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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 Tarreaud1d54542012-09-12 22:58:11 +020052#include <proto/listener.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020053#include <proto/log.h>
54#include <proto/port_range.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020055#include <proto/protocol.h>
Willy Tarreau2d392c22015-08-24 01:43:45 +020056#include <proto/proto_http.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010057#include <proto/proto_tcp.h>
Willy Tarreaub6866442008-07-14 23:54:42 +020058#include <proto/proxy.h>
Willy Tarreaucd3b0942012-04-27 21:52:18 +020059#include <proto/sample.h>
Willy Tarreau163d4622015-10-13 16:16:41 +020060#include <proto/server.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020061#include <proto/task.h>
Willy Tarreau39713102016-11-25 15:49:32 +010062#include <proto/tcp_rules.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010063
Emeric Bruncf20bf12010-10-22 16:06:11 +020064static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
65static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreau9d5be5c2017-09-15 07:55:51 +020066static void tcpv4_add_listener(struct listener *listener, int port);
67static void tcpv6_add_listener(struct listener *listener, int port);
Willy Tarreaue6b98942007-10-29 01:09:36 +010068
69/* Note: must not be declared <const> as its list will be overwritten */
70static struct protocol proto_tcpv4 = {
71 .name = "tcpv4",
72 .sock_domain = AF_INET,
73 .sock_type = SOCK_STREAM,
74 .sock_prot = IPPROTO_TCP,
75 .sock_family = AF_INET,
76 .sock_addrlen = sizeof(struct sockaddr_in),
77 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020078 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020079 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020080 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010081 .bind_all = tcp_bind_listeners,
82 .unbind_all = unbind_all_listeners,
83 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020084 .get_src = tcp_get_src,
85 .get_dst = tcp_get_dst,
Willy Tarreau2b57cb82013-06-10 19:56:38 +020086 .drain = tcp_drain,
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 Tarreau2b57cb82013-06-10 19:56:38 +0200110 .drain = tcp_drain,
Willy Tarreau092d8652014-07-07 20:22:12 +0200111 .pause = tcp_pause_listener,
Willy Tarreau9d5be5c2017-09-15 07:55:51 +0200112 .add = tcpv6_add_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100113 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
114 .nb_listeners = 0,
115};
116
Olivier Houchard153659f2017-04-05 22:39:56 +0200117/* Default TCP parameters, got by opening a temporary TCP socket. */
118#ifdef TCP_MAXSEG
119static int default_tcp_maxseg = -1;
120static int default_tcp6_maxseg = -1;
121#endif
122
David du Colombier6f5ccb12011-03-10 22:26:24 +0100123/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100124 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
125 * - 0 : ignore remote address (may even be a NULL pointer)
126 * - 1 : use provided address
127 * - 2 : use provided port
128 * - 3 : use both
129 *
130 * The function supports multiple foreign binding methods :
131 * - linux_tproxy: we directly bind to the foreign address
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100132 * The second one can be used as a fallback for the first one.
133 * This function returns 0 when everything's OK, 1 if it could not bind, to the
134 * local address, 2 if it could not bind to the foreign address.
135 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100136int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100137{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100138 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100139 int foreign_ok = 0;
140 int ret;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100141 static int ip_transp_working = 1;
David du Colombier65c17962012-07-13 14:34:59 +0200142 static int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200143
David du Colombier65c17962012-07-13 14:34:59 +0200144 switch (local->ss_family) {
145 case AF_INET:
146 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200147 /* This deserves some explanation. Some platforms will support
148 * multiple combinations of certain methods, so we try the
149 * supported ones until one succeeds.
150 */
151 if (0
152#if defined(IP_TRANSPARENT)
153 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
154#endif
155#if defined(IP_FREEBIND)
156 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
157#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200158#if defined(IP_BINDANY)
159 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
160#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200161#if defined(SO_BINDANY)
162 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
163#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200164 )
David du Colombier65c17962012-07-13 14:34:59 +0200165 foreign_ok = 1;
166 else
167 ip_transp_working = 0;
168 }
169 break;
170 case AF_INET6:
171 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200172 if (0
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200173#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200174 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
175#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100176#if defined(IP_FREEBIND)
177 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
178#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200179#if defined(IPV6_BINDANY)
180 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
181#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200182#if defined(SO_BINDANY)
183 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
184#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200185 )
David du Colombier65c17962012-07-13 14:34:59 +0200186 foreign_ok = 1;
187 else
188 ip6_transp_working = 0;
189 }
190 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100191 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200192
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100193 if (flags) {
194 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200195 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100196 switch (remote->ss_family) {
197 case AF_INET:
198 if (flags & 1)
199 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
200 if (flags & 2)
201 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
202 break;
203 case AF_INET6:
204 if (flags & 1)
205 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
206 if (flags & 2)
207 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
208 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100209 default:
210 /* we don't want to try to bind to an unknown address family */
211 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100212 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100213 }
214
Simon Hormande072bd2011-06-24 15:11:37 +0900215 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100216 if (foreign_ok) {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200217 if (is_inet_addr(&bind_addr)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200218 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
219 if (ret < 0)
220 return 2;
221 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100222 }
223 else {
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200224 if (is_inet_addr(local)) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200225 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
226 if (ret < 0)
227 return 1;
228 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100229 }
230
231 if (!flags)
232 return 0;
233
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100234 if (!foreign_ok)
235 /* we could not bind to a foreign address */
236 return 2;
237
238 return 0;
239}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100240
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100241static int create_server_socket(struct connection *conn)
242{
Willy Tarreau529c1392014-12-24 13:47:55 +0100243 const struct netns_entry *ns = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100244
Willy Tarreau529c1392014-12-24 13:47:55 +0100245#ifdef CONFIG_HAP_NS
246 if (objt_server(conn->target)) {
247 if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
248 ns = conn->proxy_netns;
249 else
250 ns = __objt_server(conn->target)->netns;
251 }
252#endif
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100253 return my_socketat(ns, conn->addr.to.ss_family, SOCK_STREAM, IPPROTO_TCP);
254}
Willy Tarreau9650f372009-08-16 14:02:45 +0200255
256/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200257 * This function initiates a TCP connection establishment to the target assigned
258 * to connection <conn> using (si->{target,addr.to}). A source address may be
259 * pointed to by conn->addr.from in case of transparent proxying. Normal source
260 * bind addresses are still determined locally (due to the possible need of a
261 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100262 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100263 * supported. The <data> parameter is a boolean indicating whether there are data
264 * waiting for being sent or not, in order to adjust data write polling and on
265 * some platforms, the ability to avoid an empty initial ACK. The <delack> argument
266 * allows the caller to force using a delayed ACK when establishing the connection :
267 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
268 * - 1 = delayed ACK if backend has tcp-smart-connect, regardless of data
269 * - 2 = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200270 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200271 * Note that a pending send_proxy message accounts for data.
272 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200273 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +0200274 * - SF_ERR_NONE if everything's OK
275 * - SF_ERR_SRVTO if there are no more servers
276 * - SF_ERR_SRVCL if the connection was refused by the server
277 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
278 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
279 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +0100280 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100281 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200282 * The connection's fd is inserted only when SF_ERR_NONE is returned, otherwise
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100283 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200284 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100285
Willy Tarreauf0837b22012-11-24 10:24:27 +0100286int tcp_connect_server(struct connection *conn, int data, int delack)
Willy Tarreau9650f372009-08-16 14:02:45 +0200287{
288 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100289 struct server *srv;
290 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100291 struct conn_src *src;
Willy Tarreauac825402011-03-04 22:04:29 +0100292
Willy Tarreau9ce70132014-01-24 16:08:19 +0100293 conn->flags = CO_FL_WAIT_L4_CONN; /* connection in progress */
294
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100295 switch (obj_type(conn->target)) {
296 case OBJ_TYPE_PROXY:
297 be = objt_proxy(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100298 srv = NULL;
299 break;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100300 case OBJ_TYPE_SERVER:
301 srv = objt_server(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100302 be = srv->proxy;
303 break;
304 default:
Willy Tarreau9ce70132014-01-24 16:08:19 +0100305 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200306 return SF_ERR_INTERNAL;
Willy Tarreauac825402011-03-04 22:04:29 +0100307 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200308
Willy Tarreau585744b2017-08-24 14:31:19 +0200309 fd = conn->handle.fd = create_server_socket(conn);
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100310
311 if (fd == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200312 qfprintf(stderr, "Cannot get a server socket.\n");
313
Willy Tarreau9ce70132014-01-24 16:08:19 +0100314 if (errno == ENFILE) {
315 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200316 send_log(be, LOG_EMERG,
317 "Proxy %s reached system FD limit at %d. Please check system tunables.\n",
318 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100319 }
320 else if (errno == EMFILE) {
321 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200322 send_log(be, LOG_EMERG,
323 "Proxy %s reached process FD limit at %d. Please check 'ulimit-n' and restart.\n",
324 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100325 }
326 else if (errno == ENOBUFS || errno == ENOMEM) {
327 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200328 send_log(be, LOG_EMERG,
329 "Proxy %s reached system memory limit at %d sockets. Please check system tunables.\n",
330 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100331 }
332 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
333 conn->err_code = CO_ER_NOPROTO;
334 }
335 else
336 conn->err_code = CO_ER_SOCK_ERR;
337
Willy Tarreau9650f372009-08-16 14:02:45 +0200338 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100339 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200340 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200341 }
342
343 if (fd >= global.maxsock) {
344 /* do not log anything there, it's a normal condition when this option
345 * is used to serialize connections to a server !
