011-06-24 15:11:37 +0900383 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200384
Willy Tarreau52543212020-07-09 05:58:51 +0200385#ifdef TCP_KEEPCNT
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900386 if (be->srvtcpka_cnt)
387 setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &be->srvtcpka_cnt, sizeof(be->srvtcpka_cnt));
Willy Tarreau52543212020-07-09 05:58:51 +0200388#endif
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900389
Willy Tarreau52543212020-07-09 05:58:51 +0200390#ifdef TCP_KEEPIDLE
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900391 if (be->srvtcpka_idle)
392 setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &be->srvtcpka_idle, sizeof(be->srvtcpka_idle));
Willy Tarreau52543212020-07-09 05:58:51 +0200393#endif
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900394
Willy Tarreau52543212020-07-09 05:58:51 +0200395#ifdef TCP_KEEPINTVL
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900396 if (be->srvtcpka_intvl)
397 setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &be->srvtcpka_intvl, sizeof(be->srvtcpka_intvl));
Willy Tarreau52543212020-07-09 05:58:51 +0200398#endif
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900399 }
400
Willy Tarreau9650f372009-08-16 14:02:45 +0200401 /* allow specific binding :
402 * - server-specific at first
403 * - proxy-specific next
404 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100405 if (srv && srv->conn_src.opts & CO_SRC_BIND)
406 src = &srv->conn_src;
407 else if (be->conn_src.opts & CO_SRC_BIND)
408 src = &be->conn_src;
409 else
410 src = NULL;
411
412 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200413 int ret, flags = 0;
414
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200415 if (conn->src && is_inet_addr(conn->src)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100416 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100417 case CO_SRC_TPROXY_CLI:
Christopher Faulet21ddc742020-07-01 15:26:14 +0200418 conn_set_private(conn);
Willy Tarreau387ebf82015-08-04 19:24:13 +0200419 /* fall through */
420 case CO_SRC_TPROXY_ADDR:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200421 flags = 3;
422 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100423 case CO_SRC_TPROXY_CIP:
424 case CO_SRC_TPROXY_DYN:
Christopher Faulet21ddc742020-07-01 15:26:14 +0200425 conn_set_private(conn);
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200426 flags = 1;
427 break;
428 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200429 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200430
Willy Tarreau9650f372009-08-16 14:02:45 +0200431#ifdef SO_BINDTODEVICE
432 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100433 if (src->iface_name)
434 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200435#endif
436
Willy Tarreaua4380b42012-12-08 22:49:11 +0100437 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200438 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100439 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200440
441 ret = 1;
Vincent Bernat6e615892016-05-18 16:17:44 +0200442 memcpy(&sa, &src->source_addr, sizeof(sa));
Willy Tarreau9650f372009-08-16 14:02:45 +0200443
444 do {
445 /* note: in case of retry, we may have to release a previously
446 * allocated port, hence this loop's construct.
447 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200448 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
449 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200450
451 if (!attempts)
452 break;
453 attempts--;
454
Willy Tarreaua4380b42012-12-08 22:49:11 +0100455 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100456 if (!fdinfo[fd].local_port) {
457 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200458 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100459 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200460
Willy Tarreaua4380b42012-12-08 22:49:11 +0100461 fdinfo[fd].port_range = src->sport_range;
462 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200463
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200464 ret = tcp_bind_socket(fd, flags, &sa, conn->src);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100465 if (ret != 0)
466 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200467 } while (ret != 0); /* binding NOK */
468 }
469 else {
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000470#ifdef IP_BIND_ADDRESS_NO_PORT
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100471 static THREAD_LOCAL int bind_address_no_port = 1;
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000472 setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
473#endif
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200474 ret = tcp_bind_socket(fd, flags, &src->source_addr, conn->src);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100475 if (ret != 0)
476 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200477 }
478
Willy Tarreaua4380b42012-12-08 22:49:11 +0100479 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200480 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
481 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200482 close(fd);
483
Willy Tarreau9650f372009-08-16 14:02:45 +0200484 if (ret == 1) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100485 ha_alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
486 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200487 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100488 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200489 be->id);
490 } else {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100491 ha_alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
492 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200493 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100494 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200495 be->id);
496 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100497 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200498 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200499 }
500 }
501
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400502#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200503 /* disabling tcp quick ack now allows the first request to leave the
504 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100505 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200506 */
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200507 if (flags & (CONNECT_DELACK_ALWAYS) ||
508 ((flags & CONNECT_DELACK_SMART_CONNECT ||
509 (flags & CONNECT_HAS_DATA) || conn->send_proxy_ofs) &&
510 (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900511 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200512#endif
513
Willy Tarreau163d4622015-10-13 16:16:41 +0200514#ifdef TCP_USER_TIMEOUT
515 /* there is not much more we can do here when it fails, it's still minor */
516 if (srv && srv->tcp_ut)
517 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &srv->tcp_ut, sizeof(srv->tcp_ut));
518#endif
Willy Tarreau034c88c2017-01-23 23:36:45 +0100519
520 if (use_fastopen) {
521#if defined(TCP_FASTOPEN_CONNECT)
522 setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN_CONNECT, &one, sizeof(one));
523#endif
524 }
Willy Tarreaue803de22010-01-21 17:43:04 +0100525 if (global.tune.server_sndbuf)
526 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
527
528 if (global.tune.server_rcvbuf)
529 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
530
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200531 addr = (conn->flags & CO_FL_SOCKS4) ? &srv->socks4_addr : conn->dst;
Alexander Liu2a54bb72019-05-22 19:44:48 +0800532 if (connect(fd, (const struct sockaddr *)addr, get_addr_len(addr)) == -1) {
Willy Tarreau819efbf2017-01-25 14:12:22 +0100533 if (errno == EINPROGRESS || errno == EALREADY) {
534 /* common case, let's wait for connect status */
535 conn->flags |= CO_FL_WAIT_L4_CONN;
536 }
537 else if (errno == EISCONN) {
538 /* should normally not happen but if so, indicates that it's OK */
539 conn->flags &= ~CO_FL_WAIT_L4_CONN;
540 }
541 else if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200542 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100543 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200544 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100545 conn->err_code = CO_ER_FREE_PORTS;
546 }
547 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200548 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100549 conn->err_code = CO_ER_ADDR_INUSE;
550 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200551
Willy Tarreaub1719512012-12-08 23:03:28 +0100552 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200553 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
554 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200555 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100556 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100557 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200558 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200559 } else if (errno == ETIMEDOUT) {
560 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200561 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
562 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200563 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100564 conn->err_code = CO_ER_SOCK_ERR;
565 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200566 return SF_ERR_SRVTO;
Willy Tarreau9650f372009-08-16 14:02:45 +0200567 } else {
568 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
569 //qfprintf(stderr,"Connect(): %d", errno);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200570 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
571 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200572 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100573 conn->err_code = CO_ER_SOCK_ERR;
574 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200575 return SF_ERR_SRVCL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200576 }
577 }
Willy Tarreau819efbf2017-01-25 14:12:22 +0100578 else {
579 /* connect() == 0, this is great! */
580 conn->flags &= ~CO_FL_WAIT_L4_CONN;
581 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200582
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100583 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200584
Willy Tarreauf79c8172013-10-21 16:30:56 +0200585 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100586 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200587
Willy Tarreau4c69cff2020-03-04 16:38:00 +0100588 if (conn->flags & CO_FL_WAIT_L4_CONN) {
589 fd_want_send(fd);
590 fd_cant_send(fd);
Willy Tarreau8dbd1a22020-07-31 08:59:09 +0200591 fd_cant_recv(fd);
Willy Tarreau4c69cff2020-03-04 16:38:00 +0100592 }
Willy Tarreauccf3f6d2019-09-05 17:05:05 +0200593
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200594 if (conn_xprt_init(conn) < 0) {
Willy Tarreau3f2770b2017-10-05 18:01:29 +0200595 conn_full_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100596 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200597 return SF_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200598 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200599
Willy Tarreaue7dff022015-04-03 01:14:29 +0200600 return SF_ERR_NONE; /* connection is OK */
Willy Tarreau9650f372009-08-16 14:02:45 +0200601}
602
603
Willy Tarreau59b94792012-05-11 16:16:40 +0200604/*
605 * Retrieves the source address for the socket <fd>, with <dir> indicating
606 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
607 * success, -1 in case of error. The socket's source address is stored in
608 * <sa> for <salen> bytes.
609 */
610int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
611{
612 if (dir)
613 return getsockname(fd, sa, &salen);
614 else
615 return getpeername(fd, sa, &salen);
616}
617
618
619/*
620 * Retrieves the original destination address for the socket <fd>, with <dir>
621 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
622 * listener, if the original destination address was translated, the original
623 * address is retrieved. It returns 0 in case of success, -1 in case of error.
