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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 Tarreaue6b98942007-10-29 01:09:36 +010033#include <common/compat.h>
34#include <common/config.h>
35#include <common/debug.h>
36#include <common/errors.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010037#include <common/initcall.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010038#include <common/mini-clist.h>
39#include <common/standard.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010040#include <common/namespace.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010041
Willy Tarreau39713102016-11-25 15:49:32 +010042#include <types/action.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020043#include <types/connection.h>
Willy Tarreau39713102016-11-25 15:49:32 +010044#include <types/global.h>
45#include <types/stream.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010046
Willy Tarreau9fcb9842012-04-20 14:45:49 +020047#include <proto/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020048#include <proto/channel.h>
Willy Tarreaud2274c62012-07-06 14:29:45 +020049#include <proto/connection.h>
Willy Tarreaudd2f85e2012-09-02 22:34:23 +020050#include <proto/fd.h>
Willy Tarreau61c112a2018-10-02 16:43:32 +020051#include <proto/http_rules.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020052#include <proto/listener.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020053#include <proto/log.h>
54#include <proto/port_range.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020055#include <proto/protocol.h>
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020056#include <proto/http_ana.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010057#include <proto/proto_tcp.h>
Willy Tarreaub6866442008-07-14 23:54:42 +020058#include <proto/proxy.h>
Willy Tarreaucd3b0942012-04-27 21:52:18 +020059#include <proto/sample.h>
Willy Tarreau163d4622015-10-13 16:16:41 +020060#include <proto/server.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020061#include <proto/task.h>
Willy Tarreau39713102016-11-25 15:49:32 +010062#include <proto/tcp_rules.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010063
Emeric Bruncf20bf12010-10-22 16:06:11 +020064static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
65static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020066static void tcpv4_add_listener(struct listener *listener, int port);
67static void tcpv6_add_listener(struct listener *listener, int port);
Willy Tarreaue6b98942007-10-29 01:09:36 +010068
69/* Note: must not be declared <const> as its list will be overwritten */
70static struct protocol proto_tcpv4 = {
71 .name = "tcpv4",
72 .sock_domain = AF_INET,
73 .sock_type = SOCK_STREAM,
74 .sock_prot = IPPROTO_TCP,
75 .sock_family = AF_INET,
76 .sock_addrlen = sizeof(struct sockaddr_in),
77 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020078 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020079 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020080 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010081 .bind_all = tcp_bind_listeners,
82 .unbind_all = unbind_all_listeners,
83 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020084 .get_src = tcp_get_src,
85 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +020086 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020087 .add = tcpv4_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010088 .listeners = LIST_HEAD_INIT(proto_tcpv4.listeners),
89 .nb_listeners = 0,
90};
91
Willy Tarreau0108d902018-11-25 19:14:37 +010092INITCALL1(STG_REGISTER, protocol_register, &proto_tcpv4);
93
Willy Tarreaue6b98942007-10-29 01:09:36 +010094/* Note: must not be declared <const> as its list will be overwritten */
95static struct protocol proto_tcpv6 = {
96 .name = "tcpv6",
97 .sock_domain = AF_INET6,
98 .sock_type = SOCK_STREAM,
99 .sock_prot = IPPROTO_TCP,
100 .sock_family = AF_INET6,
101 .sock_addrlen = sizeof(struct sockaddr_in6),
102 .l3_addrlen = 128/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +0200103 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +0200104 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +0200105 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100106 .bind_all = tcp_bind_listeners,
107 .unbind_all = unbind_all_listeners,
108 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +0200109 .get_src = tcp_get_src,
110 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +0200111 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +0200112 .add = tcpv6_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100113 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
114 .nb_listeners = 0,
115};
116
Willy Tarreau0108d902018-11-25 19:14:37 +0100117INITCALL1(STG_REGISTER, protocol_register, &proto_tcpv6);
118
Olivier Houchard153659f2017-04-05 22:39:56 +0200119/* Default TCP parameters, got by opening a temporary TCP socket. */
120#ifdef TCP_MAXSEG
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100121static THREAD_LOCAL int default_tcp_maxseg = -1;
122static THREAD_LOCAL int default_tcp6_maxseg = -1;
Olivier Houchard153659f2017-04-05 22:39:56 +0200123#endif
124
David du Colombier6f5ccb12011-03-10 22:26:24 +0100125/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100126 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
127 * - 0 : ignore remote address (may even be a NULL pointer)
128 * - 1 : use provided address
129 * - 2 : use provided port
130 * - 3 : use both
131 *
132 * The function supports multiple foreign binding methods :
133 * - linux_tproxy: we directly bind to the foreign address
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100134 * The second one can be used as a fallback for the first one.
135 * This function returns 0 when everything's OK, 1 if it could not bind, to the
136 * local address, 2 if it could not bind to the foreign address.
137 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100138int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100139{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100140 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100141 int foreign_ok = 0;
142 int ret;
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100143 static THREAD_LOCAL int ip_transp_working = 1;
144 static THREAD_LOCAL int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200145
David du Colombier65c17962012-07-13 14:34:59 +0200146 switch (local->ss_family) {
147 case AF_INET:
148 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200149 /* This deserves some explanation. Some platforms will support
150 * multiple combinations of certain methods, so we try the
151 * supported ones until one succeeds.
152 */
153 if (0
154#if defined(IP_TRANSPARENT)
155 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
156#endif
157#if defined(IP_FREEBIND)
158 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
159#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200160#if defined(IP_BINDANY)
161 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
162#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200163#if defined(SO_BINDANY)
164 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
165#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200166 )
David du Colombier65c17962012-07-13 14:34:59 +0200167 foreign_ok = 1;
168 else
169 ip_transp_working = 0;
170 }
171 break;
172 case AF_INET6:
173 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200174 if (0
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200175#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200176 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
177#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100178#if defined(IP_FREEBIND)
179 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
180#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200181#if defined(IPV6_BINDANY)
182 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
183#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200184#if defined(SO_BINDANY)
185 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
186#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200187 )
David du Colombier65c17962012-07-13 14:34:59 +0200188 foreign_ok = 1;
189 else
190 ip6_transp_working = 0;
191 }
192 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100193 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200194
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100195 if (flags) {
196 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200197 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100198 switch (remote->ss_family) {
199 case AF_INET:
200 if (flags & 1)
201 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
202 if (flags & 2)
203 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
204 break;
205 case AF_INET6:
206 if (flags & 1)
207 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
208 if (flags & 2)
209 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
210 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100211 default:
212 /* we don't want to try to bind to an unknown address family */
213 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100214 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100215 }
216
Simon Hormande072bd2011-06-24 15:11:37 +0900217 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100218 if (foreign_ok) {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200219 if (is_inet_addr(&bind_addr)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200220 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
221 if (ret < 0)
222 return 2;
223 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100224 }
225 else {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200226 if (is_inet_addr(local)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200227 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
228 if (ret < 0)
229 return 1;
230 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100231 }
232
233 if (!flags)
234 return 0;
235
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100236 if (!foreign_ok)
237 /* we could not bind to a foreign address */
238 return 2;
239
240 return 0;
241}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100242
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200243/* conn->dst MUST be valid */
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100244static int create_server_socket(struct connection *conn)
245{
Willy Tarreau529c1392014-12-24 13:47:55 +0100246 const struct netns_entry *ns = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100247
Willy Tarreaue5733232019-05-22 19:24:06 +0200248#ifdef USE_NS
Willy Tarreau529c1392014-12-24 13:47:55 +0100249 if (objt_server(conn->target)) {
250 if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
251 ns = conn->proxy_netns;
252 else
253 ns = __objt_server(conn->target)->netns;
254 }
255#endif
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200256 return my_socketat(ns, conn->dst->ss_family, SOCK_STREAM, IPPROTO_TCP);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100257}
Willy Tarreau9650f372009-08-16 14:02:45 +0200258
259/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200260 * This function initiates a TCP connection establishment to the target assigned
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200261 * to connection <conn> using (si->{target,dst}). A source address may be
262 * pointed to by conn->src in case of transparent proxying. Normal source
Willy Tarreau14f8e862012-08-30 22:23:13 +0200263 * bind addresses are still determined locally (due to the possible need of a
264 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100265 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100266 * supported. The <data> parameter is a boolean indicating whether there are data
267 * waiting for being sent or not, in order to adjust data write polling and on
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200268 * some platforms, the ability to avoid an empty initial ACK. The <flags> argument
269 * allows the caller to force using a delayed ACK when establishing the connection
Willy Tarreauf0837b22012-11-24 10:24:27 +0100270 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200271 * - CONNECT_DELACK_SMART_CONNECT = delayed ACK if backend has tcp-smart-connect, regardless of data
272 * - CONNECT_DELACK_ALWAYS = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200273 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200274 * Note that a pending send_proxy message accounts for data.
275 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200276 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +0200277 * - SF_ERR_NONE if everything's OK
278 * - SF_ERR_SRVTO if there are no more servers
279 * - SF_ERR_SRVCL if the connection was refused by the server
280 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
281 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
282 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +0100283 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100284 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200285 * The connection's fd is inserted only when SF_ERR_NONE is returned, otherwise
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100286 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200287 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100288
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200289int tcp_connect_server(struct connection *conn, int flags)
Willy Tarreau9650f372009-08-16 14:02:45 +0200290{
291 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100292 struct server *srv;
293 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100294 struct conn_src *src;
Willy Tarreau034c88c2017-01-23 23:36:45 +0100295 int use_fastopen = 0;
Alexander Liu2a54bb72019-05-22 19:44:48 +0800296 struct sockaddr_storage *addr;
Willy Tarreauac825402011-03-04 22:04:29 +0100297
Olivier Houchard637b6952018-11-23 14:23:07 +0100298 conn->flags |= CO_FL_WAIT_L4_CONN; /* connection in progress */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100299
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100300 switch (obj_type(conn->target)) {
301 case OBJ_TYPE_PROXY:
302 be = objt_proxy(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100303 srv = NULL;
304 break;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100305 case OBJ_TYPE_SERVER:
306 srv = objt_server(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100307 be = srv->proxy;
Willy Tarreau034c88c2017-01-23 23:36:45 +0100308 /* Make sure we check that we have data before activating
309 * TFO, or we could trigger a kernel issue whereby after
310 * a successful connect() == 0, any subsequent connect()
311 * will return EINPROGRESS instead of EISCONN.