346 */
347 Alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
348 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100349 conn->err_code = CO_ER_CONF_FDLIM;
350 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200351 return SF_ERR_PRXCOND; /* it is a configuration limit */
Willy Tarreau9650f372009-08-16 14:02:45 +0200352 }
353
354 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900355 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200356 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
357 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100358 conn->err_code = CO_ER_SOCK_ERR;
359 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200360 return SF_ERR_INTERNAL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200361 }
362
363 if (be->options & PR_O_TCP_SRV_KA)
Simon Hormande072bd2011-06-24 15:11:37 +0900364 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200365
Willy Tarreau9650f372009-08-16 14:02:45 +0200366 /* allow specific binding :
367 * - server-specific at first
368 * - proxy-specific next
369 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100370 if (srv && srv->conn_src.opts & CO_SRC_BIND)
371 src = &srv->conn_src;
372 else if (be->conn_src.opts & CO_SRC_BIND)
373 src = &be->conn_src;
374 else
375 src = NULL;
376
377 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200378 int ret, flags = 0;
379
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200380 if (is_inet_addr(&conn->addr.from)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100381 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100382 case CO_SRC_TPROXY_CLI:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200383 conn->flags |= CO_FL_PRIVATE;
384 /* fall through */
385 case CO_SRC_TPROXY_ADDR:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200386 flags = 3;
387 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100388 case CO_SRC_TPROXY_CIP:
389 case CO_SRC_TPROXY_DYN:
Willy Tarreau387ebf82015-08-04 19:24:13 +0200390 conn->flags |= CO_FL_PRIVATE;
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200391 flags = 1;
392 break;
393 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200394 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200395
Willy Tarreau9650f372009-08-16 14:02:45 +0200396#ifdef SO_BINDTODEVICE
397 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100398 if (src->iface_name)
399 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200400#endif
401
Willy Tarreaua4380b42012-12-08 22:49:11 +0100402 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200403 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100404 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200405
406 ret = 1;
Vincent Bernat6e615892016-05-18 16:17:44 +0200407 memcpy(&sa, &src->source_addr, sizeof(sa));
Willy Tarreau9650f372009-08-16 14:02:45 +0200408
409 do {
410 /* note: in case of retry, we may have to release a previously
411 * allocated port, hence this loop's construct.
412 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200413 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
414 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200415
416 if (!attempts)
417 break;
418 attempts--;
419
Willy Tarreaua4380b42012-12-08 22:49:11 +0100420 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100421 if (!fdinfo[fd].local_port) {
422 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200423 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100424 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200425
Willy Tarreaua4380b42012-12-08 22:49:11 +0100426 fdinfo[fd].port_range = src->sport_range;
427 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200428
Willy Tarreaua4380b42012-12-08 22:49:11 +0100429 ret = tcp_bind_socket(fd, flags, &sa, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100430 if (ret != 0)
431 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200432 } while (ret != 0); /* binding NOK */
433 }
434 else {
Lukas Tribus7d56c6d2016-09-13 09:51:15 +0000435#ifdef IP_BIND_ADDRESS_NO_PORT
436 static int bind_address_no_port = 1;
437 setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
438#endif
Willy Tarreaua4380b42012-12-08 22:49:11 +0100439 ret = tcp_bind_socket(fd, flags, &src->source_addr, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100440 if (ret != 0)
441 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200442 }
443
Willy Tarreaua4380b42012-12-08 22:49:11 +0100444 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200445 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
446 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200447 close(fd);
448
Willy Tarreau9650f372009-08-16 14:02:45 +0200449 if (ret == 1) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100450 Alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200451 be->id);
452 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100453 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200454 be->id);
455 } else {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100456 Alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200457 be->id);
458 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100459 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200460 be->id);
461 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100462 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200463 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200464 }
465 }
466
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400467#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200468 /* disabling tcp quick ack now allows the first request to leave the
469 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100470 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200471 */
Willy Tarreaufb20e462014-10-24 12:02:24 +0200472 if (delack == 2 || ((delack || data || conn->send_proxy_ofs) && (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900473 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200474#endif
475
Willy Tarreau163d4622015-10-13 16:16:41 +0200476#ifdef TCP_USER_TIMEOUT
477 /* there is not much more we can do here when it fails, it's still minor */
478 if (srv && srv->tcp_ut)
479 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &srv->tcp_ut, sizeof(srv->tcp_ut));
480#endif
Willy Tarreaue803de22010-01-21 17:43:04 +0100481 if (global.tune.server_sndbuf)
482 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
483
484 if (global.tune.server_rcvbuf)
485 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
486
Willy Tarreau819efbf2017-01-25 14:12:22 +0100487 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) == -1) {
488 if (errno == EINPROGRESS || errno == EALREADY) {
489 /* common case, let's wait for connect status */
490 conn->flags |= CO_FL_WAIT_L4_CONN;
491 }
492 else if (errno == EISCONN) {
493 /* should normally not happen but if so, indicates that it's OK */
494 conn->flags &= ~CO_FL_WAIT_L4_CONN;
495 }
496 else if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200497 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100498 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200499 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100500 conn->err_code = CO_ER_FREE_PORTS;
501 }
502 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200503 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100504 conn->err_code = CO_ER_ADDR_INUSE;
505 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200506
Willy Tarreaub1719512012-12-08 23:03:28 +0100507 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200508 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
509 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200510 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100511 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100512 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200513 return SF_ERR_RESOURCE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200514 } else if (errno == ETIMEDOUT) {
515 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200516 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
517 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200518 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100519 conn->err_code = CO_ER_SOCK_ERR;
520 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200521 return SF_ERR_SRVTO;
Willy Tarreau9650f372009-08-16 14:02:45 +0200522 } else {
523 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
524 //qfprintf(stderr,"Connect(): %d", errno);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200525 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
526 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200527 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100528 conn->err_code = CO_ER_SOCK_ERR;
529 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200530 return SF_ERR_SRVCL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200531 }
532 }
Willy Tarreau819efbf2017-01-25 14:12:22 +0100533 else {
534 /* connect() == 0, this is great! */
535 conn->flags &= ~CO_FL_WAIT_L4_CONN;
536 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200537
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100538 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200539
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200540 /* Prepare to send a few handshakes related to the on-wire protocol. */
541 if (conn->send_proxy_ofs)
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200542 conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200543
Willy Tarreauf79c8172013-10-21 16:30:56 +0200544 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100545 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200546
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200547 if (conn_xprt_init(conn) < 0) {
Willy Tarreauf79c8172013-10-21 16:30:56 +0200548 conn_force_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100549 conn->flags |= CO_FL_ERROR;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200550 return SF_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200551 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200552
Willy Tarreau819efbf2017-01-25 14:12:22 +0100553 if (conn->flags & (CO_FL_HANDSHAKE | CO_FL_WAIT_L4_CONN)) {
554 conn_sock_want_send(conn); /* for connect status, proxy protocol or SSL */
555 }
556 else {
557 /* If there's no more handshake, we need to notify the data
558 * layer when the connection is already OK otherwise we'll have
559 * no other opportunity to do it later (eg: health checks).
560 */
561 data = 1;
562 }
563
Willy Tarreau14f8e862012-08-30 22:23:13 +0200564 if (data)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200565 conn_data_want_send(conn); /* prepare to send data if any */
Willy Tarreau9650f372009-08-16 14:02:45 +0200566
Willy Tarreaue7dff022015-04-03 01:14:29 +0200567 return SF_ERR_NONE; /* connection is OK */
Willy Tarreau9650f372009-08-16 14:02:45 +0200568}
569
570
Willy Tarreau59b94792012-05-11 16:16:40 +0200571/*
572 * Retrieves the source address for the socket <fd>, with <dir> indicating
573 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
574 * success, -1 in case of error. The socket's source address is stored in
575 * <sa> for <salen> bytes.
576 */
577int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
578{
579 if (dir)
580 return getsockname(fd, sa, &salen);
581 else
582 return getpeername(fd, sa, &salen);
583}
584
585
586/*
587 * Retrieves the original destination address for the socket <fd>, with <dir>
588 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
589 * listener, if the original destination address was translated, the original
590 * address is retrieved. It returns 0 in case of success, -1 in case of error.
591 * The socket's source address is stored in <sa> for <salen> bytes.
592 */
593int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
594{
595 if (dir)
596 return getpeername(fd, sa, &salen);
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100597 else {
598 int ret = getsockname(fd, sa, &salen);
599
600 if (ret < 0)
601 return ret;
602
Willy Tarreau59b94792012-05-11 16:16:40 +0200603#if defined(TPROXY) && defined(SO_ORIGINAL_DST)
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100604 /* For TPROXY and Netfilter's NAT, we can retrieve the original
605 * IPv4 address before DNAT/REDIRECT. We must not do that with
606 * other families because v6-mapped IPv4 addresses are still
607 * reported as v4.
608 */
609 if (((struct sockaddr_storage *)sa)->ss_family == AF_INET
610 && getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
611 return 0;
Willy Tarreau59b94792012-05-11 16:16:40 +0200612#endif
Willy Tarreau5e0d0e02014-10-29 21:46:01 +0100613 return ret;
614 }
Willy Tarreau59b94792012-05-11 16:16:40 +0200615}
616
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200617/* Tries to drain any pending incoming data from the socket to reach the
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100618 * receive shutdown. Returns positive if the shutdown was found, negative
619 * if EAGAIN was hit, otherwise zero. This is useful to decide whether we
620 * can close a connection cleanly are we must kill it hard.
