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Willy Tarreaue6b98942007-10-29 01:09:36 +01001/*
2 * AF_INET/AF_INET6 SOCK_STREAM protocol layer (tcp)
3 *
Willy Tarreaud4c33c82013-01-07 21:59:07 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaue6b98942007-10-29 01:09:36 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
Baptiste Assmann39a5f222016-08-08 14:12:08 +020013/* this is to have tcp_info defined on systems using musl
14 * library, such as Alpine Linux
15 */
16#define _GNU_SOURCE
17
Willy Tarreaue6b98942007-10-29 01:09:36 +010018#include <ctype.h>
19#include <errno.h>
20#include <fcntl.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <time.h>
25
26#include <sys/param.h>
27#include <sys/socket.h>
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 Tarreaue6b98942007-10-29 01:09:36 +010039#include <common/mini-clist.h>
40#include <common/standard.h>
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +010041#include <common/namespace.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010042
Willy Tarreau39713102016-11-25 15:49:32 +010043#include <types/action.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020044#include <types/connection.h>
Willy Tarreau39713102016-11-25 15:49:32 +010045#include <types/global.h>
46#include <types/stream.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010047
Willy Tarreau9fcb9842012-04-20 14:45:49 +020048#include <proto/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020049#include <proto/channel.h>
Willy Tarreaud2274c62012-07-06 14:29:45 +020050#include <proto/connection.h>
Willy Tarreaudd2f85e2012-09-02 22:34:23 +020051#include <proto/fd.h>
Willy Tarreau61c112a2018-10-02 16:43:32 +020052#include <proto/http_rules.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020053#include <proto/listener.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020054#include <proto/log.h>
55#include <proto/port_range.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020056#include <proto/protocol.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020057#include <proto/proto_http.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010058#include <proto/proto_tcp.h>
Willy Tarreaub6866442008-07-14 23:54:42 +020059#include <proto/proxy.h>
Willy Tarreaucd3b0942012-04-27 21:52:18 +020060#include <proto/sample.h>
Willy Tarreau163d4622015-10-13 16:16:41 +020061#include <proto/server.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020062#include <proto/task.h>
Willy Tarreau39713102016-11-25 15:49:32 +010063#include <proto/tcp_rules.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010064
Emeric Bruncf20bf12010-10-22 16:06:11 +020065static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
66static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020067static void tcpv4_add_listener(struct listener *listener, int port);
68static void tcpv6_add_listener(struct listener *listener, int port);
Willy Tarreaue6b98942007-10-29 01:09:36 +010069
70/* Note: must not be declared <const> as its list will be overwritten */
71static struct protocol proto_tcpv4 = {
72 .name = "tcpv4",
73 .sock_domain = AF_INET,
74 .sock_type = SOCK_STREAM,
75 .sock_prot = IPPROTO_TCP,
76 .sock_family = AF_INET,
77 .sock_addrlen = sizeof(struct sockaddr_in),
78 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020079 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020080 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020081 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010082 .bind_all = tcp_bind_listeners,
83 .unbind_all = unbind_all_listeners,
84 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020085 .get_src = tcp_get_src,
86 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +020087 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020088 .add = tcpv4_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010089 .listeners = LIST_HEAD_INIT(proto_tcpv4.listeners),
90 .nb_listeners = 0,
91};
92
93/* Note: must not be declared <const> as its list will be overwritten */
94static struct protocol proto_tcpv6 = {
95 .name = "tcpv6",
96 .sock_domain = AF_INET6,
97 .sock_type = SOCK_STREAM,
98 .sock_prot = IPPROTO_TCP,
99 .sock_family = AF_INET6,
100 .sock_addrlen = sizeof(struct sockaddr_in6),
101 .l3_addrlen = 128/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +0200102 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +0200103 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +0200104 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100105 .bind_all = tcp_bind_listeners,
106 .unbind_all = unbind_all_listeners,
107 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +0200108 .get_src = tcp_get_src,
109 .get_dst = tcp_get_dst,
Willy Tarreau092d8652014-07-07 20:22:12 +0200110 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +0200111 .add = tcpv6_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100112 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
113 .nb_listeners = 0,
114};
115
Olivier Houchard153659f2017-04-05 22:39:56 +0200116/* Default TCP parameters, got by opening a temporary TCP socket. */
117#ifdef TCP_MAXSEG
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100118static THREAD_LOCAL int default_tcp_maxseg = -1;
119static THREAD_LOCAL int default_tcp6_maxseg = -1;
Olivier Houchard153659f2017-04-05 22:39:56 +0200120#endif
121
David du Colombier6f5ccb12011-03-10 22:26:24 +0100122/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100123 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
124 * - 0 : ignore remote address (may even be a NULL pointer)
125 * - 1 : use provided address
126 * - 2 : use provided port
127 * - 3 : use both
128 *
129 * The function supports multiple foreign binding methods :
130 * - linux_tproxy: we directly bind to the foreign address
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100131 * The second one can be used as a fallback for the first one.
132 * This function returns 0 when everything's OK, 1 if it could not bind, to the
133 * local address, 2 if it could not bind to the foreign address.
134 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100135int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100136{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100137 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100138 int foreign_ok = 0;
139 int ret;
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100140 static THREAD_LOCAL int ip_transp_working = 1;
141 static THREAD_LOCAL int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200142
David du Colombier65c17962012-07-13 14:34:59 +0200143 switch (local->ss_family) {
144 case AF_INET:
145 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200146 /* This deserves some explanation. Some platforms will support
147 * multiple combinations of certain methods, so we try the
148 * supported ones until one succeeds.
149 */
150 if (0
151#if defined(IP_TRANSPARENT)
152 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
153#endif
154#if defined(IP_FREEBIND)
155 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
156#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200157#if defined(IP_BINDANY)
158 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
159#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200160#if defined(SO_BINDANY)
161 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
162#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200163 )
David du Colombier65c17962012-07-13 14:34:59 +0200164 foreign_ok = 1;
165 else
166 ip_transp_working = 0;
167 }
168 break;
169 case AF_INET6:
170 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200171 if (0
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200172#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200173 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
174#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100175#if defined(IP_FREEBIND)
176 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
177#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200178#if defined(IPV6_BINDANY)
179 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
180#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200181#if defined(SO_BINDANY)
182 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
183#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200184 )
David du Colombier65c17962012-07-13 14:34:59 +0200185 foreign_ok = 1;
186 else
187 ip6_transp_working = 0;
188 }
189 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100190 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200191
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100192 if (flags) {
193 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200194 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100195 switch (remote->ss_family) {
196 case AF_INET:
197 if (flags & 1)
198 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
199 if (flags & 2)
200 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
201 break;
202 case AF_INET6:
203 if (flags & 1)
204 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
205 if (flags & 2)
206 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
207 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100208 default:
209 /* we don't want to try to bind to an unknown address family */
210 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100211 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100212 }
213
Simon Hormande072bd2011-06-24 15:11:37 +0900214 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100215 if (foreign_ok) {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200216 if (is_inet_addr(&bind_addr)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200217 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
218 if (ret < 0)
219 return 2;
220 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100221 }
222 else {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200223 if (is_inet_addr(local)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200224 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
225 if (ret < 0)
226 return 1;
227 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100228 }
229
230 if (!flags)
231 return 0;
232
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100233 if (!foreign_ok)
234 /* we could not bind to a foreign address */
235 return 2;
236
237 return 0;
238}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100239
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100240static int create_server_socket(struct connection *conn)
241{
Willy Tarreau529c1392014-12-24 13:47:55 +0100242 const struct netns_entry *ns = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100243
Willy Tarreau529c1392014-12-24 13:47:55 +0100244#ifdef CONFIG_HAP_NS
245 if (objt_server(conn->target)) {
246 if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
247 ns = conn->proxy_netns;
248 else
249 ns = __objt_server(conn->target)->netns;
250 }
251#endif
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100252 return my_socketat(ns, conn->addr.to.ss_family, SOCK_STREAM, IPPROTO_TCP);
253}
Willy Tarreau9650f372009-08-16 14:02:45 +0200254
255/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200256 * This function initiates a TCP connection establishment to the target assigned
257 * to connection <conn> using (si->{target,addr.to}). A source address may be
258 * pointed to by conn->addr.from in case of transparent proxying. Normal source
259 * bind addresses are still determined locally (due to the possible need of a
260 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100261 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100262 * supported. The <data> parameter is a boolean indicating whether there are data
263 * waiting for being sent or not, in order to adjust data write polling and on
264 * some platforms, the ability to avoid an empty initial ACK. The <delack> argument
265 * allows the caller to force using a delayed ACK when establishing the connection :
266 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
267 * - 1 = delayed ACK if backend has tcp-smart-connect, regardless of data
268 * - 2 = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200269 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200270 * Note that a pending send_proxy message accounts for data.