312 */
313 use_fastopen = (srv->flags & SRV_F_FASTOPEN) &&
314 ((flags & (CONNECT_CAN_USE_TFO | CONNECT_HAS_DATA)) ==
315 (CONNECT_CAN_USE_TFO | CONNECT_HAS_DATA));
Willy Tarreauac825402011-03-04 22:04:29 +0100316 break;
317 default:
Willy Tarreau9ce70132014-01-24 16:08:19 +0100318 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200319 return SF_ERR_INTERNAL;
Willy Tarreauac825402011-03-04 22:04:29 +0100320 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200321
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200322 if (!conn->dst) {
323 conn->flags |= CO_FL_ERROR;
324 return SF_ERR_INTERNAL;
325 }
326
Willy Tarreau585744b2017-08-24 14:31:19 +0200327 fd = conn->handle.fd = create_server_socket(conn);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100328
329 if (fd == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200330 qfprintf(stderr, "Cannot get a server socket.\n");
331
Willy Tarreau9ce70132014-01-24 16:08:19 +0100332 if (errno == ENFILE) {
333 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200334 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100335 "Proxy %s reached system FD limit (maxsock=%d). Please check system tunables.\n",
336 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100337 }
338 else if (errno == EMFILE) {
339 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200340 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100341 "Proxy %s reached process FD limit (maxsock=%d). Please check 'ulimit-n' and restart.\n",
342 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100343 }
344 else if (errno == ENOBUFS || errno == ENOMEM) {
345 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200346 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100347 "Proxy %s reached system memory limit (maxsock=%d). Please check system tunables.\n",
348 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100349 }
350 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
351 conn->err_code = CO_ER_NOPROTO;
352 }
353 else
354 conn->err_code = CO_ER_SOCK_ERR;
355
Willy Tarreau9650f372009-08-16 14:02:45 +0200356 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100357 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200358 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200359 }
360
361 if (fd >= global.maxsock) {
362 /* do not log anything there, it's a normal condition when this option
363 * is used to serialize connections to a server !
364 */
Christopher Faulet767a84b2017-11-24 16:50:31 +0100365 ha_alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
Willy Tarreau9650f372009-08-16 14:02:45 +0200366 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100367 conn->err_code = CO_ER_CONF_FDLIM;
368 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200369 return SF_ERR_PRXCOND; /* it is a configuration limit */
Willy Tarreau9650f372009-08-16 14:02:45 +0200370 }
371
372 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900373 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200374 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
375 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100376 conn->err_code = CO_ER_SOCK_ERR;
377 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200378 return SF_ERR_INTERNAL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200379 }
380
William Lallemandc03eb012018-11-27 12:02:37 +0100381 if (master == 1 && (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)) {
382 ha_alert("Cannot set CLOEXEC on client socket.\n");
383 close(fd);
384 conn->err_code = CO_ER_SOCK_ERR;
385 conn->flags |= CO_FL_ERROR;
386 return SF_ERR_INTERNAL;
387 }
388
Willy Tarreau9650f372009-08-16 14:02:45 +0200389 if (be->options & PR_O_TCP_SRV_KA)
Simon Hormande072bd2011-06-24 15:11:37 +0900390 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200391
Willy Tarreau9650f372009-08-16 14:02:45 +0200392 /* allow specific binding :
393 * - server-specific at first
394 * - proxy-specific next
395 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100396 if (srv && srv->conn_src.opts & CO_SRC_BIND)
397 src = &srv->conn_src;
398 else if (be->conn_src.opts & CO_SRC_BIND)
399 src = &be->conn_src;
400 else
401 src = NULL;
402
403 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200404 int ret, flags = 0;
405
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200406 if (conn->src && is_inet_addr(conn->src)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100407 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100408 case CO_SRC_TPROXY_CLI:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200409 conn->flags |= CO_FL_PRIVATE;
410 /* fall through */
411 case CO_SRC_TPROXY_ADDR:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200412 flags = 3;
413 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100414 case CO_SRC_TPROXY_CIP:
415 case CO_SRC_TPROXY_DYN:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200416 conn->flags |= CO_FL_PRIVATE;
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200417 flags = 1;
418 break;
419 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200420 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200421
Willy Tarreau9650f372009-08-16 14:02:45 +0200422#ifdef SO_BINDTODEVICE
423 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100424 if (src->iface_name)
425 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200426#endif
427
Willy Tarreaua4380b42012-12-08 22:49:11 +0100428 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200429 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100430 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200431
432 ret = 1;
Vincent Bernat6e615892016-05-18 16:17:44 +0200433 memcpy(&sa, &src->source_addr, sizeof(sa));
Willy Tarreau9650f372009-08-16 14:02:45 +0200434
435 do {
436 /* note: in case of retry, we may have to release a previously
437 * allocated port, hence this loop's construct.
438 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200439 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
440 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200441
442 if (!attempts)
443 break;
444 attempts--;
445
Willy Tarreaua4380b42012-12-08 22:49:11 +0100446 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100447 if (!fdinfo[fd].local_port) {
448 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200449 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100450 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200451
Willy Tarreaua4380b42012-12-08 22:49:11 +0100452 fdinfo[fd].port_range = src->sport_range;
453 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200454
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200455 ret = tcp_bind_socket(fd, flags, &sa, conn->src);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100456 if (ret != 0)
457 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200458 } while (ret != 0); /* binding NOK */
459 }
460 else {
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000461#ifdef IP_BIND_ADDRESS_NO_PORT
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100462 static THREAD_LOCAL int bind_address_no_port = 1;
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000463 setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
464#endif
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200465 ret = tcp_bind_socket(fd, flags, &src->source_addr, conn->src);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100466 if (ret != 0)
467 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200468 }
469
Willy Tarreaua4380b42012-12-08 22:49:11 +0100470 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200471 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
472 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200473 close(fd);
474
Willy Tarreau9650f372009-08-16 14:02:45 +0200475 if (ret == 1) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100476 ha_alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
477 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200478 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100479 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200480 be->id);
481 } else {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100482 ha_alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
483 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200484 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100485 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200486 be->id);
487 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100488 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200489 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200490 }
491 }
492
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400493#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200494 /* disabling tcp quick ack now allows the first request to leave the
495 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100496 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200497 */
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200498 if (flags & (CONNECT_DELACK_ALWAYS) ||
499 ((flags & CONNECT_DELACK_SMART_CONNECT ||
500 (flags & CONNECT_HAS_DATA) || conn->send_proxy_ofs) &&
501 (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900502 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200503#endif
504
Willy Tarreau163d4622015-10-13 16:16:41 +0200505#ifdef TCP_USER_TIMEOUT
506 /* there is not much more we can do here when it fails, it's still minor */
507 if (srv && srv->tcp_ut)
508 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &srv->tcp_ut, sizeof(srv->tcp_ut));
509#endif
Willy Tarreau034c88c2017-01-23 23:36:45 +0100510
511 if (use_fastopen) {
512#if defined(TCP_FASTOPEN_CONNECT)
513 setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN_CONNECT, &one, sizeof(one));
514#endif
515 }
Willy Tarreaue803de22010-01-21 17:43:04 +0100516 if (global.tune.server_sndbuf)
517 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
518
519 if (global.tune.server_rcvbuf)
520 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
521
Willy Tarreau7bbc4a52019-07-17 15:41:35 +0200522 addr = (conn->flags & CO_FL_SOCKS4) ? &srv->socks4_addr : conn->dst;
Alexander Liu2a54bb72019-05-22 19:44:48 +0800523 if (connect(fd, (const struct sockaddr *)addr, get_addr_len(addr)) == -1) {
Willy Tarreau819efbf2017-01-25 14:12:22 +0100524 if (errno == EINPROGRESS || errno == EALREADY) {
525 /* common case, let's wait for connect status */
526 conn->flags |= CO_FL_WAIT_L4_CONN;
527 }
528 else if (errno == EISCONN) {
529 /* should normally not happen but if so, indicates that it's OK */
530 conn->flags &= ~CO_FL_WAIT_L4_CONN;
531 }
532 else if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200533 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100534 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200535 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100536 conn->err_code = CO_ER_FREE_PORTS;
537 }
538 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200539 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100540 conn->err_code = CO_ER_ADDR_INUSE;
541 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200542
Willy Tarreaub1719512012-12-08 23:03:28 +0100543 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200544 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
545 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200546 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100547 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100548 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200549 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200550 } else if (errno == ETIMEDOUT) {
551 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200552 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
553 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200554 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100555 conn->err_code = CO_ER_SOCK_ERR;
556 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200557 return SF_ERR_SRVTO;
Willy Tarreau9650f372009-08-16 14:02:45 +0200558 } else {
559 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
560 //qfprintf(stderr,"Connect(): %d", errno);
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_SRVCL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200567 }
568 }
Willy Tarreau819efbf2017-01-25 14:12:22 +0100569 else {
570 /* connect() == 0, this is great! */
571 conn->flags &= ~CO_FL_WAIT_L4_CONN;
572 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200573
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100574 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200575
Willy Tarreauf79c8172013-10-21 16:30:56 +0200576 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100577 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200578
Willy Tarreauccf3f6d2019-09-05 17:05:05 +0200579 if (conn->flags & CO_FL_WAIT_L4_CONN)
580 fd_cant_recv(fd); // we'll change this once the connection is validated
581
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200582 if (conn_xprt_init(conn) < 0) {
Willy Tarreau3f2770b2017-10-05 18:01:29 +0200583 conn_full_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100584 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200585 return SF_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200586 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200587
Olivier Houchard03abf2d2019-05-28 10:12:02 +0200588 conn_xprt_want_send(conn); /* for connect status, proxy protocol or SSL */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200589 return SF_ERR_NONE; /* connection is OK */
Willy Tarreau9650f372009-08-16 14:02:45 +0200590}
591
592
Willy Tarreau59b94792012-05-11 16:16:40 +0200593/*
594 * Retrieves the source address for the socket <fd>, with <dir> indicating
595 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
596 * success, -1 in case of error. The socket's source address is stored in
597 * <sa> for <salen> bytes.