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200621 */
622int tcp_drain(int fd)
623{
624 int turns = 2;
625 int len;
626
627 while (turns) {
628#ifdef MSG_TRUNC_CLEARS_INPUT
629 len = recv(fd, NULL, INT_MAX, MSG_DONTWAIT | MSG_NOSIGNAL | MSG_TRUNC);
630 if (len == -1 && errno == EFAULT)
631#endif
632 len = recv(fd, trash.str, trash.size, MSG_DONTWAIT | MSG_NOSIGNAL);
633
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100634 if (len == 0) {
635 /* cool, shutdown received */
636 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200637 return 1;
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100638 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200639
640 if (len < 0) {
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100641 if (errno == EAGAIN) {
642 /* connection not closed yet */
643 fd_cant_recv(fd);
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100644 return -1;
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100645 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200646 if (errno == EINTR) /* oops, try again */
647 continue;
648 /* other errors indicate a dead connection, fine. */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100649 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200650 return 1;
651 }
652 /* OK we read some data, let's try again once */
653 turns--;
654 }
655 /* some data are still present, give up */
656 return 0;
657}
658
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200659/* This is the callback which is set when a connection establishment is pending
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100660 * and we have nothing to send. It updates the FD polling status. It returns 0
661 * if it fails in a fatal way or needs to poll to go further, otherwise it
662 * returns non-zero and removes the CO_FL_WAIT_L4_CONN flag from the connection's
663 * flags. In case of error, it sets CO_FL_ERROR and leaves the error code in
664 * errno. The error checking is done in two passes in order to limit the number
665 * of syscalls in the normal case :
666 * - if POLL_ERR was reported by the poller, we check for a pending error on
667 * the socket before proceeding. If found, it's assigned to errno so that
668 * upper layers can see it.
669 * - otherwise connect() is used to check the connection state again, since
670 * the getsockopt return cannot reliably be used to know if the connection
671 * is still pending or ready. This one may often return an error as well,
672 * since we don't always have POLL_ERR (eg: OSX or cached events).
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200673 */
Willy Tarreau239d7182012-07-23 18:53:03 +0200674int tcp_connect_probe(struct connection *conn)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200675{
Willy Tarreau585744b2017-08-24 14:31:19 +0200676 int fd = conn->handle.fd;
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100677 socklen_t lskerr;
678 int skerr;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200679
Willy Tarreau80184712012-07-06 14:54:49 +0200680 if (conn->flags & CO_FL_ERROR)
Willy Tarreauafad0e02012-08-09 14:45:22 +0200681 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200682
Willy Tarreau3c728722014-01-23 13:50:42 +0100683 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200684 return 0;
685
Willy Tarreau80184712012-07-06 14:54:49 +0200686 if (!(conn->flags & CO_FL_WAIT_L4_CONN))
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200687 return 1; /* strange we were called while ready */
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200688
Willy Tarreaufd803bb2014-01-20 15:13:07 +0100689 if (!fd_send_ready(fd))
690 return 0;
691
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100692 /* we might be the first witness of FD_POLL_ERR. Note that FD_POLL_HUP
693 * without FD_POLL_IN also indicates a hangup without input data meaning
694 * there was no connection.
695 */
696 if (fdtab[fd].ev & FD_POLL_ERR ||
697 (fdtab[fd].ev & (FD_POLL_IN|FD_POLL_HUP)) == FD_POLL_HUP) {
698 skerr = 0;
699 lskerr = sizeof(skerr);
700 getsockopt(fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr);
701 errno = skerr;
702 if (errno == EAGAIN)
703 errno = 0;
704 if (errno)
705 goto out_error;
706 }
Willy Tarreau2da156f2012-07-23 15:07:23 +0200707
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100708 /* Use connect() to check the state of the socket. This has the
709 * advantage of giving us the following info :
Willy Tarreau2c6be842012-07-06 17:12:34 +0200710 * - error
711 * - connecting (EALREADY, EINPROGRESS)
712 * - connected (EISCONN, 0)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200713 */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200714 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) < 0) {
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200715 if (errno == EALREADY || errno == EINPROGRESS) {
Willy Tarreaud486ef52012-12-10 17:03:52 +0100716 __conn_sock_stop_recv(conn);
Willy Tarreaue1f50c42014-01-22 20:02:06 +0100717 fd_cant_send(fd);
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200718 return 0;
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200719 }
Willy Tarreaua190d592012-05-20 18:35:19 +0200720
Willy Tarreau2c6be842012-07-06 17:12:34 +0200721 if (errno && errno != EISCONN)
Willy Tarreaua190d592012-05-20 18:35:19 +0200722 goto out_error;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200723
Willy Tarreau2c6be842012-07-06 17:12:34 +0200724 /* otherwise we're connected */
Willy Tarreaua190d592012-05-20 18:35:19 +0200725 }
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200726
Willy Tarreau076be252012-07-06 16:02:29 +0200727 /* The FD is ready now, we'll mark the connection as complete and
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200728 * forward the event to the transport layer which will notify the
729 * data layer.
Willy Tarreaua190d592012-05-20 18:35:19 +0200730 */
Willy Tarreau80184712012-07-06 14:54:49 +0200731 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200732 return 1;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200733
734 out_error:
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200735 /* Write error on the file descriptor. Report it to the connection
736 * and disable polling on this FD.
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200737 */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100738 fdtab[fd].linger_risk = 0;
Willy Tarreau26f4a042013-12-04 23:44:10 +0100739 conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH;
Willy Tarreaud486ef52012-12-10 17:03:52 +0100740 __conn_sock_stop_both(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200741 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200742}
743
Olivier Houchard153659f2017-04-05 22:39:56 +0200744/* XXX: Should probably be elsewhere */
745static int compare_sockaddr(struct sockaddr_storage *a, struct sockaddr_storage *b)
746{
747 if (a->ss_family != b->ss_family) {
748 return (-1);
749 }
750 switch (a->ss_family) {
751 case AF_INET:
752 {
753 struct sockaddr_in *a4 = (void *)a, *b4 = (void *)b;
754 if (a4->sin_port != b4->sin_port)
755 return (-1);
756 return (memcmp(&a4->sin_addr, &b4->sin_addr,
757 sizeof(a4->sin_addr)));
758 }
759 case AF_INET6:
760 {
761 struct sockaddr_in6 *a6 = (void *)a, *b6 = (void *)b;
762 if (a6->sin6_port != b6->sin6_port)
763 return (-1);
764 return (memcmp(&a6->sin6_addr, &b6->sin6_addr,
765 sizeof(a6->sin6_addr)));
766 }
767 default:
768 return (-1);
769 }
770
771}
772
773#define LI_MANDATORY_FLAGS (LI_O_FOREIGN | LI_O_V6ONLY | LI_O_V4V6)
774/* When binding the listeners, check if a socket has been sent to us by the
775 * previous process that we could reuse, instead of creating a new one.
776 */
777static int tcp_find_compatible_fd(struct listener *l)
778{
779 struct xfer_sock_list *xfer_sock = xfer_sock_list;
780 int ret = -1;
781
782 while (xfer_sock) {
783 if (!compare_sockaddr(&xfer_sock->addr, &l->addr)) {
784 if ((l->interface == NULL && xfer_sock->iface == NULL) ||
785 (l->interface != NULL && xfer_sock->iface != NULL &&
786 !strcmp(l->interface, xfer_sock->iface))) {
787 if ((l->options & LI_MANDATORY_FLAGS) ==
788 (xfer_sock->options & LI_MANDATORY_FLAGS)) {
789 if ((xfer_sock->namespace == NULL &&
790 l->netns == NULL)
791#ifdef CONFIG_HAP_NS
792 || (xfer_sock->namespace != NULL &&
793 l->netns != NULL &&
794 !strcmp(xfer_sock->namespace,
795 l->netns->node.key))
796#endif
797 ) {
798 break;
799 }
800
801 }
802 }
803 }
804 xfer_sock = xfer_sock->next;
805 }
806 if (xfer_sock != NULL) {
807 ret = xfer_sock->fd;
808 if (xfer_sock == xfer_sock_list)
809 xfer_sock_list = xfer_sock->next;
810 if (xfer_sock->prev)
811 xfer_sock->prev->next = xfer_sock->next;
812 if (xfer_sock->next)
813 xfer_sock->next->prev = xfer_sock->prev;
814 free(xfer_sock->iface);
815 free(xfer_sock->namespace);
816 free(xfer_sock);
817 }
818 return ret;
819}
820#undef L1_MANDATORY_FLAGS
Willy Tarreau59b94792012-05-11 16:16:40 +0200821
Willy Tarreaue6b98942007-10-29 01:09:36 +0100822/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100823 * an error message in <errmsg> if the message is at most <errlen> bytes long
824 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
825 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100826 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
827 * was alright and that no message was returned. ERR_RETRYABLE means that an
828 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700829 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100830 * the meaning of the error, but just indicate that a message is present which
831 * should be displayed with the respective level. Last, ERR_ABORT indicates
832 * that it's pointless to try to start other listeners. No error message is
833 * returned if errlen is NULL.
834 */
835int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
836{
837 __label__ tcp_return, tcp_close_return;
838 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100839 int ext, ready;
840 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100841 const char *msg = NULL;
Olivier Houchard153659f2017-04-05 22:39:56 +0200842#ifdef TCP_MAXSEG
843
844 /* Create a temporary TCP socket to get default parameters we can't
845 * guess.
846 * */
847 ready_len = sizeof(default_tcp_maxseg);
848 if (default_tcp_maxseg == -1) {
849 default_tcp_maxseg = -2;
850 fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
851 if (fd < 0)
852 Warning("Failed to create a temporary socket!\n");
853 else {
854 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp_maxseg,
855 &ready_len) == -1)
856 Warning("Failed to get the default value of TCP_MAXSEG\n");
857 }
858 close(fd);
859 }
860 if (default_tcp6_maxseg == -1) {
861 default_tcp6_maxseg = -2;
862 fd = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
863 if (fd >= 0) {
864 if (getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &default_tcp6_maxseg,
865 &ready_len) == -1)
866 Warning("Failed ot get the default value of TCP_MAXSEG for IPv6\n");
867 close(fd);
868 }
869 }
870#endif
871
Willy Tarreaue6b98942007-10-29 01:09:36 +0100872
873 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100874 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100875 *errmsg = 0;
876
877 if (listener->state != LI_ASSIGNED)
878 return ERR_NONE; /* already bound */
879
880 err = ERR_NONE;
881
Olivier Houchard153659f2017-04-05 22:39:56 +0200882 if (listener->fd == -1)
883 listener->fd = tcp_find_compatible_fd(listener);
884
Willy Tarreau40aa0702013-03-10 23:51:38 +0100885 /* if the listener already has an fd assigned, then we were offered the
886 * fd by an external process (most likely the parent), and we don't want
887 * to create a new socket. However we still want to set a few flags on
888 * the socket.
