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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
13#include <ctype.h>
14#include <errno.h>
15#include <fcntl.h>
16#include <stdio.h>
17#include <stdlib.h>
18#include <string.h>
19#include <time.h>
20
21#include <sys/param.h>
22#include <sys/socket.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <sys/un.h>
26
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040027#include <netinet/tcp.h>
28
Willy Tarreaub6866442008-07-14 23:54:42 +020029#include <common/cfgparse.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010030#include <common/compat.h>
31#include <common/config.h>
32#include <common/debug.h>
33#include <common/errors.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010034#include <common/mini-clist.h>
35#include <common/standard.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010036
Willy Tarreaue6b98942007-10-29 01:09:36 +010037#include <types/global.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020038#include <types/server.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010039
40#include <proto/acl.h>
Willy Tarreau9fcb9842012-04-20 14:45:49 +020041#include <proto/arg.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020042#include <proto/channel.h>
Willy Tarreaud2274c62012-07-06 14:29:45 +020043#include <proto/connection.h>
Willy Tarreaudd2f85e2012-09-02 22:34:23 +020044#include <proto/fd.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020045#include <proto/listener.h>
Willy Tarreau9650f372009-08-16 14:02:45 +020046#include <proto/log.h>
47#include <proto/port_range.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020048#include <proto/protocol.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010049#include <proto/proto_tcp.h>
Willy Tarreaub6866442008-07-14 23:54:42 +020050#include <proto/proxy.h>
Willy Tarreaucd3b0942012-04-27 21:52:18 +020051#include <proto/sample.h>
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +020052#include <proto/session.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020053#include <proto/stick_table.h>
Willy Tarreaucc1e04b2013-09-11 23:20:29 +020054#include <proto/stream_interface.h>
Willy Tarreaua975b8f2010-06-05 19:13:27 +020055#include <proto/task.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010056
Willy Tarreaue8c66af2008-01-13 18:40:14 +010057#ifdef CONFIG_HAP_CTTPROXY
58#include <import/ip_tproxy.h>
59#endif
60
Emeric Bruncf20bf12010-10-22 16:06:11 +020061static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen);
62static int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen);
Willy Tarreaue6b98942007-10-29 01:09:36 +010063
64/* Note: must not be declared <const> as its list will be overwritten */
65static struct protocol proto_tcpv4 = {
66 .name = "tcpv4",
67 .sock_domain = AF_INET,
68 .sock_type = SOCK_STREAM,
69 .sock_prot = IPPROTO_TCP,
70 .sock_family = AF_INET,
71 .sock_addrlen = sizeof(struct sockaddr_in),
72 .l3_addrlen = 32/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020073 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020074 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020075 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010076 .bind_all = tcp_bind_listeners,
77 .unbind_all = unbind_all_listeners,
78 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +020079 .get_src = tcp_get_src,
80 .get_dst = tcp_get_dst,
Willy Tarreau2b57cb82013-06-10 19:56:38 +020081 .drain = tcp_drain,
Willy Tarreaue6b98942007-10-29 01:09:36 +010082 .listeners = LIST_HEAD_INIT(proto_tcpv4.listeners),
83 .nb_listeners = 0,
84};
85
86/* Note: must not be declared <const> as its list will be overwritten */
87static struct protocol proto_tcpv6 = {
88 .name = "tcpv6",
89 .sock_domain = AF_INET6,
90 .sock_type = SOCK_STREAM,
91 .sock_prot = IPPROTO_TCP,
92 .sock_family = AF_INET6,
93 .sock_addrlen = sizeof(struct sockaddr_in6),
94 .l3_addrlen = 128/8,
Willy Tarreaubbebbbf2012-05-07 21:22:09 +020095 .accept = &listener_accept,
Willy Tarreau26d8c592012-05-07 18:12:14 +020096 .connect = tcp_connect_server,
Emeric Bruncf20bf12010-10-22 16:06:11 +020097 .bind = tcp_bind_listener,
Willy Tarreaue6b98942007-10-29 01:09:36 +010098 .bind_all = tcp_bind_listeners,
99 .unbind_all = unbind_all_listeners,
100 .enable_all = enable_all_listeners,
Willy Tarreau59b94792012-05-11 16:16:40 +0200101 .get_src = tcp_get_src,
102 .get_dst = tcp_get_dst,
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200103 .drain = tcp_drain,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100104 .listeners = LIST_HEAD_INIT(proto_tcpv6.listeners),
105 .nb_listeners = 0,
106};
107
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100108
David du Colombier6f5ccb12011-03-10 22:26:24 +0100109/* Binds ipv4/ipv6 address <local> to socket <fd>, unless <flags> is set, in which
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100110 * case we try to bind <remote>. <flags> is a 2-bit field consisting of :
111 * - 0 : ignore remote address (may even be a NULL pointer)
112 * - 1 : use provided address
113 * - 2 : use provided port
114 * - 3 : use both
115 *
116 * The function supports multiple foreign binding methods :
117 * - linux_tproxy: we directly bind to the foreign address
118 * - cttproxy: we bind to a local address then nat.
119 * The second one can be used as a fallback for the first one.
120 * This function returns 0 when everything's OK, 1 if it could not bind, to the
121 * local address, 2 if it could not bind to the foreign address.
122 */
David du Colombier6f5ccb12011-03-10 22:26:24 +0100123int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote)
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100124{
David du Colombier6f5ccb12011-03-10 22:26:24 +0100125 struct sockaddr_storage bind_addr;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100126 int foreign_ok = 0;
127 int ret;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100128 static int ip_transp_working = 1;
David du Colombier65c17962012-07-13 14:34:59 +0200129 static int ip6_transp_working = 1;
Pieter Baauwd551fb52013-05-08 22:49:23 +0200130
David du Colombier65c17962012-07-13 14:34:59 +0200131 switch (local->ss_family) {
132 case AF_INET:
133 if (flags && ip_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200134 /* This deserves some explanation. Some platforms will support
135 * multiple combinations of certain methods, so we try the
136 * supported ones until one succeeds.
137 */
138 if (0
139#if defined(IP_TRANSPARENT)
140 || (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0)
141#endif
142#if defined(IP_FREEBIND)
143 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
144#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200145#if defined(IP_BINDANY)
146 || (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0)
147#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200148#if defined(SO_BINDANY)
149 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
150#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200151 )
David du Colombier65c17962012-07-13 14:34:59 +0200152 foreign_ok = 1;
153 else
154 ip_transp_working = 0;
155 }
156 break;
157 case AF_INET6:
158 if (flags && ip6_transp_working) {
Pieter Baauwd551fb52013-05-08 22:49:23 +0200159 if (0
160#if defined(IPV6_TRANSPARENT)
161 || (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0)
162#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100163#if defined(IP_FREEBIND)
164 || (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0)
165#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200166#if defined(IPV6_BINDANY)
167 || (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0)
168#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200169#if defined(SO_BINDANY)
170 || (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == 0)
171#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200172 )
David du Colombier65c17962012-07-13 14:34:59 +0200173 foreign_ok = 1;
174 else
175 ip6_transp_working = 0;
176 }
177 break;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100178 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200179
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100180 if (flags) {
181 memset(&bind_addr, 0, sizeof(bind_addr));
Willy Tarreau96dd0792011-04-19 07:20:57 +0200182 bind_addr.ss_family = remote->ss_family;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100183 switch (remote->ss_family) {
184 case AF_INET:
185 if (flags & 1)
186 ((struct sockaddr_in *)&bind_addr)->sin_addr = ((struct sockaddr_in *)remote)->sin_addr;
187 if (flags & 2)
188 ((struct sockaddr_in *)&bind_addr)->sin_port = ((struct sockaddr_in *)remote)->sin_port;
189 break;
190 case AF_INET6:
191 if (flags & 1)
192 ((struct sockaddr_in6 *)&bind_addr)->sin6_addr = ((struct sockaddr_in6 *)remote)->sin6_addr;
193 if (flags & 2)
194 ((struct sockaddr_in6 *)&bind_addr)->sin6_port = ((struct sockaddr_in6 *)remote)->sin6_port;
195 break;
Willy Tarreau5dc1e982011-12-16 21:25:11 +0100196 default:
197 /* we don't want to try to bind to an unknown address family */
198 foreign_ok = 0;
David du Colombier6f5ccb12011-03-10 22:26:24 +0100199 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100200 }
201
Simon Hormande072bd2011-06-24 15:11:37 +0900202 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100203 if (foreign_ok) {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200204 if (is_addr(&bind_addr)) {
205 ret = bind(fd, (struct sockaddr *)&bind_addr, get_addr_len(&bind_addr));
206 if (ret < 0)
207 return 2;
208 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100209 }
210 else {
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200211 if (is_addr(local)) {
212 ret = bind(fd, (struct sockaddr *)local, get_addr_len(local));
213 if (ret < 0)
214 return 1;
215 }
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100216 }
217
218 if (!flags)
219 return 0;
220
221#ifdef CONFIG_HAP_CTTPROXY
Willy Tarreau6f831b42011-03-20 14:03:54 +0100222 if (!foreign_ok && remote->ss_family == AF_INET) {
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100223 struct in_tproxy itp1, itp2;
224 memset(&itp1, 0, sizeof(itp1));
225
226 itp1.op = TPROXY_ASSIGN;
Willy Tarreau6f831b42011-03-20 14:03:54 +0100227 itp1.v.addr.faddr = ((struct sockaddr_in *)&bind_addr)->sin_addr;
228 itp1.v.addr.fport = ((struct sockaddr_in *)&bind_addr)->sin_port;
Willy Tarreaue8c66af2008-01-13 18:40:14 +0100229
230 /* set connect flag on socket */
231 itp2.op = TPROXY_FLAGS;
232 itp2.v.flags = ITP_CONNECT | ITP_ONCE;
233
234 if (setsockopt(fd, SOL_IP, IP_TPROXY, &itp1, sizeof(itp1)) != -1 &&
235 setsockopt(fd, SOL_IP, IP_TPROXY, &itp2, sizeof(itp2)) != -1) {
236 foreign_ok = 1;
237 }
238 }
239#endif
240 if (!foreign_ok)
241 /* we could not bind to a foreign address */
242 return 2;
243
244 return 0;
245}
Willy Tarreaue6b98942007-10-29 01:09:36 +0100246
Willy Tarreau9650f372009-08-16 14:02:45 +0200247
248/*
Willy Tarreau14f8e862012-08-30 22:23:13 +0200249 * This function initiates a TCP connection establishment to the target assigned
250 * to connection <conn> using (si->{target,addr.to}). A source address may be
251 * pointed to by conn->addr.from in case of transparent proxying. Normal source
252 * bind addresses are still determined locally (due to the possible need of a
253 * source port). conn->target may point either to a valid server or to a backend,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100254 * depending on conn->target. Only OBJ_TYPE_PROXY and OBJ_TYPE_SERVER are
Willy Tarreauf0837b22012-11-24 10:24:27 +0100255 * supported. The <data> parameter is a boolean indicating whether there are data
256 * waiting for being sent or not, in order to adjust data write polling and on
257 * some platforms, the ability to avoid an empty initial ACK. The <delack> argument
258 * allows the caller to force using a delayed ACK when establishing the connection :
259 * - 0 = no delayed ACK unless data are advertised and backend has tcp-smart-connect
260 * - 1 = delayed ACK if backend has tcp-smart-connect, regardless of data
261 * - 2 = delayed ACK regardless of backend options
Willy Tarreaub1d67742010-03-29 19:36:59 +0200262 *
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200263 * Note that a pending send_proxy message accounts for data.