624 * The socket's source address is stored in <sa> for <salen> bytes.
625 */
626int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
627{
628 if (dir)
629 return getpeername(fd, sa, &salen);
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100630 else {
631 int ret = getsockname(fd, sa, &salen);
632
633 if (ret < 0)
634 return ret;
635
Willy Tarreaue5733232019-05-22 19:24:06 +0200636#if defined(USE_TPROXY) && defined(SO_ORIGINAL_DST)
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100637 /* For TPROXY and Netfilter's NAT, we can retrieve the original
638 * IPv4 address before DNAT/REDIRECT. We must not do that with
639 * other families because v6-mapped IPv4 addresses are still
640 * reported as v4.
641 */
642 if (((struct sockaddr_storage *)sa)->ss_family == AF_INET
643 && getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
644 return 0;
Willy Tarreau59b94792012-05-11 16:16:40 +0200645#endif
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100646 return ret;
647 }
Willy Tarreau59b94792012-05-11 16:16:40 +0200648}
649
Olivier Houchard153659f2017-04-05 22:39:56 +0200650/* XXX: Should probably be elsewhere */
651static int compare_sockaddr(struct sockaddr_storage *a, struct sockaddr_storage *b)
652{
653 if (a->ss_family != b->ss_family) {
654 return (-1);
655 }
656 switch (a->ss_family) {
657 case AF_INET:
658 {
659 struct sockaddr_in *a4 = (void *)a, *b4 = (void *)b;
660 if (a4->sin_port != b4->sin_port)
661 return (-1);
662 return (memcmp(&a4->sin_addr, &b4->sin_addr,
663 sizeof(a4->sin_addr)));
664 }
665 case AF_INET6:
666 {
667 struct sockaddr_in6 *a6 = (void *)a, *b6 = (void *)b;
668 if (a6->sin6_port != b6->sin6_port)
669 return (-1);
670 return (memcmp(&a6->sin6_addr, &b6->sin6_addr,
671 sizeof(a6->sin6_addr)));
672 }
673 default:
674 return (-1);
675 }
676
677}
678
679#define LI_MANDATORY_FLAGS (LI_O_FOREIGN | LI_O_V6ONLY | LI_O_V4V6)
680/* When binding the listeners, check if a socket has been sent to us by the
681 * previous process that we could reuse, instead of creating a new one.
682 */
683static int tcp_find_compatible_fd(struct listener *l)
684{
685 struct xfer_sock_list *xfer_sock = xfer_sock_list;
686 int ret = -1;
687
688 while (xfer_sock) {
689 if (!compare_sockaddr(&xfer_sock->addr, &l->addr)) {
690 if ((l->interface == NULL && xfer_sock->iface == NULL) ||
691 (l->interface != NULL && xfer_sock->iface != NULL &&
692 !strcmp(l->interface, xfer_sock->iface))) {
693 if ((l->options & LI_MANDATORY_FLAGS) ==
694 (xfer_sock->options & LI_MANDATORY_FLAGS)) {
695 if ((xfer_sock->namespace == NULL &&
696 l->netns == NULL)
Willy Tarreaue5733232019-05-22 19:24:06 +0200697#ifdef USE_NS
Olivier Houchard153659f2017-04-05 22:39:56 +0200698 || (xfer_sock->namespace != NULL &&
699 l->netns != NULL &&
700 !strcmp(xfer_sock->namespace,
701 l->netns->node.key))
702#endif
703 ) {
704 break;
705 }
706
707 }
708 }
709 }
710 xfer_sock = xfer_sock->next;
711 }
712 if (xfer_sock != NULL) {
713 ret = xfer_sock->fd;
714 if (xfer_sock == xfer_sock_list)
715 xfer_sock_list = xfer_sock->next;
716 if (xfer_sock->prev)
717 xfer_sock->prev->next = xfer_sock->next;
718 if (xfer_sock->next)
719 xfer_sock->next->prev = xfer_sock->prev;
720 free(xfer_sock->iface);
721 free(xfer_sock->namespace);
722 free(xfer_sock);
723 }
724 return ret;
725}
726#undef L1_MANDATORY_FLAGS
Willy Tarreau59b94792012-05-11 16:16:40 +0200727
Willy Tarreaue6b98942007-10-29 01:09:36 +0100728/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100729 * an error message in <errmsg> if the message is at most <errlen> bytes long
730 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
731 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100732 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
733 * was alright and that no message was returned. ERR_RETRYABLE means that an
734 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700735 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100736 * the meaning of the error, but just indicate that a message is present which
737 * should be displayed with the respective level. Last, ERR_ABORT indicates
738 * that it's pointless to try to start other listeners. No error message is
739 * returned if errlen is NULL.
740 */
741int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
742{
743 __label__ tcp_return, tcp_close_return;
744 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100745 int ext, ready;
746 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100747 const char *msg = NULL;
Olivier Houchard153659f2017-04-05 22:39:56 +0200748#ifdef TCP_MAXSEG
749
750 /* Create a temporary TCP socket to get default parameters we can't
751 * guess.
752 * */
753 ready_len = sizeof(default_tcp_maxseg);
754 if (default_tcp_maxseg == -1) {
755 default_tcp_maxseg = -2;
756 fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
757 if (fd < 0)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100758 ha_warning("Failed to create a temporary socket!\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200759 else {
760 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp_maxseg,
761 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100762 ha_warning("Failed to get the default value of TCP_MAXSEG\n");
William Dauchyc0e23ae2020-02-12 10:09:14 +0100763 close(fd);
Olivier Houchard153659f2017-04-05 22:39:56 +0200764 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200765 }
766 if (default_tcp6_maxseg == -1) {
767 default_tcp6_maxseg = -2;
768 fd = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
769 if (fd >= 0) {
770 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp6_maxseg,
771 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100772 ha_warning("Failed ot get the default value of TCP_MAXSEG for IPv6\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200773 close(fd);
774 }
775 }
776#endif
777
Willy Tarreaue6b98942007-10-29 01:09:36 +0100778
779 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100780 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100781 *errmsg = 0;
782
783 if (listener->state != LI_ASSIGNED)
784 return ERR_NONE; /* already bound */
785
786 err = ERR_NONE;
787
Olivier Houchard153659f2017-04-05 22:39:56 +0200788 if (listener->fd == -1)
789 listener->fd = tcp_find_compatible_fd(listener);
790
Willy Tarreau40aa0702013-03-10 23:51:38 +0100791 /* if the listener already has an fd assigned, then we were offered the
792 * fd by an external process (most likely the parent), and we don't want
793 * to create a new socket. However we still want to set a few flags on
794 * the socket.
795 */
796 fd = listener->fd;
797 ext = (fd >= 0);
798
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100799 if (!ext) {
800 fd = my_socketat(listener->netns, listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
801
802 if (fd == -1) {
803 err |= ERR_RETRYABLE | ERR_ALERT;
804 msg = "cannot create listening socket";
805 goto tcp_return;
806 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100807 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100808
Willy Tarreaue6b98942007-10-29 01:09:36 +0100809 if (fd >= global.maxsock) {
810 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
811 msg = "not enough free sockets (raise '-n' parameter)";
812 goto tcp_close_return;
813 }
814
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200815 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100816 err |= ERR_FATAL | ERR_ALERT;
817 msg = "cannot make socket non-blocking";
818 goto tcp_close_return;
819 }
820
Willy Tarreau40aa0702013-03-10 23:51:38 +0100821 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100822 /* not fatal but should be reported */
823 msg = "cannot do so_reuseaddr";
824 err |= ERR_ALERT;
825 }
826
827 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900828 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Olivier Houchard153659f2017-04-05 22:39:56 +0200829 else {
830 struct linger tmplinger;
831 socklen_t len = sizeof(tmplinger);
832 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger, &len) == 0 &&
833 (tmplinger.l_onoff == 1 || tmplinger.l_linger == 0)) {
834 tmplinger.l_onoff = 0;
835 tmplinger.l_linger = 0;
836 setsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger,
837 sizeof(tmplinger));
838 }
839 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100840
Willy Tarreaue6b98942007-10-29 01:09:36 +0100841#ifdef SO_REUSEPORT
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000842 /* OpenBSD and Linux 3.9 support this. As it's present in old libc versions of
843 * Linux, it might return an error that we will silently ignore.