889 */
890 fd = listener->fd;
891 ext = (fd >= 0);
892
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100893 if (!ext) {
894 fd = my_socketat(listener->netns, listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
895
896 if (fd == -1) {
897 err |= ERR_RETRYABLE | ERR_ALERT;
898 msg = "cannot create listening socket";
899 goto tcp_return;
900 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100901 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100902
Willy Tarreaue6b98942007-10-29 01:09:36 +0100903 if (fd >= global.maxsock) {
904 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
905 msg = "not enough free sockets (raise '-n' parameter)";
906 goto tcp_close_return;
907 }
908
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200909 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100910 err |= ERR_FATAL | ERR_ALERT;
911 msg = "cannot make socket non-blocking";
912 goto tcp_close_return;
913 }
914
Willy Tarreau40aa0702013-03-10 23:51:38 +0100915 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100916 /* not fatal but should be reported */
917 msg = "cannot do so_reuseaddr";
918 err |= ERR_ALERT;
919 }
920
921 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900922 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Olivier Houchard153659f2017-04-05 22:39:56 +0200923 else {
924 struct linger tmplinger;
925 socklen_t len = sizeof(tmplinger);
926 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger, &len) == 0 &&
927 (tmplinger.l_onoff == 1 || tmplinger.l_linger == 0)) {
928 tmplinger.l_onoff = 0;
929 tmplinger.l_linger = 0;
930 setsockopt(fd, SOL_SOCKET, SO_LINGER, &tmplinger,
931 sizeof(tmplinger));
932 }
933 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100934
Willy Tarreaue6b98942007-10-29 01:09:36 +0100935#ifdef SO_REUSEPORT
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000936 /* OpenBSD and Linux 3.9 support this. As it's present in old libc versions of
937 * Linux, it might return an error that we will silently ignore.
Willy Tarreaue6b98942007-10-29 01:09:36 +0100938 */
Lukas Tribusa0bcbdc2016-09-12 21:42:20 +0000939 if (!ext && (global.tune.options & GTUNE_USE_REUSEPORT))
Willy Tarreau40aa0702013-03-10 23:51:38 +0100940 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100941#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200942
Willy Tarreau40aa0702013-03-10 23:51:38 +0100943 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200944 switch (listener->addr.ss_family) {
945 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200946 if (1
947#if defined(IP_TRANSPARENT)
948 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
949#endif
950#if defined(IP_FREEBIND)
951 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
952#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200953#if defined(IP_BINDANY)
954 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
955#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200956#if defined(SO_BINDANY)
957 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
958#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200959 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200960 msg = "cannot make listening socket transparent";
961 err |= ERR_ALERT;
962 }
963 break;
964 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200965 if (1
Dinko Korunic7276f3a2016-09-09 09:41:15 +0200966#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
Pieter Baauwd551fb52013-05-08 22:49:23 +0200967 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
968#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100969#if defined(IP_FREEBIND)
970 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
971#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200972#if defined(IPV6_BINDANY)
973 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
974#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200975#if defined(SO_BINDANY)
976 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
977#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200978 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200979 msg = "cannot make listening socket transparent";
980 err |= ERR_ALERT;
981 }
982 break;
983 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100984 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200985
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100986#ifdef SO_BINDTODEVICE
987 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100988 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100989 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100990 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100991 msg = "cannot bind listener to device";
992 err |= ERR_WARN;
993 }
994 }
995#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400996#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100997 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400998 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200999 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
1000 msg = "cannot set MSS";
1001 err |= ERR_WARN;
1002 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001003 } else if (ext) {
1004 int tmpmaxseg = -1;
1005 int defaultmss;
1006 socklen_t len = sizeof(tmpmaxseg);
1007
1008 if (listener->addr.ss_family == AF_INET)
1009 defaultmss = default_tcp_maxseg;
1010 else
1011 defaultmss = default_tcp6_maxseg;
1012
1013 getsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &tmpmaxseg, &len);
1014 if (tmpmaxseg != defaultmss && setsockopt(fd, IPPROTO_TCP,
1015 TCP_MAXSEG, &defaultmss,
1016 sizeof(defaultmss)) == -1) {
1017 msg = "cannot set MSS";
1018 err |= ERR_WARN;
1019 }
Willy Tarreaube1b9182009-06-14 18:48:19 +02001020 }
1021#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01001022#if defined(TCP_USER_TIMEOUT)
1023 if (listener->tcp_ut) {
1024 if (setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT,
1025 &listener->tcp_ut, sizeof(listener->tcp_ut)) == -1) {
1026 msg = "cannot set TCP User Timeout";
1027 err |= ERR_WARN;
1028 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001029 } else
1030 setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, &zero,
1031 sizeof(zero));
Willy Tarreau2af207a2015-02-04 00:45:58 +01001032#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +02001033#if defined(TCP_DEFER_ACCEPT)
1034 if (listener->options & LI_O_DEF_ACCEPT) {
1035 /* defer accept by up to one second */
1036 int accept_delay = 1;
1037 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
1038 msg = "cannot enable DEFER_ACCEPT";
1039 err |= ERR_WARN;
1040 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001041 } else
1042 setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &zero,
1043 sizeof(zero));
Willy Tarreaucb6cd432009-10-13 07:34:14 +02001044#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001045#if defined(TCP_FASTOPEN)
1046 if (listener->options & LI_O_TCP_FO) {
1047 /* TFO needs a queue length, let's use the configured backlog */
1048 int qlen = listener->backlog ? listener->backlog : listener->maxconn;
1049 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
1050 msg = "cannot enable TCP_FASTOPEN";
1051 err |= ERR_WARN;
1052 }
Olivier Houchard153659f2017-04-05 22:39:56 +02001053 } else {
1054 socklen_t len;
1055 int qlen;
1056 len = sizeof(qlen);
1057 /* Only disable fast open if it was enabled, we don't want
1058 * the kernel to create a fast open queue if there's none.
1059 */
1060 if (getsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, &len) == 0 &&
1061 qlen != 0) {
1062 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &zero,
1063 sizeof(zero)) == -1) {
1064 msg = "cannot disable TCP_FASTOPEN";
1065 err |= ERR_WARN;
1066 }
1067 }
Willy Tarreau1c862c52012-10-05 16:21:00 +02001068 }
1069#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001070#if defined(IPV6_V6ONLY)
1071 if (listener->options & LI_O_V6ONLY)
1072 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +01001073 else if (listener->options & LI_O_V4V6)
1074 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001075#endif
1076
Willy Tarreau40aa0702013-03-10 23:51:38 +01001077 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +01001078 err |= ERR_RETRYABLE | ERR_ALERT;
1079 msg = "cannot bind socket";
1080 goto tcp_close_return;
1081 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001082
Willy Tarreau40aa0702013-03-10 23:51:38 +01001083 ready = 0;
1084 ready_len = sizeof(ready);
1085 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
1086 ready = 0;
1087
1088 if (!(ext && ready) && /* only listen if not already done by external process */
1089 listen(fd, listener->backlog ? listener->backlog : listener->maxconn) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +01001090 err |= ERR_RETRYABLE | ERR_ALERT;
1091 msg = "cannot listen to socket";
1092 goto tcp_close_return;
1093 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001094
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +04001095#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001096 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +09001097 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Olivier Houchard153659f2017-04-05 22:39:56 +02001098 else
1099 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau9ea05a72009-06-14 12:07:01 +02001100#endif
1101
Willy Tarreaue6b98942007-10-29 01:09:36 +01001102 /* the socket is ready */
1103 listener->fd = fd;
1104 listener->state = LI_LISTEN;
1105
Willy Tarreaueabf3132008-08-29 23:36:51 +02001106 fdtab[fd].owner = listener; /* reference the listener instead of a task */
Willy Tarreauaece46a2012-07-06 12:25:58 +02001107 fdtab[fd].iocb = listener->proto->accept;
Willy Tarreaueb472682010-05-28 18:46:57 +02001108 fd_insert(fd);
1109
Willy Tarreaue6b98942007-10-29 01:09:36 +01001110 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001111 if (msg && errlen) {
1112 char pn[INET6_ADDRSTRLEN];
1113
Willy Tarreau631f01c2011-09-05 00:36:48 +02001114 addr_to_str(&listener->addr, pn, sizeof(pn));
1115 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +01001116 }
Willy Tarreaue6b98942007-10-29 01:09:36 +01001117 return err;
1118
1119 tcp_close_return:
1120 close(fd);
1121 goto tcp_return;
1122}
1123
1124/* This function creates all TCP sockets bound to the protocol entry <proto>.
1125 * It is intended to be used as the protocol's bind_all() function.
1126 * The sockets will be registered but not added to any fd_set, in order not to
1127 * loose them across the fork(). A call to enable_all_listeners() is needed
1128 * to complete initialization. The return value is composed from ERR_*.
1129 */
Emeric Bruncf20bf12010-10-22 16:06:11 +02001130static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001131{
1132 struct listener *listener;
1133 int err = ERR_NONE;
1134
1135 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +02001136 err |= tcp_bind_listener(listener, errmsg, errlen);
1137 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001138 break;
1139 }
1140
1141 return err;
1142}
1143
Willy Tarreau32282382017-09-15 07:44:44 +02001144/* Add <listener> to the list of tcpv4 listeners, on port <port>. The
1145 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1146 * The number of listeners for the protocol is updated.