264 *
Willy Tarreau9650f372009-08-16 14:02:45 +0200265 * It can return one of :
266 * - SN_ERR_NONE if everything's OK
267 * - SN_ERR_SRVTO if there are no more servers
268 * - SN_ERR_SRVCL if the connection was refused by the server
269 * - SN_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
270 * - SN_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
271 * - SN_ERR_INTERNAL for any other purely internal errors
272 * Additionnally, in the case of SN_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreau6b0a8502012-11-23 08:51:32 +0100273 *
274 * The connection's fd is inserted only when SN_ERR_NONE is returned, otherwise
275 * it's invalid and the caller has nothing to do.
Willy Tarreau9650f372009-08-16 14:02:45 +0200276 */
Willy Tarreauf1536862011-03-03 18:27:32 +0100277
Willy Tarreauf0837b22012-11-24 10:24:27 +0100278int tcp_connect_server(struct connection *conn, int data, int delack)
Willy Tarreau9650f372009-08-16 14:02:45 +0200279{
280 int fd;
Willy Tarreauac825402011-03-04 22:04:29 +0100281 struct server *srv;
282 struct proxy *be;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100283 struct conn_src *src;
Willy Tarreauac825402011-03-04 22:04:29 +0100284
Willy Tarreau9ce70132014-01-24 16:08:19 +0100285 conn->flags = CO_FL_WAIT_L4_CONN; /* connection in progress */
286
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100287 switch (obj_type(conn->target)) {
288 case OBJ_TYPE_PROXY:
289 be = objt_proxy(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100290 srv = NULL;
291 break;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100292 case OBJ_TYPE_SERVER:
293 srv = objt_server(conn->target);
Willy Tarreauac825402011-03-04 22:04:29 +0100294 be = srv->proxy;
295 break;
296 default:
Willy Tarreau9ce70132014-01-24 16:08:19 +0100297 conn->flags |= CO_FL_ERROR;
Willy Tarreauac825402011-03-04 22:04:29 +0100298 return SN_ERR_INTERNAL;
299 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200300
Willy Tarreau986a9d22012-08-30 21:11:38 +0200301 if ((fd = conn->t.sock.fd = socket(conn->addr.to.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200302 qfprintf(stderr, "Cannot get a server socket.\n");
303
Willy Tarreau9ce70132014-01-24 16:08:19 +0100304 if (errno == ENFILE) {
305 conn->err_code = CO_ER_SYS_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200306 send_log(be, LOG_EMERG,
307 "Proxy %s reached system FD limit at %d. Please check system tunables.\n",
308 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100309 }
310 else if (errno == EMFILE) {
311 conn->err_code = CO_ER_PROC_FDLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200312 send_log(be, LOG_EMERG,
313 "Proxy %s reached process FD limit at %d. Please check 'ulimit-n' and restart.\n",
314 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100315 }
316 else if (errno == ENOBUFS || errno == ENOMEM) {
317 conn->err_code = CO_ER_SYS_MEMLIM;
Willy Tarreau9650f372009-08-16 14:02:45 +0200318 send_log(be, LOG_EMERG,
319 "Proxy %s reached system memory limit at %d sockets. Please check system tunables.\n",
320 be->id, maxfd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100321 }
322 else if (errno == EAFNOSUPPORT || errno == EPROTONOSUPPORT) {
323 conn->err_code = CO_ER_NOPROTO;
324 }
325 else
326 conn->err_code = CO_ER_SOCK_ERR;
327
Willy Tarreau9650f372009-08-16 14:02:45 +0200328 /* this is a resource error */
Willy Tarreau9ce70132014-01-24 16:08:19 +0100329 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200330 return SN_ERR_RESOURCE;
331 }
332
333 if (fd >= global.maxsock) {
334 /* do not log anything there, it's a normal condition when this option
335 * is used to serialize connections to a server !
336 */
337 Alert("socket(): not enough free sockets. Raise -n argument. Giving up.\n");
338 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100339 conn->err_code = CO_ER_CONF_FDLIM;
340 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200341 return SN_ERR_PRXCOND; /* it is a configuration limit */
342 }
343
344 if ((fcntl(fd, F_SETFL, O_NONBLOCK)==-1) ||
Simon Hormande072bd2011-06-24 15:11:37 +0900345 (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) == -1)) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200346 qfprintf(stderr,"Cannot set client socket to non blocking mode.\n");
347 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100348 conn->err_code = CO_ER_SOCK_ERR;
349 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200350 return SN_ERR_INTERNAL;
351 }
352
353 if (be->options & PR_O_TCP_SRV_KA)
Simon Hormande072bd2011-06-24 15:11:37 +0900354 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one));
Willy Tarreau9650f372009-08-16 14:02:45 +0200355
Willy Tarreau9650f372009-08-16 14:02:45 +0200356 /* allow specific binding :
357 * - server-specific at first
358 * - proxy-specific next
359 */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100360 if (srv && srv->conn_src.opts & CO_SRC_BIND)
361 src = &srv->conn_src;
362 else if (be->conn_src.opts & CO_SRC_BIND)
363 src = &be->conn_src;
364 else
365 src = NULL;
366
367 if (src) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200368 int ret, flags = 0;
369
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200370 if (is_addr(&conn->addr.from)) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100371 switch (src->opts & CO_SRC_TPROXY_MASK) {
Willy Tarreauef9a3602012-12-08 22:29:20 +0100372 case CO_SRC_TPROXY_ADDR:
373 case CO_SRC_TPROXY_CLI:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200374 flags = 3;
375 break;
Willy Tarreauef9a3602012-12-08 22:29:20 +0100376 case CO_SRC_TPROXY_CIP:
377 case CO_SRC_TPROXY_DYN:
Willy Tarreau5f2877a2012-10-26 19:57:58 +0200378 flags = 1;
379 break;
380 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200381 }
Willy Tarreaub1d67742010-03-29 19:36:59 +0200382
Willy Tarreau9650f372009-08-16 14:02:45 +0200383#ifdef SO_BINDTODEVICE
384 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100385 if (src->iface_name)
386 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, src->iface_name, src->iface_len + 1);
Willy Tarreau9650f372009-08-16 14:02:45 +0200387#endif
388
Willy Tarreaua4380b42012-12-08 22:49:11 +0100389 if (src->sport_range) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200390 int attempts = 10; /* should be more than enough to find a spare port */
Willy Tarreaua4380b42012-12-08 22:49:11 +0100391 struct sockaddr_storage sa;
Willy Tarreau9650f372009-08-16 14:02:45 +0200392
393 ret = 1;
Willy Tarreaua4380b42012-12-08 22:49:11 +0100394 sa = src->source_addr;
Willy Tarreau9650f372009-08-16 14:02:45 +0200395
396 do {
397 /* note: in case of retry, we may have to release a previously
398 * allocated port, hence this loop's construct.
399 */
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200400 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
401 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200402
403 if (!attempts)
404 break;
405 attempts--;
406
Willy Tarreaua4380b42012-12-08 22:49:11 +0100407 fdinfo[fd].local_port = port_range_alloc_port(src->sport_range);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100408 if (!fdinfo[fd].local_port) {
409 conn->err_code = CO_ER_PORT_RANGE;
Willy Tarreau9650f372009-08-16 14:02:45 +0200410 break;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100411 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200412
Willy Tarreaua4380b42012-12-08 22:49:11 +0100413 fdinfo[fd].port_range = src->sport_range;
414 set_host_port(&sa, fdinfo[fd].local_port);
Willy Tarreau9650f372009-08-16 14:02:45 +0200415
Willy Tarreaua4380b42012-12-08 22:49:11 +0100416 ret = tcp_bind_socket(fd, flags, &sa, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100417 if (ret != 0)
418 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200419 } while (ret != 0); /* binding NOK */
420 }
421 else {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100422 ret = tcp_bind_socket(fd, flags, &src->source_addr, &conn->addr.from);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100423 if (ret != 0)
424 conn->err_code = CO_ER_CANT_BIND;
Willy Tarreau9650f372009-08-16 14:02:45 +0200425 }
426
Willy Tarreaua4380b42012-12-08 22:49:11 +0100427 if (unlikely(ret != 0)) {
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200428 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
429 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200430 close(fd);
431
Willy Tarreau9650f372009-08-16 14:02:45 +0200432 if (ret == 1) {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100433 Alert("Cannot bind to source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200434 be->id);
435 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100436 "Cannot bind to source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200437 be->id);
438 } else {
Willy Tarreaua4380b42012-12-08 22:49:11 +0100439 Alert("Cannot bind to tproxy source address before connect() for backend %s. Aborting.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200440 be->id);
441 send_log(be, LOG_EMERG,
Willy Tarreaua4380b42012-12-08 22:49:11 +0100442 "Cannot bind to tproxy source address before connect() for backend %s.\n",
Willy Tarreau9650f372009-08-16 14:02:45 +0200443 be->id);
444 }
Willy Tarreau9ce70132014-01-24 16:08:19 +0100445 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200446 return SN_ERR_RESOURCE;
447 }
448 }
449
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200450 /* if a send_proxy is there, there are data */
451 data |= conn->send_proxy_ofs;
452
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400453#if defined(TCP_QUICKACK)
Willy Tarreau9650f372009-08-16 14:02:45 +0200454 /* disabling tcp quick ack now allows the first request to leave the
455 * machine with the first ACK. We only do this if there are pending
Willy Tarreauf0837b22012-11-24 10:24:27 +0100456 * data in the buffer.
Willy Tarreau9650f372009-08-16 14:02:45 +0200457 */
Willy Tarreauf0837b22012-11-24 10:24:27 +0100458 if (delack == 2 || ((delack || data) && (be->options2 & PR_O2_SMARTCON)))
Simon Hormande072bd2011-06-24 15:11:37 +0900459 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9650f372009-08-16 14:02:45 +0200460#endif
461
Willy Tarreaue803de22010-01-21 17:43:04 +0100462 if (global.tune.server_sndbuf)
463 setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &global.tune.server_sndbuf, sizeof(global.tune.server_sndbuf));
464
465 if (global.tune.server_rcvbuf)
466 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &global.tune.server_rcvbuf, sizeof(global.tune.server_rcvbuf));
467
Willy Tarreau986a9d22012-08-30 21:11:38 +0200468 if ((connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) == -1) &&
Willy Tarreau9650f372009-08-16 14:02:45 +0200469 (errno != EINPROGRESS) && (errno != EALREADY) && (errno != EISCONN)) {
470
Willy Tarreaub1719512012-12-08 23:03:28 +0100471 if (errno == EAGAIN || errno == EADDRINUSE || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200472 char *msg;
Willy Tarreau9ce70132014-01-24 16:08:19 +0100473 if (errno == EAGAIN || errno == EADDRNOTAVAIL) {
Willy Tarreau9650f372009-08-16 14:02:45 +0200474 msg = "no free ports";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100475 conn->err_code = CO_ER_FREE_PORTS;
476 }
477 else {
Willy Tarreau9650f372009-08-16 14:02:45 +0200478 msg = "local address already in use";
Willy Tarreau9ce70132014-01-24 16:08:19 +0100479 conn->err_code = CO_ER_ADDR_INUSE;
480 }
Willy Tarreau9650f372009-08-16 14:02:45 +0200481
Willy Tarreaub1719512012-12-08 23:03:28 +0100482 qfprintf(stderr,"Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200483 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
484 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200485 close(fd);
Willy Tarreaub1719512012-12-08 23:03:28 +0100486 send_log(be, LOG_ERR, "Connect() failed for backend %s: %s.\n", be->id, msg);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100487 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200488 return SN_ERR_RESOURCE;
489 } else if (errno == ETIMEDOUT) {
490 //qfprintf(stderr,"Connect(): ETIMEDOUT");
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200491 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
492 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200493 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100494 conn->err_code = CO_ER_SOCK_ERR;
495 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200496 return SN_ERR_SRVTO;
497 } else {
498 // (errno == ECONNREFUSED || errno == ENETUNREACH || errno == EACCES || errno == EPERM)
499 //qfprintf(stderr,"Connect(): %d", errno);
Willy Tarreau8d5d77e2009-10-18 07:25:52 +0200500 port_range_release_port(fdinfo[fd].port_range, fdinfo[fd].local_port);
501 fdinfo[fd].port_range = NULL;
Willy Tarreau9650f372009-08-16 14:02:45 +0200502 close(fd);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100503 conn->err_code = CO_ER_SOCK_ERR;
504 conn->flags |= CO_FL_ERROR;
Willy Tarreau9650f372009-08-16 14:02:45 +0200505 return SN_ERR_SRVCL;
506 }
507 }
508
Willy Tarreaufc8f1f02012-12-08 18:53:44 +0100509 conn->flags |= CO_FL_ADDR_TO_SET;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200510
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200511 /* Prepare to send a few handshakes related to the on-wire protocol. */
512 if (conn->send_proxy_ofs)
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200513 conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreau1ec74bf2013-10-24 21:45:00 +0200514
Willy Tarreauf79c8172013-10-21 16:30:56 +0200515 conn_ctrl_init(conn); /* registers the FD */
Willy Tarreauad38ace2013-12-15 14:19:38 +0100516 fdtab[fd].linger_risk = 1; /* close hard if needed */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200517 conn_sock_want_send(conn); /* for connect status */
Willy Tarreau15678ef2012-08-31 13:54:11 +0200518
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200519 if (conn_xprt_init(conn) < 0) {
Willy Tarreauf79c8172013-10-21 16:30:56 +0200520 conn_force_close(conn);
Willy Tarreau9ce70132014-01-24 16:08:19 +0100521 conn->flags |= CO_FL_ERROR;
Willy Tarreau15678ef2012-08-31 13:54:11 +0200522 return SN_ERR_RESOURCE;
Willy Tarreau184636e2012-09-06 14:04:41 +0200523 }
Willy Tarreau15678ef2012-08-31 13:54:11 +0200524
Willy Tarreau14f8e862012-08-30 22:23:13 +0200525 if (data)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200526 conn_data_want_send(conn); /* prepare to send data if any */
Willy Tarreau9650f372009-08-16 14:02:45 +0200527
Willy Tarreau9650f372009-08-16 14:02:45 +0200528 return SN_ERR_NONE; /* connection is OK */
529}
530
531
Willy Tarreau59b94792012-05-11 16:16:40 +0200532/*
533 * Retrieves the source address for the socket <fd>, with <dir> indicating
534 * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
535 * success, -1 in case of error. The socket's source address is stored in
536 * <sa> for <salen> bytes.