Willy Tarreaue6b98942007-10-29 01:09:36 +0100844 */
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000845 if (!ext && (global.tune.options & GTUNE_USE_REUSEPORT))
Willy Tarreau40aa0702013-03-10 23:51:38 +0100846 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100847#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200848
Willy Tarreau40aa0702013-03-10 23:51:38 +0100849 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200850 switch (listener->addr.ss_family) {
851 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200852 if (1
853#if defined(IP_TRANSPARENT)
854 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
855#endif
856#if defined(IP_FREEBIND)
857 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
858#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200859#if defined(IP_BINDANY)
860 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
861#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200862#if defined(SO_BINDANY)
863 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
864#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200865 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200866 msg = "cannot make listening socket transparent";
867 err |= ERR_ALERT;
868 }
869 break;
870 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200871 if (1
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200872#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200873 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
874#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100875#if defined(IP_FREEBIND)
876 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
877#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200878#if defined(IPV6_BINDANY)
879 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
880#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200881#if defined(SO_BINDANY)
882 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
883#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200884 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200885 msg = "cannot make listening socket transparent";
886 err |= ERR_ALERT;
887 }
888 break;
889 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100890 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200891
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100892#ifdef SO_BINDTODEVICE
893 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100894 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100895 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100896 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100897 msg = "cannot bind listener to device";
898 err |= ERR_WARN;
899 }
900 }
901#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400902#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100903 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400904 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200905 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
906 msg = "cannot set MSS";
907 err |= ERR_WARN;
908 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200909 } else if (ext) {
910 int tmpmaxseg = -1;
911 int defaultmss;
912 socklen_t len = sizeof(tmpmaxseg);
913
914 if (listener->addr.ss_family == AF_INET)
915 defaultmss = default_tcp_maxseg;
916 else
917 defaultmss = default_tcp6_maxseg;
918
919 getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &tmpmaxseg, &len);
William Dauchy97a7bda2020-02-12 15:53:04 +0100920 if (defaultmss > 0 &&
921 tmpmaxseg != defaultmss &&
922 setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &defaultmss, sizeof(defaultmss)) == -1) {
Olivier Houchard153659f2017-04-05 22:39:56 +0200923 msg = "cannot set MSS";
924 err |= ERR_WARN;
925 }
Willy Tarreaube1b9182009-06-14 18:48:19 +0200926 }
927#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +0100928#if defined(TCP_USER_TIMEOUT)
929 if (listener->tcp_ut) {
930 if (setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT,
931 &listener->tcp_ut, sizeof(listener->tcp_ut)) == -1) {
932 msg = "cannot set TCP User Timeout";
933 err |= ERR_WARN;
934 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200935 } else
936 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &zero,
937 sizeof(zero));
Willy Tarreau2af207a2015-02-04 00:45:58 +0100938#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200939#if defined(TCP_DEFER_ACCEPT)
940 if (listener->options & LI_O_DEF_ACCEPT) {
941 /* defer accept by up to one second */
942 int accept_delay = 1;
943 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
944 msg = "cannot enable DEFER_ACCEPT";
945 err |= ERR_WARN;
946 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200947 } else
948 setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &zero,
949 sizeof(zero));
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200950#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +0200951#if defined(TCP_FASTOPEN)
952 if (listener->options & LI_O_TCP_FO) {
953 /* TFO needs a queue length, let's use the configured backlog */
Willy Tarreaue2711c72019-02-27 15:39:41 +0100954 int qlen = listener_backlog(listener);
Willy Tarreau1c862c52012-10-05 16:21:00 +0200955 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
956 msg = "cannot enable TCP_FASTOPEN";
957 err |= ERR_WARN;
958 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200959 } else {
960 socklen_t len;
961 int qlen;
962 len = sizeof(qlen);
963 /* Only disable fast open if it was enabled, we don't want
964 * the kernel to create a fast open queue if there's none.
965 */
966 if (getsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, &len) == 0 &&
967 qlen != 0) {
968 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &zero,
969 sizeof(zero)) == -1) {
970 msg = "cannot disable TCP_FASTOPEN";
971 err |= ERR_WARN;
972 }
973 }
Willy Tarreau1c862c52012-10-05 16:21:00 +0200974 }
975#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100976#if defined(IPV6_V6ONLY)
977 if (listener->options & LI_O_V6ONLY)
978 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +0100979 else if (listener->options & LI_O_V4V6)
980 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100981#endif
982
Willy Tarreau40aa0702013-03-10 23:51:38 +0100983 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100984 err |= ERR_RETRYABLE | ERR_ALERT;
985 msg = "cannot bind socket";
986 goto tcp_close_return;
987 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100988
Willy Tarreau40aa0702013-03-10 23:51:38 +0100989 ready = 0;
990 ready_len = sizeof(ready);
991 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
992 ready = 0;
993
994 if (!(ext && ready) && /* only listen if not already done by external process */
Willy Tarreaue2711c72019-02-27 15:39:41 +0100995 listen(fd, listener_backlog(listener)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100996 err |= ERR_RETRYABLE | ERR_ALERT;
997 msg = "cannot listen to socket";
998 goto tcp_close_return;
999 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001000
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +04001001#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001002 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +09001003 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Olivier Houchard153659f2017-04-05 22:39:56 +02001004 else
1005 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001006#endif
1007
Willy Tarreaue6b98942007-10-29 01:09:36 +01001008 /* the socket is ready */
1009 listener->fd = fd;
1010 listener->state = LI_LISTEN;
1011
Willy Tarreaua9786b62018-01-25 07:22:13 +01001012 fd_insert(fd, listener, listener->proto->accept,
Willy Tarreau0948a782020-02-12 10:15:34 +01001013 thread_mask(listener->bind_conf->bind_thread) & all_threads_mask);
Willy Tarreaueb472682010-05-28 18:46:57 +02001014
Willy Tarreaue6b98942007-10-29 01:09:36 +01001015 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001016 if (msg && errlen) {
1017 char pn[INET6_ADDRSTRLEN];
1018
Willy Tarreau631f01c2011-09-05 00:36:48 +02001019 addr_to_str(&listener->addr, pn, sizeof(pn));
1020 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001021 }
Willy Tarreaue6b98942007-10-29 01:09:36 +01001022 return err;
1023
1024 tcp_close_return:
1025 close(fd);
1026 goto tcp_return;
1027}
1028
1029/* This function creates all TCP sockets bound to the protocol entry <proto>.
1030 * It is intended to be used as the protocol's bind_all() function.
1031 * The sockets will be registered but not added to any fd_set, in order not to
1032 * loose them across the fork(). A call to enable_all_listeners() is needed
1033 * to complete initialization. The return value is composed from ERR_*.
Willy Tarreaudaacf362019-07-24 16:45:02 +02001034 *
1035 * Must be called with proto_lock held.
1036 *
Willy Tarreaue6b98942007-10-29 01:09:36 +01001037 */
Emeric Bruncf20bf12010-10-22 16:06:11 +02001038static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001039{
1040 struct listener *listener;
1041 int err = ERR_NONE;
1042
1043 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +02001044 err |= tcp_bind_listener(listener, errmsg, errlen);
1045 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001046 break;
1047 }
1048
1049 return err;
1050}
1051
Willy Tarreau32282382017-09-15 07:44:44 +02001052/* Add <listener> to the list of tcpv4 listeners, on port <port>. The
1053 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1054 * The number of listeners for the protocol is updated.
Willy Tarreaudaacf362019-07-24 16:45:02 +02001055 *
1056 * Must be called with proto_lock held.
1057 *
Willy Tarreaue6b98942007-10-29 01:09:36 +01001058 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001059static void tcpv4_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001060{
1061 if (listener->state != LI_INIT)
1062 return;
1063 listener->state = LI_ASSIGNED;
1064 listener->proto = &proto_tcpv4;
Willy Tarreau32282382017-09-15 07:44:44 +02001065 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001066 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
1067 proto_tcpv4.nb_listeners++;
1068}
1069
Willy Tarreau32282382017-09-15 07:44:44 +02001070/* Add <listener> to the list of tcpv6 listeners, on port <port>. The
1071 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1072 * The number of listeners for the protocol is updated.
Willy Tarreaudaacf362019-07-24 16:45:02 +02001073 *
1074 * Must be called with proto_lock held.
1075 *
Willy Tarreaue6b98942007-10-29 01:09:36 +01001076 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001077static void tcpv6_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001078{
1079 if (listener->state != LI_INIT)
1080 return;
1081 listener->state = LI_ASSIGNED;
1082 listener->proto = &proto_tcpv6;
Willy Tarreau32282382017-09-15 07:44:44 +02001083 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001084 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
1085 proto_tcpv6.nb_listeners++;
1086}
1087
Willy Tarreau092d8652014-07-07 20:22:12 +02001088/* Pause a listener. Returns < 0 in case of failure, 0 if the listener
1089 * was totally stopped, or > 0 if correctly paused.