Willy Tarreaue6b98942007-10-29 01:09:36 +01001147 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001148static void tcpv4_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001149{
1150 if (listener->state != LI_INIT)
1151 return;
1152 listener->state = LI_ASSIGNED;
1153 listener->proto = &proto_tcpv4;
Willy Tarreau32282382017-09-15 07:44:44 +02001154 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001155 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
1156 proto_tcpv4.nb_listeners++;
1157}
1158
Willy Tarreau32282382017-09-15 07:44:44 +02001159/* Add <listener> to the list of tcpv6 listeners, on port <port>. The
1160 * listener's state is automatically updated from LI_INIT to LI_ASSIGNED.
1161 * The number of listeners for the protocol is updated.
Willy Tarreaue6b98942007-10-29 01:09:36 +01001162 */
Willy Tarreau9d5be5c2017-09-15 07:55:51 +02001163static void tcpv6_add_listener(struct listener *listener, int port)
Willy Tarreaue6b98942007-10-29 01:09:36 +01001164{
1165 if (listener->state != LI_INIT)
1166 return;
1167 listener->state = LI_ASSIGNED;
1168 listener->proto = &proto_tcpv6;
Willy Tarreau32282382017-09-15 07:44:44 +02001169 ((struct sockaddr_in *)(&listener->addr))->sin_port = htons(port);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001170 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
1171 proto_tcpv6.nb_listeners++;
1172}
1173
Willy Tarreau092d8652014-07-07 20:22:12 +02001174/* Pause a listener. Returns < 0 in case of failure, 0 if the listener
1175 * was totally stopped, or > 0 if correctly paused.
1176 */
1177int tcp_pause_listener(struct listener *l)
1178{
1179 if (shutdown(l->fd, SHUT_WR) != 0)
1180 return -1; /* Solaris dies here */
1181
1182 if (listen(l->fd, l->backlog ? l->backlog : l->maxconn) != 0)
1183 return -1; /* OpenBSD dies here */
1184
1185 if (shutdown(l->fd, SHUT_RD) != 0)
1186 return -1; /* should always be OK */
1187 return 1;
1188}
1189
William Lallemand2e785f22016-05-25 01:48:42 +02001190/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001191 * Execute the "set-src" action. May be called from {tcp,http}request.
1192 * It only changes the address and tries to preserve the original port. If the
1193 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand2e785f22016-05-25 01:48:42 +02001194 */
1195enum act_return tcp_action_req_set_src(struct act_rule *rule, struct proxy *px,
1196 struct session *sess, struct stream *s, int flags)
1197{
1198 struct connection *cli_conn;
1199
1200 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1201 struct sample *smp;
1202
1203 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1204 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001205 int port = get_net_port(&cli_conn->addr.from);
1206
William Lallemand2e785f22016-05-25 01:48:42 +02001207 if (smp->data.type == SMP_T_IPV4) {
1208 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_family = AF_INET;
1209 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001210 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001211 } else if (smp->data.type == SMP_T_IPV6) {
1212 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_family = AF_INET6;
1213 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 +02001214 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_port = port;
William Lallemand2e785f22016-05-25 01:48:42 +02001215 }
1216 }
William Lallemand01252ed2016-05-25 02:33:16 +02001217 cli_conn->flags |= CO_FL_ADDR_FROM_SET;
William Lallemand2e785f22016-05-25 01:48:42 +02001218 }
1219 return ACT_RET_CONT;
1220}
1221
William Lallemand44be6402016-05-25 01:51:35 +02001222/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001223 * Execute the "set-dst" action. May be called from {tcp,http}request.
1224 * It only changes the address and tries to preserve the original port. If the
1225 * previous family was neither AF_INET nor AF_INET6, the port is set to zero.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001226 */
1227enum act_return tcp_action_req_set_dst(struct act_rule *rule, struct proxy *px,
1228 struct session *sess, struct stream *s, int flags)
1229{
1230 struct connection *cli_conn;
1231
1232 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1233 struct sample *smp;
1234
1235 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_ADDR);
1236 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001237 int port = get_net_port(&cli_conn->addr.to);
1238
William Lallemand13e9b0c2016-05-25 02:34:07 +02001239 if (smp->data.type == SMP_T_IPV4) {
1240 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_family = AF_INET;
1241 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr = smp->data.u.ipv4.s_addr;
1242 } else if (smp->data.type == SMP_T_IPV6) {
1243 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_family = AF_INET6;
1244 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 +02001245 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_port = port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001246 }
1247 cli_conn->flags |= CO_FL_ADDR_TO_SET;
1248 }
1249 }
1250 return ACT_RET_CONT;
1251}
1252
1253/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001254 * Execute the "set-src-port" action. May be called from {tcp,http}request.
1255 * We must test the sin_family before setting the port. If the address family
1256 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1257 * and the port is assigned.
William Lallemand44be6402016-05-25 01:51:35 +02001258 */
1259enum act_return tcp_action_req_set_src_port(struct act_rule *rule, struct proxy *px,
1260 struct session *sess, struct stream *s, int flags)
1261{
1262 struct connection *cli_conn;
1263
1264 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1265 struct sample *smp;
1266
1267 conn_get_from_addr(cli_conn);
1268
1269 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1270 if (smp) {
Willy Tarreau00005ce2016-10-21 15:07:45 +02001271 if (cli_conn->addr.from.ss_family == AF_INET6) {
William Lallemand44be6402016-05-25 01:51:35 +02001272 ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001273 } else {
1274 if (cli_conn->addr.from.ss_family != AF_INET) {
1275 cli_conn->addr.from.ss_family = AF_INET;
1276 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr = 0;
1277 }
1278 ((struct sockaddr_in *)&cli_conn->addr.from)->sin_port = htons(smp->data.u.sint);
William Lallemand44be6402016-05-25 01:51:35 +02001279 }
1280 }
1281 }
1282 return ACT_RET_CONT;
1283}
1284
William Lallemand13e9b0c2016-05-25 02:34:07 +02001285/*
Willy Tarreau00005ce2016-10-21 15:07:45 +02001286 * Execute the "set-dst-port" action. May be called from {tcp,http}request.
1287 * We must test the sin_family before setting the port. If the address family
1288 * is neither AF_INET nor AF_INET6, the address is forced to AF_INET "0.0.0.0"
1289 * and the port is assigned.
William Lallemand13e9b0c2016-05-25 02:34:07 +02001290 */
1291enum act_return tcp_action_req_set_dst_port(struct act_rule *rule, struct proxy *px,
1292 struct session *sess, struct stream *s, int flags)
1293{
1294 struct connection *cli_conn;
1295
1296 if ((cli_conn = objt_conn(sess->origin)) && conn_ctrl_ready(cli_conn)) {
1297 struct sample *smp;
1298
1299 conn_get_to_addr(cli_conn);
1300
1301 smp = sample_fetch_as_type(px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.expr, SMP_T_SINT);
1302 if (smp) {
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001303 if (cli_conn->addr.to.ss_family == AF_INET6) {
1304 ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_port = htons(smp->data.u.sint);
Willy Tarreau00005ce2016-10-21 15:07:45 +02001305 } else {
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001306 if (cli_conn->addr.to.ss_family != AF_INET) {
1307 cli_conn->addr.to.ss_family = AF_INET;
1308 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr = 0;
Willy Tarreau00005ce2016-10-21 15:07:45 +02001309 }
Baptiste Assmann46392fd2017-10-03 23:16:36 +02001310 ((struct sockaddr_in *)&cli_conn->addr.to)->sin_port = htons(smp->data.u.sint);
William Lallemand13e9b0c2016-05-25 02:34:07 +02001311 }
1312 }
1313 }
1314 return ACT_RET_CONT;
1315}
1316
Willy Tarreau2d392c22015-08-24 01:43:45 +02001317/* Executes the "silent-drop" action. May be called from {tcp,http}{request,response} */
1318static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct proxy *px, struct session *sess, struct stream *strm, int flags)
1319{
1320 struct connection *conn = objt_conn(sess->origin);
1321
1322 if (!conn)
1323 goto out;
1324
1325 if (!conn_ctrl_ready(conn))
1326 goto out;
1327
Willy Tarreau2d392c22015-08-24 01:43:45 +02001328#ifdef TCP_QUICKACK
Willy Tarreaufc2a2d92015-09-29 18:15:01 +02001329 /* drain is needed only to send the quick ACK */
1330 conn_sock_drain(conn);
1331
Willy Tarreau2d392c22015-08-24 01:43:45 +02001332 /* re-enable quickack if it was disabled to ack all data and avoid
1333 * retransmits from the client that might trigger a real reset.
1334 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001335 setsockopt(conn->handle.fd, SOL_TCP, TCP_QUICKACK, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001336#endif
1337 /* lingering must absolutely be disabled so that we don't send a
1338 * shutdown(), this is critical to the TCP_REPAIR trick. When no stream
1339 * is present, returning with ERR will cause lingering to be disabled.
1340 */
1341 if (strm)
1342 strm->si[0].flags |= SI_FL_NOLINGER;
1343
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001344 /* We're on the client-facing side, we must force to disable lingering to
1345 * ensure we will use an RST exclusively and kill any pending data.
