blob: f59502932dd1806d68bfd8419f4f0a1ff43c71bc [file] [log] [blame]
Willy Tarreaue6b98942007-10-29 01:09:36 +01001/*
2 * AF_INET/AF_INET6 SOCK_STREAM protocol layer (tcp)
3 *
Willy Tarreaud4c33c82013-01-07 21:59:07 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaue6b98942007-10-29 01:09:36 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
Baptiste Assmann39a5f222016-08-08 14:12:08 +020013/* this is to have tcp_info defined on systems using musl
14 * library, such as Alpine Linux
15 */
16#define _GNU_SOURCE
17
Willy Tarreaue6b98942007-10-29 01:09:36 +010018#include <ctype.h>
19#include <errno.h>
20#include <fcntl.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <time.h>
25
26#include <sys/param.h>
27#include <sys/socket.h>
28#include <sys/stat.h>
29#include <sys/types.h>
30#include <sys/un.h>
31
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040032#include <netinet/tcp.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020033#include <netinet/in.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040034
Willy Tarreaue6b98942007-10-29 01:09:36 +010035#include <common/compat.h>
36#include <common/config.h>
37#include <common/debug.h>
38#include <common/errors.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010039#include <common/initcall.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010040#include <common/mini-clist.h>
41#include <common/standard.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010042#include <common/namespace.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010043
Willy Tarreau39713102016-11-25 15:49:32 +010044#include <types/action.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020045#include <types/connection.h>
Willy Tarreau39713102016-11-25 15:49:32 +010046#include <types/global.h>
47#include <types/stream.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010048
Willy Tarreau9fcb9842012-04-20 14:45:49 +020049#include <proto/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020050#include <proto/channel.h>
Willy Tarreaud2274c62012-07-06 14:29:45 +020051#include <proto/connection.h>
Willy Tarreaudd2f85e2012-09-02 22:34:23 +020052#include <proto/fd.h>
Willy Tarreau61c112a2018-10-02 16:43:32 +020053#include <proto/http_rules.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020054#include <proto/listener.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020055#include <proto/log.h>
56#include <proto/port_range.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020057#include <proto/protocol.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020058#include <proto/proto_http.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010059#include <proto/proto_tcp.h>
Willy Tarreaub6866442008-07-14 23:54:42 +020060#include <proto/proxy.h>
Willy Tarreaucd3b0942012-04-27 21:52:18 +020061#include <proto/sample.h>
Willy Tarreau163d4622015-10-13 16:16:41 +020062#include <proto/server.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020063#include <proto/task.h>
Willy Tarreau39713102016-11-25 15:49:32 +010064#include <proto/tcp_rules.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010065
Emeric Bruncf20bf12010-10-22 16:06:11 +020066static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
67static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020068static void tcpv4_add_listener(struct listener *listener, int port);
69static void tcpv6_add_listener(struct listener *listener, int port);
Willy Tarreaue6b98942007-10-29 01:09:36 +010070
71/* Note: must not be declared <const> as its list will be overwritten */
72static struct protocol proto_tcpv4 = {
73 .name = "tcpv4",
74 .sock_domain = AF_INET,
75 .sock_type = SOCK_STREAM,
76 .sock_prot = IPPROTO_TCP,
77 .sock_family = AF_INET,
78 .sock_addrlen = sizeof(struct sockaddr_in),
79 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020080 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020081 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020082 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010083 .bind_all = tcp_bind_listeners,
84 .unbind_all = unbind_all_listeners,
85 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020086 .get_src = tcp_get_src,
87 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +020088 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020089 .add = tcpv4_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010090 .listeners = LIST_HEAD_INIT(proto_tcpv4.listeners),
91 .nb_listeners = 0,
92};
93
Willy Tarreau0108d902018-11-25 19:14:37 +010094INITCALL1(STG_REGISTER, protocol_register, &proto_tcpv4);
95
Willy Tarreaue6b98942007-10-29 01:09:36 +010096/* Note: must not be declared <const> as its list will be overwritten */
97static struct protocol proto_tcpv6 = {
98 .name = "tcpv6",
99 .sock_domain = AF_INET6,
100 .sock_type = SOCK_STREAM,
101 .sock_prot = IPPROTO_TCP,
102 .sock_family = AF_INET6,
103 .sock_addrlen = sizeof(struct sockaddr_in6),
104 .l3_addrlen = 128/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +0200105 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +0200106 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +0200107 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100108 .bind_all = tcp_bind_listeners,
109 .unbind_all = unbind_all_listeners,
110 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +0200111 .get_src = tcp_get_src,
112 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +0200113 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +0200114 .add = tcpv6_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100115 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
116 .nb_listeners = 0,
117};
118
Willy Tarreau0108d902018-11-25 19:14:37 +0100119INITCALL1(STG_REGISTER, protocol_register, &proto_tcpv6);
120
Olivier Houchard153659f2017-04-05 22:39:56 +0200121/* Default TCP parameters, got by opening a temporary TCP socket. */
122#ifdef TCP_MAXSEG
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100123static THREAD_LOCAL int default_tcp_maxseg = -1;
124static THREAD_LOCAL int default_tcp6_maxseg = -1;
Olivier Houchard153659f2017-04-05 22:39:56 +0200125#endif
126
David du Colombier6f5ccb12011-03-10 22:26:24 +0100127/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100128 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
129 * - 0 : ignore remote address (may even be a NULL pointer)
130 * - 1 : use provided address
131 * - 2 : use provided port
132 * - 3 : use both
133 *
134 * The function supports multiple foreign binding methods :
135 * - linux_tproxy: we directly bind to the foreign address
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100136 * The second one can be used as a fallback for the first one.
137 * This function returns 0 when everything's OK, 1 if it could not bind, to the
138 * local address, 2 if it could not bind to the foreign address.
139 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100140int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100141{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100142 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100143 int foreign_ok = 0;
144 int ret;
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100145 static THREAD_LOCAL int ip_transp_working = 1;
146 static THREAD_LOCAL int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200147
David du Colombier65c17962012-07-13 14:34:59 +0200148 switch (local->ss_family) {
149 case AF_INET:
150 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200151 /* This deserves some explanation. Some platforms will support
152 * multiple combinations of certain methods, so we try the
153 * supported ones until one succeeds.
154 */
155 if (0
156#if defined(IP_TRANSPARENT)
157 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
158#endif
159#if defined(IP_FREEBIND)
160 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
161#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200162#if defined(IP_BINDANY)
163 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
164#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200165#if defined(SO_BINDANY)
166 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
167#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200168 )
David du Colombier65c17962012-07-13 14:34:59 +0200169 foreign_ok = 1;
170 else
171 ip_transp_working = 0;
172 }
173 break;
174 case AF_INET6:
175 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200176 if (0
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200177#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200178 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
179#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100180#if defined(IP_FREEBIND)
181 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
182#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200183#if defined(IPV6_BINDANY)
184 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
185#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200186#if defined(SO_BINDANY)
187 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
188#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200189 )
David du Colombier65c17962012-07-13 14:34:59 +0200190 foreign_ok = 1;
191 else
192 ip6_transp_working = 0;
193 }
194 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100195 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200196
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100197 if (flags) {
198 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200199 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100200 switch (remote->ss_family) {
201 case AF_INET:
202 if (flags & 1)
203 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
204 if (flags & 2)
205 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
206 break;
207 case AF_INET6:
208 if (flags & 1)
209 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
210 if (flags & 2)
211 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
212 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100213 default:
214 /* we don't want to try to bind to an unknown address family */
215 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100216 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100217 }
218
Simon Hormande072bd2011-06-24 15:11:37 +0900219 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100220 if (foreign_ok) {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200221 if (is_inet_addr(&bind_addr)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200222 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
223 if (ret < 0)
224 return 2;
225 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100226 }
227 else {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200228 if (is_inet_addr(local)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200229 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
230 if (ret < 0)
231 return 1;
232 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100233 }
234
235 if (!flags)
236 return 0;
237
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100238 if (!foreign_ok)
239 /* we could not bind to a foreign address */
240 return 2;
241
242 return 0;
243}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100244
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100245static int create_server_socket(struct connection *conn)
246{
Willy Tarreau529c1392014-12-24 13:47:55 +0100247 const struct netns_entry *ns = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100248
Willy Tarreaue5733232019-05-22 19:24:06 +0200249#ifdef USE_NS
Willy Tarreau529c1392014-12-24 13:47:55 +0100250 if (objt_server(conn->target)) {
251 if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
252 ns = conn->proxy_netns;
253 else
254 ns = __objt_server(conn->target)->netns;
255 }
256#endif
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100257 return my_socketat(ns, conn->addr.to.ss_family, SOCK_STREAM, IPPROTO_TCP);
258}
Willy Tarreau9650f372009-08-16 14:02:45 +0200259
260/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200261 * This function initiates a TCP connection establishment to the target assigned
262 * to connection <conn> using (si->{target,addr.to}). A source address may be
263 * pointed to by conn->addr.from in case of transparent proxying. Normal source
264 * bind addresses are still determined locally (due to the possible need of a
265 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100266 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100267 * supported. The <data> parameter is a boolean indicating whether there are data
268 * waiting for being sent or not, in order to adjust data write polling and on
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200269 * some platforms, the ability to avoid an empty initial ACK. The <flags> argument
270 * allows the caller to force using a delayed ACK when establishing the connection
Willy Tarreauf0837b22012-11-24 10:24:27 +0100271 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200272 * - CONNECT_DELACK_SMART_CONNECT = delayed ACK if backend has tcp-smart-connect, regardless of data
273 * - CONNECT_DELACK_ALWAYS = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200274 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200275 * Note that a pending send_proxy message accounts for data.