1090 */
1091int tcp_pause_listener(struct listener *l)
1092{
1093 if (shutdown(l->fd, SHUT_WR) != 0)
1094 return -1; /* Solaris dies here */
1095
Willy Tarreaue2711c72019-02-27 15:39:41 +01001096 if (listen(l->fd, listener_backlog(l)) != 0)
Willy Tarreau092d8652014-07-07 20:22:12 +02001097 return -1; /* OpenBSD dies here */
1098
1099 if (shutdown(l->fd, SHUT_RD) != 0)
1100 return -1; /* should always be OK */
1101 return 1;
1102}
1103
William Lallemand2e785f22016-05-25 01:48:42 +02001104/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001105 * Execute the "set-src" action. May be called from {tcp,http}request.
1106 * It only changes the address and tries to preserve the original port. If the
1107 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand2e785f22016-05-25 01:48:42 +02001108 */
1109enum act_return tcp_action_req_set_src(struct act_rule *rule, struct proxy *px,
1110 struct session *sess, struct stream *s, int flags)
1111{
1112 struct connection *cli_conn;
1113
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001114 if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
William Lallemand2e785f22016-05-25 01:48:42 +02001115 struct sample *smp;
1116
1117 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1118 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001119 int port = get_net_port(cli_conn->src);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001120
William Lallemand2e785f22016-05-25 01:48:42 +02001121 if (smp->data.type == SMP_T_IPV4) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001122 ((struct sockaddr_in *)cli_conn->src)->sin_family = AF_INET;
1123 ((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
1124 ((struct sockaddr_in *)cli_conn->src)->sin_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001125 } else if (smp->data.type == SMP_T_IPV6) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001126 ((struct sockaddr_in6 *)cli_conn->src)->sin6_family = AF_INET6;
1127 memcpy(&((struct sockaddr_in6 *)cli_conn->src)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
1128 ((struct sockaddr_in6 *)cli_conn->src)->sin6_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001129 }
1130 }
William Lallemand01252ed2016-05-25 02:33:16 +02001131 cli_conn->flags |= CO_FL_ADDR_FROM_SET;
William Lallemand2e785f22016-05-25 01:48:42 +02001132 }
1133 return ACT_RET_CONT;
1134}
1135
William Lallemand44be6402016-05-25 01:51:35 +02001136/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001137 * Execute the "set-dst" action. May be called from {tcp,http}request.
1138 * It only changes the address and tries to preserve the original port. If the
1139 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001140 */
1141enum act_return tcp_action_req_set_dst(struct act_rule *rule, struct proxy *px,
1142 struct session *sess, struct stream *s, int flags)
1143{
1144 struct connection *cli_conn;
1145
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001146 if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
William Lallemand13e9b0c2016-05-25 02:34:07 +02001147 struct sample *smp;
1148
1149 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1150 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001151 int port = get_net_port(cli_conn->dst);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001152
William Lallemand13e9b0c2016-05-25 02:34:07 +02001153 if (smp->data.type == SMP_T_IPV4) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001154 ((struct sockaddr_in *)cli_conn->dst)->sin_family = AF_INET;
1155 ((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001156 } else if (smp->data.type == SMP_T_IPV6) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001157 ((struct sockaddr_in6 *)cli_conn->dst)->sin6_family = AF_INET6;
1158 memcpy(&((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
1159 ((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001160 }
1161 cli_conn->flags |= CO_FL_ADDR_TO_SET;
1162 }
1163 }
1164 return ACT_RET_CONT;
1165}
1166
1167/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001168 * Execute the "set-src-port" action. May be called from {tcp,http}request.
1169 * We must test the sin_family before setting the port. If the address family
1170 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1171 * and the port is assigned.
William Lallemand44be6402016-05-25 01:51:35 +02001172 */
1173enum act_return tcp_action_req_set_src_port(struct act_rule *rule, struct proxy *px,
1174 struct session *sess, struct stream *s, int flags)
1175{
1176 struct connection *cli_conn;
1177
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001178 if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
William Lallemand44be6402016-05-25 01:51:35 +02001179 struct sample *smp;
1180
William Lallemand44be6402016-05-25 01:51:35 +02001181 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1182 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001183 if (cli_conn->src->ss_family == AF_INET6) {
1184 ((struct sockaddr_in6 *)cli_conn->src)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001185 } else {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001186 if (cli_conn->src->ss_family != AF_INET) {
1187 cli_conn->src->ss_family = AF_INET;
1188 ((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = 0;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001189 }
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001190 ((struct sockaddr_in *)cli_conn->src)->sin_port = htons(smp->data.u.sint);
William Lallemand44be6402016-05-25 01:51:35 +02001191 }
1192 }
1193 }
1194 return ACT_RET_CONT;
1195}
1196
William Lallemand13e9b0c2016-05-25 02:34:07 +02001197/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001198 * Execute the "set-dst-port" action. May be called from {tcp,http}request.
1199 * We must test the sin_family before setting the port. If the address family
1200 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1201 * and the port is assigned.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001202 */
1203enum act_return tcp_action_req_set_dst_port(struct act_rule *rule, struct proxy *px,
1204 struct session *sess, struct stream *s, int flags)
1205{
1206 struct connection *cli_conn;
1207
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001208 if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
William Lallemand13e9b0c2016-05-25 02:34:07 +02001209 struct sample *smp;
1210
William Lallemand13e9b0c2016-05-25 02:34:07 +02001211 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1212 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001213 if (cli_conn->dst->ss_family == AF_INET6) {
1214 ((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001215 } else {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001216 if (cli_conn->dst->ss_family != AF_INET) {
1217 cli_conn->dst->ss_family = AF_INET;
1218 ((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = 0;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001219 }
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001220 ((struct sockaddr_in *)cli_conn->dst)->sin_port = htons(smp->data.u.sint);
William Lallemand13e9b0c2016-05-25 02:34:07 +02001221 }
1222 }
1223 }
1224 return ACT_RET_CONT;
1225}
1226
Willy Tarreau2d392c22015-08-24 01:43:45 +02001227/* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
1228static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct proxy *px, struct session *sess, struct stream *strm, int flags)
1229{
1230 struct connection *conn = objt_conn(sess->origin);
1231
1232 if (!conn)
1233 goto out;
1234
1235 if (!conn_ctrl_ready(conn))
1236 goto out;
1237
Willy Tarreau2d392c22015-08-24 01:43:45 +02001238#ifdef TCP_QUICKACK
Willy Tarreaufc2a2d92015-09-29 18:15:01 +02001239 /* drain is needed only to send the quick ACK */
1240 conn_sock_drain(conn);
1241
Willy Tarreau2d392c22015-08-24 01:43:45 +02001242 /* re-enable quickack if it was disabled to ack all data and avoid
1243 * retransmits from the client that might trigger a real reset.
1244 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001245 setsockopt(conn->handle.fd, SOL_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001246#endif
1247 /* lingering must absolutely be disabled so that we don't send a
1248 * shutdown(), this is critical to the TCP_REPAIR trick. When no stream
1249 * is present, returning with ERR will cause lingering to be disabled.
1250 */
1251 if (strm)
1252 strm->si[0].flags |= SI_FL_NOLINGER;
1253
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001254 /* We're on the client-facing side, we must force to disable lingering to
1255 * ensure we will use an RST exclusively and kill any pending data.
1256 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001257 fdtab[conn->handle.fd].linger_risk = 1;
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001258
Willy Tarreau2d392c22015-08-24 01:43:45 +02001259#ifdef TCP_REPAIR
Willy Tarreau585744b2017-08-24 14:31:19 +02001260 if (setsockopt(conn->handle.fd, SOL_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
Willy Tarreau2d392c22015-08-24 01:43:45 +02001261 /* socket will be quiet now */
1262 goto out;
1263 }
1264#endif
1265 /* either TCP_REPAIR is not defined or it failed (eg: permissions).
1266 * Let's fall back on the TTL trick, though it only works for routed
1267 * network and has no effect on local net.