1346 */
Willy Tarreau585744b2017-08-24 14:31:19 +02001347 fdtab[conn->handle.fd].linger_risk = 1;
Willy Tarreauf50ec0f2015-09-29 18:11:32 +02001348
Willy Tarreau2d392c22015-08-24 01:43:45 +02001349#ifdef TCP_REPAIR
Willy Tarreau585744b2017-08-24 14:31:19 +02001350 if (setsockopt(conn->handle.fd, SOL_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
Willy Tarreau2d392c22015-08-24 01:43:45 +02001351 /* socket will be quiet now */
1352 goto out;
1353 }
1354#endif
1355 /* either TCP_REPAIR is not defined or it failed (eg: permissions).
1356 * Let's fall back on the TTL trick, though it only works for routed
1357 * network and has no effect on local net.
1358 */
1359#ifdef IP_TTL
Willy Tarreau585744b2017-08-24 14:31:19 +02001360 setsockopt(conn->handle.fd, SOL_IP, IP_TTL, &one, sizeof(one));
Willy Tarreau2d392c22015-08-24 01:43:45 +02001361#endif
1362 out:
1363 /* kill the stream if any */
1364 if (strm) {
1365 channel_abort(&strm->req);
1366 channel_abort(&strm->res);
1367 strm->req.analysers = 0;
1368 strm->res.analysers = 0;
1369 strm->be->be_counters.denied_req++;
1370 if (!(strm->flags & SF_ERR_MASK))
1371 strm->flags |= SF_ERR_PRXCOND;
1372 if (!(strm->flags & SF_FINST_MASK))
1373 strm->flags |= SF_FINST_R;
1374 }
1375
1376 sess->fe->fe_counters.denied_req++;
1377 if (sess->listener->counters)
1378 sess->listener->counters->denied_req++;
1379
1380 return ACT_RET_STOP;
1381}
1382
William Lallemand13e9b0c2016-05-25 02:34:07 +02001383/* parse "set-{src,dst}[-port]" action */
1384enum 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 +02001385{
1386 int cur_arg;
1387 struct sample_expr *expr;
1388 unsigned int where;
1389
1390 cur_arg = *orig_arg;
1391 expr = sample_parse_expr((char **)args, &cur_arg, px->conf.args.file, px->conf.args.line, err, &px->conf.args);
1392 if (!expr)
1393 return ACT_RET_PRS_ERR;
1394
1395 where = 0;
1396 if (proxy->cap & PR_CAP_FE)
1397 where |= SMP_VAL_FE_HRQ_HDR;
1398 if (proxy->cap & PR_CAP_BE)
1399 where |= SMP_VAL_BE_HRQ_HDR;
1400
1401 if (!(expr->fetch->val & where)) {
1402 memprintf(err,
1403 "fetch method '%s' extracts information from '%s', none of which is available here",
1404 args[cur_arg-1], sample_src_names(expr->fetch->use));
1405 free(expr);
1406 return ACT_RET_PRS_ERR;
1407 }
1408 rule->arg.expr = expr;
1409 rule->action = ACT_CUSTOM;
1410
1411 if (!strcmp(args[*orig_arg-1], "set-src")) {
1412 rule->action_ptr = tcp_action_req_set_src;
William Lallemand44be6402016-05-25 01:51:35 +02001413 } else if (!strcmp(args[*orig_arg-1], "set-src-port")) {
1414 rule->action_ptr = tcp_action_req_set_src_port;
William Lallemand13e9b0c2016-05-25 02:34:07 +02001415 } else if (!strcmp(args[*orig_arg-1], "set-dst")) {
1416 rule->action_ptr = tcp_action_req_set_dst;
1417 } else if (!strcmp(args[*orig_arg-1], "set-dst-port")) {
1418 rule->action_ptr = tcp_action_req_set_dst_port;
William Lallemand2e785f22016-05-25 01:48:42 +02001419 } else {
1420 return ACT_RET_PRS_ERR;
1421 }
1422
1423 (*orig_arg)++;
1424
1425 return ACT_RET_PRS_OK;
1426}
1427
1428
Willy Tarreau2d392c22015-08-24 01:43:45 +02001429/* Parse a "silent-drop" action. It takes no argument. It returns ACT_RET_PRS_OK on
1430 * success, ACT_RET_PRS_ERR on error.
1431 */
1432static enum act_parse_ret tcp_parse_silent_drop(const char **args, int *orig_arg, struct proxy *px,
1433 struct act_rule *rule, char **err)
1434{
1435 rule->action = ACT_CUSTOM;
1436 rule->action_ptr = tcp_exec_action_silent_drop;
1437 return ACT_RET_PRS_OK;
1438}
1439
Willy Tarreau645513a2010-05-24 20:55:15 +02001440
1441/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001442/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02001443/************************************************************************/
1444
Willy Tarreau4a129812012-04-25 17:31:42 +02001445/* fetch the connection's source IPv4/IPv6 address */
Thierry FOURNIERa123ad82015-07-24 09:12:15 +02001446int smp_fetch_src(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001447{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001448 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001449
1450 if (!cli_conn)
1451 return 0;
1452
1453 switch (cli_conn->addr.from.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001454 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001455 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001456 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001457 break;
1458 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001459 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001460 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001461 break;
1462 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001463 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001464 }
Emeric Brunf769f512010-10-22 17:14:01 +02001465
Willy Tarreau37406352012-04-23 16:16:37 +02001466 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001467 return 1;
1468}
1469
Willy Tarreaua5e37562011-12-16 17:06:15 +01001470/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001471static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001472smp_fetch_sport(const struct arg *args, struct sample *smp, const char *k, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001473{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001474 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001475
1476 if (!cli_conn)
1477 return 0;
1478
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001479 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001480 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.from)))
Emeric Brunf769f512010-10-22 17:14:01 +02001481 return 0;
1482
Willy Tarreau37406352012-04-23 16:16:37 +02001483 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001484 return 1;
1485}
1486
Willy Tarreau4a129812012-04-25 17:31:42 +02001487/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001488static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001489smp_fetch_dst(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001490{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001491 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreau645513a2010-05-24 20:55:15 +02001492
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001493 if (!cli_conn)
1494 return 0;
1495
1496 conn_get_to_addr(cli_conn);
1497
1498 switch (cli_conn->addr.to.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001499 case AF_INET:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001500 smp->data.u.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001501 smp->data.type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001502 break;
1503 case AF_INET6:
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001504 smp->data.u.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001505 smp->data.type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001506 break;
1507 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001508 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001509 }
Emeric Brunf769f512010-10-22 17:14:01 +02001510
Willy Tarreau37406352012-04-23 16:16:37 +02001511 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001512 return 1;
1513}
1514
Willy Tarreau16e01562016-08-09 16:46:18 +02001515/* check if the destination address of the front connection is local to the
1516 * system or if it was intercepted.
1517 */
1518int smp_fetch_dst_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1519{
1520 struct connection *conn = objt_conn(smp->sess->origin);
1521 struct listener *li = smp->sess->listener;
1522
1523 if (!conn)
1524 return 0;
1525
1526 conn_get_to_addr(conn);
1527 if (!(conn->flags & CO_FL_ADDR_TO_SET))
1528 return 0;
1529
1530 smp->data.type = SMP_T_BOOL;
1531 smp->flags = 0;
1532 smp->data.u.sint = addr_is_local(li->netns, &conn->addr.to);
1533 return smp->data.u.sint >= 0;
1534}
1535
1536/* check if the source address of the front connection is local to the system
1537 * or not.
1538 */
1539int smp_fetch_src_is_local(const struct arg *args, struct sample *smp, const char *kw, void *private)
1540{
1541 struct connection *conn = objt_conn(smp->sess->origin);
1542 struct listener *li = smp->sess->listener;
1543
1544 if (!conn)
1545 return 0;
1546
1547 conn_get_from_addr(conn);
1548 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
1549 return 0;
1550
1551 smp->data.type = SMP_T_BOOL;
1552 smp->flags = 0;
1553 smp->data.u.sint = addr_is_local(li->netns, &conn->addr.from);
1554 return smp->data.u.sint >= 0;
1555}
1556
Willy Tarreaua5e37562011-12-16 17:06:15 +01001557/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001558static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02001559smp_fetch_dport(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau645513a2010-05-24 20:55:15 +02001560{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02001561 struct connection *cli_conn = objt_conn(smp->sess->origin);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001562
1563 if (!cli_conn)
1564 return 0;
1565
1566 conn_get_to_addr(cli_conn);
Willy Tarreau645513a2010-05-24 20:55:15 +02001567
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02001568 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02001569 if (!(smp->data.u.sint = get_host_port(&cli_conn->addr.to)))
Emeric Brunf769f512010-10-22 17:14:01 +02001570 return 0;
1571
Willy Tarreau37406352012-04-23 16:16:37 +02001572 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001573 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01001574}
1575
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001576#ifdef TCP_INFO
1577
1578/* Returns some tcp_info data is its avalaible. "dir" must be set to 0 if
1579 * the client connection is require, otherwise it is set to 1. "val" represents
1580 * the required value. Use 0 for rtt and 1 for rttavg. "unit" is the expected unit
1581 * by default, the rtt is in us. Id "unit" is set to 0, the unit is us, if it is
1582 * set to 1, the untis are milliseconds.
1583 * If the function fails it returns 0, otherwise it returns 1 and "result" is filled.