276 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200277 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +0200278 * - SF_ERR_NONE if everything's OK
279 * - SF_ERR_SRVTO if there are no more servers
280 * - SF_ERR_SRVCL if the connection was refused by the server
281 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
282 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
283 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +0100284 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100285 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200286 * The connection's fd is inserted only when SF_ERR_NONE is returned, otherwise
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100287 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200288 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100289
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200290int tcp_connect_server(struct connection *conn, int flags)
Willy Tarreau9650f372009-08-16 14:02:45 +0200291{
292 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100293 struct server *srv;
294 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100295 struct conn_src *src;
Willy Tarreau034c88c2017-01-23 23:36:45 +0100296 int use_fastopen = 0;
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 Tarreau585744b2017-08-24 14:31:19 +0200322 fd = conn->handle.fd = create_server_socket(conn);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100323
324 if (fd == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200325 qfprintf(stderr, "Cannot get a server socket.\n");
326
Willy Tarreau9ce70132014-01-24 16:08:19 +0100327 if (errno == ENFILE) {
328 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200329 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100330 "Proxy %s reached system FD limit (maxsock=%d). Please check system tunables.\n",
331 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100332 }
333 else if (errno == EMFILE) {
334 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200335 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100336 "Proxy %s reached process FD limit (maxsock=%d). Please check 'ulimit-n' and restart.\n",
337 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100338 }
339 else if (errno == ENOBUFS || errno == ENOMEM) {
340 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200341 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100342 "Proxy %s reached system memory limit (maxsock=%d). Please check system tunables.\n",
343 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100344 }
345 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
346 conn->err_code = CO_ER_NOPROTO;
347 }
348 else
349 conn->err_code = CO_ER_SOCK_ERR;
350
Willy Tarreau9650f372009-08-16 14:02:45 +0200351 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100352 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200353 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200354 }
355
356 if (fd >= global.maxsock) {
357 /* do not log anything there, it's a normal condition when this option
358 * is used to serialize connections to a server !
359 */
Christopher Faulet767a84b2017-11-24 16:50:31 +0100360 ha_alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
Willy Tarreau9650f372009-08-16 14:02:45 +0200361 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100362 conn->err_code = CO_ER_CONF_FDLIM;
363 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200364 return SF_ERR_PRXCOND; /* it is a configuration limit */
Willy Tarreau9650f372009-08-16 14:02:45 +0200365 }
366
367 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900368 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200369 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
370 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100371 conn->err_code = CO_ER_SOCK_ERR;
372 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200373 return SF_ERR_INTERNAL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200374 }
375
William Lallemandc03eb012018-11-27 12:02:37 +0100376 if (master == 1 && (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)) {
377 ha_alert("Cannot set CLOEXEC on client socket.\n");
378 close(fd);
379 conn->err_code = CO_ER_SOCK_ERR;
380 conn->flags |= CO_FL_ERROR;
381 return SF_ERR_INTERNAL;
382 }
383
Willy Tarreau9650f372009-08-16 14:02:45 +0200384 if (be->options & PR_O_TCP_SRV_KA)
Simon Hormande072bd2011-06-24 15:11:37 +0900385 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200386
Willy Tarreau9650f372009-08-16 14:02:45 +0200387 /* allow specific binding :
388 * - server-specific at first
389 * - proxy-specific next
390 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100391 if (srv && srv->conn_src.opts & CO_SRC_BIND)
392 src = &srv->conn_src;
393 else if (be->conn_src.opts & CO_SRC_BIND)
394 src = &be->conn_src;
395 else
396 src = NULL;
397
398 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200399 int ret, flags = 0;
400
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200401 if (is_inet_addr(&conn->addr.from)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100402 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100403 case CO_SRC_TPROXY_CLI:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200404 conn->flags |= CO_FL_PRIVATE;
405 /* fall through */
406 case CO_SRC_TPROXY_ADDR:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200407 flags = 3;
408 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100409 case CO_SRC_TPROXY_CIP:
410 case CO_SRC_TPROXY_DYN:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200411 conn->flags |= CO_FL_PRIVATE;
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200412 flags = 1;
413 break;
414 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200415 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200416
Willy Tarreau9650f372009-08-16 14:02:45 +0200417#ifdef SO_BINDTODEVICE
418 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100419 if (src->iface_name)
420 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200421#endif
422
Willy Tarreaua4380b42012-12-08 22:49:11 +0100423 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200424 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100425 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200426
427 ret = 1;
Vincent Bernat6e615892016-05-18 16:17:44 +0200428 memcpy(&sa, &src->source_addr, sizeof(sa));
Willy Tarreau9650f372009-08-16 14:02:45 +0200429
430 do {
431 /* note: in case of retry, we may have to release a previously
432 * allocated port, hence this loop's construct.
433 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200434 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
435 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200436
437 if (!attempts)
438 break;
439 attempts--;
440
Willy Tarreaua4380b42012-12-08 22:49:11 +0100441 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100442 if (!fdinfo[fd].local_port) {
443 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200444 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100445 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200446
Willy Tarreaua4380b42012-12-08 22:49:11 +0100447 fdinfo[fd].port_range = src->sport_range;
448 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200449
Willy Tarreaua4380b42012-12-08 22:49:11 +0100450 ret = tcp_bind_socket(fd, flags, &sa, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100451 if (ret != 0)
452 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200453 } while (ret != 0); /* binding NOK */
454 }
455 else {
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000456#ifdef IP_BIND_ADDRESS_NO_PORT
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100457 static THREAD_LOCAL int bind_address_no_port = 1;
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000458 setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
459#endif
Willy Tarreaua4380b42012-12-08 22:49:11 +0100460 ret = tcp_bind_socket(fd, flags, &src->source_addr, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100461 if (ret != 0)
462 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200463 }
464
Willy Tarreaua4380b42012-12-08 22:49:11 +0100465 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200466 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
467 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200468 close(fd);
469
Willy Tarreau9650f372009-08-16 14:02:45 +0200470 if (ret == 1) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100471 ha_alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
472 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200473 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100474 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200475 be->id);
476 } else {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100477 ha_alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
478 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200479 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100480 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200481 be->id);
482 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100483 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200484 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200485 }
486 }
487
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400488#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200489 /* disabling tcp quick ack now allows the first request to leave the
490 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100491 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200492 */
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200493 if (flags & (CONNECT_DELACK_ALWAYS) ||
494 ((flags & CONNECT_DELACK_SMART_CONNECT ||
495 (flags & CONNECT_HAS_DATA) || conn->send_proxy_ofs) &&
496 (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900497 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200498#endif
499
Willy Tarreau163d4622015-10-13 16:16:41 +0200500#ifdef TCP_USER_TIMEOUT
501 /* there is not much more we can do here when it fails, it's still minor */
502 if (srv && srv->tcp_ut)
503 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &srv->tcp_ut, sizeof(srv->tcp_ut));
504#endif
Willy Tarreau034c88c2017-01-23 23:36:45 +0100505
506 if (use_fastopen) {
507#if defined(TCP_FASTOPEN_CONNECT)
508 setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN_CONNECT, &one, sizeof(one));
509#endif
510 }
Willy Tarreaue803de22010-01-21 17:43:04 +0100511 if (global.tune.server_sndbuf)
512 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
513
514 if (global.tune.server_rcvbuf)
515 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
516
Willy Tarreau819efbf2017-01-25 14:12:22 +0100517 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) == -1) {
518 if (errno == EINPROGRESS || errno == EALREADY) {
519 /* common case, let's wait for connect status */
520 conn->flags |= CO_FL_WAIT_L4_CONN;
521 }
522 else if (errno == EISCONN) {
523 /* should normally not happen but if so, indicates that it's OK */
524 conn->flags &= ~CO_FL_WAIT_L4_CONN;
525 }
526 else if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200527 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100528 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200529 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100530 conn->err_code = CO_ER_FREE_PORTS;
531 }
532 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200533 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100534 conn->err_code = CO_ER_ADDR_INUSE;
535 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200536
Willy Tarreaub1719512012-12-08 23:03:28 +0100537 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200538 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
539 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200540 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100541 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100542 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200543 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200544 } else if (errno == ETIMEDOUT) {
545 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200546 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
547 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200548 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100549 conn->err_code = CO_ER_SOCK_ERR;
550 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200551 return SF_ERR_SRVTO;
Willy Tarreau9650f372009-08-16 14:02:45 +0200552 } else {
553 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
554 //qfprintf(stderr,"Connect(): %d", errno);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200555 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
556 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200557 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100558 conn->err_code = CO_ER_SOCK_ERR;
559 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200560 return SF_ERR_SRVCL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200561 }
562 }
Willy Tarreau819efbf2017-01-25 14:12:22 +0100563 else {
564 /* connect() == 0, this is great! */
565 conn->flags &= ~CO_FL_WAIT_L4_CONN;
566 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200567
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100568 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200569
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200570 /* Prepare to send a few handshakes related to the on-wire protocol. */
571 if (conn->send_proxy_ofs)
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200572 conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200573
Willy Tarreauf79c8172013-10-21 16:30:56 +0200574 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100575 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200576
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200577 if (conn_xprt_init(conn) < 0) {
Willy Tarreau3f2770b2017-10-05 18:01:29 +0200578 conn_full_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100579 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200580 return SF_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200581 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200582
Olivier Houchardc2aae742017-09-22 18:26:28 +0200583 if (conn->flags & (CO_FL_HANDSHAKE | CO_FL_WAIT_L4_CONN | CO_FL_EARLY_SSL_HS)) {
Willy Tarreau819efbf2017-01-25 14:12:22 +0100584 conn_sock_want_send(conn); /* for connect status, proxy protocol or SSL */
Olivier Houchardc2aae742017-09-22 18:26:28 +0200585 if (conn->flags & CO_FL_EARLY_SSL_HS)
586 conn_xprt_want_send(conn);
Willy Tarreau819efbf2017-01-25 14:12:22 +0100587 }
588 else {
589 /* If there's no more handshake, we need to notify the data
590 * layer when the connection is already OK otherwise we'll have
591 * no other opportunity to do it later (eg: health checks).