1268 */
1269#ifdef IP_TTL
Willy Tarreau585744b2017-08-24 14:31:19 +02001270 setsockopt(conn->handle.fd, SOL_IP, IP_TTL, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001271#endif
1272 out:
1273 /* kill the stream if any */
1274 if (strm) {
1275 channel_abort(&strm->req);
1276 channel_abort(&strm->res);
Christopher Faulet177f4802020-03-06 15:10:46 +01001277 strm->req.analysers &= AN_REQ_FLT_END;
1278 strm->res.analysers &= AN_RES_FLT_END;
Christopher Fauletddc005a2020-03-06 15:23:18 +01001279 if (strm->flags & SF_BE_ASSIGNED)
1280 _HA_ATOMIC_ADD(&strm->be->be_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001281 if (!(strm->flags & SF_ERR_MASK))
1282 strm->flags |= SF_ERR_PRXCOND;
1283 if (!(strm->flags & SF_FINST_MASK))
1284 strm->flags |= SF_FINST_R;
1285 }
1286
Olivier Houchard40514102019-03-08 18:54:04 +01001287 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001288 if (sess->listener->counters)
Olivier Houchard40514102019-03-08 18:54:04 +01001289 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001290
Christopher Fauletf573ba22020-03-06 15:15:49 +01001291 return ACT_RET_ABRT;
Willy Tarreau2d392c22015-08-24 01:43:45 +02001292}
1293
William Lallemand13e9b0c2016-05-25 02:34:07 +02001294/* parse "set-{src,dst}[-port]" action */
1295enum act_parse_ret tcp_parse_set_src_dst(const char **args, int *orig_arg, struct proxy *px, struct act_rule *rule, char **err)
William Lallemand2e785f22016-05-25 01:48:42 +02001296{
1297 int cur_arg;
1298 struct sample_expr *expr;
1299 unsigned int where;
1300
1301 cur_arg = *orig_arg;
Willy Tarreaue3b57bf2020-02-14 16:50:14 +01001302 expr = sample_parse_expr((char **)args, &cur_arg, px->conf.args.file, px->conf.args.line, err, &px->conf.args, NULL);
William Lallemand2e785f22016-05-25 01:48:42 +02001303 if (!expr)
1304 return ACT_RET_PRS_ERR;
1305
1306 where = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001307 if (px->cap & PR_CAP_FE)
William Lallemand2e785f22016-05-25 01:48:42 +02001308 where |= SMP_VAL_FE_HRQ_HDR;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001309 if (px->cap & PR_CAP_BE)
William Lallemand2e785f22016-05-25 01:48:42 +02001310 where |= SMP_VAL_BE_HRQ_HDR;
1311
1312 if (!(expr->fetch->val & where)) {
1313 memprintf(err,
1314 "fetch method '%s' extracts information from '%s', none of which is available here",
1315 args[cur_arg-1], sample_src_names(expr->fetch->use));
1316 free(expr);
1317 return ACT_RET_PRS_ERR;
1318 }
1319 rule->arg.expr = expr;
1320 rule->action = ACT_CUSTOM;
1321
1322 if (!strcmp(args[*orig_arg-1], "set-src")) {
1323 rule->action_ptr = tcp_action_req_set_src;
William Lallemand44be6402016-05-25 01:51:35 +02001324 } else if (!strcmp(args[*orig_arg-1], "set-src-port")) {
1325 rule->action_ptr = tcp_action_req_set_src_port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001326 } else if (!strcmp(args[*orig_arg-1], "set-dst")) {
1327 rule->action_ptr = tcp_action_req_set_dst;
1328 } else if (!strcmp(args[*orig_arg-1], "set-dst-port")) {
1329 rule->action_ptr = tcp_action_req_set_dst_port;
William Lallemand2e785f22016-05-25 01:48:42 +02001330 } else {
1331 return ACT_RET_PRS_ERR;
1332 }
1333
1334 (*orig_arg)++;
1335
1336 return ACT_RET_PRS_OK;
1337}
1338
1339
Willy Tarreau2d392c22015-08-24 01:43:45 +02001340/* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
1341 * success, ACT_RET_PRS_ERR on error.
1342 */
1343static enum act_parse_ret tcp_parse_silent_drop(const char **args, int *orig_arg, struct proxy *px,
1344 struct act_rule *rule, char **err)
1345{
1346 rule->action = ACT_CUSTOM;
1347 rule->action_ptr = tcp_exec_action_silent_drop;
1348 return ACT_RET_PRS_OK;
1349}
1350
Willy Tarreau645513a2010-05-24 20:55:15 +02001351
1352/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001353/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02001354/************************************************************************/
1355
Willy Tarreau4a129812012-04-25 17:31:42 +02001356/* fetch the connection's source IPv4/IPv6 address */
Thierry FOURNIERa123ad82015-07-24 09:12:15 +02001357int smp_fetch_src(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001358{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001359 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001360
1361 if (!cli_conn)
1362 return 0;
1363
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001364 if (!conn_get_src(cli_conn))
1365 return 0;
1366
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001367 switch (cli_conn->src->ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001368 case AF_INET:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001369 smp->data.u.ipv4 = ((struct sockaddr_in *)cli_conn->src)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001370 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001371 break;
1372 case AF_INET6:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001373 smp->data.u.ipv6 = ((struct sockaddr_in6 *)cli_conn->src)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001374 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001375 break;
1376 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001377 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001378 }
Emeric Brunf769f512010-10-22 17:14:01 +02001379
Willy Tarreau37406352012-04-23 16:16:37 +02001380 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001381 return 1;
1382}
1383
Willy Tarreaua5e37562011-12-16 17:06:15 +01001384/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001385static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001386smp_fetch_sport(const struct arg *args, struct sample *smp, const char *k, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001387{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001388 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001389
1390 if (!cli_conn)
1391 return 0;
1392
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001393 if (!conn_get_src(cli_conn))
1394 return 0;
1395
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001396 smp->data.type = SMP_T_SINT;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001397 if (!(smp->data.u.sint = get_host_port(cli_conn->src)))
Emeric Brunf769f512010-10-22 17:14:01 +02001398 return 0;
1399
Willy Tarreau37406352012-04-23 16:16:37 +02001400 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001401 return 1;
1402}
1403
Willy Tarreau4a129812012-04-25 17:31:42 +02001404/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001405static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001406smp_fetch_dst(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001407{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001408 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreau645513a2010-05-24 20:55:15 +02001409
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001410 if (!cli_conn)
1411 return 0;
1412
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001413 if (!conn_get_dst(cli_conn))
1414 return 0;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001415
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001416 switch (cli_conn->dst->ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001417 case AF_INET:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001418 smp->data.u.ipv4 = ((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001419 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001420 break;
1421 case AF_INET6:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001422 smp->data.u.ipv6 = ((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001423 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001424 break;
1425 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001426 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001427 }
Emeric Brunf769f512010-10-22 17:14:01 +02001428
Willy Tarreau37406352012-04-23 16:16:37 +02001429 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001430 return 1;
1431}
1432
Willy Tarreau16e01562016-08-09 16:46:18 +02001433/* check if the destination address of the front connection is local to the
1434 * system or if it was intercepted.
1435 */
1436int smp_fetch_dst_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1437{
1438 struct connection *conn = objt_conn(smp->sess->origin);
1439 struct listener *li = smp->sess->listener;
1440
1441 if (!conn)
1442 return 0;
1443
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001444 if (!conn_get_dst(conn))
Willy Tarreau16e01562016-08-09 16:46:18 +02001445 return 0;
1446
1447 smp->data.type = SMP_T_BOOL;
1448 smp->flags = 0;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001449 smp->data.u.sint = addr_is_local(li->netns, conn->dst);
Willy Tarreau16e01562016-08-09 16:46:18 +02001450 return smp->data.u.sint >= 0;
1451}
1452
1453/* check if the source address of the front connection is local to the system
1454 * or not.
1455 */
1456int smp_fetch_src_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1457{
1458 struct connection *conn = objt_conn(smp->sess->origin);
1459 struct listener *li = smp->sess->listener;
1460
1461 if (!conn)
1462 return 0;
1463
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001464 if (!conn_get_src(conn))
Willy Tarreau16e01562016-08-09 16:46:18 +02001465 return 0;
1466
1467 smp->data.type = SMP_T_BOOL;
1468 smp->flags = 0;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001469 smp->data.u.sint = addr_is_local(li->netns, conn->src);
Willy Tarreau16e01562016-08-09 16:46:18 +02001470 return smp->data.u.sint >= 0;
1471}
1472
Willy Tarreaua5e37562011-12-16 17:06:15 +01001473/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001474static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001475smp_fetch_dport(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001476{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001477 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001478
1479 if (!cli_conn)
1480 return 0;
1481
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001482 if (!conn_get_dst(cli_conn))
1483 return 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001484
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001485 smp->data.type = SMP_T_SINT;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001486 if (!(smp->data.u.sint = get_host_port(cli_conn->dst)))
Emeric Brunf769f512010-10-22 17:14:01 +02001487 return 0;
1488
Willy Tarreau37406352012-04-23 16:16:37 +02001489 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001490 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01001491}
1492
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001493#ifdef TCP_INFO
1494
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001495
1496/* Validates the arguments passed to "fc_*" fetch keywords returning a time
1497 * value. These keywords support an optional string representing the unit of the
1498 * result: "us" for microseconds and "ms" for milliseconds". Returns 0 on error
1499 * and non-zero if OK.