271 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200272 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +0200273 * - SF_ERR_NONE if everything's OK
274 * - SF_ERR_SRVTO if there are no more servers
275 * - SF_ERR_SRVCL if the connection was refused by the server
276 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
277 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
278 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +0100279 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100280 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200281 * The connection's fd is inserted only when SF_ERR_NONE is returned, otherwise
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100282 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200283 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100284
Willy Tarreauf0837b22012-11-24 10:24:27 +0100285int tcp_connect_server(struct connection *conn, int data, int delack)
Willy Tarreau9650f372009-08-16 14:02:45 +0200286{
287 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100288 struct server *srv;
289 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100290 struct conn_src *src;
Willy Tarreauac825402011-03-04 22:04:29 +0100291
Willy Tarreau9ce70132014-01-24 16:08:19 +0100292 conn->flags = CO_FL_WAIT_L4_CONN; /* connection in progress */
293
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100294 switch (obj_type(conn->target)) {
295 case OBJ_TYPE_PROXY:
296 be = objt_proxy(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100297 srv = NULL;
298 break;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100299 case OBJ_TYPE_SERVER:
300 srv = objt_server(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100301 be = srv->proxy;
302 break;
303 default:
Willy Tarreau9ce70132014-01-24 16:08:19 +0100304 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200305 return SF_ERR_INTERNAL;
Willy Tarreauac825402011-03-04 22:04:29 +0100306 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200307
Willy Tarreau585744b2017-08-24 14:31:19 +0200308 fd = conn->handle.fd = create_server_socket(conn);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100309
310 if (fd == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200311 qfprintf(stderr, "Cannot get a server socket.\n");
312
Willy Tarreau9ce70132014-01-24 16:08:19 +0100313 if (errno == ENFILE) {
314 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200315 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100316 "Proxy %s reached system FD limit (maxsock=%d). Please check system tunables.\n",
317 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100318 }
319 else if (errno == EMFILE) {
320 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200321 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100322 "Proxy %s reached process FD limit (maxsock=%d). Please check 'ulimit-n' and restart.\n",
323 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100324 }
325 else if (errno == ENOBUFS || errno == ENOMEM) {
326 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200327 send_log(be, LOG_EMERG,
Willy Tarreauc5532ac2018-01-29 15:06:04 +0100328 "Proxy %s reached system memory limit (maxsock=%d). Please check system tunables.\n",
329 be->id, global.maxsock);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100330 }
331 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
332 conn->err_code = CO_ER_NOPROTO;
333 }
334 else
335 conn->err_code = CO_ER_SOCK_ERR;
336
Willy Tarreau9650f372009-08-16 14:02:45 +0200337 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100338 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200339 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200340 }
341
342 if (fd >= global.maxsock) {
343 /* do not log anything there, it's a normal condition when this option
344 * is used to serialize connections to a server !
345 */
Christopher Faulet767a84b2017-11-24 16:50:31 +0100346 ha_alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
Willy Tarreau9650f372009-08-16 14:02:45 +0200347 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100348 conn->err_code = CO_ER_CONF_FDLIM;
349 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200350 return SF_ERR_PRXCOND; /* it is a configuration limit */
Willy Tarreau9650f372009-08-16 14:02:45 +0200351 }
352
353 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900354 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200355 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
356 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100357 conn->err_code = CO_ER_SOCK_ERR;
358 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200359 return SF_ERR_INTERNAL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200360 }
361
362 if (be->options & PR_O_TCP_SRV_KA)
Simon Hormande072bd2011-06-24 15:11:37 +0900363 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200364
Willy Tarreau9650f372009-08-16 14:02:45 +0200365 /* allow specific binding :
366 * - server-specific at first
367 * - proxy-specific next
368 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100369 if (srv && srv->conn_src.opts & CO_SRC_BIND)
370 src = &srv->conn_src;
371 else if (be->conn_src.opts & CO_SRC_BIND)
372 src = &be->conn_src;
373 else
374 src = NULL;
375
376 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200377 int ret, flags = 0;
378
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200379 if (is_inet_addr(&conn->addr.from)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100380 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100381 case CO_SRC_TPROXY_CLI:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200382 conn->flags |= CO_FL_PRIVATE;
383 /* fall through */
384 case CO_SRC_TPROXY_ADDR:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200385 flags = 3;
386 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100387 case CO_SRC_TPROXY_CIP:
388 case CO_SRC_TPROXY_DYN:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200389 conn->flags |= CO_FL_PRIVATE;
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200390 flags = 1;
391 break;
392 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200393 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200394
Willy Tarreau9650f372009-08-16 14:02:45 +0200395#ifdef SO_BINDTODEVICE
396 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100397 if (src->iface_name)
398 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200399#endif
400
Willy Tarreaua4380b42012-12-08 22:49:11 +0100401 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200402 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100403 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200404
405 ret = 1;
Vincent Bernat6e615892016-05-18 16:17:44 +0200406 memcpy(&sa, &src->source_addr, sizeof(sa));
Willy Tarreau9650f372009-08-16 14:02:45 +0200407
408 do {
409 /* note: in case of retry, we may have to release a previously
410 * allocated port, hence this loop's construct.
411 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200412 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
413 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200414
415 if (!attempts)
416 break;
417 attempts--;
418
Willy Tarreaua4380b42012-12-08 22:49:11 +0100419 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100420 if (!fdinfo[fd].local_port) {
421 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200422 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100423 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200424
Willy Tarreaua4380b42012-12-08 22:49:11 +0100425 fdinfo[fd].port_range = src->sport_range;
426 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200427
Willy Tarreaua4380b42012-12-08 22:49:11 +0100428 ret = tcp_bind_socket(fd, flags, &sa, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100429 if (ret != 0)
430 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200431 } while (ret != 0); /* binding NOK */
432 }
433 else {
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000434#ifdef IP_BIND_ADDRESS_NO_PORT
Christopher Faulet1bc04c72017-10-29 20:14:08 +0100435 static THREAD_LOCAL int bind_address_no_port = 1;
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000436 setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
437#endif
Willy Tarreaua4380b42012-12-08 22:49:11 +0100438 ret = tcp_bind_socket(fd, flags, &src->source_addr, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100439 if (ret != 0)
440 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200441 }
442
Willy Tarreaua4380b42012-12-08 22:49:11 +0100443 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200444 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
445 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200446 close(fd);
447
Willy Tarreau9650f372009-08-16 14:02:45 +0200448 if (ret == 1) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100449 ha_alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
450 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200451 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100452 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200453 be->id);
454 } else {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100455 ha_alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
456 be->id);
Willy Tarreau9650f372009-08-16 14:02:45 +0200457 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100458 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200459 be->id);
460 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100461 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200462 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200463 }
464 }
465
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400466#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200467 /* disabling tcp quick ack now allows the first request to leave the
468 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100469 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200470 */
Willy Tarreaufb20e462014-10-24 12:02:24 +0200471 if (delack == 2 || ((delack || data || conn->send_proxy_ofs) && (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900472 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200473#endif
474
Willy Tarreau163d4622015-10-13 16:16:41 +0200475#ifdef TCP_USER_TIMEOUT
476 /* there is not much more we can do here when it fails, it's still minor */
477 if (srv && srv->tcp_ut)
478 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &srv->tcp_ut, sizeof(srv->tcp_ut));
479#endif
Willy Tarreaue803de22010-01-21 17:43:04 +0100480 if (global.tune.server_sndbuf)
481 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
482
483 if (global.tune.server_rcvbuf)
484 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
485
Willy Tarreau819efbf2017-01-25 14:12:22 +0100486 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) == -1) {
487 if (errno == EINPROGRESS || errno == EALREADY) {
488 /* common case, let's wait for connect status */
489 conn->flags |= CO_FL_WAIT_L4_CONN;
490 }
491 else if (errno == EISCONN) {
492 /* should normally not happen but if so, indicates that it's OK */
493 conn->flags &= ~CO_FL_WAIT_L4_CONN;
494 }
495 else if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200496 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100497 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200498 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100499 conn->err_code = CO_ER_FREE_PORTS;
500 }
501 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200502 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100503 conn->err_code = CO_ER_ADDR_INUSE;
504 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200505
Willy Tarreaub1719512012-12-08 23:03:28 +0100506 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200507 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
508 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200509 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100510 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100511 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200512 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200513 } else if (errno == ETIMEDOUT) {
514 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200515 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
516 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200517 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100518 conn->err_code = CO_ER_SOCK_ERR;
519 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200520 return SF_ERR_SRVTO;
Willy Tarreau9650f372009-08-16 14:02:45 +0200521 } else {
522 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
523 //qfprintf(stderr,"Connect(): %d", errno);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200524 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
525 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200526 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100527 conn->err_code = CO_ER_SOCK_ERR;
528 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200529 return SF_ERR_SRVCL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200530 }
531 }
Willy Tarreau819efbf2017-01-25 14:12:22 +0100532 else {
533 /* connect() == 0, this is great! */
534 conn->flags &= ~CO_FL_WAIT_L4_CONN;
535 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200536
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100537 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200538
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200539 /* Prepare to send a few handshakes related to the on-wire protocol. */
540 if (conn->send_proxy_ofs)
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200541 conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200542
Willy Tarreauf79c8172013-10-21 16:30:56 +0200543 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100544 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200545
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200546 if (conn_xprt_init(conn) < 0) {
Willy Tarreau3f2770b2017-10-05 18:01:29 +0200547 conn_full_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100548 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200549 return SF_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200550 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200551
Olivier Houchardc2aae742017-09-22 18:26:28 +0200552 if (conn->flags & (CO_FL_HANDSHAKE | CO_FL_WAIT_L4_CONN | CO_FL_EARLY_SSL_HS)) {
Willy Tarreau819efbf2017-01-25 14:12:22 +0100553 conn_sock_want_send(conn); /* for connect status, proxy protocol or SSL */
Olivier Houchardc2aae742017-09-22 18:26:28 +0200554 if (conn->flags & CO_FL_EARLY_SSL_HS)
555 conn_xprt_want_send(conn);
Willy Tarreau819efbf2017-01-25 14:12:22 +0100556 }
557 else {
558 /* If there's no more handshake, we need to notify the data
559 * layer when the connection is already OK otherwise we'll have
560 * no other opportunity to do it later (eg: health checks).