1584 */
1585static inline int get_tcp_info(const struct arg *args, struct sample *smp,
1586 int dir, int val)
1587{
1588 struct connection *conn;
1589 struct tcp_info info;
1590 socklen_t optlen;
1591
1592 /* strm can be null. */
1593 if (!smp->strm)
1594 return 0;
1595
1596 /* get the object associated with the stream interface.The
1597 * object can be other thing than a connection. For example,
1598 * it be a appctx. */
1599 conn = objt_conn(smp->strm->si[dir].end);
1600 if (!conn)
1601 return 0;
1602
1603 /* The fd may not be avalaible for the tcp_info struct, and the
1604 syscal can fail. */
1605 optlen = sizeof(info);
Willy Tarreau585744b2017-08-24 14:31:19 +02001606 if (getsockopt(conn->handle.fd, SOL_TCP, TCP_INFO, &info, &optlen) == -1)
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001607 return 0;
1608
1609 /* extract the value. */
1610 smp->data.type = SMP_T_SINT;
1611 switch (val) {
Joe Williams30fcd392016-08-10 07:06:44 -07001612 case 0: smp->data.u.sint = info.tcpi_rtt; break;
1613 case 1: smp->data.u.sint = info.tcpi_rttvar; break;
1614#if defined(__linux__)
1615 /* these ones are common to all Linux versions */
1616 case 2: smp->data.u.sint = info.tcpi_unacked; break;
1617 case 3: smp->data.u.sint = info.tcpi_sacked; break;
1618 case 4: smp->data.u.sint = info.tcpi_lost; break;
1619 case 5: smp->data.u.sint = info.tcpi_retrans; break;
1620 case 6: smp->data.u.sint = info.tcpi_fackets; break;
1621 case 7: smp->data.u.sint = info.tcpi_reordering; break;
1622#elif defined(__FreeBSD__) || defined(__NetBSD__)
1623 /* the ones are found on FreeBSD and NetBSD featuring TCP_INFO */
1624 case 2: smp->data.u.sint = info.__tcpi_unacked; break;
1625 case 3: smp->data.u.sint = info.__tcpi_sacked; break;
1626 case 4: smp->data.u.sint = info.__tcpi_lost; break;
1627 case 5: smp->data.u.sint = info.__tcpi_retrans; break;
1628 case 6: smp->data.u.sint = info.__tcpi_fackets; break;
1629 case 7: smp->data.u.sint = info.__tcpi_reordering; break;
1630#endif
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001631 default: return 0;
1632 }
1633
1634 /* Convert the value as expected. */
1635 if (args) {
1636 if (args[0].type == ARGT_STR) {
1637 if (strcmp(args[0].data.str.str, "us") == 0) {
1638 /* Do nothing. */
1639 } else if (strcmp(args[0].data.str.str, "ms") == 0) {
1640 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1641 } else
1642 return 0;
1643 } else if (args[0].type == ARGT_STOP) {
1644 smp->data.u.sint = (smp->data.u.sint + 500) / 1000;
1645 } else
1646 return 0;
1647 }
1648
1649 return 1;
1650}
1651
1652/* get the mean rtt of a client connexion */
1653static int
1654smp_fetch_fc_rtt(const struct arg *args, struct sample *smp, const char *kw, void *private)
1655{
1656 if (!get_tcp_info(args, smp, 0, 0))
1657 return 0;
1658 return 1;
1659}
1660
1661/* get the variance of the mean rtt of a client connexion */
1662static int
1663smp_fetch_fc_rttvar(const struct arg *args, struct sample *smp, const char *kw, void *private)
1664{
1665 if (!get_tcp_info(args, smp, 0, 1))
1666 return 0;
1667 return 1;
1668}
Joe Williams30fcd392016-08-10 07:06:44 -07001669
1670#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1671
1672/* get the unacked counter on a client connexion */
1673static int
1674smp_fetch_fc_unacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1675{
1676 if (!get_tcp_info(args, smp, 0, 2))
1677 return 0;
1678 return 1;
1679}
1680
1681/* get the sacked counter on a client connexion */
1682static int
1683smp_fetch_fc_sacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
1684{
1685 if (!get_tcp_info(args, smp, 0, 3))
1686 return 0;
1687 return 1;
1688}
1689
1690/* get the lost counter on a client connexion */
1691static int
1692smp_fetch_fc_lost(const struct arg *args, struct sample *smp, const char *kw, void *private)
1693{
1694 if (!get_tcp_info(args, smp, 0, 4))
1695 return 0;
1696 return 1;
1697}
1698
1699/* get the retrans counter on a client connexion */
1700static int
1701smp_fetch_fc_retrans(const struct arg *args, struct sample *smp, const char *kw, void *private)
1702{
1703 if (!get_tcp_info(args, smp, 0, 5))
1704 return 0;
1705 return 1;
1706}
1707
1708/* get the fackets counter on a client connexion */
1709static int
1710smp_fetch_fc_fackets(const struct arg *args, struct sample *smp, const char *kw, void *private)
1711{
1712 if (!get_tcp_info(args, smp, 0, 6))
1713 return 0;
1714 return 1;
1715}
1716
1717/* get the reordering counter on a client connexion */
1718static int
1719smp_fetch_fc_reordering(const struct arg *args, struct sample *smp, const char *kw, void *private)
1720{
1721 if (!get_tcp_info(args, smp, 0, 7))
1722 return 0;
1723 return 1;
1724}
1725#endif // linux || freebsd || netbsd
1726#endif // TCP_INFO
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001727
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001728#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001729/* parse the "v4v6" bind keyword */
1730static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1731{
1732 struct listener *l;
1733
1734 list_for_each_entry(l, &conf->listeners, by_bind) {
1735 if (l->addr.ss_family == AF_INET6)
1736 l->options |= LI_O_V4V6;
1737 }
1738
1739 return 0;
1740}
1741
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001742/* parse the "v6only" bind keyword */
1743static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1744{
1745 struct listener *l;
1746
1747 list_for_each_entry(l, &conf->listeners, by_bind) {
1748 if (l->addr.ss_family == AF_INET6)
1749 l->options |= LI_O_V6ONLY;
1750 }
1751
1752 return 0;
1753}
1754#endif
1755
Pieter Baauwd551fb52013-05-08 22:49:23 +02001756#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001757/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001758static 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 +02001759{
1760 struct listener *l;
1761
Willy Tarreau4348fad2012-09-20 16:48:07 +02001762 list_for_each_entry(l, &conf->listeners, by_bind) {
1763 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1764 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02001765 }
1766
Willy Tarreau44791242012-09-12 23:27:21 +02001767 return 0;
1768}
1769#endif
1770
1771#ifdef TCP_DEFER_ACCEPT
1772/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001773static 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 +02001774{
1775 struct listener *l;
1776
Willy Tarreau4348fad2012-09-20 16:48:07 +02001777 list_for_each_entry(l, &conf->listeners, by_bind) {
1778 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1779 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02001780 }
1781
Willy Tarreau44791242012-09-12 23:27:21 +02001782 return 0;
1783}
1784#endif
1785
Willy Tarreau1c862c52012-10-05 16:21:00 +02001786#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01001787/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02001788static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1789{
1790 struct listener *l;
1791
1792 list_for_each_entry(l, &conf->listeners, by_bind) {
1793 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1794 l->options |= LI_O_TCP_FO;
1795 }
1796
1797 return 0;
1798}
1799#endif
1800
Willy Tarreau44791242012-09-12 23:27:21 +02001801#ifdef TCP_MAXSEG
1802/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001803static 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 +02001804{
1805 struct listener *l;
1806 int mss;
1807
Willy Tarreau44791242012-09-12 23:27:21 +02001808 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001809 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001810 return ERR_ALERT | ERR_FATAL;
1811 }
1812
1813 mss = atoi(args[cur_arg + 1]);
1814 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001815 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001816 return ERR_ALERT | ERR_FATAL;
1817 }
1818
Willy Tarreau4348fad2012-09-20 16:48:07 +02001819 list_for_each_entry(l, &conf->listeners, by_bind) {
1820 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1821 l->maxseg = mss;
1822 }
Willy Tarreau44791242012-09-12 23:27:21 +02001823
1824 return 0;
1825}
1826#endif
1827
Willy Tarreau2af207a2015-02-04 00:45:58 +01001828#ifdef TCP_USER_TIMEOUT
1829/* parse the "tcp-ut" bind keyword */
1830static int bind_parse_tcp_ut(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1831{
1832 const char *ptr = NULL;
1833 struct listener *l;
1834 unsigned int timeout;
1835
1836 if (!*args[cur_arg + 1]) {
1837 memprintf(err, "'%s' : missing TCP User Timeout value", args[cur_arg]);
1838 return ERR_ALERT | ERR_FATAL;
1839 }
1840
1841 ptr = parse_time_err(args[cur_arg + 1], &timeout, TIME_UNIT_MS);
1842 if (ptr) {
1843 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[cur_arg]);
1844 return ERR_ALERT | ERR_FATAL;
1845 }
1846
1847 list_for_each_entry(l, &conf->listeners, by_bind) {
1848 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1849 l->tcp_ut = timeout;
1850 }
1851
1852 return 0;
1853}
1854#endif
1855
Willy Tarreau44791242012-09-12 23:27:21 +02001856#ifdef SO_BINDTODEVICE
Willy Tarreau2af207a2015-02-04 00:45:58 +01001857/* parse the "interface" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001858static 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 +02001859{
1860 struct listener *l;
1861
Willy Tarreau44791242012-09-12 23:27:21 +02001862 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001863 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001864 return ERR_ALERT | ERR_FATAL;
1865 }
1866
Willy Tarreau4348fad2012-09-20 16:48:07 +02001867 list_for_each_entry(l, &conf->listeners, by_bind) {
1868 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1869 l->interface = strdup(args[cur_arg + 1]);
1870 }
Willy Tarreau44791242012-09-12 23:27:21 +02001871
Willy Tarreau44791242012-09-12 23:27:21 +02001872 return 0;
1873}
1874#endif
1875
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001876#ifdef CONFIG_HAP_NS
1877/* parse the "namespace" bind keyword */
1878static int bind_parse_namespace(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1879{
1880 struct listener *l;
1881 char *namespace = NULL;
1882
1883 if (!*args[cur_arg + 1]) {
1884 memprintf(err, "'%s' : missing namespace id", args[cur_arg]);
1885 return ERR_ALERT | ERR_FATAL;
1886 }
1887 namespace = args[cur_arg + 1];
1888
1889 list_for_each_entry(l, &conf->listeners, by_bind) {
1890 l->netns = netns_store_lookup(namespace, strlen(namespace));
1891
1892 if (l->netns == NULL)
1893 l->netns = netns_store_insert(namespace);
1894
1895 if (l->netns == NULL) {
1896 Alert("Cannot open namespace '%s'.\n", args[cur_arg + 1]);
1897 return ERR_ALERT | ERR_FATAL;
1898 }
1899 }
1900 return 0;
1901}
1902#endif
1903
Willy Tarreau163d4622015-10-13 16:16:41 +02001904#ifdef TCP_USER_TIMEOUT
1905/* parse the "tcp-ut" server keyword */
1906static int srv_parse_tcp_ut(char **args, int *cur_arg, struct proxy *px, struct server *newsrv, char **err)
1907{
1908 const char *ptr = NULL;
1909 unsigned int timeout;
1910
1911 if (!*args[*cur_arg + 1]) {
1912 memprintf(err, "'%s' : missing TCP User Timeout value", args[*cur_arg]);
1913 return ERR_ALERT | ERR_FATAL;
1914 }
1915
1916 ptr = parse_time_err(args[*cur_arg + 1], &timeout, TIME_UNIT_MS);
1917 if (ptr) {
1918 memprintf(err, "'%s' : expects a positive delay in milliseconds", args[*cur_arg]);
1919 return ERR_ALERT | ERR_FATAL;
1920 }
1921
1922 if (newsrv->addr.ss_family == AF_INET || newsrv->addr.ss_family == AF_INET6)
1923 newsrv->tcp_ut = timeout;
1924
1925 return 0;
1926}
1927#endif
1928
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001929
Willy Tarreau4a129812012-04-25 17:31:42 +02001930/* Note: must not be declared <const> as its list will be overwritten.