592 */
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200593 flags |= CONNECT_HAS_DATA;
Willy Tarreau819efbf2017-01-25 14:12:22 +0100594 }
595
Olivier Houchardfdcb0072019-05-06 18:32:29 +0200596 if (flags & CONNECT_HAS_DATA)
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200597 conn_xprt_want_send(conn); /* prepare to send data if any */
Willy Tarreau9650f372009-08-16 14:02:45 +0200598
Willy Tarreaue7dff022015-04-03 01:14:29 +0200599 return SF_ERR_NONE; /* connection is OK */
Willy Tarreau9650f372009-08-16 14:02:45 +0200600}
601
602
Willy Tarreau59b94792012-05-11 16:16:40 +0200603/*
604 * Retrieves the source address for the socket <fd>, with <dir> indicating
605 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
606 * success, -1 in case of error. The socket's source address is stored in
607 * <sa> for <salen> bytes.
608 */
609int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
610{
611 if (dir)
612 return getsockname(fd, sa, &salen);
613 else
614 return getpeername(fd, sa, &salen);
615}
616
617
618/*
619 * Retrieves the original destination address for the socket <fd>, with <dir>
620 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
621 * listener, if the original destination address was translated, the original
622 * address is retrieved. It returns 0 in case of success, -1 in case of error.
623 * The socket's source address is stored in <sa> for <salen> bytes.
624 */
625int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
626{
627 if (dir)
628 return getpeername(fd, sa, &salen);
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100629 else {
630 int ret = getsockname(fd, sa, &salen);
631
632 if (ret < 0)
633 return ret;
634
Willy Tarreaue5733232019-05-22 19:24:06 +0200635#if defined(USE_TPROXY) && defined(SO_ORIGINAL_DST)
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100636 /* For TPROXY and Netfilter's NAT, we can retrieve the original
637 * IPv4 address before DNAT/REDIRECT. We must not do that with
638 * other families because v6-mapped IPv4 addresses are still
639 * reported as v4.
640 */
641 if (((struct sockaddr_storage *)sa)->ss_family == AF_INET
642 && getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
643 return 0;
Willy Tarreau59b94792012-05-11 16:16:40 +0200644#endif
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100645 return ret;
646 }
Willy Tarreau59b94792012-05-11 16:16:40 +0200647}
648
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200649/* This is the callback which is set when a connection establishment is pending
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100650 * and we have nothing to send. It updates the FD polling status. It returns 0
651 * if it fails in a fatal way or needs to poll to go further, otherwise it
652 * returns non-zero and removes the CO_FL_WAIT_L4_CONN flag from the connection's
653 * flags. In case of error, it sets CO_FL_ERROR and leaves the error code in
654 * errno. The error checking is done in two passes in order to limit the number
655 * of syscalls in the normal case :
656 * - if POLL_ERR was reported by the poller, we check for a pending error on
657 * the socket before proceeding. If found, it's assigned to errno so that
658 * upper layers can see it.
659 * - otherwise connect() is used to check the connection state again, since
660 * the getsockopt return cannot reliably be used to know if the connection
661 * is still pending or ready. This one may often return an error as well,
662 * since we don't always have POLL_ERR (eg: OSX or cached events).
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200663 */
Willy Tarreau239d7182012-07-23 18:53:03 +0200664int tcp_connect_probe(struct connection *conn)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200665{
Willy Tarreau585744b2017-08-24 14:31:19 +0200666 int fd = conn->handle.fd;
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100667 socklen_t lskerr;
668 int skerr;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200669
Willy Tarreau80184712012-07-06 14:54:49 +0200670 if (conn->flags & CO_FL_ERROR)
Willy Tarreauafad0e02012-08-09 14:45:22 +0200671 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200672
Willy Tarreau3c728722014-01-23 13:50:42 +0100673 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200674 return 0;
675
Willy Tarreau80184712012-07-06 14:54:49 +0200676 if (!(conn->flags & CO_FL_WAIT_L4_CONN))
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200677 return 1; /* strange we were called while ready */
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200678
Willy Tarreaufd803bb2014-01-20 15:13:07 +0100679 if (!fd_send_ready(fd))
680 return 0;
681
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100682 /* we might be the first witness of FD_POLL_ERR. Note that FD_POLL_HUP
683 * without FD_POLL_IN also indicates a hangup without input data meaning
684 * there was no connection.
685 */
686 if (fdtab[fd].ev & FD_POLL_ERR ||
687 (fdtab[fd].ev & (FD_POLL_IN|FD_POLL_HUP)) == FD_POLL_HUP) {
688 skerr = 0;
689 lskerr = sizeof(skerr);
690 getsockopt(fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr);
691 errno = skerr;
692 if (errno == EAGAIN)
693 errno = 0;
694 if (errno)
695 goto out_error;
696 }
Willy Tarreau2da156f2012-07-23 15:07:23 +0200697
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100698 /* Use connect() to check the state of the socket. This has the
699 * advantage of giving us the following info :
Willy Tarreau2c6be842012-07-06 17:12:34 +0200700 * - error
701 * - connecting (EALREADY, EINPROGRESS)
702 * - connected (EISCONN, 0)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200703 */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200704 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) < 0) {
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200705 if (errno == EALREADY || errno == EINPROGRESS) {
Willy Tarreaud486ef52012-12-10 17:03:52 +0100706 __conn_sock_stop_recv(conn);
Willy Tarreaue1f50c42014-01-22 20:02:06 +0100707 fd_cant_send(fd);
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200708 return 0;
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200709 }
Willy Tarreaua190d592012-05-20 18:35:19 +0200710
Willy Tarreau2c6be842012-07-06 17:12:34 +0200711 if (errno && errno != EISCONN)
Willy Tarreaua190d592012-05-20 18:35:19 +0200712 goto out_error;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200713
Willy Tarreau2c6be842012-07-06 17:12:34 +0200714 /* otherwise we're connected */
Willy Tarreaua190d592012-05-20 18:35:19 +0200715 }
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200716
Willy Tarreau076be252012-07-06 16:02:29 +0200717 /* The FD is ready now, we'll mark the connection as complete and
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200718 * forward the event to the transport layer which will notify the
719 * data layer.
Willy Tarreaua190d592012-05-20 18:35:19 +0200720 */
Willy Tarreau80184712012-07-06 14:54:49 +0200721 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200722 return 1;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200723
724 out_error:
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200725 /* Write error on the file descriptor. Report it to the connection
726 * and disable polling on this FD.
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200727 */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100728 fdtab[fd].linger_risk = 0;
Willy Tarreau26f4a042013-12-04 23:44:10 +0100729 conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH;
Willy Tarreaud486ef52012-12-10 17:03:52 +0100730 __conn_sock_stop_both(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200731 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200732}
733
Olivier Houchard153659f2017-04-05 22:39:56 +0200734/* XXX: Should probably be elsewhere */
735static int compare_sockaddr(struct sockaddr_storage *a, struct sockaddr_storage *b)
736{
737 if (a->ss_family != b->ss_family) {
738 return (-1);
739 }
740 switch (a->ss_family) {
741 case AF_INET:
742 {
743 struct sockaddr_in *a4 = (void *)a, *b4 = (void *)b;
744 if (a4->sin_port != b4->sin_port)
745 return (-1);
746 return (memcmp(&a4->sin_addr, &b4->sin_addr,
747 sizeof(a4->sin_addr)));
748 }
749 case AF_INET6:
750 {
751 struct sockaddr_in6 *a6 = (void *)a, *b6 = (void *)b;
752 if (a6->sin6_port != b6->sin6_port)
753 return (-1);
754 return (memcmp(&a6->sin6_addr, &b6->sin6_addr,
755 sizeof(a6->sin6_addr)));
756 }
757 default:
758 return (-1);
759 }
760
761}
762
763#define LI_MANDATORY_FLAGS (LI_O_FOREIGN | LI_O_V6ONLY | LI_O_V4V6)
764/* When binding the listeners, check if a socket has been sent to us by the
765 * previous process that we could reuse, instead of creating a new one.
766 */
767static int tcp_find_compatible_fd(struct listener *l)
768{
769 struct xfer_sock_list *xfer_sock = xfer_sock_list;
770 int ret = -1;
771
772 while (xfer_sock) {
773 if (!compare_sockaddr(&xfer_sock->addr, &l->addr)) {
774 if ((l->interface == NULL && xfer_sock->iface == NULL) ||
775 (l->interface != NULL && xfer_sock->iface != NULL &&
776 !strcmp(l->interface, xfer_sock->iface))) {
777 if ((l->options & LI_MANDATORY_FLAGS) ==
778 (xfer_sock->options & LI_MANDATORY_FLAGS)) {
779 if ((xfer_sock->namespace == NULL &&
780 l->netns == NULL)
Willy Tarreaue5733232019-05-22 19:24:06 +0200781#ifdef USE_NS
Olivier Houchard153659f2017-04-05 22:39:56 +0200782 || (xfer_sock->namespace != NULL &&
783 l->netns != NULL &&
784 !strcmp(xfer_sock->namespace,
785 l->netns->node.key))
786#endif
787 ) {
788 break;
789 }
790
791 }
792 }
793 }
794 xfer_sock = xfer_sock->next;
795 }
796 if (xfer_sock != NULL) {
797 ret = xfer_sock->fd;
798 if (xfer_sock == xfer_sock_list)
799 xfer_sock_list = xfer_sock->next;
800 if (xfer_sock->prev)
801 xfer_sock->prev->next = xfer_sock->next;
802 if (xfer_sock->next)
803 xfer_sock->next->prev = xfer_sock->prev;
804 free(xfer_sock->iface);
805 free(xfer_sock->namespace);
806 free(xfer_sock);
807 }
808 return ret;
809}
810#undef L1_MANDATORY_FLAGS
Willy Tarreau59b94792012-05-11 16:16:40 +0200811
Willy Tarreaue6b98942007-10-29 01:09:36 +0100812/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100813 * an error message in <errmsg> if the message is at most <errlen> bytes long
814 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
815 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100816 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
817 * was alright and that no message was returned. ERR_RETRYABLE means that an
818 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700819 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100820 * the meaning of the error, but just indicate that a message is present which
821 * should be displayed with the respective level. Last, ERR_ABORT indicates
822 * that it's pointless to try to start other listeners. No error message is
823 * returned if errlen is NULL.