598 */
599int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
600{
601 if (dir)
602 return getsockname(fd, sa, &salen);
603 else
604 return getpeername(fd, sa, &salen);
605}
606
607
608/*
609 * Retrieves the original destination address for the socket <fd>, with <dir>
610 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
611 * listener, if the original destination address was translated, the original
612 * address is retrieved. It returns 0 in case of success, -1 in case of error.
613 * The socket's source address is stored in <sa> for <salen> bytes.
614 */
615int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
616{
617 if (dir)
618 return getpeername(fd, sa, &salen);
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100619 else {
620 int ret = getsockname(fd, sa, &salen);
621
622 if (ret < 0)
623 return ret;
624
Willy Tarreaue5733232019-05-22 19:24:06 +0200625#if defined(USE_TPROXY) && defined(SO_ORIGINAL_DST)
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100626 /* For TPROXY and Netfilter's NAT, we can retrieve the original
627 * IPv4 address before DNAT/REDIRECT. We must not do that with
628 * other families because v6-mapped IPv4 addresses are still
629 * reported as v4.
630 */
631 if (((struct sockaddr_storage *)sa)->ss_family == AF_INET
632 && getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
633 return 0;
Willy Tarreau59b94792012-05-11 16:16:40 +0200634#endif
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100635 return ret;
636 }
Willy Tarreau59b94792012-05-11 16:16:40 +0200637}
638
Olivier Houchard153659f2017-04-05 22:39:56 +0200639/* XXX: Should probably be elsewhere */
640static int compare_sockaddr(struct sockaddr_storage *a, struct sockaddr_storage *b)
641{
642 if (a->ss_family != b->ss_family) {
643 return (-1);
644 }
645 switch (a->ss_family) {
646 case AF_INET:
647 {
648 struct sockaddr_in *a4 = (void *)a, *b4 = (void *)b;
649 if (a4->sin_port != b4->sin_port)
650 return (-1);
651 return (memcmp(&a4->sin_addr, &b4->sin_addr,
652 sizeof(a4->sin_addr)));
653 }
654 case AF_INET6:
655 {
656 struct sockaddr_in6 *a6 = (void *)a, *b6 = (void *)b;
657 if (a6->sin6_port != b6->sin6_port)
658 return (-1);
659 return (memcmp(&a6->sin6_addr, &b6->sin6_addr,
660 sizeof(a6->sin6_addr)));
661 }
662 default:
663 return (-1);
664 }
665
666}
667
668#define LI_MANDATORY_FLAGS (LI_O_FOREIGN | LI_O_V6ONLY | LI_O_V4V6)
669/* When binding the listeners, check if a socket has been sent to us by the
670 * previous process that we could reuse, instead of creating a new one.
671 */
672static int tcp_find_compatible_fd(struct listener *l)
673{
674 struct xfer_sock_list *xfer_sock = xfer_sock_list;
675 int ret = -1;
676
677 while (xfer_sock) {
678 if (!compare_sockaddr(&xfer_sock->addr, &l->addr)) {
679 if ((l->interface == NULL && xfer_sock->iface == NULL) ||
680 (l->interface != NULL && xfer_sock->iface != NULL &&
681 !strcmp(l->interface, xfer_sock->iface))) {
682 if ((l->options & LI_MANDATORY_FLAGS) ==
683 (xfer_sock->options & LI_MANDATORY_FLAGS)) {
684 if ((xfer_sock->namespace == NULL &&
685 l->netns == NULL)
Willy Tarreaue5733232019-05-22 19:24:06 +0200686#ifdef USE_NS
Olivier Houchard153659f2017-04-05 22:39:56 +0200687 || (xfer_sock->namespace != NULL &&
688 l->netns != NULL &&
689 !strcmp(xfer_sock->namespace,
690 l->netns->node.key))
691#endif
692 ) {
693 break;
694 }
695
696 }
697 }
698 }
699 xfer_sock = xfer_sock->next;
700 }
701 if (xfer_sock != NULL) {
702 ret = xfer_sock->fd;
703 if (xfer_sock == xfer_sock_list)
704 xfer_sock_list = xfer_sock->next;
705 if (xfer_sock->prev)
706 xfer_sock->prev->next = xfer_sock->next;
707 if (xfer_sock->next)
708 xfer_sock->next->prev = xfer_sock->prev;
709 free(xfer_sock->iface);
710 free(xfer_sock->namespace);
711 free(xfer_sock);
712 }
713 return ret;
714}
715#undef L1_MANDATORY_FLAGS
Willy Tarreau59b94792012-05-11 16:16:40 +0200716
Willy Tarreaue6b98942007-10-29 01:09:36 +0100717/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100718 * an error message in <errmsg> if the message is at most <errlen> bytes long
719 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
720 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100721 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
722 * was alright and that no message was returned. ERR_RETRYABLE means that an
723 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700724 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100725 * the meaning of the error, but just indicate that a message is present which
726 * should be displayed with the respective level. Last, ERR_ABORT indicates
727 * that it's pointless to try to start other listeners. No error message is
728 * returned if errlen is NULL.
729 */
730int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
731{
732 __label__ tcp_return, tcp_close_return;
733 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100734 int ext, ready;
735 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100736 const char *msg = NULL;
Olivier Houchard153659f2017-04-05 22:39:56 +0200737#ifdef TCP_MAXSEG
738
739 /* Create a temporary TCP socket to get default parameters we can't
740 * guess.
741 * */
742 ready_len = sizeof(default_tcp_maxseg);
743 if (default_tcp_maxseg == -1) {
744 default_tcp_maxseg = -2;
745 fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
746 if (fd < 0)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100747 ha_warning("Failed to create a temporary socket!\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200748 else {
749 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp_maxseg,
750 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100751 ha_warning("Failed to get the default value of TCP_MAXSEG\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200752 }
753 close(fd);
754 }
755 if (default_tcp6_maxseg == -1) {
756 default_tcp6_maxseg = -2;
757 fd = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
758 if (fd >= 0) {
759 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp6_maxseg,
760 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100761 ha_warning("Failed ot get the default value of TCP_MAXSEG for IPv6\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200762 close(fd);
763 }
764 }
765#endif
766
Willy Tarreaue6b98942007-10-29 01:09:36 +0100767
768 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100769 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100770 *errmsg = 0;
771
772 if (listener->state != LI_ASSIGNED)
773 return ERR_NONE; /* already bound */
774
775 err = ERR_NONE;
776
Olivier Houchard153659f2017-04-05 22:39:56 +0200777 if (listener->fd == -1)
778 listener->fd = tcp_find_compatible_fd(listener);
779
Willy Tarreau40aa0702013-03-10 23:51:38 +0100780 /* if the listener already has an fd assigned, then we were offered the
781 * fd by an external process (most likely the parent), and we don't want
782 * to create a new socket. However we still want to set a few flags on
783 * the socket.
784 */
785 fd = listener->fd;
786 ext = (fd >= 0);
787
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100788 if (!ext) {
789 fd = my_socketat(listener->netns, listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
790
791 if (fd == -1) {
792 err |= ERR_RETRYABLE | ERR_ALERT;
793 msg = "cannot create listening socket";
794 goto tcp_return;
795 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100796 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100797
Willy Tarreaue6b98942007-10-29 01:09:36 +0100798 if (fd >= global.maxsock) {
799 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
800 msg = "not enough free sockets (raise '-n' parameter)";
801 goto tcp_close_return;
802 }
803
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200804 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100805 err |= ERR_FATAL | ERR_ALERT;
806 msg = "cannot make socket non-blocking";
807 goto tcp_close_return;
808 }
809
Willy Tarreau40aa0702013-03-10 23:51:38 +0100810 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100811 /* not fatal but should be reported */
812 msg = "cannot do so_reuseaddr";
813 err |= ERR_ALERT;
814 }
815
816 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900817 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Olivier Houchard153659f2017-04-05 22:39:56 +0200818 else {
819 struct linger tmplinger;
820 socklen_t len = sizeof(tmplinger);
821 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger, &len) == 0 &&
822 (tmplinger.l_onoff == 1 || tmplinger.l_linger == 0)) {
823 tmplinger.l_onoff = 0;
824 tmplinger.l_linger = 0;
825 setsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger,
826 sizeof(tmplinger));
827 }
828 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100829
Willy Tarreaue6b98942007-10-29 01:09:36 +0100830#ifdef SO_REUSEPORT
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000831 /* OpenBSD and Linux 3.9 support this. As it's present in old libc versions of
832 * Linux, it might return an error that we will silently ignore.