561 */
562 data = 1;
563 }
564
Willy Tarreau14f8e862012-08-30 22:23:13 +0200565 if (data)
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200566 conn_xprt_want_send(conn); /* prepare to send data if any */
Willy Tarreau9650f372009-08-16 14:02:45 +0200567
Willy Tarreaue7dff022015-04-03 01:14:29 +0200568 return SF_ERR_NONE; /* connection is OK */
Willy Tarreau9650f372009-08-16 14:02:45 +0200569}
570
571
Willy Tarreau59b94792012-05-11 16:16:40 +0200572/*
573 * Retrieves the source address for the socket <fd>, with <dir> indicating
574 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
575 * success, -1 in case of error. The socket's source address is stored in
576 * <sa> for <salen> bytes.
577 */
578int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
579{
580 if (dir)
581 return getsockname(fd, sa, &salen);
582 else
583 return getpeername(fd, sa, &salen);
584}
585
586
587/*
588 * Retrieves the original destination address for the socket <fd>, with <dir>
589 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
590 * listener, if the original destination address was translated, the original
591 * address is retrieved. It returns 0 in case of success, -1 in case of error.
592 * The socket's source address is stored in <sa> for <salen> bytes.
593 */
594int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
595{
596 if (dir)
597 return getpeername(fd, sa, &salen);
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100598 else {
599 int ret = getsockname(fd, sa, &salen);
600
601 if (ret < 0)
602 return ret;
603
Willy Tarreau59b94792012-05-11 16:16:40 +0200604#if defined(TPROXY) && defined(SO_ORIGINAL_DST)
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100605 /* For TPROXY and Netfilter's NAT, we can retrieve the original
606 * IPv4 address before DNAT/REDIRECT. We must not do that with
607 * other families because v6-mapped IPv4 addresses are still
608 * reported as v4.
609 */
610 if (((struct sockaddr_storage *)sa)->ss_family == AF_INET
611 && getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
612 return 0;
Willy Tarreau59b94792012-05-11 16:16:40 +0200613#endif
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100614 return ret;
615 }
Willy Tarreau59b94792012-05-11 16:16:40 +0200616}
617
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200618/* This is the callback which is set when a connection establishment is pending
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100619 * and we have nothing to send. It updates the FD polling status. It returns 0
620 * if it fails in a fatal way or needs to poll to go further, otherwise it
621 * returns non-zero and removes the CO_FL_WAIT_L4_CONN flag from the connection's
622 * flags. In case of error, it sets CO_FL_ERROR and leaves the error code in
623 * errno. The error checking is done in two passes in order to limit the number
624 * of syscalls in the normal case :
625 * - if POLL_ERR was reported by the poller, we check for a pending error on
626 * the socket before proceeding. If found, it's assigned to errno so that
627 * upper layers can see it.
628 * - otherwise connect() is used to check the connection state again, since
629 * the getsockopt return cannot reliably be used to know if the connection
630 * is still pending or ready. This one may often return an error as well,
631 * since we don't always have POLL_ERR (eg: OSX or cached events).
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200632 */
Willy Tarreau239d7182012-07-23 18:53:03 +0200633int tcp_connect_probe(struct connection *conn)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200634{
Willy Tarreau585744b2017-08-24 14:31:19 +0200635 int fd = conn->handle.fd;
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100636 socklen_t lskerr;
637 int skerr;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200638
Willy Tarreau80184712012-07-06 14:54:49 +0200639 if (conn->flags & CO_FL_ERROR)
Willy Tarreauafad0e02012-08-09 14:45:22 +0200640 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200641
Willy Tarreau3c728722014-01-23 13:50:42 +0100642 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200643 return 0;
644
Willy Tarreau80184712012-07-06 14:54:49 +0200645 if (!(conn->flags & CO_FL_WAIT_L4_CONN))
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200646 return 1; /* strange we were called while ready */
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200647
Willy Tarreaufd803bb2014-01-20 15:13:07 +0100648 if (!fd_send_ready(fd))
649 return 0;
650
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100651 /* we might be the first witness of FD_POLL_ERR. Note that FD_POLL_HUP
652 * without FD_POLL_IN also indicates a hangup without input data meaning
653 * there was no connection.
654 */
655 if (fdtab[fd].ev & FD_POLL_ERR ||
656 (fdtab[fd].ev & (FD_POLL_IN|FD_POLL_HUP)) == FD_POLL_HUP) {
657 skerr = 0;
658 lskerr = sizeof(skerr);
659 getsockopt(fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr);
660 errno = skerr;
661 if (errno == EAGAIN)
662 errno = 0;
663 if (errno)
664 goto out_error;
665 }
Willy Tarreau2da156f2012-07-23 15:07:23 +0200666
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100667 /* Use connect() to check the state of the socket. This has the
668 * advantage of giving us the following info :
Willy Tarreau2c6be842012-07-06 17:12:34 +0200669 * - error
670 * - connecting (EALREADY, EINPROGRESS)
671 * - connected (EISCONN, 0)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200672 */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200673 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) < 0) {
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200674 if (errno == EALREADY || errno == EINPROGRESS) {
Willy Tarreaud486ef52012-12-10 17:03:52 +0100675 __conn_sock_stop_recv(conn);
Willy Tarreaue1f50c42014-01-22 20:02:06 +0100676 fd_cant_send(fd);
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200677 return 0;
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200678 }
Willy Tarreaua190d592012-05-20 18:35:19 +0200679
Willy Tarreau2c6be842012-07-06 17:12:34 +0200680 if (errno && errno != EISCONN)
Willy Tarreaua190d592012-05-20 18:35:19 +0200681 goto out_error;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200682
Willy Tarreau2c6be842012-07-06 17:12:34 +0200683 /* otherwise we're connected */
Willy Tarreaua190d592012-05-20 18:35:19 +0200684 }
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200685
Willy Tarreau076be252012-07-06 16:02:29 +0200686 /* The FD is ready now, we'll mark the connection as complete and
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200687 * forward the event to the transport layer which will notify the
688 * data layer.
Willy Tarreaua190d592012-05-20 18:35:19 +0200689 */
Willy Tarreau80184712012-07-06 14:54:49 +0200690 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200691 return 1;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200692
693 out_error:
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200694 /* Write error on the file descriptor. Report it to the connection
695 * and disable polling on this FD.
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200696 */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100697 fdtab[fd].linger_risk = 0;
Willy Tarreau26f4a042013-12-04 23:44:10 +0100698 conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH;
Willy Tarreaud486ef52012-12-10 17:03:52 +0100699 __conn_sock_stop_both(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200700 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200701}
702
Olivier Houchard153659f2017-04-05 22:39:56 +0200703/* XXX: Should probably be elsewhere */
704static int compare_sockaddr(struct sockaddr_storage *a, struct sockaddr_storage *b)
705{
706 if (a->ss_family != b->ss_family) {
707 return (-1);
708 }
709 switch (a->ss_family) {
710 case AF_INET:
711 {
712 struct sockaddr_in *a4 = (void *)a, *b4 = (void *)b;
713 if (a4->sin_port != b4->sin_port)
714 return (-1);
715 return (memcmp(&a4->sin_addr, &b4->sin_addr,
716 sizeof(a4->sin_addr)));
717 }
718 case AF_INET6:
719 {
720 struct sockaddr_in6 *a6 = (void *)a, *b6 = (void *)b;
721 if (a6->sin6_port != b6->sin6_port)
722 return (-1);
723 return (memcmp(&a6->sin6_addr, &b6->sin6_addr,
724 sizeof(a6->sin6_addr)));
725 }
726 default:
727 return (-1);
728 }
729
730}
731
732#define LI_MANDATORY_FLAGS (LI_O_FOREIGN | LI_O_V6ONLY | LI_O_V4V6)
733/* When binding the listeners, check if a socket has been sent to us by the
734 * previous process that we could reuse, instead of creating a new one.
735 */
736static int tcp_find_compatible_fd(struct listener *l)
737{
738 struct xfer_sock_list *xfer_sock = xfer_sock_list;
739 int ret = -1;
740
741 while (xfer_sock) {
742 if (!compare_sockaddr(&xfer_sock->addr, &l->addr)) {
743 if ((l->interface == NULL && xfer_sock->iface == NULL) ||
744 (l->interface != NULL && xfer_sock->iface != NULL &&
745 !strcmp(l->interface, xfer_sock->iface))) {
746 if ((l->options & LI_MANDATORY_FLAGS) ==
747 (xfer_sock->options & LI_MANDATORY_FLAGS)) {
748 if ((xfer_sock->namespace == NULL &&
749 l->netns == NULL)
750#ifdef CONFIG_HAP_NS
751 || (xfer_sock->namespace != NULL &&
752 l->netns != NULL &&
753 !strcmp(xfer_sock->namespace,
754 l->netns->node.key))
755#endif
756 ) {
757 break;
758 }
759
760 }
761 }
762 }
763 xfer_sock = xfer_sock->next;
764 }
765 if (xfer_sock != NULL) {
766 ret = xfer_sock->fd;
767 if (xfer_sock == xfer_sock_list)
768 xfer_sock_list = xfer_sock->next;
769 if (xfer_sock->prev)
770 xfer_sock->prev->next = xfer_sock->next;
771 if (xfer_sock->next)
772 xfer_sock->next->prev = xfer_sock->prev;
773 free(xfer_sock->iface);
774 free(xfer_sock->namespace);
775 free(xfer_sock);
776 }
777 return ret;
778}
779#undef L1_MANDATORY_FLAGS
Willy Tarreau59b94792012-05-11 16:16:40 +0200780
Willy Tarreaue6b98942007-10-29 01:09:36 +0100781/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100782 * an error message in <errmsg> if the message is at most <errlen> bytes long
783 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
784 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100785 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
786 * was alright and that no message was returned. ERR_RETRYABLE means that an
787 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700788 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100789 * the meaning of the error, but just indicate that a message is present which
790 * should be displayed with the respective level. Last, ERR_ABORT indicates
791 * that it's pointless to try to start other listeners. No error message is
792 * returned if errlen is NULL.