824 */
825int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
826{
827 __label__ tcp_return, tcp_close_return;
828 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100829 int ext, ready;
830 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100831 const char *msg = NULL;
Olivier Houchard153659f2017-04-05 22:39:56 +0200832#ifdef TCP_MAXSEG
833
834 /* Create a temporary TCP socket to get default parameters we can't
835 * guess.
836 * */
837 ready_len = sizeof(default_tcp_maxseg);
838 if (default_tcp_maxseg == -1) {
839 default_tcp_maxseg = -2;
840 fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
841 if (fd < 0)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100842 ha_warning("Failed to create a temporary socket!\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200843 else {
844 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp_maxseg,
845 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100846 ha_warning("Failed to get the default value of TCP_MAXSEG\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200847 }
848 close(fd);
849 }
850 if (default_tcp6_maxseg == -1) {
851 default_tcp6_maxseg = -2;
852 fd = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
853 if (fd >= 0) {
854 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp6_maxseg,
855 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100856 ha_warning("Failed ot get the default value of TCP_MAXSEG for IPv6\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200857 close(fd);
858 }
859 }
860#endif
861
Willy Tarreaue6b98942007-10-29 01:09:36 +0100862
863 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100864 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100865 *errmsg = 0;
866
867 if (listener->state != LI_ASSIGNED)
868 return ERR_NONE; /* already bound */
869
870 err = ERR_NONE;
871
Olivier Houchard153659f2017-04-05 22:39:56 +0200872 if (listener->fd == -1)
873 listener->fd = tcp_find_compatible_fd(listener);
874
Willy Tarreau40aa0702013-03-10 23:51:38 +0100875 /* if the listener already has an fd assigned, then we were offered the
876 * fd by an external process (most likely the parent), and we don't want
877 * to create a new socket. However we still want to set a few flags on
878 * the socket.
879 */
880 fd = listener->fd;
881 ext = (fd >= 0);
882
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100883 if (!ext) {
884 fd = my_socketat(listener->netns, listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
885
886 if (fd == -1) {
887 err |= ERR_RETRYABLE | ERR_ALERT;
888 msg = "cannot create listening socket";
889 goto tcp_return;
890 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100891 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100892
Willy Tarreaue6b98942007-10-29 01:09:36 +0100893 if (fd >= global.maxsock) {
894 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
895 msg = "not enough free sockets (raise '-n' parameter)";
896 goto tcp_close_return;
897 }
898
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200899 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100900 err |= ERR_FATAL | ERR_ALERT;
901 msg = "cannot make socket non-blocking";
902 goto tcp_close_return;
903 }
904
Willy Tarreau40aa0702013-03-10 23:51:38 +0100905 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100906 /* not fatal but should be reported */
907 msg = "cannot do so_reuseaddr";
908 err |= ERR_ALERT;
909 }
910
911 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900912 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Olivier Houchard153659f2017-04-05 22:39:56 +0200913 else {
914 struct linger tmplinger;
915 socklen_t len = sizeof(tmplinger);
916 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger, &len) == 0 &&
917 (tmplinger.l_onoff == 1 || tmplinger.l_linger == 0)) {
918 tmplinger.l_onoff = 0;
919 tmplinger.l_linger = 0;
920 setsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger,
921 sizeof(tmplinger));
922 }
923 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100924
Willy Tarreaue6b98942007-10-29 01:09:36 +0100925#ifdef SO_REUSEPORT
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000926 /* OpenBSD and Linux 3.9 support this. As it's present in old libc versions of
927 * Linux, it might return an error that we will silently ignore.
Willy Tarreaue6b98942007-10-29 01:09:36 +0100928 */
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000929 if (!ext && (global.tune.options & GTUNE_USE_REUSEPORT))
Willy Tarreau40aa0702013-03-10 23:51:38 +0100930 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100931#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200932
Willy Tarreau40aa0702013-03-10 23:51:38 +0100933 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200934 switch (listener->addr.ss_family) {
935 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200936 if (1
937#if defined(IP_TRANSPARENT)
938 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
939#endif
940#if defined(IP_FREEBIND)
941 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
942#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200943#if defined(IP_BINDANY)
944 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
945#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200946#if defined(SO_BINDANY)
947 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
948#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200949 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200950 msg = "cannot make listening socket transparent";
951 err |= ERR_ALERT;
952 }
953 break;
954 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200955 if (1
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200956#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200957 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
958#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100959#if defined(IP_FREEBIND)
960 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
961#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200962#if defined(IPV6_BINDANY)
963 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
964#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200965#if defined(SO_BINDANY)
966 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
967#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200968 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200969 msg = "cannot make listening socket transparent";
970 err |= ERR_ALERT;
971 }
972 break;
973 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100974 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200975
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100976#ifdef SO_BINDTODEVICE
977 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100978 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100979 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100980 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100981 msg = "cannot bind listener to device";
982 err |= ERR_WARN;
983 }
984 }
985#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400986#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100987 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400988 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200989 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
990 msg = "cannot set MSS";
991 err |= ERR_WARN;
992 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200993 } else if (ext) {
994 int tmpmaxseg = -1;
995 int defaultmss;
996 socklen_t len = sizeof(tmpmaxseg);
997
998 if (listener->addr.ss_family == AF_INET)
999 defaultmss = default_tcp_maxseg;
1000 else
1001 defaultmss = default_tcp6_maxseg;
1002
1003 getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &tmpmaxseg, &len);
1004 if (tmpmaxseg != defaultmss && setsockopt(fd, IPPROTO_TCP,
1005 TCP_MAXSEG, &defaultmss,
1006 sizeof(defaultmss)) == -1) {
1007 msg = "cannot set MSS";
1008 err |= ERR_WARN;
1009 }
Willy Tarreaube1b9182009-06-14 18:48:19 +02001010 }
1011#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01001012#if defined(TCP_USER_TIMEOUT)
1013 if (listener->tcp_ut) {
1014 if (setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT,
1015 &listener->tcp_ut, sizeof(listener->tcp_ut)) == -1) {
1016 msg = "cannot set TCP User Timeout";
1017 err |= ERR_WARN;
1018 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001019 } else
1020 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &zero,
1021 sizeof(zero));
Willy Tarreau2af207a2015-02-04 00:45:58 +01001022#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +02001023#if defined(TCP_DEFER_ACCEPT)
1024 if (listener->options & LI_O_DEF_ACCEPT) {
1025 /* defer accept by up to one second */
1026 int accept_delay = 1;
1027 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
1028 msg = "cannot enable DEFER_ACCEPT";
1029 err |= ERR_WARN;
1030 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001031 } else
1032 setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &zero,
1033 sizeof(zero));
Willy Tarreaucb6cd432009-10-13 07:34:14 +02001034#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001035#if defined(TCP_FASTOPEN)
1036 if (listener->options & LI_O_TCP_FO) {
1037 /* TFO needs a queue length, let's use the configured backlog */
Willy Tarreaue2711c72019-02-27 15:39:41 +01001038 int qlen = listener_backlog(listener);
Willy Tarreau1c862c52012-10-05 16:21:00 +02001039 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
1040 msg = "cannot enable TCP_FASTOPEN";
1041 err |= ERR_WARN;
1042 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001043 } else {
1044 socklen_t len;
1045 int qlen;
1046 len = sizeof(qlen);
1047 /* Only disable fast open if it was enabled, we don't want
1048 * the kernel to create a fast open queue if there's none.
1049 */
1050 if (getsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, &len) == 0 &&
1051 qlen != 0) {
1052 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &zero,
1053 sizeof(zero)) == -1) {
1054 msg = "cannot disable TCP_FASTOPEN";
1055 err |= ERR_WARN;
1056 }
1057 }
Willy Tarreau1c862c52012-10-05 16:21:00 +02001058 }
1059#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001060#if defined(IPV6_V6ONLY)
1061 if (listener->options & LI_O_V6ONLY)
1062 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +01001063 else if (listener->options & LI_O_V4V6)
1064 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001065#endif
1066
Willy Tarreau40aa0702013-03-10 23:51:38 +01001067 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +01001068 err |= ERR_RETRYABLE | ERR_ALERT;
1069 msg = "cannot bind socket";
1070 goto tcp_close_return;
1071 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001072
Willy Tarreau40aa0702013-03-10 23:51:38 +01001073 ready = 0;
1074 ready_len = sizeof(ready);
1075 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
1076 ready = 0;
1077
1078 if (!(ext && ready) && /* only listen if not already done by external process */
Willy Tarreaue2711c72019-02-27 15:39:41 +01001079 listen(fd, listener_backlog(listener)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +01001080 err |= ERR_RETRYABLE | ERR_ALERT;
1081 msg = "cannot listen to socket";
1082 goto tcp_close_return;
1083 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001084
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +04001085#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001086 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +09001087 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Olivier Houchard153659f2017-04-05 22:39:56 +02001088 else
1089 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001090#endif
1091
Willy Tarreaue6b98942007-10-29 01:09:36 +01001092 /* the socket is ready */
1093 listener->fd = fd;
1094 listener->state = LI_LISTEN;
1095
Willy Tarreaua9786b62018-01-25 07:22:13 +01001096 fd_insert(fd, listener, listener->proto->accept,
Willy Tarreaua36b3242019-02-02 13:14:34 +01001097 thread_mask(listener->bind_conf->bind_thread));
Willy Tarreaueb472682010-05-28 18:46:57 +02001098
Willy Tarreaue6b98942007-10-29 01:09:36 +01001099 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001100 if (msg && errlen) {
1101 char pn[INET6_ADDRSTRLEN];
1102
Willy Tarreau631f01c2011-09-05 00:36:48 +02001103 addr_to_str(&listener->addr, pn, sizeof(pn));
1104 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001105 }
Willy Tarreaue6b98942007-10-29 01:09:36 +01001106 return err;
1107
1108 tcp_close_return:
1109 close(fd);
1110 goto tcp_return;
1111}
1112
1113/* This function creates all TCP sockets bound to the protocol entry <proto>.