Willy Tarreaue6b98942007-10-29 01:09:36 +0100833 */
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000834 if (!ext && (global.tune.options & GTUNE_USE_REUSEPORT))
Willy Tarreau40aa0702013-03-10 23:51:38 +0100835 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100836#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200837
Willy Tarreau40aa0702013-03-10 23:51:38 +0100838 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200839 switch (listener->addr.ss_family) {
840 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200841 if (1
842#if defined(IP_TRANSPARENT)
843 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
844#endif
845#if defined(IP_FREEBIND)
846 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
847#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200848#if defined(IP_BINDANY)
849 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
850#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200851#if defined(SO_BINDANY)
852 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
853#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200854 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200855 msg = "cannot make listening socket transparent";
856 err |= ERR_ALERT;
857 }
858 break;
859 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200860 if (1
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200861#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200862 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
863#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100864#if defined(IP_FREEBIND)
865 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
866#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200867#if defined(IPV6_BINDANY)
868 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
869#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200870#if defined(SO_BINDANY)
871 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
872#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200873 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200874 msg = "cannot make listening socket transparent";
875 err |= ERR_ALERT;
876 }
877 break;
878 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100879 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200880
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100881#ifdef SO_BINDTODEVICE
882 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100883 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100884 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100885 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100886 msg = "cannot bind listener to device";
887 err |= ERR_WARN;
888 }
889 }
890#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400891#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100892 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400893 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200894 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
895 msg = "cannot set MSS";
896 err |= ERR_WARN;
897 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200898 } else if (ext) {
899 int tmpmaxseg = -1;
900 int defaultmss;
901 socklen_t len = sizeof(tmpmaxseg);
902
903 if (listener->addr.ss_family == AF_INET)
904 defaultmss = default_tcp_maxseg;
905 else
906 defaultmss = default_tcp6_maxseg;
907
908 getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &tmpmaxseg, &len);
909 if (tmpmaxseg != defaultmss && setsockopt(fd, IPPROTO_TCP,
910 TCP_MAXSEG, &defaultmss,
911 sizeof(defaultmss)) == -1) {
912 msg = "cannot set MSS";
913 err |= ERR_WARN;
914 }
Willy Tarreaube1b9182009-06-14 18:48:19 +0200915 }
916#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +0100917#if defined(TCP_USER_TIMEOUT)
918 if (listener->tcp_ut) {
919 if (setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT,
920 &listener->tcp_ut, sizeof(listener->tcp_ut)) == -1) {
921 msg = "cannot set TCP User Timeout";
922 err |= ERR_WARN;
923 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200924 } else
925 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &zero,
926 sizeof(zero));
Willy Tarreau2af207a2015-02-04 00:45:58 +0100927#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200928#if defined(TCP_DEFER_ACCEPT)
929 if (listener->options & LI_O_DEF_ACCEPT) {
930 /* defer accept by up to one second */
931 int accept_delay = 1;
932 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
933 msg = "cannot enable DEFER_ACCEPT";
934 err |= ERR_WARN;
935 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200936 } else
937 setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &zero,
938 sizeof(zero));
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200939#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +0200940#if defined(TCP_FASTOPEN)
941 if (listener->options & LI_O_TCP_FO) {
942 /* TFO needs a queue length, let's use the configured backlog */
Willy Tarreaue2711c72019-02-27 15:39:41 +0100943 int qlen = listener_backlog(listener);
Willy Tarreau1c862c52012-10-05 16:21:00 +0200944 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
945 msg = "cannot enable TCP_FASTOPEN";
946 err |= ERR_WARN;
947 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200948 } else {
949 socklen_t len;
950 int qlen;
951 len = sizeof(qlen);
952 /* Only disable fast open if it was enabled, we don't want
953 * the kernel to create a fast open queue if there's none.
954 */
955 if (getsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, &len) == 0 &&
956 qlen != 0) {
957 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &zero,
958 sizeof(zero)) == -1) {
959 msg = "cannot disable TCP_FASTOPEN";
960 err |= ERR_WARN;
961 }
962 }
Willy Tarreau1c862c52012-10-05 16:21:00 +0200963 }
964#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100965#if defined(IPV6_V6ONLY)
966 if (listener->options & LI_O_V6ONLY)
967 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +0100968 else if (listener->options & LI_O_V4V6)
969 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100970#endif
971
Willy Tarreau40aa0702013-03-10 23:51:38 +0100972 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100973 err |= ERR_RETRYABLE | ERR_ALERT;
974 msg = "cannot bind socket";
975 goto tcp_close_return;
976 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100977
Willy Tarreau40aa0702013-03-10 23:51:38 +0100978 ready = 0;
979 ready_len = sizeof(ready);
980 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
981 ready = 0;
982
983 if (!(ext && ready) && /* only listen if not already done by external process */
Willy Tarreaue2711c72019-02-27 15:39:41 +0100984 listen(fd, listener_backlog(listener)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100985 err |= ERR_RETRYABLE | ERR_ALERT;
986 msg = "cannot listen to socket";
987 goto tcp_close_return;
988 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100989
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400990#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200991 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +0900992 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Olivier Houchard153659f2017-04-05 22:39:56 +0200993 else
994 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200995#endif
996
Willy Tarreaue6b98942007-10-29 01:09:36 +0100997 /* the socket is ready */
998 listener->fd = fd;
999 listener->state = LI_LISTEN;
1000
Willy Tarreaua9786b62018-01-25 07:22:13 +01001001 fd_insert(fd, listener, listener->proto->accept,
Willy Tarreaua36b3242019-02-02 13:14:34 +01001002 thread_mask(listener->bind_conf->bind_thread));
Willy Tarreaueb472682010-05-28 18:46:57 +02001003
Willy Tarreaue6b98942007-10-29 01:09:36 +01001004 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001005 if (msg && errlen) {
1006 char pn[INET6_ADDRSTRLEN];
1007
Willy Tarreau631f01c2011-09-05 00:36:48 +02001008 addr_to_str(&listener->addr, pn, sizeof(pn));
1009 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001010 }
Willy Tarreaue6b98942007-10-29 01:09:36 +01001011 return err;
1012
1013 tcp_close_return:
1014 close(fd);
1015 goto tcp_return;
1016}
1017
1018/* This function creates all TCP sockets bound to the protocol entry <proto>.
1019 * It is intended to be used as the protocol's bind_all() function.
1020 * The sockets will be registered but not added to any fd_set, in order not to
1021 * loose them across the fork(). A call to enable_all_listeners() is needed
1022 * to complete initialization. The return value is composed from ERR_*.
Willy Tarreaudaacf362019-07-24 16:45:02 +02001023 *
1024 * Must be called with proto_lock held.
1025 *
Willy Tarreaue6b98942007-10-29 01:09:36 +01001026 */
Emeric Bruncf20bf12010-10-22 16:06:11 +02001027static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001028{
1029 struct listener *listener;
1030 int err = ERR_NONE;
1031
1032 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +02001033 err |= tcp_bind_listener(listener, errmsg, errlen);
1034 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001035 break;
1036 }
1037
1038 return err;
1039}
1040
Willy Tarreau32282382017-09-15 07:44:44 +02001041/* Add <listener> to the list of tcpv4 listeners, on port <port>. The
1042 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1043 * The number of listeners for the protocol is updated.
Willy Tarreaudaacf362019-07-24 16:45:02 +02001044 *
1045 * Must be called with proto_lock held.
1046 *
Willy Tarreaue6b98942007-10-29 01:09:36 +01001047 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001048static void tcpv4_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001049{
1050 if (listener->state != LI_INIT)
1051 return;
1052 listener->state = LI_ASSIGNED;
1053 listener->proto = &proto_tcpv4;
Willy Tarreau32282382017-09-15 07:44:44 +02001054 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001055 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
1056 proto_tcpv4.nb_listeners++;
1057}
1058
Willy Tarreau32282382017-09-15 07:44:44 +02001059/* Add <listener> to the list of tcpv6 listeners, on port <port>. The
1060 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1061 * The number of listeners for the protocol is updated.
Willy Tarreaudaacf362019-07-24 16:45:02 +02001062 *
1063 * Must be called with proto_lock held.
1064 *
Willy Tarreaue6b98942007-10-29 01:09:36 +01001065 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001066static void tcpv6_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001067{
1068 if (listener->state != LI_INIT)
1069 return;
1070 listener->state = LI_ASSIGNED;
1071 listener->proto = &proto_tcpv6;
Willy Tarreau32282382017-09-15 07:44:44 +02001072 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001073 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
1074 proto_tcpv6.nb_listeners++;
1075}
1076
Willy Tarreau092d8652014-07-07 20:22:12 +02001077/* Pause a listener. Returns < 0 in case of failure, 0 if the listener
1078 * was totally stopped, or > 0 if correctly paused.
1079 */
1080int tcp_pause_listener(struct listener *l)
1081{
1082 if (shutdown(l->fd, SHUT_WR) != 0)
1083 return -1; /* Solaris dies here */
1084
Willy Tarreaue2711c72019-02-27 15:39:41 +01001085 if (listen(l->fd, listener_backlog(l)) != 0)
Willy Tarreau092d8652014-07-07 20:22:12 +02001086 return -1; /* OpenBSD dies here */
1087
1088 if (shutdown(l->fd, SHUT_RD) != 0)
1089 return -1; /* should always be OK */
1090 return 1;
1091}
1092
William Lallemand2e785f22016-05-25 01:48:42 +02001093/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001094 * Execute the "set-src" action. May be called from {tcp,http}request.
1095 * It only changes the address and tries to preserve the original port. If the
1096 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand2e785f22016-05-25 01:48:42 +02001097 */
1098enum act_return tcp_action_req_set_src(struct act_rule *rule, struct proxy *px,
1099 struct session *sess, struct stream *s, int flags)
1100{
1101 struct connection *cli_conn;
1102
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001103 if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
William Lallemand2e785f22016-05-25 01:48:42 +02001104 struct sample *smp;
1105
1106 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1107 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001108 int port = get_net_port(cli_conn->src);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001109
William Lallemand2e785f22016-05-25 01:48:42 +02001110 if (smp->data.type == SMP_T_IPV4) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001111 ((struct sockaddr_in *)cli_conn->src)->sin_family = AF_INET;
1112 ((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
1113 ((struct sockaddr_in *)cli_conn->src)->sin_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001114 } else if (smp->data.type == SMP_T_IPV6) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001115 ((struct sockaddr_in6 *)cli_conn->src)->sin6_family = AF_INET6;
1116 memcpy(&((struct sockaddr_in6 *)cli_conn->src)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
1117 ((struct sockaddr_in6 *)cli_conn->src)->sin6_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001118 }
1119 }
William Lallemand01252ed2016-05-25 02:33:16 +02001120 cli_conn->flags |= CO_FL_ADDR_FROM_SET;
William Lallemand2e785f22016-05-25 01:48:42 +02001121 }
1122 return ACT_RET_CONT;
1123}
1124
William Lallemand44be6402016-05-25 01:51:35 +02001125/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001126 * Execute the "set-dst" action. May be called from {tcp,http}request.