793 */
794int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
795{
796 __label__ tcp_return, tcp_close_return;
797 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100798 int ext, ready;
799 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100800 const char *msg = NULL;
Olivier Houchard153659f2017-04-05 22:39:56 +0200801#ifdef TCP_MAXSEG
802
803 /* Create a temporary TCP socket to get default parameters we can't
804 * guess.
805 * */
806 ready_len = sizeof(default_tcp_maxseg);
807 if (default_tcp_maxseg == -1) {
808 default_tcp_maxseg = -2;
809 fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
810 if (fd < 0)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100811 ha_warning("Failed to create a temporary socket!\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200812 else {
813 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp_maxseg,
814 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100815 ha_warning("Failed to get the default value of TCP_MAXSEG\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200816 }
817 close(fd);
818 }
819 if (default_tcp6_maxseg == -1) {
820 default_tcp6_maxseg = -2;
821 fd = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
822 if (fd >= 0) {
823 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp6_maxseg,
824 &ready_len) == -1)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100825 ha_warning("Failed ot get the default value of TCP_MAXSEG for IPv6\n");
Olivier Houchard153659f2017-04-05 22:39:56 +0200826 close(fd);
827 }
828 }
829#endif
830
Willy Tarreaue6b98942007-10-29 01:09:36 +0100831
832 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100833 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100834 *errmsg = 0;
835
836 if (listener->state != LI_ASSIGNED)
837 return ERR_NONE; /* already bound */
838
839 err = ERR_NONE;
840
Olivier Houchard153659f2017-04-05 22:39:56 +0200841 if (listener->fd == -1)
842 listener->fd = tcp_find_compatible_fd(listener);
843
Willy Tarreau40aa0702013-03-10 23:51:38 +0100844 /* if the listener already has an fd assigned, then we were offered the
845 * fd by an external process (most likely the parent), and we don't want
846 * to create a new socket. However we still want to set a few flags on
847 * the socket.
848 */
849 fd = listener->fd;
850 ext = (fd >= 0);
851
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100852 if (!ext) {
853 fd = my_socketat(listener->netns, listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
854
855 if (fd == -1) {
856 err |= ERR_RETRYABLE | ERR_ALERT;
857 msg = "cannot create listening socket";
858 goto tcp_return;
859 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100860 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100861
Willy Tarreaue6b98942007-10-29 01:09:36 +0100862 if (fd >= global.maxsock) {
863 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
864 msg = "not enough free sockets (raise '-n' parameter)";
865 goto tcp_close_return;
866 }
867
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200868 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100869 err |= ERR_FATAL | ERR_ALERT;
870 msg = "cannot make socket non-blocking";
871 goto tcp_close_return;
872 }
873
Willy Tarreau40aa0702013-03-10 23:51:38 +0100874 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100875 /* not fatal but should be reported */
876 msg = "cannot do so_reuseaddr";
877 err |= ERR_ALERT;
878 }
879
880 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900881 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Olivier Houchard153659f2017-04-05 22:39:56 +0200882 else {
883 struct linger tmplinger;
884 socklen_t len = sizeof(tmplinger);
885 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger, &len) == 0 &&
886 (tmplinger.l_onoff == 1 || tmplinger.l_linger == 0)) {
887 tmplinger.l_onoff = 0;
888 tmplinger.l_linger = 0;
889 setsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger,
890 sizeof(tmplinger));
891 }
892 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100893
Willy Tarreaue6b98942007-10-29 01:09:36 +0100894#ifdef SO_REUSEPORT
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000895 /* OpenBSD and Linux 3.9 support this. As it's present in old libc versions of
896 * Linux, it might return an error that we will silently ignore.
Willy Tarreaue6b98942007-10-29 01:09:36 +0100897 */
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000898 if (!ext && (global.tune.options & GTUNE_USE_REUSEPORT))
Willy Tarreau40aa0702013-03-10 23:51:38 +0100899 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100900#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200901
Willy Tarreau40aa0702013-03-10 23:51:38 +0100902 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200903 switch (listener->addr.ss_family) {
904 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200905 if (1
906#if defined(IP_TRANSPARENT)
907 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
908#endif
909#if defined(IP_FREEBIND)
910 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
911#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200912#if defined(IP_BINDANY)
913 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
914#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200915#if defined(SO_BINDANY)
916 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
917#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200918 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200919 msg = "cannot make listening socket transparent";
920 err |= ERR_ALERT;
921 }
922 break;
923 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200924 if (1
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200925#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200926 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
927#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100928#if defined(IP_FREEBIND)
929 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
930#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200931#if defined(IPV6_BINDANY)
932 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
933#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200934#if defined(SO_BINDANY)
935 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
936#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200937 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200938 msg = "cannot make listening socket transparent";
939 err |= ERR_ALERT;
940 }
941 break;
942 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100943 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200944
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100945#ifdef SO_BINDTODEVICE
946 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100947 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100948 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100949 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100950 msg = "cannot bind listener to device";
951 err |= ERR_WARN;
952 }
953 }
954#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400955#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100956 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400957 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200958 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
959 msg = "cannot set MSS";
960 err |= ERR_WARN;
961 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200962 } else if (ext) {
963 int tmpmaxseg = -1;
964 int defaultmss;
965 socklen_t len = sizeof(tmpmaxseg);
966
967 if (listener->addr.ss_family == AF_INET)
968 defaultmss = default_tcp_maxseg;
969 else
970 defaultmss = default_tcp6_maxseg;
971
972 getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &tmpmaxseg, &len);
973 if (tmpmaxseg != defaultmss && setsockopt(fd, IPPROTO_TCP,
974 TCP_MAXSEG, &defaultmss,
975 sizeof(defaultmss)) == -1) {
976 msg = "cannot set MSS";
977 err |= ERR_WARN;
978 }
Willy Tarreaube1b9182009-06-14 18:48:19 +0200979 }
980#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +0100981#if defined(TCP_USER_TIMEOUT)
982 if (listener->tcp_ut) {
983 if (setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT,
984 &listener->tcp_ut, sizeof(listener->tcp_ut)) == -1) {
985 msg = "cannot set TCP User Timeout";
986 err |= ERR_WARN;
987 }
Olivier Houchard153659f2017-04-05 22:39:56 +0200988 } else
989 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &zero,
990 sizeof(zero));
Willy Tarreau2af207a2015-02-04 00:45:58 +0100991#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200992#if defined(TCP_DEFER_ACCEPT)
993 if (listener->options & LI_O_DEF_ACCEPT) {
994 /* defer accept by up to one second */
995 int accept_delay = 1;
996 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
997 msg = "cannot enable DEFER_ACCEPT";
998 err |= ERR_WARN;
999 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001000 } else
1001 setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &zero,
1002 sizeof(zero));
Willy Tarreaucb6cd432009-10-13 07:34:14 +02001003#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001004#if defined(TCP_FASTOPEN)
1005 if (listener->options & LI_O_TCP_FO) {
1006 /* TFO needs a queue length, let's use the configured backlog */
1007 int qlen = listener->backlog ? listener->backlog : listener->maxconn;
1008 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
1009 msg = "cannot enable TCP_FASTOPEN";
1010 err |= ERR_WARN;
1011 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001012 } else {
1013 socklen_t len;
1014 int qlen;
1015 len = sizeof(qlen);
1016 /* Only disable fast open if it was enabled, we don't want
1017 * the kernel to create a fast open queue if there's none.
1018 */
1019 if (getsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, &len) == 0 &&
1020 qlen != 0) {
1021 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &zero,
1022 sizeof(zero)) == -1) {
1023 msg = "cannot disable TCP_FASTOPEN";
1024 err |= ERR_WARN;
1025 }
1026 }
Willy Tarreau1c862c52012-10-05 16:21:00 +02001027 }
1028#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001029#if defined(IPV6_V6ONLY)
1030 if (listener->options & LI_O_V6ONLY)
1031 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +01001032 else if (listener->options & LI_O_V4V6)
1033 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001034#endif
1035
Willy Tarreau40aa0702013-03-10 23:51:38 +01001036 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +01001037 err |= ERR_RETRYABLE | ERR_ALERT;
1038 msg = "cannot bind socket";
1039 goto tcp_close_return;
1040 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001041
Willy Tarreau40aa0702013-03-10 23:51:38 +01001042 ready = 0;
1043 ready_len = sizeof(ready);
1044 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
1045 ready = 0;
1046
1047 if (!(ext && ready) && /* only listen if not already done by external process */
1048 listen(fd, listener->backlog ? listener->backlog : listener->maxconn) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +01001049 err |= ERR_RETRYABLE | ERR_ALERT;
1050 msg = "cannot listen to socket";
1051 goto tcp_close_return;
1052 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001053
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +04001054#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001055 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +09001056 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Olivier Houchard153659f2017-04-05 22:39:56 +02001057 else
1058 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001059#endif
1060
Willy Tarreaue6b98942007-10-29 01:09:36 +01001061 /* the socket is ready */
1062 listener->fd = fd;
1063 listener->state = LI_LISTEN;
1064
Willy Tarreaua9786b62018-01-25 07:22:13 +01001065 fd_insert(fd, listener, listener->proto->accept,
1066 listener->bind_conf->bind_thread[relative_pid-1] ?