1114 * It is intended to be used as the protocol's bind_all() function.
1115 * The sockets will be registered but not added to any fd_set, in order not to
1116 * loose them across the fork(). A call to enable_all_listeners() is needed
1117 * to complete initialization. The return value is composed from ERR_*.
1118 */
Emeric Bruncf20bf12010-10-22 16:06:11 +02001119static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001120{
1121 struct listener *listener;
1122 int err = ERR_NONE;
1123
1124 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +02001125 err |= tcp_bind_listener(listener, errmsg, errlen);
1126 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001127 break;
1128 }
1129
1130 return err;
1131}
1132
Willy Tarreau32282382017-09-15 07:44:44 +02001133/* Add <listener> to the list of tcpv4 listeners, on port <port>. The
1134 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1135 * The number of listeners for the protocol is updated.
Willy Tarreaue6b98942007-10-29 01:09:36 +01001136 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001137static void tcpv4_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001138{
1139 if (listener->state != LI_INIT)
1140 return;
1141 listener->state = LI_ASSIGNED;
1142 listener->proto = &proto_tcpv4;
Willy Tarreau32282382017-09-15 07:44:44 +02001143 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001144 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
1145 proto_tcpv4.nb_listeners++;
1146}
1147
Willy Tarreau32282382017-09-15 07:44:44 +02001148/* Add <listener> to the list of tcpv6 listeners, on port <port>. The
1149 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1150 * The number of listeners for the protocol is updated.
Willy Tarreaue6b98942007-10-29 01:09:36 +01001151 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001152static void tcpv6_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001153{
1154 if (listener->state != LI_INIT)
1155 return;
1156 listener->state = LI_ASSIGNED;
1157 listener->proto = &proto_tcpv6;
Willy Tarreau32282382017-09-15 07:44:44 +02001158 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001159 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
1160 proto_tcpv6.nb_listeners++;
1161}
1162
Willy Tarreau092d8652014-07-07 20:22:12 +02001163/* Pause a listener. Returns < 0 in case of failure, 0 if the listener
1164 * was totally stopped, or > 0 if correctly paused.
1165 */
1166int tcp_pause_listener(struct listener *l)
1167{
1168 if (shutdown(l->fd, SHUT_WR) != 0)
1169 return -1; /* Solaris dies here */
1170
Willy Tarreaue2711c72019-02-27 15:39:41 +01001171 if (listen(l->fd, listener_backlog(l)) != 0)
Willy Tarreau092d8652014-07-07 20:22:12 +02001172 return -1; /* OpenBSD dies here */
1173
1174 if (shutdown(l->fd, SHUT_RD) != 0)
1175 return -1; /* should always be OK */
1176 return 1;
1177}
1178
William Lallemand2e785f22016-05-25 01:48:42 +02001179/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001180 * Execute the "set-src" action. May be called from {tcp,http}request.
1181 * It only changes the address and tries to preserve the original port. If the
1182 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand2e785f22016-05-25 01:48:42 +02001183 */
1184enum act_return tcp_action_req_set_src(struct act_rule *rule, struct proxy *px,
1185 struct session *sess, struct stream *s, int flags)
1186{
1187 struct connection *cli_conn;
1188
1189 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1190 struct sample *smp;
1191
1192 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1193 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001194 int port = get_net_port(&cli_conn->addr.from);
1195
William Lallemand2e785f22016-05-25 01:48:42 +02001196 if (smp->data.type == SMP_T_IPV4) {
1197 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_family = AF_INET;
1198 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001199 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001200 } else if (smp->data.type == SMP_T_IPV6) {
1201 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_family = AF_INET6;
1202 memcpy(&((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
Willy Tarreau00005ce2016-10-21 15:07:45 +02001203 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001204 }
1205 }
William Lallemand01252ed2016-05-25 02:33:16 +02001206 cli_conn->flags |= CO_FL_ADDR_FROM_SET;
William Lallemand2e785f22016-05-25 01:48:42 +02001207 }
1208 return ACT_RET_CONT;
1209}
1210
William Lallemand44be6402016-05-25 01:51:35 +02001211/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001212 * Execute the "set-dst" action. May be called from {tcp,http}request.
1213 * It only changes the address and tries to preserve the original port. If the
1214 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001215 */
1216enum act_return tcp_action_req_set_dst(struct act_rule *rule, struct proxy *px,
1217 struct session *sess, struct stream *s, int flags)
1218{
1219 struct connection *cli_conn;
1220
1221 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1222 struct sample *smp;
1223
1224 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1225 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001226 int port = get_net_port(&cli_conn->addr.to);
1227
William Lallemand13e9b0c2016-05-25 02:34:07 +02001228 if (smp->data.type == SMP_T_IPV4) {
1229 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_family = AF_INET;
1230 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
1231 } else if (smp->data.type == SMP_T_IPV6) {
1232 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_family = AF_INET6;
1233 memcpy(&((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr, &smp->data.u.ipv6, sizeof(struct in6_addr));
Willy Tarreau00005ce2016-10-21 15:07:45 +02001234 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_port = port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001235 }
1236 cli_conn->flags |= CO_FL_ADDR_TO_SET;
1237 }
1238 }
1239 return ACT_RET_CONT;
1240}
1241
1242/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001243 * Execute the "set-src-port" action. May be called from {tcp,http}request.
1244 * We must test the sin_family before setting the port. If the address family
1245 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1246 * and the port is assigned.
William Lallemand44be6402016-05-25 01:51:35 +02001247 */
1248enum act_return tcp_action_req_set_src_port(struct act_rule *rule, struct proxy *px,
1249 struct session *sess, struct stream *s, int flags)
1250{
1251 struct connection *cli_conn;
1252
1253 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1254 struct sample *smp;
1255
1256 conn_get_from_addr(cli_conn);
1257
1258 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1259 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001260 if (cli_conn->addr.from.ss_family == AF_INET6) {
William Lallemand44be6402016-05-25 01:51:35 +02001261 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001262 } else {
1263 if (cli_conn->addr.from.ss_family != AF_INET) {
1264 cli_conn->addr.from.ss_family = AF_INET;
1265 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr = 0;
1266 }
1267 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_port = htons(smp->data.u.sint);
William Lallemand44be6402016-05-25 01:51:35 +02001268 }
1269 }
1270 }
1271 return ACT_RET_CONT;
1272}
1273
William Lallemand13e9b0c2016-05-25 02:34:07 +02001274/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001275 * Execute the "set-dst-port" action. May be called from {tcp,http}request.
1276 * We must test the sin_family before setting the port. If the address family
1277 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1278 * and the port is assigned.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001279 */
1280enum act_return tcp_action_req_set_dst_port(struct act_rule *rule, struct proxy *px,
1281 struct session *sess, struct stream *s, int flags)
1282{
1283 struct connection *cli_conn;
1284
1285 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1286 struct sample *smp;
1287
1288 conn_get_to_addr(cli_conn);
1289
1290 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1291 if (smp) {
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001292 if (cli_conn->addr.to.ss_family == AF_INET6) {
1293 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001294 } else {
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001295 if (cli_conn->addr.to.ss_family != AF_INET) {
1296 cli_conn->addr.to.ss_family = AF_INET;
1297 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr = 0;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001298 }
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001299 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_port = htons(smp->data.u.sint);
William Lallemand13e9b0c2016-05-25 02:34:07 +02001300 }
1301 }
1302 }
1303 return ACT_RET_CONT;
1304}
1305
Willy Tarreau2d392c22015-08-24 01:43:45 +02001306/* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
1307static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct proxy *px, struct session *sess, struct stream *strm, int flags)
1308{
1309 struct connection *conn = objt_conn(sess->origin);
1310
1311 if (!conn)
1312 goto out;
1313
1314 if (!conn_ctrl_ready(conn))
1315 goto out;
1316
Willy Tarreau2d392c22015-08-24 01:43:45 +02001317#ifdef TCP_QUICKACK
Willy Tarreaufc2a2d92015-09-29 18:15:01 +02001318 /* drain is needed only to send the quick ACK */
1319 conn_sock_drain(conn);
1320
Willy Tarreau2d392c22015-08-24 01:43:45 +02001321 /* re-enable quickack if it was disabled to ack all data and avoid
1322 * retransmits from the client that might trigger a real reset.
1323 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001324 setsockopt(conn->handle.fd, SOL_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001325#endif
1326 /* lingering must absolutely be disabled so that we don't send a
1327 * shutdown(), this is critical to the TCP_REPAIR trick. When no stream
1328 * is present, returning with ERR will cause lingering to be disabled.
1329 */
1330 if (strm)
1331 strm->si[0].flags |= SI_FL_NOLINGER;
1332
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001333 /* We're on the client-facing side, we must force to disable lingering to
1334 * ensure we will use an RST exclusively and kill any pending data.
1335 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001336 fdtab[conn->handle.fd].linger_risk = 1;
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001337
Willy Tarreau2d392c22015-08-24 01:43:45 +02001338#ifdef TCP_REPAIR
Willy Tarreau585744b2017-08-24 14:31:19 +02001339 if (setsockopt(conn->handle.fd, SOL_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
Willy Tarreau2d392c22015-08-24 01:43:45 +02001340 /* socket will be quiet now */
1341 goto out;
1342 }
1343#endif
1344 /* either TCP_REPAIR is not defined or it failed (eg: permissions).