1127 * It only changes the address and tries to preserve the original port. If the
1128 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001129 */
1130enum act_return tcp_action_req_set_dst(struct act_rule *rule, struct proxy *px,
1131 struct session *sess, struct stream *s, int flags)
1132{
1133 struct connection *cli_conn;
1134
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001135 if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
William Lallemand13e9b0c2016-05-25 02:34:07 +02001136 struct sample *smp;
1137
1138 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1139 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001140 int port = get_net_port(cli_conn->dst);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001141
William Lallemand13e9b0c2016-05-25 02:34:07 +02001142 if (smp->data.type == SMP_T_IPV4) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001143 ((struct sockaddr_in *)cli_conn->dst)->sin_family = AF_INET;
1144 ((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001145 } else if (smp->data.type == SMP_T_IPV6) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001146 ((struct sockaddr_in6 *)cli_conn->dst)->sin6_family = AF_INET6;
1147 memcpy(&((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
1148 ((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001149 }
1150 cli_conn->flags |= CO_FL_ADDR_TO_SET;
1151 }
1152 }
1153 return ACT_RET_CONT;
1154}
1155
1156/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001157 * Execute the "set-src-port" action. May be called from {tcp,http}request.
1158 * We must test the sin_family before setting the port. If the address family
1159 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1160 * and the port is assigned.
William Lallemand44be6402016-05-25 01:51:35 +02001161 */
1162enum act_return tcp_action_req_set_src_port(struct act_rule *rule, struct proxy *px,
1163 struct session *sess, struct stream *s, int flags)
1164{
1165 struct connection *cli_conn;
1166
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001167 if ((cli_conn = objt_conn(sess->origin)) && conn_get_src(cli_conn)) {
William Lallemand44be6402016-05-25 01:51:35 +02001168 struct sample *smp;
1169
William Lallemand44be6402016-05-25 01:51:35 +02001170 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1171 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001172 if (cli_conn->src->ss_family == AF_INET6) {
1173 ((struct sockaddr_in6 *)cli_conn->src)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001174 } else {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001175 if (cli_conn->src->ss_family != AF_INET) {
1176 cli_conn->src->ss_family = AF_INET;
1177 ((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr = 0;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001178 }
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001179 ((struct sockaddr_in *)cli_conn->src)->sin_port = htons(smp->data.u.sint);
William Lallemand44be6402016-05-25 01:51:35 +02001180 }
1181 }
1182 }
1183 return ACT_RET_CONT;
1184}
1185
William Lallemand13e9b0c2016-05-25 02:34:07 +02001186/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001187 * Execute the "set-dst-port" action. May be called from {tcp,http}request.
1188 * We must test the sin_family before setting the port. If the address family
1189 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1190 * and the port is assigned.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001191 */
1192enum act_return tcp_action_req_set_dst_port(struct act_rule *rule, struct proxy *px,
1193 struct session *sess, struct stream *s, int flags)
1194{
1195 struct connection *cli_conn;
1196
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001197 if ((cli_conn = objt_conn(sess->origin)) && conn_get_dst(cli_conn)) {
William Lallemand13e9b0c2016-05-25 02:34:07 +02001198 struct sample *smp;
1199
William Lallemand13e9b0c2016-05-25 02:34:07 +02001200 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1201 if (smp) {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001202 if (cli_conn->dst->ss_family == AF_INET6) {
1203 ((struct sockaddr_in6 *)cli_conn->dst)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001204 } else {
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001205 if (cli_conn->dst->ss_family != AF_INET) {
1206 cli_conn->dst->ss_family = AF_INET;
1207 ((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr = 0;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001208 }
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001209 ((struct sockaddr_in *)cli_conn->dst)->sin_port = htons(smp->data.u.sint);
William Lallemand13e9b0c2016-05-25 02:34:07 +02001210 }
1211 }
1212 }
1213 return ACT_RET_CONT;
1214}
1215
Willy Tarreau2d392c22015-08-24 01:43:45 +02001216/* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
1217static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct proxy *px, struct session *sess, struct stream *strm, int flags)
1218{
1219 struct connection *conn = objt_conn(sess->origin);
1220
1221 if (!conn)
1222 goto out;
1223
1224 if (!conn_ctrl_ready(conn))
1225 goto out;
1226
Willy Tarreau2d392c22015-08-24 01:43:45 +02001227#ifdef TCP_QUICKACK
Willy Tarreaufc2a2d92015-09-29 18:15:01 +02001228 /* drain is needed only to send the quick ACK */
1229 conn_sock_drain(conn);
1230
Willy Tarreau2d392c22015-08-24 01:43:45 +02001231 /* re-enable quickack if it was disabled to ack all data and avoid
1232 * retransmits from the client that might trigger a real reset.
1233 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001234 setsockopt(conn->handle.fd, SOL_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001235#endif
1236 /* lingering must absolutely be disabled so that we don't send a
1237 * shutdown(), this is critical to the TCP_REPAIR trick. When no stream
1238 * is present, returning with ERR will cause lingering to be disabled.
1239 */
1240 if (strm)
1241 strm->si[0].flags |= SI_FL_NOLINGER;
1242
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001243 /* We're on the client-facing side, we must force to disable lingering to
1244 * ensure we will use an RST exclusively and kill any pending data.
1245 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001246 fdtab[conn->handle.fd].linger_risk = 1;
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001247
Willy Tarreau2d392c22015-08-24 01:43:45 +02001248#ifdef TCP_REPAIR
Willy Tarreau585744b2017-08-24 14:31:19 +02001249 if (setsockopt(conn->handle.fd, SOL_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
Willy Tarreau2d392c22015-08-24 01:43:45 +02001250 /* socket will be quiet now */
1251 goto out;
1252 }
1253#endif
1254 /* either TCP_REPAIR is not defined or it failed (eg: permissions).
1255 * Let's fall back on the TTL trick, though it only works for routed
1256 * network and has no effect on local net.
1257 */
1258#ifdef IP_TTL
Willy Tarreau585744b2017-08-24 14:31:19 +02001259 setsockopt(conn->handle.fd, SOL_IP, IP_TTL, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001260#endif
1261 out:
1262 /* kill the stream if any */
1263 if (strm) {
1264 channel_abort(&strm->req);
1265 channel_abort(&strm->res);
1266 strm->req.analysers = 0;
1267 strm->res.analysers = 0;
Olivier Houchard40514102019-03-08 18:54:04 +01001268 _HA_ATOMIC_ADD(&strm->be->be_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001269 if (!(strm->flags & SF_ERR_MASK))
1270 strm->flags |= SF_ERR_PRXCOND;
1271 if (!(strm->flags & SF_FINST_MASK))
1272 strm->flags |= SF_FINST_R;
1273 }
1274
Olivier Houchard40514102019-03-08 18:54:04 +01001275 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001276 if (sess->listener->counters)
Olivier Houchard40514102019-03-08 18:54:04 +01001277 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001278
1279 return ACT_RET_STOP;
1280}
1281
William Lallemand13e9b0c2016-05-25 02:34:07 +02001282/* parse "set-{src,dst}[-port]" action */
1283enum 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 +02001284{
1285 int cur_arg;
1286 struct sample_expr *expr;
1287 unsigned int where;
1288
1289 cur_arg = *orig_arg;
1290 expr = sample_parse_expr((char **)args, &cur_arg, px->conf.args.file, px->conf.args.line, err, &px->conf.args);
1291 if (!expr)
1292 return ACT_RET_PRS_ERR;
1293
1294 where = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001295 if (px->cap & PR_CAP_FE)
William Lallemand2e785f22016-05-25 01:48:42 +02001296 where |= SMP_VAL_FE_HRQ_HDR;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001297 if (px->cap & PR_CAP_BE)
William Lallemand2e785f22016-05-25 01:48:42 +02001298 where |= SMP_VAL_BE_HRQ_HDR;
1299
1300 if (!(expr->fetch->val & where)) {
1301 memprintf(err,
1302 "fetch method '%s' extracts information from '%s', none of which is available here",
1303 args[cur_arg-1], sample_src_names(expr->fetch->use));
1304 free(expr);
1305 return ACT_RET_PRS_ERR;
1306 }
1307 rule->arg.expr = expr;
1308 rule->action = ACT_CUSTOM;
1309
1310 if (!strcmp(args[*orig_arg-1], "set-src")) {
1311 rule->action_ptr = tcp_action_req_set_src;
William Lallemand44be6402016-05-25 01:51:35 +02001312 } else if (!strcmp(args[*orig_arg-1], "set-src-port")) {
1313 rule->action_ptr = tcp_action_req_set_src_port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001314 } else if (!strcmp(args[*orig_arg-1], "set-dst")) {
1315 rule->action_ptr = tcp_action_req_set_dst;
1316 } else if (!strcmp(args[*orig_arg-1], "set-dst-port")) {
1317 rule->action_ptr = tcp_action_req_set_dst_port;
William Lallemand2e785f22016-05-25 01:48:42 +02001318 } else {
1319 return ACT_RET_PRS_ERR;
1320 }
1321
1322 (*orig_arg)++;
1323
1324 return ACT_RET_PRS_OK;
1325}
1326
1327
Willy Tarreau2d392c22015-08-24 01:43:45 +02001328/* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
1329 * success, ACT_RET_PRS_ERR on error.