1067 listener->bind_conf->bind_thread[relative_pid-1] : MAX_THREADS_MASK);
Willy Tarreaueb472682010-05-28 18:46:57 +02001068
Willy Tarreaue6b98942007-10-29 01:09:36 +01001069 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001070 if (msg && errlen) {
1071 char pn[INET6_ADDRSTRLEN];
1072
Willy Tarreau631f01c2011-09-05 00:36:48 +02001073 addr_to_str(&listener->addr, pn, sizeof(pn));
1074 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001075 }
Willy Tarreaue6b98942007-10-29 01:09:36 +01001076 return err;
1077
1078 tcp_close_return:
1079 close(fd);
1080 goto tcp_return;
1081}
1082
1083/* This function creates all TCP sockets bound to the protocol entry <proto>.
1084 * It is intended to be used as the protocol's bind_all() function.
1085 * The sockets will be registered but not added to any fd_set, in order not to
1086 * loose them across the fork(). A call to enable_all_listeners() is needed
1087 * to complete initialization. The return value is composed from ERR_*.
1088 */
Emeric Bruncf20bf12010-10-22 16:06:11 +02001089static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001090{
1091 struct listener *listener;
1092 int err = ERR_NONE;
1093
1094 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +02001095 err |= tcp_bind_listener(listener, errmsg, errlen);
1096 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001097 break;
1098 }
1099
1100 return err;
1101}
1102
Willy Tarreau32282382017-09-15 07:44:44 +02001103/* Add <listener> to the list of tcpv4 listeners, on port <port>. The
1104 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1105 * The number of listeners for the protocol is updated.
Willy Tarreaue6b98942007-10-29 01:09:36 +01001106 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001107static void tcpv4_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001108{
1109 if (listener->state != LI_INIT)
1110 return;
1111 listener->state = LI_ASSIGNED;
1112 listener->proto = &proto_tcpv4;
Willy Tarreau32282382017-09-15 07:44:44 +02001113 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001114 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
1115 proto_tcpv4.nb_listeners++;
1116}
1117
Willy Tarreau32282382017-09-15 07:44:44 +02001118/* Add <listener> to the list of tcpv6 listeners, on port <port>. The
1119 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1120 * The number of listeners for the protocol is updated.
Willy Tarreaue6b98942007-10-29 01:09:36 +01001121 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001122static void tcpv6_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001123{
1124 if (listener->state != LI_INIT)
1125 return;
1126 listener->state = LI_ASSIGNED;
1127 listener->proto = &proto_tcpv6;
Willy Tarreau32282382017-09-15 07:44:44 +02001128 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001129 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
1130 proto_tcpv6.nb_listeners++;
1131}
1132
Willy Tarreau092d8652014-07-07 20:22:12 +02001133/* Pause a listener. Returns < 0 in case of failure, 0 if the listener
1134 * was totally stopped, or > 0 if correctly paused.
1135 */
1136int tcp_pause_listener(struct listener *l)
1137{
1138 if (shutdown(l->fd, SHUT_WR) != 0)
1139 return -1; /* Solaris dies here */
1140
1141 if (listen(l->fd, l->backlog ? l->backlog : l->maxconn) != 0)
1142 return -1; /* OpenBSD dies here */
1143
1144 if (shutdown(l->fd, SHUT_RD) != 0)
1145 return -1; /* should always be OK */
1146 return 1;
1147}
1148
William Lallemand2e785f22016-05-25 01:48:42 +02001149/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001150 * Execute the "set-src" action. May be called from {tcp,http}request.
1151 * It only changes the address and tries to preserve the original port. If the
1152 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand2e785f22016-05-25 01:48:42 +02001153 */
1154enum act_return tcp_action_req_set_src(struct act_rule *rule, struct proxy *px,
1155 struct session *sess, struct stream *s, int flags)
1156{
1157 struct connection *cli_conn;
1158
1159 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1160 struct sample *smp;
1161
1162 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1163 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001164 int port = get_net_port(&cli_conn->addr.from);
1165
William Lallemand2e785f22016-05-25 01:48:42 +02001166 if (smp->data.type == SMP_T_IPV4) {
1167 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_family = AF_INET;
1168 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001169 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001170 } else if (smp->data.type == SMP_T_IPV6) {
1171 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_family = AF_INET6;
1172 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 +02001173 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001174 }
1175 }
William Lallemand01252ed2016-05-25 02:33:16 +02001176 cli_conn->flags |= CO_FL_ADDR_FROM_SET;
William Lallemand2e785f22016-05-25 01:48:42 +02001177 }
1178 return ACT_RET_CONT;
1179}
1180
William Lallemand44be6402016-05-25 01:51:35 +02001181/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001182 * Execute the "set-dst" action. May be called from {tcp,http}request.
1183 * It only changes the address and tries to preserve the original port. If the
1184 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001185 */
1186enum act_return tcp_action_req_set_dst(struct act_rule *rule, struct proxy *px,
1187 struct session *sess, struct stream *s, int flags)
1188{
1189 struct connection *cli_conn;
1190
1191 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1192 struct sample *smp;
1193
1194 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1195 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001196 int port = get_net_port(&cli_conn->addr.to);
1197
William Lallemand13e9b0c2016-05-25 02:34:07 +02001198 if (smp->data.type == SMP_T_IPV4) {
1199 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_family = AF_INET;
1200 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
1201 } else if (smp->data.type == SMP_T_IPV6) {
1202 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_family = AF_INET6;
1203 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 +02001204 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_port = port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001205 }
1206 cli_conn->flags |= CO_FL_ADDR_TO_SET;
1207 }
1208 }
1209 return ACT_RET_CONT;
1210}
1211
1212/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001213 * Execute the "set-src-port" action. May be called from {tcp,http}request.
1214 * We must test the sin_family before setting the port. If the address family
1215 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1216 * and the port is assigned.
William Lallemand44be6402016-05-25 01:51:35 +02001217 */
1218enum act_return tcp_action_req_set_src_port(struct act_rule *rule, struct proxy *px,
1219 struct session *sess, struct stream *s, int flags)
1220{
1221 struct connection *cli_conn;
1222
1223 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1224 struct sample *smp;
1225
1226 conn_get_from_addr(cli_conn);
1227
1228 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1229 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001230 if (cli_conn->addr.from.ss_family == AF_INET6) {
William Lallemand44be6402016-05-25 01:51:35 +02001231 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001232 } else {
1233 if (cli_conn->addr.from.ss_family != AF_INET) {
1234 cli_conn->addr.from.ss_family = AF_INET;
1235 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr = 0;
1236 }
1237 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_port = htons(smp->data.u.sint);
William Lallemand44be6402016-05-25 01:51:35 +02001238 }
1239 }
1240 }
1241 return ACT_RET_CONT;
1242}
1243
William Lallemand13e9b0c2016-05-25 02:34:07 +02001244/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001245 * Execute the "set-dst-port" action. May be called from {tcp,http}request.
1246 * We must test the sin_family before setting the port. If the address family
1247 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1248 * and the port is assigned.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001249 */
1250enum act_return tcp_action_req_set_dst_port(struct act_rule *rule, struct proxy *px,
1251 struct session *sess, struct stream *s, int flags)
1252{
1253 struct connection *cli_conn;
1254
1255 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1256 struct sample *smp;
1257
1258 conn_get_to_addr(cli_conn);
1259
1260 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1261 if (smp) {
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001262 if (cli_conn->addr.to.ss_family == AF_INET6) {
1263 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001264 } else {
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001265 if (cli_conn->addr.to.ss_family != AF_INET) {
1266 cli_conn->addr.to.ss_family = AF_INET;
1267 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr = 0;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001268 }
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001269 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_port = htons(smp->data.u.sint);
William Lallemand13e9b0c2016-05-25 02:34:07 +02001270 }
1271 }
1272 }
1273 return ACT_RET_CONT;
1274}
1275
Willy Tarreau2d392c22015-08-24 01:43:45 +02001276/* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
1277static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct proxy *px, struct session *sess, struct stream *strm, int flags)
1278{
1279 struct connection *conn = objt_conn(sess->origin);
1280
1281 if (!conn)
1282 goto out;
1283
1284 if (!conn_ctrl_ready(conn))
1285 goto out;
1286
Willy Tarreau2d392c22015-08-24 01:43:45 +02001287#ifdef TCP_QUICKACK
Willy Tarreaufc2a2d92015-09-29 18:15:01 +02001288 /* drain is needed only to send the quick ACK */
1289 conn_sock_drain(conn);
1290
Willy Tarreau2d392c22015-08-24 01:43:45 +02001291 /* re-enable quickack if it was disabled to ack all data and avoid
1292 * retransmits from the client that might trigger a real reset.
1293 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001294 setsockopt(conn->handle.fd, SOL_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001295#endif
1296 /* lingering must absolutely be disabled so that we don't send a
1297 * shutdown(), this is critical to the TCP_REPAIR trick. When no stream
1298 * is present, returning with ERR will cause lingering to be disabled.
1299 */
1300 if (strm)
1301 strm->si[0].flags |= SI_FL_NOLINGER;
1302
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001303 /* We're on the client-facing side, we must force to disable lingering to
1304 * ensure we will use an RST exclusively and kill any pending data.