1931 * Note: fetches that may return multiple types must be declared as the lowest
1932 * common denominator, the type that can be casted into all other ones. For
1933 * instance v4/v6 must be declared v4.
1934 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02001935static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001936 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001937 { "dst_is_local", smp_fetch_dst_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001938 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001939 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
Willy Tarreau16e01562016-08-09 16:46:18 +02001940 { "src_is_local", smp_fetch_src_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02001941 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
Thierry Fournier / OZON.IO6310bef2016-07-24 20:16:50 +02001942#ifdef TCP_INFO
Joe Williams30fcd392016-08-10 07:06:44 -07001943 { "fc_rtt", smp_fetch_fc_rtt, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1944 { "fc_rttvar", smp_fetch_fc_rttvar, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1945#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
1946 { "fc_unacked", smp_fetch_fc_unacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1947 { "fc_sacked", smp_fetch_fc_sacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1948 { "fc_retrans", smp_fetch_fc_retrans, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1949 { "fc_fackets", smp_fetch_fc_fackets, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1950 { "fc_lost", smp_fetch_fc_lost, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1951 { "fc_reordering", smp_fetch_fc_reordering, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
1952#endif // linux || freebsd || netbsd
1953#endif // TCP_INFO
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001954 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02001955}};
1956
Willy Tarreau44791242012-09-12 23:27:21 +02001957/************************************************************************/
1958/* All supported bind keywords must be declared here. */
1959/************************************************************************/
1960
1961/* Note: must not be declared <const> as its list will be overwritten.
1962 * Please take care of keeping this list alphabetically sorted, doing so helps
1963 * all code contributors.
1964 * Optional keywords are also declared with a NULL ->parse() function so that
1965 * the config parser can report an appropriate error when a known keyword was
1966 * not enabled.
1967 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02001968static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02001969#ifdef TCP_DEFER_ACCEPT
1970 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
1971#endif
1972#ifdef SO_BINDTODEVICE
1973 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
1974#endif
1975#ifdef TCP_MAXSEG
1976 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
1977#endif
Willy Tarreau2af207a2015-02-04 00:45:58 +01001978#ifdef TCP_USER_TIMEOUT
1979 { "tcp-ut", bind_parse_tcp_ut, 1 }, /* set User Timeout on listening socket */
1980#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001981#ifdef TCP_FASTOPEN
1982 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
1983#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02001984#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001985 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
1986#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001987#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001988 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001989 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
1990#endif
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +01001991#ifdef CONFIG_HAP_NS
1992 { "namespace", bind_parse_namespace, 1 },
1993#endif
Willy Tarreau44791242012-09-12 23:27:21 +02001994 /* the versions with the NULL parse function*/
1995 { "defer-accept", NULL, 0 },
1996 { "interface", NULL, 1 },
1997 { "mss", NULL, 1 },
1998 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01001999 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01002000 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02002001 { NULL, NULL, 0 },
2002}};
2003
Willy Tarreau163d4622015-10-13 16:16:41 +02002004static struct srv_kw_list srv_kws = { "TCP", { }, {
2005#ifdef TCP_USER_TIMEOUT
Frédéric Lécaille5c3cd972017-03-15 16:36:09 +01002006 { "tcp-ut", srv_parse_tcp_ut, 1, 1 }, /* set TCP user timeout on server */
Willy Tarreau163d4622015-10-13 16:16:41 +02002007#endif
2008 { NULL, NULL, 0 },
2009}};
Willy Tarreau2d392c22015-08-24 01:43:45 +02002010
2011static struct action_kw_list tcp_req_conn_actions = {ILH, {
William Lallemand2e785f22016-05-25 01:48:42 +02002012 { "silent-drop", tcp_parse_silent_drop },
William Lallemand13e9b0c2016-05-25 02:34:07 +02002013 { "set-src", tcp_parse_set_src_dst },
2014 { "set-src-port", tcp_parse_set_src_dst },
2015 { "set-dst" , tcp_parse_set_src_dst },
2016 { "set-dst-port", tcp_parse_set_src_dst },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002017 { /* END */ }
2018}};
2019
Willy Tarreau620408f2016-10-21 16:37:51 +02002020static struct action_kw_list tcp_req_sess_actions = {ILH, {
2021 { "silent-drop", tcp_parse_silent_drop },
2022 { "set-src", tcp_parse_set_src_dst },
2023 { "set-src-port", tcp_parse_set_src_dst },
2024 { "set-dst" , tcp_parse_set_src_dst },
2025 { "set-dst-port", tcp_parse_set_src_dst },
2026 { /* END */ }
2027}};
2028
Willy Tarreau2d392c22015-08-24 01:43:45 +02002029static struct action_kw_list tcp_req_cont_actions = {ILH, {
2030 { "silent-drop", tcp_parse_silent_drop },
2031 { /* END */ }
2032}};
2033
2034static struct action_kw_list tcp_res_cont_actions = {ILH, {
2035 { "silent-drop", tcp_parse_silent_drop },
2036 { /* END */ }
2037}};
2038
2039static struct action_kw_list http_req_actions = {ILH, {
William Lallemand2e785f22016-05-25 01:48:42 +02002040 { "silent-drop", tcp_parse_silent_drop },
William Lallemand13e9b0c2016-05-25 02:34:07 +02002041 { "set-src", tcp_parse_set_src_dst },
2042 { "set-src-port", tcp_parse_set_src_dst },
2043 { "set-dst", tcp_parse_set_src_dst },
2044 { "set-dst-port", tcp_parse_set_src_dst },
Willy Tarreau2d392c22015-08-24 01:43:45 +02002045 { /* END */ }
2046}};
2047
2048static struct action_kw_list http_res_actions = {ILH, {
2049 { "silent-drop", tcp_parse_silent_drop },
2050 { /* END */ }
2051}};
2052
2053
Willy Tarreaue6b98942007-10-29 01:09:36 +01002054__attribute__((constructor))
2055static void __tcp_protocol_init(void)
2056{
2057 protocol_register(&proto_tcpv4);
2058 protocol_register(&proto_tcpv6);
Willy Tarreau12785782012-04-27 21:37:17 +02002059 sample_register_fetches(&sample_fetch_keywords);
Willy Tarreau44791242012-09-12 23:27:21 +02002060 bind_register_keywords(&bind_kws);
Willy Tarreau163d4622015-10-13 16:16:41 +02002061 srv_register_keywords(&srv_kws);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002062 tcp_req_conn_keywords_register(&tcp_req_conn_actions);
Willy Tarreau620408f2016-10-21 16:37:51 +02002063 tcp_req_sess_keywords_register(&tcp_req_sess_actions);
Willy Tarreau2d392c22015-08-24 01:43:45 +02002064 tcp_req_cont_keywords_register(&tcp_req_cont_actions);
2065 tcp_res_cont_keywords_register(&tcp_res_cont_actions);
2066 http_req_keywords_register(&http_req_actions);
2067 http_res_keywords_register(&http_res_actions);
Willy Tarreauba962912016-12-21 18:55:02 +01002068
2069
2070 hap_register_build_opts("Built with transparent proxy support using:"
2071#if defined(IP_TRANSPARENT)
2072 " IP_TRANSPARENT"
2073#endif
2074#if defined(IPV6_TRANSPARENT)
2075 " IPV6_TRANSPARENT"
2076#endif
2077#if defined(IP_FREEBIND)
2078 " IP_FREEBIND"
2079#endif
2080#if defined(IP_BINDANY)
2081 " IP_BINDANY"
2082#endif
2083#if defined(IPV6_BINDANY)
2084 " IPV6_BINDANY"
2085#endif
2086#if defined(SO_BINDANY)
2087 " SO_BINDANY"
2088#endif
2089 "", 0);
Willy Tarreaue6b98942007-10-29 01:09:36 +01002090}
2091
2092
2093/*
2094 * Local variables:
2095 * c-indent-level: 8
2096 * c-basic-offset: 8
2097 * End:
2098 */