1500 */
1501static int val_fc_time_value(struct arg *args, char **err)
1502{
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001503 if (args[0].type == ARGT_STR) {
1504 if (strcmp(args[0].data.str.area, "us") == 0) {
Christopher Faulet6ad7df42020-08-07 11:45:18 +02001505 chunk_destroy(&args[0].data.str);
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001506 args[0].type = ARGT_SINT;
1507 args[0].data.sint = TIME_UNIT_US;
1508 }
1509 else if (strcmp(args[0].data.str.area, "ms") == 0) {
Christopher Faulet6ad7df42020-08-07 11:45:18 +02001510 chunk_destroy(&args[0].data.str);
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001511 args[0].type = ARGT_SINT;
1512 args[0].data.sint = TIME_UNIT_MS;
1513 }
1514 else {
1515 memprintf(err, "expects 'us' or 'ms', got '%s'",
1516 args[0].data.str.area);
1517 return 0;
1518 }
1519 }
1520 else {
1521 memprintf(err, "Unexpected arg type");
1522 return 0;
1523 }
1524
1525 return 1;
1526}
1527
1528/* Validates the arguments passed to "fc_*" fetch keywords returning a
1529 * counter. These keywords should be used without any keyword, but because of a
1530 * bug in previous versions, an optional string argument may be passed. In such
1531 * case, the argument is ignored and a warning is emitted. Returns 0 on error
1532 * and non-zero if OK.
1533 */
1534static int var_fc_counter(struct arg *args, char **err)
1535{
1536 if (args[0].type != ARGT_STOP) {
1537 ha_warning("no argument supported for 'fc_*' sample expressions returning counters.\n");
1538 if (args[0].type == ARGT_STR)
Christopher Faulet6ad7df42020-08-07 11:45:18 +02001539 chunk_destroy(&args[0].data.str);
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001540 args[0].type = ARGT_STOP;
1541 }
1542
1543 return 1;
1544}
1545
Joseph Herlanta6331472018-11-25 12:59:12 -08001546/* Returns some tcp_info data if it's available. "dir" must be set to 0 if
1547 * the client connection is required, otherwise it is set to 1. "val" represents
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001548 * the required value.
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001549 * If the function fails it returns 0, otherwise it returns 1 and "result" is filled.
1550 */
1551static inline int get_tcp_info(const struct arg *args, struct sample *smp,
1552 int dir, int val)
1553{
1554 struct connection *conn;
1555 struct tcp_info info;
1556 socklen_t optlen;
1557
1558 /* strm can be null. */
1559 if (!smp->strm)
1560 return 0;
1561
1562 /* get the object associated with the stream interface.The
1563 * object can be other thing than a connection. For example,
1564 * it be a appctx. */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001565 conn = cs_conn(objt_cs(smp->strm->si[dir].end));
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001566 if (!conn)
1567 return 0;
1568
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001569 /* The fd may not be available for the tcp_info struct, and the
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001570 syscal can fail. */
1571 optlen = sizeof(info);
Willy Tarreau585744b2017-08-24 14:31:19 +02001572 if (getsockopt(conn->handle.fd, SOL_TCP, TCP_INFO, &info, &optlen) == -1)
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001573 return 0;
1574
1575 /* extract the value. */
1576 smp->data.type = SMP_T_SINT;
1577 switch (val) {
Joe Williams30fcd392016-08-10 07:06:44 -07001578 case 0: smp->data.u.sint = info.tcpi_rtt; break;
1579 case 1: smp->data.u.sint = info.tcpi_rttvar; break;
1580#if defined(__linux__)
1581 /* these ones are common to all Linux versions */
1582 case 2: smp->data.u.sint = info.tcpi_unacked; break;
1583 case 3: smp->data.u.sint = info.tcpi_sacked; break;
1584 case 4: smp->data.u.sint = info.tcpi_lost; break;
1585 case 5: smp->data.u.sint = info.tcpi_retrans; break;
1586 case 6: smp->data.u.sint = info.tcpi_fackets; break;
1587 case 7: smp->data.u.sint = info.tcpi_reordering; break;
1588#elif defined(__FreeBSD__) || defined(__NetBSD__)
1589 /* the ones are found on FreeBSD and NetBSD featuring TCP_INFO */
1590 case 2: smp->data.u.sint = info.__tcpi_unacked; break;
1591 case 3: smp->data.u.sint = info.__tcpi_sacked; break;
1592 case 4: smp->data.u.sint = info.__tcpi_lost; break;
1593 case 5: smp->data.u.sint = info.__tcpi_retrans; break;
1594 case 6: smp->data.u.sint = info.__tcpi_fackets; break;
1595 case 7: smp->data.u.sint = info.__tcpi_reordering; break;
1596#endif
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001597 default: return 0;
1598 }
1599
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001600 return 1;
1601}
1602
Ilya Shipitsin47d17182020-06-21 21:42:57 +05001603/* get the mean rtt of a client connection */
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001604static int
1605smp_fetch_fc_rtt(const struct arg *args, struct sample *smp, const char *kw, void *private)
1606{
1607 if (!get_tcp_info(args, smp, 0, 0))
1608 return 0;
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001609
1610 /* By default or if explicitly specified, convert rtt to ms */
1611 if (!args || args[0].type == ARGT_STOP || args[0].data.sint == TIME_UNIT_MS)
1612 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1613
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001614 return 1;
1615}
1616
Ilya Shipitsin47d17182020-06-21 21:42:57 +05001617/* get the variance of the mean rtt of a client connection */
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001618static int
1619smp_fetch_fc_rttvar(const struct arg *args, struct sample *smp, const char *kw, void *private)
1620{
1621 if (!get_tcp_info(args, smp, 0, 1))
1622 return 0;
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001623
1624 /* By default or if explicitly specified, convert rttvar to ms */
1625 if (!args || args[0].type == ARGT_STOP || args[0].data.sint == TIME_UNIT_MS)
1626 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1627
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001628 return 1;
1629}
Joe Williams30fcd392016-08-10 07:06:44 -07001630
1631#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1632
Ilya Shipitsin47d17182020-06-21 21:42:57 +05001633/* get the unacked counter on a client connection */
Joe Williams30fcd392016-08-10 07:06:44 -07001634static int
1635smp_fetch_fc_unacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1636{
1637 if (!get_tcp_info(args, smp, 0, 2))
1638 return 0;
1639 return 1;
1640}
1641
Ilya Shipitsin47d17182020-06-21 21:42:57 +05001642/* get the sacked counter on a client connection */
Joe Williams30fcd392016-08-10 07:06:44 -07001643static int
1644smp_fetch_fc_sacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1645{
1646 if (!get_tcp_info(args, smp, 0, 3))
1647 return 0;
1648 return 1;
1649}
1650
Ilya Shipitsin47d17182020-06-21 21:42:57 +05001651/* get the lost counter on a client connection */
Joe Williams30fcd392016-08-10 07:06:44 -07001652static int
1653smp_fetch_fc_lost(const struct arg *args, struct sample *smp, const char *kw, void *private)
1654{
1655 if (!get_tcp_info(args, smp, 0, 4))
1656 return 0;
1657 return 1;
1658}
1659
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05001660/* get the retrans counter on a client connection */
Joe Williams30fcd392016-08-10 07:06:44 -07001661static int
1662smp_fetch_fc_retrans(const struct arg *args, struct sample *smp, const char *kw, void *private)
1663{
1664 if (!get_tcp_info(args, smp, 0, 5))
1665 return 0;
1666 return 1;
1667}
1668
Ilya Shipitsin47d17182020-06-21 21:42:57 +05001669/* get the fackets counter on a client connection */
Joe Williams30fcd392016-08-10 07:06:44 -07001670static int
1671smp_fetch_fc_fackets(const struct arg *args, struct sample *smp, const char *kw, void *private)
1672{
1673 if (!get_tcp_info(args, smp, 0, 6))
1674 return 0;
1675 return 1;
1676}
1677
Ilya Shipitsin47d17182020-06-21 21:42:57 +05001678/* get the reordering counter on a client connection */
Joe Williams30fcd392016-08-10 07:06:44 -07001679static int
1680smp_fetch_fc_reordering(const struct arg *args, struct sample *smp, const char *kw, void *private)
1681{
1682 if (!get_tcp_info(args, smp, 0, 7))
1683 return 0;
1684 return 1;
1685}
1686#endif // linux || freebsd || netbsd
1687#endif // TCP_INFO
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001688