1305 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001306 fdtab[conn->handle.fd].linger_risk = 1;
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001307
Willy Tarreau2d392c22015-08-24 01:43:45 +02001308#ifdef TCP_REPAIR
Willy Tarreau585744b2017-08-24 14:31:19 +02001309 if (setsockopt(conn->handle.fd, SOL_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
Willy Tarreau2d392c22015-08-24 01:43:45 +02001310 /* socket will be quiet now */
1311 goto out;
1312 }
1313#endif
1314 /* either TCP_REPAIR is not defined or it failed (eg: permissions).
1315 * Let's fall back on the TTL trick, though it only works for routed
1316 * network and has no effect on local net.
1317 */
1318#ifdef IP_TTL
Willy Tarreau585744b2017-08-24 14:31:19 +02001319 setsockopt(conn->handle.fd, SOL_IP, IP_TTL, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001320#endif
1321 out:
1322 /* kill the stream if any */
1323 if (strm) {
1324 channel_abort(&strm->req);
1325 channel_abort(&strm->res);
1326 strm->req.analysers = 0;
1327 strm->res.analysers = 0;
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001328 HA_ATOMIC_ADD(&strm->be->be_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001329 if (!(strm->flags & SF_ERR_MASK))
1330 strm->flags |= SF_ERR_PRXCOND;
1331 if (!(strm->flags & SF_FINST_MASK))
1332 strm->flags |= SF_FINST_R;
1333 }
1334
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001335 HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001336 if (sess->listener->counters)
Christopher Faulet8d8aa0d2017-05-30 15:36:50 +02001337 HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
Willy Tarreau2d392c22015-08-24 01:43:45 +02001338
1339 return ACT_RET_STOP;
1340}
1341
William Lallemand13e9b0c2016-05-25 02:34:07 +02001342/* parse "set-{src,dst}[-port]" action */
1343enum 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 +02001344{
1345 int cur_arg;
1346 struct sample_expr *expr;
1347 unsigned int where;
1348
1349 cur_arg = *orig_arg;
1350 expr = sample_parse_expr((char **)args, &cur_arg, px->conf.args.file, px->conf.args.line, err, &px->conf.args);
1351 if (!expr)
1352 return ACT_RET_PRS_ERR;
1353
1354 where = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001355 if (px->cap & PR_CAP_FE)
William Lallemand2e785f22016-05-25 01:48:42 +02001356 where |= SMP_VAL_FE_HRQ_HDR;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001357 if (px->cap & PR_CAP_BE)
William Lallemand2e785f22016-05-25 01:48:42 +02001358 where |= SMP_VAL_BE_HRQ_HDR;
1359
1360 if (!(expr->fetch->val & where)) {
1361 memprintf(err,
1362 "fetch method '%s' extracts information from '%s', none of which is available here",
1363 args[cur_arg-1], sample_src_names(expr->fetch->use));
1364 free(expr);
1365 return ACT_RET_PRS_ERR;
1366 }
1367 rule->arg.expr = expr;
1368 rule->action = ACT_CUSTOM;
1369
1370 if (!strcmp(args[*orig_arg-1], "set-src")) {
1371 rule->action_ptr = tcp_action_req_set_src;
William Lallemand44be6402016-05-25 01:51:35 +02001372 } else if (!strcmp(args[*orig_arg-1], "set-src-port")) {
1373 rule->action_ptr = tcp_action_req_set_src_port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001374 } else if (!strcmp(args[*orig_arg-1], "set-dst")) {
1375 rule->action_ptr = tcp_action_req_set_dst;
1376 } else if (!strcmp(args[*orig_arg-1], "set-dst-port")) {
1377 rule->action_ptr = tcp_action_req_set_dst_port;
William Lallemand2e785f22016-05-25 01:48:42 +02001378 } else {
1379 return ACT_RET_PRS_ERR;
1380 }
1381
1382 (*orig_arg)++;
1383
1384 return ACT_RET_PRS_OK;
1385}
1386
1387
Willy Tarreau2d392c22015-08-24 01:43:45 +02001388/* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
1389 * success, ACT_RET_PRS_ERR on error.
1390 */
1391static enum act_parse_ret tcp_parse_silent_drop(const char **args, int *orig_arg, struct proxy *px,
1392 struct act_rule *rule, char **err)
1393{
1394 rule->action = ACT_CUSTOM;
1395 rule->action_ptr = tcp_exec_action_silent_drop;
1396 return ACT_RET_PRS_OK;
1397}
1398
Willy Tarreau645513a2010-05-24 20:55:15 +02001399
1400/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001401/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02001402/************************************************************************/
1403
Willy Tarreau4a129812012-04-25 17:31:42 +02001404/* fetch the connection's source IPv4/IPv6 address */
Thierry FOURNIERa123ad82015-07-24 09:12:15 +02001405int smp_fetch_src(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001406{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001407 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001408
1409 if (!cli_conn)
1410 return 0;
1411
1412 switch (cli_conn->addr.from.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001413 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001414 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001415 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001416 break;
1417 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001418 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001419 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001420 break;
1421 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001422 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001423 }
Emeric Brunf769f512010-10-22 17:14:01 +02001424
Willy Tarreau37406352012-04-23 16:16:37 +02001425 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001426 return 1;
1427}
1428
Willy Tarreaua5e37562011-12-16 17:06:15 +01001429/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001430static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001431smp_fetch_sport(const struct arg *args, struct sample *smp, const char *k, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001432{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001433 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001434
1435 if (!cli_conn)
1436 return 0;
1437
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001438 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001439 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.from)))
Emeric Brunf769f512010-10-22 17:14:01 +02001440 return 0;
1441
Willy Tarreau37406352012-04-23 16:16:37 +02001442 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001443 return 1;
1444}
1445
Willy Tarreau4a129812012-04-25 17:31:42 +02001446/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001447static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001448smp_fetch_dst(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001449{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001450 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreau645513a2010-05-24 20:55:15 +02001451
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001452 if (!cli_conn)
1453 return 0;
1454
1455 conn_get_to_addr(cli_conn);
1456
1457 switch (cli_conn->addr.to.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001458 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001459 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001460 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001461 break;
1462 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001463 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001464 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001465 break;
1466 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001467 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001468 }
Emeric Brunf769f512010-10-22 17:14:01 +02001469
Willy Tarreau37406352012-04-23 16:16:37 +02001470 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001471 return 1;
1472}
1473
Willy Tarreau16e01562016-08-09 16:46:18 +02001474/* check if the destination address of the front connection is local to the
1475 * system or if it was intercepted.
1476 */
1477int smp_fetch_dst_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1478{
1479 struct connection *conn = objt_conn(smp->sess->origin);
1480 struct listener *li = smp->sess->listener;
1481
1482 if (!conn)
1483 return 0;
1484
1485 conn_get_to_addr(conn);
1486 if (!(conn->flags & CO_FL_ADDR_TO_SET))
1487 return 0;
1488
1489 smp->data.type = SMP_T_BOOL;
1490 smp->flags = 0;
1491 smp->data.u.sint = addr_is_local(li->netns, &conn->addr.to);
1492 return smp->data.u.sint >= 0;
1493}
1494
1495/* check if the source address of the front connection is local to the system
1496 * or not.
1497 */
1498int smp_fetch_src_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1499{
1500 struct connection *conn = objt_conn(smp->sess->origin);
1501 struct listener *li = smp->sess->listener;
1502
1503 if (!conn)
1504 return 0;
1505
1506 conn_get_from_addr(conn);
1507 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
1508 return 0;
1509
1510 smp->data.type = SMP_T_BOOL;
1511 smp->flags = 0;
1512 smp->data.u.sint = addr_is_local(li->netns, &conn->addr.from);
1513 return smp->data.u.sint >= 0;
1514}
1515
Willy Tarreaua5e37562011-12-16 17:06:15 +01001516/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001517static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001518smp_fetch_dport(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001519{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001520 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001521
1522 if (!cli_conn)
1523 return 0;
1524
1525 conn_get_to_addr(cli_conn);
Willy Tarreau645513a2010-05-24 20:55:15 +02001526
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001527 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001528 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.to)))
Emeric Brunf769f512010-10-22 17:14:01 +02001529 return 0;
1530
Willy Tarreau37406352012-04-23 16:16:37 +02001531 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001532 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01001533}
1534
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001535#ifdef TCP_INFO
1536
1537/* Returns some tcp_info data is its avalaible. "dir" must be set to 0 if
1538 * the client connection is require, otherwise it is set to 1. "val" represents
1539 * the required value. Use 0 for rtt and 1 for rttavg. "unit" is the expected unit
1540 * by default, the rtt is in us. Id "unit" is set to 0, the unit is us, if it is
1541 * set to 1, the untis are milliseconds.
1542 * If the function fails it returns 0, otherwise it returns 1 and "result" is filled.