537 */
538int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
539{
540 if (dir)
541 return getsockname(fd, sa, &salen);
542 else
543 return getpeername(fd, sa, &salen);
544}
545
546
547/*
548 * Retrieves the original destination address for the socket <fd>, with <dir>
549 * indicating if we're a listener (=0) or an initiator (!=0). In the case of a
550 * listener, if the original destination address was translated, the original
551 * address is retrieved. It returns 0 in case of success, -1 in case of error.
552 * The socket's source address is stored in <sa> for <salen> bytes.
553 */
554int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
555{
556 if (dir)
557 return getpeername(fd, sa, &salen);
558#if defined(TPROXY) && defined(SO_ORIGINAL_DST)
559 else if (getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
560 return 0;
561#endif
562 else
563 return getsockname(fd, sa, &salen);
564}
565
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200566/* Tries to drain any pending incoming data from the socket to reach the
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100567 * receive shutdown. Returns positive if the shutdown was found, negative
568 * if EAGAIN was hit, otherwise zero. This is useful to decide whether we
569 * can close a connection cleanly are we must kill it hard.
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200570 */
571int tcp_drain(int fd)
572{
573 int turns = 2;
574 int len;
575
576 while (turns) {
577#ifdef MSG_TRUNC_CLEARS_INPUT
578 len = recv(fd, NULL, INT_MAX, MSG_DONTWAIT | MSG_NOSIGNAL | MSG_TRUNC);
579 if (len == -1 && errno == EFAULT)
580#endif
581 len = recv(fd, trash.str, trash.size, MSG_DONTWAIT | MSG_NOSIGNAL);
582
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100583 if (len == 0) {
584 /* cool, shutdown received */
585 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200586 return 1;
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100587 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200588
589 if (len < 0) {
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100590 if (errno == EAGAIN) {
591 /* connection not closed yet */
592 fd_cant_recv(fd);
Willy Tarreau7f4bcc32014-01-20 11:26:12 +0100593 return -1;
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100594 }
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200595 if (errno == EINTR) /* oops, try again */
596 continue;
597 /* other errors indicate a dead connection, fine. */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100598 fdtab[fd].linger_risk = 0;
Willy Tarreau2b57cb82013-06-10 19:56:38 +0200599 return 1;
600 }
601 /* OK we read some data, let's try again once */
602 turns--;
603 }
604 /* some data are still present, give up */
605 return 0;
606}
607
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200608/* This is the callback which is set when a connection establishment is pending
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100609 * and we have nothing to send. It updates the FD polling status. It returns 0
610 * if it fails in a fatal way or needs to poll to go further, otherwise it
611 * returns non-zero and removes the CO_FL_WAIT_L4_CONN flag from the connection's
612 * flags. In case of error, it sets CO_FL_ERROR and leaves the error code in
613 * errno. The error checking is done in two passes in order to limit the number
614 * of syscalls in the normal case :
615 * - if POLL_ERR was reported by the poller, we check for a pending error on
616 * the socket before proceeding. If found, it's assigned to errno so that
617 * upper layers can see it.
618 * - otherwise connect() is used to check the connection state again, since
619 * the getsockopt return cannot reliably be used to know if the connection
620 * is still pending or ready. This one may often return an error as well,
621 * since we don't always have POLL_ERR (eg: OSX or cached events).
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200622 */
Willy Tarreau239d7182012-07-23 18:53:03 +0200623int tcp_connect_probe(struct connection *conn)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200624{
Willy Tarreau239d7182012-07-23 18:53:03 +0200625 int fd = conn->t.sock.fd;
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100626 socklen_t lskerr;
627 int skerr;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200628
Willy Tarreau80184712012-07-06 14:54:49 +0200629 if (conn->flags & CO_FL_ERROR)
Willy Tarreauafad0e02012-08-09 14:45:22 +0200630 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200631
Willy Tarreau3c728722014-01-23 13:50:42 +0100632 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200633 return 0;
634
Willy Tarreau80184712012-07-06 14:54:49 +0200635 if (!(conn->flags & CO_FL_WAIT_L4_CONN))
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200636 return 1; /* strange we were called while ready */
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200637
Willy Tarreaufd803bb2014-01-20 15:13:07 +0100638 if (!fd_send_ready(fd))
639 return 0;
640
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100641 /* we might be the first witness of FD_POLL_ERR. Note that FD_POLL_HUP
642 * without FD_POLL_IN also indicates a hangup without input data meaning
643 * there was no connection.
644 */
645 if (fdtab[fd].ev & FD_POLL_ERR ||
646 (fdtab[fd].ev & (FD_POLL_IN|FD_POLL_HUP)) == FD_POLL_HUP) {
647 skerr = 0;
648 lskerr = sizeof(skerr);
649 getsockopt(fd, SOL_SOCKET, SO_ERROR, &skerr, &lskerr);
650 errno = skerr;
651 if (errno == EAGAIN)
652 errno = 0;
653 if (errno)
654 goto out_error;
655 }
Willy Tarreau2da156f2012-07-23 15:07:23 +0200656
Willy Tarreauf12a20e2013-12-04 16:11:04 +0100657 /* Use connect() to check the state of the socket. This has the
658 * advantage of giving us the following info :
Willy Tarreau2c6be842012-07-06 17:12:34 +0200659 * - error
660 * - connecting (EALREADY, EINPROGRESS)
661 * - connected (EISCONN, 0)
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200662 */
Willy Tarreau986a9d22012-08-30 21:11:38 +0200663 if (connect(fd, (struct sockaddr *)&conn->addr.to, get_addr_len(&conn->addr.to)) < 0) {
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200664 if (errno == EALREADY || errno == EINPROGRESS) {
Willy Tarreaud486ef52012-12-10 17:03:52 +0100665 __conn_sock_stop_recv(conn);
Willy Tarreaue1f50c42014-01-22 20:02:06 +0100666 fd_cant_send(fd);
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200667 return 0;
Willy Tarreauf9dabec2012-08-17 17:33:53 +0200668 }
Willy Tarreaua190d592012-05-20 18:35:19 +0200669
Willy Tarreau2c6be842012-07-06 17:12:34 +0200670 if (errno && errno != EISCONN)
Willy Tarreaua190d592012-05-20 18:35:19 +0200671 goto out_error;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200672
Willy Tarreau2c6be842012-07-06 17:12:34 +0200673 /* otherwise we're connected */
Willy Tarreaua190d592012-05-20 18:35:19 +0200674 }
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200675
Willy Tarreau076be252012-07-06 16:02:29 +0200676 /* The FD is ready now, we'll mark the connection as complete and
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200677 * forward the event to the transport layer which will notify the
678 * data layer.
Willy Tarreaua190d592012-05-20 18:35:19 +0200679 */
Willy Tarreau80184712012-07-06 14:54:49 +0200680 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200681 return 1;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200682
683 out_error:
Willy Tarreau0b0c0972012-07-23 20:05:00 +0200684 /* Write error on the file descriptor. Report it to the connection
685 * and disable polling on this FD.
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200686 */
Willy Tarreau3bd3e572014-01-20 11:56:37 +0100687 fdtab[fd].linger_risk = 0;
Willy Tarreau26f4a042013-12-04 23:44:10 +0100688 conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH;
Willy Tarreaud486ef52012-12-10 17:03:52 +0100689 __conn_sock_stop_both(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200690 return 0;
Willy Tarreaueeda90e2012-05-11 19:53:32 +0200691}
692
Willy Tarreau59b94792012-05-11 16:16:40 +0200693
Willy Tarreaue6b98942007-10-29 01:09:36 +0100694/* This function tries to bind a TCPv4/v6 listener. It may return a warning or
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100695 * an error message in <errmsg> if the message is at most <errlen> bytes long
696 * (including '\0'). Note that <errmsg> may be NULL if <errlen> is also zero.
697 * The return value is composed from ERR_ABORT, ERR_WARN,
Willy Tarreaue6b98942007-10-29 01:09:36 +0100698 * ERR_ALERT, ERR_RETRYABLE and ERR_FATAL. ERR_NONE indicates that everything
699 * was alright and that no message was returned. ERR_RETRYABLE means that an
700 * error occurred but that it may vanish after a retry (eg: port in use), and
Aman Guptad94991d2012-04-06 17:39:26 -0700701 * ERR_FATAL indicates a non-fixable error. ERR_WARN and ERR_ALERT do not alter
Willy Tarreaue6b98942007-10-29 01:09:36 +0100702 * the meaning of the error, but just indicate that a message is present which
703 * should be displayed with the respective level. Last, ERR_ABORT indicates
704 * that it's pointless to try to start other listeners. No error message is
705 * returned if errlen is NULL.
706 */
707int tcp_bind_listener(struct listener *listener, char *errmsg, int errlen)
708{
709 __label__ tcp_return, tcp_close_return;
710 int fd, err;
Willy Tarreau40aa0702013-03-10 23:51:38 +0100711 int ext, ready;
712 socklen_t ready_len;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100713 const char *msg = NULL;
714
715 /* ensure we never return garbage */
Willy Tarreau8ab505b2013-01-24 01:41:38 +0100716 if (errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100717 *errmsg = 0;
718
719 if (listener->state != LI_ASSIGNED)
720 return ERR_NONE; /* already bound */
721
722 err = ERR_NONE;
723
Willy Tarreau40aa0702013-03-10 23:51:38 +0100724 /* if the listener already has an fd assigned, then we were offered the
725 * fd by an external process (most likely the parent), and we don't want
726 * to create a new socket. However we still want to set a few flags on
727 * the socket.