1345 * Let's fall back on the TTL trick, though it only works for routed
1346 * network and has no effect on local net.
1347 */
1348#ifdef IP_TTL
Willy Tarreau585744b2017-08-24 14:31:19 +02001349 setsockopt(conn->handle.fd, SOL_IP, IP_TTL, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001350#endif
1351 out:
1352 /* kill the stream if any */
1353 if (strm) {
1354 channel_abort(&strm->req);
1355 channel_abort(&strm->res);
1356 strm->req.analysers = 0;
1357 strm->res.analysers = 0;
Olivier Houchard40514102019-03-08 18:54:04 +01001358 _HA_ATOMIC_ADD(&strm->be->be_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001359 if (!(strm->flags & SF_ERR_MASK))
1360 strm->flags |= SF_ERR_PRXCOND;
1361 if (!(strm->flags & SF_FINST_MASK))
1362 strm->flags |= SF_FINST_R;
1363 }
1364
Olivier Houchard40514102019-03-08 18:54:04 +01001365 _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001366 if (sess->listener->counters)
Olivier Houchard40514102019-03-08 18:54:04 +01001367 _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001368
1369 return ACT_RET_STOP;
1370}
1371
William Lallemand13e9b0c2016-05-25 02:34:07 +02001372/* parse "set-{src,dst}[-port]" action */
1373enum 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 +02001374{
1375 int cur_arg;
1376 struct sample_expr *expr;
1377 unsigned int where;
1378
1379 cur_arg = *orig_arg;
1380 expr = sample_parse_expr((char **)args, &cur_arg, px->conf.args.file, px->conf.args.line, err, &px->conf.args);
1381 if (!expr)
1382 return ACT_RET_PRS_ERR;
1383
1384 where = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001385 if (px->cap & PR_CAP_FE)
William Lallemand2e785f22016-05-25 01:48:42 +02001386 where |= SMP_VAL_FE_HRQ_HDR;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001387 if (px->cap & PR_CAP_BE)
William Lallemand2e785f22016-05-25 01:48:42 +02001388 where |= SMP_VAL_BE_HRQ_HDR;
1389
1390 if (!(expr->fetch->val & where)) {
1391 memprintf(err,
1392 "fetch method '%s' extracts information from '%s', none of which is available here",
1393 args[cur_arg-1], sample_src_names(expr->fetch->use));
1394 free(expr);
1395 return ACT_RET_PRS_ERR;
1396 }
1397 rule->arg.expr = expr;
1398 rule->action = ACT_CUSTOM;
1399
1400 if (!strcmp(args[*orig_arg-1], "set-src")) {
1401 rule->action_ptr = tcp_action_req_set_src;
William Lallemand44be6402016-05-25 01:51:35 +02001402 } else if (!strcmp(args[*orig_arg-1], "set-src-port")) {
1403 rule->action_ptr = tcp_action_req_set_src_port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001404 } else if (!strcmp(args[*orig_arg-1], "set-dst")) {
1405 rule->action_ptr = tcp_action_req_set_dst;
1406 } else if (!strcmp(args[*orig_arg-1], "set-dst-port")) {
1407 rule->action_ptr = tcp_action_req_set_dst_port;
William Lallemand2e785f22016-05-25 01:48:42 +02001408 } else {
1409 return ACT_RET_PRS_ERR;
1410 }
1411
1412 (*orig_arg)++;
1413
1414 return ACT_RET_PRS_OK;
1415}
1416
1417
Willy Tarreau2d392c22015-08-24 01:43:45 +02001418/* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
1419 * success, ACT_RET_PRS_ERR on error.
1420 */
1421static enum act_parse_ret tcp_parse_silent_drop(const char **args, int *orig_arg, struct proxy *px,
1422 struct act_rule *rule, char **err)
1423{
1424 rule->action = ACT_CUSTOM;
1425 rule->action_ptr = tcp_exec_action_silent_drop;
1426 return ACT_RET_PRS_OK;
1427}
1428
Willy Tarreau645513a2010-05-24 20:55:15 +02001429
1430/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001431/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02001432/************************************************************************/
1433
Willy Tarreau4a129812012-04-25 17:31:42 +02001434/* fetch the connection's source IPv4/IPv6 address */
Thierry FOURNIERa123ad82015-07-24 09:12:15 +02001435int smp_fetch_src(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001436{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001437 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001438
1439 if (!cli_conn)
1440 return 0;
1441
1442 switch (cli_conn->addr.from.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001443 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001444 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001445 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001446 break;
1447 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001448 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001449 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001450 break;
1451 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001452 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001453 }
Emeric Brunf769f512010-10-22 17:14:01 +02001454
Willy Tarreau37406352012-04-23 16:16:37 +02001455 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001456 return 1;
1457}
1458
Willy Tarreaua5e37562011-12-16 17:06:15 +01001459/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001460static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001461smp_fetch_sport(const struct arg *args, struct sample *smp, const char *k, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001462{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001463 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001464
1465 if (!cli_conn)
1466 return 0;
1467
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001468 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001469 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.from)))
Emeric Brunf769f512010-10-22 17:14:01 +02001470 return 0;
1471
Willy Tarreau37406352012-04-23 16:16:37 +02001472 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001473 return 1;
1474}
1475
Willy Tarreau4a129812012-04-25 17:31:42 +02001476/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001477static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001478smp_fetch_dst(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001479{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001480 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreau645513a2010-05-24 20:55:15 +02001481
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001482 if (!cli_conn)
1483 return 0;
1484
1485 conn_get_to_addr(cli_conn);
1486
1487 switch (cli_conn->addr.to.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001488 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001489 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001490 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001491 break;
1492 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001493 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001494 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001495 break;
1496 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001497 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001498 }
Emeric Brunf769f512010-10-22 17:14:01 +02001499
Willy Tarreau37406352012-04-23 16:16:37 +02001500 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001501 return 1;
1502}
1503
Willy Tarreau16e01562016-08-09 16:46:18 +02001504/* check if the destination address of the front connection is local to the
1505 * system or if it was intercepted.
1506 */
1507int smp_fetch_dst_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1508{
1509 struct connection *conn = objt_conn(smp->sess->origin);
1510 struct listener *li = smp->sess->listener;
1511
1512 if (!conn)
1513 return 0;
1514
1515 conn_get_to_addr(conn);
1516 if (!(conn->flags & CO_FL_ADDR_TO_SET))
1517 return 0;
1518
1519 smp->data.type = SMP_T_BOOL;
1520 smp->flags = 0;
1521 smp->data.u.sint = addr_is_local(li->netns, &conn->addr.to);
1522 return smp->data.u.sint >= 0;
1523}
1524
1525/* check if the source address of the front connection is local to the system
1526 * or not.
1527 */
1528int smp_fetch_src_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1529{
1530 struct connection *conn = objt_conn(smp->sess->origin);
1531 struct listener *li = smp->sess->listener;
1532
1533 if (!conn)
1534 return 0;
1535
1536 conn_get_from_addr(conn);
1537 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
1538 return 0;
1539
1540 smp->data.type = SMP_T_BOOL;
1541 smp->flags = 0;
1542 smp->data.u.sint = addr_is_local(li->netns, &conn->addr.from);
1543 return smp->data.u.sint >= 0;
1544}
1545
Willy Tarreaua5e37562011-12-16 17:06:15 +01001546/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001547static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001548smp_fetch_dport(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001549{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001550 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001551
1552 if (!cli_conn)
1553 return 0;
1554
1555 conn_get_to_addr(cli_conn);
Willy Tarreau645513a2010-05-24 20:55:15 +02001556
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001557 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001558 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.to)))
Emeric Brunf769f512010-10-22 17:14:01 +02001559 return 0;
1560
Willy Tarreau37406352012-04-23 16:16:37 +02001561 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001562 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01001563}
1564
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001565#ifdef TCP_INFO
1566
Joseph Herlanta6331472018-11-25 12:59:12 -08001567/* Returns some tcp_info data if it's available. "dir" must be set to 0 if
1568 * the client connection is required, otherwise it is set to 1. "val" represents
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001569 * the required value. Use 0 for rtt and 1 for rttavg. "unit" is the expected unit
1570 * by default, the rtt is in us. Id "unit" is set to 0, the unit is us, if it is
Joseph Herlanta6331472018-11-25 12:59:12 -08001571 * set to 1, the units are milliseconds.
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001572 * If the function fails it returns 0, otherwise it returns 1 and "result" is filled.