1543 */
1544static inline int get_tcp_info(const struct arg *args, struct sample *smp,
1545 int dir, int val)
1546{
1547 struct connection *conn;
1548 struct tcp_info info;
1549 socklen_t optlen;
1550
1551 /* strm can be null. */
1552 if (!smp->strm)
1553 return 0;
1554
1555 /* get the object associated with the stream interface.The
1556 * object can be other thing than a connection. For example,
1557 * it be a appctx. */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001558 conn = cs_conn(objt_cs(smp->strm->si[dir].end));
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001559 if (!conn)
1560 return 0;
1561
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001562 /* The fd may not be available for the tcp_info struct, and the
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001563 syscal can fail. */
1564 optlen = sizeof(info);
Willy Tarreau585744b2017-08-24 14:31:19 +02001565 if (getsockopt(conn->handle.fd, SOL_TCP, TCP_INFO, &info, &optlen) == -1)
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001566 return 0;
1567
1568 /* extract the value. */
1569 smp->data.type = SMP_T_SINT;
1570 switch (val) {
Joe Williams30fcd392016-08-10 07:06:44 -07001571 case 0: smp->data.u.sint = info.tcpi_rtt; break;
1572 case 1: smp->data.u.sint = info.tcpi_rttvar; break;
1573#if defined(__linux__)
1574 /* these ones are common to all Linux versions */
1575 case 2: smp->data.u.sint = info.tcpi_unacked; break;
1576 case 3: smp->data.u.sint = info.tcpi_sacked; break;
1577 case 4: smp->data.u.sint = info.tcpi_lost; break;
1578 case 5: smp->data.u.sint = info.tcpi_retrans; break;
1579 case 6: smp->data.u.sint = info.tcpi_fackets; break;
1580 case 7: smp->data.u.sint = info.tcpi_reordering; break;
1581#elif defined(__FreeBSD__) || defined(__NetBSD__)
1582 /* the ones are found on FreeBSD and NetBSD featuring TCP_INFO */
1583 case 2: smp->data.u.sint = info.__tcpi_unacked; break;
1584 case 3: smp->data.u.sint = info.__tcpi_sacked; break;
1585 case 4: smp->data.u.sint = info.__tcpi_lost; break;
1586 case 5: smp->data.u.sint = info.__tcpi_retrans; break;
1587 case 6: smp->data.u.sint = info.__tcpi_fackets; break;
1588 case 7: smp->data.u.sint = info.__tcpi_reordering; break;
1589#endif
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001590 default: return 0;
1591 }
1592
1593 /* Convert the value as expected. */
1594 if (args) {
1595 if (args[0].type == ARGT_STR) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001596 if (strcmp(args[0].data.str.area, "us") == 0) {
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001597 /* Do nothing. */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001598 } else if (strcmp(args[0].data.str.area, "ms") == 0) {
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001599 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1600 } else
1601 return 0;
1602 } else if (args[0].type == ARGT_STOP) {
1603 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1604 } else
1605 return 0;
1606 }
1607
1608 return 1;
1609}
1610
1611/* get the mean rtt of a client connexion */
1612static int
1613smp_fetch_fc_rtt(const struct arg *args, struct sample *smp, const char *kw, void *private)
1614{
1615 if (!get_tcp_info(args, smp, 0, 0))
1616 return 0;
1617 return 1;
1618}
1619
1620/* get the variance of the mean rtt of a client connexion */
1621static int
1622smp_fetch_fc_rttvar(const struct arg *args, struct sample *smp, const char *kw, void *private)
1623{
1624 if (!get_tcp_info(args, smp, 0, 1))
1625 return 0;
1626 return 1;
1627}
Joe Williams30fcd392016-08-10 07:06:44 -07001628
1629#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1630
1631/* get the unacked counter on a client connexion */
1632static int
1633smp_fetch_fc_unacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1634{
1635 if (!get_tcp_info(args, smp, 0, 2))
1636 return 0;
1637 return 1;
1638}
1639
1640/* get the sacked counter on a client connexion */
1641static int
1642smp_fetch_fc_sacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1643{
1644 if (!get_tcp_info(args, smp, 0, 3))
1645 return 0;
1646 return 1;
1647}
1648
1649/* get the lost counter on a client connexion */
1650static int
1651smp_fetch_fc_lost(const struct arg *args, struct sample *smp, const char *kw, void *private)
1652{
1653 if (!get_tcp_info(args, smp, 0, 4))
1654 return 0;
1655 return 1;
1656}
1657
1658/* get the retrans counter on a client connexion */
1659static int
1660smp_fetch_fc_retrans(const struct arg *args, struct sample *smp, const char *kw, void *private)
1661{
1662 if (!get_tcp_info(args, smp, 0, 5))
1663 return 0;
1664 return 1;
1665}
1666
1667/* get the fackets counter on a client connexion */
1668static int
1669smp_fetch_fc_fackets(const struct arg *args, struct sample *smp, const char *kw, void *private)
1670{
1671 if (!get_tcp_info(args, smp, 0, 6))
1672 return 0;
1673 return 1;
1674}
1675
1676/* get the reordering counter on a client connexion */
1677static int
1678smp_fetch_fc_reordering(const struct arg *args, struct sample *smp, const char *kw, void *private)
1679{
1680 if (!get_tcp_info(args, smp, 0, 7))
1681 return 0;
1682 return 1;
1683}
1684#endif // linux || freebsd || netbsd
1685#endif // TCP_INFO
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001686
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001687#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001688/* parse the "v4v6" bind keyword */
1689static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1690{
1691 struct listener *l;
1692
1693 list_for_each_entry(l, &conf->listeners, by_bind) {
1694 if (l->addr.ss_family == AF_INET6)
1695 l->options |= LI_O_V4V6;
1696 }
1697
1698 return 0;
1699}
1700
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001701/* parse the "v6only" bind keyword */
1702static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1703{
1704 struct listener *l;
1705
1706 list_for_each_entry(l, &conf->listeners, by_bind) {
1707 if (l->addr.ss_family == AF_INET6)
1708 l->options |= LI_O_V6ONLY;
1709 }
1710
1711 return 0;
1712}
1713#endif
1714
Pieter Baauwd551fb52013-05-08 22:49:23 +02001715#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001716/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001717static 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 +02001718{
1719 struct listener *l;
1720
Willy Tarreau4348fad2012-09-20 16:48:07 +02001721 list_for_each_entry(l, &conf->listeners, by_bind) {
1722 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1723 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02001724 }
1725
Willy Tarreau44791242012-09-12 23:27:21 +02001726 return 0;
1727}
1728#endif
1729
1730#ifdef TCP_DEFER_ACCEPT
1731/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001732static 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 +02001733{
1734 struct listener *l;
1735
Willy Tarreau4348fad2012-09-20 16:48:07 +02001736 list_for_each_entry(l, &conf->listeners, by_bind) {
1737 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1738 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02001739 }
1740
Willy Tarreau44791242012-09-12 23:27:21 +02001741 return 0;
1742}
1743#endif
1744
Willy Tarreau1c862c52012-10-05 16:21:00 +02001745#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01001746/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02001747static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1748{
1749 struct listener *l;
1750
1751 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_TCP_FO;
1754 }
1755
1756 return 0;
1757}
1758#endif
1759
Willy Tarreau44791242012-09-12 23:27:21 +02001760#ifdef TCP_MAXSEG
1761/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001762static 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 +02001763{
1764 struct listener *l;
1765 int mss;
1766
Willy Tarreau44791242012-09-12 23:27:21 +02001767 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001768 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001769 return ERR_ALERT | ERR_FATAL;
1770 }
1771
1772 mss = atoi(args[cur_arg + 1]);
1773 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001774 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001775 return ERR_ALERT | ERR_FATAL;
1776 }
1777
Willy Tarreau4348fad2012-09-20 16:48:07 +02001778 list_for_each_entry(l, &conf->listeners, by_bind) {
1779 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1780 l->maxseg = mss;
1781 }
Willy Tarreau44791242012-09-12 23:27:21 +02001782
1783 return 0;
1784}
1785#endif
1786
Willy Tarreau2af207a2015-02-04 00:45:58 +01001787#ifdef TCP_USER_TIMEOUT
1788/* parse the "tcp-ut" bind keyword */
1789static int bind_parse_tcp_ut(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1790{
1791 const char *ptr = NULL;
1792 struct listener *l;
1793 unsigned int timeout;
1794
1795 if (!*args[cur_arg + 1]) {
1796 memprintf(err, "'%s' : missing TCP User Timeout value", args[cur_arg]);
1797 return ERR_ALERT | ERR_FATAL;
1798 }
1799
1800 ptr = parse_time_err(args[cur_arg + 1], &timeout, TIME_UNIT_MS);
1801 if (ptr) {
1802 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[cur_arg]);
1803 return ERR_ALERT | ERR_FATAL;
1804 }
1805
1806 list_for_each_entry(l, &conf->listeners, by_bind) {
1807 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1808 l->tcp_ut = timeout;
1809 }
1810
1811 return 0;
1812}
1813#endif
1814
Willy Tarreau44791242012-09-12 23:27:21 +02001815#ifdef SO_BINDTODEVICE
Willy Tarreau2af207a2015-02-04 00:45:58 +01001816/* parse the "interface" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001817static int bind_parse_interface(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
Willy Tarreau44791242012-09-12 23:27:21 +02001818{
1819 struct listener *l;
1820
Willy Tarreau44791242012-09-12 23:27:21 +02001821 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001822 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001823 return ERR_ALERT | ERR_FATAL;
1824 }
1825
Willy Tarreau4348fad2012-09-20 16:48:07 +02001826 list_for_each_entry(l, &conf->listeners, by_bind) {
1827 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1828 l->interface = strdup(args[cur_arg + 1]);
1829 }
Willy Tarreau44791242012-09-12 23:27:21 +02001830
Willy Tarreau44791242012-09-12 23:27:21 +02001831 return 0;
1832}
1833#endif
1834
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001835#ifdef CONFIG_HAP_NS
1836/* parse the "namespace" bind keyword */
1837static int bind_parse_namespace(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1838{
1839 struct listener *l;
1840 char *namespace = NULL;
1841
1842 if (!*args[cur_arg + 1]) {
1843 memprintf(err, "'%s' : missing namespace id", args[cur_arg]);
1844 return ERR_ALERT | ERR_FATAL;
1845 }
1846 namespace = args[cur_arg + 1];
1847
1848 list_for_each_entry(l, &conf->listeners, by_bind) {
1849 l->netns = netns_store_lookup(namespace, strlen(namespace));
1850
1851 if (l->netns == NULL)
1852 l->netns = netns_store_insert(namespace);
1853
1854 if (l->netns == NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001855 ha_alert("Cannot open namespace '%s'.\n", args[cur_arg + 1]);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001856 return ERR_ALERT | ERR_FATAL;
1857 }
1858 }
1859 return 0;
1860}
1861#endif
1862
Willy Tarreau163d4622015-10-13 16:16:41 +02001863#ifdef TCP_USER_TIMEOUT
1864/* parse the "tcp-ut" server keyword */
1865static int srv_parse_tcp_ut(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1866{
1867 const char *ptr = NULL;
1868 unsigned int timeout;
1869
1870 if (!*args[*cur_arg + 1]) {
1871 memprintf(err, "'%s' : missing TCP User Timeout value", args[*cur_arg]);
1872 return ERR_ALERT | ERR_FATAL;
1873 }
1874
1875 ptr = parse_time_err(args[*cur_arg + 1], &timeout, TIME_UNIT_MS);
1876 if (ptr) {
1877 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[*cur_arg]);
1878 return ERR_ALERT | ERR_FATAL;
1879 }
1880
1881 if (newsrv->addr.ss_family == AF_INET || newsrv->addr.ss_family == AF_INET6)
1882 newsrv->tcp_ut = timeout;
1883
1884 return 0;
1885}
1886#endif
1887
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001888
Willy Tarreau4a129812012-04-25 17:31:42 +02001889/* Note: must not be declared <const> as its list will be overwritten.