1330 */
1331static enum act_parse_ret tcp_parse_silent_drop(const char **args, int *orig_arg, struct proxy *px,
1332 struct act_rule *rule, char **err)
1333{
1334 rule->action = ACT_CUSTOM;
1335 rule->action_ptr = tcp_exec_action_silent_drop;
1336 return ACT_RET_PRS_OK;
1337}
1338
Willy Tarreau645513a2010-05-24 20:55:15 +02001339
1340/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001341/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02001342/************************************************************************/
1343
Willy Tarreau4a129812012-04-25 17:31:42 +02001344/* fetch the connection's source IPv4/IPv6 address */
Thierry FOURNIERa123ad82015-07-24 09:12:15 +02001345int smp_fetch_src(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001346{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001347 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001348
1349 if (!cli_conn)
1350 return 0;
1351
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001352 if (!conn_get_src(cli_conn))
1353 return 0;
1354
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001355 switch (cli_conn->src->ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001356 case AF_INET:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001357 smp->data.u.ipv4 = ((struct sockaddr_in *)cli_conn->src)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001358 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001359 break;
1360 case AF_INET6:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001361 smp->data.u.ipv6 = ((struct sockaddr_in6 *)cli_conn->src)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001362 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001363 break;
1364 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001365 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001366 }
Emeric Brunf769f512010-10-22 17:14:01 +02001367
Willy Tarreau37406352012-04-23 16:16:37 +02001368 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001369 return 1;
1370}
1371
Willy Tarreaua5e37562011-12-16 17:06:15 +01001372/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001373static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001374smp_fetch_sport(const struct arg *args, struct sample *smp, const char *k, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001375{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001376 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001377
1378 if (!cli_conn)
1379 return 0;
1380
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001381 if (!conn_get_src(cli_conn))
1382 return 0;
1383
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001384 smp->data.type = SMP_T_SINT;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001385 if (!(smp->data.u.sint = get_host_port(cli_conn->src)))
Emeric Brunf769f512010-10-22 17:14:01 +02001386 return 0;
1387
Willy Tarreau37406352012-04-23 16:16:37 +02001388 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001389 return 1;
1390}
1391
Willy Tarreau4a129812012-04-25 17:31:42 +02001392/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001393static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001394smp_fetch_dst(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001395{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001396 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreau645513a2010-05-24 20:55:15 +02001397
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001398 if (!cli_conn)
1399 return 0;
1400
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001401 if (!conn_get_dst(cli_conn))
1402 return 0;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001403
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001404 switch (cli_conn->dst->ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001405 case AF_INET:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001406 smp->data.u.ipv4 = ((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001407 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001408 break;
1409 case AF_INET6:
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001410 smp->data.u.ipv6 = ((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001411 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001412 break;
1413 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001414 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001415 }
Emeric Brunf769f512010-10-22 17:14:01 +02001416
Willy Tarreau37406352012-04-23 16:16:37 +02001417 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001418 return 1;
1419}
1420
Willy Tarreau16e01562016-08-09 16:46:18 +02001421/* check if the destination address of the front connection is local to the
1422 * system or if it was intercepted.
1423 */
1424int smp_fetch_dst_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1425{
1426 struct connection *conn = objt_conn(smp->sess->origin);
1427 struct listener *li = smp->sess->listener;
1428
1429 if (!conn)
1430 return 0;
1431
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001432 if (!conn_get_dst(conn))
Willy Tarreau16e01562016-08-09 16:46:18 +02001433 return 0;
1434
1435 smp->data.type = SMP_T_BOOL;
1436 smp->flags = 0;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001437 smp->data.u.sint = addr_is_local(li->netns, conn->dst);
Willy Tarreau16e01562016-08-09 16:46:18 +02001438 return smp->data.u.sint >= 0;
1439}
1440
1441/* check if the source address of the front connection is local to the system
1442 * or not.
1443 */
1444int smp_fetch_src_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1445{
1446 struct connection *conn = objt_conn(smp->sess->origin);
1447 struct listener *li = smp->sess->listener;
1448
1449 if (!conn)
1450 return 0;
1451
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001452 if (!conn_get_src(conn))
Willy Tarreau16e01562016-08-09 16:46:18 +02001453 return 0;
1454
1455 smp->data.type = SMP_T_BOOL;
1456 smp->flags = 0;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001457 smp->data.u.sint = addr_is_local(li->netns, conn->src);
Willy Tarreau16e01562016-08-09 16:46:18 +02001458 return smp->data.u.sint >= 0;
1459}
1460
Willy Tarreaua5e37562011-12-16 17:06:15 +01001461/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001462static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001463smp_fetch_dport(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001464{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001465 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001466
1467 if (!cli_conn)
1468 return 0;
1469
Willy Tarreaudddd2b42019-07-17 11:37:29 +02001470 if (!conn_get_dst(cli_conn))
1471 return 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001472
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001473 smp->data.type = SMP_T_SINT;
Willy Tarreau7bbc4a52019-07-17 15:41:35 +02001474 if (!(smp->data.u.sint = get_host_port(cli_conn->dst)))
Emeric Brunf769f512010-10-22 17:14:01 +02001475 return 0;
1476
Willy Tarreau37406352012-04-23 16:16:37 +02001477 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001478 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01001479}
1480
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001481#ifdef TCP_INFO
1482
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001483
1484/* Validates the arguments passed to "fc_*" fetch keywords returning a time
1485 * value. These keywords support an optional string representing the unit of the
1486 * result: "us" for microseconds and "ms" for milliseconds". Returns 0 on error
1487 * and non-zero if OK.
1488 */
1489static int val_fc_time_value(struct arg *args, char **err)
1490{
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001491 if (args[0].type == ARGT_STR) {
1492 if (strcmp(args[0].data.str.area, "us") == 0) {
1493 free(args[0].data.str.area);
1494 args[0].type = ARGT_SINT;
1495 args[0].data.sint = TIME_UNIT_US;
1496 }
1497 else if (strcmp(args[0].data.str.area, "ms") == 0) {
1498 free(args[0].data.str.area);
1499 args[0].type = ARGT_SINT;
1500 args[0].data.sint = TIME_UNIT_MS;
1501 }
1502 else {
1503 memprintf(err, "expects 'us' or 'ms', got '%s'",
1504 args[0].data.str.area);
1505 return 0;
1506 }
1507 }
1508 else {
1509 memprintf(err, "Unexpected arg type");
1510 return 0;
1511 }
1512
1513 return 1;
1514}
1515
1516/* Validates the arguments passed to "fc_*" fetch keywords returning a
1517 * counter. These keywords should be used without any keyword, but because of a
1518 * bug in previous versions, an optional string argument may be passed. In such
1519 * case, the argument is ignored and a warning is emitted. Returns 0 on error
1520 * and non-zero if OK.
1521 */
1522static int var_fc_counter(struct arg *args, char **err)
1523{
1524 if (args[0].type != ARGT_STOP) {
1525 ha_warning("no argument supported for 'fc_*' sample expressions returning counters.\n");
1526 if (args[0].type == ARGT_STR)
1527 free(args[0].data.str.area);
1528 args[0].type = ARGT_STOP;
1529 }
1530
1531 return 1;
1532}
1533
Joseph Herlanta6331472018-11-25 12:59:12 -08001534/* Returns some tcp_info data if it's available. "dir" must be set to 0 if
1535 * the client connection is required, otherwise it is set to 1. "val" represents
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001536 * the required value.
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001537 * If the function fails it returns 0, otherwise it returns 1 and "result" is filled.