728 */
729 fd = listener->fd;
730 ext = (fd >= 0);
731
732 if (!ext && (fd = socket(listener->addr.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100733 err |= ERR_RETRYABLE | ERR_ALERT;
734 msg = "cannot create listening socket";
735 goto tcp_return;
736 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100737
Willy Tarreaue6b98942007-10-29 01:09:36 +0100738 if (fd >= global.maxsock) {
739 err |= ERR_FATAL | ERR_ABORT | ERR_ALERT;
740 msg = "not enough free sockets (raise '-n' parameter)";
741 goto tcp_close_return;
742 }
743
Willy Tarreaufb14edc2009-06-14 15:24:37 +0200744 if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100745 err |= ERR_FATAL | ERR_ALERT;
746 msg = "cannot make socket non-blocking";
747 goto tcp_close_return;
748 }
749
Willy Tarreau40aa0702013-03-10 23:51:38 +0100750 if (!ext && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100751 /* not fatal but should be reported */
752 msg = "cannot do so_reuseaddr";
753 err |= ERR_ALERT;
754 }
755
756 if (listener->options & LI_O_NOLINGER)
Simon Hormande072bd2011-06-24 15:11:37 +0900757 setsockopt(fd, SOL_SOCKET, SO_LINGER, &nolinger, sizeof(struct linger));
Willy Tarreauedcf6682008-11-30 23:15:34 +0100758
Willy Tarreaue6b98942007-10-29 01:09:36 +0100759#ifdef SO_REUSEPORT
760 /* OpenBSD supports this. As it's present in old libc versions of Linux,
761 * it might return an error that we will silently ignore.
762 */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100763 if (!ext)
764 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
Willy Tarreaue6b98942007-10-29 01:09:36 +0100765#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200766
Willy Tarreau40aa0702013-03-10 23:51:38 +0100767 if (!ext && (listener->options & LI_O_FOREIGN)) {
David du Colombier65c17962012-07-13 14:34:59 +0200768 switch (listener->addr.ss_family) {
769 case AF_INET:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200770 if (1
771#if defined(IP_TRANSPARENT)
772 && (setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == -1)
773#endif
774#if defined(IP_FREEBIND)
775 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
776#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200777#if defined(IP_BINDANY)
778 && (setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == -1)
779#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200780#if defined(SO_BINDANY)
781 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
782#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200783 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200784 msg = "cannot make listening socket transparent";
785 err |= ERR_ALERT;
786 }
787 break;
788 case AF_INET6:
Pieter Baauwd551fb52013-05-08 22:49:23 +0200789 if (1
790#if defined(IPV6_TRANSPARENT)
791 && (setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == -1)
792#endif
Lukas Tribus7640e722014-03-03 21:10:51 +0100793#if defined(IP_FREEBIND)
794 && (setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == -1)
795#endif
Pieter Baauwff30b662013-05-08 23:22:39 +0200796#if defined(IPV6_BINDANY)
797 && (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == -1)
798#endif
Pieter Baauw1eb75922013-05-08 23:30:23 +0200799#if defined(SO_BINDANY)
800 && (setsockopt(fd, SOL_SOCKET, SO_BINDANY, &one, sizeof(one)) == -1)
801#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +0200802 ) {
David du Colombier65c17962012-07-13 14:34:59 +0200803 msg = "cannot make listening socket transparent";
804 err |= ERR_ALERT;
805 }
806 break;
807 }
Willy Tarreaub1e52e82008-01-13 14:49:51 +0100808 }
Pieter Baauwd551fb52013-05-08 22:49:23 +0200809
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100810#ifdef SO_BINDTODEVICE
811 /* Note: this might fail if not CAP_NET_RAW */
Willy Tarreau40aa0702013-03-10 23:51:38 +0100812 if (!ext && listener->interface) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100813 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
Willy Tarreau604e8302009-03-06 00:48:23 +0100814 listener->interface, strlen(listener->interface) + 1) == -1) {
Willy Tarreau5e6e2042009-02-04 17:19:29 +0100815 msg = "cannot bind listener to device";
816 err |= ERR_WARN;
817 }
818 }
819#endif
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400820#if defined(TCP_MAXSEG)
Willy Tarreau48a7e722010-12-24 15:26:39 +0100821 if (listener->maxseg > 0) {
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400822 if (setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG,
Willy Tarreaube1b9182009-06-14 18:48:19 +0200823 &listener->maxseg, sizeof(listener->maxseg)) == -1) {
824 msg = "cannot set MSS";
825 err |= ERR_WARN;
826 }
827 }
828#endif
Willy Tarreaucb6cd432009-10-13 07:34:14 +0200829#if defined(TCP_DEFER_ACCEPT)
830 if (listener->options & LI_O_DEF_ACCEPT) {
831 /* defer accept by up to one second */
832 int accept_delay = 1;
833 if (setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &accept_delay, sizeof(accept_delay)) == -1) {
834 msg = "cannot enable DEFER_ACCEPT";
835 err |= ERR_WARN;
836 }
837 }
838#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +0200839#if defined(TCP_FASTOPEN)
840 if (listener->options & LI_O_TCP_FO) {
841 /* TFO needs a queue length, let's use the configured backlog */
842 int qlen = listener->backlog ? listener->backlog : listener->maxconn;
843 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) {
844 msg = "cannot enable TCP_FASTOPEN";
845 err |= ERR_WARN;
846 }
847 }
848#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100849#if defined(IPV6_V6ONLY)
850 if (listener->options & LI_O_V6ONLY)
851 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
Willy Tarreau77e3af92012-11-24 15:07:23 +0100852 else if (listener->options & LI_O_V4V6)
853 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
Willy Tarreau9b6700f2012-11-24 11:55:28 +0100854#endif
855
Willy Tarreau40aa0702013-03-10 23:51:38 +0100856 if (!ext && bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100857 err |= ERR_RETRYABLE | ERR_ALERT;
858 msg = "cannot bind socket";
859 goto tcp_close_return;
860 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100861
Willy Tarreau40aa0702013-03-10 23:51:38 +0100862 ready = 0;
863 ready_len = sizeof(ready);
864 if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &ready, &ready_len) == -1)
865 ready = 0;
866
867 if (!(ext && ready) && /* only listen if not already done by external process */
868 listen(fd, listener->backlog ? listener->backlog : listener->maxconn) == -1) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100869 err |= ERR_RETRYABLE | ERR_ALERT;
870 msg = "cannot listen to socket";
871 goto tcp_close_return;
872 }
Willy Tarreauedcf6682008-11-30 23:15:34 +0100873
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +0400874#if defined(TCP_QUICKACK)
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200875 if (listener->options & LI_O_NOQUICKACK)
Simon Hormande072bd2011-06-24 15:11:37 +0900876 setsockopt(fd, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
Willy Tarreau9ea05a72009-06-14 12:07:01 +0200877#endif
878
Willy Tarreaue6b98942007-10-29 01:09:36 +0100879 /* the socket is ready */
880 listener->fd = fd;
881 listener->state = LI_LISTEN;
882
Willy Tarreaueabf3132008-08-29 23:36:51 +0200883 fdtab[fd].owner = listener; /* reference the listener instead of a task */
Willy Tarreauaece46a2012-07-06 12:25:58 +0200884 fdtab[fd].iocb = listener->proto->accept;
Willy Tarreaueb472682010-05-28 18:46:57 +0200885 fd_insert(fd);
886
Willy Tarreaue6b98942007-10-29 01:09:36 +0100887 tcp_return:
Cyril Bonté43ba1b32010-11-01 19:26:01 +0100888 if (msg && errlen) {
889 char pn[INET6_ADDRSTRLEN];
890
Willy Tarreau631f01c2011-09-05 00:36:48 +0200891 addr_to_str(&listener->addr, pn, sizeof(pn));
892 snprintf(errmsg, errlen, "%s [%s:%d]", msg, pn, get_host_port(&listener->addr));
Cyril Bonté43ba1b32010-11-01 19:26:01 +0100893 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100894 return err;
895
896 tcp_close_return:
897 close(fd);
898 goto tcp_return;
899}
900
901/* This function creates all TCP sockets bound to the protocol entry <proto>.
902 * It is intended to be used as the protocol's bind_all() function.
903 * The sockets will be registered but not added to any fd_set, in order not to
904 * loose them across the fork(). A call to enable_all_listeners() is needed
905 * to complete initialization. The return value is composed from ERR_*.
906 */
Emeric Bruncf20bf12010-10-22 16:06:11 +0200907static int tcp_bind_listeners(struct protocol *proto, char *errmsg, int errlen)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100908{
909 struct listener *listener;
910 int err = ERR_NONE;
911
912 list_for_each_entry(listener, &proto->listeners, proto_list) {
Emeric Bruncf20bf12010-10-22 16:06:11 +0200913 err |= tcp_bind_listener(listener, errmsg, errlen);
914 if (err & ERR_ABORT)
Willy Tarreaue6b98942007-10-29 01:09:36 +0100915 break;
916 }
917
918 return err;
919}
920
921/* Add listener to the list of tcpv4 listeners. The listener's state
922 * is automatically updated from LI_INIT to LI_ASSIGNED. The number of
923 * listeners is updated. This is the function to use to add a new listener.
924 */
925void tcpv4_add_listener(struct listener *listener)
926{
927 if (listener->state != LI_INIT)
928 return;
929 listener->state = LI_ASSIGNED;
930 listener->proto = &proto_tcpv4;
931 LIST_ADDQ(&proto_tcpv4.listeners, &listener->proto_list);
932 proto_tcpv4.nb_listeners++;
933}
934
935/* Add listener to the list of tcpv4 listeners. The listener's state
936 * is automatically updated from LI_INIT to LI_ASSIGNED. The number of
937 * listeners is updated. This is the function to use to add a new listener.
938 */
939void tcpv6_add_listener(struct listener *listener)
940{
941 if (listener->state != LI_INIT)
942 return;
943 listener->state = LI_ASSIGNED;
944 listener->proto = &proto_tcpv6;
945 LIST_ADDQ(&proto_tcpv6.listeners, &listener->proto_list);
946 proto_tcpv6.nb_listeners++;
947}
948
Willy Tarreauedcf6682008-11-30 23:15:34 +0100949/* This function performs the TCP request analysis on the current request. It
950 * returns 1 if the processing can continue on next analysers, or zero if it
951 * needs more data, encounters an error, or wants to immediately abort the
Willy Tarreaufb356202010-08-03 14:02:05 +0200952 * request. It relies on buffers flags, and updates s->req->analysers. The
953 * function may be called for frontend rules and backend rules. It only relies
954 * on the backend pointer so this works for both cases.
Willy Tarreauedcf6682008-11-30 23:15:34 +0100955 */
Willy Tarreau7421efb2012-07-02 15:11:27 +0200956int tcp_inspect_request(struct session *s, struct channel *req, int an_bit)
Willy Tarreauedcf6682008-11-30 23:15:34 +0100957{
958 struct tcp_rule *rule;
Willy Tarreaud1f96522010-08-03 19:34:32 +0200959 struct stksess *ts;
960 struct stktable *t;
Willy Tarreauedcf6682008-11-30 23:15:34 +0100961 int partial;
962
Willy Tarreau02d6cfc2012-03-01 18:19:58 +0100963 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Willy Tarreauedcf6682008-11-30 23:15:34 +0100964 now_ms, __FUNCTION__,
965 s,
966 req,
967 req->rex, req->wex,
968 req->flags,
Willy Tarreau9b28e032012-10-12 23:49:43 +0200969 req->buf->i,
Willy Tarreauedcf6682008-11-30 23:15:34 +0100970 req->analysers);
971
Willy Tarreauedcf6682008-11-30 23:15:34 +0100972 /* We don't know whether we have enough data, so must proceed
973 * this way :
974 * - iterate through all rules in their declaration order
975 * - if one rule returns MISS, it means the inspect delay is
976 * not over yet, then return immediately, otherwise consider
977 * it as a non-match.