1890 * Note: fetches that may return multiple types must be declared as the lowest
1891 * common denominator, the type that can be casted into all other ones. For
1892 * instance v4/v6 must be declared v4.
1893 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02001894static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001895 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001896 { "dst_is_local", smp_fetch_dst_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001897 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001898 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001899 { "src_is_local", smp_fetch_src_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001900 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001901#ifdef TCP_INFO
Joe Williams30fcd392016-08-10 07:06:44 -07001902 { "fc_rtt", smp_fetch_fc_rtt, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1903 { "fc_rttvar", smp_fetch_fc_rttvar, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1904#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1905 { "fc_unacked", smp_fetch_fc_unacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1906 { "fc_sacked", smp_fetch_fc_sacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1907 { "fc_retrans", smp_fetch_fc_retrans, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1908 { "fc_fackets", smp_fetch_fc_fackets, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1909 { "fc_lost", smp_fetch_fc_lost, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1910 { "fc_reordering", smp_fetch_fc_reordering, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1911#endif // linux || freebsd || netbsd
1912#endif // TCP_INFO
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001913 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02001914}};
1915
Willy Tarreau44791242012-09-12 23:27:21 +02001916/************************************************************************/
1917/* All supported bind keywords must be declared here. */
1918/************************************************************************/
1919
1920/* Note: must not be declared <const> as its list will be overwritten.
1921 * Please take care of keeping this list alphabetically sorted, doing so helps
1922 * all code contributors.
1923 * Optional keywords are also declared with a NULL ->parse() function so that
1924 * the config parser can report an appropriate error when a known keyword was
1925 * not enabled.
1926 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02001927static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02001928#ifdef TCP_DEFER_ACCEPT
1929 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
1930#endif
1931#ifdef SO_BINDTODEVICE
1932 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
1933#endif
1934#ifdef TCP_MAXSEG
1935 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
1936#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01001937#ifdef TCP_USER_TIMEOUT
1938 { "tcp-ut", bind_parse_tcp_ut, 1 }, /* set User Timeout on listening socket */
1939#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001940#ifdef TCP_FASTOPEN
1941 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
1942#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02001943#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001944 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
1945#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001946#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001947 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001948 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
1949#endif
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001950#ifdef CONFIG_HAP_NS
1951 { "namespace", bind_parse_namespace, 1 },
1952#endif
Willy Tarreau44791242012-09-12 23:27:21 +02001953 /* the versions with the NULL parse function*/
1954 { "defer-accept", NULL, 0 },
1955 { "interface", NULL, 1 },
1956 { "mss", NULL, 1 },
1957 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01001958 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001959 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02001960 { NULL, NULL, 0 },
1961}};
1962
Willy Tarreau163d4622015-10-13 16:16:41 +02001963static struct srv_kw_list srv_kws = { "TCP", { }, {
1964#ifdef TCP_USER_TIMEOUT
Frédéric Lécaille5c3cd972017-03-15 16:36:09 +01001965 { "tcp-ut", srv_parse_tcp_ut, 1, 1 }, /* set TCP user timeout on server */
Willy Tarreau163d4622015-10-13 16:16:41 +02001966#endif
1967 { NULL, NULL, 0 },
1968}};
Willy Tarreau2d392c22015-08-24 01:43:45 +02001969
1970static struct action_kw_list tcp_req_conn_actions = {ILH, {
William Lallemand2e785f22016-05-25 01:48:42 +02001971 { "silent-drop", tcp_parse_silent_drop },
William Lallemand13e9b0c2016-05-25 02:34:07 +02001972 { "set-src", tcp_parse_set_src_dst },
1973 { "set-src-port", tcp_parse_set_src_dst },
1974 { "set-dst" , tcp_parse_set_src_dst },
1975 { "set-dst-port", tcp_parse_set_src_dst },
Willy Tarreau2d392c22015-08-24 01:43:45 +02001976 { /* END */ }
1977}};
1978
Willy Tarreau620408f2016-10-21 16:37:51 +02001979static struct action_kw_list tcp_req_sess_actions = {ILH, {
1980 { "silent-drop", tcp_parse_silent_drop },
1981 { "set-src", tcp_parse_set_src_dst },
1982 { "set-src-port", tcp_parse_set_src_dst },
1983 { "set-dst" , tcp_parse_set_src_dst },
1984 { "set-dst-port", tcp_parse_set_src_dst },
1985 { /* END */ }
1986}};
1987
Willy Tarreau2d392c22015-08-24 01:43:45 +02001988static struct action_kw_list tcp_req_cont_actions = {ILH, {
1989 { "silent-drop", tcp_parse_silent_drop },
1990 { /* END */ }
1991}};
1992
1993static struct action_kw_list tcp_res_cont_actions = {ILH, {
1994 { "silent-drop", tcp_parse_silent_drop },
1995 { /* END */ }
1996}};
1997
1998static struct action_kw_list http_req_actions = {ILH, {
William Lallemand2e785f22016-05-25 01:48:42 +02001999 { "silent-drop", tcp_parse_silent_drop },
William Lallemand13e9b0c2016-05-25 02:34:07 +02002000 { "set-src", tcp_parse_set_src_dst },
2001 { "set-src-port", tcp_parse_set_src_dst },
2002 { "set-dst", tcp_parse_set_src_dst },
2003 { "set-dst-port", tcp_parse_set_src_dst },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002004 { /* END */ }
2005}};
2006
2007static struct action_kw_list http_res_actions = {ILH, {
2008 { "silent-drop", tcp_parse_silent_drop },
2009 { /* END */ }
2010}};
2011
2012
Willy Tarreaue6b98942007-10-29 01:09:36 +01002013__attribute__((constructor))
2014static void __tcp_protocol_init(void)
2015{
2016 protocol_register(&proto_tcpv4);
2017 protocol_register(&proto_tcpv6);
Willy Tarreau12785782012-04-27 21:37:17 +02002018 sample_register_fetches(&sample_fetch_keywords);
Willy Tarreau44791242012-09-12 23:27:21 +02002019 bind_register_keywords(&bind_kws);
Willy Tarreau163d4622015-10-13 16:16:41 +02002020 srv_register_keywords(&srv_kws);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002021 tcp_req_conn_keywords_register(&tcp_req_conn_actions);
Willy Tarreau620408f2016-10-21 16:37:51 +02002022 tcp_req_sess_keywords_register(&tcp_req_sess_actions);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002023 tcp_req_cont_keywords_register(&tcp_req_cont_actions);
2024 tcp_res_cont_keywords_register(&tcp_res_cont_actions);
2025 http_req_keywords_register(&http_req_actions);
2026 http_res_keywords_register(&http_res_actions);
Willy Tarreauba962912016-12-21 18:55:02 +01002027
2028
2029 hap_register_build_opts("Built with transparent proxy support using:"
2030#if defined(IP_TRANSPARENT)
2031 " IP_TRANSPARENT"
2032#endif
2033#if defined(IPV6_TRANSPARENT)
2034 " IPV6_TRANSPARENT"
2035#endif
2036#if defined(IP_FREEBIND)
2037 " IP_FREEBIND"
2038#endif
2039#if defined(IP_BINDANY)
2040 " IP_BINDANY"
2041#endif
2042#if defined(IPV6_BINDANY)
2043 " IPV6_BINDANY"
2044#endif
2045#if defined(SO_BINDANY)
2046 " SO_BINDANY"
2047#endif
2048 "", 0);
Willy Tarreaue6b98942007-10-29 01:09:36 +01002049}
2050
2051
2052/*
2053 * Local variables:
2054 * c-indent-level: 8
2055 * c-basic-offset: 8
2056 * End:
2057 */