1538 */
1539static inline int get_tcp_info(const struct arg *args, struct sample *smp,
1540 int dir, int val)
1541{
1542 struct connection *conn;
1543 struct tcp_info info;
1544 socklen_t optlen;
1545
1546 /* strm can be null. */
1547 if (!smp->strm)
1548 return 0;
1549
1550 /* get the object associated with the stream interface.The
1551 * object can be other thing than a connection. For example,
1552 * it be a appctx. */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001553 conn = cs_conn(objt_cs(smp->strm->si[dir].end));
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001554 if (!conn)
1555 return 0;
1556
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001557 /* The fd may not be available for the tcp_info struct, and the
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001558 syscal can fail. */
1559 optlen = sizeof(info);
Willy Tarreau585744b2017-08-24 14:31:19 +02001560 if (getsockopt(conn->handle.fd, SOL_TCP, TCP_INFO, &info, &optlen) == -1)
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001561 return 0;
1562
1563 /* extract the value. */
1564 smp->data.type = SMP_T_SINT;
1565 switch (val) {
Joe Williams30fcd392016-08-10 07:06:44 -07001566 case 0: smp->data.u.sint = info.tcpi_rtt; break;
1567 case 1: smp->data.u.sint = info.tcpi_rttvar; break;
1568#if defined(__linux__)
1569 /* these ones are common to all Linux versions */
1570 case 2: smp->data.u.sint = info.tcpi_unacked; break;
1571 case 3: smp->data.u.sint = info.tcpi_sacked; break;
1572 case 4: smp->data.u.sint = info.tcpi_lost; break;
1573 case 5: smp->data.u.sint = info.tcpi_retrans; break;
1574 case 6: smp->data.u.sint = info.tcpi_fackets; break;
1575 case 7: smp->data.u.sint = info.tcpi_reordering; break;
1576#elif defined(__FreeBSD__) || defined(__NetBSD__)
1577 /* the ones are found on FreeBSD and NetBSD featuring TCP_INFO */
1578 case 2: smp->data.u.sint = info.__tcpi_unacked; break;
1579 case 3: smp->data.u.sint = info.__tcpi_sacked; break;
1580 case 4: smp->data.u.sint = info.__tcpi_lost; break;
1581 case 5: smp->data.u.sint = info.__tcpi_retrans; break;
1582 case 6: smp->data.u.sint = info.__tcpi_fackets; break;
1583 case 7: smp->data.u.sint = info.__tcpi_reordering; break;
1584#endif
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001585 default: return 0;
1586 }
1587
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001588 return 1;
1589}
1590
1591/* get the mean rtt of a client connexion */
1592static int
1593smp_fetch_fc_rtt(const struct arg *args, struct sample *smp, const char *kw, void *private)
1594{
1595 if (!get_tcp_info(args, smp, 0, 0))
1596 return 0;
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001597
1598 /* By default or if explicitly specified, convert rtt to ms */
1599 if (!args || args[0].type == ARGT_STOP || args[0].data.sint == TIME_UNIT_MS)
1600 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1601
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001602 return 1;
1603}
1604
1605/* get the variance of the mean rtt of a client connexion */
1606static int
1607smp_fetch_fc_rttvar(const struct arg *args, struct sample *smp, const char *kw, void *private)
1608{
1609 if (!get_tcp_info(args, smp, 0, 1))
1610 return 0;
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001611
1612 /* By default or if explicitly specified, convert rttvar to ms */
1613 if (!args || args[0].type == ARGT_STOP || args[0].data.sint == TIME_UNIT_MS)
1614 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1615
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001616 return 1;
1617}
Joe Williams30fcd392016-08-10 07:06:44 -07001618
1619#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1620
1621/* get the unacked counter on a client connexion */
1622static int
1623smp_fetch_fc_unacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1624{
1625 if (!get_tcp_info(args, smp, 0, 2))
1626 return 0;
1627 return 1;
1628}
1629
1630/* get the sacked counter on a client connexion */
1631static int
1632smp_fetch_fc_sacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1633{
1634 if (!get_tcp_info(args, smp, 0, 3))
1635 return 0;
1636 return 1;
1637}
1638
1639/* get the lost counter on a client connexion */
1640static int
1641smp_fetch_fc_lost(const struct arg *args, struct sample *smp, const char *kw, void *private)
1642{
1643 if (!get_tcp_info(args, smp, 0, 4))
1644 return 0;
1645 return 1;
1646}
1647
1648/* get the retrans counter on a client connexion */
1649static int
1650smp_fetch_fc_retrans(const struct arg *args, struct sample *smp, const char *kw, void *private)
1651{
1652 if (!get_tcp_info(args, smp, 0, 5))
1653 return 0;
1654 return 1;
1655}
1656
1657/* get the fackets counter on a client connexion */
1658static int
1659smp_fetch_fc_fackets(const struct arg *args, struct sample *smp, const char *kw, void *private)
1660{
1661 if (!get_tcp_info(args, smp, 0, 6))
1662 return 0;
1663 return 1;
1664}
1665
1666/* get the reordering counter on a client connexion */
1667static int
1668smp_fetch_fc_reordering(const struct arg *args, struct sample *smp, const char *kw, void *private)
1669{
1670 if (!get_tcp_info(args, smp, 0, 7))
1671 return 0;
1672 return 1;
1673}
1674#endif // linux || freebsd || netbsd
1675#endif // TCP_INFO
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001676
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001677#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001678/* parse the "v4v6" bind keyword */
1679static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1680{
1681 struct listener *l;
1682
1683 list_for_each_entry(l, &conf->listeners, by_bind) {
1684 if (l->addr.ss_family == AF_INET6)
1685 l->options |= LI_O_V4V6;
1686 }
1687
1688 return 0;
1689}
1690
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001691/* parse the "v6only" bind keyword */
1692static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1693{
1694 struct listener *l;
1695
1696 list_for_each_entry(l, &conf->listeners, by_bind) {
1697 if (l->addr.ss_family == AF_INET6)
1698 l->options |= LI_O_V6ONLY;
1699 }
1700
1701 return 0;
1702}
1703#endif
1704
Pieter Baauwd551fb52013-05-08 22:49:23 +02001705#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001706/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001707static 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 +02001708{
1709 struct listener *l;
1710
Willy Tarreau4348fad2012-09-20 16:48:07 +02001711 list_for_each_entry(l, &conf->listeners, by_bind) {
1712 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1713 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02001714 }
1715
Willy Tarreau44791242012-09-12 23:27:21 +02001716 return 0;
1717}
1718#endif
1719
1720#ifdef TCP_DEFER_ACCEPT
1721/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001722static 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 +02001723{
1724 struct listener *l;
1725
Willy Tarreau4348fad2012-09-20 16:48:07 +02001726 list_for_each_entry(l, &conf->listeners, by_bind) {
1727 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1728 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02001729 }
1730
Willy Tarreau44791242012-09-12 23:27:21 +02001731 return 0;
1732}
1733#endif
1734
Willy Tarreau1c862c52012-10-05 16:21:00 +02001735#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01001736/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02001737static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1738{
1739 struct listener *l;
1740
1741 list_for_each_entry(l, &conf->listeners, by_bind) {
1742 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1743 l->options |= LI_O_TCP_FO;
1744 }
1745
1746 return 0;
1747}
1748#endif
1749
Willy Tarreau44791242012-09-12 23:27:21 +02001750#ifdef TCP_MAXSEG
1751/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001752static 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 +02001753{
1754 struct listener *l;
1755 int mss;
1756
Willy Tarreau44791242012-09-12 23:27:21 +02001757 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001758 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001759 return ERR_ALERT | ERR_FATAL;
1760 }
1761
1762 mss = atoi(args[cur_arg + 1]);
1763 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001764 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001765 return ERR_ALERT | ERR_FATAL;
1766 }
1767
Willy Tarreau4348fad2012-09-20 16:48:07 +02001768 list_for_each_entry(l, &conf->listeners, by_bind) {
1769 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1770 l->maxseg = mss;
1771 }
Willy Tarreau44791242012-09-12 23:27:21 +02001772
1773 return 0;
1774}
1775#endif
1776
Willy Tarreau2af207a2015-02-04 00:45:58 +01001777#ifdef TCP_USER_TIMEOUT
1778/* parse the "tcp-ut" bind keyword */
1779static int bind_parse_tcp_ut(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1780{
1781 const char *ptr = NULL;
1782 struct listener *l;
1783 unsigned int timeout;
1784
1785 if (!*args[cur_arg + 1]) {
1786 memprintf(err, "'%s' : missing TCP User Timeout value", args[cur_arg]);
1787 return ERR_ALERT | ERR_FATAL;
1788 }
1789
1790 ptr = parse_time_err(args[cur_arg + 1], &timeout, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +02001791 if (ptr == PARSE_TIME_OVER) {
1792 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
1793 args[cur_arg+1], args[cur_arg]);
1794 return ERR_ALERT | ERR_FATAL;
1795 }
1796 else if (ptr == PARSE_TIME_UNDER) {
1797 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
1798 args[cur_arg+1], args[cur_arg]);
1799 return ERR_ALERT | ERR_FATAL;
1800 }
1801 else if (ptr) {
Willy Tarreau2af207a2015-02-04 00:45:58 +01001802 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[cur_arg]);
1803 return ERR_ALERT | ERR_FATAL;
1804 }
1805
1806 list_for_each_entry(l, &conf->listeners, by_bind) {
1807 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1808 l->tcp_ut = timeout;
1809 }
1810
1811 return 0;
1812}
1813#endif
1814
Willy Tarreau44791242012-09-12 23:27:21 +02001815#ifdef SO_BINDTODEVICE
Willy Tarreau2af207a2015-02-04 00:45:58 +01001816/* parse the "interface" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001817static 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 +02001818{
1819 struct listener *l;
1820
Willy Tarreau44791242012-09-12 23:27:21 +02001821 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001822 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001823 return ERR_ALERT | ERR_FATAL;
1824 }
1825
Willy Tarreau4348fad2012-09-20 16:48:07 +02001826 list_for_each_entry(l, &conf->listeners, by_bind) {
1827 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1828 l->interface = strdup(args[cur_arg + 1]);
1829 }
Willy Tarreau44791242012-09-12 23:27:21 +02001830
Willy Tarreau44791242012-09-12 23:27:21 +02001831 return 0;
1832}
1833#endif
1834
Willy Tarreaue5733232019-05-22 19:24:06 +02001835#ifdef USE_NS
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001836/* parse the "namespace" bind keyword */
1837static int bind_parse_namespace(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1838{
1839 struct listener *l;
1840 char *namespace = NULL;
1841
1842 if (!*args[cur_arg + 1]) {
1843 memprintf(err, "'%s' : missing namespace id", args[cur_arg]);
1844 return ERR_ALERT | ERR_FATAL;
1845 }
1846 namespace = args[cur_arg + 1];
1847
1848 list_for_each_entry(l, &conf->listeners, by_bind) {
1849 l->netns = netns_store_lookup(namespace, strlen(namespace));
1850
1851 if (l->netns == NULL)
1852 l->netns = netns_store_insert(namespace);
1853
1854 if (l->netns == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001855 ha_alert("Cannot open namespace '%s'.\n", args[cur_arg + 1]);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001856 return ERR_ALERT | ERR_FATAL;
1857 }
1858 }
1859 return 0;
1860}
1861#endif
1862
Willy Tarreau163d4622015-10-13 16:16:41 +02001863#ifdef TCP_USER_TIMEOUT
1864/* parse the "tcp-ut" server keyword */
1865static int srv_parse_tcp_ut(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1866{
1867 const char *ptr = NULL;
1868 unsigned int timeout;
1869
1870 if (!*args[*cur_arg + 1]) {
1871 memprintf(err, "'%s' : missing TCP User Timeout value", args[*cur_arg]);
1872 return ERR_ALERT | ERR_FATAL;
1873 }
1874
1875 ptr = parse_time_err(args[*cur_arg + 1], &timeout, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +02001876 if (ptr == PARSE_TIME_OVER) {
1877 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
1878 args[*cur_arg+1], args[*cur_arg]);
1879 return ERR_ALERT | ERR_FATAL;
1880 }
1881 else if (ptr == PARSE_TIME_UNDER) {
1882 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
1883 args[*cur_arg+1], args[*cur_arg]);
1884 return ERR_ALERT | ERR_FATAL;
1885 }
1886 else if (ptr) {
Willy Tarreau163d4622015-10-13 16:16:41 +02001887 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[*cur_arg]);
1888 return ERR_ALERT | ERR_FATAL;
1889 }
1890
1891 if (newsrv->addr.ss_family == AF_INET || newsrv->addr.ss_family == AF_INET6)
1892 newsrv->tcp_ut = timeout;
1893
1894 return 0;
1895}
1896#endif
1897
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001898
Willy Tarreau4a129812012-04-25 17:31:42 +02001899/* Note: must not be declared <const> as its list will be overwritten.