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001689#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001690/* parse the "v4v6" bind keyword */
1691static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1692{
1693 struct listener *l;
1694
1695 list_for_each_entry(l, &conf->listeners, by_bind) {
1696 if (l->addr.ss_family == AF_INET6)
1697 l->options |= LI_O_V4V6;
1698 }
1699
1700 return 0;
1701}
1702
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001703/* parse the "v6only" bind keyword */
1704static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1705{
1706 struct listener *l;
1707
1708 list_for_each_entry(l, &conf->listeners, by_bind) {
1709 if (l->addr.ss_family == AF_INET6)
1710 l->options |= LI_O_V6ONLY;
1711 }
1712
1713 return 0;
1714}
1715#endif
1716
Pieter Baauwd551fb52013-05-08 22:49:23 +02001717#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001718/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001719static int bind_parse_transparent(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
Willy Tarreau44791242012-09-12 23:27:21 +02001720{
1721 struct listener *l;
1722
Willy Tarreau4348fad2012-09-20 16:48:07 +02001723 list_for_each_entry(l, &conf->listeners, by_bind) {
1724 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1725 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02001726 }
1727
Willy Tarreau44791242012-09-12 23:27:21 +02001728 return 0;
1729}
1730#endif
1731
1732#ifdef TCP_DEFER_ACCEPT
1733/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001734static int bind_parse_defer_accept(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
Willy Tarreau44791242012-09-12 23:27:21 +02001735{
1736 struct listener *l;
1737
Willy Tarreau4348fad2012-09-20 16:48:07 +02001738 list_for_each_entry(l, &conf->listeners, by_bind) {
1739 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1740 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02001741 }
1742
Willy Tarreau44791242012-09-12 23:27:21 +02001743 return 0;
1744}
1745#endif
1746
Willy Tarreau1c862c52012-10-05 16:21:00 +02001747#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01001748/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02001749static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1750{
1751 struct listener *l;
1752
1753 list_for_each_entry(l, &conf->listeners, by_bind) {
1754 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1755 l->options |= LI_O_TCP_FO;
1756 }
1757
1758 return 0;
1759}
1760#endif
1761
Willy Tarreau44791242012-09-12 23:27:21 +02001762#ifdef TCP_MAXSEG
1763/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001764static int bind_parse_mss(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
Willy Tarreau44791242012-09-12 23:27:21 +02001765{
1766 struct listener *l;
1767 int mss;
1768
Willy Tarreau44791242012-09-12 23:27:21 +02001769 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001770 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001771 return ERR_ALERT | ERR_FATAL;
1772 }
1773
1774 mss = atoi(args[cur_arg + 1]);
1775 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001776 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001777 return ERR_ALERT | ERR_FATAL;
1778 }
1779
Willy Tarreau4348fad2012-09-20 16:48:07 +02001780 list_for_each_entry(l, &conf->listeners, by_bind) {
1781 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1782 l->maxseg = mss;
1783 }
Willy Tarreau44791242012-09-12 23:27:21 +02001784
1785 return 0;
1786}
1787#endif
1788
Willy Tarreau2af207a2015-02-04 00:45:58 +01001789#ifdef TCP_USER_TIMEOUT
1790/* parse the "tcp-ut" bind keyword */
1791static int bind_parse_tcp_ut(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1792{
1793 const char *ptr = NULL;
1794 struct listener *l;
1795 unsigned int timeout;
1796
1797 if (!*args[cur_arg + 1]) {
1798 memprintf(err, "'%s' : missing TCP User Timeout value", args[cur_arg]);
1799 return ERR_ALERT | ERR_FATAL;
1800 }
1801
1802 ptr = parse_time_err(args[cur_arg + 1], &timeout, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +02001803 if (ptr == PARSE_TIME_OVER) {
1804 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
1805 args[cur_arg+1], args[cur_arg]);
1806 return ERR_ALERT | ERR_FATAL;
1807 }
1808 else if (ptr == PARSE_TIME_UNDER) {
1809 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
1810 args[cur_arg+1], args[cur_arg]);
1811 return ERR_ALERT | ERR_FATAL;
1812 }
1813 else if (ptr) {
Willy Tarreau2af207a2015-02-04 00:45:58 +01001814 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[cur_arg]);
1815 return ERR_ALERT | ERR_FATAL;
1816 }
1817
1818 list_for_each_entry(l, &conf->listeners, by_bind) {
1819 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1820 l->tcp_ut = timeout;
1821 }
1822
1823 return 0;
1824}
1825#endif
1826
Willy Tarreau44791242012-09-12 23:27:21 +02001827#ifdef SO_BINDTODEVICE
Willy Tarreau2af207a2015-02-04 00:45:58 +01001828/* parse the "interface" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001829static int bind_parse_interface(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
Willy Tarreau44791242012-09-12 23:27:21 +02001830{
1831 struct listener *l;
1832
Willy Tarreau44791242012-09-12 23:27:21 +02001833 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001834 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001835 return ERR_ALERT | ERR_FATAL;
1836 }
1837
Willy Tarreau4348fad2012-09-20 16:48:07 +02001838 list_for_each_entry(l, &conf->listeners, by_bind) {
1839 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1840 l->interface = strdup(args[cur_arg + 1]);
1841 }
Willy Tarreau44791242012-09-12 23:27:21 +02001842
Willy Tarreau44791242012-09-12 23:27:21 +02001843 return 0;
1844}
1845#endif
1846
Willy Tarreaue5733232019-05-22 19:24:06 +02001847#ifdef USE_NS
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001848/* parse the "namespace" bind keyword */
1849static int bind_parse_namespace(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1850{
1851 struct listener *l;
1852 char *namespace = NULL;
1853
1854 if (!*args[cur_arg + 1]) {
1855 memprintf(err, "'%s' : missing namespace id", args[cur_arg]);
1856 return ERR_ALERT | ERR_FATAL;
1857 }
1858 namespace = args[cur_arg + 1];
1859
1860 list_for_each_entry(l, &conf->listeners, by_bind) {
1861 l->netns = netns_store_lookup(namespace, strlen(namespace));
1862
1863 if (l->netns == NULL)
1864 l->netns = netns_store_insert(namespace);
1865
1866 if (l->netns == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001867 ha_alert("Cannot open namespace '%s'.\n", args[cur_arg + 1]);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001868 return ERR_ALERT | ERR_FATAL;
1869 }
1870 }
1871 return 0;
1872}
1873#endif
1874
Willy Tarreau163d4622015-10-13 16:16:41 +02001875#ifdef TCP_USER_TIMEOUT
1876/* parse the "tcp-ut" server keyword */
1877static int srv_parse_tcp_ut(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1878{
1879 const char *ptr = NULL;
1880 unsigned int timeout;
1881
1882 if (!*args[*cur_arg + 1]) {
1883 memprintf(err, "'%s' : missing TCP User Timeout value", args[*cur_arg]);
1884 return ERR_ALERT | ERR_FATAL;
1885 }
1886
1887 ptr = parse_time_err(args[*cur_arg + 1], &timeout, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +02001888 if (ptr == PARSE_TIME_OVER) {
1889 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
1890 args[*cur_arg+1], args[*cur_arg]);
1891 return ERR_ALERT | ERR_FATAL;
1892 }
1893 else if (ptr == PARSE_TIME_UNDER) {
1894 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
1895 args[*cur_arg+1], args[*cur_arg]);
1896 return ERR_ALERT | ERR_FATAL;
1897 }
1898 else if (ptr) {
Willy Tarreau163d4622015-10-13 16:16:41 +02001899 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[*cur_arg]);
1900 return ERR_ALERT | ERR_FATAL;
1901 }
1902
1903 if (newsrv->addr.ss_family == AF_INET || newsrv->addr.ss_family == AF_INET6)
1904 newsrv->tcp_ut = timeout;
1905
1906 return 0;
1907}
1908#endif
1909
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001910
Willy Tarreau4a129812012-04-25 17:31:42 +02001911/* Note: must not be declared <const> as its list will be overwritten.
1912 * Note: fetches that may return multiple types must be declared as the lowest
1913 * common denominator, the type that can be casted into all other ones. For
1914 * instance v4/v6 must be declared v4.