1573 */
1574static inline int get_tcp_info(const struct arg *args, struct sample *smp,
1575 int dir, int val)
1576{
1577 struct connection *conn;
1578 struct tcp_info info;
1579 socklen_t optlen;
1580
1581 /* strm can be null. */
1582 if (!smp->strm)
1583 return 0;
1584
1585 /* get the object associated with the stream interface.The
1586 * object can be other thing than a connection. For example,
1587 * it be a appctx. */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001588 conn = cs_conn(objt_cs(smp->strm->si[dir].end));
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001589 if (!conn)
1590 return 0;
1591
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001592 /* The fd may not be available for the tcp_info struct, and the
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001593 syscal can fail. */
1594 optlen = sizeof(info);
Willy Tarreau585744b2017-08-24 14:31:19 +02001595 if (getsockopt(conn->handle.fd, SOL_TCP, TCP_INFO, &info, &optlen) == -1)
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001596 return 0;
1597
1598 /* extract the value. */
1599 smp->data.type = SMP_T_SINT;
1600 switch (val) {
Joe Williams30fcd392016-08-10 07:06:44 -07001601 case 0: smp->data.u.sint = info.tcpi_rtt; break;
1602 case 1: smp->data.u.sint = info.tcpi_rttvar; break;
1603#if defined(__linux__)
1604 /* these ones are common to all Linux versions */
1605 case 2: smp->data.u.sint = info.tcpi_unacked; break;
1606 case 3: smp->data.u.sint = info.tcpi_sacked; break;
1607 case 4: smp->data.u.sint = info.tcpi_lost; break;
1608 case 5: smp->data.u.sint = info.tcpi_retrans; break;
1609 case 6: smp->data.u.sint = info.tcpi_fackets; break;
1610 case 7: smp->data.u.sint = info.tcpi_reordering; break;
1611#elif defined(__FreeBSD__) || defined(__NetBSD__)
1612 /* the ones are found on FreeBSD and NetBSD featuring TCP_INFO */
1613 case 2: smp->data.u.sint = info.__tcpi_unacked; break;
1614 case 3: smp->data.u.sint = info.__tcpi_sacked; break;
1615 case 4: smp->data.u.sint = info.__tcpi_lost; break;
1616 case 5: smp->data.u.sint = info.__tcpi_retrans; break;
1617 case 6: smp->data.u.sint = info.__tcpi_fackets; break;
1618 case 7: smp->data.u.sint = info.__tcpi_reordering; break;
1619#endif
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001620 default: return 0;
1621 }
1622
1623 /* Convert the value as expected. */
1624 if (args) {
1625 if (args[0].type == ARGT_STR) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001626 if (strcmp(args[0].data.str.area, "us") == 0) {
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001627 /* Do nothing. */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001628 } else if (strcmp(args[0].data.str.area, "ms") == 0) {
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001629 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1630 } else
1631 return 0;
1632 } else if (args[0].type == ARGT_STOP) {
1633 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1634 } else
1635 return 0;
1636 }
1637
1638 return 1;
1639}
1640
1641/* get the mean rtt of a client connexion */
1642static int
1643smp_fetch_fc_rtt(const struct arg *args, struct sample *smp, const char *kw, void *private)
1644{
1645 if (!get_tcp_info(args, smp, 0, 0))
1646 return 0;
1647 return 1;
1648}
1649
1650/* get the variance of the mean rtt of a client connexion */
1651static int
1652smp_fetch_fc_rttvar(const struct arg *args, struct sample *smp, const char *kw, void *private)
1653{
1654 if (!get_tcp_info(args, smp, 0, 1))
1655 return 0;
1656 return 1;
1657}
Joe Williams30fcd392016-08-10 07:06:44 -07001658
1659#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1660
1661/* get the unacked counter on a client connexion */
1662static int
1663smp_fetch_fc_unacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1664{
1665 if (!get_tcp_info(args, smp, 0, 2))
1666 return 0;
1667 return 1;
1668}
1669
1670/* get the sacked counter on a client connexion */
1671static int
1672smp_fetch_fc_sacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1673{
1674 if (!get_tcp_info(args, smp, 0, 3))
1675 return 0;
1676 return 1;
1677}
1678
1679/* get the lost counter on a client connexion */
1680static int
1681smp_fetch_fc_lost(const struct arg *args, struct sample *smp, const char *kw, void *private)
1682{
1683 if (!get_tcp_info(args, smp, 0, 4))
1684 return 0;
1685 return 1;
1686}
1687
1688/* get the retrans counter on a client connexion */
1689static int
1690smp_fetch_fc_retrans(const struct arg *args, struct sample *smp, const char *kw, void *private)
1691{
1692 if (!get_tcp_info(args, smp, 0, 5))
1693 return 0;
1694 return 1;
1695}
1696
1697/* get the fackets counter on a client connexion */
1698static int
1699smp_fetch_fc_fackets(const struct arg *args, struct sample *smp, const char *kw, void *private)
1700{
1701 if (!get_tcp_info(args, smp, 0, 6))
1702 return 0;
1703 return 1;
1704}
1705
1706/* get the reordering counter on a client connexion */
1707static int
1708smp_fetch_fc_reordering(const struct arg *args, struct sample *smp, const char *kw, void *private)
1709{
1710 if (!get_tcp_info(args, smp, 0, 7))
1711 return 0;
1712 return 1;
1713}
1714#endif // linux || freebsd || netbsd
1715#endif // TCP_INFO
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001716
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001717#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001718/* parse the "v4v6" bind keyword */
1719static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1720{
1721 struct listener *l;
1722
1723 list_for_each_entry(l, &conf->listeners, by_bind) {
1724 if (l->addr.ss_family == AF_INET6)
1725 l->options |= LI_O_V4V6;
1726 }
1727
1728 return 0;
1729}
1730
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001731/* parse the "v6only" bind keyword */
1732static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1733{
1734 struct listener *l;
1735
1736 list_for_each_entry(l, &conf->listeners, by_bind) {
1737 if (l->addr.ss_family == AF_INET6)
1738 l->options |= LI_O_V6ONLY;
1739 }
1740
1741 return 0;
1742}
1743#endif
1744
Pieter Baauwd551fb52013-05-08 22:49:23 +02001745#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001746/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001747static 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 +02001748{
1749 struct listener *l;
1750
Willy Tarreau4348fad2012-09-20 16:48:07 +02001751 list_for_each_entry(l, &conf->listeners, by_bind) {
1752 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1753 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02001754 }
1755
Willy Tarreau44791242012-09-12 23:27:21 +02001756 return 0;
1757}
1758#endif
1759
1760#ifdef TCP_DEFER_ACCEPT
1761/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001762static 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 +02001763{
1764 struct listener *l;
1765
Willy Tarreau4348fad2012-09-20 16:48:07 +02001766 list_for_each_entry(l, &conf->listeners, by_bind) {
1767 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1768 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02001769 }
1770
Willy Tarreau44791242012-09-12 23:27:21 +02001771 return 0;
1772}
1773#endif
1774
Willy Tarreau1c862c52012-10-05 16:21:00 +02001775#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01001776/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02001777static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1778{
1779 struct listener *l;
1780
1781 list_for_each_entry(l, &conf->listeners, by_bind) {
1782 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1783 l->options |= LI_O_TCP_FO;
1784 }
1785
1786 return 0;
1787}
1788#endif
1789
Willy Tarreau44791242012-09-12 23:27:21 +02001790#ifdef TCP_MAXSEG
1791/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001792static 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 +02001793{
1794 struct listener *l;
1795 int mss;
1796
Willy Tarreau44791242012-09-12 23:27:21 +02001797 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001798 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001799 return ERR_ALERT | ERR_FATAL;
1800 }
1801
1802 mss = atoi(args[cur_arg + 1]);
1803 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001804 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001805 return ERR_ALERT | ERR_FATAL;
1806 }
1807
Willy Tarreau4348fad2012-09-20 16:48:07 +02001808 list_for_each_entry(l, &conf->listeners, by_bind) {
1809 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1810 l->maxseg = mss;
1811 }
Willy Tarreau44791242012-09-12 23:27:21 +02001812
1813 return 0;
1814}
1815#endif
1816
Willy Tarreau2af207a2015-02-04 00:45:58 +01001817#ifdef TCP_USER_TIMEOUT
1818/* parse the "tcp-ut" bind keyword */
1819static int bind_parse_tcp_ut(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1820{
1821 const char *ptr = NULL;
1822 struct listener *l;
1823 unsigned int timeout;
1824
1825 if (!*args[cur_arg + 1]) {
1826 memprintf(err, "'%s' : missing TCP User Timeout value", args[cur_arg]);
1827 return ERR_ALERT | ERR_FATAL;
1828 }
1829
1830 ptr = parse_time_err(args[cur_arg + 1], &timeout, TIME_UNIT_MS);
1831 if (ptr) {
1832 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[cur_arg]);
1833 return ERR_ALERT | ERR_FATAL;
1834 }
1835
1836 list_for_each_entry(l, &conf->listeners, by_bind) {
1837 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1838 l->tcp_ut = timeout;
1839 }
1840
1841 return 0;
1842}
1843#endif
1844
Willy Tarreau44791242012-09-12 23:27:21 +02001845#ifdef SO_BINDTODEVICE
Willy Tarreau2af207a2015-02-04 00:45:58 +01001846/* parse the "interface" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001847static 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 +02001848{
1849 struct listener *l;
1850
Willy Tarreau44791242012-09-12 23:27:21 +02001851 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001852 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001853 return ERR_ALERT | ERR_FATAL;
1854 }
1855
Willy Tarreau4348fad2012-09-20 16:48:07 +02001856 list_for_each_entry(l, &conf->listeners, by_bind) {
1857 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1858 l->interface = strdup(args[cur_arg + 1]);
1859 }
Willy Tarreau44791242012-09-12 23:27:21 +02001860
Willy Tarreau44791242012-09-12 23:27:21 +02001861 return 0;
1862}
1863#endif
1864
Willy Tarreaue5733232019-05-22 19:24:06 +02001865#ifdef USE_NS
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001866/* parse the "namespace" bind keyword */
1867static int bind_parse_namespace(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1868{
1869 struct listener *l;
1870 char *namespace = NULL;
1871
1872 if (!*args[cur_arg + 1]) {
1873 memprintf(err, "'%s' : missing namespace id", args[cur_arg]);
1874 return ERR_ALERT | ERR_FATAL;
1875 }
1876 namespace = args[cur_arg + 1];
1877
1878 list_for_each_entry(l, &conf->listeners, by_bind) {
1879 l->netns = netns_store_lookup(namespace, strlen(namespace));
1880
1881 if (l->netns == NULL)
1882 l->netns = netns_store_insert(namespace);
1883
1884 if (l->netns == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001885 ha_alert("Cannot open namespace '%s'.\n", args[cur_arg + 1]);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001886 return ERR_ALERT | ERR_FATAL;
1887 }
1888 }
1889 return 0;
1890}
1891#endif
1892
Willy Tarreau163d4622015-10-13 16:16:41 +02001893#ifdef TCP_USER_TIMEOUT
1894/* parse the "tcp-ut" server keyword */
1895static int srv_parse_tcp_ut(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1896{
1897 const char *ptr = NULL;
1898 unsigned int timeout;
1899
1900 if (!*args[*cur_arg + 1]) {
1901 memprintf(err, "'%s' : missing TCP User Timeout value", args[*cur_arg]);
1902 return ERR_ALERT | ERR_FATAL;
1903 }
1904
1905 ptr = parse_time_err(args[*cur_arg + 1], &timeout, TIME_UNIT_MS);
1906 if (ptr) {
1907 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[*cur_arg]);
1908 return ERR_ALERT | ERR_FATAL;
1909 }
1910
1911 if (newsrv->addr.ss_family == AF_INET || newsrv->addr.ss_family == AF_INET6)
1912 newsrv->tcp_ut = timeout;
1913
1914 return 0;
1915}
1916#endif
1917
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001918
Willy Tarreau4a129812012-04-25 17:31:42 +02001919/* Note: must not be declared <const> as its list will be overwritten.