978 * - if one rule returns OK, then return OK
979 * - if one rule returns KO, then return KO
980 */
981
Willy Tarreau9b28e032012-10-12 23:49:43 +0200982 if ((req->flags & CF_SHUTR) || buffer_full(req->buf, global.tune.maxrewrite) ||
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200983 !s->be->tcp_req.inspect_delay || tick_is_expired(req->analyse_exp, now_ms))
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200984 partial = SMP_OPT_FINAL;
Willy Tarreauedcf6682008-11-30 23:15:34 +0100985 else
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200986 partial = 0;
Willy Tarreauedcf6682008-11-30 23:15:34 +0100987
Willy Tarreaufb356202010-08-03 14:02:05 +0200988 list_for_each_entry(rule, &s->be->tcp_req.inspect_rules, list) {
Willy Tarreau0cba6072013-11-28 22:21:02 +0100989 enum acl_test_res ret = ACL_TEST_PASS;
Willy Tarreauedcf6682008-11-30 23:15:34 +0100990
991 if (rule->cond) {
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200992 ret = acl_exec_cond(rule->cond, s->be, s, &s->txn, SMP_OPT_DIR_REQ | partial);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100993 if (ret == ACL_TEST_MISS) {
Willy Tarreau8263d2b2012-08-28 00:06:31 +0200994 channel_dont_connect(req);
Willy Tarreauedcf6682008-11-30 23:15:34 +0100995 /* just set the request timeout once at the beginning of the request */
Willy Tarreaufb356202010-08-03 14:02:05 +0200996 if (!tick_isset(req->analyse_exp) && s->be->tcp_req.inspect_delay)
Willy Tarreau0bb166b2013-11-04 15:56:53 +0100997 req->analyse_exp = tick_add(now_ms, s->be->tcp_req.inspect_delay);
Willy Tarreauedcf6682008-11-30 23:15:34 +0100998 return 0;
999 }
1000
1001 ret = acl_pass(ret);
1002 if (rule->cond->pol == ACL_COND_UNLESS)
1003 ret = !ret;
1004 }
1005
1006 if (ret) {
1007 /* we have a matching rule. */
1008 if (rule->action == TCP_ACT_REJECT) {
Willy Tarreau8263d2b2012-08-28 00:06:31 +02001009 channel_abort(req);
1010 channel_abort(s->rep);
Willy Tarreauedcf6682008-11-30 23:15:34 +01001011 req->analysers = 0;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001012
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001013 s->be->be_counters.denied_req++;
1014 s->fe->fe_counters.denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001015 if (s->listener->counters)
Willy Tarreau23968d82010-05-23 23:50:44 +02001016 s->listener->counters->denied_req++;
Krzysztof Piotr Oledzkiaeebf9b2009-10-04 15:43:17 +02001017
Willy Tarreauedcf6682008-11-30 23:15:34 +01001018 if (!(s->flags & SN_ERR_MASK))
1019 s->flags |= SN_ERR_PRXCOND;
1020 if (!(s->flags & SN_FINST_MASK))
1021 s->flags |= SN_FINST_R;
1022 return 0;
1023 }
Willy Tarreau44778ad2013-10-30 19:24:00 +01001024 else if (rule->action >= TCP_ACT_TRK_SC0 && rule->action <= TCP_ACT_TRK_SCMAX) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001025 /* Note: only the first valid tracking parameter of each
1026 * applies.
1027 */
1028 struct stktable_key *key;
1029
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001030 if (stkctr_entry(&s->stkctr[tcp_trk_idx(rule->action)]))
Willy Tarreau44778ad2013-10-30 19:24:00 +01001031 continue;
1032
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001033 t = rule->act_prm.trk_ctr.table.t;
1034 key = stktable_fetch_key(t, s->be, s, &s->txn, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->act_prm.trk_ctr.expr);
1035
1036 if (key && (ts = stktable_get_entry(t, key))) {
Willy Tarreaud5ca9ab2013-05-28 17:40:25 +02001037 session_track_stkctr(&s->stkctr[tcp_trk_idx(rule->action)], t, ts);
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001038 stkctr_set_flags(&s->stkctr[tcp_trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
Willy Tarreaud5ca9ab2013-05-28 17:40:25 +02001039 if (s->fe != s->be)
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001040 stkctr_set_flags(&s->stkctr[tcp_trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
Willy Tarreaud1f96522010-08-03 19:34:32 +02001041 }
1042 }
1043 else {
Willy Tarreauedcf6682008-11-30 23:15:34 +01001044 /* otherwise accept */
Willy Tarreaud1f96522010-08-03 19:34:32 +02001045 break;
1046 }
Willy Tarreauedcf6682008-11-30 23:15:34 +01001047 }
1048 }
1049
1050 /* if we get there, it means we have no rule which matches, or
1051 * we have an explicit accept, so we apply the default accept.
1052 */
Willy Tarreau3a816292009-07-07 10:55:49 +02001053 req->analysers &= ~an_bit;
Willy Tarreauedcf6682008-11-30 23:15:34 +01001054 req->analyse_exp = TICK_ETERNITY;
1055 return 1;
1056}
1057
Emeric Brun97679e72010-09-23 17:56:44 +02001058/* This function performs the TCP response analysis on the current response. It
1059 * returns 1 if the processing can continue on next analysers, or zero if it
1060 * needs more data, encounters an error, or wants to immediately abort the
1061 * response. It relies on buffers flags, and updates s->rep->analysers. The
1062 * function may be called for backend rules.
1063 */
Willy Tarreau7421efb2012-07-02 15:11:27 +02001064int tcp_inspect_response(struct session *s, struct channel *rep, int an_bit)
Emeric Brun97679e72010-09-23 17:56:44 +02001065{
1066 struct tcp_rule *rule;
1067 int partial;
1068
Willy Tarreau02d6cfc2012-03-01 18:19:58 +01001069 DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
Emeric Brun97679e72010-09-23 17:56:44 +02001070 now_ms, __FUNCTION__,
1071 s,
1072 rep,
1073 rep->rex, rep->wex,
1074 rep->flags,
Willy Tarreau9b28e032012-10-12 23:49:43 +02001075 rep->buf->i,
Emeric Brun97679e72010-09-23 17:56:44 +02001076 rep->analysers);
1077
1078 /* We don't know whether we have enough data, so must proceed
1079 * this way :
1080 * - iterate through all rules in their declaration order
1081 * - if one rule returns MISS, it means the inspect delay is
1082 * not over yet, then return immediately, otherwise consider
1083 * it as a non-match.
1084 * - if one rule returns OK, then return OK
1085 * - if one rule returns KO, then return KO
1086 */
1087
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001088 if (rep->flags & CF_SHUTR || tick_is_expired(rep->analyse_exp, now_ms))
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001089 partial = SMP_OPT_FINAL;
Emeric Brun97679e72010-09-23 17:56:44 +02001090 else
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001091 partial = 0;
Emeric Brun97679e72010-09-23 17:56:44 +02001092
1093 list_for_each_entry(rule, &s->be->tcp_rep.inspect_rules, list) {
Willy Tarreau0cba6072013-11-28 22:21:02 +01001094 enum acl_test_res ret = ACL_TEST_PASS;
Emeric Brun97679e72010-09-23 17:56:44 +02001095
1096 if (rule->cond) {
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001097 ret = acl_exec_cond(rule->cond, s->be, s, &s->txn, SMP_OPT_DIR_RES | partial);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +01001098 if (ret == ACL_TEST_MISS) {
Emeric Brun97679e72010-09-23 17:56:44 +02001099 /* just set the analyser timeout once at the beginning of the response */
1100 if (!tick_isset(rep->analyse_exp) && s->be->tcp_rep.inspect_delay)
Willy Tarreau0bb166b2013-11-04 15:56:53 +01001101 rep->analyse_exp = tick_add(now_ms, s->be->tcp_rep.inspect_delay);
Emeric Brun97679e72010-09-23 17:56:44 +02001102 return 0;
1103 }
1104
1105 ret = acl_pass(ret);
1106 if (rule->cond->pol == ACL_COND_UNLESS)
1107 ret = !ret;
1108 }
1109
1110 if (ret) {
1111 /* we have a matching rule. */
1112 if (rule->action == TCP_ACT_REJECT) {
Willy Tarreau8263d2b2012-08-28 00:06:31 +02001113 channel_abort(rep);
1114 channel_abort(s->req);
Emeric Brun97679e72010-09-23 17:56:44 +02001115 rep->analysers = 0;
1116
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001117 s->be->be_counters.denied_resp++;
1118 s->fe->fe_counters.denied_resp++;
Emeric Brun97679e72010-09-23 17:56:44 +02001119 if (s->listener->counters)
1120 s->listener->counters->denied_resp++;
1121
1122 if (!(s->flags & SN_ERR_MASK))
1123 s->flags |= SN_ERR_PRXCOND;
1124 if (!(s->flags & SN_FINST_MASK))
1125 s->flags |= SN_FINST_D;
1126 return 0;
1127 }
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001128 else if (rule->action == TCP_ACT_CLOSE) {
1129 rep->prod->flags |= SI_FL_NOLINGER | SI_FL_NOHALF;
1130 si_shutr(rep->prod);
1131 si_shutw(rep->prod);
1132 break;
1133 }
Emeric Brun97679e72010-09-23 17:56:44 +02001134 else {
1135 /* otherwise accept */
1136 break;
1137 }
1138 }
1139 }
1140
1141 /* if we get there, it means we have no rule which matches, or
1142 * we have an explicit accept, so we apply the default accept.
1143 */
1144 rep->analysers &= ~an_bit;
1145 rep->analyse_exp = TICK_ETERNITY;
1146 return 1;
1147}
1148
1149
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001150/* This function performs the TCP layer4 analysis on the current request. It
1151 * returns 0 if a reject rule matches, otherwise 1 if either an accept rule
1152 * matches or if no more rule matches. It can only use rules which don't need
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001153 * any data. This only works on connection-based client-facing stream interfaces.
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001154 */
1155int tcp_exec_req_rules(struct session *s)
1156{
1157 struct tcp_rule *rule;
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001158 struct stksess *ts;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001159 struct stktable *t = NULL;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001160 struct connection *conn = objt_conn(s->si[0].end);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001161 int result = 1;
Willy Tarreau0cba6072013-11-28 22:21:02 +01001162 enum acl_test_res ret;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001163
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001164 if (!conn)
1165 return result;
1166
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001167 list_for_each_entry(rule, &s->fe->tcp_req.l4_rules, list) {
Thierry FOURNIERa65b3432013-11-28 18:22:00 +01001168 ret = ACL_TEST_PASS;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001169
1170 if (rule->cond) {
Willy Tarreau32a6f2e2012-04-25 10:13:36 +02001171 ret = acl_exec_cond(rule->cond, s->fe, s, NULL, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001172 ret = acl_pass(ret);
1173 if (rule->cond->pol == ACL_COND_UNLESS)
1174 ret = !ret;
1175 }
1176
1177 if (ret) {
1178 /* we have a matching rule. */
1179 if (rule->action == TCP_ACT_REJECT) {
Willy Tarreau7d0aaf32011-03-10 23:25:56 +01001180 s->fe->fe_counters.denied_conn++;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001181 if (s->listener->counters)
Willy Tarreau2799e982010-06-05 15:43:21 +02001182 s->listener->counters->denied_conn++;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001183
1184 if (!(s->flags & SN_ERR_MASK))
1185 s->flags |= SN_ERR_PRXCOND;
1186 if (!(s->flags & SN_FINST_MASK))
1187 s->flags |= SN_FINST_R;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001188 result = 0;
1189 break;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001190 }
Willy Tarreau44778ad2013-10-30 19:24:00 +01001191 else if (rule->action >= TCP_ACT_TRK_SC0 && rule->action <= TCP_ACT_TRK_SCMAX) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001192 /* Note: only the first valid tracking parameter of each
1193 * applies.