1900 * Note: fetches that may return multiple types must be declared as the lowest
1901 * common denominator, the type that can be casted into all other ones. For
1902 * instance v4/v6 must be declared v4.
1903 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02001904static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001905 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001906 { "dst_is_local", smp_fetch_dst_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001907 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001908 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001909 { "src_is_local", smp_fetch_src_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001910 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001911#ifdef TCP_INFO
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001912 { "fc_rtt", smp_fetch_fc_rtt, ARG1(0,STR), val_fc_time_value, SMP_T_SINT, SMP_USE_L4CLI },
1913 { "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 -07001914#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
Christopher Fauletba0c53e2019-10-17 14:40:48 +02001915 { "fc_unacked", smp_fetch_fc_unacked, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1916 { "fc_sacked", smp_fetch_fc_sacked, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1917 { "fc_retrans", smp_fetch_fc_retrans, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1918 { "fc_fackets", smp_fetch_fc_fackets, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1919 { "fc_lost", smp_fetch_fc_lost, ARG1(0,STR), var_fc_counter, SMP_T_SINT, SMP_USE_L4CLI },
1920 { "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 -07001921#endif // linux || freebsd || netbsd
1922#endif // TCP_INFO
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001923 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02001924}};
1925
Willy Tarreau0108d902018-11-25 19:14:37 +01001926INITCALL1(STG_REGISTER, sample_register_fetches, &sample_fetch_keywords);
1927
Willy Tarreau44791242012-09-12 23:27:21 +02001928/************************************************************************/
1929/* All supported bind keywords must be declared here. */
1930/************************************************************************/
1931
1932/* Note: must not be declared <const> as its list will be overwritten.
1933 * Please take care of keeping this list alphabetically sorted, doing so helps
1934 * all code contributors.
1935 * Optional keywords are also declared with a NULL ->parse() function so that
1936 * the config parser can report an appropriate error when a known keyword was
1937 * not enabled.
1938 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02001939static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02001940#ifdef TCP_DEFER_ACCEPT
1941 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
1942#endif
1943#ifdef SO_BINDTODEVICE
1944 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
1945#endif
1946#ifdef TCP_MAXSEG
1947 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
1948#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01001949#ifdef TCP_USER_TIMEOUT
1950 { "tcp-ut", bind_parse_tcp_ut, 1 }, /* set User Timeout on listening socket */
1951#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001952#ifdef TCP_FASTOPEN
1953 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
1954#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02001955#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001956 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
1957#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001958#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001959 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001960 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
1961#endif
Willy Tarreaue5733232019-05-22 19:24:06 +02001962#ifdef USE_NS
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001963 { "namespace", bind_parse_namespace, 1 },
1964#endif
Willy Tarreau44791242012-09-12 23:27:21 +02001965 /* the versions with the NULL parse function*/
1966 { "defer-accept", NULL, 0 },
1967 { "interface", NULL, 1 },
1968 { "mss", NULL, 1 },
1969 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01001970 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001971 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02001972 { NULL, NULL, 0 },
1973}};
1974
Willy Tarreau0108d902018-11-25 19:14:37 +01001975INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws);
1976
Willy Tarreau163d4622015-10-13 16:16:41 +02001977static struct srv_kw_list srv_kws = { "TCP", { }, {
1978#ifdef TCP_USER_TIMEOUT
Frédéric Lécaille5c3cd972017-03-15 16:36:09 +01001979 { "tcp-ut", srv_parse_tcp_ut, 1, 1 }, /* set TCP user timeout on server */
Willy Tarreau163d4622015-10-13 16:16:41 +02001980#endif
1981 { NULL, NULL, 0 },
1982}};
Willy Tarreau2d392c22015-08-24 01:43:45 +02001983
Willy Tarreau0108d902018-11-25 19:14:37 +01001984INITCALL1(STG_REGISTER, srv_register_keywords, &srv_kws);
1985
Willy Tarreau2d392c22015-08-24 01:43:45 +02001986static struct action_kw_list tcp_req_conn_actions = {ILH, {
William Lallemand13e9b0c2016-05-25 02:34:07 +02001987 { "set-src", tcp_parse_set_src_dst },
1988 { "set-src-port", tcp_parse_set_src_dst },
1989 { "set-dst" , tcp_parse_set_src_dst },
1990 { "set-dst-port", tcp_parse_set_src_dst },
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02001991 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau2d392c22015-08-24 01:43:45 +02001992 { /* END */ }
1993}};
1994
Willy Tarreau0108d902018-11-25 19:14:37 +01001995INITCALL1(STG_REGISTER, tcp_req_conn_keywords_register, &tcp_req_conn_actions);
1996
Willy Tarreau620408f2016-10-21 16:37:51 +02001997static struct action_kw_list tcp_req_sess_actions = {ILH, {
Willy Tarreau620408f2016-10-21 16:37:51 +02001998 { "set-src", tcp_parse_set_src_dst },
1999 { "set-src-port", tcp_parse_set_src_dst },
2000 { "set-dst" , tcp_parse_set_src_dst },
2001 { "set-dst-port", tcp_parse_set_src_dst },
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002002 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau620408f2016-10-21 16:37:51 +02002003 { /* END */ }
2004}};
2005
Willy Tarreau0108d902018-11-25 19:14:37 +01002006INITCALL1(STG_REGISTER, tcp_req_sess_keywords_register, &tcp_req_sess_actions);
2007
Willy Tarreau2d392c22015-08-24 01:43:45 +02002008static struct action_kw_list tcp_req_cont_actions = {ILH, {
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002009 { "set-dst" , tcp_parse_set_src_dst },
2010 { "set-dst-port", tcp_parse_set_src_dst },
2011 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002012 { /* END */ }
2013}};
2014
Willy Tarreau0108d902018-11-25 19:14:37 +01002015INITCALL1(STG_REGISTER, tcp_req_cont_keywords_register, &tcp_req_cont_actions);
2016
Willy Tarreau2d392c22015-08-24 01:43:45 +02002017static struct action_kw_list tcp_res_cont_actions = {ILH, {
2018 { "silent-drop", tcp_parse_silent_drop },
2019 { /* END */ }
2020}};
2021
Willy Tarreau0108d902018-11-25 19:14:37 +01002022INITCALL1(STG_REGISTER, tcp_res_cont_keywords_register, &tcp_res_cont_actions);
2023
Willy Tarreau2d392c22015-08-24 01:43:45 +02002024static struct action_kw_list http_req_actions = {ILH, {
William Lallemand2e785f22016-05-25 01:48:42 +02002025 { "silent-drop", tcp_parse_silent_drop },
William Lallemand13e9b0c2016-05-25 02:34:07 +02002026 { "set-src", tcp_parse_set_src_dst },
2027 { "set-src-port", tcp_parse_set_src_dst },
2028 { "set-dst", tcp_parse_set_src_dst },
2029 { "set-dst-port", tcp_parse_set_src_dst },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002030 { /* END */ }
2031}};
2032
Willy Tarreau0108d902018-11-25 19:14:37 +01002033INITCALL1(STG_REGISTER, http_req_keywords_register, &http_req_actions);
2034
Willy Tarreau2d392c22015-08-24 01:43:45 +02002035static struct action_kw_list http_res_actions = {ILH, {
2036 { "silent-drop", tcp_parse_silent_drop },
2037 { /* END */ }
2038}};
2039
Willy Tarreau0108d902018-11-25 19:14:37 +01002040INITCALL1(STG_REGISTER, http_res_keywords_register, &http_res_actions);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002041
Willy Tarreau80713382018-11-26 10:19:54 +01002042REGISTER_BUILD_OPTS("Built with transparent proxy support using:"
Willy Tarreauba962912016-12-21 18:55:02 +01002043#if defined(IP_TRANSPARENT)
Willy Tarreau80713382018-11-26 10:19:54 +01002044 " IP_TRANSPARENT"
Willy Tarreauba962912016-12-21 18:55:02 +01002045#endif
2046#if defined(IPV6_TRANSPARENT)
Willy Tarreau80713382018-11-26 10:19:54 +01002047 " IPV6_TRANSPARENT"
Willy Tarreauba962912016-12-21 18:55:02 +01002048#endif
2049#if defined(IP_FREEBIND)
Willy Tarreau80713382018-11-26 10:19:54 +01002050 " IP_FREEBIND"
Willy Tarreauba962912016-12-21 18:55:02 +01002051#endif
2052#if defined(IP_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002053 " IP_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002054#endif
2055#if defined(IPV6_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002056 " IPV6_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002057#endif
2058#if defined(SO_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002059 " SO_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002060#endif
Willy Tarreau80713382018-11-26 10:19:54 +01002061 "");
Willy Tarreaue6b98942007-10-29 01:09:36 +01002062
2063
2064/*
2065 * Local variables:
2066 * c-indent-level: 8
2067 * c-basic-offset: 8
2068 * End:
2069 */