1915 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02001916static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001917 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001918 { "dst_is_local", smp_fetch_dst_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001919 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001920 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001921 { "src_is_local", smp_fetch_src_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001922 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001923#ifdef TCP_INFO
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001924 { "fc_rtt", smp_fetch_fc_rtt, ARG1(0,STR), val_fc_time_value, SMP_T_SINT, SMP_USE_L4CLI },
1925 { "fc_rttvar", smp_fetch_fc_rttvar, ARG1(0,STR), val_fc_time_value, SMP_T_SINT, SMP_USE_L4CLI },
Joe Williams30fcd392016-08-10 07:06:44 -07001926#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001927 { "fc_unacked", smp_fetch_fc_unacked, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1928 { "fc_sacked", smp_fetch_fc_sacked, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1929 { "fc_retrans", smp_fetch_fc_retrans, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1930 { "fc_fackets", smp_fetch_fc_fackets, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1931 { "fc_lost", smp_fetch_fc_lost, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1932 { "fc_reordering", smp_fetch_fc_reordering, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
Joe Williams30fcd392016-08-10 07:06:44 -07001933#endif // linux || freebsd || netbsd
1934#endif // TCP_INFO
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001935 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02001936}};
1937
Willy Tarreau0108d902018-11-25 19:14:37 +01001938INITCALL1(STG_REGISTER, sample_register_fetches, &sample_fetch_keywords);
1939
Willy Tarreau44791242012-09-12 23:27:21 +02001940/************************************************************************/
1941/* All supported bind keywords must be declared here. */
1942/************************************************************************/
1943
1944/* Note: must not be declared <const> as its list will be overwritten.
1945 * Please take care of keeping this list alphabetically sorted, doing so helps
1946 * all code contributors.
1947 * Optional keywords are also declared with a NULL ->parse() function so that
1948 * the config parser can report an appropriate error when a known keyword was
1949 * not enabled.
1950 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02001951static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02001952#ifdef TCP_DEFER_ACCEPT
1953 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
1954#endif
1955#ifdef SO_BINDTODEVICE
1956 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
1957#endif
1958#ifdef TCP_MAXSEG
1959 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
1960#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01001961#ifdef TCP_USER_TIMEOUT
1962 { "tcp-ut", bind_parse_tcp_ut, 1 }, /* set User Timeout on listening socket */
1963#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001964#ifdef TCP_FASTOPEN
1965 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
1966#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02001967#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001968 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
1969#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001970#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001971 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001972 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
1973#endif
Willy Tarreaue5733232019-05-22 19:24:06 +02001974#ifdef USE_NS
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001975 { "namespace", bind_parse_namespace, 1 },
1976#endif
Willy Tarreau44791242012-09-12 23:27:21 +02001977 /* the versions with the NULL parse function*/
1978 { "defer-accept", NULL, 0 },
1979 { "interface", NULL, 1 },
1980 { "mss", NULL, 1 },
1981 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01001982 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001983 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02001984 { NULL, NULL, 0 },
1985}};
1986
Willy Tarreau0108d902018-11-25 19:14:37 +01001987INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws);
1988
Willy Tarreau163d4622015-10-13 16:16:41 +02001989static struct srv_kw_list srv_kws = { "TCP", { }, {
1990#ifdef TCP_USER_TIMEOUT
Frédéric Lécaille5c3cd972017-03-15 16:36:09 +01001991 { "tcp-ut", srv_parse_tcp_ut, 1, 1 }, /* set TCP user timeout on server */
Willy Tarreau163d4622015-10-13 16:16:41 +02001992#endif
1993 { NULL, NULL, 0 },
1994}};
Willy Tarreau2d392c22015-08-24 01:43:45 +02001995
Willy Tarreau0108d902018-11-25 19:14:37 +01001996INITCALL1(STG_REGISTER, srv_register_keywords, &srv_kws);
1997
Willy Tarreau2d392c22015-08-24 01:43:45 +02001998static struct action_kw_list tcp_req_conn_actions = {ILH, {
William Lallemand13e9b0c2016-05-25 02:34:07 +02001999 { "set-src", tcp_parse_set_src_dst },
2000 { "set-src-port", tcp_parse_set_src_dst },
2001 { "set-dst" , tcp_parse_set_src_dst },
2002 { "set-dst-port", tcp_parse_set_src_dst },
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002003 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002004 { /* END */ }
2005}};
2006
Willy Tarreau0108d902018-11-25 19:14:37 +01002007INITCALL1(STG_REGISTER, tcp_req_conn_keywords_register, &tcp_req_conn_actions);
2008
Willy Tarreau620408f2016-10-21 16:37:51 +02002009static struct action_kw_list tcp_req_sess_actions = {ILH, {
Willy Tarreau620408f2016-10-21 16:37:51 +02002010 { "set-src", tcp_parse_set_src_dst },
2011 { "set-src-port", tcp_parse_set_src_dst },
2012 { "set-dst" , tcp_parse_set_src_dst },
2013 { "set-dst-port", tcp_parse_set_src_dst },
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002014 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau620408f2016-10-21 16:37:51 +02002015 { /* END */ }
2016}};
2017
Willy Tarreau0108d902018-11-25 19:14:37 +01002018INITCALL1(STG_REGISTER, tcp_req_sess_keywords_register, &tcp_req_sess_actions);
2019
Willy Tarreau2d392c22015-08-24 01:43:45 +02002020static struct action_kw_list tcp_req_cont_actions = {ILH, {
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002021 { "set-dst" , tcp_parse_set_src_dst },
2022 { "set-dst-port", tcp_parse_set_src_dst },
2023 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002024 { /* END */ }
2025}};
2026
Willy Tarreau0108d902018-11-25 19:14:37 +01002027INITCALL1(STG_REGISTER, tcp_req_cont_keywords_register, &tcp_req_cont_actions);
2028
Willy Tarreau2d392c22015-08-24 01:43:45 +02002029static struct action_kw_list tcp_res_cont_actions = {ILH, {
2030 { "silent-drop", tcp_parse_silent_drop },
2031 { /* END */ }
2032}};
2033
Willy Tarreau0108d902018-11-25 19:14:37 +01002034INITCALL1(STG_REGISTER, tcp_res_cont_keywords_register, &tcp_res_cont_actions);
2035
Willy Tarreau2d392c22015-08-24 01:43:45 +02002036static struct action_kw_list http_req_actions = {ILH, {
William Lallemand2e785f22016-05-25 01:48:42 +02002037 { "silent-drop", tcp_parse_silent_drop },
William Lallemand13e9b0c2016-05-25 02:34:07 +02002038 { "set-src", tcp_parse_set_src_dst },
2039 { "set-src-port", tcp_parse_set_src_dst },
2040 { "set-dst", tcp_parse_set_src_dst },
2041 { "set-dst-port", tcp_parse_set_src_dst },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002042 { /* END */ }
2043}};
2044
Willy Tarreau0108d902018-11-25 19:14:37 +01002045INITCALL1(STG_REGISTER, http_req_keywords_register, &http_req_actions);
2046
Willy Tarreau2d392c22015-08-24 01:43:45 +02002047static struct action_kw_list http_res_actions = {ILH, {
2048 { "silent-drop", tcp_parse_silent_drop },
2049 { /* END */ }
2050}};
2051
Willy Tarreau0108d902018-11-25 19:14:37 +01002052INITCALL1(STG_REGISTER, http_res_keywords_register, &http_res_actions);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002053
Willy Tarreau80713382018-11-26 10:19:54 +01002054REGISTER_BUILD_OPTS("Built with transparent proxy support using:"
Willy Tarreauba962912016-12-21 18:55:02 +01002055#if defined(IP_TRANSPARENT)
Willy Tarreau80713382018-11-26 10:19:54 +01002056 " IP_TRANSPARENT"
Willy Tarreauba962912016-12-21 18:55:02 +01002057#endif
2058#if defined(IPV6_TRANSPARENT)
Willy Tarreau80713382018-11-26 10:19:54 +01002059 " IPV6_TRANSPARENT"
Willy Tarreauba962912016-12-21 18:55:02 +01002060#endif
2061#if defined(IP_FREEBIND)
Willy Tarreau80713382018-11-26 10:19:54 +01002062 " IP_FREEBIND"
Willy Tarreauba962912016-12-21 18:55:02 +01002063#endif
2064#if defined(IP_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002065 " IP_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002066#endif
2067#if defined(IPV6_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002068 " IPV6_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002069#endif
2070#if defined(SO_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002071 " SO_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002072#endif
Willy Tarreau80713382018-11-26 10:19:54 +01002073 "");
Willy Tarreaue6b98942007-10-29 01:09:36 +01002074
2075
2076/*
2077 * Local variables:
2078 * c-indent-level: 8
2079 * c-basic-offset: 8
2080 * End:
2081 */