1194 */
1195 struct stktable_key *key;
1196
Willy Tarreaucc08d2c2014-01-28 23:18:23 +01001197 if (stkctr_entry(&s->stkctr[tcp_trk_idx(rule->action)]))
Willy Tarreau44778ad2013-10-30 19:24:00 +01001198 continue;
1199
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001200 t = rule->act_prm.trk_ctr.table.t;
1201 key = stktable_fetch_key(t, s->be, s, &s->txn, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->act_prm.trk_ctr.expr);
1202
Willy Tarreaud5ca9ab2013-05-28 17:40:25 +02001203 if (key && (ts = stktable_get_entry(t, key)))
1204 session_track_stkctr(&s->stkctr[tcp_trk_idx(rule->action)], t, ts);
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001205 }
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001206 else if (rule->action == TCP_ACT_EXPECT_PX) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001207 conn->flags |= CO_FL_ACCEPT_PROXY;
1208 conn_sock_want_recv(conn);
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001209 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001210 else {
1211 /* otherwise it's an accept */
1212 break;
1213 }
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001214 }
1215 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001216 return result;
Willy Tarreaua5c0ab22010-05-31 10:30:33 +02001217}
1218
Emeric Brun97679e72010-09-23 17:56:44 +02001219/* Parse a tcp-response rule. Return a negative value in case of failure */
1220static int tcp_parse_response_rule(char **args, int arg, int section_type,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001221 struct proxy *curpx, struct proxy *defpx,
1222 struct tcp_rule *rule, char **err,
1223 unsigned int where,
1224 const char *file, int line)
Emeric Brun97679e72010-09-23 17:56:44 +02001225{
1226 if (curpx == defpx || !(curpx->cap & PR_CAP_BE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001227 memprintf(err, "%s %s is only allowed in 'backend' sections",
1228 args[0], args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001229 return -1;
1230 }
1231
1232 if (strcmp(args[arg], "accept") == 0) {
1233 arg++;
1234 rule->action = TCP_ACT_ACCEPT;
1235 }
1236 else if (strcmp(args[arg], "reject") == 0) {
1237 arg++;
1238 rule->action = TCP_ACT_REJECT;
1239 }
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001240 else if (strcmp(args[arg], "close") == 0) {
1241 arg++;
1242 rule->action = TCP_ACT_CLOSE;
1243 }
Emeric Brun97679e72010-09-23 17:56:44 +02001244 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001245 memprintf(err,
Willy Tarreaucc1e04b2013-09-11 23:20:29 +02001246 "'%s %s' expects 'accept', 'close' or 'reject' in %s '%s' (got '%s')",
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001247 args[0], args[1], proxy_type_str(curpx), curpx->id, args[arg]);
Emeric Brun97679e72010-09-23 17:56:44 +02001248 return -1;
1249 }
1250
1251 if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001252 if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001253 memprintf(err,
1254 "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
1255 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);
Emeric Brun97679e72010-09-23 17:56:44 +02001256 return -1;
1257 }
1258 }
1259 else if (*args[arg]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001260 memprintf(err,
1261 "'%s %s %s' only accepts 'if' or 'unless', in %s '%s' (got '%s')",
Emeric Brun97679e72010-09-23 17:56:44 +02001262 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg]);
1263 return -1;
1264 }
1265 return 0;
1266}
1267
1268
1269
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001270/* Parse a tcp-request rule. Return a negative value in case of failure */
1271static int tcp_parse_request_rule(char **args, int arg, int section_type,
Willy Tarreau80aca902013-01-07 15:42:20 +01001272 struct proxy *curpx, struct proxy *defpx,
1273 struct tcp_rule *rule, char **err,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001274 unsigned int where, const char *file, int line)
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001275{
1276 if (curpx == defpx) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001277 memprintf(err, "%s %s is not allowed in 'defaults' sections",
1278 args[0], args[1]);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001279 return -1;
1280 }
1281
1282 if (!strcmp(args[arg], "accept")) {
1283 arg++;
1284 rule->action = TCP_ACT_ACCEPT;
1285 }
1286 else if (!strcmp(args[arg], "reject")) {
1287 arg++;
1288 rule->action = TCP_ACT_REJECT;
1289 }
Willy Tarreaub4c84932013-07-23 19:15:30 +02001290 else if (strncmp(args[arg], "track-sc", 8) == 0 &&
1291 args[arg][9] == '\0' && args[arg][8] >= '0' &&
1292 args[arg][8] <= '0' + MAX_SESS_STKCTR) { /* track-sc 0..9 */
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001293 struct sample_expr *expr;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001294 int kw = arg;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001295
1296 arg++;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001297
Willy Tarreaua4312fa2013-04-02 16:34:32 +02001298 curpx->conf.args.ctx = ARGC_TRK;
Thierry FOURNIEReeaa9512014-02-11 14:00:19 +01001299 expr = sample_parse_expr(args, &arg, file, line, err, &curpx->conf.args);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001300 if (!expr) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001301 memprintf(err,
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001302 "'%s %s %s' : %s",
Willy Tarreau975c1782013-12-12 23:16:54 +01001303 args[0], args[1], args[kw], *err);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001304 return -1;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001305 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001306
Willy Tarreau80aca902013-01-07 15:42:20 +01001307 if (!(expr->fetch->val & where)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001308 memprintf(err,
Willy Tarreau80aca902013-01-07 15:42:20 +01001309 "'%s %s %s' : fetch method '%s' extracts information from '%s', none of which is available here",
Willy Tarreau33c60de2013-04-12 08:26:32 +02001310 args[0], args[1], args[kw], args[arg-1], sample_src_names(expr->fetch->use));
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001311 free(expr);
1312 return -1;
1313 }
1314
1315 /* check if we need to allocate an hdr_idx struct for HTTP parsing */
Willy Tarreau25320b22013-03-24 07:22:08 +01001316 curpx->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001317
1318 if (strcmp(args[arg], "table") == 0) {
Willy Tarreau598718a2012-12-09 16:57:27 +01001319 arg++;
1320 if (!args[arg]) {
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001321 memprintf(err,
1322 "'%s %s %s' : missing table name",
1323 args[0], args[1], args[kw]);
1324 free(expr);
1325 return -1;
1326 }
1327 /* we copy the table name for now, it will be resolved later */
Willy Tarreau598718a2012-12-09 16:57:27 +01001328 rule->act_prm.trk_ctr.table.n = strdup(args[arg]);
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001329 arg++;
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001330 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001331 rule->act_prm.trk_ctr.expr = expr;
Willy Tarreaube4a3ef2013-06-17 15:04:07 +02001332 rule->action = TCP_ACT_TRK_SC0 + args[kw][8] - '0';
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001333 }
Willy Tarreau4f0d9192013-06-11 20:40:55 +02001334 else if (strcmp(args[arg], "expect-proxy") == 0) {
1335 if (strcmp(args[arg+1], "layer4") != 0) {
1336 memprintf(err,
1337 "'%s %s %s' only supports 'layer4' in %s '%s' (got '%s')",
1338 args[0], args[1], args[arg], proxy_type_str(curpx), curpx->id, args[arg+1]);
1339 return -1;
1340 }
1341
1342 if (!(where & SMP_VAL_FE_CON_ACC)) {
1343 memprintf(err,
1344 "'%s %s' is not allowed in '%s %s' rules in %s '%s'",
1345 args[arg], args[arg+1], args[0], args[1], proxy_type_str(curpx), curpx->id);
1346 return -1;
1347 }
1348
1349 arg += 2;
1350 rule->action = TCP_ACT_EXPECT_PX;
1351 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001352 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001353 memprintf(err,
Willy Tarreaub4c84932013-07-23 19:15:30 +02001354 "'%s %s' expects 'accept', 'reject', 'track-sc0' ... 'track-sc%d' "
1355 " in %s '%s' (got '%s')",
1356 args[0], args[1], MAX_SESS_STKCTR, proxy_type_str(curpx), curpx->id, args[arg]);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001357 return -1;
1358 }
1359
1360 if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001361 if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001362 memprintf(err,
1363 "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
1364 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001365 return -1;
1366 }
1367 }
1368 else if (*args[arg]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001369 memprintf(err,
1370 "'%s %s %s' only accepts 'if' or 'unless', in %s '%s' (got '%s')",
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001371 args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg]);
1372 return -1;
1373 }
1374 return 0;
1375}
1376
Emeric Brun97679e72010-09-23 17:56:44 +02001377/* This function should be called to parse a line starting with the "tcp-response"
1378 * keyword.
1379 */
1380static int tcp_parse_tcp_rep(char **args, int section_type, struct proxy *curpx,
Willy Tarreau28a47d62012-09-18 20:02:48 +02001381 struct proxy *defpx, const char *file, int line,
1382 char **err)
Emeric Brun97679e72010-09-23 17:56:44 +02001383{
1384 const char *ptr = NULL;
1385 unsigned int val;
Emeric Brun97679e72010-09-23 17:56:44 +02001386 int warn = 0;
1387 int arg;
1388 struct tcp_rule *rule;
Willy Tarreau80aca902013-01-07 15:42:20 +01001389 unsigned int where;
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001390 const struct acl *acl;
Willy Tarreau93fddf12013-03-31 22:59:32 +02001391 const char *kw;
Emeric Brun97679e72010-09-23 17:56:44 +02001392
1393 if (!*args[1]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001394 memprintf(err, "missing argument for '%s' in %s '%s'",
1395 args[0], proxy_type_str(curpx), curpx->id);
Emeric Brun97679e72010-09-23 17:56:44 +02001396 return -1;
1397 }
1398
1399 if (strcmp(args[1], "inspect-delay") == 0) {
1400 if (curpx == defpx || !(curpx->cap & PR_CAP_BE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001401 memprintf(err, "%s %s is only allowed in 'backend' sections",
1402 args[0], args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001403 return -1;
1404 }
1405
1406 if (!*args[2] || (ptr = parse_time_err(args[2], &val, TIME_UNIT_MS))) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001407 memprintf(err,
1408 "'%s %s' expects a positive delay in milliseconds, in %s '%s'",
1409 args[0], args[1], proxy_type_str(curpx), curpx->id);
1410 if (ptr)
1411 memprintf(err, "%s (unexpected character '%c')", *err, *ptr);
Emeric Brun97679e72010-09-23 17:56:44 +02001412 return -1;
1413 }
1414
1415 if (curpx->tcp_rep.inspect_delay) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001416 memprintf(err, "ignoring %s %s (was already defined) in %s '%s'",
1417 args[0], args[1], proxy_type_str(curpx), curpx->id);
Emeric Brun97679e72010-09-23 17:56:44 +02001418 return 1;
1419 }
1420 curpx->tcp_rep.inspect_delay = val;
1421 return 0;
1422 }
1423
Simon Hormande072bd2011-06-24 15:11:37 +09001424 rule = calloc(1, sizeof(*rule));
Emeric Brun97679e72010-09-23 17:56:44 +02001425 LIST_INIT(&rule->list);
1426 arg = 1;
Willy Tarreau80aca902013-01-07 15:42:20 +01001427 where = 0;
Emeric Brun97679e72010-09-23 17:56:44 +02001428
1429 if (strcmp(args[1], "content") == 0) {
1430 arg++;
Willy Tarreau80aca902013-01-07 15:42:20 +01001431
1432 if (curpx->cap & PR_CAP_FE)
1433 where |= SMP_VAL_FE_RES_CNT;
1434 if (curpx->cap & PR_CAP_BE)
1435 where |= SMP_VAL_BE_RES_CNT;
1436
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001437 if (tcp_parse_response_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Emeric Brun97679e72010-09-23 17:56:44 +02001438 goto error;
1439
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001440 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1441 if (acl) {
1442 if (acl->name && *acl->name)
1443 memprintf(err,
1444 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1445 acl->name, args[0], args[1], sample_ckp_names(where));
1446 else
1447 memprintf(err,
1448 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1449 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001450 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001451 sample_ckp_names(where));
Emeric Brun97679e72010-09-23 17:56:44 +02001452
Emeric Brun97679e72010-09-23 17:56:44 +02001453 warn++;
1454 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001455 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1456 if (acl->name && *acl->name)
1457 memprintf(err,
1458 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001459 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001460 else
1461 memprintf(err,
1462 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001463 kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001464 warn++;
1465 }
Emeric Brun97679e72010-09-23 17:56:44 +02001466
1467 LIST_ADDQ(&curpx->tcp_rep.inspect_rules, &rule->list);
1468 }
1469 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001470 memprintf(err,
1471 "'%s' expects 'inspect-delay' or 'content' in %s '%s' (got '%s')",
1472 args[0], proxy_type_str(curpx), curpx->id, args[1]);
Emeric Brun97679e72010-09-23 17:56:44 +02001473 goto error;
1474 }
1475
1476 return warn;
1477 error:
1478 free(rule);
1479 return -1;
1480}
1481
1482
Willy Tarreaub6866442008-07-14 23:54:42 +02001483/* This function should be called to parse a line starting with the "tcp-request"
1484 * keyword.