1920 * Note: fetches that may return multiple types must be declared as the lowest
1921 * common denominator, the type that can be casted into all other ones. For
1922 * instance v4/v6 must be declared v4.
1923 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02001924static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001925 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001926 { "dst_is_local", smp_fetch_dst_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001927 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001928 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001929 { "src_is_local", smp_fetch_src_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001930 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001931#ifdef TCP_INFO
Joe Williams30fcd392016-08-10 07:06:44 -07001932 { "fc_rtt", smp_fetch_fc_rtt, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1933 { "fc_rttvar", smp_fetch_fc_rttvar, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1934#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1935 { "fc_unacked", smp_fetch_fc_unacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1936 { "fc_sacked", smp_fetch_fc_sacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1937 { "fc_retrans", smp_fetch_fc_retrans, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1938 { "fc_fackets", smp_fetch_fc_fackets, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1939 { "fc_lost", smp_fetch_fc_lost, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1940 { "fc_reordering", smp_fetch_fc_reordering, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1941#endif // linux || freebsd || netbsd
1942#endif // TCP_INFO
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001943 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02001944}};
1945
Willy Tarreau0108d902018-11-25 19:14:37 +01001946INITCALL1(STG_REGISTER, sample_register_fetches, &sample_fetch_keywords);
1947
Willy Tarreau44791242012-09-12 23:27:21 +02001948/************************************************************************/
1949/* All supported bind keywords must be declared here. */
1950/************************************************************************/
1951
1952/* Note: must not be declared <const> as its list will be overwritten.
1953 * Please take care of keeping this list alphabetically sorted, doing so helps
1954 * all code contributors.
1955 * Optional keywords are also declared with a NULL ->parse() function so that
1956 * the config parser can report an appropriate error when a known keyword was
1957 * not enabled.
1958 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02001959static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02001960#ifdef TCP_DEFER_ACCEPT
1961 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
1962#endif
1963#ifdef SO_BINDTODEVICE
1964 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
1965#endif
1966#ifdef TCP_MAXSEG
1967 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
1968#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01001969#ifdef TCP_USER_TIMEOUT
1970 { "tcp-ut", bind_parse_tcp_ut, 1 }, /* set User Timeout on listening socket */
1971#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001972#ifdef TCP_FASTOPEN
1973 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
1974#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02001975#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001976 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
1977#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001978#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001979 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001980 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
1981#endif
Willy Tarreaue5733232019-05-22 19:24:06 +02001982#ifdef USE_NS
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001983 { "namespace", bind_parse_namespace, 1 },
1984#endif
Willy Tarreau44791242012-09-12 23:27:21 +02001985 /* the versions with the NULL parse function*/
1986 { "defer-accept", NULL, 0 },
1987 { "interface", NULL, 1 },
1988 { "mss", NULL, 1 },
1989 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01001990 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001991 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02001992 { NULL, NULL, 0 },
1993}};
1994
Willy Tarreau0108d902018-11-25 19:14:37 +01001995INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws);
1996
Willy Tarreau163d4622015-10-13 16:16:41 +02001997static struct srv_kw_list srv_kws = { "TCP", { }, {
1998#ifdef TCP_USER_TIMEOUT
Frédéric Lécaille5c3cd972017-03-15 16:36:09 +01001999 { "tcp-ut", srv_parse_tcp_ut, 1, 1 }, /* set TCP user timeout on server */
Willy Tarreau163d4622015-10-13 16:16:41 +02002000#endif
2001 { NULL, NULL, 0 },
2002}};
Willy Tarreau2d392c22015-08-24 01:43:45 +02002003
Willy Tarreau0108d902018-11-25 19:14:37 +01002004INITCALL1(STG_REGISTER, srv_register_keywords, &srv_kws);
2005
Willy Tarreau2d392c22015-08-24 01:43:45 +02002006static struct action_kw_list tcp_req_conn_actions = {ILH, {
William Lallemand13e9b0c2016-05-25 02:34:07 +02002007 { "set-src", tcp_parse_set_src_dst },
2008 { "set-src-port", tcp_parse_set_src_dst },
2009 { "set-dst" , tcp_parse_set_src_dst },
2010 { "set-dst-port", tcp_parse_set_src_dst },
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002011 { "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_conn_keywords_register, &tcp_req_conn_actions);
2016
Willy Tarreau620408f2016-10-21 16:37:51 +02002017static struct action_kw_list tcp_req_sess_actions = {ILH, {
Willy Tarreau620408f2016-10-21 16:37:51 +02002018 { "set-src", tcp_parse_set_src_dst },
2019 { "set-src-port", tcp_parse_set_src_dst },
2020 { "set-dst" , tcp_parse_set_src_dst },
2021 { "set-dst-port", tcp_parse_set_src_dst },
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002022 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau620408f2016-10-21 16:37:51 +02002023 { /* END */ }
2024}};
2025
Willy Tarreau0108d902018-11-25 19:14:37 +01002026INITCALL1(STG_REGISTER, tcp_req_sess_keywords_register, &tcp_req_sess_actions);
2027
Willy Tarreau2d392c22015-08-24 01:43:45 +02002028static struct action_kw_list tcp_req_cont_actions = {ILH, {
Baptiste Assmanne1afd4f2019-04-18 16:21:13 +02002029 { "set-dst" , tcp_parse_set_src_dst },
2030 { "set-dst-port", tcp_parse_set_src_dst },
2031 { "silent-drop", tcp_parse_silent_drop },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002032 { /* END */ }
2033}};
2034
Willy Tarreau0108d902018-11-25 19:14:37 +01002035INITCALL1(STG_REGISTER, tcp_req_cont_keywords_register, &tcp_req_cont_actions);
2036
Willy Tarreau2d392c22015-08-24 01:43:45 +02002037static struct action_kw_list tcp_res_cont_actions = {ILH, {
2038 { "silent-drop", tcp_parse_silent_drop },
2039 { /* END */ }
2040}};
2041
Willy Tarreau0108d902018-11-25 19:14:37 +01002042INITCALL1(STG_REGISTER, tcp_res_cont_keywords_register, &tcp_res_cont_actions);
2043
Willy Tarreau2d392c22015-08-24 01:43:45 +02002044static struct action_kw_list http_req_actions = {ILH, {
William Lallemand2e785f22016-05-25 01:48:42 +02002045 { "silent-drop", tcp_parse_silent_drop },
William Lallemand13e9b0c2016-05-25 02:34:07 +02002046 { "set-src", tcp_parse_set_src_dst },
2047 { "set-src-port", tcp_parse_set_src_dst },
2048 { "set-dst", tcp_parse_set_src_dst },
2049 { "set-dst-port", tcp_parse_set_src_dst },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002050 { /* END */ }
2051}};
2052
Willy Tarreau0108d902018-11-25 19:14:37 +01002053INITCALL1(STG_REGISTER, http_req_keywords_register, &http_req_actions);
2054
Willy Tarreau2d392c22015-08-24 01:43:45 +02002055static struct action_kw_list http_res_actions = {ILH, {
2056 { "silent-drop", tcp_parse_silent_drop },
2057 { /* END */ }
2058}};
2059
Willy Tarreau0108d902018-11-25 19:14:37 +01002060INITCALL1(STG_REGISTER, http_res_keywords_register, &http_res_actions);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002061
Willy Tarreau80713382018-11-26 10:19:54 +01002062REGISTER_BUILD_OPTS("Built with transparent proxy support using:"
Willy Tarreauba962912016-12-21 18:55:02 +01002063#if defined(IP_TRANSPARENT)
Willy Tarreau80713382018-11-26 10:19:54 +01002064 " IP_TRANSPARENT"
Willy Tarreauba962912016-12-21 18:55:02 +01002065#endif
2066#if defined(IPV6_TRANSPARENT)
Willy Tarreau80713382018-11-26 10:19:54 +01002067 " IPV6_TRANSPARENT"
Willy Tarreauba962912016-12-21 18:55:02 +01002068#endif
2069#if defined(IP_FREEBIND)
Willy Tarreau80713382018-11-26 10:19:54 +01002070 " IP_FREEBIND"
Willy Tarreauba962912016-12-21 18:55:02 +01002071#endif
2072#if defined(IP_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002073 " IP_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002074#endif
2075#if defined(IPV6_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002076 " IPV6_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002077#endif
2078#if defined(SO_BINDANY)
Willy Tarreau80713382018-11-26 10:19:54 +01002079 " SO_BINDANY"
Willy Tarreauba962912016-12-21 18:55:02 +01002080#endif
Willy Tarreau80713382018-11-26 10:19:54 +01002081 "");
Willy Tarreaue6b98942007-10-29 01:09:36 +01002082
2083
2084/*
2085 * Local variables:
2086 * c-indent-level: 8
2087 * c-basic-offset: 8
2088 * End:
2089 */