1485 */
1486static int tcp_parse_tcp_req(char **args, int section_type, struct proxy *curpx,
Willy Tarreau28a47d62012-09-18 20:02:48 +02001487 struct proxy *defpx, const char *file, int line,
1488 char **err)
Willy Tarreaub6866442008-07-14 23:54:42 +02001489{
1490 const char *ptr = NULL;
Willy Tarreauc7e961e2008-08-17 17:13:47 +02001491 unsigned int val;
Willy Tarreau1a687942010-05-23 22:40:30 +02001492 int warn = 0;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001493 int arg;
Willy Tarreau1a687942010-05-23 22:40:30 +02001494 struct tcp_rule *rule;
Willy Tarreau80aca902013-01-07 15:42:20 +01001495 unsigned int where;
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001496 const struct acl *acl;
Willy Tarreau93fddf12013-03-31 22:59:32 +02001497 const char *kw;
Willy Tarreaub6866442008-07-14 23:54:42 +02001498
1499 if (!*args[1]) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001500 if (curpx == defpx)
1501 memprintf(err, "missing argument for '%s' in defaults section", args[0]);
1502 else
1503 memprintf(err, "missing argument for '%s' in %s '%s'",
1504 args[0], proxy_type_str(curpx), curpx->id);
Willy Tarreaub6866442008-07-14 23:54:42 +02001505 return -1;
1506 }
1507
1508 if (!strcmp(args[1], "inspect-delay")) {
1509 if (curpx == defpx) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001510 memprintf(err, "%s %s is not allowed in 'defaults' sections",
1511 args[0], args[1]);
Willy Tarreaub6866442008-07-14 23:54:42 +02001512 return -1;
1513 }
1514
Willy Tarreaub6866442008-07-14 23:54:42 +02001515 if (!*args[2] || (ptr = parse_time_err(args[2], &val, TIME_UNIT_MS))) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001516 memprintf(err,
1517 "'%s %s' expects a positive delay in milliseconds, in %s '%s'",
1518 args[0], args[1], proxy_type_str(curpx), curpx->id);
1519 if (ptr)
1520 memprintf(err, "%s (unexpected character '%c')", *err, *ptr);
Willy Tarreaub6866442008-07-14 23:54:42 +02001521 return -1;
1522 }
1523
1524 if (curpx->tcp_req.inspect_delay) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001525 memprintf(err, "ignoring %s %s (was already defined) in %s '%s'",
1526 args[0], args[1], proxy_type_str(curpx), curpx->id);
Willy Tarreaub6866442008-07-14 23:54:42 +02001527 return 1;
1528 }
1529 curpx->tcp_req.inspect_delay = val;
1530 return 0;
1531 }
1532
Simon Hormande072bd2011-06-24 15:11:37 +09001533 rule = calloc(1, sizeof(*rule));
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001534 LIST_INIT(&rule->list);
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001535 arg = 1;
Willy Tarreau80aca902013-01-07 15:42:20 +01001536 where = 0;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001537
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001538 if (strcmp(args[1], "content") == 0) {
Willy Tarreaud1f96522010-08-03 19:34:32 +02001539 arg++;
Willy Tarreau80aca902013-01-07 15:42:20 +01001540
1541 if (curpx->cap & PR_CAP_FE)
1542 where |= SMP_VAL_FE_REQ_CNT;
1543 if (curpx->cap & PR_CAP_BE)
1544 where |= SMP_VAL_BE_REQ_CNT;
1545
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001546 if (tcp_parse_request_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001547 goto error;
Willy Tarreaub6866442008-07-14 23:54:42 +02001548
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001549 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1550 if (acl) {
1551 if (acl->name && *acl->name)
1552 memprintf(err,
1553 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1554 acl->name, args[0], args[1], sample_ckp_names(where));
1555 else
1556 memprintf(err,
1557 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1558 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001559 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001560 sample_ckp_names(where));
Willy Tarreaudd64f8d2008-07-27 22:02:32 +02001561
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001562 warn++;
1563 }
1564 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1565 if (acl->name && *acl->name)
1566 memprintf(err,
1567 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001568 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001569 else
1570 memprintf(err,
1571 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001572 kw, sample_ckp_names(where));
Willy Tarreaudd64f8d2008-07-27 22:02:32 +02001573 warn++;
1574 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001575
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001576 LIST_ADDQ(&curpx->tcp_req.inspect_rules, &rule->list);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001577 }
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001578 else if (strcmp(args[1], "connection") == 0) {
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001579 arg++;
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001580
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001581 if (!(curpx->cap & PR_CAP_FE)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001582 memprintf(err, "%s %s is not allowed because %s %s is not a frontend",
1583 args[0], args[1], proxy_type_str(curpx), curpx->id);
Simon Horman6c54d8b2011-07-15 13:14:06 +09001584 goto error;
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001585 }
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001586
Willy Tarreau80aca902013-01-07 15:42:20 +01001587 where |= SMP_VAL_FE_CON_ACC;
1588
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +01001589 if (tcp_parse_request_rule(args, arg, section_type, curpx, defpx, rule, err, where, file, line) < 0)
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001590 goto error;
1591
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001592 acl = rule->cond ? acl_cond_conflicts(rule->cond, where) : NULL;
1593 if (acl) {
1594 if (acl->name && *acl->name)
1595 memprintf(err,
1596 "acl '%s' will never match in '%s %s' because it only involves keywords that are incompatible with '%s'",
1597 acl->name, args[0], args[1], sample_ckp_names(where));
1598 else
1599 memprintf(err,
1600 "anonymous acl will never match in '%s %s' because it uses keyword '%s' which is incompatible with '%s'",
1601 args[0], args[1],
Willy Tarreau93fddf12013-03-31 22:59:32 +02001602 LIST_ELEM(acl->expr.n, struct acl_expr *, list)->kw,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001603 sample_ckp_names(where));
Willy Tarreauf059a0f2010-08-03 16:29:52 +02001604
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001605 warn++;
1606 }
1607 else if (rule->cond && acl_cond_kw_conflicts(rule->cond, where, &acl, &kw)) {
1608 if (acl->name && *acl->name)
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001609 memprintf(err,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001610 "acl '%s' involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001611 acl->name, kw, sample_ckp_names(where));
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001612 else
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001613 memprintf(err,
Willy Tarreaua91d0a52013-03-25 08:12:18 +01001614 "anonymous acl involves keyword '%s' which is incompatible with '%s'",
Willy Tarreau93fddf12013-03-31 22:59:32 +02001615 kw, sample_ckp_names(where));
Willy Tarreau68c03ab2010-08-06 15:08:45 +02001616 warn++;
1617 }
Willy Tarreau5d5b5d82012-12-09 12:00:04 +01001618
Willy Tarreaufb024dc2010-08-20 13:35:41 +02001619 LIST_ADDQ(&curpx->tcp_req.l4_rules, &rule->list);
Willy Tarreau9ba2dcc2010-06-14 21:04:55 +02001620 }
Willy Tarreau1a687942010-05-23 22:40:30 +02001621 else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +02001622 if (curpx == defpx)
1623 memprintf(err,
1624 "'%s' expects 'inspect-delay', 'connection', or 'content' in defaults section (got '%s')",
1625 args[0], args[1]);
1626 else
1627 memprintf(err,
1628 "'%s' expects 'inspect-delay', 'connection', or 'content' in %s '%s' (got '%s')",
Willy Tarreaudeaec2f2013-04-10 16:31:11 +02001629 args[0], proxy_type_str(curpx), curpx->id, args[1]);
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001630 goto error;
Willy Tarreau1a687942010-05-23 22:40:30 +02001631 }
1632
Willy Tarreau1a687942010-05-23 22:40:30 +02001633 return warn;
Willy Tarreau6a984fa2010-06-14 16:44:27 +02001634 error:
1635 free(rule);
1636 return -1;
Willy Tarreaub6866442008-07-14 23:54:42 +02001637}
1638
Willy Tarreau645513a2010-05-24 20:55:15 +02001639
1640/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001641/* All supported sample fetch functions must be declared here */
Willy Tarreau32389b72012-04-23 23:13:20 +02001642/************************************************************************/
1643
Willy Tarreau4a129812012-04-25 17:31:42 +02001644/* fetch the connection's source IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001645static int
Willy Tarreau4a129812012-04-25 17:31:42 +02001646smp_fetch_src(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001647 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001648{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001649 struct connection *cli_conn = objt_conn(l4->si[0].end);
1650
1651 if (!cli_conn)
1652 return 0;
1653
1654 switch (cli_conn->addr.from.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001655 case AF_INET:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001656 smp->data.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001657 smp->type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001658 break;
1659 case AF_INET6:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001660 smp->data.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.from)->sin6_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001661 smp->type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001662 break;
1663 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001664 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001665 }
Emeric Brunf769f512010-10-22 17:14:01 +02001666
Willy Tarreau37406352012-04-23 16:16:37 +02001667 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001668 return 1;
1669}
1670
Willy Tarreaua5e37562011-12-16 17:06:15 +01001671/* set temp integer to the connection's source port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001672static int
Willy Tarreau25c1ebc2012-04-25 16:21:44 +02001673smp_fetch_sport(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001674 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001675{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001676 struct connection *cli_conn = objt_conn(l4->si[0].end);
1677
1678 if (!cli_conn)
1679 return 0;
1680
Willy Tarreauf853c462012-04-23 18:53:56 +02001681 smp->type = SMP_T_UINT;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001682 if (!(smp->data.uint = get_host_port(&cli_conn->addr.from)))
Emeric Brunf769f512010-10-22 17:14:01 +02001683 return 0;
1684
Willy Tarreau37406352012-04-23 16:16:37 +02001685 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001686 return 1;
1687}
1688
Willy Tarreau4a129812012-04-25 17:31:42 +02001689/* fetch the connection's destination IPv4/IPv6 address */
Willy Tarreau645513a2010-05-24 20:55:15 +02001690static int
Willy Tarreau4a129812012-04-25 17:31:42 +02001691smp_fetch_dst(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001692 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001693{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001694 struct connection *cli_conn = objt_conn(l4->si[0].end);
Willy Tarreau645513a2010-05-24 20:55:15 +02001695
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001696 if (!cli_conn)
1697 return 0;
1698
1699 conn_get_to_addr(cli_conn);
1700
1701 switch (cli_conn->addr.to.ss_family) {
Willy Tarreauf4362b32011-12-16 17:49:52 +01001702 case AF_INET:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001703 smp->data.ipv4 = ((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001704 smp->type = SMP_T_IPV4;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001705 break;
1706 case AF_INET6:
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001707 smp->data.ipv6 = ((struct sockaddr_in6 *)&cli_conn->addr.to)->sin6_addr;
Willy Tarreauf853c462012-04-23 18:53:56 +02001708 smp->type = SMP_T_IPV6;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001709 break;
1710 default:
Emeric Brunf769f512010-10-22 17:14:01 +02001711 return 0;
Willy Tarreauf4362b32011-12-16 17:49:52 +01001712 }
Emeric Brunf769f512010-10-22 17:14:01 +02001713
Willy Tarreau37406352012-04-23 16:16:37 +02001714 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001715 return 1;
1716}
1717
Willy Tarreaua5e37562011-12-16 17:06:15 +01001718/* set temp integer to the frontend connexion's destination port */
Willy Tarreau645513a2010-05-24 20:55:15 +02001719static int
Willy Tarreau25c1ebc2012-04-25 16:21:44 +02001720smp_fetch_dport(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
Willy Tarreauef38c392013-07-22 16:29:32 +02001721 const struct arg *args, struct sample *smp, const char *kw)
Willy Tarreau645513a2010-05-24 20:55:15 +02001722{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001723 struct connection *cli_conn = objt_conn(l4->si[0].end);
1724
1725 if (!cli_conn)
1726 return 0;
1727
1728 conn_get_to_addr(cli_conn);
Willy Tarreau645513a2010-05-24 20:55:15 +02001729
Willy Tarreauf853c462012-04-23 18:53:56 +02001730 smp->type = SMP_T_UINT;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001731 if (!(smp->data.uint = get_host_port(&cli_conn->addr.to)))
Emeric Brunf769f512010-10-22 17:14:01 +02001732 return 0;
1733
Willy Tarreau37406352012-04-23 16:16:37 +02001734 smp->flags = 0;
Willy Tarreau645513a2010-05-24 20:55:15 +02001735 return 1;
Emericf2d7cae2010-11-05 18:13:50 +01001736}
1737
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001738#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001739/* parse the "v4v6" bind keyword */
1740static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1741{
1742 struct listener *l;
1743
1744 list_for_each_entry(l, &conf->listeners, by_bind) {
1745 if (l->addr.ss_family == AF_INET6)
1746 l->options |= LI_O_V4V6;
1747 }
1748
1749 return 0;
1750}
1751
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001752/* parse the "v6only" bind keyword */
1753static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1754{
1755 struct listener *l;
1756
1757 list_for_each_entry(l, &conf->listeners, by_bind) {
1758 if (l->addr.ss_family == AF_INET6)
1759 l->options |= LI_O_V6ONLY;
1760 }
1761
1762 return 0;
1763}
1764#endif
1765
Pieter Baauwd551fb52013-05-08 22:49:23 +02001766#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001767/* parse the "transparent" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001768static 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 +02001769{
1770 struct listener *l;
1771
Willy Tarreau4348fad2012-09-20 16:48:07 +02001772 list_for_each_entry(l, &conf->listeners, by_bind) {
1773 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1774 l->options |= LI_O_FOREIGN;
Willy Tarreau44791242012-09-12 23:27:21 +02001775 }
1776
Willy Tarreau44791242012-09-12 23:27:21 +02001777 return 0;
1778}
1779#endif
1780
1781#ifdef TCP_DEFER_ACCEPT
1782/* parse the "defer-accept" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001783static 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 +02001784{
1785 struct listener *l;
1786
Willy Tarreau4348fad2012-09-20 16:48:07 +02001787 list_for_each_entry(l, &conf->listeners, by_bind) {
1788 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1789 l->options |= LI_O_DEF_ACCEPT;
Willy Tarreau44791242012-09-12 23:27:21 +02001790 }
1791
Willy Tarreau44791242012-09-12 23:27:21 +02001792 return 0;
1793}
1794#endif
1795
Willy Tarreau1c862c52012-10-05 16:21:00 +02001796#ifdef TCP_FASTOPEN
Lukas Tribus0defb902013-02-13 23:35:39 +01001797/* parse the "tfo" bind keyword */
Willy Tarreau1c862c52012-10-05 16:21:00 +02001798static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
1799{
1800 struct listener *l;
1801
1802 list_for_each_entry(l, &conf->listeners, by_bind) {
1803 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1804 l->options |= LI_O_TCP_FO;
1805 }
1806
1807 return 0;
1808}
1809#endif
1810
Willy Tarreau44791242012-09-12 23:27:21 +02001811#ifdef TCP_MAXSEG
1812/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001813static 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 +02001814{
1815 struct listener *l;
1816 int mss;
1817
Willy Tarreau44791242012-09-12 23:27:21 +02001818 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001819 memprintf(err, "'%s' : missing MSS value", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001820 return ERR_ALERT | ERR_FATAL;
1821 }
1822
1823 mss = atoi(args[cur_arg + 1]);
1824 if (!mss || abs(mss) > 65535) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001825 memprintf(err, "'%s' : expects an MSS with and absolute value between 1 and 65535", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001826 return ERR_ALERT | ERR_FATAL;
1827 }
1828
Willy Tarreau4348fad2012-09-20 16:48:07 +02001829 list_for_each_entry(l, &conf->listeners, by_bind) {
1830 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1831 l->maxseg = mss;
1832 }
Willy Tarreau44791242012-09-12 23:27:21 +02001833
1834 return 0;
1835}
1836#endif
1837
1838#ifdef SO_BINDTODEVICE
1839/* parse the "mss" bind keyword */
Willy Tarreau4348fad2012-09-20 16:48:07 +02001840static 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 +02001841{
1842 struct listener *l;
1843
Willy Tarreau44791242012-09-12 23:27:21 +02001844 if (!*args[cur_arg + 1]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +02001845 memprintf(err, "'%s' : missing interface name", args[cur_arg]);
Willy Tarreau44791242012-09-12 23:27:21 +02001846 return ERR_ALERT | ERR_FATAL;
1847 }
1848
Willy Tarreau4348fad2012-09-20 16:48:07 +02001849 list_for_each_entry(l, &conf->listeners, by_bind) {
1850 if (l->addr.ss_family == AF_INET || l->addr.ss_family == AF_INET6)
1851 l->interface = strdup(args[cur_arg + 1]);
1852 }
Willy Tarreau44791242012-09-12 23:27:21 +02001853
1854 global.last_checks |= LSTCHK_NETADM;
1855 return 0;
1856}
1857#endif
1858
Willy Tarreaudc13c112013-06-21 23:16:39 +02001859static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001860 { CFG_LISTEN, "tcp-request", tcp_parse_tcp_req },
Emeric Brun97679e72010-09-23 17:56:44 +02001861 { CFG_LISTEN, "tcp-response", tcp_parse_tcp_rep },
Willy Tarreaub6866442008-07-14 23:54:42 +02001862 { 0, NULL, NULL },
1863}};
1864
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001865
Willy Tarreau61612d42012-04-19 18:42:05 +02001866/* Note: must not be declared <const> as its list will be overwritten.
1867 * Please take care of keeping this list alphabetically sorted.
1868 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02001869static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001870 { /* END */ },
Willy Tarreaub6866442008-07-14 23:54:42 +02001871}};
1872
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001873
Willy Tarreau4a129812012-04-25 17:31:42 +02001874/* Note: must not be declared <const> as its list will be overwritten.
1875 * Note: fetches that may return multiple types must be declared as the lowest
1876 * common denominator, the type that can be casted into all other ones. For
1877 * instance v4/v6 must be declared v4.
1878 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02001879static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +01001880 { "dst", smp_fetch_dst, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
1881 { "dst_port", smp_fetch_dport, 0, NULL, SMP_T_UINT, SMP_USE_L4CLI },
1882 { "src", smp_fetch_src, 0, NULL, SMP_T_IPV4, SMP_USE_L4CLI },
1883 { "src_port", smp_fetch_sport, 0, NULL, SMP_T_UINT, SMP_USE_L4CLI },
1884 { /* END */ },
Willy Tarreau645513a2010-05-24 20:55:15 +02001885}};
1886
Willy Tarreau44791242012-09-12 23:27:21 +02001887/************************************************************************/
1888/* All supported bind keywords must be declared here. */
1889/************************************************************************/
1890
1891/* Note: must not be declared <const> as its list will be overwritten.
1892 * Please take care of keeping this list alphabetically sorted, doing so helps
1893 * all code contributors.
1894 * Optional keywords are also declared with a NULL ->parse() function so that
1895 * the config parser can report an appropriate error when a known keyword was
1896 * not enabled.
1897 */
Willy Tarreau51fb7652012-09-18 18:24:39 +02001898static struct bind_kw_list bind_kws = { "TCP", { }, {
Willy Tarreau44791242012-09-12 23:27:21 +02001899#ifdef TCP_DEFER_ACCEPT
1900 { "defer-accept", bind_parse_defer_accept, 0 }, /* wait for some data for 1 second max before doing accept */
1901#endif
1902#ifdef SO_BINDTODEVICE
1903 { "interface", bind_parse_interface, 1 }, /* specifically bind to this interface */
1904#endif
1905#ifdef TCP_MAXSEG
1906 { "mss", bind_parse_mss, 1 }, /* set MSS of listening socket */
1907#endif
Willy Tarreau1c862c52012-10-05 16:21:00 +02001908#ifdef TCP_FASTOPEN
1909 { "tfo", bind_parse_tfo, 0 }, /* enable TCP_FASTOPEN of listening socket */
1910#endif
Pieter Baauwd551fb52013-05-08 22:49:23 +02001911#ifdef CONFIG_HAP_TRANSPARENT
Willy Tarreau44791242012-09-12 23:27:21 +02001912 { "transparent", bind_parse_transparent, 0 }, /* transparently bind to the specified addresses */
1913#endif
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001914#ifdef IPV6_V6ONLY
Willy Tarreau77e3af92012-11-24 15:07:23 +01001915 { "v4v6", bind_parse_v4v6, 0 }, /* force socket to bind to IPv4+IPv6 */
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001916 { "v6only", bind_parse_v6only, 0 }, /* force socket to bind to IPv6 only */
1917#endif
Willy Tarreau44791242012-09-12 23:27:21 +02001918 /* the versions with the NULL parse function*/
1919 { "defer-accept", NULL, 0 },
1920 { "interface", NULL, 1 },
1921 { "mss", NULL, 1 },
1922 { "transparent", NULL, 0 },
Willy Tarreau77e3af92012-11-24 15:07:23 +01001923 { "v4v6", NULL, 0 },
Willy Tarreau9b6700f2012-11-24 11:55:28 +01001924 { "v6only", NULL, 0 },
Willy Tarreau44791242012-09-12 23:27:21 +02001925 { NULL, NULL, 0 },
1926}};
1927
Willy Tarreaue6b98942007-10-29 01:09:36 +01001928__attribute__((constructor))
1929static void __tcp_protocol_init(void)
1930{
1931 protocol_register(&proto_tcpv4);
1932 protocol_register(&proto_tcpv6);
Willy Tarreau12785782012-04-27 21:37:17 +02001933 sample_register_fetches(&sample_fetch_keywords);
Willy Tarreaub6866442008-07-14 23:54:42 +02001934 cfg_register_keywords(&cfg_kws);
1935 acl_register_keywords(&acl_kws);
Willy Tarreau44791242012-09-12 23:27:21 +02001936 bind_register_keywords(&bind_kws);
Willy Tarreaue6b98942007-10-29 01:09:36 +01001937}
1938
1939
1940/*
1941 * Local variables:
1942 * c-indent-level: 8
1943 * c-basic-offset: 8
1944 * End:
1945 */